نتایج جستجو برای: heteropoly acids hpas
تعداد نتایج: 265361 فیلتر نتایج به سال:
A general strategy in terms of degradating and ion-exchange synthesis was used to design pentadecatungstotrivanadodiphosphoric heteropoly acid H(9)P(2)W(15)V(3)O(62)·28H(2)O with Dawson structure and excellent conductivity. The product was characterized by ICP-MS, IR, UV, XRD, (31)P NMR, TG-DTA and electrochemical impedance spectroscopy (EIS). The results indicate that H(9)P(2)W(15)V(3)O(62)·28...
Selenium compounds have strong anti-tumor effects and are well-tolerated. We examined the anti-tumor effects of (NH4)2H15Se2VIMo10V3O52·2H2O (Se2Mo10V3), a heteropoly compound containing selenium. Se2Mo10V3 inhibited proliferation in K562 cells with a half-maximal inhibitory concentration of 78.72±2.82 mg/L after 48 h and 24.94±0.88 mg/L after 72 h. Typical apoptotic morphologies were also obse...
A procedure for the determination of liver microsomal glucose-6-phosphatase is described. Homogenization and ultracentrifrigation were used to prepare a precipitate whose character was defined by monitoring the desire enzyme activity which serves as a marker. Activity of the enzyme was determined by means of a sensitive colorimetric reaction for the product, inorganic phosphate. Non-enzymatic h...
Abstract Background and Objectives Immune platelet refractoriness is a complication of blood transfusion in patients with multiple platelet transfusions. Antibodies against surface antigens, including human platelet antigens (HPAs) and human leukocyte antigens (HLAs), can be produced which can cause the degradation of transfused platelets by macrophages. In this study, the frequency of platele...
OBJECTIVE To determine which parameter is the most useful screening test for hypothalamic-pituitary-adrenal suppression in asthmatic children. DESIGN Cross-sectional study. SETTING Paediatric allergy clinics in Cape Town, South Africa. PARTICIPANTS 143 asthmatic children of mostly mixed ancestry, aged 5-12 years. OUTCOME MEASURES Primary outcome measures included Spearman correlation co...
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