摘要：迟缓爱德华氏菌(***)是最为严重的水产动物致病菌之一,准确、即时的检测手段是预防控制该菌传播的关键所在。通过量子点(QDs)标记***单克隆抗体(Ab),利用生物免疫传感器技术实现***的快速、特异性检测。结果显示,QDs-Ab的荧光通过加入氧化石墨烯(GO)产生淬灭,构建了捕获目标细菌的探针,GO最适淬灭浓度为60μg/L。细菌捕获探针中加入***后,能够检测到重新恢复强度的橙色荧光。针对***设计的生物免疫传感器的特异性,选取灿烂弧菌、溶藻胶弧菌、副溶血弧菌和嗜水气单胞菌作为对照,结果显示,对照组不能明显引起荧光强度的改变,而实验组却能显著提高荧光强度。本研究建立的基于荧光能量共振转移(FRET)的具有高灵敏度和特异性的生物传感器检测方法在细菌的早期诊断中有良好的应用潜质。

摘要：Vibrio parahaemolyticus is the leading causal agent of human acute gas- troenteritis. Real-time accurate detection means is the key to prevention and control of its spread. This study provided a novel detection strategy for realizing rapid and specific determination of V. parahaemolyticus by labeling its monoclonal antibody （Ab） with quantum dots （QDs）. The results showed that the fluorescence of these QDs-Ab bioconjugates was quenched by graphene oxide （GO） to produce a bacteri- um capture probe. And the optimal quenched concentration of GO was 60 ng/ml. When the bacterium capture probe was exposed to the target, green color fluores- cence was turned on by releasing the QDs-Ab due to the antibody antigen combi- nation. The detection limit of V. parahaemolyticus was 104 CFU/ml based on 3 times signal-to-noise ratio. The specificity of the FRET sensor towards V. para- haemolyticus was examined by comparing with controls such as V. splendidus, V. alginolyticus, Edwardsiella tarda and Aeromonas hydrophila with the same condition. The controls couldn＇t cause obvious fluorescence alteration, while the target resulted in significant fluorescence enhancement. This strategy could be further used as a universal method for any bacterial determination by changing the conjugated antibod- ies in early disease diagnosis. Therefore, the sensor has good potential to expand its application to the early diagnosis and determination of bacteria.

摘要：随着水产养殖业的发展,水产养殖动物病害频发,目前亟需一种灵敏、快速、准确的病原微生物检测方法。该研究采用生物免疫荧光技术,通过不同颜色的量子点(QDs)标记副溶血弧菌抗体(Ab1)和迟缓爱德华氏菌抗体(Ab2)来实现多种病原菌的同时检测。结果显示,QDs-Ab的荧光通过加入氧化石墨烯(GO)产生淬灭,构建了捕获目标细菌的探针,氧化石墨烯最适淬灭浓度为60 ng/ml。细菌捕获探针中加入副溶血弧菌或迟缓爱德华氏菌后,能够检测到重新恢复强度的绿色或橙色荧光。副溶血弧菌和迟缓爱德华氏菌的检出限分别为1.5×10~4 CFU/ml和2.1×10~4 CFU/ml。针对副溶血弧菌和迟缓爱德华氏菌设计的生物免疫传感器的特异性,选取灿烂弧菌、溶藻胶弧菌和嗜水气单胞菌作为对照,结果显示,对照组不能明显引起荧光强度的改变,而试验组却能显著提高荧光强度。该研究建立的基于荧光能量共振转移(FRET)的具有高灵敏度和特异性的生物传感器检测方法在细菌的早期诊断中有良好的应用潜质。

摘要：目的制备曲美他嗪双层渗透泵控释片并优化其处方。方法以含药层聚氧乙烯用量、助推层氯化钠用量、包衣增重为考察因素,药物的8 h累积释放度和0～8 h释放曲线的线性相关系数为考察指标,应用星点设计-效应面法对处方进行优化并验证。结果最优处方为含药层聚氧乙烯的用量86 mg,助推层氯化钠用量为25 mg,包衣增重7%。其释放曲线在0～8 h零级释放特征显著,8 h累积释放量达到89%以上,实测值与预测值无明显差异。结论采用星点设计-效应面法成功得到曲美他嗪双层渗透泵控释片的处方优化模型,实现了处方优化。