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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of L -Ascorbic Acid in Plants and Animals (1953)
    [s.l.] : Nature Publishing Group
    Nature 171 (1953), S. 348-349 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experimental facts are as follows. The y-lactones of D-glucuronic acid and L-gulonic acid, when fed to cress seedlings or injected into rats, were found to be transformed, into L-ascorbic acid. D-Galacturonic acid methyl ester, and L-galactonic acid y-lactone behaved similarly. No other sugar ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/171348a0
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  • 2
    Electronic Resource
    Electronic Resource
    LOW TEMPERATURE AIR DRYING OF CARROT CUBES (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Individual frozen carrot cubes were suspended on wires and dried in a stream of low temperature dry air. One of the cubes was suspended on a thermocouple. During drying the weight and temperature of the product and the specific humidity, velocity and temperature of the air were recorded. An analytical model, utilizing the concept of external and internal resistances to the transfer of heat and mass, was developed for the prediction of the drying rate. The experimental data were used to determine a functional relationship between the internal resistances and the fraction of the original moisture remaining in the product. The drying rates predicted were in good agreement with experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1977.tb14481.x
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  • 3
    Electronic Resource
    Electronic Resource
    In vitro effects of melanocytolytic agents and other compounds upon dominant human melanoma tyrosinase activity (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 21-22 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The activity of dominant human melanoma tyrosinase isozyme was greatly decreased by certain reducing agents. The number and geometry of phenolic groups as well as free-SH group appear important for enzymic inhibition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921877
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  • 4
    Electronic Resource
    Electronic Resource
    Serum tyrosinase in human lung carcinoma (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 20-21 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Compared to normal humans, lung carcinoma patients show increased tyrosinase activity. 7 serum enzymic fractions or carriers were present in the diseased state. Further, serum tyrosinase inhibitory factors generally were decreased in lung carcinoma patients compared to normal individuals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01921876
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  • 5
    Electronic Resource
    Electronic Resource
    Stress analysis of crack problems with a three-dimensional, time-dependent computer program (1976)
    Springer
    International journal of fracture 12 (1976), S. 607-617 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé Un programme de calcul à 3 dimensions et indépendant du temps a été utilisé pour l'analyse en tension-déformation des matériaux élasto-plastiques sujets à des contraintes et des tractions. On considère différents types de géométries. Les possibilités et les avantages que présente ce programme de calcul par différence finie explicite sont démontrés et l'on a fait des recommandations pour ses applications futures.
    Notes: Abstract A three-dimensional, time-dependent computer program is used for the stress-strain analysis of elastic-plastic materials subjected to tensile loads. Several geometries are considered. The capabilities and advantages of this explicit finite difference computer program are demonstrated, and recommendations for future applications are made.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034646
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  • 6
    Electronic Resource
    Electronic Resource
    Propagation of a flexure crack: experiment and analysis (1978)
    Springer
    International journal of fracture 14 (1978), S. 281-291 
    Details
    ISSN: 1573-2673
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Résumé Des études expérimentales et des analyses sont effectuées sur la vitesse de lente décélération ou d'accélération d'une fissure de flexion se propageant dans une éprouvette plate en verre. L'éprouvette est soumise à une indentation sphérique sur sa surface supérieure et repose sur un double appui à couteaux ou sur un anneau à sa partie inférieure. La distance entre appui est comparable à l'épaisseur de la plaque de telle sorte qu'un champ de tensions tridimensionnelles puisse s'établir. La distribution des tensions est déterminée analytiquement en fonction de ses composantes de rétraint et de flexion. On montre que la variation de la vitesse de fissuration ne dépend pas de la tension totale règnant en surface mais de la tension provoquant le rétrécissement suivant le plan. On montre que ce type d'expérience ne produit qu'une faible contrainte de rétraint de sorte que l'on observe expérimentalement une faible variation de la vitesse de la fissure au lieu d'une vitesse limite supérieure.
    Notes: Abstract Experiments and analyses are carried out on the low decelerating and accelerating speed of a flexure crack running in a specimen of a glass plate. The specimen is subjected to a spherical indentation on its upper surface and rests on a knife-edge or ring foundation. The span of the foundation is comparable to the plate thickness so that a three-dimensional stress field is established. The stress distribution is determined analytically in terms of its stretching and bending components. It is shown that the variation of the crack speed depends not on the total surface tensile stress, but on the in-plane stretching stress. The experiment is shown to have produced only a small stretching stress so that the low varying speed of the crack, instead of its high limiting speed, was observed experimentally.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034689
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  • 7
    Electronic Resource
    Electronic Resource
    Indirect synthesis of multidegree-of-freedom transient systems (1976)
    Springer
    Journal of optimization theory and applications 20 (1976), S. 331-346 
    Details
    ISSN: 1573-2878
    Keywords: Dynamic systems ; linear programming ; limiting performance ; indirect synthesis method ; transient disturbances ; Fourier series ; control forces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract It is shown that an indirect synthesis method can be used in the efficient optimal design of multidegree-of-freedon, multidesignelement, nonlinear, transient systems. The technique begins with a limiting performance analysis which requires linear programming for a kinematically linear system, following which the system is selected using system identification methods such that the designed system responds as closely as possible to the limiting performance. The efficiency is a result of the method avoiding the repetitive systems analyses accompanying other numerical optimization methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00933627
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  • 8
    Electronic Resource
    Electronic Resource
    The influence of molecular weight on the large deformation behavior of SBS triblock copolymer elastomers (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 21 (1977), S. 629-643 
    Details
    ISSN: 0021-8995
    Keywords: 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: Engineering stress-strain properties were determined for two polystyrene-polybutadiene-polystyrene (SBS) triblock copolymer elastomers, one consisting of blocks of molecular weight 7000/43000/7000 and the other, 16000/85000/17000. In addition, various blends of these two materials were prepared in order to vary the number-average molecular weight of the blocks in a systematic way while maintaining polystyrene content in the range of 25-28 wt %. Samples were solvent cast from benzene or benzene/heptane mixtures and annealed before testing. Ring specimens were extended to rupture at varying strain rates on an Instron tensile tester. Results indicate that number-average molecular weight has a marked influence on stress-strain behavior over the range of molecular weights and testing conditions employed. The observed behavior is consistent with a systematic increase in the proportion of a mixed interfacial region between the pure polystyrene and polybutadiene domain as molecular weight decreases. The interfacial region contributes to mechanical hystersis, rate sensitivity, and toughness in the SBS materials. Scanning electron photomicrographs of fracture surfaces also showed systematic changes with molecular weight.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1977.070210305
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  • 9
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    Stochastics of cycle completions (fluxes) in biochemical kinetic diagrams. (1975)
    National Academy of Sciences
    Details
    Publication Date: 1975-04-01
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
    Published by National Academy of Sciences
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  • 10
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    WATER ADSORPTION ON SOIL HUMIC SUBSTANCES (1976)
    Canadian Science Publishing
    Details
    Publication Date: 1976-11-01
    Description: not available
    Print ISSN: 0008-4271
    Electronic ISSN: 1918-1841
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Published by Canadian Science Publishing
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