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It can greatly promote carcinogenesis. DNA diluted alkali firer proves N-nitroso compounds induce the crosslinking between complementary DNA base pairs and initiate cell cancerization.

DNA城稀释过滤法证明,N-亚硝基化合物含氮杂环化借诱发DNA互补碱对之间的交联而启动细胞的癌变。

The best compost of catalytic-oxidation is scalpped by perpendicular experiment,the best fugitive conditions arestudied in the best of the reaction between sulphuric acid- potassium bromide and sodium iodate .

研究了在3.0mol/L的硫酸介质中,溴化钾催化碘酸钠氧化偶氮胂M褪色反应的适宜条件与影响因素,建立了催化动力学褪色光度法测定痕量碘的新方法。

The effects of lime dosage, microwave irradiation time and sensitizer on the removal of NH3-N were investigated.

采用微波辐照法处理氨氮废水,文章探讨了生石灰用量、微波辐照时间和敏化剂的加入对NH3-N去除率的影响,并做了水浴加热与微波辐照的对比实验。

Using Close-Top incubation method,we measured the N mineralization rate in soils (0~15 cm) of monsoon evergreen broadleaf forest,seasonal rain forest,rubber plantation,heavily disturbed seasonal rain forest,Millettia laptobotrya secondary forest and upland rice field.

在云南省中国科学院西双版纳热带生态站周围,用顶盖埋管法,对季风常绿阔叶林、季节雨林、橡胶林、受过严重干扰的季节雨林、鸡血藤次生林和旱谷地的氮矿化速率进行研究。

However, in the simulation, we found that the equilibrium between growing radicals and nitroxyl radicals was a CPU-intensive and time-consuming process, therefore, a hybrid algorithm with an analytical expression for the exchange equilibrium and with a biased sampling technique for those elementary reactions of small probabilities was used to improve the stochastic algorithm.

并发现,链自由基与氮氧游离基之间的偶合-解离平衡消耗大量的运算时间,为此用偏倚抽样法和杂化运算对模拟进行了改进,得到了与原始方法基本一致的结果,从而大大缩短了运算时间。

In the study, we established the animal model of diabetic ED successfully. Modern medical methods such as routine lightscopy, pathology, transmission electroscopy, scanning electroscopy, fluorospectrophotometer and radio-immunity were employed. From the aspects of pathomorphism, cellular supermicrostucture and neurocrine, we observed the mixture's effect on status of the whole animal model and penial erection, the fast plasma glucose, protein non-enzyme gycosylation, nitric oxide synthase , testosterone. In contrast with control groups, the mixture could apparently slow down the corpus cavernosum penial, vascular, neural pathologic progression of the diabetic rats and had a better result than diabetic pill, invigorating yang and restoring normal capsule and amino guanidine.

通过实验研究,成功建立了糖尿病性阴茎勃起功能障碍动物模型,利用常规光镜病理、透射电镜、扫描电镜、荧光分光光度计、放射免疫法等现代医学研究方法,从病理形态学、细胞超微结构、神经内分泌学等方面,观察了降糖起萎合剂对模型动物整体状态和阴茎勃起情况、空腹血糖水平、蛋白非酶糖基化、一氧化氮合酶、睾酮等实验指标的影响,与对照组比较提示降糖起萎合剂能明显延缓大鼠基于DM基础上的阴茎海绵体及血管、神经病变的病理进程,其疗效优于消渴丸、壮阳复春灵胶囊及氨基胍。

A chemical vapor depositionmethod for depositing high quality conformal tantalum/tantalum nitridebilayer films from inorganic tantalum pentahalide(TaX5)precursors and nitrogen is described.

描述了一种从无机五卤化钽(TaX 5 )前体和氮气中沉积形成高质量的保形钽/钽氮化物双层膜的化学气相沉积法。

H-acid is proposed as a self-coupling diazotizing reagent for the determination of nitrite and nitrate.

本文研究了NO_2~-与 H-酸的重氮盐自偶联反应,提出了一个灵敏的分光光度法,用于测定钢件磷化液中的NO_3,结果满意。

Using immunohistochemistry SABC technique, the location, distribution and density of nerve fibers immunoreactive to nitric oxide synthase Ⅰ were studied in the genital organs of the female Wistar rats during diestrus.

摘 要:实验采用亲和免疫组化SABC法对雌性大鼠动情间期一氧化氮合酶Ⅰ的正常分布进行了观察。

In this thesis, effects of common factors in yeast extract production with autolysis on yield and total amount of amino acid nitrogen in supernatant, degradation of RNA and saccharides during autolysis were studied, in which fresh baker\'s yeast was used as material. Extraction of 5\'-phosphodiesterase from barley rootlets was also studied. The optimum technology conditions of yeast extract production was determined by comprehensive considering results of above-mentioned study.

本论文以新鲜面包酵母为原料,研究了自溶法生产酵母抽提物过程中的影响因素对得率、上清液氨基氮总量、自溶过程中RNA降解及糖类物质降解的影响,同时还对麦芽根中5'-磷酸二酯酶的提取进行了研究,综合以上研究结果优化了酵母抽提物生产的工艺条件;此外,从酵母自溶残渣中提取了酵母细胞壁多糖,并对该多糖的乳化性及酯化修饰进行了研究,取得了下述主要研究结果。1。

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I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时,滚道或滚动元件褪色是很常见的特征。

The lawyer's case blew up because he had no proof.

律师的辩护失败,因为他没有证据。