Contributors and CFC
نویسندگان
چکیده
منابع مشابه
Degradation 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...
متن کاملAtmospheric histories and emissions of chlorofluorocarbons CFC-13 (CClF3), 6CFC-114 (C2Cl2F4), and CFC-115 (C2ClF5)
Based on observations of the chlorofluorocarbons CFC-13 (chlorotrifluoromethane), 6CFC-114 (combined measurement of both isomers of dichlorotetrafluoroethane), and CFC-115 (chloropentafluoroethane) in atmospheric and firn samples, we reconstruct records of their tropospheric histories spanning nearly 8 decades. These compounds were measured in polar firn air samples, in ambient air archived in ...
متن کاملStratospheric Loss and Atmospheric Lifetimes of CFC-11 and CFC-12 Derived From Satellite Observations
The lifetimes of CFC-11 and CFC-12 have been evaluated using global observations of their stratospheric distributions from satellite-based instruments over the time period from 1992 to 2010. The chlorofluorocarbon (CFC) datasets are from the Cryogen Limb Array Etalon Spectrometer (CLAES), the Cryogenic Infrared Spectrometers and Telescopes for the Atmosphere (CRISTA-1 and CRISTA2), the Michelso...
متن کاملValidation of Mipas-envisat Ch4, N2o, Cfc-11 and Cfc-12 by Airborne in Situ Observations
Airborne in situ measurements of the trace gases CH4, N2O, CFC-11 and CFC-12 with the High Altitude Gas AnalyzeR (HAGAR) on board the M55 Geophysica aircraft and the balloon-borne cryosampler BONBON of the University of Frankfurt are compared to vertical profiles from MIPAS-ENVISAT. We validate ESA level-2 standard products (v. 4.61) and non-operational trace gas profiles of CH4, N2O, CFC-11 an...
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ژورنال
عنوان ژورنال: Early Modern Culture Online
سال: 2015
ISSN: 1892-0888
DOI: 10.15845/emco.v6i1.1272