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  • 1
    Electronic Resource
    Electronic Resource
    Protein Carbonyl Browning Systems: A Study of the Reaction Between Glucose and Insulin (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 31 (1966), 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: The interaction between glucose and insulin in the dry state was studied at a relatively low glucose concentration with carbon-14-labeled glucose. The conditions of the investigation were that the equilibrium relative humidity was 0.74, pH range 4–7, and temperature range 35–55°C. Under these conditions, the rate of the reaction decreased with increasing pH and had an activation energy of approximately 2.7 Kcal/mole. Reasons are given for believing that the reaction may be the formation of a Schiff base.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1966.tb15414.x
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  • 2
    Electronic Resource
    Electronic Resource
    New syntheses of cyclopenta[cd]pyrene 3,4-oxide and 4-pyrenylacetic acid (1990)
    s.l. : American Chemical Society
    The @journal of organic chemistry 55 (1990), S. 2918-2920 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00296a065
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  • 3
    Electronic Resource
    Electronic Resource
    REACTION AT LIMITED WATER CONCENTRATION. 2. Chlorophyll Degradation (1971)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), 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: SUMMARY— Chlorophyll degradation was studied as a function of water activity (Aw) in freeze-dried blanched spinach puree and in model systems containing cellulose-citrate buffer and chlorophyll a. At 37°C and Aw higher than 0.32, the most important mechanism of chlorophyll degradation is conversion to pheophytin. The rate of chlorophyll a transformation is 2.5 times faster than for chlorophyll b. The relation between Aw and log time for 20% chlorophyll degradation is linear and the chlorophyll/pheophytin ratio is useful for storage prediction as a function of Aw (down to Aw 0.32). At Aw lower than 0.32, the rate of pheophytin formation in spinach is low. New products are formed which can interfere with spectrophotometric determination of chlorophylls and pheophytins. The possibility of removal of Mg from the porphyrin ring of chlorophyll a was shown in model systems even at Aw below BET (Brunnauer-Emmet-Teller) monolayer coverage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1971.tb15542.x
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  • 4
    Electronic Resource
    Electronic Resource
    STABILITY OF N-NITROSO COMPOUNDS (1972)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 37 (1972), 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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1972.tb05834.x
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  • 5
    Electronic Resource
    Electronic Resource
    Reaction at Limited Water Concentration 1. Sucrose Hydrolysis (1969)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 34 (1969), 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: —To enable development of a model describing reaction kinetics in dehydrated foods, we studied sucrose hydrolysis at limited water concentration. Saturated sucrose solutions containing various acids and inert solid materials gave identical rate constants and energy of activation as predicted from dilute solutions. Reaction rates in freeze-dried systems humidified to low moisture contents indicated that any equation describing the rate of hydrolysis must include a term for the velocity of dissolution of solid sucrose into the surface water. The rate of hydrolysis was a pseudo first-order reaction obeying the same kinetics as in dilute solution; the rate of dissolution became rate-limiting when the initial supply of dissolved sucrose was exhausted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1969.tb10355.x
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  • 6
    Electronic Resource
    Electronic Resource
    New Process for Reducing the Nucleic Acid Content of Yeast (1970)
    [s.l.] : Nature Publishing Group
    Nature 228 (1970), S. 181-181 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Candida utilis was grown in continuous culture2 with glucose as the carbon source at pH. 4-0 and at a dilution rate of 0-19 h-1 (^max = 0-4 h-1). The initial nucleic acid content of the cells in these growth conditions was approximately 7 per cent. After collection, the cells were treated in a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/228181a0
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of Cell Fragmentation on Nutritive Value of Bacillus megaterium Protein (1967)
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 1261-1262 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] To our knowledge, the only other published work considering a nutritional effect of cell fragmentation was for ultrasonically disrupted Escherichia coliz. Although this publication concluded that cell disruption had no effect on the biological value of the cell protein, the feeding studies were ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2141261a0
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  • 8
    Electronic Resource
    Electronic Resource
    Urinary Metabolites in the ω-Oxidation of 2,4-Dimethylheptanoic Acid (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 452-453 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHILE examining the metabolism, of 2,4-dimethyl-heptanoic acid-2-methyl-14C (DMHA) in the intact rat, it was found that approximately 20 per cent of the radioactive label was recoverable in the urine after 48 h, while more than 60 per cent was recoverable in respiratory carbon dioxide. (Manuscript ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/208452a0
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  • 9
    Electronic Resource
    Electronic Resource
    Factors controlling ATP levels during photophosphorylation catalyzed by Rhodospirillum rubrum chromatophores (1979)
    Springer
    Applied microbiology and biotechnology 6 (1979), S. 271-278 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Photophosphorylation of ADP catalyzed by chromatophores represents a possible method for regenerating ATP from ADP for use in large-scale enzymatic synthesis of complicated molecules. We found that the extent of conversion of ADP to ATP in the presence of ascorbate and magnesium chloride was influenced by the presence of bubbling gas in contact with the reaction mixture, and by the presence of fumarate: with no fumarate or gas contact, low conversions (usually about 50%) were obtained; however, under the same conditions, but in the presence of fumarate or bubbling gas, 100% conversions were obtained. We discuss mechanistic implications of our findings.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00508099
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  • 10
    Electronic Resource
    Electronic Resource
    The influence of environmental conditions on the macromolecular composition of Candida utilis (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 15 (1973), S. 239-255 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Glucose-limited chemostat cultures of Candida utilis were cultivated at various pH levels (3.0-7.5), temperatures (15-37.5°C), dilution rates (0.06-0.42 hr-1), and with different nitrogen sources (NH4+ and NO3-). The ratio of total nucleic acid to protein increased with increase in dilution rate at constant temperature and decreased with increase in temperature at constant dilution rate. The pattern of these variations is consistent with the hypothesis that the nucleic acid to protein ratio is a function of the ratio of the actual dilution rate to the critical dilution rate corresponding to each one of the cultivation temperatures. This ratio is called “reduced dilution rate.” A basis is proposed on which various microorganisms may be compared with respect to the ratios of cell protein to nucleic acid, RNA, ribosomal RNA, and polysomes.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260150203
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