[Objectives]To study the protective effect and mechanism of n-butanol extract of Diploclisia glaucescens(B1.)Diels on rats with adjuvant arthritis.[Methods]A rat adjuvant arthritis(AA)model with similarities to a clin...[Objectives]To study the protective effect and mechanism of n-butanol extract of Diploclisia glaucescens(B1.)Diels on rats with adjuvant arthritis.[Methods]A rat adjuvant arthritis(AA)model with similarities to a clinical RA(rheumatoid arthritis)patient was used,and the model was made by injection of Complete Freund s adjuvant(CFA).Body mass and joint swelling degree were used as indicators,and the organ index was calculated and the synovial tissue of rats was examined under microscope to evaluate the protective effect of n-butanol extract on arthritis.The effects of n-butanol extract on TNF-α,IL-1βand PGE_(2)contents in rat serum were detected by ELISA kit.[Results]Arthritic rats experienced significant weight loss;the n-butanol extract reduced the joint swelling in rats.It exerted an effect on rat organs and reduced the contents of TNF-α,IL-1βand PGE_(2) in rat serum,and also reduced synovial inflammation in rats.[Conclusions]The n-butanol extract of D.glaucescens can protect rats with adjuvant arthritis by reducing the content of inflammatory factors.展开更多
[Objectives]To optimize the extraction process of polysaccharide in Embelia parviflora Wall.by response surface methodology,and to study the antioxidant activity in vitro of polysaccharide in E.parviflora,so as to pro...[Objectives]To optimize the extraction process of polysaccharide in Embelia parviflora Wall.by response surface methodology,and to study the antioxidant activity in vitro of polysaccharide in E.parviflora,so as to provide a basis for the further development and utilization of E.parviflora.[Methods]The solid-to-liquid ratio,extraction temperature,extraction time and extraction times were used as single factors to investigate the effects.On this basis,the response surface methodology(RSM)was used to optimize the extraction process of polysaccharide in E.parviflora.DPPH and ABTS free radicals were used to investigate the antioxidant capacity of polysaccharide in E.parviflora.[Results]The optimal solid-to-liquid ratio for extraction of polysaccharide from E.parviflora was 32∶1(mL/g),extraction temperature was 77℃,and extraction time was 36 min.The IC50 values of DPPH and ABTS were 0.04 and 0.03 mg/mL,respectively.[Conclusions]The optimized extraction process of polysaccharide in E.parviflora is stable,the extraction rate is high,and has strong antioxidant activity.It is expected to provide a reference for the industrial extraction of polysaccharide from E.parviflora.展开更多
[Objectives]To establish the quality control method of Dujieqing pills.[Methods]Tangerine peel and Panax notoginseng in Dujieqing pills were qualitatively identified by thin layer chromatography(TLC).The content of he...[Objectives]To establish the quality control method of Dujieqing pills.[Methods]Tangerine peel and Panax notoginseng in Dujieqing pills were qualitatively identified by thin layer chromatography(TLC).The content of hesperidin and ginsenoside Rb1 was determined by HPLC.The acetonitrile-aqueous solution was used as mobile phase for gradient elution,the detection wavelength was 203 nm,the flow rate was 1.0 mL/min,the column temperature was 25℃,and the injection volume was 10μL.[Results]Under TLC,tangerine peel and P.notoginseng had clear chromatographic spots,good separation effect,and strong specificity and negative samples showed no interference;there was a good linear relationship between hesperidin and ginsenoside Rb1 in the range of 0.838-8.38μg(R2=0.9994)and 0.44-4.4μg(R2=0.9994),respectively;the average recovery(n=9)was 98.90%(RSD=2.31%)and 98.31%(RSD=2.56%),respectively.[Conclusions]The established quality control method is simple,reproducible,accurate and reliable,and can be used for the quality control of Dujieqing pills.展开更多
[Objective]This study aimed to analyze the low-polar components and antioxidant activities of Vernonia divergens.[Method]After extraction,the relative contents of various components were calculated with peak area norm...[Objective]This study aimed to analyze the low-polar components and antioxidant activities of Vernonia divergens.[Method]After extraction,the relative contents of various components were calculated with peak area normalization method.In addition,V.divergens were extracted with n-hexane,ethyl acetate and n-butanol,respectively;DPPH scavenging capacity and reducing capacity of these three extracts were analyzed and compared with that of vitamin C.[Result]A total of 29 compounds were identified that accounted for 88.30%of the total amount of low-polar chemical components.The results indicated that n-butanol extract exhibited higher DPPH scavenging capacity and reducing capacity than ethyl acetate extract and n-hexane extract.[Conclusion]This study provided a theoretical basis for the development and utilization of V.divergens.展开更多
Heat-driven thermoacoustic refrigeration has drawn extensive concern in the past decades due to its advantages of high reliability and external heat-driven mechanism.In such a system,heat can be firstly converted into...Heat-driven thermoacoustic refrigeration has drawn extensive concern in the past decades due to its advantages of high reliability and external heat-driven mechanism.In such a system,heat can be firstly converted into acoustic power and then the acoustical power drives a refrigerator to generate cooling effect without any moving mechanical components.So far,most of researches on heat-driven thermoacoustic refrigeration have focused on cryo- genic application,such as natural gas liquefaction [1,2].In addition, heat-driven thermoacoustic refrigeration also plays important roles in recovering waste heat and provides an environment- friendly alternative to the current abso'rption chiller especially in the small-scale power range [3-7].However,two main obstacles to use the thermoacoustic technology in practice are its relatively low cooling capacity and low cooling efficiency.Either the two-loop configuration proposed by Luo et al.[5]or the configuration of a one-unit refrigerator driven by a three-unit engine brought forward by Kees [6],they both suffer from phase-shifting tube and mismatch between the thermoacoustic engine (TAE)and thermoacoustic refrigerator (TAR).展开更多
Sequencing-based genome-wide association studies(GWAS) have facilitated the identification of causal associations between genetic variants and traits in diverse species. However, it is cost-prohibitive for the majorit...Sequencing-based genome-wide association studies(GWAS) have facilitated the identification of causal associations between genetic variants and traits in diverse species. However, it is cost-prohibitive for the majority of research groups to sequence a large number of samples. Here, we carried out genotype imputation to increase the density of single nucleotide polymorphisms in a large-scale Swine F;population using a reference panel including 117 individuals, followed by a series of GWAS analyses. The imputation accuracies reached 0.89 and 0.86 for allelic concordance and correlation, respectively. A quantitative trait nucleotide(QTN) affecting the chest vertebrate was detected directly, while the investigation of another QTN affecting the residual glucose failed due to the presence of similar haplotypes carrying wild-type and mutant allelesin the reference panel used in this study. A high imputation accuracy was confirmed by Sanger sequencing technology for the most significant loci. Two candidate genes,CPNE5 and MYH3, affecting meat-related traits were proposed. Collectively, we illustrated four scenarios in imputation-based GWAS that may be encountered by researchers, and our results will provide an extensive reference for future genotype imputation-based GWAS analyses in the future.展开更多
基金Supported by Guangxi First-class Discipline Construction Project(2018xk0602019xk105)+2 种基金Open Project of Guangxi Key Laboratory of Zhuang and Yao Medicine(GXZYKF2019-2,GXZYKF2022-11)Research Project of Guangxi Key Laboratory of Pharmacodynamic Research of Traditional Chinese Medicine(19-050-39-A6)Program of Key Laboratory for Purification and Quality Analysis of TCM Extraction in Guangxi Universities(Gui Jiao Ke Yan[2014]No.6).
文摘[Objectives]To study the protective effect and mechanism of n-butanol extract of Diploclisia glaucescens(B1.)Diels on rats with adjuvant arthritis.[Methods]A rat adjuvant arthritis(AA)model with similarities to a clinical RA(rheumatoid arthritis)patient was used,and the model was made by injection of Complete Freund s adjuvant(CFA).Body mass and joint swelling degree were used as indicators,and the organ index was calculated and the synovial tissue of rats was examined under microscope to evaluate the protective effect of n-butanol extract on arthritis.The effects of n-butanol extract on TNF-α,IL-1βand PGE_(2)contents in rat serum were detected by ELISA kit.[Results]Arthritic rats experienced significant weight loss;the n-butanol extract reduced the joint swelling in rats.It exerted an effect on rat organs and reduced the contents of TNF-α,IL-1βand PGE_(2) in rat serum,and also reduced synovial inflammation in rats.[Conclusions]The n-butanol extract of D.glaucescens can protect rats with adjuvant arthritis by reducing the content of inflammatory factors.
基金National Natural Science Foundation of China(81660701)Natural Science Foundation of Guangxi(2016GXNSFAA380148)+1 种基金Scientific Research Innovation Program of Guangxi University of Chinese Medicine(YJSZ201712)Program of Key Laboratory for Purification and Quality Analysis of TCM Extraction in Guangxi Universities(Gui Jiao Ke Yan[2014]No.6).
文摘[Objectives]To optimize the extraction process of polysaccharide in Embelia parviflora Wall.by response surface methodology,and to study the antioxidant activity in vitro of polysaccharide in E.parviflora,so as to provide a basis for the further development and utilization of E.parviflora.[Methods]The solid-to-liquid ratio,extraction temperature,extraction time and extraction times were used as single factors to investigate the effects.On this basis,the response surface methodology(RSM)was used to optimize the extraction process of polysaccharide in E.parviflora.DPPH and ABTS free radicals were used to investigate the antioxidant capacity of polysaccharide in E.parviflora.[Results]The optimal solid-to-liquid ratio for extraction of polysaccharide from E.parviflora was 32∶1(mL/g),extraction temperature was 77℃,and extraction time was 36 min.The IC50 values of DPPH and ABTS were 0.04 and 0.03 mg/mL,respectively.[Conclusions]The optimized extraction process of polysaccharide in E.parviflora is stable,the extraction rate is high,and has strong antioxidant activity.It is expected to provide a reference for the industrial extraction of polysaccharide from E.parviflora.
基金Supported by Key R&D Project of Guangxi Science and Technology Department(GuiKeAB19110003).
文摘[Objectives]To establish the quality control method of Dujieqing pills.[Methods]Tangerine peel and Panax notoginseng in Dujieqing pills were qualitatively identified by thin layer chromatography(TLC).The content of hesperidin and ginsenoside Rb1 was determined by HPLC.The acetonitrile-aqueous solution was used as mobile phase for gradient elution,the detection wavelength was 203 nm,the flow rate was 1.0 mL/min,the column temperature was 25℃,and the injection volume was 10μL.[Results]Under TLC,tangerine peel and P.notoginseng had clear chromatographic spots,good separation effect,and strong specificity and negative samples showed no interference;there was a good linear relationship between hesperidin and ginsenoside Rb1 in the range of 0.838-8.38μg(R2=0.9994)and 0.44-4.4μg(R2=0.9994),respectively;the average recovery(n=9)was 98.90%(RSD=2.31%)and 98.31%(RSD=2.56%),respectively.[Conclusions]The established quality control method is simple,reproducible,accurate and reliable,and can be used for the quality control of Dujieqing pills.
基金Supported by of Natural Science Foundation of Guangxi Zhuang Autonomous Region(2014GXNSFBA118050)Project of State Key Laboratory of Chemical and Molecular Engineering(CMEMR2014-B)
文摘[Objective]This study aimed to analyze the low-polar components and antioxidant activities of Vernonia divergens.[Method]After extraction,the relative contents of various components were calculated with peak area normalization method.In addition,V.divergens were extracted with n-hexane,ethyl acetate and n-butanol,respectively;DPPH scavenging capacity and reducing capacity of these three extracts were analyzed and compared with that of vitamin C.[Result]A total of 29 compounds were identified that accounted for 88.30%of the total amount of low-polar chemical components.The results indicated that n-butanol extract exhibited higher DPPH scavenging capacity and reducing capacity than ethyl acetate extract and n-hexane extract.[Conclusion]This study provided a theoretical basis for the development and utilization of V.divergens.
基金financially supported by the National Key Research and Development Program of China (2016YFB0901403)the National Natural Science Foundation of China (51506211 and 51876214)+1 种基金the Foundation of Director of Technical Institute of Physics and Chemistry, CAS (2017-ZLM)CAS Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry (Youth Innovation Fund CRYOQN201701)
文摘Heat-driven thermoacoustic refrigeration has drawn extensive concern in the past decades due to its advantages of high reliability and external heat-driven mechanism.In such a system,heat can be firstly converted into acoustic power and then the acoustical power drives a refrigerator to generate cooling effect without any moving mechanical components.So far,most of researches on heat-driven thermoacoustic refrigeration have focused on cryo- genic application,such as natural gas liquefaction [1,2].In addition, heat-driven thermoacoustic refrigeration also plays important roles in recovering waste heat and provides an environment- friendly alternative to the current abso'rption chiller especially in the small-scale power range [3-7].However,two main obstacles to use the thermoacoustic technology in practice are its relatively low cooling capacity and low cooling efficiency.Either the two-loop configuration proposed by Luo et al.[5]or the configuration of a one-unit refrigerator driven by a three-unit engine brought forward by Kees [6],they both suffer from phase-shifting tube and mismatch between the thermoacoustic engine (TAE)and thermoacoustic refrigerator (TAR).
基金supported by the National Natural Science Foundation of China (31640046 and 31760656)the National Key Research and Development Program of China (2020YFA0509500)
文摘Sequencing-based genome-wide association studies(GWAS) have facilitated the identification of causal associations between genetic variants and traits in diverse species. However, it is cost-prohibitive for the majority of research groups to sequence a large number of samples. Here, we carried out genotype imputation to increase the density of single nucleotide polymorphisms in a large-scale Swine F;population using a reference panel including 117 individuals, followed by a series of GWAS analyses. The imputation accuracies reached 0.89 and 0.86 for allelic concordance and correlation, respectively. A quantitative trait nucleotide(QTN) affecting the chest vertebrate was detected directly, while the investigation of another QTN affecting the residual glucose failed due to the presence of similar haplotypes carrying wild-type and mutant allelesin the reference panel used in this study. A high imputation accuracy was confirmed by Sanger sequencing technology for the most significant loci. Two candidate genes,CPNE5 and MYH3, affecting meat-related traits were proposed. Collectively, we illustrated four scenarios in imputation-based GWAS that may be encountered by researchers, and our results will provide an extensive reference for future genotype imputation-based GWAS analyses in the future.
