63 research outputs found
Alpha-pinene oxidation by OH: simulations of laboratory experiments
International audienceThis paper presents a state-of-the-art gas-phase mechanism for the degradation of ?-pinene by OH and its validation by box model simulations of laboratory measurements. It is based on the near-explicit mechanisms for the oxidation of ?-pinene and pinonaldehyde by OH proposed by Peeters and co-workers. The extensive set of ?-pinene photooxidation experiments performed in presence as well as in absence of NO by Nozière et al. (1999a) is used to test the mechanism. The comparison of the calculated vs measured concentrations as a function of time shows that the levels of OH, NO, NO2 and light are well reproduced in the model. Noting the large scatter in the experimental results as well as the difficulty to retrieve true product yields from concentrations data, a methodology is proposed for comparing the model and the data. The model succeeds in reproducing the average apparent yields of pinonaldehyde, acetone, total nitrates and total PANs in the experiments performed in presence of NO. In absence of NO, pinonaldehyde is fairly well reproduced, but acetone is largely underestimated. The dependence of the product yields on the concentration of NO and ?-pinene is investigated, with a special attention on the influence of the multiple competitions of reactions affecting the peroxy radicals in the mechanism. We show that the main oxidation channels differ largely according to photochemical conditions. E.g. the pinonaldehyde yield is estimated to be about 10% in the remote atmosphere and up to 60% in very polluted areas. We stress the need for additional theoretical/laboratory work to unravel the chemistry of the primary products as well as the ozonolysis and nitrate-initiated oxidation of ?-pinene
Induction of anaesthesia with ketamine during an acute crisis of hereditary coproporphyria
Comparative safety of serotonin (5-HT3) receptor antagonists in patients undergoing surgery: a systematic review and network meta-analysis
Saturation Vapor Pressures and Transition Enthalpies of Low-Volatility Organic Molecules of Atmospheric Relevance: From Dicarboxylic Acids to Complex Mixtures
L'asthme de l'enfant et les problèmes d'anesthésie qu'il pose
info:eu-repo/semantics/nonPublishe
Rectal benzodiazepines for premedication in children. Review and personal experience
SCOPUS: re.jinfo:eu-repo/semantics/publishe
Failure of metronidazole to alter a vecuronium neuromuscular blockade in humans
SCOPUS: ar.jinfo:eu-repo/semantics/publishe
Modeling the oxidation of alpha-pinene and the related aerosol formation in laboratory and atmospheric conditions
Doctorat en Sciencesinfo:eu-repo/semantics/nonPublishe
An episode of hypotension associated with tachycardia during anesthesia which resisted vasoconstrictor treatment. Case report
SCOPUS: ar.jinfo:eu-repo/semantics/publishe
E-liquides : fumer "bio", c'est meilleur pour la santé ?
Fumer “bio” avec une cigarette électronique, est-ce meilleur pour la santé ? Les fabricants d’ e-liquides qui développent des produits “bio” semblent en tout cas convaincus.
interview sur le site web de rtbf: https://www.rtbf.be/info/societe/onpdp/detail_e-liquides-fumer-bio-c-est…</p
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