TS—120型透析用水设备性能测试

本文介绍该设备测试过程所用的仪器、设备，成品水的制备工艺，测试结果与分析，包括设备产水量与工作压力的测定、细菌检验、光谱分析、透析用水的质量检验。临床试用证明，水质安全、可靠。     

用Ames点试验法对日用化工品致突变性的研究(附30种分析报告)

本文对30种日用化工品进行了Ames′试验研究。结果表明:洗衣粉、洗发膏有致突变作用,染发剂和治疗性化妆品大部分有致突变作用;一些护肤营养类化妆品则无。实验中发现的大部分致突变物质在高浓度时有抑制环,诱变作用不明显,经稀释到合适浓度后才有明显的致突变作用。     

国内常用避孕药具对女性人群月经影响的研究

通过对使用国内常用16种避孕药具的10万例女性人群,采用流行病学调查方法,对月经周期、每次月经持续时间、痛经等指标进行分析、评价。结果显示:各种避孕药具3项指标异常率各异,月经周期异常率为10.25%,每次月经持续时间异常率为8.40%,痛经发生率为7.67%。     

Adenosine regulation of canine cardiac adenylate cyclase

Adenosine has a biphasic, [Mg²⁺]-dependent effect on the catalytic activity of dog heart adenylate cyclase. In the presence of 0.5 mM Mg²⁺, adenosine stimulated cyclic AMP formation, but when the cyclase was activated with 4 mM Mg²⁺ plus 0.5 mM Mn²⁺, adenosine inhibited catalytic activity in a dose-dependent fashion. Adenine, 3'-deoxyadenosine and selected purine-modified adenosine analogs stimulated the enzyme, whereas 2'-deoxyadenosine, 5'-deoxyadenosine and adenine-α-l-lyxofuranoside mimicked the inhibitory effect of adenosine on the Mg²⁺ plus Mn²⁺ stimulated enzyme. These results are consistent with the ‘two receptor’ model of Londos and Wolff [C. Londos and J. Wolff, Proc. natn. Acad. Sci. U.S.A.74, 5482 (1978)], but they raise the possibility of subtle organ and species differences in the chemical determinants of adenosine binding. Adenosine in both intracellular and extracellular compartments may modulate adenylate cyclase activity in the beating heart, in addition to its putative role in the regulation of coronary vascular resistance.     

Stimulation of haemopoietic stem cell proliferation: Characteristics of the stimulator-producing cells

Media conditioned by regenerating murine bone marrow cells contain a stimulator of haemopoietic stem cell proliferation. Fractionated cell populations have been examined for production of this stimulatory activity in order to characterize its cellular source. The stimulator is produced by adherent, phagocytic radioresistant, Thy 1.2^?, Fc⁺ cells in a population concentrated in a density range of 1.064 – 1.072 g/ml. The results indicate that the producer cells reside in the heterogenous mononuclear phagocytic population of the bone marrow.