The degradation of titin could make the myofibrillar fragmentation to improve meat tenderization during postmortem.This study aimed to investigate effect of phosphorylation on titin degradation.Protein kinase A(PKA)an...The degradation of titin could make the myofibrillar fragmentation to improve meat tenderization during postmortem.This study aimed to investigate effect of phosphorylation on titin degradation.Protein kinase A(PKA)and alkaline phosphatase(AP)were added to crude titin extracted from ovine longissimus lumborum(LL)muscles.Phosphorylated/dephosphorylated titin were incubated withμ-calpain at 4℃ for 2 days.Results showed titin in AP group started degradation earlier than that in PKA and control groups.There were 20,16 and 12 phosphorylated sites identified by iTRAQ in the PKA,control and AP group,respectively.3D structure of dephosphorylated titin fragment was simulated and its molecular dynamics trajectory analysis was performed using Discovery StudioTM.The dihedral angle in AP group was less and the dephosphorylated fragment had a higher kinetic energy and total energy.We suggested that changes caused by AP treatment might make titin unstable,which easily degraded byμ-calpain.展开更多
This study was conducted on the analytic tree and got the fitting empirical equation of tree growth,in which the tree growth rate was used as the variable and time as the independent variable.The arithmetical operatio...This study was conducted on the analytic tree and got the fitting empirical equation of tree growth,in which the tree growth rate was used as the variable and time as the independent variable.The arithmetical operation to the function got the mature age of tree growth,and the expected mature age of Ailanthus altissima was 21 a.In addition,the application as well as the research direction and matters needing attention were proposed.展开更多
The so-called organic Rankine cycle(ORC)is an effective technology allowing heat recovery from lower temperature sources.In the present study,to improve its thermal efficiency,a preheated ejector using exhaust steam c...The so-called organic Rankine cycle(ORC)is an effective technology allowing heat recovery from lower temperature sources.In the present study,to improve its thermal efficiency,a preheated ejector using exhaust steam coming from the expander is integrated in the cycle(EPORC).Considering net power output,pump power,and thermal efficiency,the proposed system is compared with the basic ORC.The influence of the ejector ratio(ER)of the preheated ejector on the system performances is also investigated.Results show that the net power output of the EPORC is higher than that of the basic ORC due to the decreasing pump power.Under given working conditions,the average thermal efficiency of EPORC is 29%higher than that of ORC.The ER has a great impact on the performance of EPORC by adjusting the working fluid fed to the pump,leading to significant variations of the pump work Moreover,the ER has a remarkable effect on the working fluid temperature lift(TL)at the evaporator inlet,thus reducing the evaporator heat load.According to the results,the thermal efficiency of EPORC increases by 30%,when the ER increases from 0.05 to 0.4.展开更多
Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such ...Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age for Larix kaempferi was 46 years.And the application,research directions and precautions of the mature ages were proposed.展开更多
Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such ...Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age of Saliz matsudana was 21a.And the application,research directions and precautions of the mature ages were proposed.展开更多
Through the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable. The mature age of tree growth was obt...Through the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable. The mature age of tree growth was obtained through mathematical operations such as function derivation. The obtained expected maturity ages for the actual forests of Robinia pseudoacacia were 36,46 and 56 a,respectively,which could be the mature ages for commercial forest,protection forest and special-purpose forest. And the application,research directions and precautions of the mature ages were proposed.展开更多
Through the study of parse wood materials in Shandong Province,the fitting empirical equation of tree growth was obtained,a function with tree growth was a variable and time as an independent variable. Through mathema...Through the study of parse wood materials in Shandong Province,the fitting empirical equation of tree growth was obtained,a function with tree growth was a variable and time as an independent variable. Through mathematical operations such as function derivation,the mature age of tree growth was obtained. The obtained expected maturity age for Populus canadensis Moench forest was 11 a for pulp material,26 a for pillar materials and 41 a for peeler. And the application,research directions and precautions of the mature ages were proposed.展开更多
Empirical equations were used to fit tree growth through the analysis of parse wood data,functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According ...Empirical equations were used to fit tree growth through the analysis of parse wood data,functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According to arithmetical operations like derivation of the functions,the relative contribution rate of light to tree growth was 64. 8%,which was almost equal to the relative contribution rate of precipitation to tree growth. Therefore,the light and precipitation were of equal importance to tree growth.展开更多
This study was conducted on the analytic tree and got the fitting empirical equation of tree growth, in which the tree growth rate was used as the variable and time as the independent variable. The arithmetical operat...This study was conducted on the analytic tree and got the fitting empirical equation of tree growth, in which the tree growth rate was used as the variable and time as the independent variable. The arithmetical operation to the function got the mature age of tree growth, and the practical and ideal mature ages of Pinus densiflora were 58 and 123.5 a, respectively. In addition, the application research direction and matters needing attention were proposed.展开更多
Biogenic amine is one of the main categories of hazardous compounds in meat and meat products,making its detection methods vital for the assurance of edible safety.In this sense,many biogenic amine detection technique...Biogenic amine is one of the main categories of hazardous compounds in meat and meat products,making its detection methods vital for the assurance of edible safety.In this sense,many biogenic amine detection techniques such as chromatographic,electrophoretic,and electrochemical methods have been developed,which play an irreplaceable role in ensuring the safety of meat and meat products.Due to the increasing demand for fast and on-site detection techniques,visual detection methods have been gradually developed compared with non-visual methods such as chromatography and electrophoresis.Herein,we comprehensively review the mechanism and the latest progress of these biogenic amine detection methods;besides,we put forward the prospects for the future development of biogenic amine detection techniques,with a view to providing support for the establishment of more accurate and efficient detection,prevention and control strategies of biogenic amines.展开更多
基金financially supported by National Natural Science Foundation(32102035)the Agricultural Science and Technology Innovation Program(CAAS-ASTIP-2020-IFST-03)Central Public-interest Scientific Institution Basal Research(S2019RCJC01,S2020JBKY-16).
文摘The degradation of titin could make the myofibrillar fragmentation to improve meat tenderization during postmortem.This study aimed to investigate effect of phosphorylation on titin degradation.Protein kinase A(PKA)and alkaline phosphatase(AP)were added to crude titin extracted from ovine longissimus lumborum(LL)muscles.Phosphorylated/dephosphorylated titin were incubated withμ-calpain at 4℃ for 2 days.Results showed titin in AP group started degradation earlier than that in PKA and control groups.There were 20,16 and 12 phosphorylated sites identified by iTRAQ in the PKA,control and AP group,respectively.3D structure of dephosphorylated titin fragment was simulated and its molecular dynamics trajectory analysis was performed using Discovery StudioTM.The dihedral angle in AP group was less and the dephosphorylated fragment had a higher kinetic energy and total energy.We suggested that changes caused by AP treatment might make titin unstable,which easily degraded byμ-calpain.
文摘This study was conducted on the analytic tree and got the fitting empirical equation of tree growth,in which the tree growth rate was used as the variable and time as the independent variable.The arithmetical operation to the function got the mature age of tree growth,and the expected mature age of Ailanthus altissima was 21 a.In addition,the application as well as the research direction and matters needing attention were proposed.
基金This work was supported by the National Risk Assessment Laboratory of Agroproducts Processing Quality and Safety,Ministry of Agriculture and Rural Affairs(S2020KFKT-06).
文摘The so-called organic Rankine cycle(ORC)is an effective technology allowing heat recovery from lower temperature sources.In the present study,to improve its thermal efficiency,a preheated ejector using exhaust steam coming from the expander is integrated in the cycle(EPORC).Considering net power output,pump power,and thermal efficiency,the proposed system is compared with the basic ORC.The influence of the ejector ratio(ER)of the preheated ejector on the system performances is also investigated.Results show that the net power output of the EPORC is higher than that of the basic ORC due to the decreasing pump power.Under given working conditions,the average thermal efficiency of EPORC is 29%higher than that of ORC.The ER has a great impact on the performance of EPORC by adjusting the working fluid fed to the pump,leading to significant variations of the pump work Moreover,the ER has a remarkable effect on the working fluid temperature lift(TL)at the evaporator inlet,thus reducing the evaporator heat load.According to the results,the thermal efficiency of EPORC increases by 30%,when the ER increases from 0.05 to 0.4.
文摘Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age for Larix kaempferi was 46 years.And the application,research directions and precautions of the mature ages were proposed.
文摘Based on the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable.Through mathematical operations such as function derivation,the mature age of tree growth was obtained,and the obtained expected mature age of Saliz matsudana was 21a.And the application,research directions and precautions of the mature ages were proposed.
文摘Through the study of parse wood materials,the fitting empirical equation of tree growth was obtained,a function with tree growth as a variable and time as an independent variable. The mature age of tree growth was obtained through mathematical operations such as function derivation. The obtained expected maturity ages for the actual forests of Robinia pseudoacacia were 36,46 and 56 a,respectively,which could be the mature ages for commercial forest,protection forest and special-purpose forest. And the application,research directions and precautions of the mature ages were proposed.
文摘Through the study of parse wood materials in Shandong Province,the fitting empirical equation of tree growth was obtained,a function with tree growth was a variable and time as an independent variable. Through mathematical operations such as function derivation,the mature age of tree growth was obtained. The obtained expected maturity age for Populus canadensis Moench forest was 11 a for pulp material,26 a for pillar materials and 41 a for peeler. And the application,research directions and precautions of the mature ages were proposed.
文摘Empirical equations were used to fit tree growth through the analysis of parse wood data,functions with tree growth amount as the dependent variable and annual sunshine duration as the independent variable. According to arithmetical operations like derivation of the functions,the relative contribution rate of light to tree growth was 64. 8%,which was almost equal to the relative contribution rate of precipitation to tree growth. Therefore,the light and precipitation were of equal importance to tree growth.
文摘This study was conducted on the analytic tree and got the fitting empirical equation of tree growth, in which the tree growth rate was used as the variable and time as the independent variable. The arithmetical operation to the function got the mature age of tree growth, and the practical and ideal mature ages of Pinus densiflora were 58 and 123.5 a, respectively. In addition, the application research direction and matters needing attention were proposed.
基金This work was financially supported by the National Risk Assessment Laboratory of Agro-products Processing Quality and Safety,Ministry of Agriculture and Rural Affairs of the People’s Republic of China(S2021KFKT-14)the National Natural Science Foundation of China(32102079+2 种基金32072290)the Key Project of Zhejiang Provincial Natural Science Foundation of China(LZ22C200003)Zhejiang Provincial Department of Agriculture and Rural Affairs(2022SNJF020,2022SNJF069).
文摘Biogenic amine is one of the main categories of hazardous compounds in meat and meat products,making its detection methods vital for the assurance of edible safety.In this sense,many biogenic amine detection techniques such as chromatographic,electrophoretic,and electrochemical methods have been developed,which play an irreplaceable role in ensuring the safety of meat and meat products.Due to the increasing demand for fast and on-site detection techniques,visual detection methods have been gradually developed compared with non-visual methods such as chromatography and electrophoresis.Herein,we comprehensively review the mechanism and the latest progress of these biogenic amine detection methods;besides,we put forward the prospects for the future development of biogenic amine detection techniques,with a view to providing support for the establishment of more accurate and efficient detection,prevention and control strategies of biogenic amines.
