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  • 1
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Microbiology 24 (1970), S. 17-52 
    ISSN: 0066-4227
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Microbiology 32 (1978), S. 155-183 
    ISSN: 0066-4227
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 167 (1951), S. 610-611 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] At this station we have completed what is, so far as we know, the first comprehensive investigation into the behaviour of dairy cows in the tropics. Six grade 6 Friesian cows with approximately the same productivity were selected from the station herd. They were managed in the same way as, and run ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 214 (1967), S. 623-624 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Cell free extracts were prepared by passing through a French pressure cell washed cells collected after 24 h from a mineral salts medium containing 0*05 per cent yeast extract and 0.25 per cent Oronite C10-C20 mixture as the source of carbon. The extracts, suspended in 0.05 molar tris ...
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 1057-1058 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] VARIOUS authors1'3-7 have published conflicting reports on the level of urea excretion in the urine of ruminants. Read1, investigating the urine nitrogen excretion of a pregnant female camel (Camelus bactrianus) fed on sorghum leaves, sweet potato and salt, reported that there was only a trace of ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 828-829 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] As the clinical symptoms were somewhat similar to those described by workers in the temperate zone as occurring in lambs suffering from 'stiff lamb disease' and calves with 'white muscle disease' (Blaxter and Brown1), and in piglets born to sows fed on a vitamin E deficient ration (Adamstone et ...
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-8773
    Keywords: Denitrifier ; Mn-superoxide dismutase ; Dimeric protein ; Cysteine-containing protein ; NO protection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Summary Bacillus halodenitrificans produced a dimeric, manganese-containing superoxide dismutase constitutively when grown either aerobically or as a denitrifier. The molecular mass of the enzyme was determined by sedimentation equilibrium to be 41.4±3 kDa with each subunit estimated at 26 kDa. Plasma emission spectroscopy indicated the presence of 1.22 mol manganese atoms/mol holoenzyme. The electronic absorption spectrum displayed a broad band centered at approximately 474 nm (ε=560 mM−1 · cm−1) and a shoulder at 595 nm. In the ultraviolet range, the spectrum exhibited split maxima at 278 nm and 283 nm and a shoulder at 291 nm, thus resembling the spectra of superoxide dismutase fromBacillus subtilis andEscherichia coli. The amino acid composition of theB. halodenitrificans enzyme differed slightly quantitatively but little qualitatively from counterpart enzymes from other sources. Like the superoxide dismutases ofMycobacterium lepraemurium and human mitochondria, theB. halodenitrificans enzyme exhibited several cysteine residues. As expected from the capacity superoxide dismutase exhibits for protecting NO as neutrophil cytotoxicity factor, theB. halodenitrificans superoxide dismutase did not interfere with accumulation of NO produced by the organism's nitrite reductase.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Antonie van Leeuwenhoek 34 (1968), S. 298-312 
    ISSN: 1572-9699
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A component formed in the membranes ofPseudomonas natriegens during induction to utilization of mannitol orl-arabinose was found to bind the specific inducing substrate. Chloramphenicol inhibited the synthesis of the component. Binding was optimal at 25–30 C in the presence of Na+ and K+. Trypsin, KCN, and N-ethylmaleimide destroyed or suppressed the capacity to bind, but DNase and RNase had little effect. Specific binding was demonstrated by equilibrium dialysis with labeled substrate on one side of the dialysis cell and membranes or alkaline extracts of membranes on the other. Membranes from mannitol-grown cells broke the equilibrium established for C14-labeled mannitol, whereas membranes from cells grown in sea water nutrient broth did not. The substrate was unchanged after binding. Simple alkaline extraction followed by centrifugation at 105,000 ×g for 60 min gave significant purification of the binding component. Specific requirement of Na+ and K+ for substrate binding by alkaline extracts of membranes could not be demonstrated. The binding capacity of the solubilized component in alkaline extracts was destroyed by heating, but was stable to storage at 0 C for several days.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Marine biology 1 (1967), S. 136-139 
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Gas chromatography was used to analyse the gases released by growing cultures of the denitrifying marine bacterium Pseudomonas perjectomarinus. When nitrate was provided as final oxidant, CO2 was the first detectable gas released. Following the peak rate of release of CO2 at approximately 16 h, N2 liheration began and peaked at 30 h. When N2O was provided as terminal oxidant, CO2 and N2 release began within a few hours and the rate of liberation of both increased for 45 to 50 h before leveling. Cell-free extracts of bacteria from denitrifying cultures of P. perfectomarinus were incubated anaerobically with nitrate, malic acid and electron transfer cofactors provided, and the gases in the atmosphere above the reaction mixtures were analysed. NO was found to be present transiently, and N2O was discerned after prolonged incubation. The applicability of gas chromatography to analyses of marine ecosystems and the need for better means of sampling the atmosphere above enzymatic reaction mixtures were disoussed.
    Type of Medium: Electronic Resource
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