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水滑石(LDHs)及其衍生物在生物医药领域的研究进展 总被引:2,自引:0,他引:2
生物医学涉及到人类健康相关的多个领域: 临床医疗、公共卫生、医药研发等多个方面. 其中在医药研发领域, 基于插层结构的纳米药物载体的研发已经成为重要发展方向之一. 水滑石(LDHs)及其衍生物具有成本低、合成简单、载药高效、细胞膜透过率高、生物相容性好、易降解等优点, 在生物医药领域得到了广泛关注. 本文主要介绍了LDHs及其衍生物的制备方法, 以及在抗菌治疗、生物成像和肿瘤治疗等方面的应用. 此外, 还简述了LDHs材料的规模化生产方法和现状, 进一步分析了LDHs的实际应用前景. 最后, 对LDHs材料在生物医药领域的未来发展方向进行了展望. 相似文献
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层状双金属氧化物材料(LDHs)作为最常见的二维材料,在环境污染治理领域展现出巨大的优势. LDHs具有来源广泛、易于制备、较大的表面积、可调控的化学结构、环境友好等优点,最近几年其改性材料多用于放射性核素的高效去除.本文介绍了常用的LDHs材料及其衍生物的制备方法以及它们在放射性核素处理方面的应用及其相互作用机制,最后对LDHs材料的应用和挑战给出了个人见解.本综述为高效去除放射性核素的LDHs材料的设计指明了方向,为放射性核素的高效处理处置提供了新材料. 相似文献
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水滑石(LDHs)是一种阴离子黏土材料,由于其主体层板厚度的可调性,使其在光/电催化、电池、超级电容器、传感器以及生物医药等领域都具有广泛应用。降低层厚至单层可使材料的物理化学性质发生根本改变,从而优化催化性能。近期研究表明,利用自上而下,自下而上的方法,可以实现单层LDHs类材料的合成,但是受限于产量(g级)以及成本设备等问题,目前规模化制备高质量单层LDHs类材料还没有工业案例。成核晶化隔离法是目前唯一规模化合成纳米LDHs的工业化方法,具有成本低,产量可吨级放大等优点。本综述从合成方法、表征手段、应用三个角度讨论了单层及超薄LDHs的精准调控,详细论述了近期关于单层及超薄LDHs合成突破以及LDHs的规模化生产进展,并对其性能进行了总结,为后续设计高性能单层LDHs提供思路。 相似文献
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碳纳米材料是一类推动能源存储、 多相催化、 高性能复合和生物医药等领域发展的重要材料, 可控合成碳纳米材料对相关领域的发展具有重要意义. 水滑石(LDHs)材料具有层板金属种类及含量可调等特点, 经焙烧、 还原后可制备出金属种类、 密度和粒径分布各异的高分散、 高稳定金属纳米催化剂, 可实现高效催化生长各种类型的碳纳米材料. 此外, 通过调控反应条件和反应器等, 可以影响LDHs基金属纳米催化剂催化生长的碳纳米材料的结构和性能. 本文总结了LDHs基金属纳米催化剂的可控制备、 碳纳米材料结构调控以及利用LDHs基催化剂制备的碳纳米材料的应用等方面的研究工作, 并阐明了催化剂的可控制备是控制合成碳纳米材料的核心手段, 这为利用LDHs基催化剂进一步合成更高性能碳纳米材料的研究指明了方向. 此外, 本文还结合近些年在光、 电及光热催化方面的研究进展, 展望了基于新型LDHs纳米结构生长碳纳米材料的研究前景. 相似文献
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The main chemical approaches to the study of macromolecular structure and dynamics and to the elucidation of interbiopolymer
contact points are considered and illustrated by particular examples. Primary attention is paid to the chemical footprinting
and affinity modification methods. The use of bifunctional reagents for the study of nucleoprotein structure architecture
is described. The ways of enhancing the selectivity of affinity modification available from the literature are analyzed with
an emphasis on catalytically competent (superselective) labeling. The identification of proteins responsible for replication
of the tickborne encephalitis virus by this method is described to demonstrate the possibility of the application of the method
to multicomponent systems such as the nucleus fraction of infected cells.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1225–1231, July, 1999. 相似文献
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Dr. Fa-Jie Chen Dr. Mengmeng Zheng Vincent Nobile Dr. Jianmin Gao 《Chemistry (Weinheim an der Bergstrasse, Germany)》2022,28(20):e202200058
This work reports a novel chlorooxime mediated modification of native peptides and proteins under physiologic conditions. This method features fast reaction kinetics (apparent k2=306±4 M−1s−1 for GSH) and exquisite selectivity for cysteine residues. This cysteine conjugation reaction can be carried out with just single-digit micromolar concentrations of the labeling reagent. The conjugates show high stability towards acid, base, and external thiol nucleophiles. A nitrile oxide species generated in situ is likely involved as the key intermediate. Furthermore, a bis-chlorooxime reagent is synthesized to enable facile Cys-Cys stapling in native peptides and proteins. This highly efficient cysteine conjugation and stapling was further implemented on bacteriophage to construct chemically modified phage libraries. 相似文献
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S. V. Dezhurov I. R. Grin I. V. Safronov G. V. Shishkin O. I. Lavrik S. N. Khodyreva 《Russian Chemical Bulletin》2005,54(5):1311-1321
dUTP and dCTP derivatives containing a 4-azido-2,3,5,6-tetrafluorobenzylideneaminooxy group were incorporated into the 3′-end
of the DNA primer within complexes with the DNA-matrix as analogs of natural dTTP by virtue of catalytic activity of DNA polymerase
β or endogenous DNA polymerases of the cell extract. The photoreactive DNAs synthesized in situ were used for affinity modification of DNA polymerase β and DNA-binding proteins of the cell extract. For the photoreactive
DNA based on these analogs, the efficiency of formation of covalent adducts with DNA polymerase β under the highest degree
of DNA complexation with the enzyme was determined. The yield of covalent DNA adducts with the enzyme was 28–47%, depending
on the type of the analog. The effect of the sequence of the DNA template near the localization of the photoreactive group
on the redistribution of covalent cross-links between the possible targets was demonstrated. A possibility of increasing the
efficiency of DNA polymerase β modification in the presence of a substantial excess of photoreactive DNA using a sensitizer,
a dUTP derivative containing a pyrene residue, was studied. When photoreactive DNA containing a 2,3,5,6-tetrafluoro-4-azidobenzoyl
(FAB) group was used, about 60% of DNA polymerase β was covalently attached to DNA. Photoreactive dNTP analogs ensuring a
high level of protein modification in the cell extract were found.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1273–1283, May, 2005. 相似文献
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石油资源的短缺以及减轻石油基聚合物所产生的环境负担的必要性,推动了生物可降解材料的开发和生产。近几十年来天然聚合物由于无毒性、可生物降解性和生物相容性正在某些领域取代目前的合成聚合物。淀粉由于其可再生性、可生物降解性、低成本和易获得性已经被广泛研究用于制造可生物降解的复合材料,应用于农业、食品、医药和包装行业。但淀粉的多羟基结构赋予其很强的亲水性,这种湿度敏感性限制了它们的机械性能并影响到其应用。本文主要从提高热塑性淀粉耐水性的物理与化学作用机理的角度出发,总结和归纳了近年来国内外以提高热塑性淀粉材料的耐水性能和降低其对环境湿度敏感性为目的的研究工作,介绍了影响耐水性能的相关因素以及改善方法,并指出今后研究工作的发展方向。 相似文献
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Benzotriazolization of 2,4-dihydroxyacetophenone and 2,4-dihydroxybenzophenone has given dibenzotriazolized products: 3,5- [di (2H-benzotriazole-2-yl)]2,4-dihydroxyacetophenone, and 3,5-[di (2H-benzotriazole-2-yl)] 2,4-dihydroxybenzophenone. These compounds are expected to be effective and useful UV absorbers as they both have the 2 (2-hydroxyphenyl)2H-benzotriazole unit and the 2-hydroxybenzophenone (or acetophenone) unit in the molecule. The compounds were characterized by their spectral behavior and particularly by careful study of their UV spectrum. 相似文献