查询词典 solvent

Solvent/paint waste was sent to fractionization by equipment, fractionization by the solvent recovery equipment, waste solvent flushing or available to do cleaning solvents.

溶剂/涂料废弃物被送到分馏设备处，分馏设备把溶剂回收，回收的溶剂可用做冲洗或清洗溶剂。

Secondly, we established the method of HPLC to determine the content of liensinine in order to control the quality of phenol total base of plumula nelumbinis. With the method we compared three different solvent extraction, and the result showed alcohol-acid water-organic solvent was the best solvent extraction.

使用HPLC法对莲子心酚性总碱中的莲心碱进行质量控制，对三种莲子心酚性总碱的提取方法进行了对比，通过三种溶剂法对莲子心总碱进行提取的实验，结果表明，醇一酸水一有机溶剂提取法提取效率最高，总碱提取率达11.25%，莲心碱提取率为1.20%，此方法操作简便，溶媒易得。

The result indicates that the best method for extracting β-carotene is to saponify the test specimen one hour with 4% NaOH methyl alcohol solution in 60-70'c and then to separate with 3:7 acetone-benzine component solvent as extraction solvent, MgO as the absorbent, the acetone-benzine as the eluent. Extracted solvent has been determined in the color dish condition (1cm) by ultraviolet spectrophotometer at 447 nm. The result shows that the β-carotene in carrotis 0.134 mgg^(-1), 0.0863mgg^(-1) in red pepper and 0.0426 mgg^(-1) in spinach.

结果表明，比较优先的β-胡萝卜素提取方法是：试样用4% NaOH甲醇溶液在60℃~70℃皂化1h，用3：7的丙酮－石油醚混合溶剂提取，以Mgo为吸附剂，丙酮－石油醚为洗脱剂分离，提取液用紫外分光光度计在波长447nm，1cm比色皿条件下测定，得出蔬菜中β-胡萝卜素含量：胡萝卜为0.134mgg^(-1)，红椒为0.0863mgg^(-1)，菠菜为0.426mgg^(-1)。

The effects of many parameters, such as the amount of surfactant, airflow rates, pH, NaCl, ethanol and temperature on the solvent sublation were studied. Experimental results showed that a ratio of surfactant to Pb-dithizone complex (2∶1) was the most effective for the removal, with over 97.4% Pb removed from the aqueous solution in 40 min by solvent sublation, at the value of pH 12.6.The solvent sublation process followed first order kinetics. A characteristic parameter, apparent activation energy of attachment of the sublate to bubbles, was estimated at a value of 2.08 kJ/mol.

结果表明，当表面活性剂与硝酸铅物质的量之比为2∶1时，铅去除率达97.4％；体系去除率在pH值为12.6时最高；有机溶剂的影响不明显；少量的乙醇可提高其去除率和去除速率，但过多会产生抑制作用；适量的NaCl能提高体系去除率，但随着浓度的提高呈现下降趋势；去除速率随气流速率增加而增加，体系去除率随温度升高而递增；反应过程遵从一级动力学，表观活化能为2.08 kJ/mol。

The production practice for three years showed that the phosphorus content and residual solvent in the degummed oil reached the standard, the steam and solvent consumption in the production line of pretreatment and solvent extraction plant were 265 kg/t and less than 0.8 kg/t, respectively.

整个蒸发系统采用全负压工艺技术，充分考虑余热利用，降低蒸汽消耗。从使用3年的情况来看，脱胶油含磷量和残溶达标，预处理车间和浸出车间整条生产线蒸汽消耗为265 kg/t，溶剂消耗小于等于0.8 kg/t。

The key innovation of the preparation method of the PDMS composite membranes lies in: The supporting layer is dipped into a kind of polar solvent so that the micropores are soaked and saturated by the solvent; with that the supporting layer is set on a flat surface, then the dilute PDMS solution is spayed spontaneously on the substrate; finally the solvent volatilizes and the PDMS skin layer is formed.

探索了填充碳分子筛的硅橡胶膜的制备及其用于乙酸-水体系分离的过程；采用新方法制备了高通量和选择性稳定的新型硅橡胶复合膜，并对这种膜在多种有机物-水体系的渗透汽化分离机理和实际应用两方面进行了广泛实验，取得具有较令人满意的研究结果。

Results show that the morphology of HNS changes from short plane-like shape to long plane-like shape when non-solvent temperature changes from 25℃ to 50℃. The morphology comes through the variety of ellipsoid, short plane-like and club-shaped with pH value of non-solvent from acidity to neutral and finally basical, with the particle size distribution in 50-300 nm, 50-500 nm, and 50-600 nm, respectively. Ellipse plane-like and long club-shaped morphology HNS were obtained using white dextrine and sodium carboxymethyl cellulose as surfactants in non-solvent, with the particle size distribution in 50-300 nm and 50-600 nm.

结果表明：非溶剂温度由25℃升高到55℃后，HNS晶体形貌由短片状变为细长片状；pH值由酸性变化到中性再到碱性时，亚微米HNS的晶体形貌经历椭球状、短片状、棒状的系列变化，粒度分布分别处于50~300 nm、50~500 nm、50~600 nm；白糊精和羧甲基纤维素钠作为晶形控制剂修饰后的亚微米HNS晶体形貌分别椭圆片状和长棒状，粒度分布分别处于50~300 nm、50~600 nm。

The results suggested that chitinhad a good solubility in the new solvent when its at -30℃and below, but the solubilityof chitin no longer increasesd notable as the temperature reduced; The joined of urea, incertain degree, strengthened the solvency of alkali solvent to chitin. When theconcentration of sodium hydroxide is 8%～12%, Chitin had a good solubility, and theapparent viscosity of chitin solution could up to 4000 mpa·s～5000mpa·s at roomtemperature; In addition,the solubility of chitin in new solvent was high when therefrigerated time was three days and above, but the refrigerated time could not too long,otherwise, the deacetylize degree of chitin got more bigger. The properties of chitin solution were tested by revolving viscosimeter, FT-IR,X-RD and so on.

结果表明，在-30℃及以下甲壳素能很好的溶解于新溶剂中，但甲壳素的溶解度不再随温度的下降而有所增大，而是基本保持不变；尿素的加入，在一定程度上强化了强碱溶剂对甲壳素的溶解，当新溶剂中NaOH浓度为8％～12％时，甲壳素在试验温度下可以获得较好的溶解度，所得溶液在室温下的表观黏度达4000 mpa·s～5000mp·s；冷冻时间为3 d及以上时，有利于甲壳素的溶解，超过3 d，甲壳素的溶解度变化不大，另外，冷冻条件下，甲壳素在强碱溶剂中仍会发生脱乙酰化反应，冷冻时间不宜太长。

If the progress of the solvent front is monitored closely, itis also acceptable to draw start and stop lines on the plate before the chromatogram is run (A pencil should be used because ink is soluble). This prevents inaccuracies that occur when the solvent evaporates before the final solvent front can be marked. Sketch the chromatograms in your lab notebook.

如果要密切监测溶剂前沿前进过程，可在进行层析前可以先把起始线和终止线先标上，这方法是可以接受的(应该用铅笔，因为墨水是可溶解的)这样的话可以避免由于溶剂前沿在被作标记前已挥发掉所引起的不准确度。

If the progress of the solvent front is monitored closely, itis also acceptable to draw start and stop lines on the plate before the chromatogram is run (A pencil should be used because ink is soluble). This prevents inaccuracies that occur when the solvent evaporates before the final solvent front can be marked. Sketch the chromatograms in your lab notebook.

如果要密切监测溶剂前沿前进过程，可在进行层析前可以先把起始线和终止线先标上，这方法是可以接受的(应该用铅笔，因为墨水是可溶解的)这样的话可以避免由於溶剂前沿在被作标记前已挥发掉所引起的不准确度。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。