氯乙酸的

The dependence of concentration of free sodium hydroxide,hydrolyzation ratio of sodium chloroacetate,degree of substitutionand solution viscosity of product on reaction conditions in the synthesis of polyanionic cellulosein various alcohol mediums are studied.

研究了溶剂法合成聚阴离子纤维素过程中游离碱浓度、氯乙酸钠水解率和产品取代度及其溶液粘度与反应条件的关系。

Results showed that chloroacetic acid was the best reagent for esterification and the catalyst had satisfactory catalytic activity and selectivity.

实验结果表明，氯乙酸是最佳酯化剂，催化剂具有较强的活性及选择性。

Results The infra-red spectragram of the derivate showed the chitosan had been modified by chloroacetic acid.

结果修饰后的衍生物经红外图谱分析表明，壳聚糖已被氯乙酸所修饰。

The phase transition and states of the lyotropic liquid crystals of chitosan in dichloroacetic acid were studied by polarized microscopy.

借助偏光显微镜研究了不同壳聚糖样品在二氯乙酸中的液晶相转变和液晶状态。

Objective Applying randomized terminal linker-dependent PCR to detect the DNA damage of ras gene induced by dichloroacetic acid.

目的研究二氯乙酸(dichloroacetic acid，DCA)对ras基因的DNA损伤作用，探讨其致癌作用分子机制。

The lyotropic liquid crystal morphology of polycaprolactone/ethyl cellulose blends in dichloroacetic acid has been studied by a polarizing light micrograph.

利用偏光显微镜研究了乙基纤维素与聚己内酯共混物在二氯乙酸中的溶致性液晶形态。

The critical concentrations in dichloroacetic acid were 0.005,0.015,0.035 and 0.050 respectively for chitin with the molecular weight 2.84×106,1.47×106,9.4×105 and 5.3×105 prepared from different sources.

甲壳素分子量为2.84×106、1.47×106、9.4×105和5.3×105时，在二氯乙酸中的临界浓度分别为0.005、0.015、0.035和0.050。

136 cases of pointed condyloma were treated in the center. The surface of the lesion area was first treated with dichloroacetic acid for 15 minutes, and washed with normal saline, then MEBO was applied to the lesion area. MEBO was applied every 6 to 8 hours(3 to 4 times a day) and 8 cases of the same disease were treated with MEBO 2 times a day(every 12 hours), 3 cases with large lesion areas were treated more frequently.

用二氯乙酸涂抹疣体表面15分钟，再用生理盐水擦洗，即于疣体表面及带部涂MEBO.136例患者每6小时～8小时给药一次，8病例每12小时用药一次，疣体较大范围较广泛的3例患者，增加换药次数，并行分期治疗。

In fact, Kjeldahl method is not difficult to make up for deficiencies, as long as a multi-step process: first TCA to deal with samples.

其实凯氏定氮法的缺陷并不难弥补，只要多一道步骤即可：先用三氯乙酸处理样品。

The optimal conditions were obtained that isopropanol concentration 95% mass ratio of sodium hydroxide to soybean dietary fiber and monochloracetic acid 1.00:1.25:1.20, alkalization time 60 minutes, etherification temperature 70 degrees C, and etherification time 120~150 minutes.

以大豆膳食纤维为原料，一氯乙酸为醚化剂，异丙醇为溶剂，制备了羧甲基大豆膳食纤维，研究了异丙醇溶液质量分数、NaOH用量、MCA用量、碱化时间、醚化温度、醚化时间对产品羧甲基质量分数的影响。

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。