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Through the comprehensive analysis of operation and the external performance of flex break and chapping of the buna-N apron,considering the problems occurring in the operation,conclusion is made that on-going modification of the system of the buna-N and PVC is an important access to the improvement of quality and service life of buna-N apron.

通过对腈胶圈的运行状态、屈挠断裂、龟裂的表象特征等的详细分析,结合实际使用中出现的问题,说明腈橡胶和PVC并用体系的不断改型是提高腈胶圈质量,延长使用寿命的重要途径。

The emission amount of tail gas in polyisobutylene succinimide production is very large,and the concentration of oil in the recovered chlorhydric acid by absorption is too high to sell.

针对聚异二酰亚胺生产工艺中废气排放量大、尾气吸收得到的盐酸含油量高、难以销售等问题,在分析原因的基础上,对尾气吸收系统进行了技术改进。

Does Huazhong University of Science an Technology have studying clinically with helping medical college middle applying to fibre laryngoscope go over to chlorhydric acid Dingkayin glue thick fluid?

华中科技大学同济医学院对盐酸卡因胶浆在纤维喉镜检查中应用有临床研究吗?华中科技大学同济医学院对盐酸卡因胶浆在纤维喉镜检查中应用有临床研究吗?

Synthesis of n-butyl chloroacetate from chloroacetic acid and n-butanol in the presence of stannic chloride pentahydrate was studied.

在五水四氯化锡存在下,由氯乙酸和正醇合成氯乙酸正酯。

Results: A total of 18 kinds of SVOCs were qualitatively and quantitatively analyzed, the main compounds deteced were dimethylphthalate, diethylphthalate, dibuylphthalate, bis (2-ethylhexyl) phthalate, phenol, chrysene, benzo anthracene, benzo fluoranthene, benzo perylene, indeno (1, 2, 3-cd) pyrene, dibenzo anthraeene.

结果:定性定量检出邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二酯、双(2-乙己基)邻苯二甲酸酯、邻苯二甲酸二辛酯、基苄基邻苯二甲酸酯、苯酚、4-甲基苯酚、萘、荧蒽、芘、屈、苯并蒽、苯并荧蒽、苯并荧蒽、苯并二萘嵌苯、茚并(1,2,3-cd)芘和二苯并蒽18种优先控制有机污染物。

Results: The 12 kinds of toxicants including methyl acetate, ethyl acetate, benzene, toluene, ethylbenzene, butyl acetate, p-dimethylbenzene, m-dimethylbenzene, o-dimethylbenzene, n-butanol, cinnamene and cyclohexanone were separated well. Good linear relationship sensitivity and reproducibility were obtained and detection limits (S/N=3) of them were 0.2 mg/l respectively. Conclusion: In this paper, a new method for simultaneous determination of 12 kinds of toxicants by using gas chromatography has been described.

结果:对乙酸甲酯、乙酸乙酯、苯、甲苯、乙酸酯、乙苯、对二甲苯、间二甲苯、邻二甲苯、正醇、苯乙烯、环己酮12种有毒物质的分离效果好,线性和重现性均较好,方法的检测限达到0.2 mg/L。

Synthesis technology of cinnamyl methyl fumarate containing α,β-unsaturated carbonyl group and its antimicrobial activity was studied.

以α,β-不饱和羰基结构为母体设计合成反烯二酸桂醇甲酯,并对反烯二酸桂醇甲酯的抗菌活性进行了研究。

Anthraquinone is prepared by the liquid phase oxidation of anthracene with oxygen in the presence of cobaltous salt,manganous salt and bromide.

在液相中,钴盐、锰盐、溴化物催化氧气氧化蒽制取蒽醌,当压力为0.5~0.8 MPa,溶剂是芳香性卤代烃和酸的混合物(其中酸质量分数为15%~20%)时,蒽醌的产率可达90%,纯度99.2%。

Immunogold labeling demonstrated that there was no chitin and cellulose in young and thin conidial walls; chitin appeared in the well-developed wall in later stage of conidial development and little cellulose, however, was detectable in the wall of mature conidia.

免疫金标记结果显示,幼嫩的分生孢子壁中缺乏几质和纤维素,只有在成熟的分生孢子壁中含有几质;出乎意料的是在成熟分生孢子中发现有少量纤维素的存在。

The determination of reducing sugar ,chitinase, soluble protein content of three cell inclusions to Hyphae within the cells and found that the different trend over time: the reducing sugar content of synergistic mixture so that in 25 h, the decline for the contrast of 18.91%; chitinase activity in between 5~20 h increased; soluble protein contently increased by the subsequent and decline in the short term.

测定菌丝细胞渗漏的还原糖、几质酶、可溶性蛋白等三种细胞内含物含量,发现其随时间变化趋势不同:增效组合使还原糖含量在25 h时,下降为对照的18.91%;几质酶活性在5~20 h之间增加;可溶性蛋白含量短期内上升随后下降。

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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.

老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。