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  • 1975-1979  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Associative effect of inoculation of different strains of Azotobacter and homologous rhizobium on the yield of moong (Vigna radiata), soybean (Glycine max) and pea (Pisum sativum) (1979)
    Springer
    Plant and soil 53 (1979), S. 105-108 
    Details
    ISSN: 1573-5036
    Keywords: Association ; Azotobacter ; Rhizobium ; Legumes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary It has been observed that in the case ofVigna radiata andGlycine max incorporation of suitable strain of Azotobacter gave higher yield than obtained by the use of Rhizobium as inoculant. In the case ofVigna radiata even a strain of Azotobacter isolated from the rhizosphere of berseem gave similar yields as Rhizobium. In the case ofPisum sativum association of Rhizobium with a strain ofAzotobacter chroococcum isolated from the rhizosphere of pea gave numerically higher yield than Rhizobium alone. It may be possible that statistically higher yield may be obtained when a suitable strain of Azotobacter is used after screening a large number of strains of Azotobacter from the rhizosphere of pea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181884
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Racemization in the synthesis of sequential polypeptides using N-hydroxysuccinimide esters (1976)
    New York : Wiley-Blackwell
    Biopolymers 15 (1976), S. 1585-1590 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Racemization in the synthesis of peptide intermediates and their polymers was investigated, using L-amino acid oxidase. The formation of N-hydroxysuccinimide esters from N-protected peptide acids yielded optically pure products in contrast to p-nitrophenyl and pentachlorophenyl active esters. The racemization in the polymerization step was found to be base sensitive. Partially racemized polymer can result from optically homogeneous monomer. Thus, the optical integrity of active monomer species carries no guarantee for that of the polymer.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1976.360150812
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Racemization in the synthesis of polytripeptide models of collagen (1976)
    New York : Wiley-Blackwell
    Biopolymers 15 (1976), S. 317-324 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Racemization in the synthesis of tripeptide intermediates and their polymers was investigated, using L-amino acid oxidase. Stepwise investigation of peptide intermediates showed no racemization during peptide coupling steps or deprotection of benzyl esters by hydrogenolysis. Saponification of one of the methyl esters produced some racemization. Preparation of active esters from N-protected tripeptide acids containing optically active C-terminal amino acid, with one exception, produced racemization. The fractionated polymers were found to contain less racemized amino acids than the crude products or starting monomeric tripeptides, indicating that the racemized sequences gave rise to lower molecular-weight oligomers. The sequences investigated were -Pro-Pro-Ala-, -Ala-Pro-Pro-, -Val-Pro-Pro-, -Pro-Pro-Leu-, -Pro-Gly-Leu-, -Pro-Gly-Phe-, -Pro-Gly-Val-, -Gly-Val-Pro-, -Phe-Pro-Gly-, -Leu-Pro-Gly-, and Ile-Pro-Gly-.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1976.360150209
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    Paper (German National Licenses)
    Fulltext
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