In recent years, the beer industry is a biological food industry that consumes a lot of water, and it has developed rapidly in China. The sewage discharged from the mass production of beer poses a huge threat to the e...In recent years, the beer industry is a biological food industry that consumes a lot of water, and it has developed rapidly in China. The sewage discharged from the mass production of beer poses a huge threat to the environment. In order to evaluate and better solve the possible environmental impacts of beer treatment engineering projects, a brewery project in Foshan City is taken as an example to investigate the water pollution generation links of the engineering process including surface water and groundwater. According to the relevant technical methods and standards, water pollution factors are screened, and concentration and discharge are monitored. Through comprehensive analysis, predictive evaluation is obtained. It is confirmed that the project meets the requirements of national laws and regulations and environmental protection standards.展开更多
Objective:To investigate the infection of patients in the ICU with extensively drug-resistant Acinetobacter baumannii(XDRAB)and analyse the effect of tigecycline therapy for XDRAB.Methods:Seventy-one patients admitted...Objective:To investigate the infection of patients in the ICU with extensively drug-resistant Acinetobacter baumannii(XDRAB)and analyse the effect of tigecycline therapy for XDRAB.Methods:Seventy-one patients admitted to the ICU with XDRAB infection from January 2013 to July 2017 were divided into the tigecycline group(combination therapy with 50 mg tigecycline and 0.1 g minocycline every 12 hours)or the control group(no tigecycline treatment).Patient data,including age,sex,history of malignant tumour,body temperature,APACHE Ⅱ score,ALT,AST,GGT,TB,ALB,TBIL,DBIL,IBIL,BUN,Cr,absolute neutrophil count,procalcitonin(PCT),site positive for XDRAB infection,length of stay,and prognosis,were collected and compared between the two groups.Binary logistic regression was used to analyse the prognostic risk factors for XDRAB.Results:A total of 61.6% of the patients infected with XDRAB had multiple sites of XDRAB colonization.The cure rate achieved in the tigecycline group was higher than that of the control group(70.7%vs 41.9%).Multivariate analysis showed that older age,a high level of PCT after treatment and the absence of tigecycline treatment were poor prognostic factors for XDRAB infection.Conclusion:Combination therapy with tigecycline and minocycline is effective for XDRAB infection and reduces the cost of treatment.Combined therapy with tigecycline is a predictor of good prognosis for patients infected with XDRAB,whereas older age and increased PCT levels after treatment are predictors of poor prognosis.展开更多
Cancer and impaired tissue wound healing with ageing are closely related to the quality of life of the elderly population.Given the increased incidence of cancer and the population ageing trend globally,it is very imp...Cancer and impaired tissue wound healing with ageing are closely related to the quality of life of the elderly population.Given the increased incidence of cancer and the population ageing trend globally,it is very important to explore how ageing impairs tissue wound healing and spontaneous cancer.In a murine model of DSS-induced acute colitis and AOM/DSS-induced colitis-associated cancer(CAC),we found ageing significantly decreases intestinal wound healing and simultaneous CAC initiation,although ageing does not affect the incidence of AOM-induced,sporadic non-inflammatory CRC.Mechanistically,reduced fibroblasts were observed in the colitis microenvironment of ageing mice.Through conditional lineage tracing,an important source of fibroblasts potentially derived from intestinal smooth muscle cells(ISMCs)was identified orchestrating intestinal wound healing and CAC initiation in young mice.However,the number of transformed fibroblasts from ISMCs significantly decreased in ageing mice,accompanied by decreased intestinal wound healing and decreased CAC initiation.ISMCs-fibroblasts transformation in young mice and reduction of this transformation in ageing mice were also confirmed by ex-vivo intestinal muscular layer culture experiments.We further found that activation of YAP/TAZ in ISMCs is required for the transformation of ISMCs into fibroblasts.Meanwhile,the reduction of YAP/TAZ activation in ISMCs during intestinal wound healing was observed in ageing mice.Conditional knockdown of YAP/TAZ in ISMCs of young mice results in reduced fibroblasts in the colitis microenvironment,decreased intestinal wound healing and decreased CAC initiation,similar to the phenotype of ageing mice.In addition,the data from intestine samples derived from inflammatory bowel disease(IBD)patients show that activation of YAP/TAZ also occurs in ISMCs from these patients.Collectively,our work reveals an important role of the ageing stromal microenvironment in intestinal wound healing and CAC initiation.Furthermore,our work also identified a potential source of fibroblasts involved in colitis and CAC.展开更多
Fever and rash illnesses(FRIs)are a series of common diseaseswith fever and rashes as clinicalmanifestations,most of which are caused by viral infection.The rashes of FRIs are generally nonspecific;therefore it is dif...Fever and rash illnesses(FRIs)are a series of common diseaseswith fever and rashes as clinicalmanifestations,most of which are caused by viral infection.The rashes of FRIs are generally nonspecific;therefore it is difficult to identify FRIassociated viruses solely based on clinical symptoms.To achieve rapid and accurate identification of FRI pathogens,a multiplex one-step real-time reverse transcription-polymerase chain reaction(RT-PCR)assay was developed and evaluated in this study.Primers and probes were selected for the detection of measles virus(MeV),rubella virus(RV),human enterovirus(EV),varicella-zoster virus(VZV),dengue virus(DENV),human parvovirus B19(B19),Epstein-Barr virus(EBV),and human herpes virus 6(HHV-6),which cover the most common pathogenic viruses of FRIs.Detection of the eight FRI-associated viruses,which was divided into two groups/tubes,was simultaneously performed under universal optimized reaction conditions in multiplex one-step real-time RT-PCR assay.The multiplex realtime RT-PCR showed high sensitivity and specificity in detecting the eight FRI-associated viruses.The limits of detection(LODs)for the eight viruses were in the range of 47–177 copies/reaction,and no cross reactions for the eight FRIassociated viruses were found in the multiplex assay.In addition,the results of the multiplex real-time RT-PCR assay were consistent with the results of a monoplex real-time RT-PCR assay and sequencing for clinical specimens obtained from FRI patients.With its advantages of high efficiency and rapid and accurate diagnosis,multiplex real-time RT-PCR was very feasible for the early diagnosis of FRI pathogenic viruses and would be of great help for the proper treatment,monitoring,and initiation of preventive measures for FRI cases.展开更多
What is already known about this topic?Coronavirus disease 2019(COVID-19)has become a global pandemic,while the profile of antibody response against the COVID-19 virus has not been well clarified.What is added by this...What is already known about this topic?Coronavirus disease 2019(COVID-19)has become a global pandemic,while the profile of antibody response against the COVID-19 virus has not been well clarified.What is added by this report?In this study,210 serum samples from 160 confirmed COVID-19 cases with different disease severities were recruited.The IgM,IgA,IgG,and neutralizing antibodies(NAb)against COVID-19 virus were determined.Our findings indicated that four antibodies could be detectable at low levels within 2 weeks of disease onset,then rapidly increasing and peaking from the 3^(rd) to 5^(th) Weeks.NAb decreased between 5^(th) and 9^(th) Weeks,and a higher IgM/IgA level was observed in the groups with mild/moderate severity within 2 weeks(p<0.05),while all 4 types of antibodies were higher in the group with severe/critical severity after 4 weeks(p<0.05).What are the implications for public health practice?Our study on the dynamics of serological antibody responses against COVID-19 virus among COVID-19 patients complements the recognition regarding the humoral immune response to COVID-19 virus infection.The findings will help in the interpretation of antibody detection results for COVID-19 patients and be beneficial for the evaluation of vaccination effects.展开更多
Nucleic acids with G4 elements play a role in the formation of aggregates involved in intracellular phase transitions.Our previous studies suggest that different forms of DNA could act as an accelerating template in C...Nucleic acids with G4 elements play a role in the formation of aggregates involved in intracellular phase transitions.Our previous studies suggest that different forms of DNA could act as an accelerating template in Cu/Zn superoxide dismutase(SOD1)aggregation.Here,we examined the regulation of fo rmation and cytotoxicity of the SOD1 aggregates by single-stranded 12-merdeoxynucleotide oligomers(dN)_(12)(N=A,T,G,C;ssDNAs)under acidic conditions.The ssDNAs can be divided into two groups based on their roles in SOD1 binding,exposure of hydrophobic clusters in SOD1,accelerated formation,morphology and cytotoxicity of SOD1 aggregates.G-quadruplexes convert SOD1 into fibrillar aggregates as a template,a fact which was observed for the first time in the nucleic acid regulation of protein aggregation.Moreover,the fibrillar or fibril-like SOD1 species with a G-quadruplex provided by(dG)_(12)were less toxic than the amorphous species with(dN)_(12)(N=A,T).This study not only indicates that both morphology and cytotoxicity of protein aggregates can be regulated by the protein-bound DNAs,but also help us understand roles of nucleic aid G-quadruplexes in the formation of aggregates and membrane less organelles involved in intracellular phase transitions.展开更多
China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current...China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current load test on the directly cooled conduction magnet.The research results were as follows:when the converter charges and discharges the magnet for energy storage,the hysteresis loss is the main part of power loss,and contributes significantly to temperature rise;reducing the current frequency at the side of direct current is conducive to restraining temperature rise.The optimizing factors of the cool-guide structure were analyzed based on the heat stability theory,and it was found that the heat transfer of its key part(at the top of the magnet)must be strengthened to reduce the axial temperature difference of the magnet.展开更多
基金Supported by Key Fields of Universities in Guangdong Province (Science and Technology Service for Rural Revitalization)(2021ZDZX4023)2021 Undergraduate Teaching Quality and Teaching Construction Project of Guangdong Province (Guangdong Education Gao Han [2021] 29)+1 种基金Zhaoqing University Quality Engineering and Teaching Reform Project (zlgc 201931)Zhaoqing University Students’Innovation and Entrepreneurship Training Program in 2022 (X 202210580130)。
文摘In recent years, the beer industry is a biological food industry that consumes a lot of water, and it has developed rapidly in China. The sewage discharged from the mass production of beer poses a huge threat to the environment. In order to evaluate and better solve the possible environmental impacts of beer treatment engineering projects, a brewery project in Foshan City is taken as an example to investigate the water pollution generation links of the engineering process including surface water and groundwater. According to the relevant technical methods and standards, water pollution factors are screened, and concentration and discharge are monitored. Through comprehensive analysis, predictive evaluation is obtained. It is confirmed that the project meets the requirements of national laws and regulations and environmental protection standards.
文摘Objective:To investigate the infection of patients in the ICU with extensively drug-resistant Acinetobacter baumannii(XDRAB)and analyse the effect of tigecycline therapy for XDRAB.Methods:Seventy-one patients admitted to the ICU with XDRAB infection from January 2013 to July 2017 were divided into the tigecycline group(combination therapy with 50 mg tigecycline and 0.1 g minocycline every 12 hours)or the control group(no tigecycline treatment).Patient data,including age,sex,history of malignant tumour,body temperature,APACHE Ⅱ score,ALT,AST,GGT,TB,ALB,TBIL,DBIL,IBIL,BUN,Cr,absolute neutrophil count,procalcitonin(PCT),site positive for XDRAB infection,length of stay,and prognosis,were collected and compared between the two groups.Binary logistic regression was used to analyse the prognostic risk factors for XDRAB.Results:A total of 61.6% of the patients infected with XDRAB had multiple sites of XDRAB colonization.The cure rate achieved in the tigecycline group was higher than that of the control group(70.7%vs 41.9%).Multivariate analysis showed that older age,a high level of PCT after treatment and the absence of tigecycline treatment were poor prognostic factors for XDRAB infection.Conclusion:Combination therapy with tigecycline and minocycline is effective for XDRAB infection and reduces the cost of treatment.Combined therapy with tigecycline is a predictor of good prognosis for patients infected with XDRAB,whereas older age and increased PCT levels after treatment are predictors of poor prognosis.
基金This study was supported by the National Natural Science Foundation of China Program grant(no.81972607,81772939)the National Key R&D Program of China grant(no.2022YFA1105602)1.3.5 project for disciplines of excellence,West China Hospital,Sichuan University(ZYGD20003).We thank Xinyue Hu for his contribution to the illustration in Fig.8.
文摘Cancer and impaired tissue wound healing with ageing are closely related to the quality of life of the elderly population.Given the increased incidence of cancer and the population ageing trend globally,it is very important to explore how ageing impairs tissue wound healing and spontaneous cancer.In a murine model of DSS-induced acute colitis and AOM/DSS-induced colitis-associated cancer(CAC),we found ageing significantly decreases intestinal wound healing and simultaneous CAC initiation,although ageing does not affect the incidence of AOM-induced,sporadic non-inflammatory CRC.Mechanistically,reduced fibroblasts were observed in the colitis microenvironment of ageing mice.Through conditional lineage tracing,an important source of fibroblasts potentially derived from intestinal smooth muscle cells(ISMCs)was identified orchestrating intestinal wound healing and CAC initiation in young mice.However,the number of transformed fibroblasts from ISMCs significantly decreased in ageing mice,accompanied by decreased intestinal wound healing and decreased CAC initiation.ISMCs-fibroblasts transformation in young mice and reduction of this transformation in ageing mice were also confirmed by ex-vivo intestinal muscular layer culture experiments.We further found that activation of YAP/TAZ in ISMCs is required for the transformation of ISMCs into fibroblasts.Meanwhile,the reduction of YAP/TAZ activation in ISMCs during intestinal wound healing was observed in ageing mice.Conditional knockdown of YAP/TAZ in ISMCs of young mice results in reduced fibroblasts in the colitis microenvironment,decreased intestinal wound healing and decreased CAC initiation,similar to the phenotype of ageing mice.In addition,the data from intestine samples derived from inflammatory bowel disease(IBD)patients show that activation of YAP/TAZ also occurs in ISMCs from these patients.Collectively,our work reveals an important role of the ageing stromal microenvironment in intestinal wound healing and CAC initiation.Furthermore,our work also identified a potential source of fibroblasts involved in colitis and CAC.
基金supported by the Key Technologies R&D Program of the National Ministry of Science[grant numbers 2018ZX10711001,2018ZX10713002,2018ZX10713001-003,and 2017ZX10104001-002].
文摘Fever and rash illnesses(FRIs)are a series of common diseaseswith fever and rashes as clinicalmanifestations,most of which are caused by viral infection.The rashes of FRIs are generally nonspecific;therefore it is difficult to identify FRIassociated viruses solely based on clinical symptoms.To achieve rapid and accurate identification of FRI pathogens,a multiplex one-step real-time reverse transcription-polymerase chain reaction(RT-PCR)assay was developed and evaluated in this study.Primers and probes were selected for the detection of measles virus(MeV),rubella virus(RV),human enterovirus(EV),varicella-zoster virus(VZV),dengue virus(DENV),human parvovirus B19(B19),Epstein-Barr virus(EBV),and human herpes virus 6(HHV-6),which cover the most common pathogenic viruses of FRIs.Detection of the eight FRI-associated viruses,which was divided into two groups/tubes,was simultaneously performed under universal optimized reaction conditions in multiplex one-step real-time RT-PCR assay.The multiplex realtime RT-PCR showed high sensitivity and specificity in detecting the eight FRI-associated viruses.The limits of detection(LODs)for the eight viruses were in the range of 47–177 copies/reaction,and no cross reactions for the eight FRIassociated viruses were found in the multiplex assay.In addition,the results of the multiplex real-time RT-PCR assay were consistent with the results of a monoplex real-time RT-PCR assay and sequencing for clinical specimens obtained from FRI patients.With its advantages of high efficiency and rapid and accurate diagnosis,multiplex real-time RT-PCR was very feasible for the early diagnosis of FRI pathogenic viruses and would be of great help for the proper treatment,monitoring,and initiation of preventive measures for FRI cases.
基金supported by the Key Technologies R&D Program of the National Ministry of Science(2018ZX10713002 and 2018ZX10713001-003).
文摘What is already known about this topic?Coronavirus disease 2019(COVID-19)has become a global pandemic,while the profile of antibody response against the COVID-19 virus has not been well clarified.What is added by this report?In this study,210 serum samples from 160 confirmed COVID-19 cases with different disease severities were recruited.The IgM,IgA,IgG,and neutralizing antibodies(NAb)against COVID-19 virus were determined.Our findings indicated that four antibodies could be detectable at low levels within 2 weeks of disease onset,then rapidly increasing and peaking from the 3^(rd) to 5^(th) Weeks.NAb decreased between 5^(th) and 9^(th) Weeks,and a higher IgM/IgA level was observed in the groups with mild/moderate severity within 2 weeks(p<0.05),while all 4 types of antibodies were higher in the group with severe/critical severity after 4 weeks(p<0.05).What are the implications for public health practice?Our study on the dynamics of serological antibody responses against COVID-19 virus among COVID-19 patients complements the recognition regarding the humoral immune response to COVID-19 virus infection.The findings will help in the interpretation of antibody detection results for COVID-19 patients and be beneficial for the evaluation of vaccination effects.
基金financially supported by the National Natural Science Foundation of China(Nos.21771073,22077046,21001047,21072074)the Fundamental Research Funds for the Central Universities(No.CCNU19TS052)。
文摘Nucleic acids with G4 elements play a role in the formation of aggregates involved in intracellular phase transitions.Our previous studies suggest that different forms of DNA could act as an accelerating template in Cu/Zn superoxide dismutase(SOD1)aggregation.Here,we examined the regulation of fo rmation and cytotoxicity of the SOD1 aggregates by single-stranded 12-merdeoxynucleotide oligomers(dN)_(12)(N=A,T,G,C;ssDNAs)under acidic conditions.The ssDNAs can be divided into two groups based on their roles in SOD1 binding,exposure of hydrophobic clusters in SOD1,accelerated formation,morphology and cytotoxicity of SOD1 aggregates.G-quadruplexes convert SOD1 into fibrillar aggregates as a template,a fact which was observed for the first time in the nucleic acid regulation of protein aggregation.Moreover,the fibrillar or fibril-like SOD1 species with a G-quadruplex provided by(dG)_(12)were less toxic than the amorphous species with(dN)_(12)(N=A,T).This study not only indicates that both morphology and cytotoxicity of protein aggregates can be regulated by the protein-bound DNAs,but also help us understand roles of nucleic aid G-quadruplexes in the formation of aggregates and membrane less organelles involved in intracellular phase transitions.
基金supported by the Hi-Tech Research and Development Program of China (No.2002AA306331-4)the National Natural Science Foundation of China (Grant No.51076013)the Research Fund for the Doctoral Program of Higher Education of China (No.200040487039).
文摘China’s first 35 kJ high temperature superconducting magnetic energy storage(SMES)system with an experiment equipment was depicted.The dynamic heat analysis of the magnet of the SMES was conducted through the current load test on the directly cooled conduction magnet.The research results were as follows:when the converter charges and discharges the magnet for energy storage,the hysteresis loss is the main part of power loss,and contributes significantly to temperature rise;reducing the current frequency at the side of direct current is conducive to restraining temperature rise.The optimizing factors of the cool-guide structure were analyzed based on the heat stability theory,and it was found that the heat transfer of its key part(at the top of the magnet)must be strengthened to reduce the axial temperature difference of the magnet.