In the present work,pulsed gas–liquid hybrid discharge plasma coupled with graphene/Cd S catalyst was evaluated to eliminate bisphenol A(BPA)in wastewater.The optimization of a series of process parameters was perfor...In the present work,pulsed gas–liquid hybrid discharge plasma coupled with graphene/Cd S catalyst was evaluated to eliminate bisphenol A(BPA)in wastewater.The optimization of a series of process parameters was performed in terms of BPA degradation performance.The experimental results demonstrated that nearly 90%of BPA(20 mg l^(-1))in the synthetic wastewater(p H=7.5,σ=10μS m^(-1))was degraded by the plasma catalytic system over 0.2 g l^(-1)graphene/Cd S at 19k V with a 4 l min^(-1)air flow rate and 10 mm electrode gap within 60 min.The BPA removal rate increased with increasing the discharge voltage and decreasing the initial BPA concentration or solution conductivity.Nevertheless,either too high or too low an air flow rate,electrode gap,catalyst dosage or initial solution p H would lead to a decrease in BPA degradation.Moreover,optical emission spectroscopy was used to gain information on short-lived reactive species formed from the pulsed gas–liquid hybrid discharge plasma system.The results indicated the existence of several highly oxidative free radicals such as·O and·OH.Finally,the activation pathway of O_(3)on the catalyst surface was analyzed by density functional theory.展开更多
AIM:To investigate the clinicopathological features of gastric carcinoma in southern China and disease trends changes over the last 18 years.METHODS:We designed a retrospective study in the Department of Gastrointesti...AIM:To investigate the clinicopathological features of gastric carcinoma in southern China and disease trends changes over the last 18 years.METHODS:We designed a retrospective study in the Department of Gastrointestinal Surgery,the first affiliated hospital,Sun Yat-sen University.A total of 2100adult patients with definitely diagnosed,histologically proven gastric carcinomas treated with radical gastrectomy from 1994 to 2013 were examined retrospectively.In all cases patient age,gender,tumor location,Borrmann type,histopathological type and grade,and pTNM stage were identified and recorded.The information was obtained from hospital records.The data were analyzed with Stata12.0 software.RESULTS:In this study,the mean age of patients was 57 years with a range from 19-89 years.A higher incidence was found in patients over 60 years of age.In the study population,67.38%of patients were male and 32.62%were female.Women had a higher disease incidence than men in patients less than 40 years of age(P<0.001).No obvious change of patient age and gender was observed in the last 18 years.The rates of disease by location were the following:antrum(44.57%),followed by fundus/body(24.95%)and cardia/gastroesophageal junction(23.00%).The mean tumor diameter was 5.57 cm,and advanced gross type BorrmannⅢwas most common.Most patients were at advanced stages when first diagnosed,and patients with early stage disease were relatively rare.More early stage patients were detected in recent years,especially after 2000(P<0.001).Gastric carcinoma has different features in young and old patients.The young patients had the following features:more frequently female,tumors in the antrum,larger tumor size,poorly differentiated carcinoma,high rate of metastasis to other sites and advanced stages(P<0.05).CONCLUSION:In southern China,gastric carcinoma was more frequent in old men and young women.Young and old patients should be treated differently for having different features.展开更多
Objective:To observe the clinical manifestations of allergic rhinitis mice and the expression changes of the eosinophils CCR3 and the granule protein rnRNA in the bone marrow,peripheral blood and nasal lavage fluid.Mc...Objective:To observe the clinical manifestations of allergic rhinitis mice and the expression changes of the eosinophils CCR3 and the granule protein rnRNA in the bone marrow,peripheral blood and nasal lavage fluid.Mctliods:Twenty-four BALB/c mice were randomly divided into the control group.PBS therapy group.siKNA therapy group and the CCR3 siRNA therapy group(n=6).Allergic rhinitis model were sensitized and stimulated by ovalbunfin,and CCR3 siKNA therapy group were administered with CCH3 transnasally before stimulated.The levels of the eosinophils CCR3.MBP.ECP and EPO in bone marrow,peripheral blood and nasal lavage fluid were detected by RT-PCR.Results:Compared to the control group and CCR3 siR.NA therapy group,the nasal mucosa of the PBS therapy group and siRNA therapy group developed epithalaxy.goblet cells hyperplasia,squamous epithelium metaplasia,epithelium necrosis,lamina propria and submucosa gland hyperplasia,vasodilatation,tissue edema,and the characterized eosinophil infiltration.RT-PCR indicated that the CCR3 rnRNA,MBP.ECP and EPC)expression in bone marrow,peripheral blood and nasal lavage fluid of the CCR3 siKNA therapy group was lower than the PBS therapy group and siR.NA therapy group(P<0.05).Conclusions:The RNA interference therapy to CCR3 by local administration pernasal can suppress the process of the development,migration and invasion of the allergic rhinitis eosinophil,thus can reduce the effect of eosinophils and then reduce the inflammation effect of the allergic rhinitis.It may be a new treatment for respiratory tract allergic inflammation.展开更多
Objective:Microvascular invasion(MVI)is an important risk factor for early recurrence after hepatectomy for hepatocellular carcinoma(HCC).However,it lacks the systemic evidence of the tissue sampling protocol for effi...Objective:Microvascular invasion(MVI)is an important risk factor for early recurrence after hepatectomy for hepatocellular carcinoma(HCC).However,it lacks the systemic evidence of the tissue sampling protocol for efficient MVI detection.This study aims to explore the relationship between the number of sampling sites(NuSS)crossing the tumor interface,the paracancerous parenchyma,and the positive rate of MVI.展开更多
Objective:To study the correlation of ultrasound vascularization index and flow index of thyroid cancer with tumor malignancy.Methods: A total of 140 patients with thyroid nodule who accepted surgical resection in our...Objective:To study the correlation of ultrasound vascularization index and flow index of thyroid cancer with tumor malignancy.Methods: A total of 140 patients with thyroid nodule who accepted surgical resection in our hospital between May 2013 and June 2016 were selected as the research subjects, the patients with malignant thyroid nodule were included in the malignant group of the research and patients with benign thyroid nodule were included in the benign group of research. Three-dimensional power Doppler ultrasonography was conducted before operation to determine vascularization index (VI), flow index (FI) and vascularization flow index (VFI);tumor tissues were collected after operation to detect the expression of angiogenesis as well as cell proliferation, apoptosis and invasion-related molecules.Results:VI, FI and VFI levels of tumor tissue of malignant group were significantly higher than those of benign group;VEGF, MK, Ang-2, IGF-Ⅱ, Bcl-2, Livin, Wip1, S100A4, TCF,β-catenin and SATB1 protein expression in tumor tissue of malignant group were significantly higher than those of benign group and positively correlated with VI, FI and VFI levels while CCNG2 and p27 protein expression were significantly lower than those of benign group and negatively correlated with VI, FI and VFI levels.Conclusion:Ultrasound vascularization index and flow index of thyroid cancer increase significantly and are closely related to the angiogenesis as well as cell proliferation, apoptosis and invasion.展开更多
Nitrate(NO3^(-))is known to be actively involved in the processes of mineralization and heavy metal transformation;however,it is unclear whether and how it affects the bioavailability of antimony(Sb)in paddy soils and...Nitrate(NO3^(-))is known to be actively involved in the processes of mineralization and heavy metal transformation;however,it is unclear whether and how it affects the bioavailability of antimony(Sb)in paddy soils and subsequent Sb accumulation in rice.Here,the effects of NO3^(-)on Sb transformation in soil-rice system were investigated with pot experiments over the entire growth period.Results demonstrated that NO3^(-)reduced Sb accumulation in brown rice by 15.6%compared to that in the control.After amendment with NO3^(-),the Sb content in rice plants increased initially and then gradually decreased(in roots by 46.1%).During the first 15 days,the soil p H increased,the oxidation of Sb(Ⅲ)and sulfides was promoted,but the reduction of iron oxide minerals was inhibited,resulting in the release of adsorbed and organic-bound Sb from soil.The microbial arsenite-oxidizing marker gene aox B played an important role in Sb(Ⅲ)oxidation.From days 15 to 45,after NO3^(-)was partially consumed,the soil p H decreased,and the reductive dissolution of Fe(Ⅲ)-bearing minerals was enhanced;consequently,iron oxide-bound Sb was transformed into adsorbed and dissolved Sb species.After day 45,NO3^(-)was completely reduced,Sb(V)was evidently reduced to Sb(Ⅲ),and green rust was generated gradually.Thus,the available Sb decreased due to its enhanced affinity for iron oxides.Moreover,NO3^(-)inhibited the reductive dissolution of iron minerals,which ultimately caused low Sb availability.Therefore,NO3^(-)can chemically and biologically reduce the Sb availability in paddy soils and alleviate Sb accumulation inrice.This study provides a potential strategy for decreasing Sb accumulation in rice in the Sb-contaminated sites.展开更多
There are many emergency risks in the process of natural gas hydrate(NGH)drilling.In order to ensure the safe and efficient exploitation of NGH,it is urgent to establish an intelligent judgment method for the risks in...There are many emergency risks in the process of natural gas hydrate(NGH)drilling.In order to ensure the safe and efficient exploitation of NGH,it is urgent to establish an intelligent judgment method for the risks in the process of NGH drilling.In this paper,the response relationship between monitoring parameters and risk categories of NGH while drilling is established.Based on fuzzy analytic hierarchy process(FAHP),the comprehensive weights of 10 risk monitoring parameters are obtained,including gas production,wellbore instability,hydrate ice barrier,drill string fracture,sticking,bit balling,drilling tool piercement,gas seepage,seabed subsidence and seabed landslide.Besides,the comprehensive judgment weight matrix is constructed,and the reasonable fluctuation range of monitoring parameters is formed.Thus,the intelligent judgment method of NGH drilling risk is established.The intelligent judgment and alarm of NGH drilling risks can be realized quickly and accurately by this method,namely,it can monitor the risks in the process of operation and guarantee the construction safety of NGH drilling.展开更多
Background and Aims:The redefinition of metabolic-as-sociated fatty liver disease(MAFLD)from nonalcoholic fat-ty liver disease(NAFLD)has caused a revolution in clinical practice,and the characteristics of patients wit...Background and Aims:The redefinition of metabolic-as-sociated fatty liver disease(MAFLD)from nonalcoholic fat-ty liver disease(NAFLD)has caused a revolution in clinical practice,and the characteristics of patients with steatosis but not MAFLD remain unclear.The aims were to compare the diagnosis rate of MAFLD in NAFLD using different steato-sis methods and explore the features of non-MAFLD-NAFLD and MAFLD-non-NAFLD.Methods:A cross-sectional study enrolling consecutive individuals was conducted at three medical centers in southern China from January 2015 to September 2020.Steatosis was evaluated by liver biopsy or magnetic resonance imaging-based proton density fat frac-tion(MRI-PDFF),ultrasound,controlled attenuation param-eter(CAP),and fatty liver index(FLI).Fibrosis was assessed by the NAFLD fibrosis score,transient elastography,or shear wave elastography.Results:The study enrolled 14,985 Chi-nese adults.The agreement of MAFLD and NAFLD diagnoses were 83%for FLI,95%for ultrasound,94%for both CAP and MRI-PDFF,and 95%for liver biopsy.The body mass index,blood pressure and lipid levels among non-MAFLD-NAFLD pa-tients were similar metabolic parameters(p>0.05 for all),but not the alanine aminotransferase and the proportion of pa-tients with insulin resistance,which were significantly higher in non-MAFLD-NAFLD with significant fibrosis.Conclusions:The new MAFLD definition ruled out 5-17%of NAFLD cases.NAFLD and MAFLD-NAFLD involved more severe metabolic abnormalities than MAFLD and MAFLD-non-NAFLD.Non-MAFLD-NAFLD patients with significant fibrosis had more se-vere liver injury and increased glycemic dysregulation within the normal range.Attention should be paid to its progression.展开更多
基金supported by the Open Fund for State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution(No.GHBK-2020-006)National Natural Science Foundation of China(No.21876070)。
文摘In the present work,pulsed gas–liquid hybrid discharge plasma coupled with graphene/Cd S catalyst was evaluated to eliminate bisphenol A(BPA)in wastewater.The optimization of a series of process parameters was performed in terms of BPA degradation performance.The experimental results demonstrated that nearly 90%of BPA(20 mg l^(-1))in the synthetic wastewater(p H=7.5,σ=10μS m^(-1))was degraded by the plasma catalytic system over 0.2 g l^(-1)graphene/Cd S at 19k V with a 4 l min^(-1)air flow rate and 10 mm electrode gap within 60 min.The BPA removal rate increased with increasing the discharge voltage and decreasing the initial BPA concentration or solution conductivity.Nevertheless,either too high or too low an air flow rate,electrode gap,catalyst dosage or initial solution p H would lead to a decrease in BPA degradation.Moreover,optical emission spectroscopy was used to gain information on short-lived reactive species formed from the pulsed gas–liquid hybrid discharge plasma system.The results indicated the existence of several highly oxidative free radicals such as·O and·OH.Finally,the activation pathway of O_(3)on the catalyst surface was analyzed by density functional theory.
文摘AIM:To investigate the clinicopathological features of gastric carcinoma in southern China and disease trends changes over the last 18 years.METHODS:We designed a retrospective study in the Department of Gastrointestinal Surgery,the first affiliated hospital,Sun Yat-sen University.A total of 2100adult patients with definitely diagnosed,histologically proven gastric carcinomas treated with radical gastrectomy from 1994 to 2013 were examined retrospectively.In all cases patient age,gender,tumor location,Borrmann type,histopathological type and grade,and pTNM stage were identified and recorded.The information was obtained from hospital records.The data were analyzed with Stata12.0 software.RESULTS:In this study,the mean age of patients was 57 years with a range from 19-89 years.A higher incidence was found in patients over 60 years of age.In the study population,67.38%of patients were male and 32.62%were female.Women had a higher disease incidence than men in patients less than 40 years of age(P<0.001).No obvious change of patient age and gender was observed in the last 18 years.The rates of disease by location were the following:antrum(44.57%),followed by fundus/body(24.95%)and cardia/gastroesophageal junction(23.00%).The mean tumor diameter was 5.57 cm,and advanced gross type BorrmannⅢwas most common.Most patients were at advanced stages when first diagnosed,and patients with early stage disease were relatively rare.More early stage patients were detected in recent years,especially after 2000(P<0.001).Gastric carcinoma has different features in young and old patients.The young patients had the following features:more frequently female,tumors in the antrum,larger tumor size,poorly differentiated carcinoma,high rate of metastasis to other sites and advanced stages(P<0.05).CONCLUSION:In southern China,gastric carcinoma was more frequent in old men and young women.Young and old patients should be treated differently for having different features.
基金supported by the National Natural Science Fund Project in China(grant No.:81060084)Jiangxi Provincial Natural Science Fund Project in China(grant No.:2010gzy0251)+1 种基金Jiangxi Provincial Health Department Project in China(grant No.:20131059)Jiangxi Provincial Department of Science and Technology Project in China(grant No.:20133BBG70071)
文摘Objective:To observe the clinical manifestations of allergic rhinitis mice and the expression changes of the eosinophils CCR3 and the granule protein rnRNA in the bone marrow,peripheral blood and nasal lavage fluid.Mctliods:Twenty-four BALB/c mice were randomly divided into the control group.PBS therapy group.siKNA therapy group and the CCR3 siRNA therapy group(n=6).Allergic rhinitis model were sensitized and stimulated by ovalbunfin,and CCR3 siKNA therapy group were administered with CCH3 transnasally before stimulated.The levels of the eosinophils CCR3.MBP.ECP and EPO in bone marrow,peripheral blood and nasal lavage fluid were detected by RT-PCR.Results:Compared to the control group and CCR3 siR.NA therapy group,the nasal mucosa of the PBS therapy group and siRNA therapy group developed epithalaxy.goblet cells hyperplasia,squamous epithelium metaplasia,epithelium necrosis,lamina propria and submucosa gland hyperplasia,vasodilatation,tissue edema,and the characterized eosinophil infiltration.RT-PCR indicated that the CCR3 rnRNA,MBP.ECP and EPC)expression in bone marrow,peripheral blood and nasal lavage fluid of the CCR3 siKNA therapy group was lower than the PBS therapy group and siR.NA therapy group(P<0.05).Conclusions:The RNA interference therapy to CCR3 by local administration pernasal can suppress the process of the development,migration and invasion of the allergic rhinitis eosinophil,thus can reduce the effect of eosinophils and then reduce the inflammation effect of the allergic rhinitis.It may be a new treatment for respiratory tract allergic inflammation.
文摘Objective:Microvascular invasion(MVI)is an important risk factor for early recurrence after hepatectomy for hepatocellular carcinoma(HCC).However,it lacks the systemic evidence of the tissue sampling protocol for efficient MVI detection.This study aims to explore the relationship between the number of sampling sites(NuSS)crossing the tumor interface,the paracancerous parenchyma,and the positive rate of MVI.
文摘Objective:To study the correlation of ultrasound vascularization index and flow index of thyroid cancer with tumor malignancy.Methods: A total of 140 patients with thyroid nodule who accepted surgical resection in our hospital between May 2013 and June 2016 were selected as the research subjects, the patients with malignant thyroid nodule were included in the malignant group of the research and patients with benign thyroid nodule were included in the benign group of research. Three-dimensional power Doppler ultrasonography was conducted before operation to determine vascularization index (VI), flow index (FI) and vascularization flow index (VFI);tumor tissues were collected after operation to detect the expression of angiogenesis as well as cell proliferation, apoptosis and invasion-related molecules.Results:VI, FI and VFI levels of tumor tissue of malignant group were significantly higher than those of benign group;VEGF, MK, Ang-2, IGF-Ⅱ, Bcl-2, Livin, Wip1, S100A4, TCF,β-catenin and SATB1 protein expression in tumor tissue of malignant group were significantly higher than those of benign group and positively correlated with VI, FI and VFI levels while CCNG2 and p27 protein expression were significantly lower than those of benign group and negatively correlated with VI, FI and VFI levels.Conclusion:Ultrasound vascularization index and flow index of thyroid cancer increase significantly and are closely related to the angiogenesis as well as cell proliferation, apoptosis and invasion.
基金the National Key Research and Development Program of China(Nos.2017YFD0801002,2018YFF0213403)GDAS’Project of Science and Technology Development(No.2020GDASYL-20200103076)China Postdoctoral Science Foundation(No.2019M652834)。
文摘Nitrate(NO3^(-))is known to be actively involved in the processes of mineralization and heavy metal transformation;however,it is unclear whether and how it affects the bioavailability of antimony(Sb)in paddy soils and subsequent Sb accumulation in rice.Here,the effects of NO3^(-)on Sb transformation in soil-rice system were investigated with pot experiments over the entire growth period.Results demonstrated that NO3^(-)reduced Sb accumulation in brown rice by 15.6%compared to that in the control.After amendment with NO3^(-),the Sb content in rice plants increased initially and then gradually decreased(in roots by 46.1%).During the first 15 days,the soil p H increased,the oxidation of Sb(Ⅲ)and sulfides was promoted,but the reduction of iron oxide minerals was inhibited,resulting in the release of adsorbed and organic-bound Sb from soil.The microbial arsenite-oxidizing marker gene aox B played an important role in Sb(Ⅲ)oxidation.From days 15 to 45,after NO3^(-)was partially consumed,the soil p H decreased,and the reductive dissolution of Fe(Ⅲ)-bearing minerals was enhanced;consequently,iron oxide-bound Sb was transformed into adsorbed and dissolved Sb species.After day 45,NO3^(-)was completely reduced,Sb(V)was evidently reduced to Sb(Ⅲ),and green rust was generated gradually.Thus,the available Sb decreased due to its enhanced affinity for iron oxides.Moreover,NO3^(-)inhibited the reductive dissolution of iron minerals,which ultimately caused low Sb availability.Therefore,NO3^(-)can chemically and biologically reduce the Sb availability in paddy soils and alleviate Sb accumulation inrice.This study provides a potential strategy for decreasing Sb accumulation in rice in the Sb-contaminated sites.
基金the National Key Research and Development Program(2019YFC0312300)the 111 Project(D21025)+3 种基金National Natural Science Foundation of China Item of China(U20B6005,51874252 and 5177041544)Scientific Research Starting Project of SWPU(2018QHZ007)Open Fund Project of State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation(PLN2021-02 and PLN2021-03)Found of Southern Marine Science and Engineering Guangdong Laboratory(Zhanjing)(ZJW-2019-03).
文摘There are many emergency risks in the process of natural gas hydrate(NGH)drilling.In order to ensure the safe and efficient exploitation of NGH,it is urgent to establish an intelligent judgment method for the risks in the process of NGH drilling.In this paper,the response relationship between monitoring parameters and risk categories of NGH while drilling is established.Based on fuzzy analytic hierarchy process(FAHP),the comprehensive weights of 10 risk monitoring parameters are obtained,including gas production,wellbore instability,hydrate ice barrier,drill string fracture,sticking,bit balling,drilling tool piercement,gas seepage,seabed subsidence and seabed landslide.Besides,the comprehensive judgment weight matrix is constructed,and the reasonable fluctuation range of monitoring parameters is formed.Thus,the intelligent judgment method of NGH drilling risk is established.The intelligent judgment and alarm of NGH drilling risks can be realized quickly and accurately by this method,namely,it can monitor the risks in the process of operation and guarantee the construction safety of NGH drilling.
基金National Natural Science Foundation of China(81870404,81670518,81170392)Guangdong Science and Technology Department(2014A020212118)+1 种基金Chinese Foundation for Hepatitis Prevention and Control(TQGB20140083)China postdoctoral science foundation(2020M683128).
文摘Background and Aims:The redefinition of metabolic-as-sociated fatty liver disease(MAFLD)from nonalcoholic fat-ty liver disease(NAFLD)has caused a revolution in clinical practice,and the characteristics of patients with steatosis but not MAFLD remain unclear.The aims were to compare the diagnosis rate of MAFLD in NAFLD using different steato-sis methods and explore the features of non-MAFLD-NAFLD and MAFLD-non-NAFLD.Methods:A cross-sectional study enrolling consecutive individuals was conducted at three medical centers in southern China from January 2015 to September 2020.Steatosis was evaluated by liver biopsy or magnetic resonance imaging-based proton density fat frac-tion(MRI-PDFF),ultrasound,controlled attenuation param-eter(CAP),and fatty liver index(FLI).Fibrosis was assessed by the NAFLD fibrosis score,transient elastography,or shear wave elastography.Results:The study enrolled 14,985 Chi-nese adults.The agreement of MAFLD and NAFLD diagnoses were 83%for FLI,95%for ultrasound,94%for both CAP and MRI-PDFF,and 95%for liver biopsy.The body mass index,blood pressure and lipid levels among non-MAFLD-NAFLD pa-tients were similar metabolic parameters(p>0.05 for all),but not the alanine aminotransferase and the proportion of pa-tients with insulin resistance,which were significantly higher in non-MAFLD-NAFLD with significant fibrosis.Conclusions:The new MAFLD definition ruled out 5-17%of NAFLD cases.NAFLD and MAFLD-NAFLD involved more severe metabolic abnormalities than MAFLD and MAFLD-non-NAFLD.Non-MAFLD-NAFLD patients with significant fibrosis had more se-vere liver injury and increased glycemic dysregulation within the normal range.Attention should be paid to its progression.
