光度

The antifungal activities of these materials were investigated and build foundation to develop low poison plant antifungal products. In experiment, polyphenols were extracted by reflux ectraction method which applyed petroleum ether to degrease and methyl alcohol solvent. Phenolic hydroxyl were examined and inspected by colour-developing reaction and the content of total polyphenols was determined by UV-spectrophotometry. Screening test were performed to the antifungal activities of polyphenol extraction by the tube dilution method to the selected ten pathogenic fungus such as Dothiorella gregaria, Rhizoctonia solani, Phyllosticta pirina, and the minimal inhibitory concentration were measured. The column chromatography and thin layer chromatography were applyed to separate and analyse cortex extracts of Dracaena cochinchinensi Lour.

实验部分采用以石油醚脱脂，甲醇为溶剂的回流提取法来提取植物多酚，用显色反应检识酚羟基；采用紫外分光光度法对多酚粗体物进行总多酚含量的测定；选取了聚生小穴壳菌、立枯丝核菌、梨叶点霉等10株常见农林业致病真菌，采用试管液基稀释法对多酚粗提取物进行了抗真菌活性筛选试验，并测定其最低抑菌浓度；采用柱层析法和薄层层析法对其中抑菌效果较好的龙血竭进行分离分析，根据其中3种化合物的光谱数据UV、IR、~(13C-NMR、1H-NMR和MS鉴定其结构。

objectiveto determine the content of the tritepenoidic acid in dracocephalum moldavica l .methodswith oleanolic acid as the standard,5% vanillin-acetic acid and perchloric as the developer,colorimetric method was applied.

目的测定香青兰全草中总三萜酸成分含量。方法以齐墩果酸为指标，采用香草醛-冰醋酸及高氯酸显色后用分光光度法测其含量。

The decomposition of Elaeagnus angustifolia to nitrite was studied by spectrophotometry.

利用分光光度法研究了内蒙古地区沙生植物－沙枣对亚硝酸盐的分解作用。

In order to detect product\'s quality and to adjust the synthetic conditions, UV and RP- HPLC methods for the determination of the target product were established according to the components of products in the electrosynthesis course, by which target product were able to be simply, fast and accurately determined without separation in advance. And satisfactory results were obtained when they were applied to the determined of the product\'s content.

本研究为检验产品质量，调整合成工艺条件，根据电合成过程中生成物的组成情况，首先建立了无需进行分离就能够简单、快速、准确测定目标产物的紫外分光光度法和反相高效液相色谱法，并将其应用于产品含量的测定，获得令人满意的实验结果。

The Spectrophotometry method was used in experiment, the results is that the content of polyphenol is 14.8 mg/g in Jianshui's Elsholtzia bodineri Vaniot., which was higher than Shiping. The content of total flavones in the tea is 52.8 mg/g in Shiping, 43.9 mg/g in Jianshui.

通过分光光度法检测红河州两个县市野山茶茶水中的多酚类物质及总黄酮的含量，结果表明建水野山茶多酚类物质含量较高，为14.8 mg/g；石屏野山茶总黄酮较高，为52.8 mg/g。

Different samples' absorbent was determined in the condition of different colorimetric time ,different samples' temperature and different freshness,it prove that the result was relative to different experiment conditions in order to master the key point and ensuer the accuracy of the result in experiment.

啤酒双乙酰的含量是啤酒质量评价中的一项非常重要的指标，通过对不同样品在不同的比色时间、不同的样品温度及新鲜程度条件下测定其吸光度，得出不同实验条件对测定结果的影响，以求在实验中掌握好其关键点，确保测定结果的准确性。

The content of Na, K, Ca, Fe, Mg, Zn, Cu and Mn in the skin of Erinaceus europaeus L was determined by atomic absorption spectrometry.

为了解刺猬皮的中药功效与微量元素的关系，用原子吸收分光光度法测定了Na、K、Ca、Fe、Mg、Zn、Cu、Mn等矿质元素。

The absorbency changes of both thiol and vinyl functional group were monitored independently by FTIR spectrometer during vinyl silazane photopolymerizing with ethanedithiol, Based on the results,the kenitics of reaction was studied and the convertion of both thiol and vinyl functional groups were investigated.

采用傅立叶变换红外光谱法跟踪巯基和乙烯基吸光度的变化，跟踪测定了光聚合反应过程中巯基和乙烯基的转化率，研究了乙二硫醇/乙烯基硅氮烷体系的光聚合反应动力学。

Ethanethiol,thiophene and dibenzothiophene as the model sulfur compounds were analysed by FPD in the gasoline.

选择乙硫醇、噻吩和二苯并噻吩作为汽油中的目标检测硫化物，采用火焰光度检测器进行分析。

Meanwhile the lung tissue slide was prepared for electron microscopic observation at 180 minutes after reperfusion.Result: HO-1 expression was upregulated in two groups in the pulmonary endothelial cells,part of pulmonary vascular smooth muscle cells,extima of vessels and epithelial cells of airway,the absorbance was 0.148±0.013,0.158±0.012,respectively.The Shenmai injection group showed higher absorbance than those of the IRI group( P .01),lower W/D and IAR values than those of the IRI group( P .01) significantly and lighter abnormal changes of the lung tissue in morphologically than those of the PIRI group.

结果：HO-1在I-R组、SM组肺血管内皮、部分血管平滑肌、外膜层及部分气道上皮均有阳性表达，原位杂交的平均吸光度分别为0.148±0.013，0.158±0.012，SM组HO-1的表达水平明显高于I-R组( P 。01)，W/D，IAR值显著低于I-R组( P 。01)，肺组织形态学异常改变轻于I-R组。

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。