BACKGROUND Ulcerative colitis(UC)is a chronic and debilitating inflammatory bowel disease.Cumulative evidence indicates that excess hydrogen peroxide,a potent neutrophilic chemotactic agent,produced by colonic epithel...BACKGROUND Ulcerative colitis(UC)is a chronic and debilitating inflammatory bowel disease.Cumulative evidence indicates that excess hydrogen peroxide,a potent neutrophilic chemotactic agent,produced by colonic epithelial cells has a causal role leading to infiltration of neutrophils into the colonic mucosa and subsequent development of UC.This evidence-based mechanism identifies hydrogen peroxide as a therapeutic target for reducing agents in the treatment of UC.CASE SUMMARY Presented is a 41-year-old female with a 26-year history of refractory UC.Having developed steroid dependence and never achieving complete remission on treatment by conventional and advanced therapies,she began treatment with oral R-dihydrolipoic acid(RDLA),a lipid-soluble reducing agent with intracellular site of action.Within a week,rectal bleeding ceased.She was asymptomatic for three years until a highly stressful experience,when she noticed blood in her stool.RDLA was discontinued,and she began treatment with oral sodium thiosulfate pentahydrate(STS),a reducing agent with extracellular site of action.After a week,rectal bleeding ceased,and she resumed oral RDLA and discontinued STS.To date,she remains asymptomatic with normal stool calprotectin while on RDLA.CONCLUSION STS and RDLA are reducing agents that serve as highly effective and safe therapy for the induction and maintenance of remission in UC,even in patients refractory or poorly controlled by conventional and advanced therapies.Should preliminary findings be validated by subsequent clinical trials,the use of reducing agents could potentially prevent thousands of colectomies and represent a paradigm shift in the treatment of UC.展开更多
The sulfate-reducing bacteria(SRB)corrosion of H70 brass,H80 brass and T2 copper was systematically studied using microstructure characterizations and electrochemical measurements.The results showed that H70 brass,H80...The sulfate-reducing bacteria(SRB)corrosion of H70 brass,H80 brass and T2 copper was systematically studied using microstructure characterizations and electrochemical measurements.The results showed that H70 brass,H80 brass and T2 copper exhibited good corrosion resistance in the sterile environment,and the corrosion products were mainly metal oxides,such as Cu_(2)O,CuO and ZnO.The SRB metabolism sharply accelerated the corrosion process of three types of copper alloys,especially the T2 copper.In the inoculated environment,an additional mixture of Cu_(2)S,ZnS and CuSO_(4)existed in the corrosion products.Pitting corrosion was the main corrosion style for the H70 brass and H80 brass,while general corrosion and pitting corrosion simultaneously dominated the corrosion process of the T2 copper in this environment.The results provide a new insight to the microbiological corrosion of copper alloys.展开更多
Cement production,while essential for global infrastructure,contributes significantly to carbon dioxide emissions,accounting for approximately 7%of total emissions.To mitigate these environmental impacts,flash calcina...Cement production,while essential for global infrastructure,contributes significantly to carbon dioxide emissions,accounting for approximately 7%of total emissions.To mitigate these environmental impacts,flash calcination of kaolinitic clays has been investigated as a sustainable alternative.This technique involves the rapid heating of clays,enabling their use as supplementary cementitious materials.The primary objective of this study was to modify the color of calcined clay in various atmospheres(oxidizing,inert,and reducing)to achieve a grayish tone similar to commercial cement while preserving its reactive properties.The experimental procedure employed a tubular reactor with precise control of gas flows(atmospheric air,nitrogen,and a carbon monoxide–nitrogen mixture).Physicochemical characterization of the raw clay was conducted before calcination,with analyses repeated on the calcined clays following experimentation.Results indicated that clay calcined in an oxidizing atmosphere acquired a reddish hue,attributed to the oxidation of iron in hematite.The Clay exhibited a pinkish tone in an inert atmosphere,while calcination in a reducing atmosphere yielded the desired grayish color.Regarding pozzolanic activity,clays calcined in oxidizing and inert atmospheres displayed robust strength,ranging from 82%to 87%.Calcination in a reducing atmosphere resulted in slightly lower strength,around 74%,likely due to the clay’s chemical composition and the calcination process,which affects compound formation and material reactivity.展开更多
This study numerically investigates the seismic response of a nine-story self-centering concentrically braced frame building incorporating force-limiting connections between the floor system and the lateral force-resi...This study numerically investigates the seismic response of a nine-story self-centering concentrically braced frame building incorporating force-limiting connections between the floor system and the lateral force-resisting system.Nonlinear earthquake simulations are conducted under design basis earthquake ground motions,and the results are compared against a baseline model with rigid-elastic connections.The study discusses connection design considerations and evaluates the effectiveness of force-limiting connections in mitigating higher-mode effects.The findings show that force-limiting connections significantly reduce the magnitude and variability of floor accelerations,brace forces,and connection forces,while maintaining comparable story drifts.limiting Force-connections primarily reduce the contribution of higher-mode responses,while the controlled rocking base mechanism modifies the first-mode response.Overall,the reduced dispersion in structural response improves the reliability of seismic design and enhances resilience by minimizing damage to both structural components and acceleration-sensitive nonstructural elements.展开更多
Natural gas is widely regarded as an efficient,relatively clean,and economically viable energy source.Its safe operation and continuous supply through pipeline infrastructure has led to its prominence in the energy se...Natural gas is widely regarded as an efficient,relatively clean,and economically viable energy source.Its safe operation and continuous supply through pipeline infrastructure has led to its prominence in the energy sector.Methanol plays an important role in the natural gas industry,typically serving as a solvent or hydrate inhibitor.Therefore,the accurate estimation of thermodynamic properties for methane/methanol binary is extremely important to optimise the operating parameter,maximise the dehydration effect,and reduce the cost.As the Helmholtz energy equation of state is expected to offer high accuracy in predicting the vapour-liquid equilibrium of methane/methanol binary,four reducing parameters were derived based on collected experimental data.Additionally,the sensitivities of various reducing parameter combinations were simultaneously investigated.The results demonstrated a strong agreement between predicted fractions and experimental data,with the UMADs(uncertainty-weighted mean absolute deviation)of 3.484 and 0.665 for liquid and vapour phases,respectively.Meanwhile,it is deemed“very likely”,“likely”,and“unlikely”to achieve acceptable prediction for 3-parameter optimisation,2-parameter optimisation and,1-parameter optimisation,respectively.展开更多
Redox dyshomeostasis is a critical factor in the initiation of numerous diseases,making the accurate evaluation of the redox status of the cellular environment an important aspect of physiological research.However,mai...Redox dyshomeostasis is a critical factor in the initiation of numerous diseases,making the accurate evaluation of the redox status of the cellular environment an important aspect of physiological research.However,maintaining redox homeostasis relies on a complex and dynamic physiological system involving multiple substrate-enzyme interactions,so its accurately detection remains a challenge.With this research,we developed an activable fiuorescence switching platform by incorporating different conjugate acceptors to a fiuorophore using ester bonds and resulting in fiuorescence quenching due to donor-excited photo-induced electron transfer(d-Pe T),which was confirmed through density functional theory calculations.The reaction-based probe was deployed for recognizing all major intracellular reducing sulfur species(RSS),including H_(2)S,cysteine(Cys),homocysteine(Hcy),glutathione(GSH),and protein free thiols.The quenched fiuorescence was significantly recovered by RSS,through releasing the fiuorophore and diminishing the d-Pe T effect.Furthermore,the fiuorescent probe was used for the sensing and imaging RSS in living cells,demonstrating good cell-permeability,low cytotoxicity,and negative correlation with reactive oxygen species content,enabling the evaluating of global thiols redox state in Hep G2 cellular lines during ferroptosis processes.展开更多
In the article“Silencing of the long non-coding RNA LINC00265 triggers autophagy and apoptosis in lung cancer by reducing protein stability of SIN3A oncogene”(Oncology Research.2024,Vol.32,No.7,pp.1185–1195.doi:10....In the article“Silencing of the long non-coding RNA LINC00265 triggers autophagy and apoptosis in lung cancer by reducing protein stability of SIN3A oncogene”(Oncology Research.2024,Vol.32,No.7,pp.1185–1195.doi:10.32604/or.2023.030771,https://www.techscience.com/or/v32n7/57163),an inadvertent error occurred during the compilation of Fig.3H.This needed corrections to ensure the accuracy and integrity of the data presented.展开更多
文摘BACKGROUND Ulcerative colitis(UC)is a chronic and debilitating inflammatory bowel disease.Cumulative evidence indicates that excess hydrogen peroxide,a potent neutrophilic chemotactic agent,produced by colonic epithelial cells has a causal role leading to infiltration of neutrophils into the colonic mucosa and subsequent development of UC.This evidence-based mechanism identifies hydrogen peroxide as a therapeutic target for reducing agents in the treatment of UC.CASE SUMMARY Presented is a 41-year-old female with a 26-year history of refractory UC.Having developed steroid dependence and never achieving complete remission on treatment by conventional and advanced therapies,she began treatment with oral R-dihydrolipoic acid(RDLA),a lipid-soluble reducing agent with intracellular site of action.Within a week,rectal bleeding ceased.She was asymptomatic for three years until a highly stressful experience,when she noticed blood in her stool.RDLA was discontinued,and she began treatment with oral sodium thiosulfate pentahydrate(STS),a reducing agent with extracellular site of action.After a week,rectal bleeding ceased,and she resumed oral RDLA and discontinued STS.To date,she remains asymptomatic with normal stool calprotectin while on RDLA.CONCLUSION STS and RDLA are reducing agents that serve as highly effective and safe therapy for the induction and maintenance of remission in UC,even in patients refractory or poorly controlled by conventional and advanced therapies.Should preliminary findings be validated by subsequent clinical trials,the use of reducing agents could potentially prevent thousands of colectomies and represent a paradigm shift in the treatment of UC.
基金the financial support of the National Natural Science Foundation of China(No.51971191)Scientific Research Project of Education Department of Hunan Province(Nos.22B0178,22C0075)+1 种基金Hunan Provincial Innovation Foundation for Postgraduate(No.CX20220558)the National Scholarship Foundation(No.202008430013)。
文摘The sulfate-reducing bacteria(SRB)corrosion of H70 brass,H80 brass and T2 copper was systematically studied using microstructure characterizations and electrochemical measurements.The results showed that H70 brass,H80 brass and T2 copper exhibited good corrosion resistance in the sterile environment,and the corrosion products were mainly metal oxides,such as Cu_(2)O,CuO and ZnO.The SRB metabolism sharply accelerated the corrosion process of three types of copper alloys,especially the T2 copper.In the inoculated environment,an additional mixture of Cu_(2)S,ZnS and CuSO_(4)existed in the corrosion products.Pitting corrosion was the main corrosion style for the H70 brass and H80 brass,while general corrosion and pitting corrosion simultaneously dominated the corrosion process of the T2 copper in this environment.The results provide a new insight to the microbiological corrosion of copper alloys.
基金financial support for the research and for the publication costs of the articlesupported by Santa Catarina State Research Support Foundation(FAPESC)National Council for Scientific and Technological Development(CNPq no 302903/2023-2).
文摘Cement production,while essential for global infrastructure,contributes significantly to carbon dioxide emissions,accounting for approximately 7%of total emissions.To mitigate these environmental impacts,flash calcination of kaolinitic clays has been investigated as a sustainable alternative.This technique involves the rapid heating of clays,enabling their use as supplementary cementitious materials.The primary objective of this study was to modify the color of calcined clay in various atmospheres(oxidizing,inert,and reducing)to achieve a grayish tone similar to commercial cement while preserving its reactive properties.The experimental procedure employed a tubular reactor with precise control of gas flows(atmospheric air,nitrogen,and a carbon monoxide–nitrogen mixture).Physicochemical characterization of the raw clay was conducted before calcination,with analyses repeated on the calcined clays following experimentation.Results indicated that clay calcined in an oxidizing atmosphere acquired a reddish hue,attributed to the oxidation of iron in hematite.The Clay exhibited a pinkish tone in an inert atmosphere,while calcination in a reducing atmosphere yielded the desired grayish color.Regarding pozzolanic activity,clays calcined in oxidizing and inert atmospheres displayed robust strength,ranging from 82%to 87%.Calcination in a reducing atmosphere resulted in slightly lower strength,around 74%,likely due to the clay’s chemical composition and the calcination process,which affects compound formation and material reactivity.
基金financial support provided by Lehigh University,the Advanced Technology for Large Structural Systems(ATLSS)Engineering Research Center,and the Department of Structural Engineering at the University of California,San Diegolarge research team led by Professor Robert B.Fleischman under the project“NEESR:Inertial Force-Limiting Floor Anchorage Systems for Seismic Resistant Building Structures”with the support of grants from the National Science Foundation,award no.CMMI-1135033in the George E.Brown,Jr.Network for Earthquake gineering En-Simulation Research(NEESR)program and award no.CMMI-0402490 for the George E.Brown,Jr.Network for Earthquake ing Engineer-Simulation(NEES)consortium operations.
文摘This study numerically investigates the seismic response of a nine-story self-centering concentrically braced frame building incorporating force-limiting connections between the floor system and the lateral force-resisting system.Nonlinear earthquake simulations are conducted under design basis earthquake ground motions,and the results are compared against a baseline model with rigid-elastic connections.The study discusses connection design considerations and evaluates the effectiveness of force-limiting connections in mitigating higher-mode effects.The findings show that force-limiting connections significantly reduce the magnitude and variability of floor accelerations,brace forces,and connection forces,while maintaining comparable story drifts.limiting Force-connections primarily reduce the contribution of higher-mode responses,while the controlled rocking base mechanism modifies the first-mode response.Overall,the reduced dispersion in structural response improves the reliability of seismic design and enhances resilience by minimizing damage to both structural components and acceleration-sensitive nonstructural elements.
基金supported financially by the National Natural Science Foundation of China(52202434)the National Natural Science Foundation of Ningbo(2023J275).
文摘Natural gas is widely regarded as an efficient,relatively clean,and economically viable energy source.Its safe operation and continuous supply through pipeline infrastructure has led to its prominence in the energy sector.Methanol plays an important role in the natural gas industry,typically serving as a solvent or hydrate inhibitor.Therefore,the accurate estimation of thermodynamic properties for methane/methanol binary is extremely important to optimise the operating parameter,maximise the dehydration effect,and reduce the cost.As the Helmholtz energy equation of state is expected to offer high accuracy in predicting the vapour-liquid equilibrium of methane/methanol binary,four reducing parameters were derived based on collected experimental data.Additionally,the sensitivities of various reducing parameter combinations were simultaneously investigated.The results demonstrated a strong agreement between predicted fractions and experimental data,with the UMADs(uncertainty-weighted mean absolute deviation)of 3.484 and 0.665 for liquid and vapour phases,respectively.Meanwhile,it is deemed“very likely”,“likely”,and“unlikely”to achieve acceptable prediction for 3-parameter optimisation,2-parameter optimisation and,1-parameter optimisation,respectively.
基金the National Natural Science Foundation of China(Nos.21907080,22278330)Youth Innovative Team(No.xtr052022012)+3 种基金Fundamental Research Funds for the Central University(No.xzy012023010)from Xi’an Jiaotong Universitysupported by Natural Science Basic Research Program of Shaanxi(No.2023-JC-QN-0246)China/Shaanxi Postdoctoral Science Foundation(Nos.2023M732811,2023BSHEDZZ20)the University of Bath and the Open Research Fund of the School of Chemistry and Chemical Engineering,Henan Normal University(No.2020ZD01)for support。
文摘Redox dyshomeostasis is a critical factor in the initiation of numerous diseases,making the accurate evaluation of the redox status of the cellular environment an important aspect of physiological research.However,maintaining redox homeostasis relies on a complex and dynamic physiological system involving multiple substrate-enzyme interactions,so its accurately detection remains a challenge.With this research,we developed an activable fiuorescence switching platform by incorporating different conjugate acceptors to a fiuorophore using ester bonds and resulting in fiuorescence quenching due to donor-excited photo-induced electron transfer(d-Pe T),which was confirmed through density functional theory calculations.The reaction-based probe was deployed for recognizing all major intracellular reducing sulfur species(RSS),including H_(2)S,cysteine(Cys),homocysteine(Hcy),glutathione(GSH),and protein free thiols.The quenched fiuorescence was significantly recovered by RSS,through releasing the fiuorophore and diminishing the d-Pe T effect.Furthermore,the fiuorescent probe was used for the sensing and imaging RSS in living cells,demonstrating good cell-permeability,low cytotoxicity,and negative correlation with reactive oxygen species content,enabling the evaluating of global thiols redox state in Hep G2 cellular lines during ferroptosis processes.
文摘In the article“Silencing of the long non-coding RNA LINC00265 triggers autophagy and apoptosis in lung cancer by reducing protein stability of SIN3A oncogene”(Oncology Research.2024,Vol.32,No.7,pp.1185–1195.doi:10.32604/or.2023.030771,https://www.techscience.com/or/v32n7/57163),an inadvertent error occurred during the compilation of Fig.3H.This needed corrections to ensure the accuracy and integrity of the data presented.
