化学分析

TEM shows that drying by direct heating might result in hard aggregation of the tourmaline powder, while hard aggregation might be avoided by azeotropic distillation. Raman spectroscopy reveals that there are O_H and C_H on the surfaces of the tourmaline powder obtained by azeotropic distillation, which indicates that butoxy is chemically adsorbed on the surfaces of tourmaline particles, but not adsorbed on those formed by direct drying. X_ray powder diffraction shows that the intensity of diffraction peaks decreases after grinding. There is no damage to the tourmaline crystal lattice in the process of direct heating, azeotropic distillation, or ultrafine grinding.

透射电镜分析结果表明，直接加热脱去水或正丁醇会使电气石超细颗粒发生硬团聚，而共沸蒸馏法则可有效防止硬团聚的产生；拉曼光谱结果表明，共沸蒸馏法制备的电气石粉末表面存在O—H和C—H键，说明正丁醇在颗粒表面为化学吸附，而直接干燥法得到的电气石粉末表面则没有；X射线粉晶衍射结果表明，研磨过程降低了粉末衍射峰的强度，但直接加热干燥和共沸蒸馏干燥均未破坏电气石的晶格结构。

The compositions of the essential oil from the leaves of Callicarpa formosana Rolfe in Guangdong Province were analyzed by means of GC-MS technique, and 48 chemical constituents, accounting for 90.14% of total content were identified.

采用气相色谱-质谱联用对杜虹花叶挥发油的化学成分进行分析，并用DPPH法测定其抗氧化活性。

Their adsorption rate on the molecular sieve catalysts surface and the stability of their carbonium ions were then obtained based on the molecular simulation on these molecules from their dipole moment, 2-dimensional electrostatic potential energy contours and 3-dimensional electrostatic potential energy isosurface.

采用半经验的AM1量子化学计算方法和静态理论，分别考察了噻吩、 3 甲基噻吩和 2 ，5 二甲基噻吩分子结构特性的不同，从偶极矩、各自垂直于芳香环平面的二维电势能分布曲线和整个分子周围三维电势能分布情况等方面分析了它们在分子筛催化剂表面吸附速度的快慢和生成正碳离子稳定性的高低，进一步比较了噻吩及其衍生物所生成的正碳离子进一步反应的能量变化，从而可判断噻吩及其衍生物裂化脱硫速度的快慢，噻吩及其衍生物裂化脱硫的速度由大到小分别为：2 ，5 二甲基噻吩、 3 甲基噻吩、噻吩。

Methods: The expression of GHR were detected by immunohistochemistry technique in cancer specimens and paired normal esophageal tissue from 50 patients with esophageal or cardial cancer.

应用免疫组织化学的方法测定50例食管贲门癌标本及其附近正常食管粘膜中GHR表达情况，分析食管贲门癌组织和正常食管粘膜中GHR表达及其与临床、病理因素的关系。

The content of total and soluble elements in different soil profiles of Carex meyeriana mire wetland changed in different seasons, and moved in deep horizon of soil.

乌拉苔草沼泽湿地化学过程的研究着重分析营养元素在土壤和植物不同器官中的分布与动态。

Mineral composition and microstructure of fly ash-high cementitious materials were studied by such means as chemical analysis, XRD and SEM.

采用化学成分、X衍射和电子显微镜分析等方法研究了高掺量粉煤灰固结材料的矿物组成及微观结构。

The results show that at normal temperature,the demulsify volume is 2 percent of the oily sludge volume, the volume percent of solvent is 80 percent, and the centrifugalization is fifteen minutes with 1500 revolutions per minute.

对胜利油田郝现联合站的罐底泥进行了分析，针对油泥特点，进行了化学破乳溶剂萃取离心分离的脱油处理技术研究。

Key words: oily sludge; chemical demulsification; solvent extraction; centrifugalization

对胜利油田郝现联合站的罐底泥进行了分析，针对油泥特点，进行了化学破乳溶剂萃取离心分离的脱油处理技术研究。

Various chemosynthetic mutes of 3'-deoxyadenosine were reviewed based on raw material.

本文对虫草素的化学合成方法进行了全面总结，并作出合适的评价和分析。

Combined analysis of the essential oil of Chenopodium ambrosioides L.

土荆芥挥发油的化学成分分析。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。