Results 101 to 110 of about 121,504 (326)

On the abundance of non-cometary HCN on Jupiter

open access: yes, 2010
Using one-dimensional thermochemical/photochemical kinetics and transport models, we examine the chemistry of nitrogen-bearing species in the Jovian troposphere in an attempt to explain the low observational upper limit for HCN.
Achterberg   +169 more
core   +1 more source

The relaxation of OH (v = 1) and OD (v = 1) by H2O and D2O at temperatures from 251 to 390 K [PDF]

open access: yes, 2006
We report rate coefficients for the relaxation of OH(v = 1) and OD(v = 1) by H2O and D2O as a function of temperature between 251 and 390 K. All four rate coefficients exhibit a negative dependence on temperature. In Arrhenius form, the rate coefficients
Marshall, P.   +4 more
core   +2 more sources

Photolysis of 3-hydroxyisoxazoles.

open access: yesAgricultural and Biological Chemistry, 1974
Photolysis of 3-hydroxy-5-phenylisoxazole in methanol with a low-pressure mercury lamp afforded 5-phenyl-4-oxazolin-2-one, together with small amounts of benzoic acid and benzoylacetamide. Similarly, 3-hydroxy-5-methylisoxazole in distilled water afforded 5-methyl-4-oxazolin-2-one as the major product.
Masayuki Nakagawa   +2 more
openaire   +2 more sources

Kinetics of the photolysis of benzenetricarbonylchromium(0) in chloroform [PDF]

open access: yes, 2000
In contrast to the photolysis of Cr(CO)3(C6H6) in nonhalogenated solvents, in which the products are CrL(CO)2(C6H6) in the presence of a donor L, or Cr(CO)6 and C6H6 if no donor is present, the photo-reaction in chloroform yields CrCl3.
Federici, Leslianna, Hoggard, Patrick E.
core   +1 more source

A Born-Oppenheimer photolysis model of N_2O fractionation [PDF]

open access: yes, 2003
The isotopically light N_2O produced by microbial activity is thought to be balanced by the return of heavy stratospheric nitrous oxide. The Yung and Miller [1997] method that first explained these trends yields photolytic fractionation factors ∼half ...
Blake, Geoffrey A.   +3 more
core  

Enhanced Resolution in EPR Spectroscopy Using para‐Hydrogen Matrices

open access: yesAngewandte Chemie International Edition, EarlyView.
We demonstrate the advantageous properties of solid para‐hydrogen (p‐H2) matrices for electron paramagnetic resonance (EPR) spectroscopy by investigating the 2,2,6,6‐tetramethylpiperidinyloxyl (TEMPO) radical and an in situ generated P‐centered mono‐radical.
Adrián Portela‐González   +2 more
wiley   +1 more source

UV Laser-Induced Photodecomposition of Matrix-Isolated Salicylhydroxamic Acid: Identification of New Isocyanate Complexes

open access: yesMolecules
Photochemical reactions of salicylhydroxamic acid were induced using tunable UV laser radiation followed by FTIR spectroscopy. Four pairs of co-products were experimentally found to appear in the photolysis: C6H4(OH)NCO⋯H2O (1), C6H4(OH)C(O)N⋯H2O (2 ...
Magdalena Sałdyka, Zofia Mielke
doaj   +1 more source

Diphenylcarbene Protected by Four ortho-Iodine Groups: An Unusually Persistent Triplet Carbene

open access: yesMolecules, 2016
Diphenyldiazomethane with four iodine groups at the ortho positions and two tert-butyl groups at the para positions, i.e., bis(4-tert-butyl-2,6-diiodophenyl)diazomethane (1a-N2), was synthesized as a sterically hindered triplet carbene precursor ...
Katsuyuki Hirai   +3 more
doaj   +1 more source

Deciphering the photolysis products and biological concerns of triclosan under UVC and UVA

open access: gold, 2023
Liping Li   +9 more
openalex   +1 more source

Strong 13C depletion induced by solar UV photolysis of CO2 and its implication for early Mars [PDF]

open access: gold, 2023
Matthew S. Johnson   +6 more
openalex   +1 more source

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