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The treatment with 0.05% activated charcoal produced 24 embryos per plate,which increased 1.7 embryos per plate,as compared with the treatment without activated charcoal.

对甘蓝型油菜小孢子培养再生植株的染色体加倍及移栽的研究结果表明,在小孢子培养初期加50mg/L秋水仙碱加倍效率最佳,加倍率达到67.6%。

The aim of this study is to evaluate the efficacy of the combination of vinorelbine and cisplatin in the treatment of advanced NSCLC.

本研究的目的旨在分析去甲长春花碱加顺铂联合化疗治疗晚期非小细胞肺癌的临床疗效。

The Hamming value of even bits Vh′ in DNA sequence represents the number of purine base and the Hamming value of odd bits Vh is the number of keto base.

7通过按位加运算求得DNA序列的汉明距离dh,碱基距离dh′,基团距离dh和共轭距离dG以及这些距离的意义与联系。

Vmutageniz, We gained a stain of Aspergillus niger S13 with high cellulase production, Further more we research on the optimum solid culture a wheat stem 70 % bran 30 %, nitrogen source is yeast extract 0.68%,(NH4)2SO4 0.35%, trace element 0.1%, Vogel's solution 4 %, pH3.5, temperature 30℃, cultivation time 72-96hr, With such condition, its β-glucosidas activity reached 801.18mg·glucose/g·h, CMCase activity 6262.46mg·glucose/g·h filter paper activity 20.73IU.

本文通过分离筛选和紫外诱变法,选充出一株高产纤维素酶黑曲霉菌株S13,并进行了最佳固态发酵培养条件的研究,其结果为:最佳碳源为1%碱洗麦杆粉70%,麸皮30%;另加酵母膏0.68%,(NH_4)_2SO_4 0 35%,微量元素0.1%,Vogel's母液4%,初始pH3.5培养温度30℃,培养时间为72~96 小时,在此条件下其β-葡萄糖苷酶活力达801.18mgG/h·g,CMC酶活6262.32mgG/h·g,滤纸酶活20.73IU。

Production of epsilon-glycolylnium is carried out by Beckman rearrangement reacting for cyclohexanone-oxime under the existence of solvent to obtain epsilon-glycolylnium contained mixture, crystalline separating for the mixture to obtain crude epsilon-glycolylnium crystal, dissolving by arene, extracting by water, adsorbing by resin hydrogenation catalyzing to obtain the final product. The value of potassium permanganate is less than 5, extinction value is less 0.05, volatile alkali is less than 0.5meq/kg and alkalinity is less than 0.05meq/kg.

本发明涉及一种ε―己内酰胺制备方法,其特征为:在溶剂存在下,环己酮肟经贝克曼重排反应,得到含有ε―己内酰胺的混合物,该混合物结晶分离后,得到粗ε―己内酰胺晶体用芳烃溶解,然后用水萃取,再经树脂吸附、催化加氢后,得到99.995%以上的高纯度的ε―己内酰胺,其质量指标为高锰酸钾值小于5,消光值小于0.05,挥发性碱小于0.5meq/kg,碱度小于0.05meq/kg。

Axial group, substitution on the aromatic rings of SalenAlX, and co-catalyst all affect catalytic properties of these aluminum complexes.

设计合成了一系列四齿席夫碱铝配合物,它们可以溶解在超临界CO〓/环氧乙烷混合物中,是CO〓和环氧烷烃环加成反应的有效催化剂。

The result indicates that the big π bond of benzene not only turns benzene into a Lewis base,but also makes it to undergo electrophilic substitution (halogenation,nitration,sulfonation and so on),rather than addition

结果表明,苯的环状大π键结构不仅使苯成为1个Lewis碱,而且使苯容易发生卤代、硝化、磺化等亲电取代反应,但不易发生加成反应。

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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。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力