青刺果油的保湿性研究

对青刺果油在护肤品中的保湿性进行了探讨,将青刺果油添加在普通护肤产品中,与空白对照组进行皮肤保湿性对比实验,检测产品使用后180 min内肌肤含水量的变化,来评价产品的保湿效果.结果表明,添加青刺果油的产品比未添加青刺果油的产品可显著提高皮肤的水分,所以可以将青刺果油作为化妆品中的保湿添加剂来使用,具有广阔的应用前景.     

青刺果油组合物的抗氧化及保湿活性研究

寻找青刺果油组合物来提高产品抗氧化能力及保湿活性。将青刺果油组合物应用于产品中，通过DPPH自由基清除率以及失水率的测定，研究其抗氧化能力及保湿活性。结果表明，在干燥环境下青刺果油组合物样品随时间增加，保湿率逐渐降低，但每个时间段内其保湿率均高于对照样品（青刺果油含量0.11%）；与对照样品相比，添加了虾青素、橙皮素的青刺果油样品对DPPH自由基清除能力较强；将虾青素和橙皮素组合后，提取组合物浓度在50%时DPPH自由基清除能力也可达到90%左右。研究初步验证了青刺果油组合物具有较强的自由基清除能力和保湿性能，为拓展青刺资源的综合利用供了初步的应用研究。     

影响青刺果油过氧化值因素的研究

为了得到青刺果油的最佳保存条件,对不同产地、不同年限的青刺果油的过氧化值进行了比较,研究了青刺果油过氧化值随时间的变化以及水分含量和维生素E(VE)纯度对其过氧化值的影响。结果表明:维西新果新油的初始质量较好,其过氧化值随时间的延长而增加;过高的水分含量对维西新果新油的过氧化有很大的促进作用;在维西新果新油中加入质量分数为50%的VE时,可以有效抑制其过氧化反应的速率。     

青刺果化妆品应用研究

本文介绍了青刺果的成份及在化妆品中的应用,并通过配方实例说明了青刺果在护肤霜,护发香波及护唇膏中的使用方法。     

几种有机磷农药防治双齿青刺蛾效果试验

几种有机磷农药防治双齿青刺蛾效果试验崔士英，齐志广，左德远（河北师范大学生物系，石家庄０５１１１６）双齿青刺蛾（Ｐａｒａｓａｈｉｌａｒａｔａｓｔａｕｄｉｎｇｅｒ）又称棕边青刺蛾、棕边绿刺蛾、小青刺蛾，在石家在地区是核桃、柿子、枣、杏等果树的重要食叶性...     

柑橘保湿霜的制作与保湿效果测试

本试验通过研究植物黄酮类物质用于化妆品的效果,选择以柑橘黄酮类提取物、乳木果脂、丁二醇、玻尿酸、海藻糖、EDTA-Na_2、柠檬酸、VE、尼泊金甲酯等为材料制备植物黄酮类保湿护肤霜,分别测定30 min、1 h时的皮肤含水量。对所得数据进行方差分析和多重比较,结果表明:柑橘保湿霜可以保湿,但保湿效果没有花青素保湿效果理想。     

青莲舒敏美白养肤药妆水的研制

青莲舒敏养肤药妆水是以青刺果油和莲叶提取物为主要原料,设计优化配方制备抗敏美白养肤的药妆水,并对药妆水的基础理化指标、安全性、稳定性、持水性、美白性能等指标进行初步检测。结果表明青莲舒敏养肤药妆水具有良好的稳定性,符合国家质量标准;对皮肤无刺激性,有良好的吸附性和分散性,安全性较好;还具有很好的持水性;另外随着有效成分的增加能够很好的降低皮肤中黑色素的含量,具有美白效果。     

柑桔贮藏保鲜试验研究结果

本文介绍了以药剂处理为主的一套柑桔贮藏保鲜技术，在采收时用咪鲜安，异菌脲，２，４－滴的混合药液浸果，配合塑料袋单果包装及通风保温保湿措施，可有效地降低烂果率减少内含物质的变化，提高柑桔保鲜贮藏质量。     

含高内相凝胶乳液的护肤乳液开发与性能研究

将以水溶性乳木果油为乳化剂,包裹生育酚醋酸酯的葡萄籽油为油相制备的高内相凝胶乳液作为化妆品油相兼具功效组分加入护肤乳液体系中,测试了护肤乳液的理化指标,研究了其保湿性和抗氧化能力。结果表明,含高内相凝胶乳液的护肤乳液为水包油乳液,黏度较低,p H值适中,能够抵抗储存、加热、冷冻、离心等外界条件而保持良好的稳定性,室温下短期（2周内）存放时菌落总数符合国家标准,使用时有较好的保湿能力和抗氧化能力。     

成都生物所发现一种对柑桔病原菌有抑制作用的植物提取物

<正>近日,中国科学院成都生物研究所"对柑桔病原菌有抑制作用的植物提取物及其制备方法和用途"获国家知识产权局发明专利(专利号:ZL201310195394.6)。柑桔青霉病和绿霉病分别是由意大利青霉菌(Penicillium italium)和绿霉菌(Penicillium digitaum)引起的植物病害。据统计,柑桔果实在贮运过程中因烂果造成的损失以柑桔青霉病和绿霉     

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.     

Colour and tolerance of preferred skin colours on digital photographic images

Skin‐tone has been an active research subject in photographic colour reproduction. There is a consistent conclusion that preferred skin colours are different from actual skin colours. However, preferred skin colours found from different studies are somewhat different. To have a solid understanding of skin colour preference of digital photographic images, psychophysical experiments were conducted to determine a preferred skin colour region and to study inter‐observer variation and tolerance of preferred skin colours. In the first experiment, a preferred skin colour region is searched on the entire skin colour region. A set of nine predetermined colour centers uniformly sampled within the skin colour ellipse in CIELAB a*b* diagram is used to morph skin colours of test images. Preferred skin colour centers are found through the experiment. In a second experiment, a twice denser sampling of nine skin colour centers around the preferred skin colour center determined in the first experiment are generated to repeat the experiment using a different set of test images and judged by a different panel of observers. The results from both experiments are compared and final preferred skin colour centers are obtained. Variations and hue and chroma tolerances of the observer skin colour preference are also analysed. © 2011 Wiley Periodicals, Inc. Col Res Appl, 2013     

一种防敏理肤霜的人体功效研究

对一种防敏理肤霜进行了功效评价。选择20名18~50岁的健康女性,用质量分数为3%的十二烷基硫酸钠(SLS)溶液在双前臂内侧做封闭型斑贴试验24 h诱导产生红斑,使用受试产品防敏理肤霜,通过反复测量受试区域皮肤的经表皮失水率(TEWL值)、皮肤红色素含量以及对皮肤红斑进行评分,评估防敏理肤霜的舒缓修复效果。结果表明,受试产品防敏理肤霜能降低皮肤受到外界刺激因素后皮肤TEWL值,修复皮肤屏障功能,同时改善皮肤红斑情况,对受损皮肤具有一定的舒缓修复功效。     

抗衰老化妆品发展趋势

对导致皮肤衰老的主要原因以及对皮肤产生危害的各种因素进行了分析。阐述了化妆品配方中一些新的活性物质对皮肤抗衰老的作用。介绍了一些新的抗衰老化妆品以及人们对护肤的新概念。论述了目前抗衰老的热点和抗衰老化妆品的发展趋势。     

祛斑化妆品功效评价

从科学角度简要介绍了皮肤色斑的形成、祛斑化妆品作用原理,色斑长期以来一直是困扰人类皮肤的一大问题;并重点介绍了国内外祛斑化妆品产品的功效评价方法和进展,随着祛斑化妆品越来越广泛的应用,其功效评价方法受到了人们的广泛关注,评价方法包括照相法、皮肤荧光色素检测法、反射光谱测量法、三色分析法、漫反射光谱法和数字化成像定量技术等;同时展望了祛斑化妆品产品的未来发展趋势,为我国祛班美容事业的发展提供参考。     

红泥在皮肤清洁产品中的应用评价

介绍了一种新型洁肤用添加剂——红泥，并对红泥在皮肤清洁产品中的作用进行了研究，结果表明，红泥能显著提高活性剂型洁面剂、皂类洁面剂和面膜的清洁功效，是一种高效的洁肤用化妆品原料。     

Biological Mechanisms Underlying the Ultraviolet Radiation-Induced Formation of Skin Wrinkling and Sagging I: Reduced Skin Elasticity,Highly Associated with Enhanced Dermal Elastase Activity,Triggers Wrinkling and Sagging

The repetitive exposure of skin to ultraviolet B (UVB) preferentially elicits wrinkling while ultraviolet A (UVA) predominantly elicits sagging. In chronically UVB or UVA-exposed rat skin there is a similar tortuous deformation of elastic fibers together with decreased skin elasticity, whose magnitudes are greater in UVB-exposed skin than in UVA-exposed skin. Comparison of skin elasticity with the activity of matrix metalloproteinases (MMPs) in the dermis of ovariectomized rats after UVB or UVA irradiation demonstrates that skin elasticity is more significantly decreased in ovariectomized rats than in sham-operated rats, which is accompanied by a reciprocal increase in elastase activity but not in the activities of collagenases I or IV. Clinical studies using animal skin and human facial skin demonstrated that topical treatment with a specific inhibitor or an inhibitory extract of skin fibroblast-derived elastase distinctly attenuates UVB and sunlight-induced formation of wrinkling. Our results strongly indicated that the upregulated activity of skin fibroblast-derived elastase plays a pivotal role in wrinkling and/or sagging of the skin via the impairment of elastic fiber configuration and the subsequent loss of skin elasticity.     

一款含鲜奶面霜缓解皮肤红斑反应的功效评价研究

采用客观仪器评价方法对含鲜奶面霜单次使用后的缓解皮肤红斑反应的功效进行研究。选择30名18~55周岁有效受试者为研究对象,使用胶带粘贴及组胺刺激构建皮肤红斑反应模型,并采用无创仪器的方式检测并记录实验组、安慰剂组、阴性组及空白组受试者在组胺造模前、造模后、涂抹产品后30 min和60 min时的皮肤红斑指数EI值、皮肤敏感度值,采集皮肤图像,通过SPSS数据统计软件对实验结果进行统计分析。结果显示,含鲜奶面霜可以持续改善皮肤红斑指数EI值和皮肤敏感度,缓解由组胺导致的皮肤红晕反应,说明其具有一定的缓解皮肤红斑反应,改善皮肤敏感状态的功能。     

胶清凝固工艺的研究

研究了表面活性剂和氯化钙作为胶清的凝固体系,对胶清凝固效果和胶清橡胶性能的影响。结果表明,在胶清中加入十二烷基硫酸钠和氯化钙,可在36 h内使胶清完全凝固。当十二烷基硫酸钠为0.2%、氯化钙为3.0%时,胶清的凝固效果较好,胶清橡胶具有良好的综合性能。     

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