目的基于特定的荧光检测技术,探讨组织自发荧光在大鼠心肌缺血性损伤实验中的应用。方法本研究通过Kodak FX Pro活体成像技术检测大鼠心肌组织的自发荧光。通过荧光检测,比较正常大鼠和心肌缺血性损伤大鼠的心肌组织对应部位自发荧光的...目的基于特定的荧光检测技术,探讨组织自发荧光在大鼠心肌缺血性损伤实验中的应用。方法本研究通过Kodak FX Pro活体成像技术检测大鼠心肌组织的自发荧光。通过荧光检测,比较正常大鼠和心肌缺血性损伤大鼠的心肌组织对应部位自发荧光的变化,并进行定量分析。结果心肌缺血损伤后,损伤部位组织自发荧光信号明显增强,将荧光信号通过活体成像系统进行定量,与正常心肌组织比较差异有统计学意义。结论大鼠心肌组织在心肌缺血损伤后,心肌组织的自发荧光明显增强,为大鼠心肌缺血损伤模型的研究及其评价提供新的方法。有利于定位、定性、定量比较研究,可用于病理、生理、药理及作用机制等多方面研究。展开更多
Expression of insecticidal protein for transgenic Bacillus thuringiensis （Bt） cotton is unstable and related to nitrogen metabolism. The objective of this study was to investigate the relationship between leaf carbo...Expression of insecticidal protein for transgenic Bacillus thuringiensis （Bt） cotton is unstable and related to nitrogen metabolism. The objective of this study was to investigate the relationship between leaf carbon nitrogen ratio （C/N） and insecticidal efficacy of two Bt cotton cultivars. C/N ratio and Bt protein content were both measured at peak square period and peak boll period respectively under 5-7 d high temperature and different nitrogen fertilizer rates on the Yangzhou University Farm and the Ludong Cotton Farm, China. All plants were grown in field. The results showed that the C/N ratio enhanced slightly and the Bt protein content remained stable at peak square period, but significant increases for the C/N ratio and decreases markedly for the leaf Bt protein concentration were detected at the peak boll period. The similar patterns at the two growth periods were found for the leaf C/N ratio and Bt protein content by different N fertilizer treatments. When nitrogen rate was from 0 to 600 kg ha-l, the C/N ratio was reduced by 0.017 and 0.006 for Sikang 1 and Sikang 3 at peak square period, compared to the 1.350 to 1.143 reduction for Sikang 1 and Sikang 3 at peak boll period, respectively. Correspondingly, the leaf Bt protein contents were bolstered by 2.6-11.8 and 26.9-36.9% at the two different growth periods, respectively. The results suggested that enhanced C/N ratio by high temperature and nitrogen application may result in the reduction of inseetiocidal efficacy in Bt cotton, especially in peak boll period.展开更多
文摘目的基于特定的荧光检测技术,探讨组织自发荧光在大鼠心肌缺血性损伤实验中的应用。方法本研究通过Kodak FX Pro活体成像技术检测大鼠心肌组织的自发荧光。通过荧光检测,比较正常大鼠和心肌缺血性损伤大鼠的心肌组织对应部位自发荧光的变化,并进行定量分析。结果心肌缺血损伤后,损伤部位组织自发荧光信号明显增强,将荧光信号通过活体成像系统进行定量,与正常心肌组织比较差异有统计学意义。结论大鼠心肌组织在心肌缺血损伤后,心肌组织的自发荧光明显增强,为大鼠心肌缺血损伤模型的研究及其评价提供新的方法。有利于定位、定性、定量比较研究,可用于病理、生理、药理及作用机制等多方面研究。
基金supported by the National Natural Science Foundation of China(31171479)the Key Laboratory Foundation of Jiangsu Province,China(10KJA210057)+2 种基金the Priority Academic Program Development of Jiangsu Higher Education Institutions,China,the Doctoral Advisor Foundation of Education Department of China(20113250110001)the Project of National Agricultural Modern Industrial Technology System Post Experts,China(CARS-18-20)the Graduate Student Scientific Research Innovation Projects of Jiangsu Province,China(CXLX11_1019)
文摘Expression of insecticidal protein for transgenic Bacillus thuringiensis （Bt） cotton is unstable and related to nitrogen metabolism. The objective of this study was to investigate the relationship between leaf carbon nitrogen ratio （C/N） and insecticidal efficacy of two Bt cotton cultivars. C/N ratio and Bt protein content were both measured at peak square period and peak boll period respectively under 5-7 d high temperature and different nitrogen fertilizer rates on the Yangzhou University Farm and the Ludong Cotton Farm, China. All plants were grown in field. The results showed that the C/N ratio enhanced slightly and the Bt protein content remained stable at peak square period, but significant increases for the C/N ratio and decreases markedly for the leaf Bt protein concentration were detected at the peak boll period. The similar patterns at the two growth periods were found for the leaf C/N ratio and Bt protein content by different N fertilizer treatments. When nitrogen rate was from 0 to 600 kg ha-l, the C/N ratio was reduced by 0.017 and 0.006 for Sikang 1 and Sikang 3 at peak square period, compared to the 1.350 to 1.143 reduction for Sikang 1 and Sikang 3 at peak boll period, respectively. Correspondingly, the leaf Bt protein contents were bolstered by 2.6-11.8 and 26.9-36.9% at the two different growth periods, respectively. The results suggested that enhanced C/N ratio by high temperature and nitrogen application may result in the reduction of inseetiocidal efficacy in Bt cotton, especially in peak boll period.
