查询词典 chemical change

In addition, the change of chemical structure and pore structure of cellulose during carbonization was also investigated.

采用了TG、XRD、FTIR、SEM等技术对纤维素在炭化过程中的分子变化进行了分析。

The rocks change in both chemical and physical ways.

岩石的改变包括物理和化学的方法。

Most cataracts are caused by a change in the chemical composition of the lens.

大多数白内障都是因为晶状体内的化学成份改变引起的。

Common salt, although dissolved in water, does not change its chemical properties.

尽管食盐溶于水，但其化学性质不变。

B. Even though we dissolve the salt in water, we cannot enable common salt to change its chemical properties.

即使我们将普通食盐溶于水，也不能改变其化学性质。

The change trends of conodont chemical elements coincide completely with that of sedimentary environments.

本文首次研究了牙形石地球化学特征，其元素含量变化趋势与环境演替相吻合。

Chen Weimin%Guo Xiaoming Annual change in zooplanktonic crustacea and their relationship with physico-chemical factors in Chonghu Lake International Journal of Ecology and Environmental Sciences , 1987,null

陈伟民%秦伯强太湖梅梁湾冬末春初浮游动物时空变化及其环境意义湖泊科学， 1998，(4)黄祥飞湖泊生态调查观测与分析北京：中国标准出版社， 1999，null

In order to enhance heat transfer efficiency of reboiler which is widely used in petroleum and chemical system, phase change heat transfer and friction characteristics in several heat transfer enhancement tubes are studied, With a view to approach practical circumstances, cumene is chosen as organic working medium.

为了提高石化系统再沸器的传热效率，本文研究了几种强化沸腾与冷凝管的传热与阻力特性。为接近实际条件，选用异丙苯为工质。

The apparent degradation reaction activity energy of PET and PC are evaluated to be 27. 19kJ. mol〓 and 35. 75kJ. mol〓 in system noncritical region respectively. The mass transfer and scatter, which are the controlling factors of degradation in system noncritical region, change into chemical reaction in system critical region, where the activity energy of PET and PC are evaluated to be 89. 79kJ. mol〓 and 80.61kJ. mol〓 respectively.

在系统的非临界区域，PET、PC的降解为液固相反应，反应速率很低，其降解反应表观活化能分别为为27.19KJ.mol〓和35.75KJ.mol〓，为传质、扩散控制；在系统的临界区域，PET、PC的降解为液态均相反应，降解反应速率显著提高，其降解反应表观活化能分别为89.79KJ.mol〓和80.61KJ.mol〓，为化学反应控制。

Ery digester is increased about 1 %, the change of pressure reduced 91 %, the amount of chemical reduced 8

纸厂蒸煮车间的投运后运行稳定，Kappa 值的均方差减小约20 %，单锅产量提高约1 %，蒸汽压力波

No clear conclusions can be made about the predictie alidity of specific measures, they found, except for criteria for the underuse of drugs for cardioascular disease.

除了心血管病不合理用药标准外，对于特定评价方法的预测效度没有明确的结论。

The third and last is that almost all of them, being infinite in number, have been impostures, and by idle and crafty brains merely contrived and feigned after the event past.

第三、即最后一点是：几乎所有这些不胜枚举的预言都是欺人之谈，都是在事件过后由无聊而狡猾的脑筋推测与凭空捏造的。