The occurrence of extreme rainfall events and associated flooding has been enhanced due to climate changes, and is thought to influence the flux of total dissolved iron（TDI） in rivers considerably. Since TDI is a co...The occurrence of extreme rainfall events and associated flooding has been enhanced due to climate changes, and is thought to influence the flux of total dissolved iron（TDI） in rivers considerably. Since TDI is a controlling factor in primary productivity in marine ecosystems, alteration of riverine TDI input to the ocean may lead to climate change via its effect on biological productivity. During an extreme rainfall event that arose in northeastern China in 2013, water samples were collected in the midstream of the Heilongjiang River to analyze the concentration and species of TDI as well as other basic parameters. The speciation of TDI was surveyed by filtration and ultrafiltration methods.Compared with data monitored from 2007 to 2012, the concentration of TDI increased significantly during this event, with an average concentration of 1.11 mg/L, and the estimated TDI flux reached 1.2 × 10^5 tons, equaling the average annual TDI flux level.Species analysis revealed that low-molecular-weight complexed iron was the dominant species, and the impulse of TDI flux could probably be attributed to the hydrological connection to riparian wetlands and iron-rich terrestrial runoff. Moreover, dissolved organic matter played a key role in the flux, species and bioavailability of TDI. In addition,there is a possibility that the rising TDI flux could further influence the transport and cycling of nutrients and related ecological processes in the river, estuary coupled with the coastal ecosystems, which merits closer attention in the future.展开更多
Heat dissipation and thermal switches are vital for adaptive cooling and extending the lifespan of electronic devices and batteries. In this work, we conducted high-throughput investigations on the thermal transport o...Heat dissipation and thermal switches are vital for adaptive cooling and extending the lifespan of electronic devices and batteries. In this work, we conducted high-throughput investigations on the thermal transport of 24 experimentally realized two-dimensional(2D) materials and their potential as thermal switches, leveraging machine-learning-assisted strain engineering and phonon transport simulations. We identified several highperformance thermal switches with ratios exceeding 2, with germanene(Ge) achieving an ultrahigh ratio of up to9.64 within the reversible deformation range. The underlying mechanism is strain-induced bond softening, which sensitively affects anharmonicity represented by three-and four-phonon scattering. The widespread occurrence of four-phonon scattering was confirmed in the thermal transport of 2D materials. Opposite switching trends were discovered, with 2D transition metal dichalcogenide materials showing negative responses to tensile strain while buckled 2D elemental materials showed positive responses. We further proposed a screening descriptor based on strain-induced changes in the Gr¨uneisen parameter for efficiently identifying new high-performance thermal switch materials. This work establishes a paradigm for thermal energy control in 2D materials through strain engineering, which may be experimentally realized in the future via bending, substrate mismatch, and related approaches, thereby laying a robust foundation for further developments and applications.展开更多
This editorial comments on the review by Da Silva et al,published in the World Journal of Clinical Oncology which focuses on the molecular perspectives of lung cancer.With the rapid development of molecular technology...This editorial comments on the review by Da Silva et al,published in the World Journal of Clinical Oncology which focuses on the molecular perspectives of lung cancer.With the rapid development of molecular technology,new diagnostic methods are constantly emerging,including liquid biopsy,the identification of gene mutations,and the monitoring biomarkers,thus providing precise in-formation with which to identify the occurrence and development of lung cancer.Biomarkers,such as circulating tumor cells,circulating tumor DNA,and cir-culating RNA can provide helpful information for clinical application.Common types of genetic mutations and immune checkpoints include epidermal growth factor receptor,anaplastic lymphoma kinase,c-ROS proto-oncogene 1,progra-mmed death-1 and cytotoxic T-lymphocyte-associated protein.According to specific biomarkers,targeted therapy and immunotherapy can improve survival outcomes based on the types of gene mutation and immune checkpoints.The application of molecular approaches can facilitate our ability to control the progression of disease and select appropriate therapeutic strategies for patients with lung cancer.展开更多
BACKGROUND The current surgical treatments for bile duct stones(BDSs)demonstrate suboptimal efficacy,warranting further exploration of superior therapies or improvement of existing surgical protocols.AIM To assess the...BACKGROUND The current surgical treatments for bile duct stones(BDSs)demonstrate suboptimal efficacy,warranting further exploration of superior therapies or improvement of existing surgical protocols.AIM To assess the therapeutic efficacy and safety profiles of endoscopic retrograde cholangiopancreatography(ERCP)vs common bile duct exploration(CBDE)in BDS treatment.METHODS This study enrolled 103 consecutive patients with BDSs treated at the First People’s Hospital of Changde from January 2024 to January 2025,with 53 patients undergoing ERCP(ERCP group)and 50 receiving conventional CBDE(CBDE group).Comprehensive comparative analyses were conducted across multiple parameters,including clinical efficacy,surgical success rate,safety(bile leakage incidence,surgical site infection,acute pancreatitis,and acute cholangitis),postoperative biochemical markers(total bilirubin and serum amylase),surgeryrelated metrics(stone removal time,procedure duration,intraoperative blood loss,and hospitalization time),and postoperative recovery indicators(time to intestinal recovery,jaundice resolution,biliary drainage removal,and postoperative activity recovery).RESULTS The ERCP group demonstrated markedly superior overall efficacy than the CBDE group,with similar surgical success rates and comparable stone removal durations.Importantly,patients undergoing ERCP experienced fewer complications overall,required less operative time,had minimal intraoperative blood loss,and needed shorter hospitalization periods.Recovery parameters such as bowel function recovery,jaundice resolution,biliary stent removal,and normal activity resumption,were significantly improved in the ERCP group.Both groups demonstrated substantial postoperative reductions in total bilirubin and amylase,with no significant intergroup differences.CONCLUSION ERCP demonstrates effectiveness and safety in managing BDSs,thereby providing notable clinical benefits that support its broader implementation in medical practice.展开更多
BACKGROUND Cirrhosis-related upper gastrointestinal bleeding(UGIB)poses a fatal risk,and endoscopic ligation as a sole intervention shows inadequate effectiveness.AIM To evaluate the therapeutic efficacy of endoscopic...BACKGROUND Cirrhosis-related upper gastrointestinal bleeding(UGIB)poses a fatal risk,and endoscopic ligation as a sole intervention shows inadequate effectiveness.AIM To evaluate the therapeutic efficacy of endoscopic variceal ligation(EVL)plus pro-pranolol vs EVL monotherapy in patients with cirrhosis complicated with acute UGIB and identify predictors for clinical outcomes.METHODS This study enrolled 99 consecutive patients with cirrhosis presenting with acute UGIB between January 2024 and January 2025.Participants were allocated to either the control group(n=49)receiving EVL alone or(2)the research group(n=50)receiving EVL plus propranolol.Primary outcomes included treatment efficacy,venous blood flow[portal venous flow(PVF)/splenic venous flow(SVF)],and postoperative outcomes(hemostasis time,length of hospital stay,and rebleeding rates).Univariate and multivariate regression analyses were conducted to determine independent predictors of treatment response.RESULTS Compared with the control group,the research group demonstrated significantly better outcomes,including higher overall treatment efficacy,greater reductions in PVF and SVF,shorter hemostasis time and hospital stay,and lower rebleeding rates.Univariate analysis demonstrated significant associations between treatment efficacy and age,cirrhosis duration,Child-Pugh grade,bleeding duration,and treatment approach in patients with cirrhosis complicated with acute UGIB.Multivariate logistic regression identified three independent risk factors for poor outcomes,namely,advanced age(>55 years),prolonged cirrhosis duration(≥4 years),and delayed bleeding intervention(>24 hours).CONCLUSION The EVL plus propranolol regimen demonstrates significant efficacy in treating UGIB in cirrhosis,outperforming EVL alone in improving hemodynamics(PVF/SVF),shortening hemostasis and hospitalization duration,and reducing rebleeding rates.Moreover,advanced age,prolonged disease duration,and longer bleeding times are independent risk factors for poor therapeutic outcomes.展开更多
Severe lithium dendrite growth and elevated thermal runaway risks pose significant hurdles for fast-charging lithium metal batteries(LMBs)This study reports a polydopamine-functionalized hydroxyapatite/aramid(PDA@HA)h...Severe lithium dendrite growth and elevated thermal runaway risks pose significant hurdles for fast-charging lithium metal batteries(LMBs)This study reports a polydopamine-functionalized hydroxyapatite/aramid(PDA@HA)hybrid nanofibers separator to synchronously improve th fast-charging LMB's stability and safety.(1)The separator's surface,enriched with lithiophilic carbonyl and hydroxyl groups,accelerates Li~+ion desolvation,while electrophilic imine groups impede anion movement.This dual mechanism optimizes the Li^(+)-ion flux distribution on th anode,mitigating dendrite formation.(2)The polar PDA modification layer fosters the development of a Li_(3)N/LiF-rich solid electrolyt interface,further enhancing Li anode stability.Consequently,Li//Li symmetric cells with PDA@HA separators exhibit extended cycle life in L plating/stripping tests:5000 h at 1 mA cm^(-2)and 700 h at 20 mA cm^(-2),respectively,outperforming PP separators(80 h and 8 h).In LiFePO_(4)(LFP,^(2.1)mg cm^(-2))//Li full cell evaluation,the PDA@HA separator enables stable operation for 11,000 cycles at 18.2C with 87%capacity retention,significantly outperforming existing fast-charging LMB counterparts in literature.At a high LFP loading of 15.5 mg cm^(-2),the cel maintains 137.6 mAh g^(-1)(2.13 mAh cm^(-2))over 250 cycles at 3C,achieving 98%capacity retention.Moreover,the PDA@HA separato increases threshold temperature for thermal runaway and reduces the exothermic rate,intensifying the battery's thermal safety.This research underscores the importance of functional separator design in improving Li metal anode reversibility,fast-charging performance,and therma safety of LMBs.展开更多
基金supported by the National Nature Science Foundation of China (No. 41271499)the Major Science and Technology Program for Water Pollution Control and Treatment (No. 2012ZX07201004)
文摘The occurrence of extreme rainfall events and associated flooding has been enhanced due to climate changes, and is thought to influence the flux of total dissolved iron（TDI） in rivers considerably. Since TDI is a controlling factor in primary productivity in marine ecosystems, alteration of riverine TDI input to the ocean may lead to climate change via its effect on biological productivity. During an extreme rainfall event that arose in northeastern China in 2013, water samples were collected in the midstream of the Heilongjiang River to analyze the concentration and species of TDI as well as other basic parameters. The speciation of TDI was surveyed by filtration and ultrafiltration methods.Compared with data monitored from 2007 to 2012, the concentration of TDI increased significantly during this event, with an average concentration of 1.11 mg/L, and the estimated TDI flux reached 1.2 × 10^5 tons, equaling the average annual TDI flux level.Species analysis revealed that low-molecular-weight complexed iron was the dominant species, and the impulse of TDI flux could probably be attributed to the hydrological connection to riparian wetlands and iron-rich terrestrial runoff. Moreover, dissolved organic matter played a key role in the flux, species and bioavailability of TDI. In addition,there is a possibility that the rising TDI flux could further influence the transport and cycling of nutrients and related ecological processes in the river, estuary coupled with the coastal ecosystems, which merits closer attention in the future.
基金supported bythe Science and Technology Commission of Shanghai Municipality (Grant No.24CL2901702)The numerical calculations were performed at the Supercomputer Center (Project No.2024-Cb-0042)Institute for Solid State Physics,the University of Tokyo。
文摘Heat dissipation and thermal switches are vital for adaptive cooling and extending the lifespan of electronic devices and batteries. In this work, we conducted high-throughput investigations on the thermal transport of 24 experimentally realized two-dimensional(2D) materials and their potential as thermal switches, leveraging machine-learning-assisted strain engineering and phonon transport simulations. We identified several highperformance thermal switches with ratios exceeding 2, with germanene(Ge) achieving an ultrahigh ratio of up to9.64 within the reversible deformation range. The underlying mechanism is strain-induced bond softening, which sensitively affects anharmonicity represented by three-and four-phonon scattering. The widespread occurrence of four-phonon scattering was confirmed in the thermal transport of 2D materials. Opposite switching trends were discovered, with 2D transition metal dichalcogenide materials showing negative responses to tensile strain while buckled 2D elemental materials showed positive responses. We further proposed a screening descriptor based on strain-induced changes in the Gr¨uneisen parameter for efficiently identifying new high-performance thermal switch materials. This work establishes a paradigm for thermal energy control in 2D materials through strain engineering, which may be experimentally realized in the future via bending, substrate mismatch, and related approaches, thereby laying a robust foundation for further developments and applications.
文摘This editorial comments on the review by Da Silva et al,published in the World Journal of Clinical Oncology which focuses on the molecular perspectives of lung cancer.With the rapid development of molecular technology,new diagnostic methods are constantly emerging,including liquid biopsy,the identification of gene mutations,and the monitoring biomarkers,thus providing precise in-formation with which to identify the occurrence and development of lung cancer.Biomarkers,such as circulating tumor cells,circulating tumor DNA,and cir-culating RNA can provide helpful information for clinical application.Common types of genetic mutations and immune checkpoints include epidermal growth factor receptor,anaplastic lymphoma kinase,c-ROS proto-oncogene 1,progra-mmed death-1 and cytotoxic T-lymphocyte-associated protein.According to specific biomarkers,targeted therapy and immunotherapy can improve survival outcomes based on the types of gene mutation and immune checkpoints.The application of molecular approaches can facilitate our ability to control the progression of disease and select appropriate therapeutic strategies for patients with lung cancer.
文摘BACKGROUND The current surgical treatments for bile duct stones(BDSs)demonstrate suboptimal efficacy,warranting further exploration of superior therapies or improvement of existing surgical protocols.AIM To assess the therapeutic efficacy and safety profiles of endoscopic retrograde cholangiopancreatography(ERCP)vs common bile duct exploration(CBDE)in BDS treatment.METHODS This study enrolled 103 consecutive patients with BDSs treated at the First People’s Hospital of Changde from January 2024 to January 2025,with 53 patients undergoing ERCP(ERCP group)and 50 receiving conventional CBDE(CBDE group).Comprehensive comparative analyses were conducted across multiple parameters,including clinical efficacy,surgical success rate,safety(bile leakage incidence,surgical site infection,acute pancreatitis,and acute cholangitis),postoperative biochemical markers(total bilirubin and serum amylase),surgeryrelated metrics(stone removal time,procedure duration,intraoperative blood loss,and hospitalization time),and postoperative recovery indicators(time to intestinal recovery,jaundice resolution,biliary drainage removal,and postoperative activity recovery).RESULTS The ERCP group demonstrated markedly superior overall efficacy than the CBDE group,with similar surgical success rates and comparable stone removal durations.Importantly,patients undergoing ERCP experienced fewer complications overall,required less operative time,had minimal intraoperative blood loss,and needed shorter hospitalization periods.Recovery parameters such as bowel function recovery,jaundice resolution,biliary stent removal,and normal activity resumption,were significantly improved in the ERCP group.Both groups demonstrated substantial postoperative reductions in total bilirubin and amylase,with no significant intergroup differences.CONCLUSION ERCP demonstrates effectiveness and safety in managing BDSs,thereby providing notable clinical benefits that support its broader implementation in medical practice.
文摘BACKGROUND Cirrhosis-related upper gastrointestinal bleeding(UGIB)poses a fatal risk,and endoscopic ligation as a sole intervention shows inadequate effectiveness.AIM To evaluate the therapeutic efficacy of endoscopic variceal ligation(EVL)plus pro-pranolol vs EVL monotherapy in patients with cirrhosis complicated with acute UGIB and identify predictors for clinical outcomes.METHODS This study enrolled 99 consecutive patients with cirrhosis presenting with acute UGIB between January 2024 and January 2025.Participants were allocated to either the control group(n=49)receiving EVL alone or(2)the research group(n=50)receiving EVL plus propranolol.Primary outcomes included treatment efficacy,venous blood flow[portal venous flow(PVF)/splenic venous flow(SVF)],and postoperative outcomes(hemostasis time,length of hospital stay,and rebleeding rates).Univariate and multivariate regression analyses were conducted to determine independent predictors of treatment response.RESULTS Compared with the control group,the research group demonstrated significantly better outcomes,including higher overall treatment efficacy,greater reductions in PVF and SVF,shorter hemostasis time and hospital stay,and lower rebleeding rates.Univariate analysis demonstrated significant associations between treatment efficacy and age,cirrhosis duration,Child-Pugh grade,bleeding duration,and treatment approach in patients with cirrhosis complicated with acute UGIB.Multivariate logistic regression identified three independent risk factors for poor outcomes,namely,advanced age(>55 years),prolonged cirrhosis duration(≥4 years),and delayed bleeding intervention(>24 hours).CONCLUSION The EVL plus propranolol regimen demonstrates significant efficacy in treating UGIB in cirrhosis,outperforming EVL alone in improving hemodynamics(PVF/SVF),shortening hemostasis and hospitalization duration,and reducing rebleeding rates.Moreover,advanced age,prolonged disease duration,and longer bleeding times are independent risk factors for poor therapeutic outcomes.
基金supported by the National Natural Science Foundation of China(Grant No.52202328,52372099,52271222)the Shanghai Sailing Program(22YF1455500)。
文摘Severe lithium dendrite growth and elevated thermal runaway risks pose significant hurdles for fast-charging lithium metal batteries(LMBs)This study reports a polydopamine-functionalized hydroxyapatite/aramid(PDA@HA)hybrid nanofibers separator to synchronously improve th fast-charging LMB's stability and safety.(1)The separator's surface,enriched with lithiophilic carbonyl and hydroxyl groups,accelerates Li~+ion desolvation,while electrophilic imine groups impede anion movement.This dual mechanism optimizes the Li^(+)-ion flux distribution on th anode,mitigating dendrite formation.(2)The polar PDA modification layer fosters the development of a Li_(3)N/LiF-rich solid electrolyt interface,further enhancing Li anode stability.Consequently,Li//Li symmetric cells with PDA@HA separators exhibit extended cycle life in L plating/stripping tests:5000 h at 1 mA cm^(-2)and 700 h at 20 mA cm^(-2),respectively,outperforming PP separators(80 h and 8 h).In LiFePO_(4)(LFP,^(2.1)mg cm^(-2))//Li full cell evaluation,the PDA@HA separator enables stable operation for 11,000 cycles at 18.2C with 87%capacity retention,significantly outperforming existing fast-charging LMB counterparts in literature.At a high LFP loading of 15.5 mg cm^(-2),the cel maintains 137.6 mAh g^(-1)(2.13 mAh cm^(-2))over 250 cycles at 3C,achieving 98%capacity retention.Moreover,the PDA@HA separato increases threshold temperature for thermal runaway and reduces the exothermic rate,intensifying the battery's thermal safety.This research underscores the importance of functional separator design in improving Li metal anode reversibility,fast-charging performance,and therma safety of LMBs.
