Auto cascade refrigeration(ACR) cycle with phase separators is widely used in the cryogenic system. The composition of mixed refrigerant has a great effect on the performance of the system. Based on the assumption of ...Auto cascade refrigeration(ACR) cycle with phase separators is widely used in the cryogenic system. The composition of mixed refrigerant has a great effect on the performance of the system. Based on the assumption of infinite volume of phase separator, ACR system with one phase separator is simulated in this paper. The variation of refrigerant composition under different valves opening is obtained. A related experimental system is set up to verify the variation. The result shows that when the valve opening connected to the evaporator increases or the valve opening under the phase separator decreases, the low-boiling component concentration of the working mixture passing through the compressor and condenser increases, while the high-boiling component concentration decreases. Furthermore, the variations of condensation pressure and evaporation pressure under different valves opening are also observed. This paper is helpful to deepen the understanding of ACR system.展开更多
Gastric cancer(GC)is one of the most common cancers worldwide particularly in Asian populations,and certain diets have been associated with increased risk of GC.Recent advances in microbial profiling technology have f...Gastric cancer(GC)is one of the most common cancers worldwide particularly in Asian populations,and certain diets have been associated with increased risk of GC.Recent advances in microbial profiling technology have facilitated investigations on microbes residing on the gastric mucosa and increasing evidence has revealed the critical roles of non-Helicobacter pylori gastric microbes in gastric tumorigenesis.On the other hand,diets can affect microbial communities,causing compositional and functional shift of the microbiota.In this review,we summarize the influence of various diets including processed meat,salt-preserved food,high-fat diet,and alcohol on the development and progression of GC.We also explore microbial metabolites and host-microbe interactions in gastric tumorigenesis,alongside dietary interventions targeting the microbiota for the prevention and management against GC.展开更多
基金Supported by the China Postdoctoral Science Foundation(2014M552195)the State Key Laboratory Foundation of Subtropical Building,South China University of Technology(2013ZC13)the Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization,South China University of Technology(2013A061401005)
文摘Auto cascade refrigeration(ACR) cycle with phase separators is widely used in the cryogenic system. The composition of mixed refrigerant has a great effect on the performance of the system. Based on the assumption of infinite volume of phase separator, ACR system with one phase separator is simulated in this paper. The variation of refrigerant composition under different valves opening is obtained. A related experimental system is set up to verify the variation. The result shows that when the valve opening connected to the evaporator increases or the valve opening under the phase separator decreases, the low-boiling component concentration of the working mixture passing through the compressor and condenser increases, while the high-boiling component concentration decreases. Furthermore, the variations of condensation pressure and evaporation pressure under different valves opening are also observed. This paper is helpful to deepen the understanding of ACR system.
基金supported by the Noncommunicable Chronic Diseases-National Science and Technology Major Project(2023ZD0500200)the RGC Collaborative Research Fund(C4008-23W)+3 种基金RGC Research Impact Fund Hong Kong(R4032-21F)Strategic Seed Funding Collaboration Research Scheme CUHK(3133344)Strategic Impact Enhancement Fund CUHK(3135509)Impact Case for RAE CUHK(3134277).
文摘Gastric cancer(GC)is one of the most common cancers worldwide particularly in Asian populations,and certain diets have been associated with increased risk of GC.Recent advances in microbial profiling technology have facilitated investigations on microbes residing on the gastric mucosa and increasing evidence has revealed the critical roles of non-Helicobacter pylori gastric microbes in gastric tumorigenesis.On the other hand,diets can affect microbial communities,causing compositional and functional shift of the microbiota.In this review,we summarize the influence of various diets including processed meat,salt-preserved food,high-fat diet,and alcohol on the development and progression of GC.We also explore microbial metabolites and host-microbe interactions in gastric tumorigenesis,alongside dietary interventions targeting the microbiota for the prevention and management against GC.
