Quality changes in ready-to-eat,shelf-stable foods,during storage can be influenced by many factors,such as processing,storage conditions,and the barrier properties of the packaging.This research investigated retentio...Quality changes in ready-to-eat,shelf-stable foods,during storage can be influenced by many factors,such as processing,storage conditions,and the barrier properties of the packaging.This research investigated retention of vitamin C and anthocyanin in purple mashed potatoes as influenced by packaging barrier properties and encapsulation during storage after microwave assisted thermal sterilization.Purple mashed potatoes fortified with encapsulated(EVC)or non-encapsulated vitamin C(NVC)were packaged in two high-barrier polymer pouches(TLMO and PAA),processed with a pilot-scale microwave assisted thermal sterilization(MATS)system(F0=10.7 min),and stored at 37.8°C for 7 months.MATS processing caused a significant increase(P<0.05)in the oxygen transmission rates(OTRs)of PAA pouches but did not affect the barrier properties of TLMO pouches.PAA film also had a significantly higher(P<0.05)water vapor transmission rate(WVTRs)than TLMO films,which resulted in a significantly higher(P<0.05)weight loss in the samples packaged in PAA pouches than TLMO pouches.Purple mashed potatoes containing encapsulated vitamin C in both TLMO and PAA pouches showed the highest retention over 2 months of storage at 37.8°C than non-encapsulated vitamin C.Additionally,purple mashed potatoes exposed to 700 lumens light showed a significantly higher(P<0.05)deterioration in the anthocyanin,total phenolic content,color,and vitamin C.Overall,MATS processed purple mashed potatoes in high barrier polymeric packaging can minimize the quality changes when stored in dark conditions during storage and have an extended shelf life.展开更多
Economic benefits of land use in Feidong,Wenji,Dashu and Wuzhuang service stations at Hefei-Nanjing Expressway were analyzed from total output value of unit land and the tertiary industry added value of unit land.Resu...Economic benefits of land use in Feidong,Wenji,Dashu and Wuzhuang service stations at Hefei-Nanjing Expressway were analyzed from total output value of unit land and the tertiary industry added value of unit land.Results indicate that economic benefits of land use in Hefei-Nanjing Expressway service stations are lower than average economic benefits of urban land use in Anhui Province.Through analyzing existing problems in land use and operation and management of service stations,it came up with recommendations for increasing economic benefits of land use in Hefei-Nanjing Expressway service stations.展开更多
This paper is concerned with the existence and asymptotical behavior of positive ground state solutions for a class of critical quasilinear Schrodinger equation.By using a change of variables and variational argument,...This paper is concerned with the existence and asymptotical behavior of positive ground state solutions for a class of critical quasilinear Schrodinger equation.By using a change of variables and variational argument,we prove the existence of positive ground state solution and discuss their asymptotical behavior。展开更多
基金Funding for this study was provided by USDA National Institute of Food and Agriculture Research grants 2016-67017‐24597,2016-68003-24840Hatch project#1016366.The authors would like to convey their appreciation and gratitude to the polymer companies for supplying the film pouches.
文摘Quality changes in ready-to-eat,shelf-stable foods,during storage can be influenced by many factors,such as processing,storage conditions,and the barrier properties of the packaging.This research investigated retention of vitamin C and anthocyanin in purple mashed potatoes as influenced by packaging barrier properties and encapsulation during storage after microwave assisted thermal sterilization.Purple mashed potatoes fortified with encapsulated(EVC)or non-encapsulated vitamin C(NVC)were packaged in two high-barrier polymer pouches(TLMO and PAA),processed with a pilot-scale microwave assisted thermal sterilization(MATS)system(F0=10.7 min),and stored at 37.8°C for 7 months.MATS processing caused a significant increase(P<0.05)in the oxygen transmission rates(OTRs)of PAA pouches but did not affect the barrier properties of TLMO pouches.PAA film also had a significantly higher(P<0.05)water vapor transmission rate(WVTRs)than TLMO films,which resulted in a significantly higher(P<0.05)weight loss in the samples packaged in PAA pouches than TLMO pouches.Purple mashed potatoes containing encapsulated vitamin C in both TLMO and PAA pouches showed the highest retention over 2 months of storage at 37.8°C than non-encapsulated vitamin C.Additionally,purple mashed potatoes exposed to 700 lumens light showed a significantly higher(P<0.05)deterioration in the anthocyanin,total phenolic content,color,and vitamin C.Overall,MATS processed purple mashed potatoes in high barrier polymeric packaging can minimize the quality changes when stored in dark conditions during storage and have an extended shelf life.
基金Supported by Research Project of Anhui Provincial Expressway Land Use and Management Mode(AHGS2011-11)
文摘Economic benefits of land use in Feidong,Wenji,Dashu and Wuzhuang service stations at Hefei-Nanjing Expressway were analyzed from total output value of unit land and the tertiary industry added value of unit land.Results indicate that economic benefits of land use in Hefei-Nanjing Expressway service stations are lower than average economic benefits of urban land use in Anhui Province.Through analyzing existing problems in land use and operation and management of service stations,it came up with recommendations for increasing economic benefits of land use in Hefei-Nanjing Expressway service stations.
基金This work was supported in part by the National Natural Science Foundation of China(Grant Nos.11571040,11671331).
文摘This paper is concerned with the existence and asymptotical behavior of positive ground state solutions for a class of critical quasilinear Schrodinger equation.By using a change of variables and variational argument,we prove the existence of positive ground state solution and discuss their asymptotical behavior。
