测定

The effect of thermal and anaerobic ageing on the structure and properties of NR vulcanizates was studied.The crosslinking density and distribution of NR vulcanizates during ageing were determined with the method of devulcanization by using the chemical probes,and the physical and dynamic properties were also determined.

研究了热空气老化和真空老化对NR硫化胶结构和性能的影响，采用化学探测剂脱硫的方法测定了老化过程中NR硫化胶交联密度及交联键分布变化的情况，同时测定了硫化胶的力学性能和动态性能随时间变化的情况。

Methods The ROS production in the cells was detected by using 2,7-dichlorofluorescin diacetate as probe and the protein expression of the AP-1 and ERK2 determined by Western blot.

用分子探针2，7-DCF测定细胞内ROS的产生量以及用Western blot测定ERK2激酶和转录因子AP-1的蛋白表达。

The diaminobenzidine method was used to decide the concentration of diacetyl in fermented milk cultured in 25 or 30 ℃ for 4, 8, 12, 24, 36 and 48 hours respectively. GC-MS method was used to assess the identification and contents of volatile flavor compounds.

采用邻苯二胺法，分别测定25，30℃培养4，8，12，24，36和48 h发酵乳中双乙酰的含量，用GC-MS方法测定了发酵乳中挥发性风味物质的组成。

Finally, the formaldehyde content of the raw material, semi-product and final beer was determined by the method of diacetyl distillation instrutment in this paper.

本文比较了甲醛测定的几种方法，例如乙酰丙酮法、AHMT法以及液相色谱法，最终采用AHMT法对啤酒生产的原料、半成品及成品啤酒中的甲醛含量进行了测定。

A spectrophotometry method, which based on the reaction of diacetyl monoxime and urea in acidic solution, was established for determination urea in bovine milk.

根据二乙酰一肟与在酸性条件下尿素的反应，建立了一种分光光度法快速测定牛奶中尿素含量的方法，该方法可以定性和定量测定牛奶中尿素含量。

A method is described for the separate determination of diacetyl and 2,3-pentanedione in beer by GC-ECD, The conditions of sample preparation and GC determination have been-discussed.

本文介绍了采用GC-ECD分别测定啤酒中双乙酰和2，3-戊二酮的方法，文中讨论了样品制备及GC的测定条件。

According to the yogurt's complex ingredients and the particular content of diacetyl , this article studied the determination of diacetyl in yogurt with ultraviolet spectrophotometer.

本文根据乳品中的成分的复杂性及双乙酰含量的特殊性，研究了以鲜奶为溶剂制作双乙酰标准曲线和紫外分光光度法测定乳品中双乙酰含量的测定方法。

This method is simple, rapid, accurate and effective for testing the impurity dibenzyl-(2-chlorophenyl) methanol in Clotrimazole and Betamethasone Dipropionate cream and for its content determination.

所建方法准确、简便、快速，适用于克霉唑倍他米松乳膏中克霉唑和二丙酸倍他米松的含量测定和杂质二苯基-（2-氯苯基）甲醇的含量测定。

Dictamnus dasycarps Turcz. also have insecticidal activity to Ostrinia furnacalis, When the concentration was 10g/ml, correct decreased rate reached 92.86%, When the concentration was 0.675ml/g, the correct decreased rate reached 3.57%; Dictamnus dasycarps Turcz. at the range of testing concentration have lower stomach toxic effects to Ostrinia furnacalis.

通过白鲜皮对玉米螟杀虫活性的初步研究表明：白鲜皮对玉米螟表现出很强的拒食活性，在测定浓度范围内其拒食活性均在80％以上，最高可达97.22％。；白鲜皮提取液对玉米螟也有一定的毒杀活性，当浓度为10g／ml时其校正死亡率可达到92.86％，浓度为0.675ml／g时校正死亡率仅为3.57％；白鲜皮在测定浓度范围内对玉米螟的胃毒活性较低，最高才42.86％。

Serum IgG titers against P.gingivalis antigens were measured by enzyme-linked immunosorbent assay. IgG avidity was measured by diethylamine dissociation ELISA.

血清IgG抗体滴度采用酶联免疫吸附试验测定；其亲和力通过二乙醇胺分离，ELISA测定。

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。