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  • 1995-1999  (41,870)
  • 1940-1944  (4,706)
  • Chemistry  (45,129)
  • Engineering General  (1,423)
  • Ras
  • Recombinant DNA
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Material
Years
Year
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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of otolith chemistry in Nassau grouper (Epinephelus striatus) from the Bahamas and Belize using solution-based ICP-MS (1999)
    Springer
    Coral reefs 18 (1999), S. 171-178 
    Details
    ISSN: 1432-0975
    Keywords: Key words Otolith ; Chemistry ; ICP-MS ; Stock discrimination ; Epinephelus striatus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract  We examined the utility of otolith minor and trace element chemistry, assayed with inductively coupled plasma mass spectrometry (ICP-MS), as a means of delineating population structure in the Nassau grouper (Epinephelus striatus). We characterized the elemental composition of otoliths collected in 1993 from three locations in Exuma Sound, Bahamas and from Glover Reef, Belize in 1995. A single location in Exuma Sound was sampled in 1994 to test temporal variability in otolith composition. Five elements (Ca, Zn, Sr, Ba and Pb) were routinely detected, at levels significantly above background, by solution-based ICP-MS. Results from analysis of variance of elemental data, expressed as a ratio to Ca, indicated that there were no significant differences among the Exuma locations for any element, but significant variability was found between Glover Reef and the pooled Exuma localities for Zn/Ca, Sr/Ca and Ba/Ca ratios. Significant inter-annual differences at one Exuma Sound location was restricted to Ba/Ca ratios. Discriminant function analysis correctly classified 86% and 95% of the Belize and pooled Exuma sites, respectively. Otoliths from Belize were characterized by low Zn/Ca and high Ba/Ca and Pb/Ca ratios compared to otoliths from fish collected in Exuma Sound. Although differences in Ba levels may be related to upwelling at Glover Reef, more data are needed to definitely link otolith composition with regional differences in water chemistry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003380050176
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  • 2
    Electronic Resource
    Electronic Resource
    Strategies for gene cloning (1999)
    Springer
    Urological research 27 (1999), S. 83-96 
    Details
    ISSN: 1434-0879
    Keywords: Key words Genitourinary malignancies ; Recombinant DNA ; Gene cloning ; DNA chip technology ; Diagnostics ; Gene therapy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Cancer, including genitourinary malignancy, is a consequence of accumulated genetic aberrations in genes involved in crucial regulatory pathways. The result is a deregulation of cellular behaviour, leading to neoplastic transformation, uncontrolled cell proliferation and acquisition of metastatic ability. The development and perfection of techniques in the field of recombinant DNA technology, gene cloning, (differential) analysis of gene expression, and sequencing of genes and proteins have provided a wealth of information about the genetic aberrations associated with cancer development. This “recombinant DNA and gene cloning” technology and the recently developed DNA chip technology may provide new molecular diagnostic tools. Furthermore, the technology of gene cloning in combination with the progress in in vivo gene delivery techniques offers new treatment modalities, like gene therapy, additional to conventional therapies. This review is intended to provide a general introduction to the fundamentals or strategies of recombinant DNA and gene cloning techniques as a basis for understanding the rapidly expanding range of new diagnostic and therapeutic opportunities. Some illustrative examples are provided, addressing basic and biomedical research and possible clinical applications in genitourinary oncology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002400050093
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of SCH 59228, an orally bioavailable farnesyl protein transferase inhibitor, on the growth of oncogene-transformed fibroblasts and a human colon carcinoma xenograft in nude mice (1999)
    Springer
    Cancer chemotherapy and pharmacology 43 (1999), S. 50-58 
    Details
    ISSN: 1432-0843
    Keywords: Key words SCH 59228 ; Orally bioavailable ; Tricyclic farnesyl-transferase-inhibitor ; Ras ; Xenograft
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The products of the Ha-, Ki-, and N-ras proto-oncogenes comprise a family of 21 kDa guanine nucleotide-binding proteins which play a crucial role in growth factor signal transduction and in the control of cellular proliferation and differentiation. Activating mutations in the ras oncogenes occur in a wide variety of human tumors. Ras proteins undergo a series of posttranslational processing events. The first modification is addition of the 15-carbon isoprene, farnesyl, to a Cys residue near the carboxy-terminus of Ras. Prenylation allows the Ras oncoprotein to localize to the plasma membrane where it can initiate downstream signalling events leading to cellular transformation. Inhibitors of the enzyme which catalyzes this step, farnesyl protein transferase (FPT), are a potential class of novel anticancer drugs which interfere with Ras function. SCH 59228 is a tricyclic FPT inhibitor which inhibits the farnesylation of purified Ha-Ras with an IC50 of 95 nM and blocks the processing of Ha-Ras in Cos cells with an IC50 of 0.6  M. SCH 59228 has favorable pharmacokinetic properties upon oral dosing in nude mice. The in vivo efficacy of SCH 59228 was evaluated using a panel of tumor models grown in nude mice. These included several rodent fibroblast lines expressing mutationally-activated (val12) forms of the Ha-Ras oncogene. In some cases, these proteins contain their native C-terminal sequence (CVLS) which directs farnesylation. In one model, the C-terminal sequence was altered to CVLL, making the expressed protein a substrate for a distinct prenyl transferase, geranylgeranyl protein transferase-1. When dosed orally at 10 and 50 mg/kg (four times a day, 7 days a week) SCH 59228 significantly inhibited tumor growth of cells expressing farnesylated Ha-Ras in a dose-dependent manner; over 90% growth inhibition was observed at the 50 mg/kg dose. Tumor growth of cells expressing the geranylgeranylated form of Ha-Ras was less potently inhibited. Growth of tumors derived from a rodent fibroblast line expressing activated Ki-Ras containing its native C-terminal sequence (CVIM), which preferentially directs farnesylation, was also inhibited by SCH 59228. Inhibition in the Ki-Ras model was less than that observed in the Ha-Ras model. In contrast, tumors derived from cells transformed with the mos oncogene were not significantly inhibited even at the highest dose level. SCH 59228 also significantly and dose-dependently inhibited the growth of human colon adenocarcinoma DLD-1 xenografts (which express activated Ki-ras). These results indicate that SCH 59228 possesses in vivo antitumor activity upon oral dosing in tumor models expressing activated ras oncogenes. This is the first report of oral antitumor activity with an FPT inhibitor. These results are discussed in light of recent observations on alternative prenylation of some Ras isoforms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002800050862
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  • 4
    Electronic Resource
    Electronic Resource
    A Ras protein from a phytopathogenic fungus causes defects in hyphal growth polarity, and induces tumors in mice (1999)
    Springer
    Molecular genetics and genomics 262 (1999), S. 46-54 
    Details
    ISSN: 1617-4623
    Keywords: Key wordsColletotrichum trifolii ; Growth polarity ; Ras ; Signal transduction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Ras is a low-molecular-weight guanine nucleotide (GDP/GTP)-binding protein that transduces signals for growth and differentiation in eukaryotes. In mammals, the importance of Ras in regulating growth is underscored by the observation that activating mutations in ras genes are found in many animal tumors. Colletotrichum trifolii is a filamentous fungal pathogen of alfalfa which causes anthracnose disease. To investigate signaling pathways that regulate growth and development in this fungus, a gene encoding a Ras homolog (CT-Ras) was cloned from C. trifolii. CT-Ras exhibited extensive amino acid similarity to Ras proteins from higher and lower eukaryotes. A single amino acid change resulting in mutationally activated CT-Ras induced cellular transformation of mouse (NIH 3T3) fibroblasts and tumor formation in nu/nu mice. In Colletotrichum, mutationally activated CT-Ras induced abnormal hyphal proliferation and defects in polarized growth, and significantly reduced differentiation in a nutrient-dependent manner. These results show that C. trifolii Ras is a functional growth regulator in both mammals and fungi, and demonstrate that proper regulation of Ras is required for normal fungal growth and development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380051058
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  • 5
    Electronic Resource
    Electronic Resource
    Proteins of the Ras pathway as novel potential anticancer therapeutic targets (1999)
    Springer
    Cell biology and toxicology 15 (1999), S. 345-358 
    Details
    ISSN: 1573-6822
    Keywords: Ras ; GTPase ; oncogenesis ; signal transduction ; anticancer drugs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Ras proteins are molecular switches that constitute a pivotal element in the control of cellular responses to many incoming signals, and in particular mitogenic stimulations. They act through multiple effector pathways that carry out the biological functions of Ras in cells. Since mutations that constitutively activate Ras proteins have been found in a high proportion of human malignancies and participate in oncogenesis, a number of therapeutic anticancer strategies aimed against the activity or action of Ras proteins have been developed. This paper reviews the principal aspects of the Ras signaling pathway and describes some of the attempts to develop antitumor drugs based on this concept.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007645631013
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  • 6
    Electronic Resource
    Electronic Resource
    Masthead (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999) 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330101
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  • 7
    Electronic Resource
    Electronic Resource
    Projektionsversuche mit dem Diaprojektor (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 45-50 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A variety of demonstration experiments can be shown to a large audience with a minimum amount of chemicals by using an ordinary slide projector and easily mounted cuvettes. A detailed instruction for assembling the cuvettes is given as m d l as examples for suitable demonstration experiments in general, inorganic, organic and physical chemistry.
    Additional Material: 21 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330106
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  • 8
    Electronic Resource
    Electronic Resource
    Wer und was ist es? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 61-61 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330111
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  • 9
    Electronic Resource
    Electronic Resource
    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 66-66 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330114
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  • 10
    Electronic Resource
    Electronic Resource
    Rückblick (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 67-67 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330117
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  • 11
    Electronic Resource
    Electronic Resource
    Masthead (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999) 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330201
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  • 12
    Electronic Resource
    Electronic Resource
    Umweltprobenbanken-eine wichtige Säule der Umweltbeobachtung (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 95-103 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Natural events as well as human activities are affecting the environment and even with largescale monitoring programs it is not possible to completely assess the state of the environment. But a documentation of the environmental status with respect to its chemical composition can be realized with systematically collected representative environmental samples, which can be stored for decades at very low temperatures almost without degradation. Such ‘banking activity’ allows a current environmental monitoring and also a retrospective analysis for the determination of components which have not been analyzed at the time of sampling because of ta lack in analytical techniques or because they have not been known or considered environmentally relevant. The concept of environmental specimen banking and general procedures are described. Various examples illustrate the many facets of such activities.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330205
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  • 13
    Electronic Resource
    Electronic Resource
    Jobsuch auf dem Internet (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 128-128 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Arbeitsmarktsituation in der Chemie hat sich in den letzten Jahren spürbar entspannt. Dennoch gibt es auf etlichen, nicht hundertprozentig dem Trend der Zeit entsprechenden Spezialgebieten immer noch einen beträchtlichen Überhang an Stellensuchenden. Entsprechende Mobilität vorausgesetzt, kann das Internet bei der Stellensuche hilfreich sein.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330210
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  • 14
    Electronic Resource
    Electronic Resource
    Rückblick (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 135-135 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330215
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  • 15
    Electronic Resource
    Electronic Resource
    Masthead (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999) 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330301
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  • 16
    Electronic Resource
    Electronic Resource
    Quantenchemie auf dem Internet (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 165-166 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330306
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  • 17
    Electronic Resource
    Electronic Resource
    Die Rolle des Aerosols im Klimasystem (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 158-164 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Atmospheric aerosol particles cause one of the largest uncertainties in estimates of human influence on climate - a good reason to take a closer look at the atmospheric life cycle of the aerosols and its effects. Besides a number of primary and secondary natural aerosol sources we need to consider since the beginning of industrialisation strong manmade particle sources. During its residence in the atmosphere the aerosol interacts in many physical and chemical ways with other atmospheric trace substances, most importantly with water vapor and its liquid and solid phases. Through its direct effect on solar and thermal radiation and through its influence on clouds the atmospheric aerosol exerts a climate forcing. To data we cannot predict the ensuing climate response because of our limited understanding of essential atmospheric processes and of the many possible feedbacks within the climate system. However, already our present knowledge of the role of the atmospheric aerosol in the climate system makes strictly global views of anthropogenic climate changes questionable.
    Notes: Der Stand unseres Wissens zum Kreislauf des Atmosphärischen Aerosols und von seiner Rolle im Klimasystem läßt sich wie folgt zusammenfassen: 1Unser Verständnis des globalen Aerosolkreislaufs und vor allem des menschlichen Eingriffs in denselben ist noch sehr unvollständig. Dies gilt in hohem Maße auch für die mit diesem Kreislauf verbundenen chemischen Mehrphasenprozesse.2Ein negativer direkter Klimaantrieb anthropogener Aerosole existiert über die Streuung und Absorption, hat aber noch große Unsicherheiten und kann über hoch mit Rußpartikeln belasteten Gebieten auch positive Werte annehmen.3Ein indirekter Klimaantrieb anthropogener Aerosole existiert wahrscheinlich und hat ebenfalls ein negatives Vorzeichen. Seine Größenordnung und Unsicherheiten lassen sich noch nicht quantifizieren.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330305
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  • 18
    Electronic Resource
    Electronic Resource
    Welche Bedeutung haben Theoretische Konzepte in der Chemie? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 177-185 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemical concepts are important to gain a qualitative understanding of chemistry. They are needed to find interesting questions to which experimental research as well as quantum-chemical investigations and computer simulations can contribute. We point out why chemical concepts should be seen as an important and from fundamental physical theories to a certain degree independent part of chemistry. An overview and analysis of some concepts - which are often introduced only in connection with special examples instead of a discussion for their own sake - are given. We take a closer look at some concepts to illustrate our assertions. An analysis of the stability of the cyclic (MoNL3)-trimer demonstrates how these concepts work and what they can tell us about this special case.
    Notes: Wir haben versucht, deutlich zu machen, wie wichtig theoretische Konzepte in der Chemie sind. Dabei gelangen wir zu folgenden Schlußfolgerungen über die Konzepte, die in der Chemie herangezogen werden, um Beobachtungen zu deuten und zu verstehen: Qualitativ chemische Konzepte sind für ein Verständnis der Chemie unverzichtbar. Eine quantenchemische Berechnung liefert nicht automatisch Verständnis und Einordnung in einen Gesamtzusammenhang.Erst die vereinfachende Beschreibung chemischer Konzepte ermöglicht eine unmittelbare Diskussion chemischer Fragestellungen.Die Konzepte sind trotz grundlegender physikalischer Theorien bis zu einem gewissen Grade eigenständig.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330312
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  • 19
    Electronic Resource
    Electronic Resource
    Masthead (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999) 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330401
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  • 20
    Electronic Resource
    Electronic Resource
    Hundert Jahre Aspirin® (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 213-220 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The article commemorates the centenary of the protection of the proprietary mine of Aspirin. The early medicinal uses of salicylic acid derivatives in herbal remedies arc summarised as well as the biosynthesis of these derivatives. The history of the synthesis of salicylic acid and of acetyl salicylic acid (ASS) is described in detail as is the discovery of additional therapeutic applications and the basic pharmacology of ASS.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330406
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  • 21
    Electronic Resource
    Electronic Resource
    Internet-Werkzeuge für die Zusammenarbeit zwischen Chemikern (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 234-235 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330409
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  • 22
    Electronic Resource
    Electronic Resource
    Alchemie. Lexikon einer hermetischen Wissenschaft. Herausgegeben von Claus Priesner und Karin Figala. Verlag C. H. Beck, München 1998. 412 S., 40 Abb., Leinen, DM 68,-. ISBN 3-406-44104-8 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 239-240 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330412
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  • 23
    Electronic Resource
    Electronic Resource
    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 246-246 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330417
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  • 24
    Electronic Resource
    Electronic Resource
    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 250-250 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330502
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  • 25
    Electronic Resource
    Electronic Resource
    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 308-309 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330508
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  • 26
    Electronic Resource
    Electronic Resource
    Wer und was ist es? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 312-312 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330511
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  • 27
    Electronic Resource
    Electronic Resource
    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 314-314 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330514
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  • 28
    Electronic Resource
    Electronic Resource
    Literaturkarusell. Chemie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. IX 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330518
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  • 29
    Electronic Resource
    Electronic Resource
    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 318-318 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330602
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    Chemische Biologie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 354-358 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemical Biology is a rapidly growing field at the interface of organic chemistry and cell biology. Chemical strategies are used to address biological questions not amenable to traditional genetic and biochemical techniques alone. Thc enormous potential of Chemical Biology is illustrated by four recent examples.
    Notes: Chemische Biologie ist eine junge Forschungsrichtung im Grenzgebiet zwischen Organischer Cherme und Zellbiologie, welche aus einem Bedarf nach neuen Techniken zur Untersuchung zellbiologischer Mechanismen entstanden ist. Chemische Methoden werden mit biochemischen und molekularbiologischen Methoden kombiniert, um neuartige Möglichkeiten für die biologische Grundlagenforschung zu schaffen. So werden synthetische Oligosaccharide kovalent an die Oberfläche lebender Zellen gebunden, die Konzentration von Calciumionen im Zytosol künstlich reguliert und Rezeptoren künstlich aktiviert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330606
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  • 31
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    Elektrosynthesen. Strom doppelt genutzt: Erste technische „Paired Electrosynthesis“ (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 373-374 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Eine neue Elektrosynthese erfüllt erstmals den Traum der Elektrochemiker, gleichzeitig Anoden- und Kathodenreaktion für organische Synthesen technisch zu nutzen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330610
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  • 32
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    Electronic Resource
    Experimente für die Chemie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 377-377 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330614
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  • 33
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    Persistenz und Reichweite von Umweltchemikalien. Von M. Scheringer. Wiley-VCh, Weinheim 1999.XIII + 208 Abb.,17Tab., gebunden, DM 158,-.ISBN 3-527-29752-9 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 380-380 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330618
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  • 34
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    Vorbereitungen für die Jahrtausend-Party (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 382-384 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Around the world, BASF has been preparing for Y2K since 1996. The Information services and the Process Control Technology divisions, as well as embedded systems and logistics, not to mention the company's customers and suppliers have all been systenmatically tested for Y2K capability. In addition, special precautionary measures in particular, at large Verbund sites - will be in place during the switchover period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330621
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  • 35
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    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 4-4 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330102
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  • 36
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    Andere iu Z-Zeitschriften (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 66-66 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330115
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  • 37
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    Gentechnik in der Schule (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 104-109 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Fonds of German Chemical Industry (FCI) has produced an instrumental kit named „Blue Genes“ which enables High School teachers to perform in their school environment basic experiments of gene analysis and cloning. In particular, the kit contains all necessary equipment and reagents to perform a restriction analysis, and cloning and expression of a bacterial gene.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330206
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  • 38
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    Electronic Resource
    Chemie der Wunder (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 152-157 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A few physical phenomena believed to be religious miracles are considered, and scientific explanations for them are proposed.
    Notes: Einige physikalische Phänomene, von denen man glaubte, sie seien religiöse Wunder, werden vorgestellt und wissenschaftliche Erklärungen hierfür vorgeschlagen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330304
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  • 39
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    Wer und was ist es? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 173-173 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330308
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  • 40
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    Lebensgeschichten. Sternstunden der frühen Chemie von Johann Rudolph Glauber bis Justus von Liebig. Von Ernst F. Schwenk. Beck'sche Reihe 1252, Verlag C. H. Beck, München 1998. 288 S., 42 s/w-Abb., Paper-back, DM 19,80. ISBN 3-406-42052-4 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 176-176 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330311
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  • 41
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    Literaturkarusell. Interdisziplinäres (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. VIII 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330517
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  • 42
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    Literaturkarusell. Pharmazie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. XIV 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330520
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  • 43
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    Kupfer  -  Die biochemische Bedeutung eines Metalls (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 334-341 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The essential trace element copper plays a key role in living systems. Its metalloproteins are involved in various reactions. The IT ononuclear blue copper type-1 proteins take, part in electron transfer processes. Type-2 proteins can either act as oxidases, oxygenases, dioxygenases, or superoxide dismutases, containing one copper core. Dinuclear copper centers of Type-3 proteins are the oxygen transport system hemocyanin, oxidases and oxygenases. Due to this variety of functions copper deficiency and also abundance can cause severe damage of any life form.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330604
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  • 44
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    Fritz Haber, Carl Bosch und Friedrich Bergius  -  Protagonisten der Hochdrucksynthese (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 359-364 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: It is tried to fix the limits between the notions high pressure synthesis and high temperature chemistry. The work of Fritz Haber to apply high pressure to synthetise ammonia and of Friedrich Bergius to liquify coal to synthetise petrol is described. Special attention is given to the merits of Carl Bosch and his coworkers at BASF for applying the high pressure synthesis into industrial scale. The consequences of thc work of Haber, Bergius und Bosch on chemistry, social and political life and their importance for the present are considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330607
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  • 45
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    Bakterien, Viren, Prionen (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 376-376 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330613
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  • 46
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    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 390-390 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330622
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  • 47
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    Von Biomineralien zu biomimetischen Materialien: Der Weg ist das Ziel (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 6-19 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Diatoms are unicellular organisms which possess a unique silicified cell wall. Their intricate structures have inspired the imagination of naturalists and scientists throughout centuries. However, molecular biological details about silica metabolic pathways still are obscure. To find out how soft matter can selforganize and create finite solid shapes and complex patterns is certainly one of the most challenging scientific problems today. Especially chemists just have started to unravel the mysteries of chemical morphogenesis.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330103
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  • 48
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    Electronic Resource
    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 58-60 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330108
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  • 49
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    Chemie im Selbststudium. Grundkurs Chemie I. Allgemeine und Anorganische Chemie. Von Arnold Arni. überarb. Aulf. 3., überarb. Aufl., WILEY-VCH, Weinheim 1998. XIV + 350 S., 66 Abb., 15 Tab., Broschur, DM 54,-. ISBN 3-527-29542-9. Grundkurs Chemie II. Organische Chemie. 2., überarb. Aufl. WILEY-VCH, Weinheim 1998. XIII + 198 S., 16 Abb., 5 Tab., Broschur, DM 48,-. ISBN 3-527-29562-3 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 60-61 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330110
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  • 50
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    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 66-66 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330116
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    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 70-70 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330202
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 122-125 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330208
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  • 53
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    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 134-134 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330212
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  • 54
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    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 134-134 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330214
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  • 55
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    Literaturkarusell. Chemie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. X 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330218
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  • 56
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    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 138-138 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330302
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  • 57
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    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 174-175 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330309
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    Chemie mit Licht. Photochemie. Von D. Wöhrle, M.W. Tausch und W.-D. Stohrer. WILEY-VCH, Weinheim 1998. XVI, 253, S., 169 Abb., 39 Tab., Broschur, DM 128,-.ISBN 3-527-29545-3 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 175-176 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330310
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    Editorial (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 190-190 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330402
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    Sandwich-artige Cyclopentadienylkomplexe von Hauptgruppenelementen (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 342-353 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cyclopentadienyl (Cp) complexes of maingroup elements are classified and compared in terms of structural types, bonding features, and characteristic reactions. Halfsandwich, sandwich and multidecker sandwich arrangements of different type are observed including cluster species with weak or strong metal-metal bonds. The Cp-El bonding ranges from mainly covalent to purely ionic with important structure-determining intermolecular contacts in the latter. π-Complexation allows the stabilisation of compounds with low-valent elements such as AI(I), Ga(I), and Si(I1). Important reaction principles and applications are shortly described.
    Additional Material: 19 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330605
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 367-372 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330608
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    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 375-375 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330612
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    Schreiben und publizieren in den naturwissenschaften. Vin H.F.Ebel u C. Bliefert. 4., völlig neu bearb. Aufl., WILEY-VCh, Weinheim 1988.XIV + 550 s., Broschur, Dm 68,-ISBN 3-527-29626-3 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 378-379 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330615
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    Wer war es? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 381-381 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330620
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  • 65
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    Andere iu Z-Zeitschriften (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 390-390 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330623
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 53-58 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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    URL: http://dx.doi.org/10.1002/ciuz.19990330107
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    Koffeinschub für Chemie-Applets im WWW (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 62-63 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330112
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  • 68
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    Wer war es? (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 129-129 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330211
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  • 69
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    Andere iu Z-Zeitschriften (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 134-134 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330213
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  • 70
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    Literaturkarusell. Biologie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. V 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330216
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  • 71
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    Literaturkarusell. Physik (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. VIII 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330217
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  • 72
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    Electronic Resource
    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 186-186 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330315
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  • 73
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    Electronic Resource
    Methyltrioxorhenium (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 192-198 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330403
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  • 74
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    Electronic Resource
    Molekulare Aspekte des Alterns (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 221-225 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In the last decade, major advances in the understanding of the biology of aging were made. Studies in worms, flies and yeast led to the identification of several life-extending genes. In mammals, two genes were found which, when mutated, shorten life span. Previous studies in rodents reporting life span prolongation by caloric restriction were confirmed and extended to lower organisms. The studies arc consistent with and supportive of the free radical theory of aging, which secs reactive oxygen species as the main contributor to aging. A refinement of this theory puts mitochondrial DNA into the center of the aging process. It appears that mitochondrial DNA may be both, a yardstick for the biological age and a signalling device to tell the organism when to die. A diet low in calories and high in antioxidants promises to lead to a better quality of life at old age and possibly to increased life span for humans.
    Additional Material: 2 Tab.
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    URL: http://dx.doi.org/10.1002/ciuz.19990330407
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  • 75
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    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 237-239 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330411
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  • 76
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    Radikale und Radikalionen in der Organischen Synthese. Von Torsten Linker und Michael Schmittel. WILEY-VCH, Weinheim 1998. 421 S., DM 88,-. ISBN 3-527-29492-9 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 241-241 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330415
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  • 77
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    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 247-247 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330419
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  • 78
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    Electronic Resource
    Wiederaufladbare Batterien (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 252-266 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This first part of „Rechargeable Batteries“ is devoted to materials and reactions in batteries with aqueous electrolytes. Lead-acid, nickelcadmium, nickel-metal hydride, and various zinc systems, such as zinc-manganese oxide, zinc-air, and zinc-bromine cells are discussed. Special attention is paid to the limited electrochemical stability window of the aqueous electrolytes, which enables overcharge and overdischarge protection of the battery but limits cell voltages to less than 2 Volts. In the following part of this article we will focus on nonaqueous electrolyte-based rechargeable batteries. Due to thc wider electrochemical stability window of these electrolytes high specific charge and high cell voltage batteries can be realized, e.g., the „4 V“ lithium ion cell.
    Additional Material: 19 Ill.
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    URL: http://dx.doi.org/10.1002/ciuz.19990330503
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  • 79
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 304-308 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330507
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  • 80
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    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 314-314 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330512
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  • 81
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    Chemie erlebt - 50 jahre GDCH. Hrsg. von der Gesellschaft Deutscher Chemiker. Das Buch ist im Eigenverlag erschienen und kann bei der Gesellschaft Deutscher Chemiker, Abteilung Öffentlichkeitsarbeit, Postfach 900440,60444 Frankfurt/M bestellt werde,304 S., Dm 39,-ISBN 3-924763-79-8 (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 379-380 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330616
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  • 82
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    Impressum (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 390-390 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330624
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  • 83
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    Feste Lösungen (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 33-44 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Solid solutions arc an area of inorganic chemistry that encompasses a wide variety of natural and synthetic compounds. This article is intended to be a selection of interesting examples which illustrate the importance of solid solutions in everyday life and industrial applications. A short discussion of the theoretical background is given, followed by the description of solid solutions of non-metals in metals such as steel. Furthermore, solid solutions with important optical (e.g. laser materials) and electrical properties (e.g. β-alumina) are discussed, referring to their chemical structure and technological relevance.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330105
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  • 84
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    ChiuZ aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 126-127 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330209
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  • 85
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    Primärprozesse der Photosynthese und ihre Modellierung (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 72-83 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Photosynthesis is one of the most fascinating fields of current interdisciplinary research. It seems miraculous that Nature, in the process of evolution, has managed to bring about a 100% quantum yield in charge separation occurring in the primary processes within the photosynthetic reaction centers. In fact, wasteful deactivation of the photoexcited electronic states into the ground state should be favoured and thus prevent charge separation. Biomimetic model compounds have been synthesized, essentially from porphyrins and quinones, resembling the redoxactive cofactors, Nature has developed. The underlying philosophy of this approach is to design and prepare suitable organic molecules allowing the specific properties of the complex electron transfer reactions to be tuned appropriately. Special emphasis is given the through comparison of structures and functions of native and artificial systems. The prominent electron transfer characteristics are discussed in particular by using time-resolved picosecond fluorescence and time-resolved EPR techniques.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330203
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  • 86
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    Literaturkarusell. Pharmazie (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. XI 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330219
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  • 87
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    Literaturkarusell. Inter-disziplinäres (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. XIII 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330220
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  • 88
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    Biochemische Mechanismen einer einfachen Verhaltensreaktion (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 140-151 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In active search for conditions for optimal phototrophic growth, halobacteria respond to light and to a variety of other environmental stimuli by taxis. Light reception is mediated by sensory rhodopsins, seven helix transmembrane retinal proteins that are stably complexed to specific MCP-related transducer proteins. Photoisomerization of the retinal chromophore generates a steric signal which activates the sensory rhodopsin-transducer-complex. Complex activation is relayed to a two component signaling system and transiently changes the cytoplasmic concentration of fumarate which, together with the small cytoplasmic protein CheY controls flagellar motor switching. Dual signaling by CheY and fumarate was also found in Escherichia coli where it mediates metabolic signaling and taxis in cells with disabled two-component system. Sensory integration of different environmental stimuli occurs at the level of the signaling domains of several stimulus-specific transducers constructed through combination of appropriate molecular modules. Irrespective of the complexity of the signaling network, the response to light is quantitatively predictable and stochastic. Its kinetic analysis suggests that time-dependent changes in the activity of signaling components can be resolved even in the context of a complex molecular network.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330303
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  • 89
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 167-172 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330307
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  • 90
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    Dokumentation (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 186-186 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330313
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  • 91
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    Rückblick (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 187-187 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330316
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  • 92
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    Wissenschaft aktuell (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 228-233 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330408
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  • 93
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    Wiederaufladbare Batterien (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 320-332 
    Details
    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As a matter of fact, most of our technical electrochemical energy storage systems operate outside the limitations of thermodynamics. As in the case of rechargeable batteries with aqueous electrolytes (part I of this article), kinetics control the operation and safety also in batteries with nonaqueous electrolytes (this second and final part).A striking example is the lithium ion battery which possesses an operating voltage of 〉3,5 V and a very high energy density. From a thermodynamic viewpoint such a cell is impossible because the used organic electrolyte is in contact with two lithium insertion electrodes that operate at extreme reducing and oxidizing potentials, respectively. However, a unique mechanism kinetically prevents the decomposition of the electrolyte due to the formation of electronically insulating interphases between electrode and electrolyte that are still permeable to the electrochemically active Li+ cations. Lithium ion batteries have already made their breakthrough into the market as small format systems for portable electronics. The only „kinetically shielded“ high energy density, however, might be a safety complication for large format batteries, which are assembled for electric vehicle (EV) propulsion. Safety concerns are also valid for high temperature (300°C) batteries such as the sodium-sulfur and sodium-nickel chloride systems. These systems are still in the stage of „experimental batteries“, which may find future application in large units for EV's or uninterruptible power systems. The paper is concluded by a performance comparison of various rechargeable battery systems with aqueous and nonaqueous electrolytes. (Possible) applications in consumer electronics and EV's are discussed in more detail.
    Additional Material: 13 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330603
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  • 94
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    Pflanzeninhaltsstoffe. Chemische Abschreckung von Fraßinsekten (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 372-372 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330609
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  • 95
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    Rückblick (1999)
    Weinheim : Wiley-Blackwell
    Chemie in unserer Zeit 33 (1999), S. 391-391 
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    ISSN: 0009-2851
    Keywords: Chemistry ; Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ciuz.19990330625
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  • 96
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    Farnesyl Protein Transferase Inhibitors and Other Therapies Targeting the Ras Signal Transduction Pathway (1999)
    Springer
    Investigational new drugs 17 (1999), S. 241-258 
    Details
    ISSN: 1573-0646
    Keywords: Ras ; Raf kinase ; MEK ; farnesyl protein transferase (FPT)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Abstract The year 2000 will be a significant date for the field of Ras-related therapies since numerous agents will have Phase II clinical efficacy data maturing to provide proof of principle for this cancer treatment strategy. These data will also provide an important milestone for the cancer research community since these molecules represent a small vanguard of oncology drug discovery projects predicated on molecular targets. We can only hope that these agents are a successful harbinger for the formidable number of targeted therapies that will be entering development pipelines in the coming years.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006380320290
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  • 97
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    Potassium channels as targets for modulating cell growth and differentiation (1999)
    Springer
    Perspectives in drug discovery and design 15-16 (1999), S. 295-311 
    Details
    ISSN: 1573-9023
    Keywords: mitogenic signaling ; proliferation ; Ras ; receptor tyrosine kinase ; Src
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Potassium channels, especially small and intermediate conductance KCa channels, have important roles in controlling cell proliferation and differentiation. Thus far regulation of these channels is reported to be primarily at the level of expression, in response to activation of the central growth regulatory signaling pathway (i.e., growth factor receptor tyrosine kinase/Ras/Raf/MEK/ERK). Therefore, the function and regulation of these cell growth-associated channels must be viewed differently from that of channels which govern electrical signaling in excitable cells, and which are typically studied in terms of their transient modulation by G-protein coupled receptors. Although there are suggestions that potassium channels also contribute to growth regulation in excitable cells, a coherent picture of this role in these systems is still emerging. For fibroblasts and T-lymphocytes, it is clear that growth factor and oncogenic upregulation of a unique KCa channel (or possibly KCa channel class) is stimulatory for cell proliferation and activation, respectively. This mitogenic channel has a single channel conductance in the range of 33–39 pS, it is charybdotoxin-sensitive and apamin-insensitive, and its gating is voltage-independent. Recent cloning data suggest that the KCa channel (or channel class) described for fibroblasts and T-cells has a widespread distribution in other mitogenically active (non-neuronal) tissues. A number of studies are now underway to understand the physiology, pharmacology and regulation of this channel. Further, it is now critical to determine how KCa activity integrates into the signaling pathways which convey growth regulatory information from the cell membrane, to the nucleus, and then to the ultimate effectors for cell proliferation or differentiation. It has also become apparent that these growth regulatory signaling systems interact with other channel types, affecting channel densities at the level of expression, and channel activities at the level of gating modulation. Therefore, it seems most appropriate to view ion channel function in the context of how it contributes to and is affected by both cell growth activity, and the biochemical signaling systems linked to growth control.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017053215745
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  • 98
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    Photochemistry of 9,10-Dicarbonyl-9,10-dihydroanthracene - A Source of 9,10-Dehydroanthracene? (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 57-60 
    Details
    ISSN: 1434-193X
    Keywords: Benzyne ; Dehydroanthracene ; Matrix isolation ; Photochemistry ; Bergman reaction ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -9,10-Didehydroanthracene (1) is an interesting derivative of p-benzyne that has been subject of several studies. In contrast to an earlier report, the photochemical decarbonylation of 9,10-dicarbonyl-9,10-dihydroanthracene (2) does not lead to 1 but rather to the ring-opened ene-diyne 4. The key intermediate for this reaction is keto carbene 7 which is formed by monodecarbonylation of 2. Carbene 7 is labile towards visible-light irradiation and easily looses the second CO molecule to give 4. Carbene 7 and diyne 4 are characterized by IR and UV/Vis spectra, the IR spectra are compared to calculations at the B3LYP/6-31G(d,p) level of theory.
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    Reversal Diastereofacial Selectivity in the n-Butyllithium Addition to O-Protected N-Trimethylsilylimines of (2S)-Lactal: Enthalpic versus Entropic Contributions (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 61-65 
    Details
    ISSN: 1434-193X
    Keywords: Nucleophilic addition ; Solvent effect ; Reversal of diastereoselectivity ; Temperature effect ; Imines ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -Commonly observed, but rarely explored, is the possibility of modifying the diastereomeric excess (de%) by means of temperature. A complete reversal in the diastereofacial selectivity could be obtained whenever the diastereoisomers concerned are differentially favored by enthalpy and entropy. The enthalpic or entropic dominance of a diastereoisomer depends greatly on the reaction solvent used.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 100
    Electronic Resource
    Electronic Resource
    Syntheses of Donor-Acceptor-Substituted 2,6-Stellanes (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 73-81 
    Details
    ISSN: 1434-193X
    Keywords: Donor-acceptor systems ; Cage compounds ; Stelladione ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: -A number of condensations could be carried out using tricyclo[3.3.0.03,7]octane-2-one (stellanone, 4) and tricyclo[3.3.0.03,7]octane-2,6-dione (2,6-stelladione, 5) as starting materials. The components for condensations were 2-trimethylsilyl-1,3-dithiane (6), 1,1-bis(trimethylsilyl)-1H-cyclopropa[b]naphthalene (7), its 3,6-dimethoxy-substituted analogue 8, fluorene (12), xanthene (13), diethyl malonate (14), and malononitrile (15). The condensation reactions with 5 yielded mono- and disubstituted products, among them were the donor-acceptor-substituted 2,6-stellanes 33-35. The structures of 18 (prepared from stellanone and fluorene), 19, 24, 27, 31 and 32 (synthesized by condensation of 2,6-stelladione and 2-trimethylsilyl-1,3-dithiane and malononitrile, respectively) were determined by X-ray crystallography.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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