为了快速有效地检测出植物样品中的番茄黑环病毒(tomato black ring virus,TBRV),根据TBRV的保守序列设计RT-LAMP反应的特异引物,通过试验成功建立了TBRV的RT-LAMP特异性检测方法。该方法检测快速,约27 min即可检测到扩增曲线;特异性强...为了快速有效地检测出植物样品中的番茄黑环病毒(tomato black ring virus,TBRV),根据TBRV的保守序列设计RT-LAMP反应的特异引物,通过试验成功建立了TBRV的RT-LAMP特异性检测方法。该方法检测快速,约27 min即可检测到扩增曲线;特异性强,可有效区分同样侵染马铃薯的马铃薯A病毒(PVA)、马铃薯Y病毒(PVY)、番茄斑萎病毒(TSWV)及番茄环斑病毒(ToRSV);灵敏度高,比普通RT-PCR灵敏度至少高10倍;并可通过肉眼观察反应颜色的变化直接进行结果判断。该方法适用于TBRV的快速检测。展开更多
为建立番茄黑环病毒(Tomato black ring virus,TBRV)的液相芯片检测技术,对GenBank中的TBRV核苷酸序列进行分析,设计其特异性探针并用生物素标记。探针偶联荧光编码微球后与TBRV的RT-PCR产物进行杂交,用液相芯片检测仪检测荧光信号。结...为建立番茄黑环病毒(Tomato black ring virus,TBRV)的液相芯片检测技术,对GenBank中的TBRV核苷酸序列进行分析,设计其特异性探针并用生物素标记。探针偶联荧光编码微球后与TBRV的RT-PCR产物进行杂交,用液相芯片检测仪检测荧光信号。结果表明:建立的方法具有良好的特异性,能够有效区分侵染马铃薯的TBRV、马铃薯纺锤块茎类病毒(PSTVd)、马铃薯A病毒(PVA)及番茄斑萎病毒(TSWV);检测灵敏度约为1pg/μL总RNA,与常规RT-PCR灵敏度相当。实际样品检测结果表明该方法可用于TBRV的日常检测。展开更多
Hawking radiation of black ring solutions to 5-dimensional Einstein-Maxwell-dilaton theory is analyzed by use of the Parikh-Wilczek tunneling method. To get the correct tunneling amplitude and emission rate, we adopt ...Hawking radiation of black ring solutions to 5-dimensional Einstein-Maxwell-dilaton theory is analyzed by use of the Parikh-Wilczek tunneling method. To get the correct tunneling amplitude and emission rate, we adopt and develop the Angheben-Nadalini-Vanzo Zerbini covariant approach to cover the effects of rotation and electronic discharge all at once, and the effect of back reaction is also taken into account. This constitutes a unified approach to the tunneling problem. Provided the first law of thermodynamics for black rings holds, the emission rate is proportional to the exponential of the change of Bekenstein-Hawking entropy. Explicit calculation for black ring temperatures agrees exactly with the results obtained via the classical surface gravity method and the quasi-local formalism.展开更多
Precipitation in Heilongjiang Province of China increased slightly from 1960 to 2000. Adopting the method proposed by Arthur N. Samel, we separated monsoon rainband rain and calculated the initial and final date of mo...Precipitation in Heilongjiang Province of China increased slightly from 1960 to 2000. Adopting the method proposed by Arthur N. Samel, we separated monsoon rainband rain and calculated the initial and final date of monsoon rainband of each year and each station, For the period of 1960-2000, the change of annual precipitation in Heilongjiang Province, with an increasing trend of 2.229 mm per decade, is not significant; the duration and total monsoon rain decreased significantly, with a decreasing trend of -6.9 day per decade and -17,5 mm per decade separately. That change comes from early leaving date of summer monsoon rainband for the period of 1960- 1975 and later arriving date of summer monsoon rainband for the period of 1990-2000, The weakening of summer monsoon makes ils contribution to the annual precipitation decreased significantly, with a decreasing trend of 4.4 % per decade.展开更多
文摘为了快速有效地检测出植物样品中的番茄黑环病毒(tomato black ring virus,TBRV),根据TBRV的保守序列设计RT-LAMP反应的特异引物,通过试验成功建立了TBRV的RT-LAMP特异性检测方法。该方法检测快速,约27 min即可检测到扩增曲线;特异性强,可有效区分同样侵染马铃薯的马铃薯A病毒(PVA)、马铃薯Y病毒(PVY)、番茄斑萎病毒(TSWV)及番茄环斑病毒(ToRSV);灵敏度高,比普通RT-PCR灵敏度至少高10倍;并可通过肉眼观察反应颜色的变化直接进行结果判断。该方法适用于TBRV的快速检测。
文摘为建立番茄黑环病毒(Tomato black ring virus,TBRV)的液相芯片检测技术,对GenBank中的TBRV核苷酸序列进行分析,设计其特异性探针并用生物素标记。探针偶联荧光编码微球后与TBRV的RT-PCR产物进行杂交,用液相芯片检测仪检测荧光信号。结果表明:建立的方法具有良好的特异性,能够有效区分侵染马铃薯的TBRV、马铃薯纺锤块茎类病毒(PSTVd)、马铃薯A病毒(PVA)及番茄斑萎病毒(TSWV);检测灵敏度约为1pg/μL总RNA,与常规RT-PCR灵敏度相当。实际样品检测结果表明该方法可用于TBRV的日常检测。
基金The project supported by National Natural Science Foundation of China under Grant No. 90403014.Acknowledgments The author would like to thank X.H. Meng for discussions.
文摘Hawking radiation of black ring solutions to 5-dimensional Einstein-Maxwell-dilaton theory is analyzed by use of the Parikh-Wilczek tunneling method. To get the correct tunneling amplitude and emission rate, we adopt and develop the Angheben-Nadalini-Vanzo Zerbini covariant approach to cover the effects of rotation and electronic discharge all at once, and the effect of back reaction is also taken into account. This constitutes a unified approach to the tunneling problem. Provided the first law of thermodynamics for black rings holds, the emission rate is proportional to the exponential of the change of Bekenstein-Hawking entropy. Explicit calculation for black ring temperatures agrees exactly with the results obtained via the classical surface gravity method and the quasi-local formalism.
文摘Precipitation in Heilongjiang Province of China increased slightly from 1960 to 2000. Adopting the method proposed by Arthur N. Samel, we separated monsoon rainband rain and calculated the initial and final date of monsoon rainband of each year and each station, For the period of 1960-2000, the change of annual precipitation in Heilongjiang Province, with an increasing trend of 2.229 mm per decade, is not significant; the duration and total monsoon rain decreased significantly, with a decreasing trend of -6.9 day per decade and -17,5 mm per decade separately. That change comes from early leaving date of summer monsoon rainband for the period of 1960- 1975 and later arriving date of summer monsoon rainband for the period of 1990-2000, The weakening of summer monsoon makes ils contribution to the annual precipitation decreased significantly, with a decreasing trend of 4.4 % per decade.
