白刺色素和黑果枸杞色素中花色苷与总多酚的测定

采用紫外-可见分光光度法测定白刺色素和黑果枸杞色素中的花色苷和总多酚的含量,白刺色素的花色苷和总多酚含量分别为4.6、0.10mg/g,黑果枸杞色素的花色苷和总多酚含量分别为14.6、0.22mg/g。该方法操作简单、灵敏度高,适宜检测花色苷和总多酚的含量。该实验为以后的白刺色素和黑果枸杞色素的开发与利用提供理论依据。     

红木色素稳定性的研究

用碱溶酸沉的处理方法对红木种子进行重复浸提,提取红木色素,在不同理化条件下,对红木色素的稳定性进行了研究。结果表明,该色素对ｐＨ值,光照,耐热等不同条件,表现出不同程度的稳定性,研究稳定性有利于色素在生产中科学地应用。     

观赏南瓜色素的提取及性质研究

对观赏南瓜色素的提取及性质进行了初步的探索,研究了光、温度、pH、氧化剂、还原剂、常用的食品添加剂对色素的影响.结果表明:观赏南瓜色素对光和热都比较稳定;适宜在pH值4-12之间使用;耐氧化性和耐还原性均较好;Vc对色素有一定的消色作用;柠檬酸三钠对色素有增色作用;色素对常用的食品添加剂有较强稳定性.     

火龙果果皮色素的提取及稳定性

采用不同比例的水与乙醇混合液作为提取剂、不同的超声波提取时间、不同的火龙果果皮重量,研究了火龙果果皮色素的提取条件。其提取液最大吸收波长在538nm处,长时间放置后色素被氧化,其氧化产物最大吸收波长在390nm处。还研究了火龙果果皮色素与食品添加剂共存的情况。     

江门市2004年-2006年腊味中色素监测结果分析

对江门市2004-2006年腊味在色素进行监测,并对色素使用情况进行评估.在市区各农贸市场及各大超市,各腊味制品工厂和加工场抽取126份样品,进行检验,被检样品中发现46份违规添加色素,其中有部分是胭脂红,有部分是苋菜红,少量是柠檬黄,并且有部分样品添加非食用色素-苏丹红.江门市腊味中色素使用情况经过整顿已经明显改观,但仍有必要加强有关的监测和溯源分析.     

用同步荧光光谱法研究细胞色素C与胱氨酸的相互作用

用同步荧光技术研究了细胞色素Ｃ与促进剂胱氨酸的相互作用，分别监测了二者相互作用时细胞色素Ｃ中色氨酸残基和酪氨酸残基的荧光光谱的变化和二种氨基酸残基的荧光强度随的变化，实验结果表明，胱氨酸分子与细胞色素Ｃ的赖氨酸残基缓慢结合，二者相互作用的最终结果使细胞色素Ｃ分子的构象发生了微小的变化。     

弱离子交换分离葡萄皮色素物质及其光吸收特性

通过Cellulose DE-25弱离子交换色谱对葡萄皮水溶性和脂溶性色素进行分离并对各色素物质进行光吸收扫描分析.结果表明,从葡萄皮中分离得到不同的8种色素物质.光吸收特性分析初步判断8种色素中有2种属于花色素类,2种属于儿茶素类；另4种色素分别为反式白藜芦醇苷、醌类、非酚类物质的色素和一种由多种物质聚合而成的深褐色素.研究为了解葡萄皮颜色构成物的种类、性质以及利用葡萄皮渣等提供了实验数据.     

桑色素荧光法测定痕量猪的反应机理研究

本文对桑色素荧荧光法测定痕量的反应机理进行了较为详细的研究。确定了该反应的络合比，用荧光法，紫外吸收法和红餐吸收法确定了反应的位置，从而得到了桑色素荧光法测痕量猪的理论根据。     

黑果枸杞色素中原花青素含量测定

采用紫外-可见分光光度法测定黑果枸杞色素中的原花青素的含量,黑果枸杞色素中原花青素含量是22g/100g。该方法操作简单、灵敏度高,适宜检测色素中原花青素的含量,为以后的黑果枸杞色素的开发与利用提供理论依据。     

细胞色素bc_1复合物的共振拉曼光谱

对不同氧化还原状态的细胞色素 bc_1复合物的共振拉曼光谱进行了分析比较。对部分拉曼信号的变化进行了指认。细胞色素 c_1的还原引起1640cm~(_1)和1560cm~(_1)及1454cm~(_1)的明显变小,细胞色素 b 的还原引起1544cm~(_1)的下降。这些信号可以标志复合物中不同色素的氧化还原状态,对拉曼方法用于研究呼吸链酶系有重要参考价值。     

微波消解-ICP-MS同时测定珠光颜料中的8种元素

采用微波消解-电感耦合等离子体质谱法(ICP-MS)同时测定珠光颜料中Pb、Cd、As、Hg、Ba、Cr、Sb、Se8种元素的含量.各元素的校准曲线线性关系良好(r=0.9991-1.0000),检出限为1.17-30.59μg/L,用标准加入法作了回收率实验,在1.0-10mg/kg水平回收率在94.5%-101.7...     

光谱分析技术在彩绘文物颜料分析中的应用

对颜料进行准确、无损或微损分析是文物保护领域研究的热点与难点。随着文物保护研究的不断开展及多学科技术的广泛交叉、融汇,各种光谱技术逐渐被应用到彩绘文物颜料的分析之中。从元素分析、结构分析、微区与形貌分析三方面探讨了X荧光光谱分析法、激光拉曼光谱法、光导纤维反射光谱法等常用光谱分析技术在彩绘文物颜料分析中的应用、特点、局限性及应用前景。     

西藏扎什伦布寺壁画的科学研究

壁画是寺院建筑的重要装饰元素,也是藏传佛教艺术的重要组成部分。扎什伦布寺始建于明正统12年（公元1447年）,作为后藏最大的寺院,寺内保存了大量精美壁画,这些壁画对研究藏传佛教及佛教艺术具有重要意义。扎什伦布寺自建寺起一直为传播佛教文化服务,经历了频繁的大规模修建。为了解扎什伦布寺壁画的制作材料与工艺,为今后壁画的保护及修复提供重要的参考及科学支撑,选取寺内强巴佛殿四层北壁、吉康扎仓南殿西侧的典型壁画,共采集8个样品。采用超景深三维视频显微镜观察壁画的制作结构,显微激光拉曼光谱仪对有机与无机颜料的成分信息进行表征,偏光显微镜根据晶体的光学信息鉴别拉曼光谱相似的颜料颗粒,X射线衍射仪用于测定地仗成分,扫描电镜/能谱仪则对微观数据进行确认和补充。通过分析研究,壁画由地仗层、准备层、颜料层构成。颜料包括矿物及人工合成颜料,其中红色颜料为朱砂与颜料红14,绿色颜料为块铜矾、酞菁绿,黑色颜料为碳黑,黄色颜料为雌黄,蓝色颜料为合成群青。颜料红14与酞菁绿为有机合成颜料,合成群青则为无机合成颜料。块铜矾作为矿物颜料,在欧洲曾用于架上画、壁画、手稿等艺术作品中,但在国内还未曾发现其使用历史,这一发现扩展了对绿色颜料的认识。壁画的地仗层依据藏式壁画制作传统使用了阿嘎土,准备层则由黄土制备。研究结果表明,壁画制作时以阿嘎土打底,刷一层黄土找平壁面,以胶调和颜料绘制于黄土层之上。壁画除了使用一些常见的传统藏式壁画材料,还发现了一些近代人工合成材料,说明扎什伦布寺强巴佛殿四层北壁及吉康扎仓南殿西侧壁画曾经历过重绘或补绘。该研究结果不仅弥补了扎什伦布寺壁画的研究空缺,也为扎什伦布寺修缮历史的补充及完善提供了重要证据。     

河南怀菊色素的提取条件

以河南怀菊为材料,对河南怀菊中色素的提取条件进行了探讨.结果表明,水浴提取的最佳条件:温度60℃,提取次数6次,料液比1∶15(g∶mL).     

Non-Destructive In-Situ Study of White and Black Coating on Painted Pottery Sherds From Bancun Site (Henan,China) by Raman Microscopy

Abstract

Pottery sherds from the archaeological site of Bancun (Henan, China) were analyzed by Raman microscopy and the pigments used in the coating of this ancient (c. 4000–5000 BC) pottery were determined. It was found that bauxite was used to make the white pigment. The black coating was identified as a magnetite and its particle size was in the nanometer range. This work also showed that the size of pigment had influence on the color of the coating. In principle, Raman spectra could be used not only to identify the mineral source of the pigment but also to estimate the particle size of the pigments.     

Raman Microspectroscopic Analysis of Polychrome Wooden Artifact from the Astana Tomb of the Tang Dynasty,Xinjiang, ChinaEI北大核心CSCD

The Turpan District is characterized by a typical dry climate, so that many organic relics have been well preserved. A piece of wooden artifact with 9 colors was unearthed from Astana graveyard which is rich in cultural connotations. In the present paper, Raman microscopy was employed for in-situ, nondestructive analysis of pigments that remained on this artifact, and many mineral pigments (gypsum, red lead, carbon black, haematite, atacamite) and vegetable dyes (gamboges and indigo) were identified. It is noteworthy that this is the earliest example that gamboges were used as yellow dye in China at present. The results show that the Gaochang people had mastered skills proficiently, including the preparation, deployment and usage of pigment. The investigation of pigments could provide a basis for the restoration and conservation of relics, and more evidence for pigments trade business and cultural exchanges.     

高效液相色谱-二极管阵列检测器联用检测食品中的偶氮玉红

采用了高效液相色谱(HPLC)结合二极管阵列检测器(DAD),对食品中的偶氮玉红含量进行了定性、定量测定.结果表明,偶氮玉红的检出限为0.1mg/kg,加标回收率为95.4%,色谱峰分离效果好,具有良好的稳定性和重现性,方法切实可行.     

The comparison of laser surface designing and pigment printing methods for the product quality

Developing new designs by using the computer and transferring the designs that are obtained to textile surfaces will not only increase and facilitate the production in a more practical manner, but also help you create identical designs. This means serial manufacturing of the products at standard quality and increasing their added values. Moreover, creating textile designs using the laser will also contribute to the value of the product as far as the consumer is concerned because it will not cause any wearing off and deformation in the texture of the fabric unlike the other methods.In the system that has been designed, the laser beam at selected wavelength and intensity was directed onto a selected textile surface and a computer-controlled laser beam source was used to change the colour substances on the textile surface.Pigment printing is also used for designing in textile and apparel sector. In this method, designs are transferred to the fabric manually by using dyestuff.In this study, the denim fabric used for the surfacing trial was 100% cotton, with a weft count per centimeter of 20 and a warp count per centimeter of 27, with fabric weight of 458 g/m².The first step was to prepare 40 pieces of denim samples, half of which were prepared manually pigment printing and the other half by using the laser beam. After this, some test applications were done. The tensile strength, tensile extension and some fastness values of designed pieces with two methods were compared according to the international standards.