[化學] 化學修飾；化學改質
To reduce the toxicity by the chemical modification.
通過化學修飾減低神經毒素的毒性。
This research advance was summarized in synthetic methods of the isoflavone derivatives in chemical modification.
本文從異黃酮側鍊化學修飾出發綜述了該類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.
用甘氨酸甲酯對抗凍多肽B的羧基進行了化學修飾的動力學研究，表明羧基為其活性功能團，其三個二次羧基中僅有一個是必需基團。
Chemical modification of GS indicated that sulfhydryl group, tryptophan and arginine residues had no relation to enzyme activity.
化學修飾表明，該酶活力與硫氫基、色氨酸、精氨酸殘基無關；
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.
天然膠原機械力學性能差，易降解，經交聯、酯化等化學修飾與改性可提高其機械力學性能和抗降解性，改性後作為生物材料可廣泛使用。
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.
實驗結果表明，空氣中，多壁碳納米管薄膜對水分子的吸收是最主要的作用，并讨論了其氣敏性質與薄膜比表面積及化學修飾之間的關系。
The structure, principles and methods of chemical modification of hemicelluloses are briefly introduced, and the latest development of chemical modification of hemicelluloses is reviewed.
簡要介紹了半纖維素的結構及其化學改性原理和方法，綜述了近幾年國内外半纖維素化學改性的研究狀況；
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，化學改性包括端基改性、主鍊改性、再分配反應改性。
This review covers the recent progress in chemical modification of chitosan.
對近年來殼聚糖在化學改性方面的工作進行了綜述。
The advancement in the research of chitin and chitosan's chemical modification is generalized.
介紹了甲殼素和殼聚糖化學改性的研究進展。
General chemical modification methods were given. The general modifiers include alcohol, organosilicon compound, polymer and silane coupling agent.
列舉了常見的二氧化矽化學改性方法，其改性劑主要有醇、有機矽化合物、聚合物、矽烷偶聯劑。
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.
全面介紹了近年來常用的幾種化學和物理改性酚醛樹脂方法，以及對刹車片摩擦材料性能的影響。
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.
本發明公開了一種疊氮基封端的聚合物的制備方法及其對碳納米管表面的化學修飾的方法。
Pore and surface chemical modification technology of zeolite is an important way of second synthesis of molecular sieves.
本文對磁性分離載體制備工藝和表面化學修飾方法的研究進展情況進行了綜述。
To improve the level of the waste plastic, the chemical modification is further stu***d on the basis of the colour aggravation.
為了提高廢舊塑科回收産品的檔次，在前期化學消色改性的基礎上，對其進行化學改性以提高其力學性能。
Chemical modification can be realized by material and surface modification, while physical modification is mainly realized by material modification.
其中，化學改性可以通過膜材料和膜表面的化學改性來實現；而物理改性則主要是通過材料改性來實現。
Chapter 4 provides further guidance and strategies for scaling down unit operations, including chromatography, chemical modification reactions, ultrafiltration, and microfiltration.
第四章對規模縮小的單元操作，包括色譜，化學改變反應，超濾和微孔過濾提供了進一步的指南和戰略。
A-type casting adhesive based on PVA as mian material has been prepared by chemical modification.
以聚乙烯醇為主要原料，采用化學改性的方法成功制備了A型鑄造粘合劑。
The methods were physical and chemical modification. The character of the materials were compared.
同時對比了改性前和改性後各種聚合物膜的物性特點。
It stu***s the orderliness of chemical modification to asphalt's performances that include softening point, penetration and low temperature ductility.
詳細研究了化學改性對SBR改性乳化瀝青主要性能包括軟化點、針入度和低溫延度的影響規律。
Chemical modification status of convention ADC through adding composite auxiliaries was introduced.
介紹了采用添加複合助劑的方法對常規ADC進行化學改性的情況。
By chemical modification of guar gum, developed the ultra-temperature guar gum, and characterized the ultra-temperature guar gum by IR, AFM and SEM.
通過對瓜膠進行化學改性，研制了耐高溫的超高溫瓜膠，用紅外光譜儀、原子力顯微鏡和掃描電鏡對超高溫瓜膠結構進行了表征。
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.
為了克服大豆磷脂的這一缺陷，擴大它的應用範圍，本文采用化學改性法對大豆磷脂進行改性研究。
The process comprises the three parts of a first separation, chemical modification and a second separation.
包括一次分離、化學改性、二次分離三部分。
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化學改性可通過分子設計合成特定結構的PHB共聚物，具有物理共混無法比拟的優勢，特别是在組織工程領域有着廣泛的應用前景。
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.
為進一步擴大殼聚糖的應用範圍和開發出具有優良性能的新化合物，需對殼聚糖進行各種改性研究。
Chemical modification is one of the most universal methods.
化學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.
對以硫酸鋁、水玻璃為主要原料合成超細矽酸鋁的具體實驗條件進行了深入研究。
化學修飾（Chemical Modification） 是指通過特定的化學反應，有目的地改變分子（如蛋白質、核酸、碳水化合物、脂質或合成聚合物）的化學結構或組成的過程。其核心目标在于賦予物質新的物理、化學或生物學特性，以滿足特定的應用需求。這一概念在生物化學、材料科學、藥物研發等領域具有基礎性地位。
其詳細含義和應用主要體現在以下幾個方面：
改變分子性質與功能：
引入報告基團或功能基團：
改善藥物的藥代動力學特性：
研究結構與功能關系：
創造新型生物偶聯物：
總結來說，化學修飾是一種強大的工具性技術，它通過精确的化學反應對分子進行“改造”，旨在可控地優化其固有性質、賦予其全新功能、或将其轉化為更適用于研究、診斷或治療的形态。 其在基礎科學探索和現代技術應用（尤其是生物醫藥和先進材料）中不可或缺。
Chemical Modification（化學修飾）指通過化學方法改變物質的分子結構，以調控其物理化學性質或生物功能的過程。以下是詳細解釋：
如需進一步了解具體技術或應用場景，可參考相關化學詞典或生物化學文獻。
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