Two new diterpenoids,neoorthosiphonones B and C(1 and 2),and one known diterpenoid,were isolated from the aerial parts of Clerodendranthus spicatus.Their structures including absolute configurations were determined by...Two new diterpenoids,neoorthosiphonones B and C(1 and 2),and one known diterpenoid,were isolated from the aerial parts of Clerodendranthus spicatus.Their structures including absolute configurations were determined by comprehensive spectroscopic analyses and X-ray crystallographic methods.No compound was found to inhibit fibronectin production at the concentration of 20μM.展开更多
To further improvc the application of DNA fingerprinting technique in adulterated food identification and traceability, the paper briefly introduced the ap- plication of common DNA fingerprinting techniques, such as s...To further improvc the application of DNA fingerprinting technique in adulterated food identification and traceability, the paper briefly introduced the ap- plication of common DNA fingerprinting techniques, such as species-specific PCR, RAPD, AFLP, ISSR, SSR and SNP in adulterated food identification and traceability.展开更多
In this study, the event-specific real-time fluorescence quantitative PCR method established by Siehuan Academy of Agricultural Sciences was employed to detect the content of flanking fragment (specific fragment) in...In this study, the event-specific real-time fluorescence quantitative PCR method established by Siehuan Academy of Agricultural Sciences was employed to detect the content of flanking fragment (specific fragment) in samples containing 2% genetically modified maize event NK603. The uncertainty of detection results was evaluated based on various uncertainty sources, such as PCR amplification system, data analysis and micropipette. The results showed that A-type uncertainty ( uA ), B-type uncertainty ( uB ), combined standard uncertainty ( uC ) and expanded uncertainty ( U95 ) were 0. 000 8,0.1301,0. 001 and 0. 002, respectively; the final detection result was 1.9% ±0.002. Thus, the main uncertainty in detecting flanking fragment of genetically modified maize event NK603 with realtime fluorescence quantitative PCR method was derived from the random effect in the experimental process.展开更多
[ Objective ] The aim of this study was to develop a quantitative PCR detection method for genetically modified maize event NK603, so as to provide ba- sis for quantitative analysis of event NK603. [ Methods ] A quant...[ Objective ] The aim of this study was to develop a quantitative PCR detection method for genetically modified maize event NK603, so as to provide ba- sis for quantitative analysis of event NK603. [ Methods ] A quantitative PCR detection method for genetically modified maize event NK603 was developed using primers and Taqman probe designed according to the flanking sequence of event NK603, which was then adopted to detect the samples containing 2% NK603 stand- ard (with uncertain quantity of 10% ). [ Results ] The slope of standard curve ranged between -3.6 and -3.1, and the correlation coefficient was higher than 0. 99. The amplification efficiency of this method reached 100.2%, fallen between 90% and 110%. The detected quantity of the experimental sample was 1.9%, closer to the true quantity (2%). [ Conclusion] This quantitative PCR detection method for genetically modified maize event NK603 is very precise and can be a- dopted in routine testing analysis.展开更多
基金This study was financially supported by grants from Center of Cooperative Innovation for South China Medicine of Yunnan Province and National Science Fund for Distinguished Young Scholars(81525026).
文摘Two new diterpenoids,neoorthosiphonones B and C(1 and 2),and one known diterpenoid,were isolated from the aerial parts of Clerodendranthus spicatus.Their structures including absolute configurations were determined by comprehensive spectroscopic analyses and X-ray crystallographic methods.No compound was found to inhibit fibronectin production at the concentration of 20μM.
基金Supported by the Youth Foundation of Sichuan Academy of Agricultural Sciences(2009QNJJ-037,2010QNJJ-031)the Monitoring on Alien Biological Invasion(the Project of Ministry of Agriculture)
文摘To further improvc the application of DNA fingerprinting technique in adulterated food identification and traceability, the paper briefly introduced the ap- plication of common DNA fingerprinting techniques, such as species-specific PCR, RAPD, AFLP, ISSR, SSR and SNP in adulterated food identification and traceability.
基金Supported by Youth Fund of Sichuan Academy of Agricultural Sciences(2009QNJJ-037)
文摘In this study, the event-specific real-time fluorescence quantitative PCR method established by Siehuan Academy of Agricultural Sciences was employed to detect the content of flanking fragment (specific fragment) in samples containing 2% genetically modified maize event NK603. The uncertainty of detection results was evaluated based on various uncertainty sources, such as PCR amplification system, data analysis and micropipette. The results showed that A-type uncertainty ( uA ), B-type uncertainty ( uB ), combined standard uncertainty ( uC ) and expanded uncertainty ( U95 ) were 0. 000 8,0.1301,0. 001 and 0. 002, respectively; the final detection result was 1.9% ±0.002. Thus, the main uncertainty in detecting flanking fragment of genetically modified maize event NK603 with realtime fluorescence quantitative PCR method was derived from the random effect in the experimental process.
基金Supported by Youth Science and Technology Program of Sichuan Academy of Agricultural Science(2009QNJJ-037)Program for Monitoring Invasive Species of Ministry of Agriculture
文摘[ Objective ] The aim of this study was to develop a quantitative PCR detection method for genetically modified maize event NK603, so as to provide ba- sis for quantitative analysis of event NK603. [ Methods ] A quantitative PCR detection method for genetically modified maize event NK603 was developed using primers and Taqman probe designed according to the flanking sequence of event NK603, which was then adopted to detect the samples containing 2% NK603 stand- ard (with uncertain quantity of 10% ). [ Results ] The slope of standard curve ranged between -3.6 and -3.1, and the correlation coefficient was higher than 0. 99. The amplification efficiency of this method reached 100.2%, fallen between 90% and 110%. The detected quantity of the experimental sample was 1.9%, closer to the true quantity (2%). [ Conclusion] This quantitative PCR detection method for genetically modified maize event NK603 is very precise and can be a- dopted in routine testing analysis.