三溴乙醇

The calcium was determined by xylenol orange-CTMAB-absolute ethyl alcohol complexation color in the gelatin.

以二甲酚橙—十六烷基三甲基溴化胺—无水乙醇络合显色体系测定了明胶中的钙。

Using modified apple fruit RNA extraction method based on CTAB by adding a step of using KAc and absolute ethanol to precipitate pectin, high-quality total RNA was extracted from the leaf and the inflorescence of jackfruit (Artocarpus heterophyllus Lam.). The yields of total RNA were 74.7 μg/g FW for the leaf and 31.6 μg/g FW for the inflorescence.

以菠萝蜜的叶片和花序为材料，采用改良的十六烷基三甲基溴化胺法（在原来的提取方法基础上，使用乙酸钾和无水乙醇预先沉淀果胶），成功提取菠萝蜜叶和花序的总RNA，平均产率分别为74.7μg/gFW和31.6μg/gFW。

To investigate the effect of surfactant self-assembling properties on the template synthesis of porous inorganic materials, the critical micelle concentration of surfactant cetyl trimethylammonium bromide was measured in both water and aqueous ethanol solvent using steady-state fluorescence techniques.

为了研究乙醇－水混合溶液中表面活性剂的自组装特性对多孔无机材料模板法合成的作用，采用稳态荧光法测定了乙醇－水混合溶剂的组成变化对十六烷基三甲基溴化铵临界胶束浓度的影响。

Ib was synthesized by condensation of phthalic anhydride with 2-methylresorcinol in fused AlCl〓/NaCl (5∶1), followed by selective acetylation, methylation, NBS bromination and condensation with sodium ethoxide.

邻苯二甲酸酐在熔融的三氯化铝-氯化钠(5：1)中和-2，6-二羟基甲苯环合得1，3-二羟基-2-甲基蒽醌〓后经选择性乙酰化、甲基化、NBS溴化、乙醇钠缩合得1-甲氧基-2-乙氧甲基-3-羟基蒽醌。

Catalyzed by indium tribromide as a Lewis acid catalyst, this reaction was completed smoothly in green solvent ethanol.

我们采用三溴化铟作路易斯酸催化剂，在绿色溶剂乙醇中顺利实现了该反应。

The invention uses the fermentation liquor of one Escherichia coli generating polysialic acid as material, filters and removes thallus, adds some solvents as sodium chloride and alcohol into supernatant to deposit polysialic acid, dissolves the polysialic acid deposits via deionized water, filters to remove modified protein, uses alkali prolease to treat filtrate, complexes deposits via cetyl pyridinium chloride or cetyltrimethylammonium bromide, and dissociates, uses over alcohol to deposit polysialic acid, dissolves the deposits via ultra-pure water, grades and purifies via chromatography column, collects and dialyzes eluent, cools and dries to obtain polysialic acid.

本发明以一株产聚唾液酸大肠杆菌的发酵液为原料，经过过滤去除菌体，上清液加入适量氯化钠和乙醇等溶剂沉淀出聚唾液酸，聚唾液酸沉淀用去离子水溶解，再用过滤去除变性蛋白质，滤液经过碱性蛋白酶处理、氯代十六烷基吡啶或十六烷基三甲基溴化铵络合沉淀并解离后，再用过量乙醇沉淀出聚唾液酸，聚唾液酸沉淀用超纯水溶解，用层析柱进行分级纯化，收集洗脱液经过透析，冷冻干燥得聚唾液酸产品。

In an acetate buffer of pH 6.0,and in the presence of CTMAB,a stable complex,having the mole ratio of 1 to 3,was formed between cobalt ion and nitroso R salt,which was concentrated on C18 solid phase extraction column,achieving a concentration multiplication of 100 times.

研究了用亚硝基R盐离子对固相萃取光度法测定钴，在pH 6.0的HOAc-NH4OAc缓冲介质中，溴化十六烷基三甲基铵存在下，亚硝基R盐与钴反应生成3∶1稳定络合物，该络合物可用C18固相萃取小柱富集，富集倍数达100倍，小柱上富集的络合物用乙醇洗脱后用光度法测定，钴的质量浓度在0.05~5.0 mg.L-1内符合比耳定律。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了