The separator is an essential component of sodium-ion batteries(SIBs)to determine their electrochemical performances.However,the separator with high mechanical strength,good electrolyte wettability and excellent elect...The separator is an essential component of sodium-ion batteries(SIBs)to determine their electrochemical performances.However,the separator with high mechanical strength,good electrolyte wettability and excellent electrochemical performance remains an open challenge.Herein,a new separator consisting of amphoteric nanofibers with abundant functional groups was fabricated through supramolecular assembly of natural polymers for SIB.The uniform nanoporous structure,remarkable mechanical properties and abundant functional groups(e.g.-COOH,-NH_(2)and-OH)endow the separator with lower dissolution activation energy and higher ion migration numbers.These metrics enable the separator to lower the barrier for desolvation of Na^(+),accelerate the migration of Na^(+),and generate more stable solid electrolyte interphase(SEI)and cathode electrolyte interphase(CEI).The battery assembled with the amphoteric nanofiber separator shows higher specific capacity and better stability than that assembled with glass fiber(GF)separator.展开更多
The alteration in surface color of metallic glasses(MGs)holds great significance in the context of microstructuredesign and commercial utility.It is essential to accurately describe the structures that are formed duri...The alteration in surface color of metallic glasses(MGs)holds great significance in the context of microstructuredesign and commercial utility.It is essential to accurately describe the structures that are formed during the laser and colorseparation processes in order to develop practical laser coloring applications.Due to the high oxidation sensitivity of Labasedmetallic glass,it can broaden the color range but make it more complex.Structure coloring by laser processing on thesurface of La-based metallic glass can be conducted after thermoplastic forming.It is particularly important to clarify therole of structure and composition in the surface coloring process.The aim is to study the relationship between amorphoussurface structural color,surface geometry,and oxide formation by laser processing in metallic glasses.The findings revealedthat the periodic structure primarily determines the surface color at laser energy densities below 1.0 J/mm^(2).In contrast,thesurface color predominantly depends on the proportion of oxides that are formed when energy densities exceed 1.0 J/mm^(2).Consequently,this study provides a novel concept for the fundamental investigation of laser coloring and establishes a newavenue for practical application.展开更多
该课题研究了一种新型雾化喷淋-立体通风的宰前静养装置对肉鸡夏季运输后肉质的影响。共分为以下2个处理:1)运输组(transport and rest, TR),45 min运输,1 h休息;2)雾化喷淋-立体通风组(transport followed water-misting sprays and th...该课题研究了一种新型雾化喷淋-立体通风的宰前静养装置对肉鸡夏季运输后肉质的影响。共分为以下2个处理:1)运输组(transport and rest, TR),45 min运输,1 h休息;2)雾化喷淋-立体通风组(transport followed water-misting sprays and three-dimensional forced ventilation, TWFR),45 min运输,15 min雾化喷淋-立体通风,45 min休息。与TR组相比,TWFR处理显著地提高了肉鸡的pH24值(24 h)(P<0.05)。TWFR处理也显著降低了鸡肉的滴水损失和蒸煮损失(P<0.05),这种作用与明显降低的核磁共振T21弛豫时间和显著较高的拉曼光谱酪氨酸双峰(I850/I830)比值(P<0.05)有关。TWFR和TR处理后的肉拉曼光谱的α-螺旋和β-折叠含量呈现显著差异(P<0.05),这种差异可归因于宰前静养措施引起的蛋白质构象的变化。本研究表明,雾化喷淋-立体通风是夏季肉鸡屠宰中一种有效的肉质保证技术。展开更多
快速增长和肌肉增生型肉鸡品种选育导致大量异质鸡胸肉的产生。其中,类PSE(Pale soft and exudative-like meat)肉由于颜色苍白、质软、渗出率高严重影响消费者购买欲望,且由于蛋白变性导致的加工特性差、出品率低等问题给肉类加工业造...快速增长和肌肉增生型肉鸡品种选育导致大量异质鸡胸肉的产生。其中,类PSE(Pale soft and exudative-like meat)肉由于颜色苍白、质软、渗出率高严重影响消费者购买欲望,且由于蛋白变性导致的加工特性差、出品率低等问题给肉类加工业造成巨大损失。宰前应激会刺激动物机体神经-内分泌系统,影响免疫系统和生理代谢功能,造成宰后初期肌肉生理生化失调,也会对肉品质产生影响。本文旨在综述高温运输诱导类PSE肉的发生机制,探讨高温运输应激对肉鸡应激反应、能量代谢、氧化还原状态、钙离子通道蛋白和热休克蛋白70的影响,以期为改善肉鸡福利和降低类PSE肉的发生提供理论指导。展开更多
基金supported by the Outstanding Youth Team Project of Guangdong Natural Science Foundation(2023B1515040013)Guangdong Basic and Applied Basic Research Foundation(2023A1515012215,2023B1515040013,2023A1515012519)+1 种基金State Key Laboratory of Pulp&Paper Engineering(2023C07,2023PY03)Guangdong Col ege Students’Scientific and Technological Innovation(“Climbing Program”Special Fund,Pdjh2022a0026)
文摘The separator is an essential component of sodium-ion batteries(SIBs)to determine their electrochemical performances.However,the separator with high mechanical strength,good electrolyte wettability and excellent electrochemical performance remains an open challenge.Herein,a new separator consisting of amphoteric nanofibers with abundant functional groups was fabricated through supramolecular assembly of natural polymers for SIB.The uniform nanoporous structure,remarkable mechanical properties and abundant functional groups(e.g.-COOH,-NH_(2)and-OH)endow the separator with lower dissolution activation energy and higher ion migration numbers.These metrics enable the separator to lower the barrier for desolvation of Na^(+),accelerate the migration of Na^(+),and generate more stable solid electrolyte interphase(SEI)and cathode electrolyte interphase(CEI).The battery assembled with the amphoteric nanofiber separator shows higher specific capacity and better stability than that assembled with glass fiber(GF)separator.
基金supported by the National Natural Science Foundation of China(Grant Nos.52071222 and 52471180)Guangdong Major Project of Basic and Applied Basic Research,China(Grant No.2019B030302010)+2 种基金Guangdong Basic and Applied Basic Research,China(Grant No.2020B1515130007)the National Key Research and Development Program of China(Grant No.2021YFA0716302)the Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDB30000000).
文摘The alteration in surface color of metallic glasses(MGs)holds great significance in the context of microstructuredesign and commercial utility.It is essential to accurately describe the structures that are formed during the laser and colorseparation processes in order to develop practical laser coloring applications.Due to the high oxidation sensitivity of Labasedmetallic glass,it can broaden the color range but make it more complex.Structure coloring by laser processing on thesurface of La-based metallic glass can be conducted after thermoplastic forming.It is particularly important to clarify therole of structure and composition in the surface coloring process.The aim is to study the relationship between amorphoussurface structural color,surface geometry,and oxide formation by laser processing in metallic glasses.The findings revealedthat the periodic structure primarily determines the surface color at laser energy densities below 1.0 J/mm^(2).In contrast,thesurface color predominantly depends on the proportion of oxides that are formed when energy densities exceed 1.0 J/mm^(2).Consequently,this study provides a novel concept for the fundamental investigation of laser coloring and establishes a newavenue for practical application.
文摘快速增长和肌肉增生型肉鸡品种选育导致大量异质鸡胸肉的产生。其中,类PSE(Pale soft and exudative-like meat)肉由于颜色苍白、质软、渗出率高严重影响消费者购买欲望,且由于蛋白变性导致的加工特性差、出品率低等问题给肉类加工业造成巨大损失。宰前应激会刺激动物机体神经-内分泌系统,影响免疫系统和生理代谢功能,造成宰后初期肌肉生理生化失调,也会对肉品质产生影响。本文旨在综述高温运输诱导类PSE肉的发生机制,探讨高温运输应激对肉鸡应激反应、能量代谢、氧化还原状态、钙离子通道蛋白和热休克蛋白70的影响,以期为改善肉鸡福利和降低类PSE肉的发生提供理论指导。
