Pyrethroid is widely used in developing countries and is a potential threat to human health.So putting forward an effective pyrethroid cleaning method is of vital importance.Clearance of fenpropathrin,cypermethrin and...Pyrethroid is widely used in developing countries and is a potential threat to human health.So putting forward an effective pyrethroid cleaning method is of vital importance.Clearance of fenpropathrin,cypermethrin and deltamethrin in cabbage by using ultrasonic treatment accompanied with different baking soda concentrations were investigated in this study.The results of response surface methodology showed that the maximum clearance rate was 70.61% for fenpropathrin under the optimal power,treated time,treated temperature and baking soda concentration,which were 260.02 W,10 min,20.15◦C and 0.014 g/mL,respectively.Similarly,the maximum removal efficiency was 73.72% for cypermethrin under 240 W,13.84 min,19.53℃ and 0.014 g/mL,and 92.15%for deltamethrin under 238.99 W,12.42 min,25℃ and 0.013 g/mL.The clearance rate of pyrethroid by this method was significant higher(P<0.05)than traditional cleaning methods(bathing and running water washing).The contents of the compositions such as vitamin C,total soluble sugar,protein and dietary fiber,texture and sensory evaluation of cabbage were not found obvious changes after the ultrasonic treatment combined with baking soda(P>0.05).Results showed that ultrasonic treatment combined with baking soda was an effective way to eliminate the fenpropathrin,cypermethrin and deltamethrin in cabbage without influencing cabbage quality.展开更多
Hepatocellular carcinoma(HCC)ranks among the most prevalent cancers worldwide and represents a leading contributor to cancer-associated mortality.Curative strategies primarily include liver resection(LR)and liver tran...Hepatocellular carcinoma(HCC)ranks among the most prevalent cancers worldwide and represents a leading contributor to cancer-associated mortality.Curative strategies primarily include liver resection(LR)and liver transplantation(LT).However,in China,the fiveyear recurrence rate after curative-intent treatment is as high as 50%-70%,while overall survival(OS)remains below 15%,posing a significant clinical challenge.展开更多
Nonphotosynthetic vegetation(NPV)including dormant vegetation and plant residues plays important roles in wind erosion control.However,the effects of NPV on wind erosion have not been fully considered at regional scal...Nonphotosynthetic vegetation(NPV)including dormant vegetation and plant residues plays important roles in wind erosion control.However,the effects of NPV on wind erosion have not been fully considered at regional scales,which led to large uncertainties in wind erosion simulations.With the development of NPV remote sensing technology and drag partition schemes,an integrated wind erosion model with nonphotosynthetic vegetation monitoring has become possible.Here,we integrated a wind erosion model and a NPV monitoring method and simulated wind erosion processes in the desert steppe(DS)of Inner Mongolia and the Mu Us Sandy Land(MU).After we nested NPV monitoring in the wind erosion model,an integrated model was developed,by which total vegetation cover and the corresponding frontal area were derived.Then,the aerodynamic parameters of the roughness elements were extracted using the Raupach drag partition scheme.The integrated model provided more accurate simulated wind erosion results compared to the original model,and the relative error of the simulated results by the integrated model was reduced by 61%.NPV played an important role in wind erosion control,especially in non-growing seasons and in semi-arid regions.Finally,we discussed the potential uncertainties in wind erosion simulations induced by vegetation parameters.Our study provides a new insight into wind erosion simulations and the simulation results provide support for land conservation.展开更多
Quercetin-3-O-sambubioside[Quercetin-3-O-β-D-xylopyranosyl(1→2)-β-D-glucopyranoside]was separated and purified by semi-preparative high-speed counter-current chromatography(HSCCC)with a twophase-solvent system comp...Quercetin-3-O-sambubioside[Quercetin-3-O-β-D-xylopyranosyl(1→2)-β-D-glucopyranoside]was separated and purified by semi-preparative high-speed counter-current chromatography(HSCCC)with a twophase-solvent system composed of ethyl acetate-nbutanol-water(4∶1∶5,v/v)from the leaves of Nelumbo nucifera(Lotus).A total of 5.0 mg of the targeted compound with a purity of 98.6%as determined by high performance liquid chromatography(HPLC)was obtained from 100 mg of the crude extract cleaned up by AB-8 macroporous resin in a one-step separation.Quercetin-3-O-sambubioside was a novel flavonoid glycoside from the leaves of Nelumbo nucifera,and its chemical structure was identified by means of ESI-MS,1D NMR and 2D NMR.展开更多
Lipophilic(lycopene,β-carotene)and hydrophilic(caffeic acid,p-coumaric acid)phytochemicals were mixed in molar mass at different concentrations/ratios to explore the antioxidant interactions on H_(2)O_(2)-treated H9c...Lipophilic(lycopene,β-carotene)and hydrophilic(caffeic acid,p-coumaric acid)phytochemicals were mixed in molar mass at different concentrations/ratios to explore the antioxidant interactions on H_(2)O_(2)-treated H9c2 cells.Reactive oxide species(ROS),expression of antioxidant enzymes,and oxidation products were analyzed and evaluated by synergistic rate(SR)and combination index(CI).At constant concentrations,antioxidant interactions were influenced by ratios.Group contained more hydrophilic compounds(eg.,p-coumaric acid:β-carotene=9:1)showed antioxidant synergism(SR=22.33±1.23,SR>0)at 3.0μM,while groups that contained more lipophilic compounds(eg.,p-coumaric acid:β-carotene=1:9)showed antioxidant antagonism(SR=-11.68±1.25,SR<0)at 3.0μM.Antioxidant interactions were also influenced by concentrations.From results,ROS generation of group(p-coumaric acid:β-carotene=1:9)changed from synergism(SR=12.27±2.34,SR>0)to antagonism(SR=-11.68±1.25,SR<0)as their total concentrations increased from 1.5μM to 3.0μM.Therefore,this study discussed the possible mechanism of ratio and concentration on the antioxidant interaction among hydrophilic and lipophilic phytochemicals.It also suggested that proper concentrations/ratios of hydrophilic and lipophilic phytochemicals should be considered in diet and formulation of functional foods.展开更多
基金the financial and technology support of State Key Lab of Food Science and Technology of Nanchang University(SKLF-ZZA-201910).
文摘Pyrethroid is widely used in developing countries and is a potential threat to human health.So putting forward an effective pyrethroid cleaning method is of vital importance.Clearance of fenpropathrin,cypermethrin and deltamethrin in cabbage by using ultrasonic treatment accompanied with different baking soda concentrations were investigated in this study.The results of response surface methodology showed that the maximum clearance rate was 70.61% for fenpropathrin under the optimal power,treated time,treated temperature and baking soda concentration,which were 260.02 W,10 min,20.15◦C and 0.014 g/mL,respectively.Similarly,the maximum removal efficiency was 73.72% for cypermethrin under 240 W,13.84 min,19.53℃ and 0.014 g/mL,and 92.15%for deltamethrin under 238.99 W,12.42 min,25℃ and 0.013 g/mL.The clearance rate of pyrethroid by this method was significant higher(P<0.05)than traditional cleaning methods(bathing and running water washing).The contents of the compositions such as vitamin C,total soluble sugar,protein and dietary fiber,texture and sensory evaluation of cabbage were not found obvious changes after the ultrasonic treatment combined with baking soda(P>0.05).Results showed that ultrasonic treatment combined with baking soda was an effective way to eliminate the fenpropathrin,cypermethrin and deltamethrin in cabbage without influencing cabbage quality.
文摘Hepatocellular carcinoma(HCC)ranks among the most prevalent cancers worldwide and represents a leading contributor to cancer-associated mortality.Curative strategies primarily include liver resection(LR)and liver transplantation(LT).However,in China,the fiveyear recurrence rate after curative-intent treatment is as high as 50%-70%,while overall survival(OS)remains below 15%,posing a significant clinical challenge.
基金financially supported by the National Natural Science Foundation of China(Grant No.42271016).
文摘Nonphotosynthetic vegetation(NPV)including dormant vegetation and plant residues plays important roles in wind erosion control.However,the effects of NPV on wind erosion have not been fully considered at regional scales,which led to large uncertainties in wind erosion simulations.With the development of NPV remote sensing technology and drag partition schemes,an integrated wind erosion model with nonphotosynthetic vegetation monitoring has become possible.Here,we integrated a wind erosion model and a NPV monitoring method and simulated wind erosion processes in the desert steppe(DS)of Inner Mongolia and the Mu Us Sandy Land(MU).After we nested NPV monitoring in the wind erosion model,an integrated model was developed,by which total vegetation cover and the corresponding frontal area were derived.Then,the aerodynamic parameters of the roughness elements were extracted using the Raupach drag partition scheme.The integrated model provided more accurate simulated wind erosion results compared to the original model,and the relative error of the simulated results by the integrated model was reduced by 61%.NPV played an important role in wind erosion control,especially in non-growing seasons and in semi-arid regions.Finally,we discussed the potential uncertainties in wind erosion simulations induced by vegetation parameters.Our study provides a new insight into wind erosion simulations and the simulation results provide support for land conservation.
基金funded by the Natural Science Foundation of Jiangxi Province(2006GY0066)the Research Project of Education Office of Jiangxi Province(20030058)the Program for Yangtse Scholars and Innovative Research Team in University(IRT0540).
文摘Quercetin-3-O-sambubioside[Quercetin-3-O-β-D-xylopyranosyl(1→2)-β-D-glucopyranoside]was separated and purified by semi-preparative high-speed counter-current chromatography(HSCCC)with a twophase-solvent system composed of ethyl acetate-nbutanol-water(4∶1∶5,v/v)from the leaves of Nelumbo nucifera(Lotus).A total of 5.0 mg of the targeted compound with a purity of 98.6%as determined by high performance liquid chromatography(HPLC)was obtained from 100 mg of the crude extract cleaned up by AB-8 macroporous resin in a one-step separation.Quercetin-3-O-sambubioside was a novel flavonoid glycoside from the leaves of Nelumbo nucifera,and its chemical structure was identified by means of ESI-MS,1D NMR and 2D NMR.
基金funded by the National Natural Science Funds of China(Grant 31972970 and 21964012)found by State Key Laboratory of Food Science and Technology,Nanchang University(Project No.SKLF-ZZB-202119).
文摘Lipophilic(lycopene,β-carotene)and hydrophilic(caffeic acid,p-coumaric acid)phytochemicals were mixed in molar mass at different concentrations/ratios to explore the antioxidant interactions on H_(2)O_(2)-treated H9c2 cells.Reactive oxide species(ROS),expression of antioxidant enzymes,and oxidation products were analyzed and evaluated by synergistic rate(SR)and combination index(CI).At constant concentrations,antioxidant interactions were influenced by ratios.Group contained more hydrophilic compounds(eg.,p-coumaric acid:β-carotene=9:1)showed antioxidant synergism(SR=22.33±1.23,SR>0)at 3.0μM,while groups that contained more lipophilic compounds(eg.,p-coumaric acid:β-carotene=1:9)showed antioxidant antagonism(SR=-11.68±1.25,SR<0)at 3.0μM.Antioxidant interactions were also influenced by concentrations.From results,ROS generation of group(p-coumaric acid:β-carotene=1:9)changed from synergism(SR=12.27±2.34,SR>0)to antagonism(SR=-11.68±1.25,SR<0)as their total concentrations increased from 1.5μM to 3.0μM.Therefore,this study discussed the possible mechanism of ratio and concentration on the antioxidant interaction among hydrophilic and lipophilic phytochemicals.It also suggested that proper concentrations/ratios of hydrophilic and lipophilic phytochemicals should be considered in diet and formulation of functional foods.
