Chromosomal localization of a novel retinoic acid induced geneRA28 and protein distribution of its encoded protein

GeneRA28 is a retinoic acid induced novel gene isolated in our laboratory previously. All-trans retinoic acid (ATRA) was used to induce lung adenocarcinoma cell line GLC-82, andRA28 was obtained by subtractive hybridization. Green fluorescent protein (GFP) has emerged as a unique tool for examining introcellular phenomena in living cells. GFP possesses an intrinsic fluorescence at 488 nm that does not require other co-factors. In this report, an eukaryotic expression plasmid pEGFP-C1-RA28 was constructed and transfected with parental cell line GLC-82 to analyze protein expression and its distribution in living cells. Moreover, radiation hybrid (RH) technique was used to localizeRA28 to the chromosome. The results show that geneRA28 is mapped to the chromosome 19q13.1 region, its encoded protein is distributed on cell membrane. All the results further demonstrate that GFP and RH techniques are accurate, fast, repetitive, and will be powerful methods for investigating the gene and protein localization.     

Polymerization of fluorescent analogue of plant actinin vitro andin vivo

Maize pollen actin has been labeled with Oregon Green 488 iodoacetamide. A yield of 3 mg fluorescent actin analogue has been obtained from 10 mg of maize pollen actin, which is 99% in purity and the dye/protein ratio is 72%. In the presence of Mg²⁺ and K⁺, the fluorescent actin analogue polymerized into filamentsin vitro. Green fluorescent filaments were observed when the fluorescent actin was introduced into living plant cells by microinjection, indicating that the fluorescent actin analogue functions similarly to the native actin.     

聚硅氧烷基荧光材料

聚硅氧烷基荧光材料作为一类性能独特的有机硅材料,在荧光探针、生物传感、力学传感、发光二极管等领域具有广阔的应用前景.基于近十几年来国内外聚硅氧烷基荧光材料的相关报道,文中结合本课题组的研究成果,综述了线型、超支化和交联3类结构的聚硅氧烷基荧光材料的研究进展,总结了各类荧光材料的合成、应用及发光机理,探讨了聚硅氧烷在荧光...     

一种基于最优小波包基的电泳荧光信号去噪方法

针对现有电泳荧光信号去噪处理方法的不足,提出一种基于最优小波包基的信号去噪方法.该方法采用Shannon熵准则选择最优小波包基,选取Penalized阈值,用量化后的系数重构得到去噪后的信号.仿真实验表明:基于最优小波包基的电泳荧光信号去噪方法在使信噪比得到提高的同时,电泳荧光信号的峰值误差也进一步减小.     

去除土霉素药渣中残留有效成分的方法

研究了去除土霉素药渣中残留有效成分的方法,探讨了盐酸、氧化钙、甲醇及加热温度对去除土霉素药渣中残留有效成分的影响因素,确定了最佳条件.药渣经2.0 mol/L盐酸浸泡,95 ℃水浴加热搅拌,放置至室温,加甲醇,搅拌、抽滤,滤渣加蒸馏水混匀,用CaO调pH为5.0,95 ℃水浴搅拌,过滤,滤渣95 ℃烘干.处理后的土霉素滤渣的效价平均结果为430.0 U/g,消除率可达96.9%.     

重组痘苗病毒对不同哺乳动物细胞株的感染效率及EGFP表达水平研究

研究重组痘苗病毒对不同哺乳动物细胞的感染效率及表达水平，可为痘苗病毒表达系统宿主细胞的正确选择提供依据．本研究利用重组绿色荧光蛋白基因的痘苗病毒WR—EGFP同时感染不同的哺乳动物细胞株，利用流式细胞仪检测EGFP的表达强度．共使用20种哺乳动物细胞株，其中10种人类组织细胞，2种猴组织细胞。8种小鼠组织细胞．结果表明，重组痘苗病毒wR-EGFP对鼠细胞系BHK21和人细胞系A-549的感染效率和表达效率最佳；整体看，痘苗病毒对多数灵长类动物细胞的感染效率和表达效率优于鼠细胞；对贴壁细胞的感染效率和表达效率明显优于悬浮细胞；但没有特别的组织偏嗜性。     

单剂量口灌呋喃唑酮在草鱼体内消除及组织残留研究

按60 mg/kg的剂量给草鱼灌服呋喃唑酮,用高效液相色谱法检测用药后不同时间的血浆、肝脏、肾脏及肌肉中药物浓度,然后用MCPKP药代动力学软件处理药时数据,对药物在草鱼体内消除及组织残留进行研究.结果表明单剂量口灌呋喃唑酮在草鱼血液中主要药动学参数为 AUC 3.756 9 μg*h/mL, Cmax 0.517 6 μg/mL, t1/2α1.524 9 h,t1/2β22.863 2 h,Tpeak 2.229 6 h,k10 1.015 8 h-1,k12 0.124 9 h-1,k210.0654 7 h-1;给药后72 h肌肉和血浆中检测不到药物,7 d后肝、肾中药物消除.     

增强型绿色荧光蛋白基因真核表达载体的构建

构建增强型绿色荧光蛋白(enhanced green fluorescent protein,EGFP)基因的真核表达载体pCDNA3．1( )-EGFP,转染至培养的Hela细胞中成功表达,并发出绿色荧光,证明EGFP一种良好的报告基因和筛选标记．     

马尾松PmAOX基因克隆与不同逆境胁迫表达分析

揭示马尾松（Pinus massoniana）抗氰呼吸途径的交替氧化酶（alternative oxidase,AOX）基因的功能。     

芹菜中噻嗪酮农药残留检测的不确定度分析

针对蔬菜中噻嗪酮残留的检测,采用高效液相色谱分析,研究了该方法的不确定度来源和结果的扩展不确定度。结果表明,农残提取、检测、外标曲线和分析仪器对噻嗪酮残留结果产生的相对不确定度分量分别为0.000 6、0.005 9、0.002 1和0.011 9,合成标准不确定度为0.013 5,噻嗪酮农残的扩展不确定度为0.013μg·g-1(k=2),噻嗪酮残留量可以表示为(0.487±0.013)μg·g-1。4个不确定度分量中分析仪器对结果的影响最大,样品检测的影响其次。高效液相色谱法检测蔬菜中噻嗪酮残留量的结果可靠。