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Thus, it is no wonder that the explorations of the influence of the outer conditions on the structures and properties of Uracil have become a prime importance area in chemistry and biology.

因此,不同外界因素对核酸碱基脲嘧啶结构和性质影响的研究是一个很重要的领域。

Uracil, which forms part of these compounds, has already become the hot topics of many studies because of its biological and pharmaceutical activities.

脲嘧啶作为核酸碱基的组成部分,具有重要的生物学和药物学意义。

The results show that the plant communities naturally colonizing on the wastelands markedly increased enzyme activities (urase, arylsulfatase, alkaline phosphatase and dehydrogenase) in the upper layer of the tailings (0~5 cm).

结果表明,自然定居在尾矿废弃地上的植物群落类型能够显著影响表层尾矿中(0~5cm)的脲酶、芳基硫酸酯酶、碱性磷酸酶和脱氢酶的活性。

As a representative of developing organic piezoelectric materials, odd nylons , vinylidene cyanide copolymers and polyurea, their application fields could be expanded com.

以奇数尼龙、亚乙烯基二氰共聚物及聚脲为代表的发展中有机压电材料,可望明显地扩展PVDF家族的应用范围,但它们中的大多数仍待产业化。

Microwave; polymerization; Methacrylic acid; 2- ethyl ester; Allylthiourea; Polymer-Metal Complexes; catalyze; adsorption.

微波; 聚合;甲基丙烯酸N; N-二甲胺乙酯;烯丙基硫脲;高分子金属配合物;催化;吸附

The excised leaf of Phalaenopsis RSW1 was used as explants, the effects of basic media, kinds and concentrations of 6-benzyl aminopurine (6-BA) and thidiazuron, dark culture phase, and leaf age on adventitious shoot regeneration from leaves of Phalaenopsis RSW1 were investigated.

以蝴蝶兰品系RSW1离体叶片为外植体,探讨了基本培养基、6-苄基腺嘌吟(6-BA)和噻重氮苯基脲、暗培养时间及叶片生育期对叶片不定芽发生的影响。

Quick vulcanization adjuvant, and said adjuvant includes dithioalchol benzothiazole, dibenzothiazole disulfide, tetra methylthiuram disulfide, zinc methyl phenyl dithio carbamate and ethyleen thiourea.

助剂是:二硫醇基苯并噻唑、二硫化二苯并噻唑、二硫化四甲基秋兰姆、甲基苯基二硫代氨基甲酸锌、乙烯硫脲。

The process is that chromium yeast is first washed after centificating from the cultural medium and dried and then determined by Biphenyl Carbazide Method.

确定了比较合适的有机铬检测方法:酵母粉进行振荡浸泡(100rpm)10h后,洗涤离心干燥,然后采用二苯胺基脲法检测有机铬含量。

Part two: Using chloroformic ester reacted with potassuim thiocyanate to get thiocyanic esters. Then reacted with biological substituted pyrimidinamine to synthesize forty two thiourea compounds, thirty eight of them are new compounds. Their structures have been charactered by IR, 1H NMR and elemental analysis.

第二部分:先以氯甲酸酯和硫氰酸钾为原料合成异硫氰酸酯,再与有生物活性的取代氨基嘧啶反应,合成了一系列新的取代嘧啶基硫脲类化合物,合成的42个化合物中有38个为首次合成的新化合物,结构经元素分析、IR及~1H NMR得到确证。

Aqua, Sorbitol, PPG-1 PEG-9 Lauryl glycol ether, Hydrolyzed elastin, Hydrolyzed wheat gluten, Hydrolyzed collagen, Hydrolyzed glycosamino-glycans, Humulus lupulus, Propylene glycol, Triethanolamine, Sodium hydroxide, Carbomer, Maris limus extract, Ostrea extract, Imidazolidinyl urea, Parfum, Benzyl salicylate, Coumarin, Alpha isomethyl ionone, Hexyl cinnamal, Buthylphenylmethylpropionate, Linalol, Methylisothiazolinone, Methylchloroisothiazolinone.

水,山梨醇, PPG 公司- 1聚乙二醇- 9十二烷基醇醚,水解弹性蛋白,水解小麦面筋蛋白,水解胶原蛋白水解粘多糖,多聚糖,啤酒花提取物花,丙二醇,三乙醇胺,氢氧化钠,卡波姆,马里斯提取物,牡蛎提取物,咪唑烷基脲,香水,水杨酸苄酯,香豆素,阿尔法 l 紫罗兰酮,己基肉桂醛,丁苯基甲基丙醛,芳樟醇,甲基异噻唑啉酮,甲基氯异塞唑晽酮。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。