The Radiation-Induced Chain Reaction between Nitrous Oxide and Hydrogen in Aqueous Solutions1

1964 ◽  
Vol 68 (6) ◽  
pp. 1429-1432 ◽  
Author(s):  
C. H. Cheek ◽  
J. W. Swinnerton
Keyword(s):  
Nitrous Oxide ◽  
Chain Reaction ◽  
Radiation Induced

scholarly journals Radiolysis of methylcyclohexane. IV. Effects of carbon tetrachloride and nitrous oxide in the vapor phase

1967 ◽  
Vol 45 (14) ◽  
pp. 1661-1668 ◽  
Author(s):  
W. J. Holtslander ◽  
G. R. Freeman
Keyword(s):  
Nitrous Oxide ◽  
Carbon Tetrachloride ◽  
Vapor Phase ◽  
Electron Affinity ◽  
Exothermic Reaction ◽  
Product Formation ◽  
Chain Termination ◽  
Chain Reaction ◽  
Positive Ions ◽  
Radiation Induced

There is a radiation-induced chain reaction in methylcyclohexane (MCH) – CCl4 mixtures in the vapor phase at 110° and 380 Torr. The chain-propagation products are chloroform and methylcyclohexylchloride (Gmax ≈ 40) and the chain-termination products are mainly methylcyclohexene (MC), bimethylcyclohexyl (C14), and hexachloroethane, depending on the composition of the mixture. At CCl4 concentrations < 1 mole%, HCl is formed mainly by reaction of Cl− with positive ions, e.g. Cl− + C7H14+ → HCl + C7H13. The value of the ratio G(MC)/G(C14) is 8 ± 1 in pure MCH and in the mixtures up to 44 mole% CCl4.There is a radiation-induced chain reaction in MCH–N2O mixtures in the vapor phase. At 110° and 380 Torr, G(N2) = 22, G(MC) = 16, and G(C14) = 1.6, independent of N2O concentration between 2 and 10 mole%. The G-values are independent of MCH pressure between 50 and 520 Torr. Product formation is inhibited by the addition of SF6 or DI. The half-life of the ion N2O− with respect to decomposition to N2 + O− is 10−4–10−3 s under these conditions. It is suggested that the mechanism contains the reactions [Formula: see text] [Formula: see text]Reaction [24] is slightly exothermic. Reaction [25] is exothermic if the electron affinity of N2O is greater than that of C7H13.

Kinetics of Silicon Oxide Thin Film Deposition From Silane and Disilane with Nitrous Oxide.

1987 ◽  
Vol 105 ◽  
Author(s):  
Jonathan D. Chapple-Sokol ◽  
Carmen J. Giunta ◽  
Roy G. Gordon
Keyword(s):  
Nitrous Oxide ◽  
Silicon Dioxide ◽  
Silicon Oxide ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Oxide Thin Film ◽  
Mechanistic Study ◽  
Chain Reaction ◽  
Kinetics Of ◽  
Homogeneous Decomposition

AbstractA mechanistic study of the deposition of silicon oxide films (SiOx, 0 < x ≤2) from silanes with nitrous oxide was performed. The depositions of non-stoichiometric films from silane and stoichiometric silicon dioxide from disilane were dominated by SiH2 generation from the decomposition of the silicon-containing reactant. The depositions of stoichiometric films from silane were found to follow chain reaction kinetics initiated by the homogeneous decomposition of N2O.

The use of deficiencies to determine essential gene content in the let-56–unc-22 region of Caenorhabditis elegans

Genome ◽  
1993 ◽  
Vol 36 (6) ◽  
pp. 1148-1156 ◽  
Author(s):  
Jacquie E. Schein ◽  
Marco A. Marra ◽  
Guy M. Benian ◽  
Chris Fields ◽  
David L. Baillie
Keyword(s):  
Polymerase Chain Reaction ◽  
Caenorhabditis Elegans ◽  
Genomic Sequence ◽  
Essential Gene ◽  
Chain Reaction ◽  
Radiation Induced ◽  
Practical Tool ◽  
Polymerase Chain ◽  
Selection Of

We have investigated the possibility of using the polymerase chain reaction to detect deletions of coding elements in the unc-22–let-56 interval on chromosome IV in the nematode Caenorhabditis elegans. Our analysis of approximately 13 kb of genomic sequence immediately to the left of the unc-22 gene resulted in the identification of four possible genes. Partial cDNAs have been identified for three of them. To determine whether any of these coding elements are essential for development, we required a method for the induction and selection of mutations in these elements. Our approach was to identify a set of formaldehyde and gamma radiation induced unc-22 mutations that mapped to the unc-22–let-56 region, and then employ polymerase chain reaction methodology to identify deficiencies that affected one or more of the four identified coding elements. Two small deficiencies were identified in this manner. Characterization of these deficiencies shows that there are no coding elements between unc-22 and let-56 (the nearest mutationally identified gene to the left of unc-22), which are required in development under laboratory conditions. We conclude that the polymerase chain reaction is a practical tool for the detection of deletions of coding elements identified in this region, and that characterization of such deficiencies provides a method for assessing whether or not these elements are required for development.Key words: Caenorhabditis elegans, deficiencies, coding elements, unc-22.

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