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In this work, the problems of spectrum, quantum yield and lifetime of Phosphoresconce, photosensitization and photostabilization of polymeric acetophenone and its derivatives have been studied.

本工作合成和研究了高分子苯乙酮及其衍生物的光谱、磷光量子产率、磷光寿命以及光敏化、光稳定等问题。

Influences of the nature of the electrodes, the workingpotentiasl, the passed charge and the concentration of acetophenone on theelectrocarboxylation have been studied.

首先运用循环伏安法研究了苯乙酮的电还原行为。

The effects of the mass ratio of polyvinyl alcohol and chitosan,the volume of acetum,the concentration of crosslinker on swelling ration are studied and optimized using orthogonal experimental method.

凝胶溶胀度随着聚乙烯醇与壳聚糖质量比、交联剂戊二醛浓度的增大而减小，随着溶剂醋酸溶液体积增加而增大

Removal techniques of pesticide residues in cabbage leaves surfaceRemoval efficacies of organophosphates, orgnaochlorine (p,p-DDT andγ-666), pyrethroids and fungicide chlorothalonil residues in cabbage leaves surface caused by different concentrations of salt solution, acetum, tap water, refrigeration and cooking were simulation studied in laboratory.

蔬菜叶片表面农药残留日常去除技术在实验室模拟了不同浓度的盐溶液、醋酸溶液，自来水，冷藏和烹饪对甘蓝叶片表面有机磷农药、有机氯农药(p，p-DDT、γ-666)、拟除虫菊酯农药、杀菌剂7种农药的去除效果。

The extract of acetyl acetate have been studied on inhabited effect of 4 species bacteria.

乙酸乙酯萃取物对4种细菌的抑菌试验表明，其对枯草芽孢杆菌的抑制效果最好。

The effects of the kind and amount of solvent used, reaction time and the amount of catalyst and acetylation reagent on the reaction were studied.

讨论了溶剂体系及用量、反应时间、催化剂用量、酰基化试剂用量等对反应的影响。

We also studied the properties of single acetylcholine channels of muscle membrane.

并进而研究了与此有关的肌细胞膜上乙酰胆碱受体通道的性质。

Methods: Tumor cell-platelet adhesion of highly metastatic SACC-LM, non-metastatic SACC-83 and effect of aspirin, arginine-aspartate , magnesium acetylsalicylate on adhesion were studied in vitro. Antimetastatic effect of aspirin, RD, magnesium acetysalicylate on experimental metastasis of SACC was observed in vivo.

体外实验观察高转移潜能的SACC-LM细胞、非高转移潜能的SACC-83细胞与血小板的粘附，阿斯匹林、阿斯匹林镁、精氨酸-天冬氨酸（arginina-aspartate，RD）对SACC-LM细胞与血小板粘附的影响；动物实验观察阿斯匹林、阿斯匹林镁、RD对SACC-LM细胞实验性肺转移的作用。

Methods:32 cases of closed rupture of the achilles tendon admitted from 1983 to 1998 were studied retrospectively.

对1983～1998年收治的32例病人进行回顾性分析。

And, as anyone who has studied chemistry at school knows, if you drop chalk into acid it fizzes away to nothing.

并且，凡是学过化学的人都知道，把粉笔放到酸性溶液中，粉笔就会嘶嘶作响消失殆尽。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。