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201.
Kissner TL Moisan L Mann E Alam S Ruthel G Ulrich RG Rebek M Rebek J Saikh KU 《The Journal of biological chemistry》2011,286(36):31385-31396
202.
Guibin Ma Andrey Ilyukhin Julius Glaser Imre Tth Lszl Zkny 《Inorganica chimica acta》2001,320(1-2):92-100
The formation of three [Tl(en)n]3+ complexes (n=1–3) in a pyridine solvent has been established by means of 205Tl and 1H NMR. Their stepwise stability constants based on concentrations, Kn=[Tl(en)n 3+]/{[Tl(en)n−1 3+]·[en]}, at 298 K in 0.5 M NaClO4 ionic medium in pyridine, were calculated from 205Tl NMR integrals: log K1=7.6±0.7; log K2=5.2±0.5 and log K3=2.64±0.05. Linear correlation between both the 205Tl NMR shifts and spin–spin coupling 205Tl–1H versus the stability constants has been found and discussed. A single crystal with the composition [Tl(en)3](ClO4)3 was synthesized and its structure determined by X-ray diffraction. The Tl3+ ion is coordinated by three ethylenediamine ligands via six N-donor atoms in a distorted octahedral fashion. 相似文献
203.
Selecting the appropriate rodent diet for endocrine disruptor research and testing studies 总被引:6,自引:0,他引:6
Thigpen JE Setchell KD Saunders HE Haseman JK Grant MG Forsythe DB 《ILAR journal / National Research Council, Institute of Laboratory Animal Resources》2004,45(4):401-416
Selecting the optimum diet for endocrine disruptor (ED) research and testing studies in rodents is critical because the diet may determine the sensitivity to detect or properly evaluate an ED compound. Dietary estrogens can profoundly influence many molecular and cellular event actions on estrogen receptors and estrogen-sensitive genes. The source, concentration, relative potency, and significance of dietary estrogens in rodent diets are reviewed, including dietary factors that focus specifically on total metabolizable energy and phytoestrogen content, which potentially affect ED studies in rodents. Research efforts to determine dietary factors in commercially available rodent diets that affect uterotrophic assays and the time of vaginal opening in immature CD-1 mice are summarized. A checklist is provided of important factors to consider when selecting diets for ED research and testing studies in rodents. Specific metabolizable energy levels are recommended for particular bioassays. Discussions include the between-batch variation in content of the phytoestrogens daidzein and genistein, the effects of total metabolizable energy and phytoestrogens on the timing (i.e., acceleration) of vaginal opening, and increased uterine weight in immature CD-1 mice. It is concluded that rodent diets differ significantly in estrogenic activity primarily due to the large variations in phytoestrogen content; therefore animal diets used in all ED studies should ideally be free of endocrine-modulating compounds. 相似文献
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Julius Głowacki 《Plant Systematics and Evolution》1909,59(2):51-53
Ohne Zusammenfassung 相似文献
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Julius Stoklasa J. Bareš E. Groldbach J. Šilhavý V. Strádal M. Štrupl 《Protoplasma》1929,8(1):199-214
Ohne Zusammenfassung 相似文献