论文部分内容阅读
夏天外出,总要面临防晒的问题,而防晒的种种细节,你是否知道哪些可以做,哪些不能做?防晒首选效果好的化学性防晒剂。防晒剂可分为化学性紫外线吸收剂和物理性紫外线屏蔽剂。化学防晒霜主要成分是对氨基苯甲酸、肉桂酸酯类、苯酮类等化学物质,虽然这些物质通过吸收紫外线起到防晒的作用,但同时也会被皮肤吸收,对皮肤有一定的毒性和刺激性。而物理防晒霜主要成分是氧化锌和二氧化钛,这些矿物颗粒能直接阻
Summer go out, always have to face the problem of sunscreen, and sunscreen all the details, do you know what can be done, what can not be done? Sun preferred good chemical sunscreen. Sunscreens can be divided into chemical UV absorbers and physical UV screening agents. Chemical sunscreens are mainly composed of p-aminobenzoic acid, cinnamic acid esters and benzophenones. Although these substances act as sunscreens by absorbing ultraviolet rays, they are also absorbed by the skin and have some toxicity to the skin. Irritating The main component of physical sunscreen is zinc oxide and titanium dioxide, these mineral particles can be directly blocked