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Using cetyl trimethyl ammoniunm bromide as templating agent, the mesoporous TiO_2 with special performance was synthesized by a tartaric acid sol-gel method. The UV irradiation was used in this process.

以十六烷基三甲基溴化胺为模板剂，采用溶胶-凝胶法，在溶胶-凝胶制备过程中引入紫外光照辐射，制备出具有一定特殊性能的中孔TiO2材料。

The UV and blue light regulation of transcription of the chalcone synthase gene in Arabidopsis is in

专一的UV-B光受体尚未被鉴定出，存在许多可能的UV-B信号传递途径。

It has been identified whether chlorhydric acid or baicalin not. Chlorhydric acid and baicalin of preparation exist or not in by Tlc-scanning Method. This detective index could be used to control the quality of Shuanghuanglian Oral Liquid preparation. To determine the content of chlorphenamine maleate and baicalin by HPLC and UV-2000 and regulate the minimum limit as the control of preparation quality, in order to insure clinical management rationality, safety and usefulness.

通过薄层色谱鉴别口服液制剂中金银花、黄芩等药味的存在，并且金银花、黄芩分别以绿原酸、黄芩苷为考察指标，并采用HPLC、UV-2000测定金银花、黄芩进行含量测定，规定其下限作为制剂的质量控制指标，以保证临床用药的合理性、安全性和有效性。

A wild strain Rhodococcus rhodochrous was mutated by using UV light and Lithium chlorinate,and a mutant named tg1-A6 with high nitirlase activity was obtained.

采用紫外线和氯化锂诱变得到一株名为Rhodococcus rhodochroustg1-A6的菌种，该菌经过培养基和培养条件的优化能够产生高酶活的腈水解酶。

UV-Vis spectrum showed that some monomer or oligomer were existed in this film. The results demonstrated that the PPy chains were served as both the reductant of chloroauric acid and the ligands to stabilize gold-NPs.

接着利用吡咯单体及寡聚体具有的还原性，将新合成的聚吡咯膜浸泡在氯金酸水溶液中搅拌反应，通过扫描电镜观察发现，在膜中还原生成了大量的金纳米粒子，同时在膜的表面也观察到了金纳米粒子的存在。

Objective: To investigate the effects of two different chromogenic agents on determination of the content of total saponins in Anemarrhena by UV spectrophotometry.

目的：考察不同显色方法对紫外－可见分光光度法测定知母总皂苷含量的影响。

The free radical scavenging properties of six Aloe species are to be investigated in some modified chemical system. The antioxidant was purified by silica column and thin layer chromatography and analyzed by HPLC. A fraction was purified from A. brevifolia Mill showed the most effective scavenging activities on 〓 and ·OH (66. 01% and 38. 98% respectively). With the analysis of IR spectrum, UV spectrum and mass spectrum, the structure of FA was identifed as 8-C-D-glucopyranosyl-2- [2-hydroxy] propyl-5-methyl-7-hydroxychromone. Its scavenging activity on free radicals is higher than that of aloe-emodin. Its antioxidant activity may be due to the phenoxyl on glucosyl chromone which can be react with free radicals and form relatively stable free radicals.

本研究利用分别产生超氧阴离子自由基和羟自由基的化学模型体系研究比较了不同品种芦荟提取物的清除活性氧自由基的抗氧化作用，进一步利用硅胶柱结合薄层层析法和反相高压液相色谱法，从短叶芦荟叶子中首次分离了具有较强自由基清除能力（超氧阴离子自由基和羟自由基清除率分别为66.01％和38.98％）的成分FA，利用红外光谱、紫外光谱和质谱等仪器分析结果推断出该活性成分的分子结构为8-C-吡喃葡萄糖-2-[2-羟基]-丙基-5-甲基-7-羟基对氧萘酮，它的自由基清除能力高于芦荟大黄素，是一种天然抗氧化剂。

Their structures were identified by physicochemical constant and spectral analysis (IR, UV, EI-MS, 1H-NMR, 13C-NMR, and HMBC). Results The compounds were identified from their ethanol extracts as: 6, 8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone and 6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)] chromone.

结果 从沉香乙醇提取物中分得2个色酮类成分，分别鉴定为6，8-二羟基－2-［2-（3'-甲氧基－4'-羟基苯乙基）］色原酮{6，8-dihydroxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]chromone，Ⅰ}和6-甲氧基－2-［2-（3'-甲氧基－4'-羟基苯乙基）］色原酮{6-methoxy-2-[2-(3'-methoxy-4'-hydroxyl phenylethyl)]-chromone，Ⅱ}。

Determination of Cinnamaldehyde and Cinnamic Acid in Cinnamon by Non-aqueous Capillary Electrophoresis with UV Detection

建立了用非水相体系高效毛细管电泳/紫外检测法同时测定肉桂酸和肉桂醛的新方法，考察了运行电压、非水相介质和电解质等因素的影响。

The compound HCB-01712-2 has been isolated from the broth of Claviceps HCB-01712,by the analyses of its physico-chemical properties,UV,ESI-MS and NMR spectra data,the structure of HCB-01712-2 has been identified as methyl vanillate.

从麦角菌(Claviceps sp。)HCB-01712的发酵液中分离纯化得到化合物HCB-01712-2，经理化分析、紫外吸收、质谱及核磁共振谱分析，确定该化合物为香草酸甲酯。

You have to admit: we are all committing this crime.

你必须承认：我们都犯这种罪行。

How to Position Sheet-fed Photogravure Press in Demestic Market?

单张纸凹印机在我国市场中究竟应该如何定位？