The amplitude-dependent and temperature-dependent low frequency damping capacities of magnesium with 99.96% purity were studied by a dynamic mechanical analyzer. The pure magnesium alloys include CPM1 and CPM2 casting...The amplitude-dependent and temperature-dependent low frequency damping capacities of magnesium with 99.96% purity were studied by a dynamic mechanical analyzer. The pure magnesium alloys include CPM1 and CPM2 castings having textures of columnar grains which extraordinarily influence the damping behaviours. The commercial pure magnesium alloy CPM was re-melted to obtain equiaxed grains, which could remove the effect of texture orientation on the damping behaviours of these pure magnesium alloys. The results of strain amplitude-dependent damping spectrums of these pure magnesium alloys show that the pure magnesium with equiaxed grains possesses the highest damping capacity. In temperature-dependent damping plot for all these three pure magnesium alloys, there are two damping peaks P1 and P2 located at 80 and 230 °C, respectively. These two damping peaks are considered to be caused by the interaction between dislocation and point defects, and the movement of grain boundaries, respectively.展开更多
With the growth of global protein demand and the development of plant-based foods,pea protein,as a low-allergenic,nutritionally balanced and environmentally friendly plant protein,has shown great potential in replacin...With the growth of global protein demand and the development of plant-based foods,pea protein,as a low-allergenic,nutritionally balanced and environmentally friendly plant protein,has shown great potential in replacing animal protein.Pea protein is mainly composed of globulin and albumin,with a protein content of 20%to 30%,and has a balanced amino acid composition,as well as being rich in minerals and dietary fiber.It also possesses good foaming,gelling,emulsifying and antioxidant functional properties.However,pea protein also has inherent defects that limit its application in the food industry.This article systematically reviews the extraction techniques,functional properties,modification methods and application fields of pea protein,and focuses on evaluating the effects of different extraction and modification strategies on protein yield and functional properties.Research shows that ultrasonic-assisted alkaline extraction can reduce solvent usage by 55%,shorten extraction time by 50%,and increase extraction rate by 12.51%;under optimized conditions,ultrafiltration membrane technology can achieve a protein purity of 91%.In terms of modification,ultrasonic treatment increases foaming capacity by 37.4%,and phenolic cross-linking increases gel strength from 3.0 kPa to 48 kPa.This article provides data support and theoretical reference for the efficient extraction and functional optimization of pea protein,and has promoting significance for its wide application in plant-based foods.展开更多
Micro-sized anatase TiO_(2) displays inferior capacity as cathode material for magnesium ion batteries because of the higher diffusion energy barrier of Mg^(2+)in anatase TiO_(2) lattice.Herein,we report that nanosize...Micro-sized anatase TiO_(2) displays inferior capacity as cathode material for magnesium ion batteries because of the higher diffusion energy barrier of Mg^(2+)in anatase TiO_(2) lattice.Herein,we report that nanosized anatase TiO_(2) exposed(001)facet doubles the capacity compared to the micro-sized sample ascribed to the interfacial Mg^(2+)ion storage.First-principles calculations reveal that the diffusion energy barrier of Mg^(2+)on the(001)facet is significantly lower than those in the bulk phase and on(100)facet,and the adsorption energy of Mg^(2+)on the(001)facet is also considerably lower than that on(100)facet,which guarantees superior interfacial Mg^(2+)storage of(001)facet.Moreover,anatase TiO_(2) exposed(001)facet displays a significantly higher capacity of 312.9 mAh g^(−1) in Mg-Li dual-salt electrolyte compared to 234.3 mAh g^(−1) in Li salt electrolyte.The adsorption energies of Mg^(2+)on(001)facet are much lower than the adsorption energies of Li+on(001)facet,implying that the Mg^(2+)ion interfacial storage is more favorable.These results highlight that controlling the crystal facet of the nanocrystals effectively enhances the interfacial storage of multivalent ions.This work offers valuable guidance for the rational design of high-capacity storage systems.展开更多
背景全科医学作为一种新兴医疗模式,强调以社区为基础的全面医疗服务,旨在提高医疗的可及性和效率。然而,尽管全科医学在提升基本医疗卫生服务能力中扮演关键角色,但全科医学研究仍处于发展滞后的状态,需要通过科学研究和社会支持来改...背景全科医学作为一种新兴医疗模式,强调以社区为基础的全面医疗服务,旨在提高医疗的可及性和效率。然而,尽管全科医学在提升基本医疗卫生服务能力中扮演关键角色,但全科医学研究仍处于发展滞后的状态,需要通过科学研究和社会支持来改善这一状况,并提高其学科地位。目的在研究人员、科研机构和学科整体三个自下而上的层级中,分层次地分析影响全科医学领域科研能力发展的因素。方法于2023年12月—2024年3月,本文采用范围综述方法,对中国知网、万方数据知识服务平台、PubMed、Web of Science数据库进行检索,并手动浏览国际全科医学科研和行业学会的信息发布平台,以及谷歌搜索引擎,收集2000—2023年发表的全科医学科研能力发展影响因素的相关文献,并通过手动检索补充灰色文献。通过两阶段的筛选,最终纳入相关文献,使用Excel进行数据整理,归类影响因素,并通过归纳性的主题分析法分析数据,最终以日冕图的形式展示研究结果。结果本研究最终纳入122篇文献,包括原创研究62篇、系统综述2篇、非原创论文54篇、灰色文献4篇,基于文献分析,共归纳出21项影响全科医学科研能力发展的因素。相关因素被分为个体(研究人员)、群体(机构)和整体(学科)三个层级。个体层面的因素涉及研究人员的科研知识和技能、申请资金的能力、对科研的兴趣和积极性、学习科研知识和发展科研合作的机遇、用于科研工作的时间以及科研和临床工作的结合情况;群体层面的因素涉及科研机构的科研人力、科研资源、科研环境、科研管理机制、科研培训能力、外部科研合作资源和机构管理者的重视程度;学科层面的因素则涉及学科的科研特点、核心的科研和协调机构、政府、学协会、学术期刊和国际合作者的外部影响,以及科研经费等方面。结论本研究综述了全球范围内关于全科医学科研能力发展的文献,识别出21个关键的影响因素。在我国的实际环境中,上述因素可能会集中表现为学科组织分散、总体资源有限、学科理论不清、社会认知不足等一系列相互影响的问题。这要求该领域的研究者更加主动地以学科核心理念为导向,对机构的科研绩效导向和管理机制,以及个人的科研领域和路径进行合理的调整和重塑,并增强对全科医生具有全科医学学科特色的科研理论、方法和能力的培养,以增强形成学科合力的基础。展开更多
基金Project (50801017) supported by the National Natural Science Foundation of Chinaproject (20080440843) supported by Postdoctoral Science Foundation, ChinaProject (HIT.NSRIF.2009028) supported by the Natural Scientific Research Innovation Foundation of Harbin Institute of Technology, China
文摘The amplitude-dependent and temperature-dependent low frequency damping capacities of magnesium with 99.96% purity were studied by a dynamic mechanical analyzer. The pure magnesium alloys include CPM1 and CPM2 castings having textures of columnar grains which extraordinarily influence the damping behaviours. The commercial pure magnesium alloy CPM was re-melted to obtain equiaxed grains, which could remove the effect of texture orientation on the damping behaviours of these pure magnesium alloys. The results of strain amplitude-dependent damping spectrums of these pure magnesium alloys show that the pure magnesium with equiaxed grains possesses the highest damping capacity. In temperature-dependent damping plot for all these three pure magnesium alloys, there are two damping peaks P1 and P2 located at 80 and 230 °C, respectively. These two damping peaks are considered to be caused by the interaction between dislocation and point defects, and the movement of grain boundaries, respectively.
文摘With the growth of global protein demand and the development of plant-based foods,pea protein,as a low-allergenic,nutritionally balanced and environmentally friendly plant protein,has shown great potential in replacing animal protein.Pea protein is mainly composed of globulin and albumin,with a protein content of 20%to 30%,and has a balanced amino acid composition,as well as being rich in minerals and dietary fiber.It also possesses good foaming,gelling,emulsifying and antioxidant functional properties.However,pea protein also has inherent defects that limit its application in the food industry.This article systematically reviews the extraction techniques,functional properties,modification methods and application fields of pea protein,and focuses on evaluating the effects of different extraction and modification strategies on protein yield and functional properties.Research shows that ultrasonic-assisted alkaline extraction can reduce solvent usage by 55%,shorten extraction time by 50%,and increase extraction rate by 12.51%;under optimized conditions,ultrafiltration membrane technology can achieve a protein purity of 91%.In terms of modification,ultrasonic treatment increases foaming capacity by 37.4%,and phenolic cross-linking increases gel strength from 3.0 kPa to 48 kPa.This article provides data support and theoretical reference for the efficient extraction and functional optimization of pea protein,and has promoting significance for its wide application in plant-based foods.
基金supported by the National Key R&D Program of China(No.2023YFB3809500)the Fundamental Research Funds for the Central Universities(No.2024CDJXY003)+1 种基金the Venture&Innovation Support Program for Chongqing Overseas Returnees(cx2023087)The Chongqing Technology Innovation and Application Development Project(No.2024TIAD-KPX0003).
文摘Micro-sized anatase TiO_(2) displays inferior capacity as cathode material for magnesium ion batteries because of the higher diffusion energy barrier of Mg^(2+)in anatase TiO_(2) lattice.Herein,we report that nanosized anatase TiO_(2) exposed(001)facet doubles the capacity compared to the micro-sized sample ascribed to the interfacial Mg^(2+)ion storage.First-principles calculations reveal that the diffusion energy barrier of Mg^(2+)on the(001)facet is significantly lower than those in the bulk phase and on(100)facet,and the adsorption energy of Mg^(2+)on the(001)facet is also considerably lower than that on(100)facet,which guarantees superior interfacial Mg^(2+)storage of(001)facet.Moreover,anatase TiO_(2) exposed(001)facet displays a significantly higher capacity of 312.9 mAh g^(−1) in Mg-Li dual-salt electrolyte compared to 234.3 mAh g^(−1) in Li salt electrolyte.The adsorption energies of Mg^(2+)on(001)facet are much lower than the adsorption energies of Li+on(001)facet,implying that the Mg^(2+)ion interfacial storage is more favorable.These results highlight that controlling the crystal facet of the nanocrystals effectively enhances the interfacial storage of multivalent ions.This work offers valuable guidance for the rational design of high-capacity storage systems.
文摘背景全科医学作为一种新兴医疗模式,强调以社区为基础的全面医疗服务,旨在提高医疗的可及性和效率。然而,尽管全科医学在提升基本医疗卫生服务能力中扮演关键角色,但全科医学研究仍处于发展滞后的状态,需要通过科学研究和社会支持来改善这一状况,并提高其学科地位。目的在研究人员、科研机构和学科整体三个自下而上的层级中,分层次地分析影响全科医学领域科研能力发展的因素。方法于2023年12月—2024年3月,本文采用范围综述方法,对中国知网、万方数据知识服务平台、PubMed、Web of Science数据库进行检索,并手动浏览国际全科医学科研和行业学会的信息发布平台,以及谷歌搜索引擎,收集2000—2023年发表的全科医学科研能力发展影响因素的相关文献,并通过手动检索补充灰色文献。通过两阶段的筛选,最终纳入相关文献,使用Excel进行数据整理,归类影响因素,并通过归纳性的主题分析法分析数据,最终以日冕图的形式展示研究结果。结果本研究最终纳入122篇文献,包括原创研究62篇、系统综述2篇、非原创论文54篇、灰色文献4篇,基于文献分析,共归纳出21项影响全科医学科研能力发展的因素。相关因素被分为个体(研究人员)、群体(机构)和整体(学科)三个层级。个体层面的因素涉及研究人员的科研知识和技能、申请资金的能力、对科研的兴趣和积极性、学习科研知识和发展科研合作的机遇、用于科研工作的时间以及科研和临床工作的结合情况;群体层面的因素涉及科研机构的科研人力、科研资源、科研环境、科研管理机制、科研培训能力、外部科研合作资源和机构管理者的重视程度;学科层面的因素则涉及学科的科研特点、核心的科研和协调机构、政府、学协会、学术期刊和国际合作者的外部影响,以及科研经费等方面。结论本研究综述了全球范围内关于全科医学科研能力发展的文献,识别出21个关键的影响因素。在我国的实际环境中,上述因素可能会集中表现为学科组织分散、总体资源有限、学科理论不清、社会认知不足等一系列相互影响的问题。这要求该领域的研究者更加主动地以学科核心理念为导向,对机构的科研绩效导向和管理机制,以及个人的科研领域和路径进行合理的调整和重塑,并增强对全科医生具有全科医学学科特色的科研理论、方法和能力的培养,以增强形成学科合力的基础。
