自人民币汇率形成机制改革以来,人民币汇率的波动幅度显著增加,由汇率波动带来的非预期损失成为汇率风险的重要部分。本文引入T A R C H模型来度量汇率波动性并用于计量汇率风险VaR。实证分析显示:TARCH模型能有效反映美元、欧元和日元...自人民币汇率形成机制改革以来,人民币汇率的波动幅度显著增加,由汇率波动带来的非预期损失成为汇率风险的重要部分。本文引入T A R C H模型来度量汇率波动性并用于计量汇率风险VaR。实证分析显示:TARCH模型能有效反映美元、欧元和日元汇率时间序列的波动聚集效应,特别是杠杆效应项充分揭示了三项外汇杠杆效应的差异;基于TA RCH模型计量的汇率风险V a R也能有效覆盖美元、欧元和日元的下端风险,因此TARCH-VaR方法是度量汇率风险的科学工具。展开更多
针对新建商住楼直击雷防护设计工作量大，建筑天面复杂、多变的特点，以TArch6 for R15为设计平台，建立一个包含防雷符号及文字标注的图框文件；在具体的设计中，结合绘图和修改、图层与线形等工具的运用，分别阐述了基础地网、均压环...针对新建商住楼直击雷防护设计工作量大，建筑天面复杂、多变的特点，以TArch6 for R15为设计平台，建立一个包含防雷符号及文字标注的图框文件；在具体的设计中，结合绘图和修改、图层与线形等工具的运用，分别阐述了基础地网、均压环及天面避雷带的设计要点及绘图思路；在进行大批量商住楼设计时，强调留心对比与观察能使设计工作事半功倍。展开更多
Enzyme based starch modification has attracted much attention form recent years due to formation various functional derivatives with novel processing and functional properties such as resistant to digestion,thermosrev...Enzyme based starch modification has attracted much attention form recent years due to formation various functional derivatives with novel processing and functional properties such as resistant to digestion,thermosreversible gel formation,etc.It has emerges as a promising method due to their high specificity,safety,and eco-friendly nature.Starch-modifying enzymes hydrolyse or form glycosidic bonds causing alteration in the amylose/amylopectin ratio,molecular weight and distribution of branch chain-length that has reduced limitation possessed by NSs i.e.,low water-holding capacity,insolubility,syneresis retrogradation,etc.The review delves into the key enzymes used for modifying starch,affecting the structural and functional properties of starch.These alteration in starch properties provide guidelines in designing a new starch-based products with desired structure and properties for the food industry.展开更多
Antimicrobial resistance is becoming a serious public health problem that needs to be eradicated.In this context,the use of natural sources with antimicrobial properties is proposed as an alternative to conventional s...Antimicrobial resistance is becoming a serious public health problem that needs to be eradicated.In this context,the use of natural sources with antimicrobial properties is proposed as an alternative to conventional synthetic antimicrobials,thus avoiding their adverse effects.To improve the controlled and targeted release of these compounds,it is essential to incorporate them into matrices,which in turn improves their stability and bioac-tivity.Starch-based matrices as carriers of antimicrobial compounds have shown great potential in many ap-plications,especially in active packaging for food safety.This review examines recent advances in the use of these matrices,highlighting natural sources with antimicrobial properties and starch types such as corn,cassava,and modified starch,the latter being particularly relevant for its improved solubility properties and functionality.Starch plays a crucial role in improving the stability and solubility of antimicrobial compounds,and the controlled release depends on the structure of the starch and on the properties of the environment.In food packaging,starch-based films loaded with antimicrobials are effective in inhibiting bacterial growth and extending shelf life.The applications of the bioactive compounds combined with starch matrices,such as plant extracts and essential oils,are also analyzed,providing a sustainable solution to antimicrobial resistance.This analysis highlights the advantages and potential of starch matrices in the development of antimicrobial controlled release systems.展开更多
文摘自人民币汇率形成机制改革以来,人民币汇率的波动幅度显著增加,由汇率波动带来的非预期损失成为汇率风险的重要部分。本文引入T A R C H模型来度量汇率波动性并用于计量汇率风险VaR。实证分析显示:TARCH模型能有效反映美元、欧元和日元汇率时间序列的波动聚集效应,特别是杠杆效应项充分揭示了三项外汇杠杆效应的差异;基于TA RCH模型计量的汇率风险V a R也能有效覆盖美元、欧元和日元的下端风险,因此TARCH-VaR方法是度量汇率风险的科学工具。
文摘针对新建商住楼直击雷防护设计工作量大，建筑天面复杂、多变的特点，以TArch6 for R15为设计平台，建立一个包含防雷符号及文字标注的图框文件；在具体的设计中，结合绘图和修改、图层与线形等工具的运用，分别阐述了基础地网、均压环及天面避雷带的设计要点及绘图思路；在进行大批量商住楼设计时，强调留心对比与观察能使设计工作事半功倍。
基金the financial support from SERB as JC Bose Fellowship grant.
文摘Enzyme based starch modification has attracted much attention form recent years due to formation various functional derivatives with novel processing and functional properties such as resistant to digestion,thermosreversible gel formation,etc.It has emerges as a promising method due to their high specificity,safety,and eco-friendly nature.Starch-modifying enzymes hydrolyse or form glycosidic bonds causing alteration in the amylose/amylopectin ratio,molecular weight and distribution of branch chain-length that has reduced limitation possessed by NSs i.e.,low water-holding capacity,insolubility,syneresis retrogradation,etc.The review delves into the key enzymes used for modifying starch,affecting the structural and functional properties of starch.These alteration in starch properties provide guidelines in designing a new starch-based products with desired structure and properties for the food industry.
基金supported by the Ministerio de Economía y Com-petitividad(MINECO,Spain),under Grants PID2020-119087RB-I00 and MCINN-24-PID2023-149453OB-I00co-financed by Agen-cia de Ciencia,Competitividad Empresarial e Innovaccion Asturiana-SEKUENS(SEK-25-GRU-GIC-24-079)。
文摘Antimicrobial resistance is becoming a serious public health problem that needs to be eradicated.In this context,the use of natural sources with antimicrobial properties is proposed as an alternative to conventional synthetic antimicrobials,thus avoiding their adverse effects.To improve the controlled and targeted release of these compounds,it is essential to incorporate them into matrices,which in turn improves their stability and bioac-tivity.Starch-based matrices as carriers of antimicrobial compounds have shown great potential in many ap-plications,especially in active packaging for food safety.This review examines recent advances in the use of these matrices,highlighting natural sources with antimicrobial properties and starch types such as corn,cassava,and modified starch,the latter being particularly relevant for its improved solubility properties and functionality.Starch plays a crucial role in improving the stability and solubility of antimicrobial compounds,and the controlled release depends on the structure of the starch and on the properties of the environment.In food packaging,starch-based films loaded with antimicrobials are effective in inhibiting bacterial growth and extending shelf life.The applications of the bioactive compounds combined with starch matrices,such as plant extracts and essential oils,are also analyzed,providing a sustainable solution to antimicrobial resistance.This analysis highlights the advantages and potential of starch matrices in the development of antimicrobial controlled release systems.
