The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
N. Fukuta - One of the best experts on this subject based on the ideXlab platform.
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Evaporation Decay Organic Nucleus of ice Particle
The Journal of Weather Modification, 2012Co-Authors: H. R. Vasquez, N. FukutaAbstract:Evaporation rates have been determined for two Organic ice nucleus particles: 1,5-Dihydroxynaphthalene and metaldehyde aerosols, produced by powder vaporization-condensation method and by vapor activation method, respectively. The aerosols are injected into a large smoke chamber inside a walkin environmental room and allowed to evaporate under dry conditions at different temperatures. The Decay rates of aerosols are determined in a mixing chamber at -15 C with intermittent sampling at predetermined time intervals. The aerosol concentration losses are compared with cumulative size distributions, and assuming that the Decay proceeds from smaller sizes, lifetimes of particles for different temperatures are determined as a function of minimum size. Metaldehyde particles less than 0.6 um in diameter de- cay within 20 minutes at temperature as cold as -20 C, and 1,5-dihydroxynaphthalene particles within several hours, if particle diameters are smaller than 0.2 um at the same temperature. These data are expected to provide the basis for estimating, as well as minimizing, the extent of possible downwind and environmental contamination through use of these Organic ice nucleants.
Jinsik Sohn - One of the best experts on this subject based on the ideXlab platform.
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Modeling of Chlorine Disinfectant Decay in Seawater
Journal of Korean Society of Water and Wastewater, 2016Co-Authors: Jihee Han, Jinsik SohnAbstract:Disinfectant/oxidation process is a crucial process in water treatment for supplying safe drinking water. Chlorination is still widely used for water treatment area due to its effectiveness on microbial inactivation and economic feasibility. Recently, disinfection concern in marine environment is increasing, for example, movement of hazardous marine organism due to ballast water, marine environmental degradation due to power plant cooling water discharge, and increase of the amount of disinfectant in the offshore plant. It is needed to conduct the assessment of disinfectant behavior and the development of disinfectant prediction model in seawater. The appropriate prediction model for disinfectant behavior is not yet provided. The objective of the study is to develop chlorine Decay model in seawater. Various model types were applied to develop the seawater chlorine Decay model, such as first order Decay model, EPA model, and two-phase model. The model simulation indicated that chlorine Decay in seawater is influenced by both Organic and inOrganic matter in seawater. While inOrganic matter has a negative correlation with the chlorine Decay, Organic matter has a positive correlation with the chlorine Decay.
H. R. Vasquez - One of the best experts on this subject based on the ideXlab platform.
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Evaporation Decay Organic Nucleus of ice Particle
The Journal of Weather Modification, 2012Co-Authors: H. R. Vasquez, N. FukutaAbstract:Evaporation rates have been determined for two Organic ice nucleus particles: 1,5-Dihydroxynaphthalene and metaldehyde aerosols, produced by powder vaporization-condensation method and by vapor activation method, respectively. The aerosols are injected into a large smoke chamber inside a walkin environmental room and allowed to evaporate under dry conditions at different temperatures. The Decay rates of aerosols are determined in a mixing chamber at -15 C with intermittent sampling at predetermined time intervals. The aerosol concentration losses are compared with cumulative size distributions, and assuming that the Decay proceeds from smaller sizes, lifetimes of particles for different temperatures are determined as a function of minimum size. Metaldehyde particles less than 0.6 um in diameter de- cay within 20 minutes at temperature as cold as -20 C, and 1,5-dihydroxynaphthalene particles within several hours, if particle diameters are smaller than 0.2 um at the same temperature. These data are expected to provide the basis for estimating, as well as minimizing, the extent of possible downwind and environmental contamination through use of these Organic ice nucleants.
Jihee Han - One of the best experts on this subject based on the ideXlab platform.
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Modeling of Chlorine Disinfectant Decay in Seawater
Journal of Korean Society of Water and Wastewater, 2016Co-Authors: Jihee Han, Jinsik SohnAbstract:Disinfectant/oxidation process is a crucial process in water treatment for supplying safe drinking water. Chlorination is still widely used for water treatment area due to its effectiveness on microbial inactivation and economic feasibility. Recently, disinfection concern in marine environment is increasing, for example, movement of hazardous marine organism due to ballast water, marine environmental degradation due to power plant cooling water discharge, and increase of the amount of disinfectant in the offshore plant. It is needed to conduct the assessment of disinfectant behavior and the development of disinfectant prediction model in seawater. The appropriate prediction model for disinfectant behavior is not yet provided. The objective of the study is to develop chlorine Decay model in seawater. Various model types were applied to develop the seawater chlorine Decay model, such as first order Decay model, EPA model, and two-phase model. The model simulation indicated that chlorine Decay in seawater is influenced by both Organic and inOrganic matter in seawater. While inOrganic matter has a negative correlation with the chlorine Decay, Organic matter has a positive correlation with the chlorine Decay.
F. Warlop - One of the best experts on this subject based on the ideXlab platform.
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INTERET DE LA THERMOTHERAPIE POUR LUTTER CONTRE LES MALADIES DE CONSERVATION DES FRUITS A NOYAU EN POST RECOLTE
2003Co-Authors: F. WarlopAbstract:Post-harvest Decay are responsible of many damages in Organic and non Organic farming. Protection techniques in orchards under Organic farming standards are not sufficient yet. Fruit dipping in hot water (50°C) for 1 to 3 minutes give nevertheless very promising results, with a very high efficacy level, and a perspective of low pesticide residue level. Several years of trials, with many varieties and treatment conditions showed regular efficacy, and very few burst cases. Still, treatment effect on fruit quality (firmness, sugar rate...) has to be better assessed. Also, the dipping machine has to be engineered and experimented according to growers expectations. Key words : stone fruits, post harvest Decay, Organic farming, hot water treatment, conservation
