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二氧化硅包载对维生素C稳定性提高的研究
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作者 石美玲 陈娟博 +4 位作者 李皓 黄员琴 张启清 曾飒 孟涛 《日用化学工业(中英文)》 CAS 北大核心 2024年第9期1015-1022,共8页
针对化妆护肤用品中亲水活性成分维生素C(Vc)稳定性差的问题,采用二氧化硅负载Vc(Vc@SiO_(2))并通过硅烷改性(Vc@s-SiO_(2))分散在辛酸/癸酸甘油三酯(GTCC)油相体系中提升其稳定性。实验结果表明:Vc负载于二氧化硅中,包封率为68.2%、载... 针对化妆护肤用品中亲水活性成分维生素C(Vc)稳定性差的问题,采用二氧化硅负载Vc(Vc@SiO_(2))并通过硅烷改性(Vc@s-SiO_(2))分散在辛酸/癸酸甘油三酯(GTCC)油相体系中提升其稳定性。实验结果表明:Vc负载于二氧化硅中,包封率为68.2%、载药率为13.6%;改性后Vc@s-SiO_(2)表面疏水,接触角由33.6°增大为130.7°;分别在紫外光照射和50℃下静置时,Vc@s-SiO_(2)相较于游离Vc能相应提高11.4倍和27.7倍相对抗氧化活性。研究表明二氧化硅负载Vc并分散于GTCC中能够隔绝水和氧等不利因素,降低活性损失,提高Vc的稳定性。 展开更多
关键词 生物活性物 二氧化硅 维生素C 硅烷改性 稳定性
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Indole derivatives as agrochemicals:An overview
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作者 Ping Sun yuanqin huang +3 位作者 Shunhong Chen Xining Ma Zhaokai Yang Jian Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第7期66-72,共7页
Indole is a biologically active compound formed by the fusion of benzene and pyrrole,and it is widely found in natural products and drugs.Due to the unique structure and properties of indole,its derivatives often exhi... Indole is a biologically active compound formed by the fusion of benzene and pyrrole,and it is widely found in natural products and drugs.Due to the unique structure and properties of indole,its derivatives often exhibit distinctive physiological activities,which has led to widespread attention in the field of pesticide development.Analyzing the design strategies and structure-activity relationships(SARs)of compounds is a crucial step in developing novel pesticides.This review mainly summarizes indole compounds with plant growth regulating,antiviral,fungicidal,herbicidal,and insecticidal activities,with the aim of providing new insights into the discovery and mechanism of action of novel indole-based pesticides. 展开更多
关键词 Indole compounds Agrochemicals Biological activity Structure-activity relationship Mechanism of action
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