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  • 1
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Journal of chemical & engineering data 15 (1970), S. 352-355 
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Pure and applied geophysics 112 (1974), S. 265-273 
    ISSN: 1420-9136
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Summary The shape of a bent flexible wire is shown to be identical to the shape of constant absolute vorticity trajectories in the atmosphere. This shape is characteristic of river meanders and is shown to be characteristic of meanders in the jet stream and the Gulf Stream. Several examples are considered and shown to match extremely well with the ‘ideal’ curves.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 90 (1974), S. 275-295 
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The hypothesis advanced by James W. Truman to explain the photoperiodically regulated circadian rhythm of adult eclosion in a Saturniid moth has been modified and extended to form the basis of a proposed Developmental Determination Model. This model postulates the synthesis of a hypothetical substance (S) and the kinetics of its metabolism in the presence or absence of light energy. The relationship of scotophase duration to the temporal occurrence of postulated “determination response thresholds” was estimated in the terms of the hypothetical model. The temporal position of a postulated “Determination Gate” was also approximated in terms of the model system. The characteristics of the proposed model were designed to be consistent with the observed effects of different 24-hour photoperiods on the incidence of diapause among larvae of the European corn borer,Ostrinia nubilalis. The proposed Determination Model was shown to be capable of generating all four types of photoperiodic diapause reponse curves reported in existing literature.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of comparative physiology 90 (1974), S. 297-310 
    ISSN: 1432-1351
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary A model formulated to provide a theoretical basis for the interpretation of developmental responses to photoperiod is presented. Experimental data on the photoperiodic determination of diapause and non-diapause in the European corn borer,Ostrinia nubilalis, were used to estimate the required characteristics of the model. The prototype model, presented in the previous paper (I) of this series (Beck, 1974) postulated the existence of a photoperiodically regulated time period during which developmental alternatives are determined; this time period was called the Determination Gate (DG). The present study includes determination of the characteristics and kinetics of a model system [the (P)-system] underlying the temporal placement of DG. The effects of photophase duration on subsequent DG placement are also presented.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 38 (1973), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Beef and rabbit psoas muscle fibers were soaked in a crude muscle cathepsin preparation, collagenase or 2% KCl. Tensile properties (breaking strength and break elongation) and surface ultrastructure were monitored. Cathepsins considerably accelerated decreases in tensile properties found in an un-soaked control while KC1 produced significant but less extreme effects. Collagenase showed similar results for breaking strength but break elongation was only slightly influenced. Surface ultrastructure revealed that KC1 caused a variable loss of structure including collapse and disappearance of striations, swelling and some transverse fiber breakage. Cathepsins speeded and expanded this damage producing multiple breakage with extensive disruption in some cases. These effects are similar to those observed in naturally aged meat and occur at the same temperature and pH. Collagenase treatment, however, initially brought about a shredding and dissolution of collagen fibers followed by disintegration of the sarcolemma and exposure of relatively undamaged myofibrils.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 38 (1973), S. 0 
    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
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    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— The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2,3-diaminopropionic acid, was not effective, nor was αβω-diaminc acid, 3,6-diaminohexanoic acid, although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it has not been possible to draw detailed conclusions about the mechanism of stabilization, nor can a detailed structure of the stabilized complex be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    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— The solid compound formed by treating L-lysine with linoleic acid has been examined by chemical stoichiometry, electrical conductivity, infrared and nuclear magnetic resonance spectroscopy. The compound has been shown to be a true equimolar salt. Evidence from nmr and ir spectroscopy shows that the diene system of the linoleic acid is not changed from that in the free fatty acid. Conductivity measurements show that the salt is a moderately strong electrolyte. Salts of other basic amino acids, ornithine and 2,4-diaminobutyric acid, with linoleic and oleic acids were also examined and showed similar evidence. Interpretation of the data and the significance of the findings to stability of amino acid salts of unsaturated fatty acids are discussed.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 36 (1971), S. 0 
    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 Instron tester served to evaluate physical properties of uncooked rabbit and beef muscle including work of rupture, breaking strength, break elongation elasticity and stress relaxation. These methods measure variations in muscle type, aging and post-mortem treatments comparably with shearing instruments. Shank showed higher tensile properties than tenderloin, less elasticity and lost more applied stress. With rabbit, the breaking force of longissimus dorsi unrestrained during rigor was .237 Ib/g ± 7.5% for samples 5.0 cm by 0.2–0.5 cm2 while restrained muscle gave .168 ± 9.9% and also exhibited higher elasticity and break elongation. Post-mortem aging decreased tensile properties and elasticity. Psoas muscle, characterized by more coextensive fibers, had higher tensile properties than longissimus dorsi.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 35 (1970), S. 0 
    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: Shear strength, sarcomere length and protein solubility were studied in rabbit longissimus dorsi allowed to pass through rigor in free and stretched physical states. Stretched muscles were significantly more tender as evidenced by lower shear values. They also exhibited significantly longer sarcomeres as compared to their paired controls allowed to pass through rigor without restraint. Greater amounts of total protein were extracted from stretched muscles in all trials except one. Significantly greater amounts of actomyosin were extracted from stretched muscles in all trials. The actomyosin results were unexpected since it has been suggested by several workers that actomyosin formation is directly related to toughness in muscle. Some possible explanations for the results obtained in this study are discussed.
    Type of Medium: Electronic Resource
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