The evaporator is the main part of a quick-freeze equipment. There are many factors influencing the heat transfer coefficient of an evaporator. The most important factors among them are the fin shape, tube diameter, d...The evaporator is the main part of a quick-freeze equipment. There are many factors influencing the heat transfer coefficient of an evaporator. The most important factors among them are the fin shape, tube diameter, distance of fin space, frost, and velocity of air flow etc. They mainly influence the thermal efficiency of an evaporator, and therefore its thermal efficiency has direct relationship with the whole efficiency of the quick freeze plant. Evaporators with different structural types have different heat transfer efficiency, in order to obtain high efficiency structure of evaporator, 8 evaporator models with different fin shape, tube diameter and tube arrangement are analyzed and compared. The calculation results show that the integral waved fins, equilateral-triangle arranged small diameter tubes and varying fin-spacing has the highest heat transfer coefficient. The experimental result also shows that the evaporator with this type of structure has better thermal efficiency. The experimental result is in good agreement with the calculation result, it can instruct engineering design for usual designer. A real quick-freeze equipment is designed and put into production. The result shows that, compared with traditional domestic quick-freeze equipments, this equipment decreases by 40% in size and by 20% in energy consumption.展开更多
Funded by the National Natural Science Foundation of China,Chinese Ministry of Science and Technology,and Chinese Academy of Sciences,ajoint team of three laboratories from the Institute of Biophysics of Chinese Acade...Funded by the National Natural Science Foundation of China,Chinese Ministry of Science and Technology,and Chinese Academy of Sciences,ajoint team of three laboratories from the Institute of Biophysics of Chinese Academy of Sciences,namely Liu Zhenfeng’s(柳振峰),Zhang展开更多
Medicinal plants are popular and widely used as a major source of herbal drugs and pharmaceutical compounds. Ever-growing demands make medicinal plants faced to several problems including efficacy and safety to meet b...Medicinal plants are popular and widely used as a major source of herbal drugs and pharmaceutical compounds. Ever-growing demands make medicinal plants faced to several problems including efficacy and safety to meet business requirements, conservation, and artificially assisted breeding. As a powerful molecular tool, microsatellites offer the great potentials for various purposes in plants. This review provides a scenario of microsatellites in medicinal plants including development from genomic or expressed sequence tag libraries, cross-species transferability, genotyping, and potential applications. We emphasized on the authentication of medicinal plants by microsatellite markers.展开更多
基金This project is supported by National Key Technologies R&D Programme,China (No.2001BA501A22).
文摘The evaporator is the main part of a quick-freeze equipment. There are many factors influencing the heat transfer coefficient of an evaporator. The most important factors among them are the fin shape, tube diameter, distance of fin space, frost, and velocity of air flow etc. They mainly influence the thermal efficiency of an evaporator, and therefore its thermal efficiency has direct relationship with the whole efficiency of the quick freeze plant. Evaporators with different structural types have different heat transfer efficiency, in order to obtain high efficiency structure of evaporator, 8 evaporator models with different fin shape, tube diameter and tube arrangement are analyzed and compared. The calculation results show that the integral waved fins, equilateral-triangle arranged small diameter tubes and varying fin-spacing has the highest heat transfer coefficient. The experimental result also shows that the evaporator with this type of structure has better thermal efficiency. The experimental result is in good agreement with the calculation result, it can instruct engineering design for usual designer. A real quick-freeze equipment is designed and put into production. The result shows that, compared with traditional domestic quick-freeze equipments, this equipment decreases by 40% in size and by 20% in energy consumption.
文摘Funded by the National Natural Science Foundation of China,Chinese Ministry of Science and Technology,and Chinese Academy of Sciences,ajoint team of three laboratories from the Institute of Biophysics of Chinese Academy of Sciences,namely Liu Zhenfeng’s(柳振峰),Zhang
基金National Natural Science Foundation of China(31270340,31200225,30800624)Instrument Developing Project of the Chinese Academy of Sciences(YZ201227)+1 种基金the Key Research Program of the Chinese Academy of Sciences(Grant NO.KSZD-EW-Z-004)Grant from Zhongning County
文摘Medicinal plants are popular and widely used as a major source of herbal drugs and pharmaceutical compounds. Ever-growing demands make medicinal plants faced to several problems including efficacy and safety to meet business requirements, conservation, and artificially assisted breeding. As a powerful molecular tool, microsatellites offer the great potentials for various purposes in plants. This review provides a scenario of microsatellites in medicinal plants including development from genomic or expressed sequence tag libraries, cross-species transferability, genotyping, and potential applications. We emphasized on the authentication of medicinal plants by microsatellite markers.
