The factors affecting the preparation of chitosan microspheres,such as viscosity-average molecular weight and concentration of chitosan,ratio of ethyl acetate and NaOH,agglomerating time,were studied and the method of preparing porous chitosan microspheres was optimized using the surface,inner configurations and shape of chitosan microsphere obtained by scanning electron microscope as index.
以不同黏均分子量的壳聚糖为材料,用扫描电子显微镜观察壳聚糖微球表面、内部结构及形态,并以其为主要参考指标,研究了壳聚糖黏均分子量、NaOH浓度、乙酸乙酯比例、壳聚糖浓度、凝结时间等对壳聚糖形成多孔微球的影响,优化了制备多孔壳聚糖微球的工艺参数。
The effects of solid content of latex,reaction temperature,the amount of phenylhydrazine and pepegal O on the viscosity-average relative molecular mass(η) of LNR were investigated,and the optimization of these influence factors was conducted by orthogonal test.
以天然橡胶浓缩胶乳为原料,在热氧条件下采用苯肼为催化剂通过化学降解法制备液体天然橡胶(LNR),考察了胶乳的总固物质量分数、反应温度、稳定剂平平加O和苯肼用量对LNR黏均相对分子质量(M-η)的影响,并通过正交实验进行优化。
The viscosity-average molecular weight of PASP,scale inhibitio.
用极限黏度法测定合成聚天冬氨酸的粘均分子量,用静态阻垢法评价聚天冬氨酸的性能,用摇床法检验聚天冬氨酸的生物降解性。
The effect ofγ-irradiation dose(range from 0 to 25kGy) on the viscosity-average molecular weight((?)),mechanical properties,thermal performance,and the chemical structure of poly (L-lactic acid)(PLLA) under air atmosphere was investigated.
考察了辐射剂量(D)在0～25kGy范围和空气气氛下,γ-辐照对L型聚乳酸(PLLA)的粘均分子量((?)_η)、力学性能、热稳定性和化学结构的影响。
Use viscometry to determine viscosity-average molecular weight of oxidated polyethylene wax and introduce the measurement,process and effect factors in detail.
用粘度法测定氧化聚乙烯蜡的粘均分子量。
The change of viscosity and average molecular weight of heavy oil from Liaohe oilfield with temperature and reaction time are investigated in the paper.
探讨了在注蒸气条件下,稠油的粘度和平均分子量随蒸气温度、反应时间的变化规律,研究了金属盐、油层矿物对稠油水热裂解反应的影响。
The refractive index, density, average molecular weight, elemental composition and 1H-NMR spectra of five coker gatches were determined.
测定了大庆、胜利、辽河、管输等5种焦化蜡油的密度、平均分子量、折光指数、元素和1H－NMR核磁共振波谱等数据，研究了5种焦化蜡油的化学组成，包括饱和烃、轻芳烃、中芳烃、重芳烃和胶质5个组分的含量，并与直馏蜡油的数据进行了对比；采用改进的B－L法、n－d－M法和密度法计算了平均结构参数。
GPC analysis revealed that the average molecular weight and molecular radius of β-glucan were 9.
30%,由此可用高效凝胶色谱测定其分子量,得到其平均分子量为9。
In this paper,the influence of molecular weight(Mw) of modified PASP(Asp-Glu copolymer,PAG) on its scale inhibition is studied,and the optimum molecular weight are determined;moreover,the scale inhibition performance of combinated copolymer with different Mw is also tested.
考察了聚天冬氨酸(PASP)的改性产物——天冬氨酸-谷氨酸(Asp-Glu)共聚物的分子量对阻垢性能的影响,确定了共聚物的最佳重均分子量;并考察了两种不同分子量共聚物复配使用的阻垢效果。
Although GPC online viscometer, as a kind of GPC equipped with a concentration detector and a viscometer, has been used widely as its brief manner, its results of molecular number, molecular weight and dispersibility retain a lot of errors with the problems of the data applied method and the precision of instrument.
黏度在线凝胶色谱是一种同时配备浓度和黏度检测器的凝胶色谱,由于其测定过程简单直接,被越来越多地广泛采用,但因为数据处理方式和仪器精度的问题,其数均分子量、重均分子量与分散度结果存在较大误差。
The weight average molecular weight, the diffusion coefficient, both the hydrodynamic and gyration radii, and the shape of the flocculation particles can be determined by laser light scattering.
综述了利用该技术可实现对絮凝剂胶体分子粒径、形态结构、粒径分布和重均分子量的精确测量 ,论述了激光散射技术在絮凝剂沉降性能的研究及絮凝剂改进提高方面的重要作
The intrinsic viscosity was measured by Ubbelohde Viscometer and the number-average molecular weight was determined by Vapor Permeation Osmeter (VPO).
通过测定含侧氨基聚二甲基硅氧烷聚合物的数均分子量和特性粘数,对MHS方程中的常数K和α进行了订正,得到的MHS方程表述为:[η]=3。
In this paper,the conditions and effecting factors in determination of the number-average molecular weight for EO-THF copolyethers were studied and discussed.
本文对气相渗透法（ＶａｐｏｒＰｒｅｓｓｕｒｅＯｓｍｏｍｅｔｒｙ，简称ＶＰＯ）测定环氧乙烷（ＥＯ）－四氢呋喃（ＴＨＦ）共聚醚的数均分子量的测试条件和影响因素进行了研究和讨论。
Discussion on Experimental Process of Determining Viscosity-average Molecular Weight of UHMWPE by Viscosity Method
黏度法测试UHMWPE黏均分子量实验过程探讨
Determining the Molecular Weight of Chitosan;
黏度法测定壳聚糖的相对分子质量的研究
Determination of time for blank solution in molecular weight measurement by viscometry
黏度法测分子质量中空白溶液流出时间的确定
Quantitative Molecular Biological Study on Surgical Margins in Oral Squamous Cell Carcinoma
口腔黏膜鳞癌手术切缘的分子生物学定量研究
Two Calculations of Average Energy of Rigid Double-Atom Molecule;
刚性双原子分子平均能量的两种求法
Regulating Molecular Weight of Homopolymer of DMDAAC by Chain-transfer Agent
链转移剂调控DMDAAC均聚物分子量
Effect of Weiyanyin on Content of Intercellular Adhesion Molecule 1 in Gastric Mucosa of Experimental Bile Reflux Gastritis Rats
胃炎饮对实验性胆汁反流性胃炎大鼠胃黏膜细胞间黏附分子1含量的影响
It shows that the solution viscosity drops and the relative molecular mass reduces with narrow distribution.
结果表明改性栲胶溶液黏度下降，相对分子质量降低且分布集中。
Study on higher Mr forms of whey protein inhibiting adhesion of Helicobacter pylori
高分子量乳清蛋白抑制幽门螺旋杆菌黏附性研究
Effect of Low Molecular Weight Agarieus Blazei Murill Polysach-aride on Colon Carcinoma HT-29 Cell-endothelium migration and Adhesion
低分子量姬松茸多糖对HT-29细胞与内皮细胞迁移、黏附的影响
Preparation of CPCS Series Polymeric Quarternary Ammonium Salts of Low Molar Mass as Clay Stabilizers
CPCS系列低相对分子质量聚季铵盐黏土防膨剂的研制
The antigens were found to be homogenious and have a molecular weight of 87000 dalton asdetermined by gel-electrophoresis method.
电泳分析得全抗原分子量平均为87000道尔顿。
Study on average molecular weights of the distillated fractions from different coal-derived oils
煤液化生成油窄馏分平均分子量的研究
Effects of FR/MA on High Metastasis Lung Cancer Cell Line Adhesion to Endothelial Cells and the Expression of Adhesion Molecules
FR/MA抑制PG-HUVEC细胞黏附及黏附分子表达的研究
Relational Expression of Average Molecular Weight of Alkyd Resin with Degree of Reaction
醇酸树脂数均分子量与反应程度的关系
Determination of number average molecular mass of chitosan-oligosaccharide by acetylacetone method
乙酰丙酮法测定甲壳胺寡糖数均分子量
On Characteristics of Light Scattering by Inhomogeneous Particles and Measurement of Refractive Index Profile;
非均匀粒子光散射特性及折射率分布测量研究
The effects of the mole ratio of anhydride to amino group of chitosan in the feed solution on the solubility, intrinsic viscosity and molecule weight of the product were studied.
研究了投料物质的量比对产物的溶解性、特性黏度和相对分子质量的影响。