防晒剂防晒机理及其应用

阳光中的紫外线能杀死或抑制皮肤表面的细菌,促进皮肤中的脱氢胆固醇转化为维生素D,还能增强人体的抗病能力,促进人体的新陈代谢,对人体的生长发育有重要作用。另一方面,紫外线对人体皮肤和头发有伤害作用。紫外辐射(UV)能引起皮肤灼伤和红斑,促使皮肤过早老化,引起角膜及,压缩机内氟里昂(CFC)的泄漏量也在不断增加,从而使臭氧层产生的空洞加剧,地面受到紫外辐射的强度有增高的趋势。因此对紫外线、防晒剂及其制品的研究也得到了众多学者的关注。1紫外线及其对人体的影响1.1紫外线阳光由电磁波谱的许多波长组成。当阳光穿透地球大气层,其…     

头发中重金属的研究进展

重金属是环境中一类很难降解的无机污染物,并且具有较强的生物富集性,可以通过各种途径进入人体内并在体内长期积累,最终对人体健康造成危害。主要对人体头发中重金属的正常参考值进行总结,对不同地区、不同居民头发中重金属的含量值进行系统阐述,分析其原因及影响因素,并就存在的问题和发展趋势进行了总结。     

第十三届国际化妆品化学师协会报告题目

有关皮肤与头发 (一)用科学方法对面部皮肤类型分类的进展 H.Kumagai等(日本) (二)在机械力影响下皮肤的特性,如年纪的作用及化妆品处理的影响 C.Cipriani等(意大利) (三)尿素通过皮肤的吸收 Ch.Ackermann等(南非) (四)黑色素及黑色素一角质素结合物的光化学特性 R.Arnaud等(法国) (五)皮肤与头发的电性能 E.D.Goddard,P.S.Leung(美国) (六)生物萃取物SOBRE对呼吸组织的作用 LENDAN,S.A:Bareelona(西班牙)     

夏天护发难题应对

夏天的头发经常出现各种问题,那我们也根据各种问题提出最具体的解决方案。对策一天天洗发,让头皮也深呼吸 1.清洗灰尘脏污无论什么季节最好天天洗头汗水、油脂、污垢容易堵塞毛孔,让头皮发痒,散发不好闻的气味:而且最好选择含有氨基酸.蛋白质、复合维他命等活性成分的温和洗护产品, 2.游泳或运动后要用微酸性洗发品游泳和运动后,汗水、海     

防晒剂中纳米氧化锌的安全性研究进展

纳米氧化锌在防晒剂中的广泛应用,使得其安全性成为近年来研究的热点.总结了防晒剂中纳米氧化锌人体暴露的主要途径及人体吸收的情况,分析了纳米氧化锌的细胞毒性、基因毒性及光毒性,认为防晒剂中的纳米氧化锌不经正常皮肤吸收,对人体安全性无明确的影响,不失为一种高效、安全的防晒剂.但应进一步研究纳米氧化锌在受损皮肤吸收的情况以及经...     

儿童及成人头发皮质醇检测方法的建立及应用

目前检测皮质醇主要的方法是通过检测血液、唾液以及尿液中的皮质醇浓度,但这只能反映人体的应激压力,而头发皮质醇含量则可以反映人体慢性压力。建立了一种定量检测头发皮质醇含量的方法,比较了一步法与四步法测定头发皮质醇含量的差异,探讨了磷酸盐缓冲液(PBS)体积、样品放置时间等因素对测定结果的影响。结果表明,四步法比一步法更加有利于充分提取出头发中的皮质醇;溶解5 mg头发皮质醇的最佳PBS体积为170μL;皮质醇溶液放置7 d后,会随时间的延长而降解,对最终检测结果造成影响。使用该方法对20例头发样本中的皮质醇含量进行了测定,结果表明儿童中女生头发皮质醇含量比男生高,成人中男性头发皮质醇含量比女性高。     

有机硅帮助解决夏日护发难题

肌肤需要加以呵护，头发自然也不例外，如果没有有效防护，夏日的阳光、风沙、潮气和游泳等多方面的原因，很容易使头发变得干枯、受损和卷曲。不论在海滩，还是在运动场上，怎样才能使秀发在这炎热的夏日里看着最美？     

营养美容与美容食品

介绍了几种有益于人体健康的营养保健产品。有益于皮肤、头发和指甲健康的产品是营养产品类的基础。目前,在美容食品方面,最新的潮流是服用粉末形式的增补剂来取得最佳的健康皮肤状况。     

傅立叶变换红外光谱法无创伤监测血糖

手掌皮肤及其表面分泌物可以表征人体中的血糖,用红外光谱仪测试手掌皮肤及其表面分泌物谱图,由谱图中1 120cm-1左右的吸收峰的强度来判断人体中血糖的高低.该方法对人体无任何创伤,是以后血糖检验的主要发展方向.     

VegeshineTM SA--优秀的皮肤和头发调理剂

人类能自身合成饱和脂肪酸，但不能合成不饱和脂肪酸。人体内缺少某种脂类，尤其是亚油酸时，会出现类似于湿疹、鱼鳞癣、头屑等症状及一般性的皮肤、头发，指甲不健康状态。皮肤外用亚油酸及其衍生物是行之有效的皮肤保健措施，新生组织生长、受伤组织的修复过程都需要亚油酸。由此可见，亚油酸是人体所不     

皮肤细胞培养技术在化妆品功效研究中的应用

皮肤细胞的体外培养技术一直是化妆品相关皮肤领域研究的重要手段。从传统的各种皮肤细胞单层培养以皮肤细胞的三维培养技术等多种培养模型。重建表皮具有分化的特征，与真皮类似物组成简化的人的皮肤。皮肤的三维培养因其具有类似于人体皮肤的特点而成为化妆品研究中的理想模型。这些培养技术的发展对延缓皮肤衰老、美白化妆品配方研制及护发产品开发具有广泛应用价值，更是基础研究必不可少工具。     

黑泥对小鼠皮肤胶原蛋白和毛发生长的影响

研究黑泥对小鼠皮肤和毛发生长的作用。将黑泥涂抹于小鼠脱毛皮肤部位,观察涂抹部位毛发生长情况,35d后取涂抹部位皮肤,测定SOD活性、胶原蛋白和丙二醛量,扫描电镜观察毛发表面结构。结果表明：黑泥能明显增加小鼠皮肤中胶原蛋白的量,提高皮肤中SOD的活性,有降低皮肤中丙二醛量的趋势,促进毛发生长,增加毛发表面光滑度。黑泥具有延缓皮肤衰老、促进毛发生长和提高毛发质量的作用。     

Time-Course Expression Profiles of Hair Cycle-Associated Genes in Male Mini Rats after Depilation of Telogen-Phase Hairs

Jcl:WistarTGN(ARGHGEN)1Nts rat (Mini rat) is a growth hormone (GH)-deficient transgenic rat. The hair cycle in the dorsal skin of male Mini rats enters a long-lasting telogen phase after eights weeks of age, but depilation can induce a transient hair cycle again. In this study, a time-course profiling of genes expression was done on the dorsal skin of male Mini rats along the progression of depilation-induced hair cycle using DNA microarray analysis. As a result, 1,215 probe sets including 1,171 hair cycle-related ones showed more than 3-fold changes in expression compared with that in before-depilation telogen phase. The present data will contribute to elucidating the mechanisms of hair cycle regulation and should lead to the identification of novel molecular targets for hair growth and/or depilation agents.     

独特的皮肤和头发调理剂--ArlasilkTM Phospholipid系列

磷脂是人体的天然成分之一,也是一种可以为头发和皮肤提供营养、保湿、清洁和调理的理想选择。有利凯玛的Arlasilk Phospholipid系列实际上是一种仿生磷脂,它模仿了人体细胞天然磷脂的结构,并在此基础上加上改进,从而可以为护肤品和发用品提供一系列的配方功效。     

Development of a multi‐layered skin simulant for burn injury evaluation of protective fabrics exposed to low radiant heat

To simulate temperature rise of human skin and to predict burn injury during radiant heat exposure, the traditional method is to use a sensor to simulate skin surface and use a numerical model to simulate heat transfer in inner skin. However, the numerical models of skin burns are based on few experimental data of nude skin and some simplifications of human skin characteristics. In this study, a new multi‐layered skin simulant is presented for low radiant heat exposures up to 15 kW/m². The skin simulant has implanted thermocouples into layered polydimethylsiloxane (PDMS) materials with controlled thermal properties and thicknesses of the skin layers. The multi‐layered skin simulant developed in this study has a good reproducibility for temperature measurements with similar temperature rise profiles compared with human skin except at skin surface. For burn injury prediction, the results of our PDMS skin model can be linearly corrected using ASTM model as a reference. Our developed skin simulant provides an advanced method to directly simulate the heat transfer inside human skin in a multi‐layered structure rather than using the combined physical sensor‐numerical model in the traditional way.     

源自植物的化妆品

简要论述了体现绿色环保价值的化妆品,以及绿色化妆品原料的纯天然植物提取物。介绍了源自纯净植物嫩芽的护肤品、源自植物的胶原蛋白护肤品、源自植物的精油护肤品、护发品以及一些健康护肤理念,从根源上改善头发和肌肤问题,促进后续保养品的吸收。     

男士化妆品市场进展

从男士皮肤的生理结构入手,介绍了男士化妆品的主要功效。男士美容已从传统的洗脸和剃须延伸到皮肤、头发和身体的各个部位的护理。重点介绍了须用产品和皮肤营养美容产品的新进展。     

Overexpression of Flii during Murine Embryonic Development Increases Symmetrical Division of Epidermal Progenitor Cells

Epidermal progenitor cells divide symmetrically and asymmetrically to form stratified epidermis and hair follicles during late embryonic development. Flightless I (Flii), an actin remodelling protein, is implicated in Wnt/β-cat and integrin signalling pathways that govern cell division. This study investigated the effect of altering Flii on the divisional orientation of epidermal progenitor cells (EpSCs) in the basal layer during late murine embryonic development and early adolescence. The effect of altering Flii expression on asymmetric vs. symmetric division was assessed in vitro in adult human primary keratinocytes and in vivo at late embryonic development stages (E16, E17 and E19) as well as adolescence (P21 day-old) in mice with altered Flii expression (Flii knockdown: Flii^+/−, wild type: WT, transgenic Flii overexpressing: Flii^Tg/Tg) using Western blot and immunohistochemistry. Flii^+/− embryonic skin showed increased asymmetrical cell division of EpSCs with an increase in epidermal stratification and elevated talin, activated-Itgb1 and Par3 expression. Flii^Tg/Tg led to increased symmetrical cell division of EpSCs with increased cell proliferation rate, an elevated epidermal SOX9, Flap1 and β-cat expression, a thinner epidermis, but increased hair follicle number and depth. Flii promotes symmetric division of epidermal progenitor cells during murine embryonic development.     

The Human Microbiota and Skin Cancer

Skin cancer is the most common type of cancer in the US with an increasing prevalence worldwide. While ultraviolet (UV) radiation is a well-known risk factor, there is emerging evidence that the microbiota may also contribute. In recent years, the human microbiota has become a topic of great interest, and its association with inflammatory skin diseases (i.e., atopic dermatitis, acne, rosacea) has been explored. Little is known of the role of microbiota in skin cancer, but with the recognized link between microbial dysbiosis and inflammation, and knowledge that microbiota modulates the effect of UV-induced immunosuppression, theories connecting the two have surfaced. In this paper, we provide a comprehensive review of the key literature on human microbiota, especially the skin microbiota, and skin cancer (i.e., non-melanoma skin cancer, melanoma, cutaneous T cell lymphoma). Also, mechanistic perspectives as to how our microbiota influence skin cancer development and treatment are offered.     

Surface,tribological, and mechanical characterization of synthetic skins for tribological applications in cosmetic science

Synthetic skin as an ideal human‐tissue substitute is needed for the research and assessment of hair‐ and skin‐care products. In this study, a systematic study was carried out of the surface, tribological, and mechanical properties of two synthetic skins and rat skin with and without skin‐cream treatment with scanning electron microscopy, atomic force microscopy, and a nanoindenter. The film thickness, adhesive force, coefficient of friction, surface roughness, and contact angle of the two synthetic skins and rat skin were comparable. The hardness of one synthetic skin was more similar to rat skin. After treatment with skin cream, the trends of the properties of the two synthetic skins and rat skin were similar. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011