查询词典 reagents

In order to ensure the accuracy of the result, the well known brand reagents with high quality and full proof of market should be selected. The reagent can not be chosen only for its cheap price.

为保证检测结果的准确性，一定要选择品牌老，经过市场充分论证的试剂，不可因为便宜随意招标试剂。

This review covers the recent advances on the asymmetric addition reactions of alkylzinc reagents with imines .

综述了烷基锌与亚胺不对称加成反应的最新进展。

Catalytic enantioselective reduction of imines and enamines represents one of the most straightforward and efficient methods for the preparation of chiral amines, which are not only important building blocks of many natrural products and chiral drugs, but also can serve as useful resolution reagents, chiral ligands and chiral catalysts.

中文摘要手性胺不仅是许多天然产物和手性药物的重要结构单元，而且也是非常有用的拆分试剂、手性配体和手性催化剂。

Moreover, we substituted potassium carbonate and Raney Ni for some expensive reagents. We made progress in the basic work of synthesization of ethyl pyruvate p-nitro-phenylthydrazone and indol. Through above improvement, the simple and convenient process with lower costs make it appropriate to be used in the industrial production.

在实验过程中，我们改进了羧酸与仲胺的缩合条件，使产率可达到90％以上，用碳酸钾和Raney Ni或Pd／C代替了昂贵的进口试剂的使用，改进了合成苯腙和吲哚的后处理方法，使整个合成路线的收率提高，成本降低，操作简单，更适合工业化的要求。

Companies are producing various specifications heptane, n-heptane, iso-octane, n-hexane, and environmental protection-type special solvent oil, 120 # solvent oil, industrial products and reagents, welcome customers at home and abroad came to negotiate and buy.

公司现生产各种规格的庚烷、正庚烷、异辛烷、正已烷、环保型特种溶剂油、120#溶剂油等工业品和试剂，欢迎国内外客户前来洽谈、选购。

This company mainly deals with reagents of biochemistry, immunology, cell biology, molecular biology consumptive material and laboratory apparatus, etc. It has its own independent laboratory of molecular biology and immunology. It is a specialized company incorporating development, production, sales marketing and services into an organic whole.

本公司主要经营生化试剂、免疫学试剂、细胞生物学试剂、分子生物学试剂及耗材、实验仪器等，建有自己独立的分子生物学、免疫学实验室，是集开发、生产、销售、服务于一体的专业公司。

After being oxidated for 34 h, and then the contents of Fe2+ in the 9K liquid solution with 4×10-4mol/ L xanthates, dithiophosphates and D-250 added inreased from 4.03 g/L to 4.64, 4.77 and 5.91g/L, respectively. After leaching for 35 d, the leaching rates of Zn are 92% and 61% respectively. It shows that the flotation reagents (xanthates, D-250) have great effect on the activity of bioleaching bacteria.

研究结果表明：添加4×10-4mol/L的丁基醚醇、乙基黄药、丁胺黑药，氧化34 h后，使 K液体培养基中的Fe2+质量浓度由4.03 g/L分别增加至4.64 g/L， 4.77 g/L和5.91 g/L；浸出35 d后，精矿中的浸出率分别为92%和61%，这进一步验证了浮选药剂对浸矿细菌活性的影响。

Manganese compounds, in which it has various valences, are used in fertilizer s and textile printing and as reagents and raw materials.

以各种原子价存在的锰化合物被用于化肥生产和纺织染印，还被用作试剂和原料。

In this experiment, BSA and chitosan are taken as cross-linking reagents, and nanoparticles gel and uricase are cross-linked on egg membrane.

本研究将改性纳米SiO_2凝胶和尿酸酶通过交联剂固定于蛋膜上，将酶膜紧贴于铂盘电极表面，然后以自制铂片电极为对电极、甘汞电极为参比电极，组成三电极体系，测定体液中尿酸的浓度。

So even if the bugs and their secreted proteases do not chop your sample into bits, they can degrade reagents, alter the pH of the solution, or generate chemical species which can influence crystallization and even make reproducing conditions a pain in the tush.

就算这些可恶的家伙们没有将你的样品&嚼碎&，它们也可能影响你的试剂，改变溶液的pH，产生可能干扰结晶的化学物质，使得你的实验很难重复出来。

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。