光度

To determinate the concentration of TiO_2 in functional fiber for labeling purpose,the sample was nitrified with burning and dissolved in mix acid as pretreatment and then its concentration of TiO_2 was determined by spectrophotometric method with ascorbic acid as shelter reagent of Fe~(3+) and Cu~(2+) and diantipyryl methane as developer at wavelength λ=390 nm.

针对功能纤维中添加TiO2的含量测定问题，对功能纤维样品采用高温消化、混酸溶解的前处理方式，以抗坏血酸作Fe3+、Cu2+的掩蔽剂，二安替比林甲烷作为显色剂，用分光光度法在λ=390 nm波长处测定功能纤维中纳米TiO2的含量。

The present electrochemical method simplified the experimental procedure and overleaped the complicated sample pretreatment.

并且其检测结果与分光光度法的结果较好地一致，该方法简单、安全并且样品不需要复杂的预处理，有较好的回收率，稳定性和抗干扰能力。

Methods Lung targeting gelatin microspheres of enrofloxacinwere prepared by emulsion-corsslinking method, the micorpheres were obsevred by oil lens of microscope, the diameter of the microspheres was measured and the microspheres was photoed by micro-camera. The conetnt of ENR is measured by mehtod of ultraviolet spectrophotometer.

采用乳化-化学交联法制备恩诺沙星肺靶向明胶微球，油镜下观察微球粒径大小及形态并用微型照相机（Olympus DP12-2）拍照做记录，通过紫外分光光度法检测微球中恩诺沙星的含量，进而计算得出其载药量和包封率，并通过溶出度测定法探讨其体外释放规律。

Therefore, it is necessary to refine and upgrade the experiential rules to a level that can be express with quantized mathematic language.

因此需要将分光光度分析方法的经验规律提炼和上升到能用量化的数学语言表达的水平。

While redissolved in water at 20℃, the specific rotation of glucosamine sulfate decreased with the time from 92.1° to about 56.7° and was, however, stable after 1.5 h at 56.7°.

将氨基葡萄糖硫酸盐产物的晶体重新溶解于20℃水中时，它的比旋光度随时间的延长而下降，1.5h后趋于稳定，从92.1°降低至56.7°。

Methods The sulfured hemoglobin of the biomaterials were investigated by the spectropho-tometery.

用分光光度法测定生物检材中的硫化血红蛋白。

Results Results showed that sulfured hemoglobin had a specific absorbance peak at 612nm,it is a linear relationship about the absorbancity to the concentration of sulfured hemoglobin.

结果 硫化血红蛋白在波长612nm处有特徵吸收，且其在此处的吸光度与硫化血红蛋白的浓度成正比。

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇，俗称原维生素B_5，属维生素B旋类营养增补剂，广泛应用于医药、化妆品、食品、饲料等领域，本文着重探讨了其制备及关键因素的优化，主要内容可分三部分：第一是D-泛内酯的制备，先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯，再经催化氢化得到DL-泛内酯，然后通过物理拆分获得D-泛内酯，得到产物的比旋光度与进口产品基本一致。

Methods The drying soybean products were triturated. The powder samples were defated by the diethyl ether for 5 hours, and returned by the 80% methyl alcohol solutions with the liquid-solid ratio of 25:1 for 5 hours. The content of the total isoflavone in filtrate was determined by ultraviolet spectrophotometry.

将烘干的豆制品研成粉末，取粉末样品置于索氏抽提器中，用乙醚脱脂5h后，用80%的甲醇溶液以25：1的液固比热回流5h，用紫外分光光度法测定滤液总异黄酮含量。

Result: As compared with controls, the absorption values in reaction system decreased significantly in nobiletin treatment groups.

结果：川陈皮素处理后反应体系的吸光度与对照组相比显著降低。

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