查询词典 spectrophotometric

Study on spectrophotometric determination of ferrum with phenylfluorone in thepresence of β-CD and OP ;2. A new method for the determination of trace Crwas studied,which was based on surfactant OP enhancement.

在HAc-NaAc缓冲溶液介质中，在乳化剂 OP 存在下，痕量铬对过氧化氢氧化中性红的褪色反应有很强的催化作用，据此建立了测定微量铬的催化动力学光度法。

Nevertheless, its fluorescence is enoughintense to be investigated the switch properties in aqueous solution. 5. The results of fluorimetric titrations and spectrophotometric titrations indicate that,for 〓 and 〓, fluorescence of fluorenyl was quenched by transfer of electron from metalcenter to photoexcited state of fluorenyl during coordination of Cu or Ni.

在酸性条件下，未配位的〓和〓都有荧光，在中性及弱碱性条件下与金属铜、镍离子配位后，发生光诱导电子转移，电子由金属离子中心转移至激发态的芴基而使其荧光猝灭。

Methods: In dilute H2SO4 medium, resorcinol could sensitively inhabit the gallocyanin solution descolorization reaction with KIO4 and H2O2, the optimal condition was investigated, based on which, an inhibition kinetic spectrophotometric method for the determination of resorcinol was established.

在硫酸介质中，间苯二酚能灵敏地阻抑高碘酸钾和过氧化氢氧化棓花青的褪色指示反应，在探讨了反应的优化条件和动力学参数后，建立了测定微量间苯二酚的阻抑动力学光度分析新方法。

The physiological and biochemical resistant mechanism of tea cultivars to tea brown blight caused by Guignardia camelliae. Making use of the mensuration of spectrophotometric analysis to study the enzyme activity of Peroxidas, Polyphenol Oxidas, Catalas, Phenylalamine Ammenia-lyase. The result showed that there was definite difference to the metabolic rule of defence enzymes activity in the annual leaf tissue of the resistant and susceptible cultivars after infecting.

茶树抗云纹叶枯病的生理生化机理研究利用分光光度计对茶树叶片中过氧化物酶、多酚氧化酶、过氧化氢酶，苯丙氨酸解氨酶的活性进行了测定分析，结果表明：感染茶云纹叶枯病菌前后，抗病品种和感病品种当年生成叶中防御酶活性变化规律存在一定的差异。

Hydrogen sulfide was aspirated to a midget impinger containing absortant solution and analysed by spectrophotometric method.

结果显示，龙凤谷、硫磺谷之环境空气硫化氢浓度范围从无法测得到2.42mg/m3，其硫化氢浓度远高於一般生活环境，且有82%的空气样本浓度高於硫化氢之中华民国环境空气品质标准0.1ppm。

In this paper,the authors compared extraction spectrophotometric method with gravimetric method in the determination of naphthenic acid in oil refining sewage,and found that the former method is better than the latter both in precision and operation.

讨论了萃取分光光度法测定炼油污水中环烷酸含量的测定条件和干扰因素并与重量法进行了比较，萃取分光光度法的精确度比重量法高而操作比重量法简单。

Kinetic spectrophotometric method for the determinationof trace nitrilotriacetic acid;2. To improve the yield of an Amide-type Tripodal Ligand and investigate its coordination with rare earth ion under mild condition,a series of Amide-type Tripodal Ligands(L1—L4) have been prepared by the reactions of nitrilotriacetic acid and oxalyl chloride with four kinds of amides,respectively.

为了提高酰胺型三脚架型配体的产率，进一步研究其与稀土离子的配位形式及配合物的荧光性能，以氨三乙酸为母体，草酰氯为氯化试剂，与4种胺在较温和的条件下合成了具有三脚架型结构的配体(L1—L4)，并考察了实验条件、反应温度、反应体系溶剂、缚酸剂、反应时间及催化剂对反应产率的影响。

The liver and kidney were partly removed and fixed with 4 % paraform phosphate buffer. The remnant of the liver was stored in liquid nitrogen and -80℃. 4.examination: Serum: ALT, AST, BUN, Scr in serum were measured by biochemical analyses and MDA,SOD by spectrophotometric methods and HA , LN, C-IV by radioimmunological methods.

指标检测：血清：全自动生化分析仪检测血清中谷丙转氨酶、谷草转氨酶、尿素氮、血肌酐的含量，放射免疫的方法检测血清透明质酸、层粘连蛋白、IV型胶原，分光光度计法检测血清中超氧化物歧化酶活性及丙二醛的变化。

A catalytic kinetic spectrophotometric method has been established for the determination of trace Mn, based on the catalytic action of Mnon the oxidation - reduction reaction between KIO4 and KI in the presence of 1, 10 -phenanthroline and in HAc-NaAc buffer solution.

本文研究了HAc－NaAc缓冲溶液中，在1，10—菲啰啉激活作用下，锰对KIO4－KI氧化还原反应的催化动力学条件，建立了催化动力学光度法测定痕量锰的方法。

The nutritional components of the whole dry pitaya flower were analyzed by ICP-MS,spectrophotometric method,chemical analysis method and gravimetric method.

采用ICP-MS、分光光度法、化学分析法和重量法对火龙果全花的营养成分进行了分析，结果表明，每100 g火龙果花干制品中水分、蛋白质、粗纤维、粗脂肪、总糖、灰分的含量分别为：7.12、11.80、10.01、1.15、23.61、7.43 g；火龙果花中钾的含量相当高，为13 772.07 mg/kg；镁、钙和磷元素的含量丰富，分别达到：1 788.34、1 745.44、307.90 mg/kg；铁、锰、锌等必需微量元素也较丰富。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。