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  • 1
    Electronic Resource
    Electronic Resource
    Enzymatic Reducing Pathways in Meat (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: Methods for measuring reducing capacity of meats are described. These include changes in oxidation-reduction potentials of ground meat and changes in oxygen tension of meat slurries, as well as reduction of metmyoglobin. Except for a small residual utilization of oxygen in meat slurries (ascribed to nonenzymatic oxidation), all reductive activity in meat can be stopped by inhibitors of DPNH oxidation via the electron transport chain. Added DPN accelerates all reductive activity. Metmyoglobin reduction does not occur until oxygen has snbstantially disappeared from the meat.Meat contains little or no snccinate. Added succinate greatly accelerates oxygen utilization, but affects metmyoglobin reduction only indirectly by establishing anaerobic conditions more rapidly. It is concluded that both oxygen utilization and metmyoglobin reduction in meat are normally mediated through DPN.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1966.tb03261.x
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  • 2
    Electronic Resource
    Electronic Resource
    Nicotinamide and Nicotinic Acid in Color Preservation of Fresh Meat (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: —Nicotinamide (NAm) protected the metmyoglobin (MetMb), reducing activity and oxygen consumption of ground beef or pork on refrigeration or freezer storage. Nicotinic acid (NA) increased MetMb in aerobically refrigerated ground meats, while NAm, particularly in combination with ascorbic acid, decreased it. In model systems and meats, hemochrome formation occurred with reduced myoglobin and either NA or NAm, but more readily with NA and at lower pH values. No hemochrome was formed in aerobically stored meats with NA or NAm, even with ascorbic acid present. Anaerobic conditions gave hemochromes, but only at the higher concentrations and lower pHs tried. The implication of these findings to color protection in fresh meats is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1969.tb10346.x
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  • 3
    Electronic Resource
    Electronic Resource
    Spontaneous Resistance to Chloroquine in a Strain of Rodent Malaria ( Plasmodium berghei yoelii ) (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 1048-1049 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Further tests have shown that this strain is spon-taneously as resistant to chloroquine as are the highly resistant strains of P. b. berghei which have been arti-ficially produced in the laboratory (ref. 2 and unpublished work of Warhurst). The early history of the strain of P. b. yoelii (No. 11X) ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2131048a0
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  • 4
    Electronic Resource
    Electronic Resource
    Primary Exoerythrocytic Schizonts of a Mammalian Plasmodium as a Source of Gametocytes (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 191-192 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The experiments reported here were designed to discover whether or not gametocytes of the murine parasite, Plasmodium berghei yoelii Landau and Killick-Kendrick, 1966, ever develop directly from merozoites produced by the exoerythrocytic schizonts, with no intervening schizogony in the blood. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/220191a0
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  • 5
    Electronic Resource
    Electronic Resource
    Enzymatic Adaptation to Contractile Activity in Skeletal Muscle (1965)
    [s.l.] : Nature Publishing Group
    Nature 208 (1965), S. 1068-1070 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] IF skeletal muscle is made to contract in a regular and repeated fashion in excess of normal use, as in training, the tissue appears to adapt to the increased activity by improved performance and often marked hypertrophy. Nevertheless, attempts to relate the marked changes in performance brought ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2081068a0
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  • 6
    Electronic Resource
    Electronic Resource
    Protein Synthesis and Enzyme Response to Contractile Activity in Skeletal Muscle (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 406-408 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1. EFFECT OF INHIBITORS OF PROTEIN SYNTHESIS ON THE INCREASE IN CREATINE PHOSPHOKINASE ACTIVITY INDUCED BY CONTINTTED ISOMETRIC CONTRACTION IN THE ISOLATED FROG SARTORIUS MUSCLE Inhibitor Puromycin 0-Fluorophenyl alanine Ethionine Actinomycin D 8-Azaguanine 5-Bromouracil Concentration ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/213406a0
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  • 7
    Electronic Resource
    Electronic Resource
    Inhibition of the Mitogenic Factor in Phytohaemagglutinin by an Antiserum (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 622-624 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Sensitivity to other antigens, such as PPD, diphtheria toxoid, pertussis vaccine, or penicillin, is attended by this mitogenic response of cultured leucocytes to addition of the appropriate antigen10'11. Antibodies may stimulate mitosis; a leucocyte aiitiserum produced an increased mitosis in a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/213622a0
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  • 8
    Electronic Resource
    Electronic Resource
    PROBLEMS OF A CENSUS OF NATIONAL WEALTH (1966)
    Oxford, UK : Blackwell Publishing Ltd
    Review of income and wealth 12 (1966), S. 0 
    Details
    ISSN: 1475-4991
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: This paper is essentially a summary of the book Measuring the Nation's Wealth (Volume 29, Studies in Income and Wealth, New York: National Bureau of Economic Research, 1964), which is the report of study directed by the author. The purpose o f the study was to assess the problems and possibilities of conducting a national census of real wealth as a basis for continuing wealth and balance sheet estimates for the U.S. economy, by major sector.It is stressed that the balance sheets and wealth estimates should be designed as a consistent part of an integrated system of national income accounts. Thus, valuation (at market prices and/or depreciated replacement costs), sectoring, and type-of-asset detail in the basic data and derived estimates should be compatible with the flow estimates contained in the economic accounts. Consistency of stock and flow estimates facilitates analysis of inter-relationships, and is helpful in the estimation process.It is recommended that in the U.S. asset data by broad categories be collected as part of the recurring economic censuses and other reporting systems, but that detail on fixed reproducible assets (construction and equipment) at cost, by year or period of acquisition, be obtained from a small sample of respondents in each industry. The detail would be useful in its own right, and also permit revaluation of the assets by use of price indexes and depreciation rates to a current depreciated replacement cost basis. Where feasible, respondent estimates of market values would also be obtained.The proposal is thus a compromise between the Japanese 1955 sample survey of assets, and the detailed wealth inventory of the U.S.S.R. which was begun in 1959. Preliminary work is now underway in the U.S. federal statistical agencies to expand collection of asset data, and to prepare comprehensive wealth estimates in the framework of the national income accounts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1475-4991.1966.tb00711.x
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  • 9
    Electronic Resource
    Electronic Resource
    Phytochrome in seeds of Amaranthus caudatus (1969)
    Springer
    Planta 88 (1969), S. 293-302 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Dry seeds of Amaranthus caudatus show little or no photoreversible absorption changes, attributable to phytochrome. During imbibition phytochrome appears in two phases, one immediately after sowing and the second after about 8 hr. Experiments at different temperatures and under continuous illumination with red, far-red and blue light suggest that there are two pools of phytochrome. The first phase in the appearance of phytochrome could be due to the change in optical properties of the sample on hydration or to rehydration of inactive phytochrome, or both. The second phase probably represents phytochrome synthesis. It is absent at 0° and precedes the water uptake associated with germination by some 10 hr. This second pool of phytochrome does not accumulate in red and blue illuminated seeds indicating that the rate of P fr decay is more rapid than the rate of phytochrome synthesis. The difference spectra of phytochrome in both 2 hr imbibed seeds and 72 hr old seedlings show peaks of absorption at 663 and 735 nm. The presence of P fr in dark imbibed seeds and the process of “inverse reversion” of P r to P fr in darkness have been demonstrated. The results are discussed in relation to previous hypotheses for the mechanism of photocontrol of Amaranthus seed germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00387457
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  • 10
    Electronic Resource
    Electronic Resource
    The in vivo properties of Amaranthus phytochrome (1969)
    Springer
    Planta 86 (1969), S. 21-32 
    Details
    ISSN: 1432-2048
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Phytochrome has been measured in etiolated seedling of Amaranthus caudatus. The phytochrome content increases from the time of germination until 72 hr from sowing, after which it remains constant at 27.5x10-3 Δ (ΔOD) units per 200 seedlings. After a saturating dose of red light P fr decays in the dark to a form not detectable photometrically. There is no evidence for the process of dark reversion of P fr to P fr found in other dicotyledons. Even in the presence of azide, a selective inhibitor of decay, the process of dark reversion is not observed. The decay of P fr has been investigated at different temperatures and follows first order decay kinetics throughout. Over the temperature range 15–30° the Q 10 of decay remained constant at 4.3. The photostationary states of phytochrome (P fr /P total )maintained by mixed red/far-red light have been measured in both seedlings and partially purified protein extracts, with good agreement. The rate of phytochrome decay can be manipulated by changing the P fr /P total ratio. The lag period before a decay curve becomes exponential is characteristic of a particular P fr /P total ratio and represents the time for attainment of the photostationary state. The effect of energy on decay has been investigated under red and blue light. The rate of phytochrome decay is dependent on the P fr /P total ratio and only becomes energy dependent when the light intensity is so low that the photostationary state is never attained. The process of apparent phytochrome synthesis has been found in Amaranthus. After reducing the phytochrome to a low level by red light treatment a rate of apparent synthesis of 1.35×10-4 Δ (δOD) units per hr per 200 seedlings was observed, levelling off at 29% of the original phytochrome level. Under white tungsten lights of high intensity there is a deviation from the expected first order decay kinetics. The nature of this low rate of decay cannot be explained at the present time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00385300
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