1) Purity gradient
纯度梯度
2) gradient of scalar field
纯量场的梯度
3) purity
[英]['pjʊərəti] [美]['pjurətɪ]
纯度
1.
Preparative Separation of High-purity Cellooligosaccharides by Polyacrylamide Gel Column;
聚丙烯酰胺凝胶柱分离制备高纯度纤维低聚糖的研究
2.
New techniques of refining high purity methyl acetate;
高纯度醋酸甲酯精制新工艺
3.
Determination of Purity of Chlorotoluron by Differential Scanning Calorimetry;
差示扫描量热法测定除草剂绿麦隆的纯度
4) purification
[英][,pjurifi'keiʃən] [美][,pjʊrəfə'keʃən]
纯度
1.
Separation and purification conditions of fructose monopalmitate that synthesized by immobilized lipase enzyme Novozym435 using mixed solvent were investigated.
结果表明,混合溶剂环己烷乙醇水萃取棕榈酸果糖单酯的纯度可达93。
2.
The separation and purification were carried out by using gel chromatography and high performance liquid chromatography .
通过高效液相色谱法对其纯度进行了分析,表明其为均一组分,进而应用凝胶法和高效液相色谱 电喷雾质谱法测得该茶多糖蛋白的相对分子质量为51500。
3.
In the case of measuring the contents of volatile phenols in water by using 4 - AAP spectrophotometry, the purification of 4 - AAP has great influence on the test results.
用4-氨基安替比林(4-AAP)分光光度法测定水中挥发酚类含量时,4-AAP药品纯度对试验结果的影响很大。
5) pureness
[英]['pjuənis] [美]['pjʊrnɪs]
纯度
1.
By means of making a study of the relationship of particle size and pureness to the crystallization condition of stibium trioxide in production process over the ten particle size fractions of stibium trioxide products,the causes that given rise to the dependence of stibium trioxide pureness on the particle size were compared and analyzed.
通过对粗粒锑白等十种不同粒度级锑白产品在生产过程中的结晶条件与粒度、纯度的关系进行探讨后,对比分析了粒度与纯度关系的成因。
2.
The low pureness of parents and the inferior quality of seeds are two prime reasons which makes the low-grade quality of seeds produced by intercrossed maize.
亲本纯度低、制种质量差是造成玉米杂交种子质量低劣的两大根本原因。
6) Gradient
[英]['ɡreɪdiənt] [美]['gredɪənt]
梯度
1.
Preparing Fe-base gradient composite material by slip casting;
粉浆浇注制备铁基梯度复合材料
2.
Theoretical study on cuboid magnetic field and its gradient expression without analytic singular point;
长方体磁场及其梯度无解析奇点表达式理论研究
3.
The electrochemical corrosion behavior of function gradient Ni-P alloy deposit in acidic and alkaline media;
功能梯度Ni-P合金镀层在酸性和碱性介质中的电化学腐蚀行为
补充资料：纯度测定
一般指采用适当的分析方法求出高纯度物质（如高纯金属、高纯材料、高纯气体等）的纯度而言。测纯度的方法可分为两种：①直接测定法，例如用电解法测定纯金属的纯度，用重量法测定纯物质的纯度等。由于纯度的百分率数值较大，对有效的位数要求也多,因此,测定方法必须是高精度和高准确度的，这样就使高纯物质的纯度测定受到了限制。②间接测定法，它是用高准确度、高灵敏度的方法测定高纯物质中的各种杂质含量，然后从待测物质中减去所测杂质总量的百分率作为该高纯物质的纯度。对高纯物质的纯度测定，目前多采用此方法。测定高纯物质中杂质的方法甚多,较常用的有:紫外-可见分光光度法、原子吸收光谱法、原子发射光谱法、电化学分析法等。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条