斯氏狸殖吸虫成虫组织化学观察

斯氏狸殖吸虫成虫实质组织及虫卵含糖原最多,其次是表皮、肌组织和生殖腺。酸性粘多糖仅见于卵黄腺。脂类以肠上皮和卵黄腺含量为多。蛋白质主要含在卵黄腺、肠上皮和肌肉内。酸性磷酸酶以肠上皮,排泄囊上皮,表皮和皮层细胞反应最强。碱性磷酸酶主要位于卵黄腺和皮层。最后讨论了各组织器官的主要组化组成及其生理意义。     

微生物低聚果糖合成酶及其应用研究述评

综述了微生物低聚果糖合成酶来源,基因结构,酶学性质,反应机理,产酶发酵和低聚果糖合成机理等方面的研究进展。     

CAPACITIES FOR BINDING AMINO ACIDS BY tRNAs FROM RAT BRAIN AND THEIR CHANGES DURING DEVELOPMENT

–The total tRNA and some specific tRNAs from the 100,000g soluble fraction of rat brain were measured during development (postnatal ages 4–55 days). For determination of specific tRNAs we developed a method that measured their capacities to bind specific amino acids. Levels of total tRNA were decreased in the soluble fraction from the brains of 55-day-old rats in comparison to those for the 4-day-old rats. The aminoacylation capacities of tRNAs for phenylalanine, lysine, proline, valine, leucine, alanine and isoleucine were diminished in the 55-day-old rats in comparison to those for 4-day-old rats when expressed per unit wet weight of brain. When the 4- to 55-day changes in aminoacylation capacity of each specific tRNA was expressed relative to that of the total tRNA, tRNA^Phe and tRNALys^Lys were diminished; tRNA^Pro, tRNA^Vel, tRNA^GIY and tRNA^Leu showed no significant changes; and tRNA^A1a and tRNA^Ile were increased. Incorporation of amino acids into a material insoluble in hot TCA (probably proteins) in a ribosome-free system occurred in the brain preparations. Out of ten different amino acids studied, arginine and tyrosine exhibited the highest values for this type of transfer.     

A NOTE ON THE ENUMERATION OF SULPHATE-REDUCING BACTERIA IN POLLUTED WATER AND ON THEIR INHIBITION BY CHROMATE

SUMMARY: A procedure for the estimation of sulphate-reducing bacteria in the presence of greater numbers of cysteine-decomposing bacteria is reported. Its application to an experiment on the control of nuisance during the wet tipping of domestic refuse showed that chromate is, in practice, a promising specific agent for preventing the nuisance caused by these bacteria.     

通过研究改性壳聚糖与细胞的相互作用评价其生物相容性

利用细胞生物学的方法, 研究了四种不同的细胞在经过改性的壳聚糖（ＣＨＩＴＯＳＡＮ） 膜上的生长,测定了细胞相对黏附力、细胞初始黏附率, 并利用ＦＤＡ 实验测定了细胞活力,从而从多个方面评价了这几种不同材料的生物相容性。实验结果表明,与明胶交联的壳聚糖膜明显比其它两种膜有利于细胞的黏附和生长,为进一步对材料进行筛选奠定了基础。     

高效液相色谱法测定红景天甙含量方法的研究

以高效液相色谱法作为红景天甙含量检测方法, 系统探讨了用超声法从高山红景天根中提取红景天甙用以制备分析样品的方法。确定的最佳提取条件为:以蒸馏水为提取溶剂在60℃下超声提取40 min。