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  • 1
    Electronic Resource
    Electronic Resource
    Multiple bonds between transition metals and main-group elements. 124. Structures and reactivity of acylperrhenates (1993)
    s.l. : American Chemical Society
    Inorganic chemistry 32 (1993), S. 5188-5194 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00075a041
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  • 2
    Electronic Resource
    Electronic Resource
    Multiple Bonds between Main-Group Elements and Transition Metals. 130. (Cyclopentadienyl)trioxorhenium(VII): Synthesis, Derivatives, and Properties (1994)
    s.l. : American Chemical Society
    Organometallics 13 (1994), S. 1601-1606 
    Details
    ISSN: 1520-6041
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/om00017a017
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  • 3
    Electronic Resource
    Electronic Resource
    Multiple bonds between main-group elements and transition metals. 113. Simple and efficient synthesis of methyltrioxorhenium(VII): a general method (1992)
    s.l. : American Chemical Society
    Inorganic chemistry 31 (1992), S. 4431-4432 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00047a037
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  • 4
    Electronic Resource
    Electronic Resource
    Studies on cadmium localization in the water fern Azolla (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 79 (1990), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Uptake of cadmium by the water fern Azolla filiculoides (Lamarck) was characterized, and the localization of the metal in the roots and shoots as well as its effects on some essential elements were studied. Cadmium was accumulated at a rapid rate in Azolla plants within 1 h and then more gradually up to 77 h. Cadmium content was increased in the inner epidermis, cortex and bundle cell walls of the root between 33 and 77 h. This accumulation was characterized by the appearance of small dark grains with high content of cadmium, phosphate and calcium along the epidermal cells. The shoots of Azolla plants grown in the presence of cadmium showed high content of cadmium only in the ventral lobe submerged in the growth medium, suggesting that cadmium was absorbed directly from the medium. The effect of cadmium on essential elements in Azolla was characterized by simultaneous increases in calcium and cadmium content in the root and shoot and by decreases in magnesium content in the root and potassium content in the shoot.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1990.tb02116.x
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  • 5
    Electronic Resource
    Electronic Resource
    Autoradiography ofCoelopa frigida (Diptera) embryos, after labeling with3H-uridine during various phases of oogenesis (1976)
    Springer
    Development genes and evolution 180 (1976), S. 311-314 
    Details
    ISSN: 1432-041X
    Keywords: Autoradiography ; Nucleotides ; Embryogenesis ; Dipteran Oogenesis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of tritiated (3H) uridine or its derivatives in embryos of the kelp flyCoelopa frigida is analyzed by autoradiography. The radioactive label is introduced into the growing oocyte, after injectio into females at different time periods post eclosion. The majority of the label remains in the cytoplasm for the entire embryonic development and is presumably incorporated into stable RNA. Only when the precursor is injected toward the final stages of oogenesis, can presence of label be detected in the nuclei, for a short time period during the blastodern stage. Since no preferential location in nucleoli is found, it appears possible that labeled cytidine could have been derived from the original precursor which would be available for incorporation into DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00848777
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  • 6
    Electronic Resource
    Electronic Resource
    Interferon-α treatment in multiple myeloma: Meta-analysis of 30 randomised trials among 3948 patients (2000)
    Springer
    Annals of oncology 11 (2000), S. 1427-1436 
    Details
    ISSN: 1569-8041
    Keywords: cost-effectiveness ; induction ; interferon-α ; maintenance ; meta-analysis ; multiple myeloma ; overall survival ; relapse-free survival
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Background:After two decades of interferon (IFN) treatment inmyeloma patients and many randomised clinical trials, no definite proof of itsbenefits exists. This meta-analysis of all available relevant published datatests the differences between IFN and control arms in a large patientpopulation and addresses the issue of cost-effectiveness. Patients and methods:Meta-analysis was performed on 17 trialsamong 2333 patients who received IFN-chemotherapy induction treatment orchemotherapy alone and on 13 trials among 1615 patients on IFN maintenancetherapy or without treatment. Response rates and parameters of publishedKaplan–Meier relapse-free and overall survival curves were analysed. Results:Patients in IFN arms showed significantly better resultsin all investigated parameters: IFN-chemotherapy induction treatment yielded6.6% higher response rates (2P 〈 0.002) as well as4.8-month and 3.1-month prolongations of relapse-free (P 〈 0.01)and overall survival (P 〈 0.01), respectively. Interferonmaintenance therapy lead to 4.4-month (P 〈 0.01) and 7.0-month(P 〈 0.01) prolongations of relapse-free and overall survival,respectively. Meta-analysis of all IFN trials combined resulted in 4.6-monthand 3.7-month IFN-related gains in relapse-free and overall survival,respectively. As early as 6 and 12 months after the start of IFN treatment,percentages of cumulative relapse-free and overall survival were alwayssignificantly higher in IFN trial arms. IFN drug expenses for a one-yearsurvival gain, as determined from AUCs of best-fitted Gompertz functions ofIFN and control survival curves, were estimated to be US$42,482.28 forinduction therapy and US$18,968.16 for maintenance treatment. Conclusions:Significantly superior outcomes were consistentlyfound in IFN trial arms by meta-analysis of published data. These results arein accordance with a concomittantly conducted meta-analysis on individualpatient data but were much easier to accrue. Taking all our results intoaccount, i.e., the consistently significant, although limited, improvement ofclinical outcomes and its acceptable cost-effectiveness, IFN treatment ofpatients with multiple myeloma seems worthwhile to be considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026548226770
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  • 7
    Electronic Resource
    Electronic Resource
    Gold-Komplexe von Diphosphinomethanen, III. AuII-Verbindungen durch oxidative Addition von Halogen (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 2758-2764 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Gold Complexes of Diphosphinomethanes, III. AuII Compounds by Means of Oxidative Addition of HalogenOxidative addition of halogen to the 1:2 complexes of bis(diphenylphosphino)methane and -propane with AuCl (1a, 5) leads to products which are formulated partly as AuI/AuIII compounds (2a, b), but partly also as true AuII derivatives (6a, b). The addition of iodine to the AuI complex yields an adduct of the type 4. For the characterisation of the largely insoluble materials, infrared, Mössbauer, and ESCA spectroscopy have been employed.
    Notes: Durch oxidative Addition von Halogen an 1:2-Komplexe von Bis(diphenylphosphino)methan und -propan mit AuCl (1a, 5) entstehen Produkte, die teilweise als AuI/AuIII-Verbindungen (2a, b), teilweise aber auch als echte AuII-Derivate zu formulieren sind (6a, b). Die Anlagerung von Iod an den AuI-Komplex liefert nur ein Addukt vom Typ 4. Zur Charakterisierung der fast ausnahmslos unlöslichen Substanzen wurden die Infrarot-, Mössbauer-und ESCA-Spektroskopie herangezogen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771100811
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  • 8
    Electronic Resource
    Electronic Resource
    Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen, CXIV. Organorhenium(VII)-oxide (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 45-50 
    Details
    ISSN: 0009-2940
    Keywords: Rhenium compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Multiple Bonds between Main Group Elements and Transition Metals, CXIV.  -  Organorhenium(VII) OxidesAlkylrhenium(VII) oxides of formulae RReO3 and RReO3 · L (L = quinuclidine) result from dirhenium heptaoxide and dialkylzinc compounds at low temperatures in THF solution. Unbranched, noncyclic organorhenium oxides prove to be less thermolabile than branched-chain derivatives, with the thermal stability decreasing with increasing chain length. Complexes with branched carbon chains normally can be isolated as 1:1 adducts of a nitrogen base, e.g. quinuclidine. A first chiral alkylmetal oxide and base-stabilized cyclopropyltrioxorhenium(VII) are also described.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260108
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  • 9
    Electronic Resource
    Electronic Resource
    Chlorotrioxorhenium. Neue Synthesen, Reaktionen und Derivate (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 47-54 
    Details
    ISSN: 0009-2940
    Keywords: Rhenium compounds ; Thermogravimetry ; Organometallic Oxides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Multiple Bonds between Main Group Elements and Transition Metals, CXXIX[1].  -  Chlorotrioxorhenium. Novel Syntheses, Reactions, and DerivativesChlorotrioxorhenium (1a) and homologs of formula X-ReO3 (1b-e) are generated from Re2O7 and either ZnX2, (n - C4H9)3SnX, [(n-C4H9)4N]X, or [(C6H5)4P]X in clean reactions. Compounds 1a-f form with stable six-coordinate adducts XReO3 ·L (2a-f, 3a, 4a, 5a: L = N,N′-ligand) upon addition of the free ligand L, e.g. 2,2′-bipyridine. 1a is readily alkylated by means of SnR4 or ZnR2 to form organorhenium(VII) oxides in good yields. These synthetic routes have the advantage to proceed under very mild conditions. The adducts of 2,2′-bipyridine with halorhenium(VII) oxides show characteristic thermogravimetric (TG) behavior that reflects the volatility of the uncoordinated complexes X-ReO3.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270108
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  • 10
    Electronic Resource
    Electronic Resource
    Structural Studies and Catalytic Activity of MCM-41 and MCM-48 Modified With the Titanocenophane [SiMe2(η5-C5H4)2]TiCl2 (2000)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 2000 (2000), S. 551-557 
    Details
    ISSN: 1434-1948
    Keywords: Mesoporous materials ; MCM-41 ; MCM-48 ; Immobilisation ; Solid-state NMR ; Heterogeneous catalysis ; Titanium ; Titanocenes ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Titanium(IV)-grafted mesoporous silicas have been prepared by diffusion of an excess of the ansa-bridged titanocene [SiMe2(η5-C5H4)2]TiCl2 into the channels of hexagonal MCM-41 and cubic MCM-48 in dichloromethane or tetrahydrofuran at room temperature. The choice of solvent determines the course of the reaction and hence the activity of the resulting materials as catalysts in the catalytic epoxidation of cyclooctene with tert-butylhydroperoxide. Magic-angle spinning (MAS) NMR (13C, 29Si) spectroscopy was used to characterise the local environment of the surface-bound titanium active sites. When dichloromethane is used, the dominant species anchored to the surface are isolated ansa-bridged titanocene fragments. When THF is used, the [SiMe2(η5-C5H4)2] unit is lost with the concomitant formation of surface-bound TiIV species coordinated by THF molecules. These materials showed the best catalytic performance per Ti atom for the conversion of cyclooctene. All materials were further characterised by means of elemental analysis, powder X-ray diffraction (XRD), N2 adsorption and FTIR spectroscopy.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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