The investigation of bile pigments (bilirubin (BR), biliverdin (BV), purpurin (Pu), choletelin (Ch) etc.) by cyclic voltammetry, in-situ rapid scanning thin layer spectroelectrochemistry and ESR spectroscopy indicates...The investigation of bile pigments (bilirubin (BR), biliverdin (BV), purpurin (Pu), choletelin (Ch) etc.) by cyclic voltammetry, in-situ rapid scanning thin layer spectroelectrochemistry and ESR spectroscopy indicates that many free radical intermediates and polymers are produced during oxidation and reduction processes.展开更多
In this paper, the authors analyzed the correlation between the microbiological stability of white wines and the content of sulfur dioxide, which influences the main redox processes that take place in the technologica...In this paper, the authors analyzed the correlation between the microbiological stability of white wines and the content of sulfur dioxide, which influences the main redox processes that take place in the technological stages of the wine. The consecutive, parallel and spontaneous development of several redox processes and their impact on the quality, microbiological and crystalline stability of white wines were examined. The reduction of additive and subtractive technological interventions, of the amounts of adjuvants (sulphurous anhydride) is essential for the production of organic wines.展开更多
The lunar regolith records signatures of material‒energy interactions with both the solar system and beyond.Traditional space weathering processes,based on laboratory analyses and remote-sensing data,emphasize a reduc...The lunar regolith records signatures of material‒energy interactions with both the solar system and beyond.Traditional space weathering processes,based on laboratory analyses and remote-sensing data,emphasize a reduction-dominated paradigm in which nanophase metallic iron(np-Fe^(0))formation and spectral reddening are primarily driven by micrometeorite impacts and solar wind irradiation.However,emerging evidence of complex oxidation processes,including impact-generated magnetite,disproportionation reactions,and oxidation signatures potentially induced by Earth's magnetotail,challenges this conventional view.These conflicting evolutionary signatures indicate that existing models may fail to capture the full spectrum of oxidation and reduction pathways involved in lunar space weathering.Integrating laboratory analyses and remote-sensing data,we here construct a multi-scale redox dynamics framework that elucidates three critical reaction processes:vapor deposition,in situ reduction,and self-redox reactions.This framework reveals a spatiotemporal decoupling between globally sustained reduction and localized,episodic oxidation events.This review provides key constraints for understanding the complex lunar surface evolution mechanisms and long-term evolution of airless planetary bodies.展开更多
The effective elimination of aromatic compounds from wastewater is imperative for safeguarding the ecological environment.Bioelectrochemical processes that combine cathodic reduction and anodic oxidation represent a p...The effective elimination of aromatic compounds from wastewater is imperative for safeguarding the ecological environment.Bioelectrochemical processes that combine cathodic reduction and anodic oxidation represent a promising approach for the biomineralization of aromatic compounds.However,conventional direct current bioelectrochemical methods have intrinsic limitations.In this study,a low-frequency and low-voltage alternating current(LFV-AC)-driven bioelectrode offering periodic in situ coupling of reduction and oxidation processes was developed for the biomineralization of aromatic compounds,as exemplified by the degradation of alizarin yellow R(AYR).LFV-AC stimulated biofilm demonstrated efficient bidirectional electron transfer and oxidation–reduction bifunctionality,considerably boosting AYR reduction(63.07%±1.91%)and subsequent mineralization of intermediate products(98.63%±0.37%).LFV-AC stimulation facilitated the assembly of a collaborative microbiome dedicated to AYR metabolism,characterized by an increased abundance of functional consortia proficient in azo dye reduction(Stenotrophomonas and Bradyrhizobium),aromatic intermediate oxidation(Sphingopyxis and Sphingomonas),and electron transfer(Geobacter and Pseudomonas).The collaborative microbiome demonstrated a notable enrichment of functional genes encoding azo-and nitro-reductases,catechol oxygenases,and redox mediator proteins.These findings highlight the effectiveness of LFV-AC stimulation in boosting azo dye biomineralization,offering a novel and sustainable approach for the efficient removal of refractory organic pollutants from wastewater.展开更多
Lithium-sulfur batteries(LSBs)have become a favorable contender for next-generation electrochemical energy storage systems due to their outstanding features such as high energy density,low cost,and environmental frien...Lithium-sulfur batteries(LSBs)have become a favorable contender for next-generation electrochemical energy storage systems due to their outstanding features such as high energy density,low cost,and environmental friendliness.However,the commercialization of LSBs is still characterized by critical issues such as low sulfur utilization,short cycle life,and poor rate performance,which need to be resolved.Single-atom catalysts,with their outstanding features such as ultra-high atom utilization rate close to 100%and adjustable coordination configuration,have received extensive attention in the field of lithium-sulfur battery research.In this paper,the preparation and characterization of single-atom catalysts for Li-S batteries are briefly introduced,and the latest research progress of single-atom catalysts for Li-S batteries is reviewed from three aspects:cathode,separator and anode.Finally,the key technical problems and future research directions of single-atom catalysts for lithium-sulfur batteries are also prospected,with a view to promoting the further development of commercialized LSBs.展开更多
Iron and manganese oxides are common components of soils. They frequently occur in nodules constituting important soil sorbents and play a crucial role in a number of chemical reactions in the soil environment. In add...Iron and manganese oxides are common components of soils. They frequently occur in nodules constituting important soil sorbents and play a crucial role in a number of chemical reactions in the soil environment. In addition, the oxides are very sensitive to environmental changes (moisture, pH, Eh) constituting important indicators of soil-forming processes and water movement in the landscape. The objectives of the study were: i) to examine the distribution and size of Fe-Mn nodules in Albeluvisols containing a fragipan horizon; ii) to determine the morphology and chemical composition of the nodules, and iii) to estimate the effect of the fragipan horizon on water movement within the soil profile. An investigation was carried out on five soil profiles containing a fragipan horizon and classified as Fragic Albeluvisols within the Carpathian Foothills in Poland. In the Albeluvisols studied, the maximum concentration of Fe-Mn nodules occurred in the horizon lying directly on the fragipan horizon. This suggests that the pan acts as a natural barrier restricting water infiltration and leads to the seasonal development of a perched water table promoting redox processes. The most common are coarse (1-0.5 mm) and medium (0.5-0.25 mm) irregular Fe-Mn nodules showing a gradual boundary and undifferentiated internal fabric. Eluvial horizons contained also larger amounts of round and dense nodules with a sharp boundary, suggesting frequent oxidation and reduction. The fragipan horizon contained mainly irregular and soft nodules, suggesting longer saturation with water during the year. Concentrations of trace elements (Cu, Zn) and P were higher within Fe-Mn nodules than in the surrounding soil materials, showing that iron and manganese oxides adsorbed and immobilised these elements.展开更多
文摘The investigation of bile pigments (bilirubin (BR), biliverdin (BV), purpurin (Pu), choletelin (Ch) etc.) by cyclic voltammetry, in-situ rapid scanning thin layer spectroelectrochemistry and ESR spectroscopy indicates that many free radical intermediates and polymers are produced during oxidation and reduction processes.
文摘In this paper, the authors analyzed the correlation between the microbiological stability of white wines and the content of sulfur dioxide, which influences the main redox processes that take place in the technological stages of the wine. The consecutive, parallel and spontaneous development of several redox processes and their impact on the quality, microbiological and crystalline stability of white wines were examined. The reduction of additive and subtractive technological interventions, of the amounts of adjuvants (sulphurous anhydride) is essential for the production of organic wines.
基金supported by the National Natural Science Foundation of China(grant Nos.42441804,42273042,and 42303041)The Open Fund Project of National Key Laboratory of Deep Space Exploration(grant No.NKDSEL2024003)+8 种基金The National Natural Science Foundation of China(grant No.U24A2008)Youth Innovation Promotion Association Chinese Academy of Sciences(CAS)awards“From 0 to 1”Original Exploration Cultivation Project,Institute of Geochemistry,CAS(grant No.DHSZZ2023.3)Bureau of Frontier Sciences and Basic Research,CAS(grant No.QYJ-2025-0103)Guizhou Provincial Foundation for Excellent Scholars Program(grant No.GCC[2023]088)Provincial Key Research and Development Plan Projects of Heilongjiang(grant No.2024ZXDXB52)Innovation and Development Fund of Science and Technology,Institute of Geochemistry,CASand Guizhou Province Basic Research Program Project(grant No.QKHJC-ZK[2023]-General 473)Innovation Project of Guangxi Graduate Education(grant No.YCBZ2023144).
文摘The lunar regolith records signatures of material‒energy interactions with both the solar system and beyond.Traditional space weathering processes,based on laboratory analyses and remote-sensing data,emphasize a reduction-dominated paradigm in which nanophase metallic iron(np-Fe^(0))formation and spectral reddening are primarily driven by micrometeorite impacts and solar wind irradiation.However,emerging evidence of complex oxidation processes,including impact-generated magnetite,disproportionation reactions,and oxidation signatures potentially induced by Earth's magnetotail,challenges this conventional view.These conflicting evolutionary signatures indicate that existing models may fail to capture the full spectrum of oxidation and reduction pathways involved in lunar space weathering.Integrating laboratory analyses and remote-sensing data,we here construct a multi-scale redox dynamics framework that elucidates three critical reaction processes:vapor deposition,in situ reduction,and self-redox reactions.This framework reveals a spatiotemporal decoupling between globally sustained reduction and localized,episodic oxidation events.This review provides key constraints for understanding the complex lunar surface evolution mechanisms and long-term evolution of airless planetary bodies.
基金supported by the National Natural Science Foundation of China(52170054,51608467,and 52200202)the“Qing Lan Project”of Colleges and Universities in Jiangsu Province。
文摘The effective elimination of aromatic compounds from wastewater is imperative for safeguarding the ecological environment.Bioelectrochemical processes that combine cathodic reduction and anodic oxidation represent a promising approach for the biomineralization of aromatic compounds.However,conventional direct current bioelectrochemical methods have intrinsic limitations.In this study,a low-frequency and low-voltage alternating current(LFV-AC)-driven bioelectrode offering periodic in situ coupling of reduction and oxidation processes was developed for the biomineralization of aromatic compounds,as exemplified by the degradation of alizarin yellow R(AYR).LFV-AC stimulated biofilm demonstrated efficient bidirectional electron transfer and oxidation–reduction bifunctionality,considerably boosting AYR reduction(63.07%±1.91%)and subsequent mineralization of intermediate products(98.63%±0.37%).LFV-AC stimulation facilitated the assembly of a collaborative microbiome dedicated to AYR metabolism,characterized by an increased abundance of functional consortia proficient in azo dye reduction(Stenotrophomonas and Bradyrhizobium),aromatic intermediate oxidation(Sphingopyxis and Sphingomonas),and electron transfer(Geobacter and Pseudomonas).The collaborative microbiome demonstrated a notable enrichment of functional genes encoding azo-and nitro-reductases,catechol oxygenases,and redox mediator proteins.These findings highlight the effectiveness of LFV-AC stimulation in boosting azo dye biomineralization,offering a novel and sustainable approach for the efficient removal of refractory organic pollutants from wastewater.
基金supported by the Shenzhen Key Basic Research Project:Ionic Liquid-Assisted Synthesis of Single Catalyst and Its Applications in Lithium Sulfur Batteries(GXWD20220817125846003)Major Instrument Project of National Natural Science Foundation of China(62127807)Shenzhen Sustainable Development Special Project(KCXFZ20201221173000001).
文摘Lithium-sulfur batteries(LSBs)have become a favorable contender for next-generation electrochemical energy storage systems due to their outstanding features such as high energy density,low cost,and environmental friendliness.However,the commercialization of LSBs is still characterized by critical issues such as low sulfur utilization,short cycle life,and poor rate performance,which need to be resolved.Single-atom catalysts,with their outstanding features such as ultra-high atom utilization rate close to 100%and adjustable coordination configuration,have received extensive attention in the field of lithium-sulfur battery research.In this paper,the preparation and characterization of single-atom catalysts for Li-S batteries are briefly introduced,and the latest research progress of single-atom catalysts for Li-S batteries is reviewed from three aspects:cathode,separator and anode.Finally,the key technical problems and future research directions of single-atom catalysts for lithium-sulfur batteries are also prospected,with a view to promoting the further development of commercialized LSBs.
基金Supported by the Polish State Committee for Scientific Research (No. N N305 120934)
文摘Iron and manganese oxides are common components of soils. They frequently occur in nodules constituting important soil sorbents and play a crucial role in a number of chemical reactions in the soil environment. In addition, the oxides are very sensitive to environmental changes (moisture, pH, Eh) constituting important indicators of soil-forming processes and water movement in the landscape. The objectives of the study were: i) to examine the distribution and size of Fe-Mn nodules in Albeluvisols containing a fragipan horizon; ii) to determine the morphology and chemical composition of the nodules, and iii) to estimate the effect of the fragipan horizon on water movement within the soil profile. An investigation was carried out on five soil profiles containing a fragipan horizon and classified as Fragic Albeluvisols within the Carpathian Foothills in Poland. In the Albeluvisols studied, the maximum concentration of Fe-Mn nodules occurred in the horizon lying directly on the fragipan horizon. This suggests that the pan acts as a natural barrier restricting water infiltration and leads to the seasonal development of a perched water table promoting redox processes. The most common are coarse (1-0.5 mm) and medium (0.5-0.25 mm) irregular Fe-Mn nodules showing a gradual boundary and undifferentiated internal fabric. Eluvial horizons contained also larger amounts of round and dense nodules with a sharp boundary, suggesting frequent oxidation and reduction. The fragipan horizon contained mainly irregular and soft nodules, suggesting longer saturation with water during the year. Concentrations of trace elements (Cu, Zn) and P were higher within Fe-Mn nodules than in the surrounding soil materials, showing that iron and manganese oxides adsorbed and immobilised these elements.
