食品安全是重要的民生问题,如何保障食品安全,守护"舌尖上的中国"一直是国家和人民关注的焦点问题。悬浮芯片技术是唯一被美国食品药品管理局(Food and Drug Administration, FDA)批准的生物芯片技术,具有准确、灵敏、高通量...食品安全是重要的民生问题,如何保障食品安全,守护"舌尖上的中国"一直是国家和人民关注的焦点问题。悬浮芯片技术是唯一被美国食品药品管理局(Food and Drug Administration, FDA)批准的生物芯片技术,具有准确、灵敏、高通量等优点,可以满足食品安全部门监管,食品行业自检需求,被越来越多的研究者应用于食品安全方面的检测。因此了解该技术的发展及应用对研究者有重要意义。本文主要对悬浮芯片技术的原理及组成、在食品安全检测中的应用进行了概述,阐述了近5年该技术在检测食源性微生物、农兽药残留、转基因食品和过敏原方面的应用,并对悬浮芯片技术进一步发展方向进行展望。展开更多
为获得一种快速特异灵敏的检测对虾黄头病的方法,本研究通过RT-PCR得到需要的DNA片段,选择两种高效的荧光编码微球,建立对虾黄头病(Yellow head disease,YHV)液相基因芯片检测体系并对病毒的GP116基因进行检测。通过对检测结果的分析,...为获得一种快速特异灵敏的检测对虾黄头病的方法,本研究通过RT-PCR得到需要的DNA片段,选择两种高效的荧光编码微球,建立对虾黄头病(Yellow head disease,YHV)液相基因芯片检测体系并对病毒的GP116基因进行检测。通过对检测结果的分析,从试验检测的灵敏度和特异性方面证明这种技术在对虾黄头病的检测中是可行的。展开更多
A gene (NANOC-D6D) encoding a desaturase that removes two hydrogen atoms from fatty acids at delta 6 position was isolated from a cDNA library of Nannochloropsis oculata (Droop) D. J. Hibberd (Eustigmatophyceae)...A gene (NANOC-D6D) encoding a desaturase that removes two hydrogen atoms from fatty acids at delta 6 position was isolated from a cDNA library of Nannochloropsis oculata (Droop) D. J. Hibberd (Eustigmatophyceae). The unicellular marine microalga N. oculata synthesizes rich long chain polyunsaturated fatty acids (LCPUFAs), including eicosapentaenoic acid (20:5n-3, EPA). The deduced protein contains 474 amino acids that fold into 4 trans-membrane domains. The neighbor-joining phylogenetic tree indicates that NANOC-D6D is phylogenetically close to the delta-6 fatty acid desaturase of marine microalgae such as Glossomastix chrysoplasta, Thalassiosira pseudonana, and Phaeodactylum tricornutum. The gene was expressed in Saccharomyces cerevisiae INVScl to verify the substrate specificity of NAN OC-D6D. Our results suggest that the recombinant NANOC-D6D simultaneously desaturates linoleic acid (LA) and a-linolenic acid (ALA).展开更多
文摘食品安全是重要的民生问题,如何保障食品安全,守护"舌尖上的中国"一直是国家和人民关注的焦点问题。悬浮芯片技术是唯一被美国食品药品管理局(Food and Drug Administration, FDA)批准的生物芯片技术,具有准确、灵敏、高通量等优点,可以满足食品安全部门监管,食品行业自检需求,被越来越多的研究者应用于食品安全方面的检测。因此了解该技术的发展及应用对研究者有重要意义。本文主要对悬浮芯片技术的原理及组成、在食品安全检测中的应用进行了概述,阐述了近5年该技术在检测食源性微生物、农兽药残留、转基因食品和过敏原方面的应用,并对悬浮芯片技术进一步发展方向进行展望。
文摘为获得一种快速特异灵敏的检测对虾黄头病的方法,本研究通过RT-PCR得到需要的DNA片段,选择两种高效的荧光编码微球,建立对虾黄头病(Yellow head disease,YHV)液相基因芯片检测体系并对病毒的GP116基因进行检测。通过对检测结果的分析,从试验检测的灵敏度和特异性方面证明这种技术在对虾黄头病的检测中是可行的。
基金Supported by the National Key Technology R&D Program in the 11th Five-Year Plan of China (No. 2006BAD09A03-2)the National High-tech Research and Development Program of China(863 Program) (No. 2007AA09Z427)
文摘A gene (NANOC-D6D) encoding a desaturase that removes two hydrogen atoms from fatty acids at delta 6 position was isolated from a cDNA library of Nannochloropsis oculata (Droop) D. J. Hibberd (Eustigmatophyceae). The unicellular marine microalga N. oculata synthesizes rich long chain polyunsaturated fatty acids (LCPUFAs), including eicosapentaenoic acid (20:5n-3, EPA). The deduced protein contains 474 amino acids that fold into 4 trans-membrane domains. The neighbor-joining phylogenetic tree indicates that NANOC-D6D is phylogenetically close to the delta-6 fatty acid desaturase of marine microalgae such as Glossomastix chrysoplasta, Thalassiosira pseudonana, and Phaeodactylum tricornutum. The gene was expressed in Saccharomyces cerevisiae INVScl to verify the substrate specificity of NAN OC-D6D. Our results suggest that the recombinant NANOC-D6D simultaneously desaturates linoleic acid (LA) and a-linolenic acid (ALA).