Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs ...Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs contain heavy metals such as Co,Ni,and Mn and organic compounds inside,which seriously threaten human health and the environment.In this work,we review the current status of spent LIB recycling,discuss the traditional pyrometallurgical and hydrometallurgical recovery processes,and summarize the existing short-process recovery technologies such as salt-assisted roasting,flotation processes,and direct recycling.Finally,we analyze the problems and potential research prospects of the current recycling process,and point out that the multidisciplinary integration of recycling will become the mainstream technology for the development of spent LIBs.展开更多
Adopting high-voltage Ni-rich cathodes in halide and sulfide-based all-solid-state lithium batteries(ASSLBs)holds great promise for breaking through the 400 Wh kg^(-1)bottleneck.However,both cell configurations are co...Adopting high-voltage Ni-rich cathodes in halide and sulfide-based all-solid-state lithium batteries(ASSLBs)holds great promise for breaking through the 400 Wh kg^(-1)bottleneck.However,both cell configurations are confronted with intricate interfacial challenges in high-voltage regines(>4.5 V),resulting in inadequate cathode utilization and premature cell degradation.Moreover,contrary to previous studies,coupled with LiNi_(0.85)Co_(0.1)Mn_(0.05)O_(2)cathodes,typical halide(Li_(2)ZrCl_(6))-based cells at 4.5 V feature unlimited interfacial degradation and poor long cycle stability,while typical sulfide(Li_(6)PS_(5)Cl)-based cells feature self-limited interfacial degradation and poor initial cycle stability.Herein,this work addresses the high-voltage limitations of Li_(2)ZrCl_(6)and Li_(6)PS_(5)Cl catholyte-based cells by manipulating electrode mass fraction and tailoring interfacial composition,thereby effectively improving interfacial charge-transfer kinetics and(electro)chemical stability within cathodes.After appropriate interface design,both optimized cells at 4.5 V demonstrate remarkably increased initial discharge capacities(>195 mA h g^(-1)at0.1 C),improved cycle stabilities(>80%after 600 cycles at 0.5 C),and enhanced rate performances(>115 mA h g^(-1)at 1.0 C).This work deepens our understanding of high-voltage applications for halide/sulfide electrolytes and provides generalized interfacial design strategies for advancing high-voltage ASSLBs.展开更多
X-ray detectors show potential applications in medical imaging,materials science,and nuclear energy.To achieve high detection efficiency and spatial resolution,many conventional semiconductor materials,such as amorpho...X-ray detectors show potential applications in medical imaging,materials science,and nuclear energy.To achieve high detection efficiency and spatial resolution,many conventional semiconductor materials,such as amorphous selenium,cadmium telluride zinc,and perovskites,have been utilized in direct conversion X-ray detectors.However,these semiconductor materials are susceptible to temperature-induced performance degradation,crystallization,delamination,uneven lattice growth,radiation damage,and high dark current.This study explores a new approach by coupling an FC40 electronic fluorinated liquid with a specialized high-resolution and high-readout-speed complementary metal-oxide-semiconductor(CMOS)pixel array,specifically the Topmetal II−chip,to fabricate a direct conversion X-ray detector.The fluorinated liquid FC40(molecular formula:C_(21)F_(48)N_(2))is an electronic medium that is minimally affected by temperature and displays no issues with uniform conductivity.It exhibits a low dark current and minimal radiation damage and enables customizable thickness in X-ray absorption.This addresses the limitations inherent in conventional semiconductor-based detectors.In this study,simple X-ray detector imaging tests were conducted,demonstrating the excellent coupling capability between FC40 electronic fluorinated liquid and CMOS chips by the X-ray detector.A spatial resolution of 4.0 lp/mm was measured using a striped line par card,and a relatively clear image of a cockroach was displayed in the digital radiography imaging results.Preliminary test results indicated the feasibility of fabricating an X-ray detector by combining FC40 electronic fluorinated liquid and CMOS chips.Owing to the absence of issues related to chip-material coupling,a high spatial resolution could be achieved by reducing the chip pixel size.This method presents a new avenue for studies on novel liquid-based direct conversion X-ray detectors.展开更多
Salt stress is a global constraint on agricultural production.Therefore,the development of salt tolerant plants has become a current research hotspot.While salt tolerance has evolved more frequently in C_(4) grass lin...Salt stress is a global constraint on agricultural production.Therefore,the development of salt tolerant plants has become a current research hotspot.While salt tolerance has evolved more frequently in C_(4) grass lineages,few studies have explored the molecular bases underlying salt stress tolerance in the C_(4) crop foxtail millet.In this study,we used a multi-pronged approach spanning the omics analyses of transcriptomes and physiological analysis of the C_(3) crop rice and the C_(4) model crop foxtail millet to investigate their responses to salt stress.The results revealed that compared to C_(3) rice,C_(4) foxtail millet has upregulated abscisic acid(ABA)and notably reduced CK biosynthesis and signaling transduction under salt stress.Salt stress in C_(3) rice plants triggered rapid downregulation of photosynthesis related genes,which was coupled with severely reduced net photosynthetic rates.In the salt-treated C_(3) rice and C_(4) foxtail millet,some stress responsive transcription factors(TFs),such as AP2/ERF,WRKY and MYB,underwent strong and distinct transcriptional changes.Based on a weighted gene co-expression network analysis(WGCNA),the AP2/ERF transcription factor Rice Starch Regulator1 SiRSR1(Seita.3G044600)was identified as a key regulator of the salt stress response.To confirm its function,we generated OsRSR1-knockout lines using CRISPR/Cas9 genome editing in rice and its upstream repressor SimiR172a-overexpressing(172a-OE)transgenic plants in foxtail millet,which both showed increased salt tolerance.Overall,this study not only provides new insights into the convergent regulation of the salt stress responses of foxtail millet and rice,but it also sheds light on the divergent signaling networks between them in response to salt stress.展开更多
This paper focuses on the key role and practical paths of operating room nurses in infection control,and studies the difficult problems in the prevention and control of surgical site infections.Analyze the infection r...This paper focuses on the key role and practical paths of operating room nurses in infection control,and studies the difficult problems in the prevention and control of surgical site infections.Analyze the infection risk links in the operating room and the core responsibilities of nurses,reveal the multiple role mechanisms of nurses in infection control,design practical strategies from dimensions such as process optimization,skill improvement,and monitoring feedback,and construct an infection control system involving all staff.Research shows that operating room nurses can effectively reduce the risk of infection,improve medical quality,provide core guarantees for patient safety,and promote the transformation of operating room infection control towards refined management through practical actions such as standardized operation execution,real-time risk monitoring,and team collaboration supervision.展开更多
Green prevention and control management of soil-borne fungal diseases is a hot topic in agriculture,ecology,and the environment.It is an important way to effectively prevent and control soil-borne fungal diseases,solv...Green prevention and control management of soil-borne fungal diseases is a hot topic in agriculture,ecology,and the environment.It is an important way to effectively prevent and control soil-borne fungal diseases,solve soil degradation caused by continuous cropping obstacles,and fulfill the sustainable development of agriculture through revealing the mechanisms of functional substances to develop highly effective soil amendments.Humic acid shows an inhibitory effect on soil-borne pathogenic fungi,such as Fusarium oxysporum,Choanephora cucurbitarum,and Rhizoctonia solani,with the inhibition rate exceeding 80%.The molecular and elemental composition and contents of–COOH,phenolic C,methoxy group C,carboxyl C,aromatic C–O,anomeric C,and other functional groups of humic acid have been inferred to be responsible for its inhibitory effects on pathogenic fungi in previous research.The inhibitory mechanisms mainly include cell physiological morphology,biochemical process reactions,and molecular signal transduction.This review systematically summarizes the chemical structure,fungistatic effects,variable characteristics,and inhibitory mechanisms of humic acid,aiming to provide a theoretical basis for the development of green and efficient prevention and control technologies for soil-borne fungal diseases.展开更多
Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear ...Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear challenge for the practical applications.Herein we report a facile strategy to develop sintering-resistant MHPQDs,e.g.CsPbBr_(3),by localizing them on the surface of inorganic support such as hydroxyapatite(HAP).The chemical interaction between CsPbBr_(3)quantum dots(QDs)and HAP support originates from the occupation of Br vacancies in CsPbBr_(3)by the-O-on the surface of HAP support,which not only stabilizes the small particle sizes(~2.2 nm)of CsPbBr_(3)QDs upon high-temperature(up to 400℃)calcination but also greatly enhances its photoluminescence emission intensity by about150 times.Interestingly,the supported CsPbBr_(3)QDs decorated by cetyltrimethylammonium bromide can further produce water-resistant CsPbBr_(3)@CsPb_(2)Br_(5)QDs.The obtained sintering-resistant hydroxyapatite-supported CsPbBr_(3)@CsPb_(2)Br_(5)QDs can be used to fabricate green light emitting diodes(LED)devices with high luminous intensity for medicolegal identification,flexible luminescence film for display,and potential fluorescent label for bioimaging/biosensing applications.This work demonstrates a novel strategy to design and develop robust all-inorganic QDs composites that may find wide applications in diverse environmental conditions,including high temperature and/or high humidity.展开更多
Conventional empirical equations for estimating undrained shear strength(s_(u))from piezocone penetration test(CPTu)data,without incorporating soil physical properties,often lack the accuracy and robustness required f...Conventional empirical equations for estimating undrained shear strength(s_(u))from piezocone penetration test(CPTu)data,without incorporating soil physical properties,often lack the accuracy and robustness required for geotechnical site investigations.This study introduces a hybrid virus colony search(VCS)algorithm that integrates the standard VCS algorithm with a mutation-based search mechanism to develop high-performance XGBoost learning models to address this limitation.A dataset of 372 seismic CPTu and corresponding soil physical properties data from 26 geotechnical projects in Jiangs_(u)Province,China,was collected for model development.Comparative evaluations demonstrate that the proposed hybrid VCS-XGBoost model exhibits s_(u)perior performance compared to standard meta-heuristic algorithm-based XGBoost models.The res_(u)lts highlight that the consideration of soil physical properties significantly improves the predictive accuracy of s_(u),emphasizing the importance of considering additional soil information beyond CPTu data for accurate s_(u)estimation.展开更多
Rechargeable magnesium batteries(RMBs)have garnered significant attention in energy storage applications due to their high capacity,low cost,and high safety.However,the strong polarization effect and slow kinetic de-i...Rechargeable magnesium batteries(RMBs)have garnered significant attention in energy storage applications due to their high capacity,low cost,and high safety.However,the strong polarization effect and slow kinetic de-intercalation of Mg^(2+)in the cathode limit their commercial application.This study presents a novel interface-coupled V_(2)CT_(x)@VS_(4)heterostructure through a one-step hydrothermal process.In this architecture,V_(2)CT_(x)and VS_(4)can mutually support their structural framework,which effectively prevents the structural collapse of V_(2)CT_(x)MXene and the aggregation of VS_(4).Crucially,interfacial coupling between V_(2)CT_(x)and VS_(4)induces strong V-S bonds,substantially enhancing structural stability.Benefiting from these advantages,the heterostructure exhibits high specific capacity(226 mAh g^(-1)at 100 mA g^(-1))and excellent long-cycle stability(89% capacity retention after 1000 cycles at 500 mA g^(-1)).Furthermore,the Mg^(2+)storage mechanism in the V_(2)CT_(x)@VS_(4)composite was elucidated through a series of ex-situ characterizations.This work provides a feasible strategy for designing V_(2)CT_(x)MXene-based cathodes with high capacity and extended cyclability for RMBs.展开更多
Background: High-intensity focused ultrasound (HIFU) has been introduced to improve skin laxity in recent years. However, very few studies have evaluated the safety and effectiveness of HIFU in Chinese populations. Me...Background: High-intensity focused ultrasound (HIFU) has been introduced to improve skin laxity in recent years. However, very few studies have evaluated the safety and effectiveness of HIFU in Chinese populations. Methods: In the study, 30 Chinese participants underwent HIFU (Bolida, Inc., Changsha, China) rejuvenation between February 1, 2022, and September 30, 2022. There were three different focal depths used depending on the area where shots were captured (4.5 mm, 4 MHz;3 mm, 7 MHz;1.5 mm, 7 MHz). After 3 months and 6 months of treatment, efficacy and safety were assessed by quantitative analysis. Results: Patients were satisfied with the clinical effects of HIFU rejuvenation after one session. In terms of effectiveness, HIFU was most successful in areas around the jawline, cheek, and perioral. In four cases, erythema was observed, in two cases, swollen gums were seen, but all of these effects were transient and mild. Conclusion: Bolida system can be safe and effective for facial tightening, additionally, they are most effective for jawline, cheek, and perioral improvements. In clinical practice, the Bolida system can be recommended as a reliable treatment option. .展开更多
基金financial support by the National Natural Science Foundation of China(No.52374293)Zhongyuan Science and Technology Innovation Leading Talent Project,China(No.224200510025)+1 种基金the Science and Technology Innovation Program of Hunan Province,China(No.2022RC1123)One of the authors,Hong-bo ZENG,gratefully acknowledges the support from the Natural Sciences and Engineering Research Council of Canada(NSERC)and the Canada Research Chairs Program.
文摘Lithium-ion batteries(LIBs)are the most popular energy storage devices due to their high energy density,high operating voltage,and long cycle life.However,green and effective recycling methods are needed because LIBs contain heavy metals such as Co,Ni,and Mn and organic compounds inside,which seriously threaten human health and the environment.In this work,we review the current status of spent LIB recycling,discuss the traditional pyrometallurgical and hydrometallurgical recovery processes,and summarize the existing short-process recovery technologies such as salt-assisted roasting,flotation processes,and direct recycling.Finally,we analyze the problems and potential research prospects of the current recycling process,and point out that the multidisciplinary integration of recycling will become the mainstream technology for the development of spent LIBs.
基金supported by the National Key R&D Program of China(2022YFB3803505)National Natural Scientific Foundation of China(U21A2080&22479009)National Related Project and the Fundamental Research Funds for the Central Universities(FRF-TP-22-01C2)。
文摘Adopting high-voltage Ni-rich cathodes in halide and sulfide-based all-solid-state lithium batteries(ASSLBs)holds great promise for breaking through the 400 Wh kg^(-1)bottleneck.However,both cell configurations are confronted with intricate interfacial challenges in high-voltage regines(>4.5 V),resulting in inadequate cathode utilization and premature cell degradation.Moreover,contrary to previous studies,coupled with LiNi_(0.85)Co_(0.1)Mn_(0.05)O_(2)cathodes,typical halide(Li_(2)ZrCl_(6))-based cells at 4.5 V feature unlimited interfacial degradation and poor long cycle stability,while typical sulfide(Li_(6)PS_(5)Cl)-based cells feature self-limited interfacial degradation and poor initial cycle stability.Herein,this work addresses the high-voltage limitations of Li_(2)ZrCl_(6)and Li_(6)PS_(5)Cl catholyte-based cells by manipulating electrode mass fraction and tailoring interfacial composition,thereby effectively improving interfacial charge-transfer kinetics and(electro)chemical stability within cathodes.After appropriate interface design,both optimized cells at 4.5 V demonstrate remarkably increased initial discharge capacities(>195 mA h g^(-1)at0.1 C),improved cycle stabilities(>80%after 600 cycles at 0.5 C),and enhanced rate performances(>115 mA h g^(-1)at 1.0 C).This work deepens our understanding of high-voltage applications for halide/sulfide electrolytes and provides generalized interfacial design strategies for advancing high-voltage ASSLBs.
基金supported by the National Natural Science Foundation of China(No.12235006)the National Key Research and Development Program of China(No.2020YFE0202002.
文摘X-ray detectors show potential applications in medical imaging,materials science,and nuclear energy.To achieve high detection efficiency and spatial resolution,many conventional semiconductor materials,such as amorphous selenium,cadmium telluride zinc,and perovskites,have been utilized in direct conversion X-ray detectors.However,these semiconductor materials are susceptible to temperature-induced performance degradation,crystallization,delamination,uneven lattice growth,radiation damage,and high dark current.This study explores a new approach by coupling an FC40 electronic fluorinated liquid with a specialized high-resolution and high-readout-speed complementary metal-oxide-semiconductor(CMOS)pixel array,specifically the Topmetal II−chip,to fabricate a direct conversion X-ray detector.The fluorinated liquid FC40(molecular formula:C_(21)F_(48)N_(2))is an electronic medium that is minimally affected by temperature and displays no issues with uniform conductivity.It exhibits a low dark current and minimal radiation damage and enables customizable thickness in X-ray absorption.This addresses the limitations inherent in conventional semiconductor-based detectors.In this study,simple X-ray detector imaging tests were conducted,demonstrating the excellent coupling capability between FC40 electronic fluorinated liquid and CMOS chips by the X-ray detector.A spatial resolution of 4.0 lp/mm was measured using a striped line par card,and a relatively clear image of a cockroach was displayed in the digital radiography imaging results.Preliminary test results indicated the feasibility of fabricating an X-ray detector by combining FC40 electronic fluorinated liquid and CMOS chips.Owing to the absence of issues related to chip-material coupling,a high spatial resolution could be achieved by reducing the chip pixel size.This method presents a new avenue for studies on novel liquid-based direct conversion X-ray detectors.
基金supported by the National Natural Science Foundation of China(32241042)the National Key R&D Program of China(2019YFD1000700 and 2019YFD1000703)the Biological Breeding-National Science and Technology Major Project,China(2022ZD04017).
文摘Salt stress is a global constraint on agricultural production.Therefore,the development of salt tolerant plants has become a current research hotspot.While salt tolerance has evolved more frequently in C_(4) grass lineages,few studies have explored the molecular bases underlying salt stress tolerance in the C_(4) crop foxtail millet.In this study,we used a multi-pronged approach spanning the omics analyses of transcriptomes and physiological analysis of the C_(3) crop rice and the C_(4) model crop foxtail millet to investigate their responses to salt stress.The results revealed that compared to C_(3) rice,C_(4) foxtail millet has upregulated abscisic acid(ABA)and notably reduced CK biosynthesis and signaling transduction under salt stress.Salt stress in C_(3) rice plants triggered rapid downregulation of photosynthesis related genes,which was coupled with severely reduced net photosynthetic rates.In the salt-treated C_(3) rice and C_(4) foxtail millet,some stress responsive transcription factors(TFs),such as AP2/ERF,WRKY and MYB,underwent strong and distinct transcriptional changes.Based on a weighted gene co-expression network analysis(WGCNA),the AP2/ERF transcription factor Rice Starch Regulator1 SiRSR1(Seita.3G044600)was identified as a key regulator of the salt stress response.To confirm its function,we generated OsRSR1-knockout lines using CRISPR/Cas9 genome editing in rice and its upstream repressor SimiR172a-overexpressing(172a-OE)transgenic plants in foxtail millet,which both showed increased salt tolerance.Overall,this study not only provides new insights into the convergent regulation of the salt stress responses of foxtail millet and rice,but it also sheds light on the divergent signaling networks between them in response to salt stress.
文摘This paper focuses on the key role and practical paths of operating room nurses in infection control,and studies the difficult problems in the prevention and control of surgical site infections.Analyze the infection risk links in the operating room and the core responsibilities of nurses,reveal the multiple role mechanisms of nurses in infection control,design practical strategies from dimensions such as process optimization,skill improvement,and monitoring feedback,and construct an infection control system involving all staff.Research shows that operating room nurses can effectively reduce the risk of infection,improve medical quality,provide core guarantees for patient safety,and promote the transformation of operating room infection control towards refined management through practical actions such as standardized operation execution,real-time risk monitoring,and team collaboration supervision.
基金supported by the National Natural Science Foundation of China(Nos.42207371 and 32071642)the Scientific Project of Jiangsu Vocational College of Agriculture and Forestry,China(No.2021kj17)the Key Research Projects of Jiangsu Vocational College of Agriculture and Forestry,China(No.2023kj14)。
文摘Green prevention and control management of soil-borne fungal diseases is a hot topic in agriculture,ecology,and the environment.It is an important way to effectively prevent and control soil-borne fungal diseases,solve soil degradation caused by continuous cropping obstacles,and fulfill the sustainable development of agriculture through revealing the mechanisms of functional substances to develop highly effective soil amendments.Humic acid shows an inhibitory effect on soil-borne pathogenic fungi,such as Fusarium oxysporum,Choanephora cucurbitarum,and Rhizoctonia solani,with the inhibition rate exceeding 80%.The molecular and elemental composition and contents of–COOH,phenolic C,methoxy group C,carboxyl C,aromatic C–O,anomeric C,and other functional groups of humic acid have been inferred to be responsible for its inhibitory effects on pathogenic fungi in previous research.The inhibitory mechanisms mainly include cell physiological morphology,biochemical process reactions,and molecular signal transduction.This review systematically summarizes the chemical structure,fungistatic effects,variable characteristics,and inhibitory mechanisms of humic acid,aiming to provide a theoretical basis for the development of green and efficient prevention and control technologies for soil-borne fungal diseases.
基金financially supported by the National Natural Science Foundation of China(No.82171883)the Shanxi Provincial Key Research and Development Project(202102130501002)+1 种基金the Science and Technology Innovation Leader and Key Talent Team Project of Shanxi Province(202204051002034)the NSFC Center for Single-Atom Catalysis(22388102)。
文摘Metal halide perovskite quantum dots(MHPQDs)have attracted intensive interest because of their unique optoelectronic properties.Their undesirable degradation upon exposure to humidity and/or heat,however,poses a dear challenge for the practical applications.Herein we report a facile strategy to develop sintering-resistant MHPQDs,e.g.CsPbBr_(3),by localizing them on the surface of inorganic support such as hydroxyapatite(HAP).The chemical interaction between CsPbBr_(3)quantum dots(QDs)and HAP support originates from the occupation of Br vacancies in CsPbBr_(3)by the-O-on the surface of HAP support,which not only stabilizes the small particle sizes(~2.2 nm)of CsPbBr_(3)QDs upon high-temperature(up to 400℃)calcination but also greatly enhances its photoluminescence emission intensity by about150 times.Interestingly,the supported CsPbBr_(3)QDs decorated by cetyltrimethylammonium bromide can further produce water-resistant CsPbBr_(3)@CsPb_(2)Br_(5)QDs.The obtained sintering-resistant hydroxyapatite-supported CsPbBr_(3)@CsPb_(2)Br_(5)QDs can be used to fabricate green light emitting diodes(LED)devices with high luminous intensity for medicolegal identification,flexible luminescence film for display,and potential fluorescent label for bioimaging/biosensing applications.This work demonstrates a novel strategy to design and develop robust all-inorganic QDs composites that may find wide applications in diverse environmental conditions,including high temperature and/or high humidity.
基金funded by the National Science Fund for Distinguished Young Scholars(Grant No.42225206)the National Key R&D Program of China(Grant No.2020YFC1807200)the National Natural Science Foundation of China(Grant No.42072299).
文摘Conventional empirical equations for estimating undrained shear strength(s_(u))from piezocone penetration test(CPTu)data,without incorporating soil physical properties,often lack the accuracy and robustness required for geotechnical site investigations.This study introduces a hybrid virus colony search(VCS)algorithm that integrates the standard VCS algorithm with a mutation-based search mechanism to develop high-performance XGBoost learning models to address this limitation.A dataset of 372 seismic CPTu and corresponding soil physical properties data from 26 geotechnical projects in Jiangs_(u)Province,China,was collected for model development.Comparative evaluations demonstrate that the proposed hybrid VCS-XGBoost model exhibits s_(u)perior performance compared to standard meta-heuristic algorithm-based XGBoost models.The res_(u)lts highlight that the consideration of soil physical properties significantly improves the predictive accuracy of s_(u),emphasizing the importance of considering additional soil information beyond CPTu data for accurate s_(u)estimation.
基金Financial support from the National Natural Science Foundation of China(52302317)is gratefully acknowledged。
文摘Rechargeable magnesium batteries(RMBs)have garnered significant attention in energy storage applications due to their high capacity,low cost,and high safety.However,the strong polarization effect and slow kinetic de-intercalation of Mg^(2+)in the cathode limit their commercial application.This study presents a novel interface-coupled V_(2)CT_(x)@VS_(4)heterostructure through a one-step hydrothermal process.In this architecture,V_(2)CT_(x)and VS_(4)can mutually support their structural framework,which effectively prevents the structural collapse of V_(2)CT_(x)MXene and the aggregation of VS_(4).Crucially,interfacial coupling between V_(2)CT_(x)and VS_(4)induces strong V-S bonds,substantially enhancing structural stability.Benefiting from these advantages,the heterostructure exhibits high specific capacity(226 mAh g^(-1)at 100 mA g^(-1))and excellent long-cycle stability(89% capacity retention after 1000 cycles at 500 mA g^(-1)).Furthermore,the Mg^(2+)storage mechanism in the V_(2)CT_(x)@VS_(4)composite was elucidated through a series of ex-situ characterizations.This work provides a feasible strategy for designing V_(2)CT_(x)MXene-based cathodes with high capacity and extended cyclability for RMBs.
文摘Background: High-intensity focused ultrasound (HIFU) has been introduced to improve skin laxity in recent years. However, very few studies have evaluated the safety and effectiveness of HIFU in Chinese populations. Methods: In the study, 30 Chinese participants underwent HIFU (Bolida, Inc., Changsha, China) rejuvenation between February 1, 2022, and September 30, 2022. There were three different focal depths used depending on the area where shots were captured (4.5 mm, 4 MHz;3 mm, 7 MHz;1.5 mm, 7 MHz). After 3 months and 6 months of treatment, efficacy and safety were assessed by quantitative analysis. Results: Patients were satisfied with the clinical effects of HIFU rejuvenation after one session. In terms of effectiveness, HIFU was most successful in areas around the jawline, cheek, and perioral. In four cases, erythema was observed, in two cases, swollen gums were seen, but all of these effects were transient and mild. Conclusion: Bolida system can be safe and effective for facial tightening, additionally, they are most effective for jawline, cheek, and perioral improvements. In clinical practice, the Bolida system can be recommended as a reliable treatment option. .
