111 research outputs found

    Exposure of bakery and pastry apprentices to airborne flour dust using PM2.5 and PM10 personal samplers

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    <p>Abstract</p> <p>Background</p> <p>This study describes exposure levels of bakery and pastry apprentices to flour dust, a known risk factor of occupational asthma.</p> <p>Methods</p> <p>Questionnaires on work activity were completed by 286 students. Among them, 34 performed a series of two personal exposure measurements using a PM<sub>2.5 </sub>and PM<sub>10 </sub>personal sampler during a complete work shift, one during a cold ("winter") period, and the other during a hot ("summer") period.</p> <p>Results</p> <p>Bakery apprentices experience greater average PM<sub>2.5 </sub>and PM<sub>10 </sub>exposures than pastry apprentices (p < 0.006). Exposure values for both particulate fractions are greater in winter (average PM<sub>10 </sub>values among bakers = 1.10 mg.m<sup>-3 </sup>[standard deviation: 0.83]) than in summer (0.63 mg.m<sup>-3 </sup>[0.36]). While complying with current European occupational limit values, these exposures exceed the ACGIH recommendations set to prevent sensitization to flour dust (0.5 mg.m<sup>-3</sup>). Over half the facilities had no ventilation system.</p> <p>Conclusion</p> <p>Young bakery apprentices incur substantial exposure to known airways allergens, a situation that might elicit early induction of airways inflammation.</p

    Adresse de la société des amis de la Constitution à Rouen, lors de la séance du 18 juillet 1791

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    Le Couteulx de Canteleu Jean Barthélemy, Boissy d'Anglas François Antoine de. Adresse de la société des amis de la Constitution à Rouen, lors de la séance du 18 juillet 1791. In: Archives Parlementaires de 1787 à 1860 - Première série (1787-1799) Tome XXVIII - Du 6 juillet au 28 juillet 1791. Paris : Librairie Administrative P. Dupont, 1887. p. 396

    Nomination de six commissaires pour se rendre promptement aux Tuileries, lors de la séance du 25 juin 1791

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    Le Couteulx de Canteleu Jean Barthélemy, Beauharnais Alexandre François, vicomte de. Nomination de six commissaires pour se rendre promptement aux Tuileries, lors de la séance du 25 juin 1791. In: Archives Parlementaires de 1787 à 1860 - Première série (1787-1799) Tome XXVII - Du 6 juin au 5 juillet 1791. Paris : Librairie Administrative P. Dupont, 1887. p. 527

    Modelling the Venusian airglow

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    Modelling of the Venusian ionosphere fluorescence is required, to analyse data being collected by the SPICAV instrument onboard Venus Express.Aims. We present the modelling of the production of excited states of O, CO and N2, which enables the computation of nightglow emissions. In the dayside, we compute several emissions, taking advantage of the small influence of resonant scattering for forbidden transitions.We compute photoionisation and photodissociation mechanisms, and the photoelectron production. We compute electron impact excitation and ionisation, through a multi-stream stationary kinetic transport code. Finally, we compute the ion recombination using a stationary chemical model.We predict altitude density profiles for O(1S) and O(1D) states, and emissions corresponding to their different transitions. They are found to agree with observations. In the nightside, we discuss the different O(1S) excitation mechanisms as a source of green line emission. We calculate production intensities of the O(3S) and O(5S) states. For CO, we compute the Cameron bands and the Fourth Positive bands emissions. For N2, we compute the LBH, first and Second Positive bands. All values are compared successfully to experiments when data are available.For the first time, a comprehensive model is proposed to compute dayglow and nightglow emissions of the Venusian upper atmosphere. It relies on previous works with noticeable improvements, both on the transport side and on the chemical side. In the near future, a radiative-transfer model will be used to compute optically-thick lines in the dayglow, and a fluid model will be added to compute ion densities

    Discussion sur la nécessité ou non d'adopter rapidement le décret sur le libellés des assignats, lors de la séance du 30 avril 1790

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    Goupilleau de Fontenay Jean-François, Laborde de Méréville François Louis Joseph de, Le Couteulx de Canteleu Jean Barthélemy. Discussion sur la nécessité ou non d'adopter rapidement le décret sur le libellés des assignats, lors de la séance du 30 avril 1790. In: Archives Parlementaires de 1787 à 1860 - Première série (1787-1799) Tome XV - Du 21 avril au 30 mai 1790. Paris : Librairie Administrative P. Dupont, 1883. p. 341

    Nomination de six commissaires pour se rendre promptement aux Tuileries, lors de la séance du 25 juin 1791

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    Le Couteulx de Canteleu Jean Barthélemy, Beauharnais Alexandre François, vicomte de. Nomination de six commissaires pour se rendre promptement aux Tuileries, lors de la séance du 25 juin 1791. In: Archives Parlementaires de 1787 à 1860 - Première série (1787-1799) Tome XXVII - Du 6 juin au 5 juillet 1791. Paris : Librairie Administrative P. Dupont, 1887. p. 527
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