Results 191 to 200 of about 12,721 (243)
Inhibition of histone lysine demethylase restores learning and memory in aged mice
Bhatt S +12 more
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Cardiofaciocutaneous (CFC) syndrome
Australasian Journal of Dermatology, 1999An 11‐year‐old boy affected by mental retardation and seizures demonstrates congenital heart defect, many dysmorphic features and dry skin. His hair is sparse over the vertex with alopecia of the eyebrows and eyelashes. There are horny small papules evident in those areas. The diagnosis of cardiofaciocutaneous syndrome has been made.
Schepis C., Greco D., Romano C.
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Measurements of CFCs in Antarctica
Environmental Monitoring and Assessment, 1994The problem of chlorofluorocarbons (CFCs) analysis in the open atmosphere was suddenly brought to the attention of the scientific community soon after the research by Molina e Rowland [1,2] showed that these very stable compounds could be one of the major causes of stratospheric ozone depletion.
F. Bruner +2 more
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The CFC-Ozone Issue: Progress on the Development of Alternatives to CFCs
Science, 1990Chlorofluorocarbons (CFCs) are now believed to be major contributors to the seasonal ozone depletion over the Antarctic continent. However, because they are so important to many aspects of modern society, it would be irresponsible to immediately cease their production. The identification of suitable substitutes is difficult when issues such as toxicity,
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Different pharmacokinetics of dichlorofluoromethane (CFC 21) and chlorodifluoromethane (CFC 22)
Archives of Toxicology, 1986Inhalation pharmacokinetics of dichlorofluoromethane (CFC 21) and chlorodifluoromethane (CFC 22) were studied in male Wistar rats by use of a closed inhalation chamber system. CFC 21 was readily eliminated via metabolism. However, CFC 22 underwent no detectable metabolism; pretreatment of the rats with DDT or phenobarbital did not stimulate metabolic ...
H, Peter +3 more
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The wall of the chick embryo aorta harbours M-CFC, G-CFC, GM-CFC and BFU-E
Development, 1988Abstract 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.
F, Cormier, F, Dieterlen-Lièvre
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Degradation rates of CFC-11, CFC-12 and CFC-113 in anoxic shallow aquifers of Araihazar, Bangladesh
Journal of Contaminant Hydrology, 2008Chlorofluorocarbons 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.
A, Horneman +9 more
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The Chemical Educator, 2005
On the occasion of the 75th anniversary of the introduction of dichlorofluoromethane, the first of the CFCs to be used commercially as a refrigerant, this article reviews its discovery by Thomas Midgley, Jr. (1889–1944) and later developments necessitated by the deleterious effect of “Freons” on the ozone layer.
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On the occasion of the 75th anniversary of the introduction of dichlorofluoromethane, the first of the CFCs to be used commercially as a refrigerant, this article reviews its discovery by Thomas Midgley, Jr. (1889–1944) and later developments necessitated by the deleterious effect of “Freons” on the ozone layer.
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On the multiplicativity of CFC-spaces
Mathematical Notes, 2013We assume that all spaces are Hausdorff. By a mapping we mean a continuous surjective mapping. Recall that a space \(X\) is \(H\)-closed if it is closed in every space it is embedded in. A mapping \(f:X\rightarrow Y\) is said to be a \(C_{\tau}\)-mapping if the complete preimage of every point is a compact subset and whose cardinality is less than ...
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