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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Thermal decomposition of secondary stock from the flax-processing industry and the possibility of optimizing production of carbon fibre materials with sodium phosphates were investigated.
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This work deals with the effectiveness of sodium phosphates and nitrites used as inhibitors against steel corrosion in concrete reinforcement.
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It was found that current efficiencies for the production of sodium phosphates exceeded 96%, this being higher than that for sodium hydroxide and, in spite of the different properties of the membranes, these efficiencies were similar.
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Comparative studies have been carried out on the electrosynthesis of sodium phosphates in the cathode compartment of an industrial membrane cell supplied with phosphoric acid of concentrations ranging from 1 to 2 mol dm-3.
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A significantly higher yield of the diol occurred in media buffered with potassium rather than sodium phosphates.
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| | The partition characteristics of B.sublilis′ α-amylase and proteinase in PEG 6000/(NH_4)_2SO_4 and PEG6000/sodium phosphates(pH7.5)aqueous two-phase systems were observed.The factors that influence the distribution coefficients and stability of the enzymes were investigated.Procedures of liquid liquid extraction were developed for the partially purification of the crude preparations of B.sublilis′α-amylase and Proteinase.After partially purifying the specific activity(units/mg preparation)of α-a... | | 观察了枯草杆菌α-淀粉酶、蛋白酶在聚乙二醇/硫酸铵和聚乙二醇/磷酸盐两个双水相系统中的分配行为。设计了借液-液萃取方式分别部分纯化上述两酶粗品的方案。经部分纯化后α-淀粉酶的比活力(按每毫克制品含活力单位数计算)提高至6倍,活力回收率可达80%;蛋白酶比活力提高至8倍,活力回收率在50~60%间。此法具有简易、快速、有效、并可准确放大缩小操作规模等特点。 | | 文摘来源 | | Based on the insolubility and other properities of melamine phosphate,a new process for pacifying impure wet-process phosphoric acid and producing sodium phosphates is presented,by means of melamine as medium and wet-process phosphoric acid as raw material which is not or papally purified.The experimental results indicate that phosphoric acid about 20%(P2O5)can be used as raw material,the preducts can be used as feed addihve. | | 本文研究了以三聚氰胺为反应媒,净化湿法磷酸并生产纯净磷酸钠盐的工艺技术,确定了反应过程适宜的工艺条件。研究结果表明:采用此工艺可由P2O5浓度在20%以下的湿法磷酸制取达到饲料级标准的磷酸钠盐,不失为一种适合我国国情的新工艺技术。 | | 文摘来源 | | Solids and solutions of sodium phosphates with various chain lengths have been studied by using the techniques of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and attenuated total reflection- Fourier transform infrared ( ATR- FTIR ) spectroscopy, respectively. A systematic study of the infrared spectra of the solid sodium phosphates has been conducted on the basis of the information available in the literatures to establish the assignments of the infrared vibra... | | Solids and solutions of sodium phosphates with various chain lengths have been studied by using the techniques of diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy and attenuated total reflection- Fourier transform infrared ( ATR- FTIR ) spectroscopy, respectively. A systematic study of the infrared spectra of the solid sodium phosphates has been conducted on the basis of the information available in the literatures to establish the assignments of the infrared vibra... | | 文摘来源 | |   | | << 更多相关文摘 |
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