查询词典 reagent

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

The letterpress adopts the suitable solid reagent to take the place of the liquid sour and the organic reagent in the Diphenylcarbazide hydrazine intensity of light method (GB7467-87) to mensurate. hexavalent chromium in water.. It has carried out the rapid mensuration of chromium in water using entire solid commixture reagent and it selects affecting condions of the mensuration and maks the optimization .

为应对突发性水污染事故的现场应急监测， 2006年我中心购置的美国哈希便携式DR/2400型多参数仪，该设备适用于地表水和地下水等环境水中铬的测定，是一种准确、灵敏、快速、简便的测定仪，在2006年陕西镇安5-30水污染事故的应急监测中发挥的极其重要的作用，但由于该仪器所使用的试剂是专用的试剂，其价格昂贵、购置麻烦。

To study the sedimentation coefficient of ribosomal RNA from Saccharomyces cerevisiae,the enzymolysis method and the liquid nitrogen grounding method combined with Trizol Reagent were used for total RNA extraction from Saccharomyces cerevisiae.RNA extraction in Mus musculus Kunming and Danio rerio,was also involved in,which was set as control.

为研究酿酒酵母菌核糖体RNA的沉降系数，用酶解法和液氮研磨法裂解酿酒酵母菌的细胞壁，Trizol Reagent提取其总RNA，同时提取小白鼠和斑马鱼的总RNA进行比较。

Objective To analyse the clinical application quality of four kinds of uricase reagents:dry simple reagent of Changzheng company;liquid double reagent of Shanghai Kehua;liquid double reagent of Shanhai Shennergy-Diasys;liquid double reagent of Beijin Leadman.

目的 了解不同厂家四尿酸酶试剂即长征公司尿酸干粉单试剂、上海科华公司尿酸液体双试剂、上海申能公司尿酸液体双试剂、北京利德曼公司液体尿酸双试剂的临床应用质量方法对不同厂家尿酸试剂的精密度、线性、回收试验、干扰试验的比较以及试剂稳定性的观察。

ReShi Chemicals is a specialist in manufacturing and distributing metal surface treatment reagent: phosphorus treatment reagent, water treatment reagents, electro-plating additive reagents, normal temperature nigrescence reagent, pre-treatment reagents ,etc.

是一家专业从事金属表面处理药剂：磷化处理药剂、水处理剂、电镀添加剂、钢铁常温发黑剂以及前处理产品的生产商和代理商。

In which F is the water equivalence factor of the Reagent; X is the volume, in mL, of the Reagent added after introduction of the specimen; X is the volume, in mL, of standardized Water Solution required to neutralize the unconsumed Reagent; and R is the ratio, V/25 (mL Reagent/mL Water Solution), determined from the Standardization of Water Solution for Residual Titration.

其中F是试剂与水的等价因子；X加入样品后加入的卡尔试剂体积，单位ml；X是标准水溶液中和未反应试剂所消耗的体积，单位ml，R是一个比值，V/25（单位卡尔试剂/单位标准水溶液）。

With the pHysical and chemical method this paper studies the bleach technology of the Waste edible oil from catering trade, has respectively discussed the bleachmechanism of the Waste edible oil with three bleach reagents of different types--active bleaching earth, Diaobaikuai and peroxide. On the base of discussing the influencing factor of bleachability, reaches three bleaching technology conditions. After comparing the bleach effect between the unitary bleach reagent and the match bleach reagent ,selects the best bleach reagent and its bleach technology condition.

采用物理和化学的方法研究餐饮业废油脂的脱色工艺，分别探讨了不同类型的脱色剂——活性白土、雕白块和双氧水对废油脂脱色的机理；在讨论了影响脱色率因素的基础上，研究出三者脱色的工艺条件；并对比了单一脱色剂脱色效果以及脱色剂复配的脱色效果；筛选出最佳的脱色剂及其脱色工艺条件。

Experimental results have shown that if pentaerythritol or starch are used as coking reagent,and if the proportion of deaquation catalyst to coking reagent to bubbling reagent is 5∶1 5∶3 5 and the ratio of blending stock to basic paint material is 7∶3,the fire retardant paints will relatively achieve its best fire resistant properties.

实验发现，采用季戊四醇、淀粉作为成炭剂，脱水成炭催化剂∶成炭剂∶发泡剂＝ 5∶1.5∶3.5、填料∶漆基料重＝ 7∶3时，涂料的防火性能较佳。

The light-conversion and helminthic polyethylene greenhouse film was prepared using fluorescence material as the light-conversion reagent; fluenoxuron and acetamiprid as the helminthic reagent; and talcum powder as the heat-preservation reagent.

以荧光材料为转光剂、氟虫隆与乙虫脒为驱虫剂、滑石粉为保温剂，制成转光驱虫聚乙烯农用薄膜，考察了转光剂对荧光发射光谱、驱虫剂对驱虫率、滑石粉对红外透过率的影响，并进行了农田应用研究。

Methods: The specimens of peripheral blood were collected from 15 individuals and each specimen was divided into three parts, one processed in an hour and the other two stored at -80℃ and -20℃ respectively Two different reagents (TRI Reagent and TRI Rcagent-BD) were used to extract RNA directly from whole blood followed by reverse-transcription polymerase chain reaction for amplifying 3-Actins gene. The RT-PCR products were detected by the ultraviolet transilluminator after 1.5% agarose gels electrophoresis and being stained by ethidium bromide.

采集人体外周血标本15例，分成三份，分别作为新鲜血组、-80℃冻存血组和-20℃冻存血组标本，用TRI Reagent和TRI Reagent-BD两种不同的试剂提取RNA，以RT-PCR方法扩增β-Actin基因，经1.5%琼脂糖凝胶电泳，溴化乙锭染色，紫外透射仪下观察分析。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。