Objective:A TLCS method was established for the determination of the content of Shenbei Beigua ointment,and the product quality of six samples from two formulations was evaluated.Methods:The determination method was t...Objective:A TLCS method was established for the determination of the content of Shenbei Beigua ointment,and the product quality of six samples from two formulations was evaluated.Methods:The determination method was thin-layer chromatography scanning(TLCS),using a developing solvent composed of ethyl acetate–methanol–strong ammonia water(17:2:1).The plates were heated at 105°C for 5 minutes,then sprayed with a mixture of dilute bismuth potassium iodide and 1%ferric chloride in ethanol(10:1),and scanned at a wavelength of 500 nm.Results:Peimine showed good linearity in the concentration range of 0.21–2.1μg with a correlation coefficient of r=0.9997,and Peiminine also exhibited good linearity in the same range with r=0.9995.The accuracy was≥95.0%,and the relative standard deviation(RSD)was≤5.0%(n=6).Conclusion:This method allows for the simultaneous determination of peimine and peiminine,providing a reliable reference for the quality control of the product.展开更多
[Objective]The research aimed to study the influence of climate warming on the agriculture in Shenbei New District of Shenyang in recent 38 years.[Method]Based on the temperature data in Shenbei New District of Shenya...[Objective]The research aimed to study the influence of climate warming on the agriculture in Shenbei New District of Shenyang in recent 38 years.[Method]Based on the temperature data in Shenbei New District of Shenyang during 1971-2008,by using the conventional statistical method,the variation trends of temperature and active accumulated temperature in Shenbei New District under the climate warming environment were analyzed,and the influence of climate warming on the agriculture was discussed.[Result]The annual average temperature,annual average maximum temperature,annual averageminimum temperature and≥0℃,≥10℃active accumulated temperatures which were passed stably in Shenbei New District in recent 38 years all showed the obvious rising trend.The climate tendency rates were respectively 0.4,0.3,0.1℃/10 a and 79.1,76.7℃·d/10 a.They all showed the declining trend in the coldest December,January and the rising trend in other months.The rising range of maximum temperature was bigger than that ofminimum temperature,and the rising range in summer was bigger than that in winter.The analysis result was different from that of many scholars.When the temperatures rose,and the heat resources increased,the agricultural cropping index improved,and the cultivated boundary of mid-late maturity variety moved northward.The industrialized agriculture developed quickly.Meanwhile,the risks of drought and flood disasters increased,and the insect pest aggravated.[Conclusion]The research provided the scientific basis for improving the cognizance about the influence of climate warming on the agricultural production and strengthening the strain capacity of local agricultural production adapting the climate variation.展开更多
文摘Objective:A TLCS method was established for the determination of the content of Shenbei Beigua ointment,and the product quality of six samples from two formulations was evaluated.Methods:The determination method was thin-layer chromatography scanning(TLCS),using a developing solvent composed of ethyl acetate–methanol–strong ammonia water(17:2:1).The plates were heated at 105°C for 5 minutes,then sprayed with a mixture of dilute bismuth potassium iodide and 1%ferric chloride in ethanol(10:1),and scanned at a wavelength of 500 nm.Results:Peimine showed good linearity in the concentration range of 0.21–2.1μg with a correlation coefficient of r=0.9997,and Peiminine also exhibited good linearity in the same range with r=0.9995.The accuracy was≥95.0%,and the relative standard deviation(RSD)was≤5.0%(n=6).Conclusion:This method allows for the simultaneous determination of peimine and peiminine,providing a reliable reference for the quality control of the product.
文摘[Objective]The research aimed to study the influence of climate warming on the agriculture in Shenbei New District of Shenyang in recent 38 years.[Method]Based on the temperature data in Shenbei New District of Shenyang during 1971-2008,by using the conventional statistical method,the variation trends of temperature and active accumulated temperature in Shenbei New District under the climate warming environment were analyzed,and the influence of climate warming on the agriculture was discussed.[Result]The annual average temperature,annual average maximum temperature,annual averageminimum temperature and≥0℃,≥10℃active accumulated temperatures which were passed stably in Shenbei New District in recent 38 years all showed the obvious rising trend.The climate tendency rates were respectively 0.4,0.3,0.1℃/10 a and 79.1,76.7℃·d/10 a.They all showed the declining trend in the coldest December,January and the rising trend in other months.The rising range of maximum temperature was bigger than that ofminimum temperature,and the rising range in summer was bigger than that in winter.The analysis result was different from that of many scholars.When the temperatures rose,and the heat resources increased,the agricultural cropping index improved,and the cultivated boundary of mid-late maturity variety moved northward.The industrialized agriculture developed quickly.Meanwhile,the risks of drought and flood disasters increased,and the insect pest aggravated.[Conclusion]The research provided the scientific basis for improving the cognizance about the influence of climate warming on the agricultural production and strengthening the strain capacity of local agricultural production adapting the climate variation.
