In 1980-1983 small-scale tests were conducted and background information was obtalned to determine the feasibility of developing a quarantine treatment with methyl bromide (MB) for the codling moth (Cydia pomonella La) infesting in-shall walnuts. Some of the studies conducted at this time included basic dose mortality responses of diapausing and nondiapausing larvae, residue determinations and ...

Ab initio calculations at the G2 level were used in a theoretical description of the kinetics and mechanism of the hydrogen abstraction reactions from fluoro-, chloro- and bromomethane by chlorine atoms. The profiles of the potential energy surfaces show that mechanism of the reactions under investigation is complex and consists of two - in the case of CH3F+Cl - and of three elementary steps fo...

We demonstrate here an alternative scheme for C(1) coupling by way of methane bromination, followed by concurrent bromomethane condensation and quantitative HBr neutralization; regeneration of the metal oxide with O(2) with recovery of Br(2) completes the cycle.

The vacuum ultraviolet laser-excited photoion-pair formation spectrum of CH 3Br has been measured under high resolution in the threshold region. The (2 + 1) and (3 + 1) resonance-enhanced multiphoton ionization spectra in the same energy region are also reported. By comparison of the spectra in this and a more extended region, resonances in the photoion-pair formation spectrum are assigned to p...

Electron transfer collisions between beams of neutral K atoms and neutral alkyl bromide ~R–Br! molecules (R5CH3 ,t-C4H9) are observed by detecting positive and negative ions in coincidence for energies *4 eV, the minimum energy for overcoming the Coulomb attraction between ions. The molecules are state selected by a hexapole electric field and oriented prior to the electron transfer. The steric...

The isotopic composition of methyl bromide (CH3Br) has been suggested to be a potentially useful tracer for constraining the global CH3Br budget. In order to determine the carbon isotopic composition of CH3Br emitted from the most significant anthropogenic application (pre-plant fumigation) we directly measured the δ13C of CH3Br released during commercial fumigation. We also measured the isotop...

The atmospheric budget of methyl bromide (CH(3)Br), an ozone-depleting gas, is highly uncertain, because it has complex sources and sinks. Although oceans, biomass burning, and industrial production are identified as the major sources, the fraction of CH(3)Br that is contributed by each source is not well known. A mass-balance approach that exploits differences in the carbon isotopic signature ...

We herein aimed to evaluate the neuroprotective effects of resveratrol on a mouse model Parkinson’s disease and explore whether Wnt/beta-catenin signaling pathway was involved. Thirty male C57 black 6 mice were randomly divided into control group, group (1-methyl-4-phenyl-1,2,3,6- tetrahydropyridine) treatment (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine resveratrol) (n=10). The groups intrape...

Introduction Since the seventies, many horticultural crops heavily relied on methyl bromide (MB) to control soilborne pests, diseases and weeds in Italy. As one of the major consumer of MB, after its inclusion among substances that deplete the ozone layer, Italy was forced to invest many resources in the development and implementation of alternative strategies for soil disinfestation. Such acti...

a Université Pierre et Marie Curie-Paris 6; CNRS; Laboratoire de Physique Moléculaire pour l’Atmosphère et l’Astrophysique (LPMAA), UMR 7092, Case courrier 76, 4, place Jussieu, 75252 Paris Cedex 05, France b Université Pierre et Marie Curie-Paris 6; CNRS; Laboratoire de Dynamique, Interactions et Réactivité (LADIR), UMR 7075, Case courrier 49, Bât F 74, 4, place Jussieu, 75252 Paris Cedex 05, ...