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  • 1990-1994  (5)
  • dilatometry  (2)
  • quality  (2)
  • Ammonia  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Reatarding effect of nitrogen ylide for the polymerization of N-vinyl pyrrolidone (1990)
    Springer
    Colloid & polymer science 268 (1990), S. 645-648 
    Details
    ISSN: 1435-1536
    Keywords: β-picolinium-p-chlorophenacylide ; α-α azobisisobutyronitrile ; N-vinyl pyrrolidone ; dilatometry ; retarder ; kinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract β-Picolinium-p-chlorophenacylide (β-PCFY) acts as a retarder for polymerization of N-vinyl pyrrolidone. The polymerization runs were carried out at 60°C using benzene as an inert solvent. The kinetic equation for the present system may be written asR p α[β-PCPY]−1.0 [AIBN]0.66[N-VP]1.0. The value of overall energy of activation for polymerization in presence and absence ofβ-PCPY was computed as 44.0 and 42.3 kJ mol−1, respectively. The inverse relationship ofR p and¯M v withβ-PCPY suggests thatβ-PCPY acts as a polymerization retarder. The retarding effect is also evidenced by higher initiator exponent value and higher value of energy of activation in presence of ylide. A mechanism is also proposed in which polymer propagating chain combines with one ylide component to give resonance stabilized radical.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410406
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Yield andin vitro nutritional quality of some leguminous seed protein isolates (1991)
    Springer
    Plant foods for human nutrition 41 (1991), S. 247-251 
    Details
    ISSN: 1573-9104
    Keywords: wild legumes ; seed protein ; yield ; quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seed protein concentrates (SPC) were extracted from 4 leguminous species and the extractabilities of total N (nitrogen), protein N and SPC determined. In addition, composition, calorie value andin vitro enzymatic digestibility of these SPCs was analysed. Results indicate the promising nutritional potential of these SPCs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02196393
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Seed protein yield from someCrotalaria spp andin vitro nutritional quality of that fromC. juncea (1990)
    Springer
    Plant foods for human nutrition 40 (1990), S. 195-200 
    Details
    ISSN: 1573-9104
    Keywords: Crotalaria ; seed ; protein ; yield ; quality
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seed Protein Concentrates (SPC) of 6 species ofCrotalaria were extracted and the extractabilities of SPC, total N and protein N determined. SPC of high yielding species (C. juncea) was analysed for the contents of amino acids, ash, phosphorus, sugar, starch, fibre and calories, as well as forin vitro digestibility. Results indicate the promising potential ofC. juncea for SPC yield.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01104142
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Isolation of a symbiotic cyanobacterium, Nostoc cycadae, and its nitrogen metabolism (1994)
    Springer
    World journal of microbiology and biotechnology 10 (1994), S. 299-302 
    Details
    ISSN: 1573-0972
    Keywords: Ammonia ; cyanobacterium ; Cycas ; Nostoc cycadae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Nostoc cycadae isolated from the host Cycas revoluta grew well in medium devoid of combined nitrogen but maximum growth was in medium containing nitrate (4.1 μg chlorophyll a ml-1). Aerated coralloid roots in the dark produced more NH3 when treated with l-methionine-dl-sulphoximine (MSO), an inhibitor of glutamine synthetase. With cultured N. cycadae and freshly isolated N. cycadae, NH3 production was enhanced by adding a host-tissue extract in the light or in the dark, whereas it was decreased by adding MSO. Nitrogenase activity was four times higher in coralloid root than in the cultured endophyte N. cycadae. The host-tissue extract may inhibit NH3 assimilatory pathways, thus inducing production of NH3 that can be utilized by the host itself.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414868
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Copolymerization of zinc acrylate with acrylonitrile initiated by As2S3-styrene complex (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 34 (1994), S. 105-109 
    Details
    ISSN: 0959-8103
    Keywords: Zinc acrylate ; acrylonitrile ; As2S3-styrene complex ; copolymerization ; dilatometry ; kinetics ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Radical copolymerization of zinc acrylate (ZnA2) with acrylonitrile (AN), initiated by As2S3-styrene complex(I), in dimethyl Sulphoxide (DMSO) at 90 ± 0.1°C for 1.0h under inert atmosphere, yields non-alternating copolymers. The kinetic expression is Rp ∝ [I]0.33 [ZnA2]0.25 [AN]0.44, i.e. the system follows non-ideal kinetics, which is due to primary radical termination as well as degradative chain transfer reactions. The values for activation energy (E) and k2p/kt are 128kJ mol-1 and 8.57 × 10-7 litre mol-1 s-1, respectively. Thermal stability, solubility in different solvents, and IR and NMR spectra have been evaluated.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1994.210340114
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    Paper (German National Licenses)
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