搜索结果: 46-60 共查到“理学 pH”相关记录291条 . 查询时间(0.167 秒)
Potentiometric open-cell titration for seawater alkalinity considering temperature dependence of titrant density and Nernst response of pH electrode
Balkalinity open-cell titration potentiometric method HCl density Nernst response
2017/4/11
The total alkalinity (AT) of seawater is one of the parameters required to characterize carbonate systems, which are
essential for studying the greenhouse effects of carbon dioxide (CO2) on the Earth...
Effects of metal ions and pH on the formation and decomposition rates of di- and tri-peptides in aqueous solution
salt-induced peptide formation metal ions copper (II) complex with glycine hydrothermal system prebiotic chemistry, origin of life
2017/4/11
The recent discovery of active deep-sea hydrothermal systems venting high-pH fluids suggests that the prebiotic chemistry
of the hydrothermal systems of early Earth may have been more diverse than pr...
pH响应性P(MMA-co-MAA-co-HEMA)微凝胶的制备及其性能（图）
预乳化乳液法 pH响应性微凝胶 相转变 储能模量
2013/12/14
利用预乳化乳液法制备了不同单体配比的聚(甲基丙烯酸甲酯-co-甲基丙烯酸-co-甲基丙烯酸羟乙酯)(P(MMA-co-MAA-co-HEMA))微凝胶分散液;采用透射电子显微镜、动态光散射仪研究了微凝胶的微观形态、粒径大小及其溶胀率;利用试管倒转法对微凝胶分散液的凝胶化相转变行为进行了研究,借助椎板流变仪考察了所形成胶态凝胶的储能模量与单体配比、微凝胶分散液浓度和温度的关系.结果表明,所制备的微凝...
山东大学化学与化工学院无机与分析化学实验课件 醋酸电离常数测定—pH法。
Effect of Acacia karroo Supplementation on Growth, Ultimate pH, Colour and Cooking Losses of Meat from Indigenous Xhosa Lop-eared Goats
Acasia karroo Supplementation Goat Performance Meat Quality
2016/5/11
The objective of the study was to determine the effect of Acacia karroo supplementation on growth, ultimate pH, colour and cooking losses of meat from indigenous Xhosa lop-eared goats. Eighteen castra...
采用开环聚合、发散法以及"点击化学法"合成了线型-树状聚两性电解质.首先通过γ-苄基-L-谷氨酸酯羧酸酐(BLG-NCA)的开环聚合及发散合成法分别合成了叠氮端基聚(γ-苄基-L-谷氨酸酯)(PBLG-N3)及以炔基为内核的带有4个伯氨端基的第2.0代聚酰胺-胺(PAMAM-D2),再将二者通过"点击反应"制备的线型-树状嵌段共聚物PBLG-b-D2作为大分子引发剂,利用其末端氨基引发ε-苄氧羰基...
利用异喹啉类生物碱小分子化合物与腺嘌呤（A碱基）在酸性条件结合力下降的特点，以具有良好生物相容性、DNA酶切保护性以及易于生物修饰的二氧化硅纳米颗粒为载体，发展了一种基于聚A链（Poly（A））/二氧化硅纳米颗粒（Poly（A）/SiNPs）的pH可控释放抗肿瘤药物体系. 在该体系中，选择了甲氧檗因（coralyne）作为药物模式分子，通过共价修饰方法在二氧化硅纳米颗粒表面修饰Poly（A），获得...
聚甲基丙烯酸单层保护金纳米粒子的制备及pH响应性聚集（图）
聚甲基丙烯酸 金纳米粒子 聚集 pH响应性
2013/12/17
通过可逆断裂链转移加成聚合,制备了单分散的聚甲基丙烯酸叔丁酯,并一步水解获得了具有硫醇端基的聚甲基丙烯酸(PMAA).在还原氯金酸为金纳米粒子的同时,利用硫醇端基与金纳米粒子(GNPs)的耦合作用,一步获得了聚甲基丙烯酸单层保护的金纳米粒子.通过紫外光谱和透射电镜表征证实,金纳米粒子为单分散的球型颗粒,在水溶液中具有长期稳定性.聚甲基丙烯酸单层保护的金纳米粒子的光学性质和聚集状态,具有明显的pH响...
陈鹏研究组发展出适用于强酸性环境的活细胞pH探针（图）
陈鹏 强酸性环境 pH荧光探针
2012/7/31
2012年7月4日，生命科学联合中心陈鹏课题组在Angewandte Chemie International Edition（《德国应用化学》）在线发表了名为《Converting a solvatochromic fluorophore into a protein-based pH indicator for extreme acidity》的科研论文 (Angew. Chem. 2012,...
Octanol-water partition coefficients (Kow) vs. pH for fluorescent dye tracers (fluorescein, eosin Y), and implications for hydrologic tracer tests
fluorescein eosin Y tracer octanol-water retardation
2017/4/11
Values of the octanol-water partition coefficient (Kow) have been measured vs. pH for two fluorescent dyes (fluorescein,
eosin Y) commonly used in hydrologic tracer tests. Values for both fluorescent...
The effect of pH on the uptake of zinc and cadmium in marine phytoplankton: Possible role of weak complexes
zinc cadmium weak complexes
2014/4/4
In natural samples from the New Jersey coast and the Gulf of Alaska, zinc (Zn) and cadmium (Cd) uptake
rates by phytoplankton decreased on average about 30% as pH was decreased from 8.5 to 7.9 or 7.7...
The effect of pH on the uptake of zinc and cadmium in marine phytoplankton: Possible role of weak complexes
The effect of pH on the uptake zinc cadmium marine phytoplankton Possible role of weak complexes
2014/4/2
In natural samples from the New Jersey coast and the Gulf of Alaska, zinc (Zn) and cadmium (Cd) uptake rates by phytoplankton decreased on average about 30%as pH was decreased from 8.5 to 7.9 or 7.7, ...
通过一次平衡法考察了pH、离子强度和溶剂介电常数对红壤吸附低分子量有机酸的影响。研究结果表明,随着溶液pH值的升高有机酸的吸附量降低,其中草酸和酒石酸的吸附量在pH3.5~5.0范围内随着pH值的升高而急剧下降,之后缓慢下降(pH5.0~7.0)。柠檬酸、酒石酸和苹果酸的吸附量在1~2mmol/L初始浓度范围内随着离子强度的增加没有明显变化,但在2~20mmol/L初始浓度范围内却随着离子强度的增...
Uptake properties of Eu(III) on Na-attapulgite as a function of pH, ionic strength and temperature
Eu(III) Sorption Na-attapulgite pH Ionic strength Thermodynamic data
2011/11/10
Herein, the sorption properties of Eu(III) on Na-attapulgite were performed by using batch sorption experiments under different experimental conditions, such as contact time, pH, ionic strength, humic...
Subtle pH differences trigger single residue motions for moderating conformations of calmodulin
intracellular pH sensing conformational change energy landscape perturbation response scanning molecular dynamics
2011/8/4
Abstract: This study reveals the essence of ligand recognition mechanisms by which calmodulin (CaM) controls a variety of Ca2+ signaling processes. We study eight forms of calcium-loaded CaM each with...