Use of the ground in the edge of the National Park of Brasília : a multitemporal analysis

The National Park of Brasilia is a unit of conservation of integral protection in urban area pressured by the strong urban swell of the brazilian federal capital. Its edge suffered throughout the years a disordered occupation, provoked for the irregular land divisions of public and private lands, invasions and construction of highways. The analysis space-time of this phenomenon can be made through the geoprocessing with the use of images of satellite of different times, classified in groups of uses, relating the society-space process of origin politics, agrarian, environment and patrimonial to the transformation phenomenon space-time of ecosystem Savanna materialize. A time that one of the purposes of an unit of conservation is to keep the biodiversity of ecosystem local, this pressure in its edge provokes the isolation of the fauna and the flora, compromising the genetic transit and the survival of some species

Limonene photocatalytic oxidation at ppb levels: characterization of gas phase, and adsorbed phase intermediates

International audienc

Method development and validation for the determination of sulfites and sulfates on the surface of mineral atmospheric samples using reverse-phase liquid chromatography

International audienc

Limonene photocatalytic oxidation at ppb levels: characterization of gas phase, and adsorbed phase intermediates

International audienc

Monitoring Mold growth and VOC Emissions from Wood Wool Insulations under Unfavorable Hygrothermal Conditions

Mold growth on indoor surfaces can lead to severe human health effects. The presence of bio-based surfaces under high humidity conditions is expected to favor its development. This study used a custom-built wall at a 1:1 scale mimicking the building structure of real walls of a French public building containing wood wool as a bio-sourced insulation material. The wall was placed at ambient temperature and relative humidity of 70±5% in order not only to characterize mold development, but also Volatile Organic Compounds (VOCs) emissions. Moreover, a 60 x 60 cm piece of the wood wool was inoculated with about 700 CFU/cm2 of the fungus Aspergillus niger to evaluate the proliferation of micro-organisms under these conditions and eventually the emission of microbial Volatile Organic Compounds (mVOCs). The surface emission rates (ER) of Total Volatile Organic Compounds (TVOCs) and mVOCs were thus measured from the inoculated and non-inoculated surfaces. No mold development was observed by the naked eye on the inoculated or on the non-inoculated surface of the wood wool after one month and this was confirmed by counting the CFU number. Only four mVOCs were detected from both surfaces with a low ER of less than 1 μg m-2 h-1. The ER of TVOCs was 90.3 μg m-2 h-1 from the non-inoculated surface and 71.2 μg m-2 h-1 from the inoculated surface. The obtained results show that the selected hygrothermal conditions are not sufficient for mold development on wood wool and that the detection of mVOCs is not a reliable indicator for microbial growth.publishedVersio

Heterogeneous interaction of isopropanol with Gobi mineral dusts under simulated atmospheric conditions

International audienc

Heterogeneous interaction of isopropanol with Gobi mineral dusts under simulated atmospheric conditions

International audienc

Heterogeneous interaction of isopropanol with mineral dust surfaces under simulated atmospheric conditions

International audienc

Heterogeneous interaction of volatile organic compounds with natural mineral dust surfaces under simulated atmospheric conditions

International audienc

Heterogeneous interaction of isopropanol with mineral dust surfaces under simulated atmospheric conditions

International audienc