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  • 1
    Electronic Resource
    Electronic Resource
    Specific binding of dehydroepiandrosterone sulfate to rat liver cytosol: A possible association with peroxisomal enzyme induction
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Molecular Cell Research 1224 (1994), S. 139-146 
    Details
    ISSN: 0167-4889
    Keywords: (Rat liver cytosol) ; Binding protein ; Dehydroepiandrosterone sulfate ; Enzyme induction ; Peroxisome proliferator
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0167-4889(94)90121-X
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  • 2
    Electronic Resource
    Electronic Resource
    Growth schedule of Xanthium canadense: Does it optimize the timing of reproduction? (1991)
    Springer
    Oecologia 88 (1991), S. 55-60 
    Details
    ISSN: 1432-1939
    Keywords: Annual plant ; Nutrition ; Optimization ; Reproductive allocation ; Xanthium canadense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The effects of nutrition on the timing of reproductive initiation of a short-day annual plant Xanthium canadense (cocklebur) were examined with the following hypotheses in mind: If the plant always follows an optimal growth schedule, low-nutrient plants will initiate reproductive growth earlier than high-nutrient plants. On the other hand, if the plant flowers in response to photoperiodic stimuli, both plants will initiate reproductive growth on the same day. The sand-culture experiment showed that high-nutrient plants flowered earlier than the low-nutrient plants, leading to rejection of the first hypothesis. The predicted optimal flowering time is 2 days later than the actual flowering time in high-nutrient plants and 10 days earlier in low-nutrient plants. These deviations from the optimal times reduced the reproductive yield by 0.1% and 2.3%, respectively. The ratio of the final reproductive yield to the vegetative mass at flower initiation was 1.10 in high-nutrient plants and 0.63 in low-nutrient plants. Since the expected ratio for the optimal growth schedule is 1.0, high-nutrient plants followed the opitmal growth schedule more closely than the low-nutrient plants. Cocklebur is a fast-growing annual which is common in relatively nutrient-rich environments. This study suggests that cocklebur adapts itself to such environments through its photoperiodic response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00328403
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  • 3
    Electronic Resource
    Electronic Resource
    The recovery of staphylococcal enterotoxin from bacterial culture supernatants by ion exchangeThis work was supported by contributions from various companies and associations of the food industries. (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Biochemical and Microbiological Technology and Engineering 3 (1961), S. 41-50 
    Details
    ISSN: 0368-1467
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A method has been developed for the recovery of enterotoxin from bacterial culture supernatants of staphylococcus strain S-6 by use of the ion-exchange resin Amberlite XE-64 (IRC-50). The enterotoxin from 200 ml of bacterial culture supernatant diluted with one volume of water and adjusted to pH 6 can be removed with 1 g of resin pretreated with 0·02 M sodium phosphate, pH 6·2. The enterotoxin is recovered from the resin with 0·2 M sodium phosphate, pH 6·2, with subsequent precipitation with EtOH at -10°C, dialysis, and freeze drying. Partially purified preparations containing 1 emetic dose per 50μg were obtained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbmte.390030106
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