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There are some problems in traditional separation process for toluene diamine, such as low purity of product and huge energy expenditure. 传统的甲苯二胺分离工艺存在一些缺点,如甲苯二胺产品的纯度不高、过程的能耗大等。
The strains used in the production of nuclease P1 have many demerits, such as low production capacity, low enzyme activity and low purity. 现阶段用于工业生产的核酸酶P1产量不高，酶活力及纯度较低。
The low purity of furnace charge and accessories and the improper smelting and pouring crafts were regarded as the formation reason of the oxide film. 同时,分析认为这种氧化膜的形成与金属炉料、铸造辅料的洁净度不够以及熔炼、浇注不合理有关。
By using high salt and low pH DNA method,the DNA extracted with high purity and low production,which of modified CTAB with the contrary results,high production and low purity. 用两种提取方法从叶片中得到的DNA产量和质量有所不同,高盐低pH法提取的DNA纯度高,但是产量较低; 而改良CTAB法则相反,产量高,纯度低。
To meet the demand for high purity TEA in domestic market, 99% high purity triethanolamine (TEA) was prepared by a route using low purity TEA as raw material. 为满足国内市场对高纯度三乙醇胺的需求,采用以低纯度三乙醇胺为原料的生产路线,获得含量99%25的高纯度三乙醇胺。
A study was done on the problems such as the relatively low yield, low purity and dark color of the corn-gluten foaming powder produced by means of hydrolyzing corn gluten with alkali. 在用碱水解玉米麸质粉生产玉米蛋白发泡粉的基础上,就玉米蛋白发泡粉得率低,纯度低,色泽深等问题进行了研究。
The influence of using lower purity PX on oxidization production load and each systems of the PTA plant is introduced. The plant stable running is realized with process aptimization . 阐述了低纯度对二甲苯(PX)在本装置使用后,对氧化反应、生产负荷及装置各系统的影响。通过工艺优化,实现稳定运转。
Purity of the collected acetaldehyde oxime is more than 98% and yield is more than 90%.This method solved the problem of the lower purity and the lower yield of acetaldehyde oxime. 所得乙醛肟纯度达到98%25以上，收率达到90%25，解决了乙醛肟提取过程中含量低、收率低的问题。
CRYSTALLINE SILICON THIN FILM SOLAR CELL ON LOW PURITY SSP SUBSTRATE 低纯度颗粒硅带上硅薄膜太阳电池
The government is trying to keep a low profile on this issue. 政府力图在这个问题上保持低姿态。
The singer forced his low notes. 那位歌手勉强唱出低音。
He because of bashful but low head. 他因羞愧而低下了头。
The ship lay keeled over at low tide. 那艘船因退潮而倾覆。
My home town lies low in a hidden valley. 我的家乡位于一个隐蔽的山谷里。
Low grades are getting Hellen down. 低分数使海伦闷闷不乐。
After a brief rally share fall back to a new low. 股票经过一次短暂回升后回落到一个新的低点。
Talking in a low voice were a man and a woman. 低声讲话的是一男一女。
Judy bent her face low over the notebook. 朱迪把脸凑近笔记本。
The food should be kept at low temperature. 这种食品应低温保存。
The publisher paid his hacks low. 出版商付给他雇佣的文人很低的费用。