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A method for determinating the activities of pectinase was proposed in this paper. It can produce the red-brown amino compounds when 3,5-dinitrosalicylic acid and aldehyde were heated together. The amino compounds had maximum absorbency at 540nm. In certain range, there was a good linear relationship between the amount of reducing sugar and the color of the reaction mixture.

针对QB1502-92标准测定方法测定高活力果胶酶、固定化果胶酶活力存在的实验误差大,重现性及灵敏度差的缺陷,提出了利用3,5-二硝基水杨酸与醛糖共热产生棕红色的氨基化合物,在一定范围内还原糖的量和含有呈色氨基化合物的反应液颜色深浅成正比的原理,在540nm下测其吸光度,从而计算出果胶酶活力的测定方法,并对测定步骤、影响因素及测定中可能出现的问题进行了试验研究。

According to the method D1102-84,which is the normative method of biomass ash measurement,approximate analysis has been done with the straws of wheat,rice,corn,bean,durra and cotton as sample.

按照D1102-84灰分标准测定方法,对小麦、水稻、玉米、黄豆、高粱、棉花等几种秸秆样本进行了工业分析;在ZRC2000智能灰熔点测定仪上对不同秸秆进行了灰熔点测试;在不同的温度和停留时间下,在马弗炉上对不同秸秆进行了热灼烧试验。

Apart from the determination by the German DIN standards regulating valve rated flow coefficients and adjust the characteristics of outside, HORA also in accordance with the requirements of the user measured more indicators related to the valve.

除了按德国DIN标准测定调节阀的额定流量系数及调节特性以外,HORA还能按用户的要求测取有关阀门的更多指标。

This method can be used to determine the content of polysaccharides in Laminaria japonica.

结论按照多糖中单糖组成比例为标准测定多糖含量具有可比性,可用于海带多糖含量测定。

To improve the standard method for determining phosphoric acid in the air of workplace, so as to make it to be applied in practical work.

目的 对目前工作场所空气中磷酸的标准测定方法进行改进,使之可以在实际工作中应用。

A modified analysis method based on the determination of ozone—indigo disulphonate spectrophotometer(GB/T 15437-1995) in gas phase has been developed to detect the concentration of ozone in liquid phase. An analytical condition of λmax=612~615 nm,ε=20 000 L/, pH 2 is obtained by the titration of indigo disulphonate. Compared with potassium iodide method,it shows a higher precision and accuracy,CV<3.0%. The results also prove that blank experiment will bring about 5.0%systematic error.

在气相臭氧浓度的靛蓝二磺酸钠分光光度法(GB/T15437-1995)基础上提出了液相臭氧浓度的测定方法,采用靛蓝二磺酸钠标准曲线法代替采用易分解的臭氧标准曲线法,得出测定条件λmax=612~615 nm、ε=20 000 L/、pH为2,通过碘量法比较实验,说明新的测定方法具有较高的精度和准确度,相对标准偏差小于3.0%;比较结果表明忽略空白实验将引入5.0%的系统误差。

In this dissertation , the fading status of several mid-temperature vinyl sulphone reactive dyes with different color and relatively low cost in light and perspiration has been tested according to the ATTS standard. A team of three prime color reactive dyes with high light-perspiration fastness (Levafix Fast Red CA、Reactive Yellow 3RS、Reactive Navy RGB) has been selected and the influence of different dyeing process parameter on their match performance were studied and finally the proper normal dyeing process was confirmed.

其次,本文从实际应用角度出发按照ATTS汗液标准测定了一些不同色相的成本相对较低的中温型含乙烯砜活性基的活性染料在光照及汗液组分作用下的褪色情况,从中筛选出了具有较高耐光汗复合色牢度的活性染料三原色Levafix Fast Red CA、活性黄3RS、活性藏青RGB,并研究了不同工艺参数对其配伍因子的影响,确定了常规最佳工艺。

This paper compares the circular locus method,modified Martindale method,pilling box method and random rolling method in the GB/T 4802-2008 Textiles - Determination of fabric propensity for fuzzing and pilling. Based on the comparison of two standards which containing multi-conditions,analyses the rationality of the factors、the scientificity of the test method in the Product Standards and the influence of the Standards change. In the end, brings up some suggestions.

本文对国标《织物起毛起球性能的测定》中的圆轨迹法、马丁代尔法、起球箱法及随机翻滚法四种测定织物起毛起球性能的试验方法进行试验比较;并对其中包含多种测试条件的两个标准各种测试条件进行比较,从而分析产品标准中指标的合理性、试验方法的科学性及新旧标准的更替对产品标准的产生影响,并对方法标准和产品标准提出一些个人的建议。

This paper determined Li+ content of LiFePO4/C composite by air-acetylene flame atomic Absorption spectrum method,recovery rate of standard series sample with Fe2+ and PO3-4 and without Fe2+ and PO3-4 were determinated.

采用空气-乙炔火焰原子吸收法测定了LiFePO4/C复合物中的锂含量,考察了不加基体和加入基体的两种标准系列的回收率;因为目前还没有LiFePO4的标准样品和标准分析方法,所以实验采用模拟标准样品考察了不同酸介质和不同酸用量的影响,并进行了Fe2+、PO34-、Cr3+、Mg2+、Mn2+、Co2+、Ni2+离子对测定锂的干扰实验。

The curve of work in rapid determination of COD of printing and dyeing is settled through lots of expemiments, referencing normal curve and data involved. It is applied to following experiments in determination of COD of wastewater.

3参照COD的标准测定法及相关资料,通过多次试验,并参照标准曲线,建立了印染废水中COD快速测定的工作曲线。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

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我比喻得过头了。