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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 181 (1958), S. 1791-1792 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The existence of the enzyme in rat tissues is at present debatable1. The reaction is reversible, and, in fact, the equilibrium is very much in favour of cleavage of the succinate, but it may be driven in the direction of synthesis by the addition of suitable systems capable of oxidizing reduced ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 1064-1065 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It seemed probable that the factor suppressing insulin action in these experiments was the growth hormone, which is known to have a diabetogenic action4. It has now been found, however, that when diaphragm muscle is given a preliminary incubation in a solution of purified growth hormone, prepared ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 215 (1967), S. 521-522 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Beef heart (800 g) was homogenized in 41. of 0.25 mmolar sucrose, containing 20 mmolar triethanolamine buffer pH 7.2, and 2 mmolar EDTA, according to the recommendations of Green and Ziegler7. The myofibrillar fraction was centrifuged down at 1,0000 for 15 min and the supernatant, containing the ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 307 (1984), S. 257-259 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Three groups of workers have compared the proportions of organic and inorganic phosphate in soil buried beneath an ancient structure: a Roman villa in England4 (?1,800 yr BP), a megalithic tomb in Ireland5, ( 4,000 y r BP), and a Kurgan burial mound in Moldavia6 (4,500 yr BP). In each instance the ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 239 (1972), S. 512-513 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dendrochronological calibrations have been used to reassess particular samples8 or time relationships between cultures9'10, but archaeologists have avoided routine application of the Suess curve because of the difficulty of quoting multiple possibilities in terms of a single probable date together ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 250 (1974), S. 407-408 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] It should be possible to locate wiggles, if they exist, by using the estimated radiocarbon ages of samples themselves. If the samples have a uniform age distribution in sidereal time, then the apparent distribution in radiocarbon years would be uneven around the date at which the wiggle occurs; in ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Neurochemical research 5 (1980), S. 805-808 
    ISSN: 1573-6903
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Sensitivity of glutamine synthetase assay by the hydroxamate method can be doubled by replacing ferric chloride with ferric nitrate or ferric perchlorate, each with the appropriate acid.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Environmental geochemistry and health 10 (1988), S. 105-112 
    ISSN: 1573-2983
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Medicine
    Notes: Abstract Thirty-eight soil samples from a sondage excavated through a 6- metre stratified tell (Gomoiava, in central Yugoslavia) have been analysed for nine biophile elements: Mg, Sr, Zn, Cu, Ni, Mn, Cr, Pb and B. The site was occupied from 7000 BC to 500 AD (calendar years). The results have been collated with earlier estimates of P and Ca, made on a larger series of samples from the same site. The results are discussed in terms of useful information, to supplement that given by phosphate analysis, about stratification and the relationship of the settlement to its environment. It is concluded that leaching probably distorts the results for Ca and Mg. The results for Mn may help to distinguish phosphate accumulation due to man from that due to farm livestock. There is significant accumulation of Sr and B, both of which have potential value, although some of the analytical results for the latter are suspect. The results for Zn, Cu and Ni are highly correlated, with sharp peaks which couid provide precise information about individual strata when more experience of interpretation has been gained. Only Cr and Pb appear to provide little useful information at this site.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular histology 7 (1975), S. 165-178 
    ISSN: 1573-6865
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Synopsis A tetrazolium staining medium incorporated in a gel has been used in a histochemical study of enzymes in thin sections of heart muscle. Formazan distribution patterns given by mitochondrial enzymes were inconsistent with the location of these enzymes revealed by the extraction of whole tissue. Similar stain distributions were given by lactate dehydrogenase, glutamate oxaloacetate transaminase and glutamate dehydrogenase. The distribution given by succinate dehydrogenase was not the same as that given by cytochrome oxidase stained by a different technique. Alcohol dehydrogenase added to the tissue assumed a distribution which suggested some adsorption of the enzyme to the tissue, but experiments suggested that this enzyme was not firmly bound to muscle proteins in the manner of some glycolytic enzymes.
    Type of Medium: Electronic Resource
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