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[化学] 化学修饰；化学改质
To reduce the toxicity by the chemical modification.
通过化学修饰减低神经毒素的毒性。
This research advance was summarized in synthetic methods of the isoflavone derivatives in chemical modification.
本文从异黄酮侧链化学修饰出发综述了该类化合物衍生物的合成研究。
Kinetic stu***s on chemical modification of the carboxyl groups indicate that only one out of the three COOH side chains was found to be essential for the activity of AFP-B of Winters Flounder.
用甘氨酸甲酯对抗冻多肽B的羧基进行了化学修饰的动力学研究，表明羧基为其活性功能团，其三个二次羧基中仅有一个是必需基团。
Chemical modification of GS indicated that sulfhydryl group, tryptophan and arginine residues had no relation to enzyme activity.
化学修饰表明，该酶活力与硫氢基、色氨酸、精氨酸残基无关；
However, in order to be widely used, purified collagen needs chemical modification, such as cross-linking and esterification, to improve its chemical and biomechanical properties.
天然胶原机械力学性能差，易降解，经交联、酯化等化学修饰与改性可提高其机械力学性能和抗降解性，改性后作为生物材料可广泛使用。
The experimental results show that in air, adsorption of water vapor dominates. Influence of the ratio surface area and chemical modification on its gas sensitive behavior was also discussed.
实验结果表明，空气中，多壁碳纳米管薄膜对水分子的吸收是最主要的作用，并讨论了其气敏性质与薄膜比表面积及化学修饰之间的关系。
The structure, principles and methods of chemical modification of hemicelluloses are briefly introduced, and the latest development of chemical modification of hemicelluloses is reviewed.
简要介绍了半纤维素的结构及其化学改性原理和方法，综述了近几年国内外半纤维素化学改性的研究状况；
The physical modification included filling and blending modifications. The chemical modification included modifications of terminal groups, main chain, and redistribution.
物理改性包括填充和共混改性，化学改性包括端基改性、主链改性、再分配反应改性。
This review covers the recent progress in chemical modification of chitosan.
对近年来壳聚糖在化学改性方面的工作进行了综述。
The advancement in the research of chitin and chitosan's chemical modification is generalized.
介绍了甲壳素和壳聚糖化学改性的研究进展。
General chemical modification methods were given. The general modifiers include alcohol, organosilicon compound, polymer and silane coupling agent.
列举了常见的二氧化硅化学改性方法，其改性剂主要有醇、有机硅化合物、聚合物、硅烷偶联剂。
The chemical modification and physical modification of phenolic resin are introduced roundly in recent years, and their effects on friction performance of brake pad are also discussed.
全面介绍了近年来常用的几种化学和物理改性酚醛树脂方法，以及对刹车片摩擦材料性能的影响。
The invention discloses a preparation method of an azido blocking polymer and a method of the chemical modification of the azido blocking polymer for the surface of carbon nano tubes.
本发明公开了一种叠氮基封端的聚合物的制备方法及其对碳纳米管表面的化学修饰的方法。
Pore and surface chemical modification technology of zeolite is an important way of second synthesis of molecular sieves.
本文对磁性分离载体制备工艺和表面化学修饰方法的研究进展情况进行了综述。
To improve the level of the waste plastic, the chemical modification is further stu***d on the basis of the colour aggravation.
为了提高废旧塑科回收产品的档次，在前期化学消色改性的基础上，对其进行化学改性以提高其力学性能。
Chemical modification can be realized by material and surface modification, while physical modification is mainly realized by material modification.
其中，化学改性可以通过膜材料和膜表面的化学改性来实现；而物理改性则主要是通过材料改性来实现。
Chapter 4 provides further guidance and strategies for scaling down unit operations, including chromatography, chemical modification reactions, ultrafiltration, and microfiltration.
第四章对规模缩小的单元操作，包括色谱，化学改变反应，超滤和微孔过滤提供了进一步的指南和战略。
A-type casting adhesive based on PVA as mian material has been prepared by chemical modification.
以聚乙烯醇为主要原料，采用化学改性的方法成功制备了A型铸造粘合剂。
The methods were physical and chemical modification. The character of the materials were compared.
同时对比了改性前和改性后各种聚合物膜的物性特点。
It stu***s the orderliness of chemical modification to asphalt's performances that include softening point, penetration and low temperature ductility.
详细研究了化学改性对SBR改性乳化沥青主要性能包括软化点、针入度和低温延度的影响规律。
Chemical modification status of convention ADC through adding composite auxiliaries was introduced.
介绍了采用添加复合助剂的方法对常规ADC进行化学改性的情况。
By chemical modification of guar gum, developed the ultra-temperature guar gum, and characterized the ultra-temperature guar gum by IR, AFM and SEM.
通过对瓜胶进行化学改性，研制了耐高温的超高温瓜胶，用红外光谱仪、原子力显微镜和扫描电镜对超高温瓜胶结构进行了表征。
In order to overcome these shortcomings of the soybean phospholipids, as well as expand their applied fields, the modification of soybean phospholipid are investigated by using chemical modification.
为了克服大豆磷脂的这一缺陷，扩大它的应用范围，本文采用化学改性法对大豆磷脂进行改性研究。
The process comprises the three parts of a first separation, chemical modification and a second separation.
包括一次分离、化学改性、二次分离三部分。
The chemical modification of PHB can get PHB copolymer with specific structure by molecule design and has more advantages than physical blending. The PHB copolymer c…
PHB化学改性可通过分子设计合成特定结构的PHB共聚物，具有物理共混无法比拟的优势，特别是在组织工程领域有着广泛的应用前景。
In order to expand its application and develop new compounds which have good nature, various stu***s of the chemical modification of chitosan are necessary.
为进一步扩大壳聚糖的应用范围和开发出具有优良性能的新化合物，需对壳聚糖进行各种改性研究。
Chemical modification is one of the most universal methods.
化学法改性是常用的方法。
The preparation of ultra-fine aluminum silicate powders by chemical precipitation-coating modification was stu***d in this paper.
对以硫酸铝、水玻璃为主要原料合成超细硅酸铝的具体实验条件进行了深入研究。
化学修饰（Chemical Modification） 是指通过特定的化学反应，有目的地改变分子（如蛋白质、核酸、碳水化合物、脂质或合成聚合物）的化学结构或组成的过程。其核心目标在于赋予物质新的物理、化学或生物学特性，以满足特定的应用需求。这一概念在生物化学、材料科学、药物研发等领域具有基础性地位。
其详细含义和应用主要体现在以下几个方面：
改变分子性质与功能：
引入报告基团或功能基团：
改善药物的药代动力学特性：
研究结构与功能关系：
创造新型生物偶联物：
总结来说，化学修饰是一种强大的工具性技术，它通过精确的化学反应对分子进行“改造”，旨在可控地优化其固有性质、赋予其全新功能、或将其转化为更适用于研究、诊断或治疗的形态。 其在基础科学探索和现代技术应用（尤其是生物医药和先进材料）中不可或缺。
Chemical Modification（化学修饰）指通过化学方法改变物质的分子结构，以调控其物理化学性质或生物功能的过程。以下是详细解释：
如需进一步了解具体技术或应用场景，可参考相关化学词典或生物化学文献。
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