Identification of Colorants in Food by Surface-enhanced Raman Spectroscopy and Wavelet-based Reverse Search

使用金纳米粒子为增强因子的表面增强拉曼光谱技术,通过连续小波变换将拉曼光谱信号转化到小波空间(墨西哥帽小波作为小波基)。该步骤能够减轻信号中基线; 变化及随机噪音的影响并找到峰位置和最佳小波尺度系数。依据小波空间中的信息,对混合物光谱及标准谱光谱进行反向搜索得到反向搜索匹配系数(Revere; match quality,; RMQ),作为判断混合物中目标成分是否存在的依据。该算法可对混合物中的目标物质进行准确定性,并已成功应用于多种食品中色素鉴定。食品中色素的检出率; 达到99%,且结果稳健,其效果明显优于传统的命中质量系数法(Hit quality index,; HQI)。这证实了小波空间反向搜索方法是一种快速而准确的拉曼光谱定性算法。In this study, a gold nanocrystal colloid was used as the enhancement; factor for surfaceenhanced Raman scattering (SERS). Raman spectra were; transformed by continuous wavelet transform (CWT),and Mexican hat; wavelet were chosen as the wavelet basis. This procedure could be used; to alleviate the influence of baseline variations and random noise,and; find peak positions and the best scale wavelet coefficients of signal.; Reverse search method was proposed to compare the spectrum of an unknown; sample with a spectrum of standard using the information in wavelet; space. Reverse match quality (RMQ) could be obtained automatically to; determine whether a substance is present. It was used to identify; colorants in a variety of food successfully. The colorants could be; identified with 99 percent accuracy. It shows a better performance; compared with traditional hit quality index (HQI). The study confirmed; that the wavelet-based reverse search is feasible and accurate in; qualitative analysis.国家自然科学基金资助项目; 国家重大科学仪器设备开发专

p38MAPK induces apoptosis of glioma cell

目的　研究 p38MAPK基因转染大鼠胶质瘤细胞系C6后对其生物学特性的影响 .方法　利用脂质体介导法将p38MAPK基因导入大鼠胶质瘤细胞系 C6中 ,用免疫细胞化学染色检测其在细胞转染前后的表达情况 ,用 HE染色、流式细胞仪等方法研究其对细胞形态、粘着状况和生长周期的影响 .结果　转染 p CMV5 - p38MAPK质粒组 p38MAPK蛋白表达阳性 ,细胞形态发生变化 ,贴壁性降低 ,出现大量凋亡细胞 .结论　转染 p38MAPK基因可诱导胶质瘤细胞凋亡 【英文摘要】 AIM To study the effect of p38MAPK transfection on the biological characteristics of glioma cell C6. METHODS p38MAPK was transfected into glioma cell C6 by lipofectin. Expression of p38MAPK was detected by immunocytochemistry. HE staining and flow cytometry were adopted to measure the cell morphology, adhesion and cell cycle. RESULTS p38MAPK was expressed in transfected glioma cells, with cell biological characteristics changing and apoptotic cells emerging. CONCLUSION Apoptosis of glioma cell could be ...高等学校骨干教师计划资

Studies on Valuable and Rare Chinese Herbs Anoectochilu s roxburghii by DNA Fingerprintings Using RAPD

王其新 男, 1 9 7 3 年毕业于中山大学药用植物学专业。现任湛江市药品检验所中药室主任, 主任中药师。擅长生药学、中药鉴定学和植物化学,连续参加三版中国药典部分药品标准的起草和修订工作, 对草豆范的薄层色谱鉴别进行了系统的研究。所建立的薄层色谱法被中国药典采用。编著著作1 本, 获广东药学院科技进步二等奖1 项, 发表科学论文28 篇, 取得“ 壮骨口服液” 发明专利1 项。为了鉴别金线莲的品种，探索同属植物之间的亲缘关系及同种 植物不同产地的遗传变异，并制定正品金线莲的 DNA 指纹图谱，采用随机扩增多态 DNA(RAPD)技术对兰科开唇兰属植物花叶开唇兰 Anoectochilus roxburghii(Wal-l.).Lindl.、台湾开唇兰 A.formosanus Hay. 进行了鉴定，结果选 择的 7 个引物对 3 个品种 共扩增出 98 个位点，其中 3 个引物为高特异性引物。结论 RAPD 技术不仅能鉴别种间差 异，而且能揭示同种不同产地植物的遗传变异。厦门市卫生局医学科学技术进步基金科研资助项

p38MAPK induces apoptosis of glioma cell

目的　研究 p38MAPK基因转染大鼠胶质瘤细胞系C6后对其生物学特性的影响 .方法　利用脂质体介导法将p38MAPK基因导入大鼠胶质瘤细胞系 C6中 ,用免疫细胞化学染色检测其在细胞转染前后的表达情况 ,用 HE染色、流式细胞仪等方法研究其对细胞形态、粘着状况和生长周期的影响 .结果　转染 p CMV5 - p38MAPK质粒组 p38MAPK蛋白表达阳性 ,细胞形态发生变化 ,贴壁性降低 ,出现大量凋亡细胞 .结论　转染 p38MAPK基因可诱导胶质瘤细胞凋