Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Organic Chemistry  (3)
  • Polymer and Materials Science  (3)
  • DNA hybridization  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Repeated sequence RSa is diagnostic for Bradyrhizobium japonicum and Bradyrhizobium elkanii (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 15-19 
    Details
    ISSN: 1432-0789
    Keywords: Key wordsBradyrhizobium japonicum ; Bradyrhizobium elkanii ; Repeated sequence RSα ; Polymerase chain reaction detection ; DNA hybridization ; Soil inoculant ; Nodulation tests ; N2 fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The genome of Bradyrhizobium japonicum and B. elkanii contains multiple copies of the repeated DNA sequence RSα. A collection of 18 B. japonicum, 4 B. elkanii and 72 other bacterial strains was screened by polymerase chain reaction (PCR) using a pair of primers specific for RSα. Only strains of B. japonicum and B. elkanii gave the predicted amplification product. Restriction analysis of PCR products obtained from different strains of B. japonicum showed that the RSα sequence was generally conserved. The usefulness of RSα as a specific probe for Bradyrhizobium strains capable of nodulating soybean was also demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335812
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Repeated sequence RSα is diagnostic for Bradyhizobium japonicum and Bradyrhizobium elkanii (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 15-19 
    Details
    ISSN: 1432-0789
    Keywords: Bradyrhizobium japonicum ; Bradyrhizobium elkanii ; Repeated sequence RSα ; Polymerase chain reaction detection ; DNA hybridization ; Soil inoculant ; Nodulation tests ; N2 fixation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The genome of Brahyrhizobium japonicum and B. elkanii contains multiple copies of the repeated DNA sequence RSα. A collection of 18 B. japonicum, 4 B. elkanii and 72 other bacterial strains was screened by polymerase chain reaction (PCR) using a pair of primers specific for RSα. Only strains of B. japonicum and B. elkanii gave the predicted amplification product. Restriction analysis of PCR products obtained from different strains of B. japonicum showed that the RSα sequence was generally conserved. The usefulness of RSα as a specific probe for Brahyrhizobium strains capable of nodulating soybean was also demonstrated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335812
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Aminoacyl-Einlagerung. 1. Mitteilung. Definition, Übersicht und Beziehung zur PeptidsyntheseHerrn Prof. Dr. T. Reichstein zum 60. Geburtstag gewidmet. (1957)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 40 (1957), S. 1497-1517 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Unter dem Namen Aminoacyl-Einlagerung wird ein neuer Umlagerungstypus beschrieben, welcher von O-aminoacylierten β-Hydroxysäureamiden zu β-Hydroxyacyl-aminosäureamiden führt. Die β-Hydroxysäure kann aliphatisch oder aromatisch sein. Da der Amidstickstoff substituiert sein darf, gestattet die Reaktion den Aufbau von Peptidketten. Peptide schienen bisher nur durch Aminoacyl-Anlagerungs-Reaktionen zugänglich zu sein. Die Aminoacyl-Einlagerungs-Reaktion weist einen prinzipiell neuen Weg.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19570400533
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Gemischte Anhydride aus Carbobenzoxy-Aminosäuren und Chlorameisensäure zur Veresterung von aromatischen und aliphatischen Hydroxyl-Verbindungen (1957)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 40 (1957), S. 604-610 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Einführung des N-Cbzo-α-Aminosäure-Restes in alkoholische und phenolische Hydroxylgruppen erfolgt einfach und zuverlässig mit Hilfe von Phosgen bei tiefen Temperaturen. Die „Phosgenmethode“ wird in einer Reihe von Beispielen beschrieben.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19570400315
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Synthese der Sequenz 1-34 von menschlichem Parathormon. Vorläufige MitteilungEine ausführliche Beschreibung soll später in dieser Zeitschrift erfolgen.Verwendete Abkürzungen: Boc-: t-Butyloxycarbonyl-; Bpoc-: 2-(p-Biphenylyl)-isopropyloxycarbonyl-[5]; But-: t-Butyl-; DCCI: Dicyclohexylcarbodiimid; HOBt: 1-Hydroxybenzotriazol; Trt-: Trityl-; Z-: Benzyloxycarbonyl-. (1973)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 56 (1973), S. 470-473 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Brewer et al. [1] have established sequence I for the first 34 amino acid residues of human parathyroid hormone. It differs in 6 and 5 positions respectively from the corresponding bovine [2] [3] and porcine [4] hormone sequences. The synthesis of the protected tetratriacontapeptide II by the fragment-coupling approach and its purification by counter-current distribution are described. Removal of the protecting groups by acidolysis then gave I in high purity.I displays hypercalcemic activity in the thyroparathyroidectomized rat indicating that the amino terminal part also constitutes the hormonally active region of human parathyroid hormone.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19730560139
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Influence of Copper Dopants on the Resistivity of ZnO Films (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 671-674 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Copper 2p3/2 x-ray photoemission spectroscopy (XPS) measurements and near-edge x-ray absorption spectroscopy (NEXAFS) studies of copper-doped ZnO thin films were carried out in order to understand the role of the dopants in increasing the film resistivity. c-Axis-oriented ZnO films (thickness 120 nm) were deposited by r.f. sputtering on Cr-coated SiO2/Si substrates and subsequently implanted with metallic copper (0.5 at.%). After implantation, XPS results indicated that the dopant consists of a mixture of Cu+ and Cu0. The c-axis film resistivity was found to decrease to 7×107 Ω · cm (prior to implantation: 5×1010 Ω · cm). Oxygen annealing resulted in complete oxidation of the dopants in the film surface and bulk (Cu2+) as indicated by XPS and bulk-sensitive fluorescence NEXAFS. The film resistivity increased to 2×1011 Ω · cm, which can be explained in terms of electron trapping by Cu 3d hole states of Cu2+. The NEXAFS results suggested that the copper dopants after oxygen annealing have preferred orientations in the ZnO matrix. Additional vacuum annealing reduced Cu2+ ions to Cu+, which demonstrated that the observed decrease in film resistivity from 2×1011-107 Ω · cm is due to the Cu+ oxidation state.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 7
    Electronic Resource
    Electronic Resource
    Investigation of the Interfacial Region Formed During ZnO Growth on Si(100) Substrate Using Single-source CVD (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 675-678 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The growth process of ZnO films on Si(100) by single-source chemical vapour deposition (CVD) was investigated. During the initial stages of growth (film thickness 〈30Å), oxidation of the Si substrate was observed which resulted in an interfacial region consisting of ZnO and Si oxides. For film thicknesses in excess of 40 Å the composition of the film approaches that of a continuous ZnO film. It is suggested that the mixed interfacial region strongly influences the adhesion of the film on the substrate by providing Zn-O-Si-type bonds. The oxidation of the substrate during the initial film growth may have direct implications on the type of contact layers that can be used in ZnO thin-film devices using single-source CVD techniques.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
  • 8
    Electronic Resource
    Electronic Resource
    Electronic Structure of Nd0.5Y0.5Ba2Cu3O7-δ Single Crystals (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 657-661 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The new bulk, melt-textured grown composite Nd0.5Y0.5Ba2Cu3O7-δ, which also forms large single crystals, has the standard high-Tc 123 orthorhombic structure when oxygenated and a very high critical current density in a magnetic field of 0.5 T. Both of these results were not anticipated, as the Nd and Y ions are significantly different in size, while the absence of Y211 and/or Nd422 precipitates within the 123 grains indicates that a new pinning mechanism is responsible for the highJc. A possible mechanism has been attributed in part to the partial substitution of Nd3+ in the Ba2+ site, but to further understand this material and to further optimize its processing route for application purposes, we have carried out an XPS study of its electronic structure using cleaved surfaces of single crystals. The data obtained are analysed and discussed in terms of that found for high-quality Re 123 single crystals where Re is either Nd or Y.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...