A detail procedure for extracting rutin and quercetin from Euonymus alatus(Thunb.) Sieb was developed with an obturated microwave-assisted extraction(MAE) device with pressure and temperature controlling units.The eff...A detail procedure for extracting rutin and quercetin from Euonymus alatus(Thunb.) Sieb was developed with an obturated microwave-assisted extraction(MAE) device with pressure and temperature controlling units.The effects of solvent concentration,ratio of solution to solid,radiation time and microwave power were discussed in orthogonal experiments.Compared with Soxhlet extraction and ultrasonic extraction,microwave extraction was a rapid method with a higher yield and less solvent consumption.The mechanism of the microwave-assisted extraction was studied by scanning electronic micrograph.In the case of microwave heating,the build-up pressure within the cells could exceed their capacity for expansion,and caused their rupture more rapidly than that in conventional extraction.展开更多
The blood glucose concentrations of volunteers from diabetes patients and healthy adults(all patients and volunteer who joined this experiment gave their consents) were measured by using a modified WQF-200 FTIR spectr...The blood glucose concentrations of volunteers from diabetes patients and healthy adults(all patients and volunteer who joined this experiment gave their consents) were measured by using a modified WQF-200 FTIR spectrometer with a newly designed ATR accessory. The results of this method are in good agreement with the clinical blood detection. The determination basis for this technique from the physiological point of view are also discussed based on the experimental results, which indicated that the glucose components measured by the FT-Mid-IR-ATR are from the secretions on the skin and glucose components within the body. The glucose components in both sources exhibit a linear relationship with blood glucose concentration within the body. All the results demonstrated that blood glucose concentration can be measured in a convenient, rapid and non-invasive way using ATR-FTIR spectroscopy, which is suitable for developing of a new technique to monitor the continuous variation of blood glucose concentration of diabetes patients in real time.展开更多
文摘A detail procedure for extracting rutin and quercetin from Euonymus alatus(Thunb.) Sieb was developed with an obturated microwave-assisted extraction(MAE) device with pressure and temperature controlling units.The effects of solvent concentration,ratio of solution to solid,radiation time and microwave power were discussed in orthogonal experiments.Compared with Soxhlet extraction and ultrasonic extraction,microwave extraction was a rapid method with a higher yield and less solvent consumption.The mechanism of the microwave-assisted extraction was studied by scanning electronic micrograph.In the case of microwave heating,the build-up pressure within the cells could exceed their capacity for expansion,and caused their rupture more rapidly than that in conventional extraction.
文摘The blood glucose concentrations of volunteers from diabetes patients and healthy adults(all patients and volunteer who joined this experiment gave their consents) were measured by using a modified WQF-200 FTIR spectrometer with a newly designed ATR accessory. The results of this method are in good agreement with the clinical blood detection. The determination basis for this technique from the physiological point of view are also discussed based on the experimental results, which indicated that the glucose components measured by the FT-Mid-IR-ATR are from the secretions on the skin and glucose components within the body. The glucose components in both sources exhibit a linear relationship with blood glucose concentration within the body. All the results demonstrated that blood glucose concentration can be measured in a convenient, rapid and non-invasive way using ATR-FTIR spectroscopy, which is suitable for developing of a new technique to monitor the continuous variation of blood glucose concentration of diabetes patients in real time.
