Effects of CFC substitutes
نویسندگان
چکیده
منابع مشابه
An Experimental Investigation of Ternary Refrigerant Blends Performance Proposed as Substitutes for CFC-12
In this paper, the performance of various concentrat~ons, of the proposed blends, as alternatives to CFC-12_, are evaluated under different operating conditions from thermal capacity, as well as coefficient of performance point of view. Other cycle characteristics, such as pressure ratio, system pressures, temperatures and compressor power are also discussed. This has been accomplished with the...
متن کاملUpdate on CFC Substitutes in the USA With Respect to Vapor Compression Technology
The refrigeration industry has been in a state of flux primarily because of the phase-out of ozone-depleting CFC refrigerants, and secondarily because of recent advances in compressor technology. This paper contains a review of current substitutes for CFCs and HCFCs which are under consideration by the compression refrigeration industry, an assessment of their characteristics related to choice ...
متن کاملThe effects of acute thrombocytopenia on megakaryocyte-CFC and granulocyte-macrophage-CFC in mice: studies of bone marrow and spleen.
The effects of acute thrombocytopenia, produced by platelet antiserum (PAS), on both megakaryocyte colony-forming cells (Meg-CFC) and granulocyte-macrophage colony-forming cells (GM-CFC) were studied. During the 1-hr to 14-day period following acute thrombocytopenia (platelet counts < 5% of normal), bone marrow and splenic cells of C57BL/6J mice were obtained and cultured for 7 days in 0.3% aga...
متن کاملDegradation rates of CFC-11, CFC-12 and CFC-113 in anoxic shallow aquifers of Araihazar, Bangladesh.
Chlorofluorocarbons CFC-11 (CCl(3)F), CFC-12 (CCl(2)F(2)), and CFC-113 (CCl(2)F-CClF(2)) are used in hydrology as transient tracers under the assumption of conservative behavior in the unsaturated and saturated soil zones. However, laboratory and field studies have shown that these compounds are not stable under anaerobic conditions. To determine the degradation rates of CFCs in a tropical envi...
متن کاملThe wall of the chick embryo aorta harbours M-CFC, G-CFC, GM-CFC and BFU-E.
In the 3- to 4-day avian embryo, after the first wave of haemopoiesis which derives in the yolk sac from haemopoietic stem cells formed in situ, haemopoietic cells emerge in an intraembryonic site, the wall of the aorta. In this paper, we demonstrate that this site harbours M-CFC, G-CFC, GM-CFC and late and early BFU-E. In serum-free medium, the growth of M-CFC and GM-CFC was strictly dependent...
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ژورنال
عنوان ژورنال: Nature
سال: 1990
ISSN: 0028-0836,1476-4687
DOI: 10.1038/344492b0