几种天然抗氧化剂在化妆品中的应用研究

简述了人体皮肤老化的原因和表现形式。从来源上重点介绍了几种常见的天然抗氧化剂茶多酚、迷迭香提取物、竹叶提取物以及番茄红素在各种化妆品中的应用情况。结合天然抗氧化剂的特点,展望了天然抗氧化剂在化妆品中的发展趋势。     

番茄红素的性质及其在化妆品中的应用

番茄红素是一种已经被证明具有良好抗氧化功能的物质,备受消费者关注。本文就番茄红素的资源、理化性质及其在化妆品中的应用做了较为详尽的综述。     

表面活性剂在化妆品中的应用

论述了表面活性剂的功能,如润湿、分散、乳化、增溶、起泡、消泡和洗涤去污等功能,以及在化妆品中的作用.介绍了表面活性剂和化妆品的分类情况,化妆品的原料以及化妆品对表面活性剂的要求.详细介绍了化妆品中常用的几种表面活性剂.对化妆品中用的表面活性剂的发展趋势进行了阐述.     

化妆品标签新规倍受关注

对我国的中医药文化在化妆品中的应用进行了论述。对我国的中药化妆品市场进行了分析。对“中草药”列人化妆品标识禁语,化妆品中禁用中药的表述在业界引起了争议。建议国家有关部门更好地利用我国的中药、中草药资源,加大对药妆的扶持力度以及化妆品市场的监管力度,在保护我国中草药日化市场的同时,提高企业的美容中医理论与中草药研究的技术水平和中草药化妆品的质量。     

纳米技术在防晒化妆品中的应用

随着纳米技术在化妆品中的应用越来越广泛,在防晒化妆品的研发过程中,通过对纳米技术的应用,能够使防晒化妆品中的功效成分得到充分的发挥,从而提高防晒化妆品的防晒性能。作者针对纳米技术在防晒化妆品中的应用及进展进行了综述,希望能为广大的化妆品领域工作者一些参考。     

化妆品中微量元素对健康影响的分析

随着化妆品行业的不断发展,市面上出现了越来越多的化妆品,这些化妆品中也不乏低劣的不符合国家要求的、本文基于影响着人身体健康的化妆品中的微量元素进行探究,让人们更了解化妆品中的微量元素、含量以及这些微量元素超出规定对人身体健康的危害,并对事例进行分析让人们对化妆品有一个更深层次的了解,提高人们在使用过程中的警惕性。     

电化学分析法在美容化妆品中重金属离子测定方面的研究进展

人们对美容化妆品的质量和成分日益重视,化妆品中的重金属不仅会影响它的质量和使用感,而且人们的健康因此会受到损害。对美容化妆品中的重金属进行检测,对化妆品的品质和化妆品业的发展方面有积极的意义。对近年来电化学分析法在重金属离子测定方面的最新研究进展进行概述,以期为美容化妆品中重金属离子测定提供理论指导。     

高效液相色谱内标法测定番茄系列产品中的番茄红素

首次建立了对番茄系列产品中的番茄红素进行检测的高效液相色谱内标法。以β-胡萝卜素为内标;采用乙腈、甲醇、四氢呋喃溶液作为流动相,DAD检测器检测,在485 nm检测波长下,对番茄果汁饮料、番茄酒中的番茄红素进行了检测。结果表明,番茄红素在0.05~1.00 mg/mL范围内线性关系良好,相关系数为0.992,回收率为97%~100%,相对标准偏差为2.73%~5.76%。该方法具有高灵敏度、低检出限及响应时间快等特点。     

生物技术在提高化妆品功效及功效检测中的应用

介绍了生物技术在提高化妆品功效性中的作用，详细论述了生物技术在化妆品的抗衰老、美白和抗氧化等功效检测中发挥的重要作用。现代生物技术不仅可以对化妆品原料、产品进行生物学功效和安全性检测，还能够在化妆品研究开发、生产及加工等多个环节中得到广泛的应用，还预测了利用现代生物技术来评价化妆品的综合功效，这将会是今后化妆品功效性评价的趋势。     

化妆品中甲醛含量的测定方法

甲醛由于其亲水性好、杀菌效率高、价格低廉以及不受体系中的酸碱度的影响等优点,而用作化妆品的防腐剂。但甲醛对人体健康的危害很大,因此需要对化妆品中的甲醛含量进行检测。本文详细介绍了测定化妆品中甲醛含量的方法,并对每种方法进行评价和总结。随着化妆品防腐技术的不断发展,未来的化妆品中将会彻底禁用甲醛。     

Lycopene content and lipophilic antioxidant capacity of by-products from Psidium guajava fruits produced during puree production industry

The comparison of lycopene content and lipophilic antioxidant capacity was explored among pink guava fruit and by-products of its puree production industry namely refiner, siever and decanter. Lycopene content was measured using both UV-vis spectrophotometer and high performance liquid chromatography (HPLC) methods. Atmospheric pressure chemical ionization liquid chromatography-mass spectrometry (APCI-LC-MS) was applied in confirming the studied compound. Two assays were employed to determine the lipophilic antioxidant capacities namely lycopene equivalent antioxidant capacity (LEAC) and β-carotene bleaching assays. Lycopene content and antioxidant capacity were in the order of fruits > decanter > siever > refiner. Decanter exhibited the highest lycopene content and antioxidant among the studied by-products. It also gave a significant higher (p < 0.05) lycopene content than pink guava fruit based on the wet basis. There was a significant correlation between lycopene content and LEAC. All samples had a good antioxidant activity in β-carotene bleaching assay but negatively correlated to lycopene content. Decanter was found to be the highest in lycopene content (17 mg/100 g dry basis) and antioxidant capacity (22 μmol LE/100 g dry basis) among the by-products. This by-product of pink guava puree industry can be a potential source of lycopene and antioxidant compounds.     

食用油提取番茄中番茄红素的研究

番茄红素是一种脂溶性的天然色素，具有较强的抗氧化和防癌、抗癌作用。文章采用自溶法利用植物油脂将番茄中的番茄红索提取出来，提取效率是传统提取方法4倍。并通过实验研究了时间、料液比、浸提次数、搅拌等因素对番茄红素提取效果的影响，确定了最佳的提取工艺条件。用豆油作溶剂，在pH为8的条件下，反应温度35℃，料液比1：1，在0i断搅拌下，浚捉3h，分次进行浸提、过滤、合并浸提液，且进行2级浸捉效果最好。这种方法解决了传统有机溶剂提取番茄红素产率低，并且存在溶剂存昭的问题．简椎方便，适用于工业化生产。     

绿色化妆品时代的来临

随着消费者对更天然、更安全化妆品的追崇,概述了天然有机化妆品市场的发展状况。在分析绿色化妆品含义的基础上。对我国绿色化妆品行业的生产、使用和消费等环节中存在的问题进行了论述。分析了目前天然化妆品市场所面临的困难。提出了天然和有机原料是目前化妆品市场的最佳卖点。针对目前我国绿色化妆品行业法律滞后,法规缺乏或不健全的现状,“有机产品”或“天然产品”的法规尚属空白,提出尽早建立天然化妆品认证标准的重要性,使所有的绿色化妆品得到健康发展。对天然化妆品发展状况、未来趋势及发展前景进行了回顾和展望。     

The Potential Role of Lycopene for the Prevention and Therapy of Prostate Cancer: From Molecular Mechanisms to Clinical Evidence

Lycopene is a phytochemical that belongs to a group of pigments known as carotenoids. It is red, lipophilic and naturally occurring in many fruits and vegetables, with tomatoes and tomato-based products containing the highest concentrations of bioavailable lycopene. Several epidemiological studies have linked increased lycopene consumption with decreased prostate cancer risk. These findings are supported by in vitro and in vivo experiments showing that lycopene not only enhances the antioxidant response of prostate cells, but that it is even able to inhibit proliferation, induce apoptosis and decrease the metastatic capacity of prostate cancer cells. However, there is still no clearly proven clinical evidence supporting the use of lycopene in the prevention or treatment of prostate cancer, due to the only limited number of published randomized clinical trials and the varying quality of existing studies. The scope of this article is to discuss the potential impact of lycopene on prostate cancer by giving an overview about its molecular mechanisms and clinical effects.     

The influence of carotenoids and tocopherols on the stability of safflower seed oil during heat-catalyzed oxidation

The stability and antioxidant effects of carotenoids and tocopherols in safflower seed oil were evaluated under thermal (75°C) and oxidative conditions and the oxidative stability index (OSI) determined. The antioxidant capability of butylated hydroxytoluene (BHT) was also compared with that of β-carotene in a model system. Lycopene and β-carotene (1 to 2000 ppm) were heated (75°C) and exposed to air (2.5 psi) in an oxidative stability instrument. β-Carotene had no antioxidant effect at concentrations below 500 ppm, because it did not alter the induction time. Lycopene increased the induction time only slightly at low concentrations. However, at concentrations greater than 500 ppm, both β-carotene and lycopene acted as prooxidants, significantly decreasing the induction period. At the highest concentration, 2000 ppm, lycopene was more prooxidative than β-carotene. α- and γ-Tocopherol (concentration, 1000 ppm) delayed the induction time by 16 and 26 h, respectively. There was no cooperative interaction between α-tocopherol and β-carotene in delaying the onset of oxidation. Furthermore, BHT was significantly more antioxidative than β-carotene. Thus, under thermal and oxidative conditions, β-carotene could not delay the onset of oxidation. The tocopherols and BHT were effective in suppressing the onset of oxidation, as determined by the oxidative stability measurement.     

化妆品原料使用频率情况调查

化妆品是由各种原料经过合理调配加工而成的复配混合物.调查了102批次化妆品的全成分表,对不同类型的化妆品使用的主要原料进行了统计,得出化妆品原料中使用频率较高的原料有表面活性剂十二烷基硫酸钠、柔润剂乙二醇二硬脂酸酯和聚二甲基硅氧烷、乳化剂鲸蜡硬脂醇、防腐剂异噻唑啉酮、螯合剂乙二胺四乙酸二钠、抗氧化剂抗坏血酸和调节剂柠檬酸,并对使用频率较高的化妆品原料的管理提出建议.     

Oils and fats,the historical cosmetics

Many of the uses of oils and fats in cosmetics are the same as those of antiquity. However, technical progress has taken these natural materials apart and put them together differently. So now cosmetic chemists have the advantages of both natural and man-made fats and oils. Furthermore, today there are available a variety of antioxidants which extend the shelf life of cosmetics made with them.     

纳米TiO_2与天然紫外吸收剂防晒效用的研究

对具有防晒作用的数十种天然植物 ,进行了提取、复配 ,复配后的产品加入纳米TiO2 ,并在应用上进行了相关的研究与测试。测试结果表明 :天然防晒剂护肤品 ,对 2 80～ 32 0nmB区紫外光透射率≤ 1 5 % ,对 330～40 0nmA区紫外光透射率≤ 16 %。并与国内市场上较流行的JapanUVMILKYUPERSPF 45 ,在同等条件下进行了测试对比 ,结果表明 :本产品在 2 80～ 35 0nm波段 ,对紫外光的透射率为0 2 2 %～ 3 30 % ,UVMILKYUPERSPF 45为 2 2 2 %～3 90 % ;本产品在 36 0～ 40 0nm波段 ,对紫外光的透射率为 5 31%～ 15 78% ,UVMILKYUPERSPF 45为 4 2 3%～ 4 95 %。     

白芨-丹皮酚包合物在化妆品中的应用研究

化妆品正在形成天然化和功能化的新趋势。“组分天然化”和“回归大自然”的呼声已成为世界化妆品工业的潮流。当今国际化妆品的品位已经由天然成分所占的比例来决定,高档化妆品无一不是以其产品化学成分含量少为荣。开发中药白芨-丹皮酚包合物作为天然功能组分不仅会有很好的化妆品市场前景,同时,还将探明白芨-丹皮酚这种纯天然保湿成膜剂和抗菌剂进一步应用于医药品、日化产品甚至食品工业等领域的应用价值。