The Experts below are selected from a list of 13929 Experts worldwide ranked by ideXlab platform
Javier M Montserrat - One of the best experts on this subject based on the ideXlab platform.
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pesticide potential Dermal Exposure during the manipulation of concentrated mixtures at small horticultural and floricultural production units in argentina the formulation effect
Science of The Total Environment, 2014Co-Authors: Giselle Anahi Berenstein, Enrique A Hughes, Anita Zalts, Javier M Montserrat, Hugo March, Guillermo RojicAbstract:Abstract Potential Dermal Exposure measurements of horticultural and floricultural field operators that handled concentrated pesticides showed a correlation with the types of formulations used (liquid or solid) during the mix and load stage. For liquid formulations, hand Exposure was 22–62 times greater than that for solid ones. The Dermal Exposure mechanism was studied for this formulation under laboratory conditions, finding that the rupture of the aluminum seal of the pesticide container and the color of the liquid formulation are important factors. Additionally, significant external surface contamination of pesticide containers collected at horticultural farms was found. This could partially account for the differences between the Exposure levels of field and laboratory experiments for liquid formulations.
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potential Dermal Exposure in greenhouses for manual sprayers analysis of the mix load application and re entry stages
Science of The Total Environment, 2010Co-Authors: Laura M Ramos, Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier M Montserrat, Giselle A QuerejetaAbstract:Abstract An evaluation of the Potential Dermal Exposure for the mix/load, application and re-entry stages, associated with procymidone and deltamethrin usage, was carried out for tomatoes grown in greenhouses of small production units in Argentina. Eight experiments were done with four different operators, under typical field conditions with a lever operated backpack sprayer. The methodology applied was based on the Whole Body Dosimetry technique, evaluating a set of different data for the mix and load, application and re-entry operations. These results indicated that the Potential Dermal Exposure of the application step was (38 ± 17) mL h − 1 with the highest proportion on torso, head and arms. When the three stages were compared, re-entry was found to contribute least towards the total Potential Dermal Exposure; meanwhile in all cases, except one, the mix/load operation was the stage with highest Exposure. The Margin of Safety for each different operation was also calculated and the proportion of pesticide drift from the greenhouse to the environment is presented. These results emphasize the importance of improving the personal protection measures in the mix and load stage, an operation that is not usually associated with high-risk in small production units.
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potential Dermal Exposure to deltamethrin and risk assessment for manual sprayers influence of crop type
Science of The Total Environment, 2008Co-Authors: Enrique A Hughes, Andrea P Flores, Laura Ramos, Anita Zalts, Richard C Glass, Javier M MontserratAbstract:Abstract A comparison of the Potential Dermal Exposure (PDE) of workers to the insecticide deltamethrin was made as a function of crop type, in small agricultural production units in Argentina. Seven experiments were done with two different crops (maize and broccoli, treated area between 600 and 1000 m 2 ) with three different operators under typical field conditions using a lever operated knapsack. The methodology is based on the whole body dosimetry technique, presenting separately the data for mixing/loading and application activities. These results indicate a higher concentration of pesticide in lower body sections for broccoli and a wider distribution for maize. The risk inherent in these agricultural procedures is estimated through Margin of Safety (MOS) values and was found to be generally safe. Preliminary results of a mass balance distribution of the pesticide between crop, soil and operator are also presented.
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analytical method for assessing potential Dermal Exposure to captan using whole body dosimetry in small vegetable production units in argentina
Pest Management Science, 2006Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M MontserratAbstract:An analytical method has been developed that can be used to determine the potential Dermal Exposure (PDE) of workers to the pesticide captan in small-scale horticultural production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential Dermal Exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry
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analytical method for assessing potential Dermal Exposure to captan using whole body dosimetry in small vegetable production units in argentina
Pest Management Science, 2006Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M MontserratAbstract:An analytical method has been developed that can be used to determine the potential Dermal Exposure (PDE) of workers to the pesticide captan in small-scale horticultural production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential Dermal Exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.
Mujtaba Baqar - One of the best experts on this subject based on the ideXlab platform.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n=54) and surface sediment (n=54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑OCPs concentrations ranged from 13.61 to 1992.18ng/g dry weight and 12.89 to 128.16ng/L with predominance of β-endosulfan and p,p'-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p'-DDT/p,p'-DDT, (DDE+DDD)/∑DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be >1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E-05 to 2.48E-02 (acceptable limit; <1). However, the calculated carcinogenic risk possessed by OCPs through Dermal Exposure ranged from 1.39E-10 to 1.98E-05 that highlighted the considerable carcinogenic risk associated to aldrin, dieldrin, p,p'-DDT and β-endosulfan at certain studied sites. Therefore, the high levels of ecological risk and carcinogenic human health risk had emphasized an immediate elimination of ongoing OCPs addition in the studied area.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:Abstract This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n = 54) and surface sediment (n = 54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑ OCPs concentrations ranged from 13.61 to 1992.18 ng/g dry weight and 12.89 to 128.16 ng/L with predominance of β-endosulfan and p,p′-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p′-DDT/p,p′-DDT, (DDE + DDD) / ∑ DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be > 1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E − 05 to 2.48E − 02 (acceptable limit;
Enrique A Hughes - One of the best experts on this subject based on the ideXlab platform.
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pesticide potential Dermal Exposure during the manipulation of concentrated mixtures at small horticultural and floricultural production units in argentina the formulation effect
Science of The Total Environment, 2014Co-Authors: Giselle Anahi Berenstein, Enrique A Hughes, Anita Zalts, Javier M Montserrat, Hugo March, Guillermo RojicAbstract:Abstract Potential Dermal Exposure measurements of horticultural and floricultural field operators that handled concentrated pesticides showed a correlation with the types of formulations used (liquid or solid) during the mix and load stage. For liquid formulations, hand Exposure was 22–62 times greater than that for solid ones. The Dermal Exposure mechanism was studied for this formulation under laboratory conditions, finding that the rupture of the aluminum seal of the pesticide container and the color of the liquid formulation are important factors. Additionally, significant external surface contamination of pesticide containers collected at horticultural farms was found. This could partially account for the differences between the Exposure levels of field and laboratory experiments for liquid formulations.
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potential Dermal Exposure in greenhouses for manual sprayers analysis of the mix load application and re entry stages
Science of The Total Environment, 2010Co-Authors: Laura M Ramos, Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier M Montserrat, Giselle A QuerejetaAbstract:Abstract An evaluation of the Potential Dermal Exposure for the mix/load, application and re-entry stages, associated with procymidone and deltamethrin usage, was carried out for tomatoes grown in greenhouses of small production units in Argentina. Eight experiments were done with four different operators, under typical field conditions with a lever operated backpack sprayer. The methodology applied was based on the Whole Body Dosimetry technique, evaluating a set of different data for the mix and load, application and re-entry operations. These results indicated that the Potential Dermal Exposure of the application step was (38 ± 17) mL h − 1 with the highest proportion on torso, head and arms. When the three stages were compared, re-entry was found to contribute least towards the total Potential Dermal Exposure; meanwhile in all cases, except one, the mix/load operation was the stage with highest Exposure. The Margin of Safety for each different operation was also calculated and the proportion of pesticide drift from the greenhouse to the environment is presented. These results emphasize the importance of improving the personal protection measures in the mix and load stage, an operation that is not usually associated with high-risk in small production units.
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potential Dermal Exposure to deltamethrin and risk assessment for manual sprayers influence of crop type
Science of The Total Environment, 2008Co-Authors: Enrique A Hughes, Andrea P Flores, Laura Ramos, Anita Zalts, Richard C Glass, Javier M MontserratAbstract:Abstract A comparison of the Potential Dermal Exposure (PDE) of workers to the insecticide deltamethrin was made as a function of crop type, in small agricultural production units in Argentina. Seven experiments were done with two different crops (maize and broccoli, treated area between 600 and 1000 m 2 ) with three different operators under typical field conditions using a lever operated knapsack. The methodology is based on the whole body dosimetry technique, presenting separately the data for mixing/loading and application activities. These results indicate a higher concentration of pesticide in lower body sections for broccoli and a wider distribution for maize. The risk inherent in these agricultural procedures is estimated through Margin of Safety (MOS) values and was found to be generally safe. Preliminary results of a mass balance distribution of the pesticide between crop, soil and operator are also presented.
-
analytical method for assessing potential Dermal Exposure to captan using whole body dosimetry in small vegetable production units in argentina
Pest Management Science, 2006Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M MontserratAbstract:An analytical method has been developed that can be used to determine the potential Dermal Exposure (PDE) of workers to the pesticide captan in small-scale horticultural production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential Dermal Exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied. Copyright © 2006 Society of Chemical Industry
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analytical method for assessing potential Dermal Exposure to captan using whole body dosimetry in small vegetable production units in argentina
Pest Management Science, 2006Co-Authors: Enrique A Hughes, Andrea P Flores, Anita Zalts, Javier Ojeda, Richard Glass, Javier M MontserratAbstract:An analytical method has been developed that can be used to determine the potential Dermal Exposure (PDE) of workers to the pesticide captan in small-scale horticultural production units. The methodology is based on the whole body dosimetry technique, using a cotton coverall and cotton gloves as sampling media, with protective clothing worn beneath the cotton media to protect the operator. The quantitative determination of captan was done by gas chromatography-electron capture detector (GC-ECD), with the analytical method validated by measuring limits of detection and quantification, linear ranges, sample recovery and precision. Special emphasis is placed on factors that affected the stability of captan during chromatographic determination. The data generated for potential Dermal Exposure are presented separately for mixing/loading and application activities. These data are compared with values obtained with visible tracers using a similar field technique. Margin of safety (MOS) values are also calculated for the agricultural procedures studied.
Gan Zhang - One of the best experts on this subject based on the ideXlab platform.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n=54) and surface sediment (n=54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑OCPs concentrations ranged from 13.61 to 1992.18ng/g dry weight and 12.89 to 128.16ng/L with predominance of β-endosulfan and p,p'-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p'-DDT/p,p'-DDT, (DDE+DDD)/∑DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be >1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E-05 to 2.48E-02 (acceptable limit; <1). However, the calculated carcinogenic risk possessed by OCPs through Dermal Exposure ranged from 1.39E-10 to 1.98E-05 that highlighted the considerable carcinogenic risk associated to aldrin, dieldrin, p,p'-DDT and β-endosulfan at certain studied sites. Therefore, the high levels of ecological risk and carcinogenic human health risk had emphasized an immediate elimination of ongoing OCPs addition in the studied area.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:Abstract This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n = 54) and surface sediment (n = 54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑ OCPs concentrations ranged from 13.61 to 1992.18 ng/g dry weight and 12.89 to 128.16 ng/L with predominance of β-endosulfan and p,p′-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p′-DDT/p,p′-DDT, (DDE + DDD) / ∑ DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be > 1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E − 05 to 2.48E − 02 (acceptable limit;
Adeel Mahmood - One of the best experts on this subject based on the ideXlab platform.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n=54) and surface sediment (n=54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑OCPs concentrations ranged from 13.61 to 1992.18ng/g dry weight and 12.89 to 128.16ng/L with predominance of β-endosulfan and p,p'-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p'-DDT/p,p'-DDT, (DDE+DDD)/∑DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be >1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E-05 to 2.48E-02 (acceptable limit; <1). However, the calculated carcinogenic risk possessed by OCPs through Dermal Exposure ranged from 1.39E-10 to 1.98E-05 that highlighted the considerable carcinogenic risk associated to aldrin, dieldrin, p,p'-DDT and β-endosulfan at certain studied sites. Therefore, the high levels of ecological risk and carcinogenic human health risk had emphasized an immediate elimination of ongoing OCPs addition in the studied area.
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organochlorine pesticides across the tributaries of river ravi pakistan human health risk assessment through Dermal Exposure ecological risks source fingerprints and spatio temporal distribution
Science of The Total Environment, 2018Co-Authors: Mujtaba Baqar, Yumna Sadef, Sajid Rashid Ahmad, Adeel Mahmood, Gan ZhangAbstract:Abstract This study monitored the human health risks through Dermal Exposure, hazardous risks to ecological integrity, contamination levels, spatio-temporal distribution, and congener specific analysis of organochlorine pesticides (OCPs) across River Ravi and its three northern tributaries (Nullah Bein, Nullah Basanter and Nullah Deg). The residual levels of OCPs isomers were screened for water (n = 54) and surface sediment (n = 54) samples from twenty seven sampling sites in two alternate seasons (pre-monsoon and post-monsoon). The ∑ OCPs concentrations ranged from 13.61 to 1992.18 ng/g dry weight and 12.89 to 128.16 ng/L with predominance of β-endosulfan and p,p′-DDT in sediment and water matrixes, respectively. Distribution pattern revealed significantly higher concentrations in upstream and midstream, suggesting considerable transboundary OCPs pollution. Calculated ratios of α-HCH/γ-HCH, o,p′-DDT/p,p′-DDT, (DDE + DDD) / ∑ DDTs and cis/trans-chlordane for water and sediments identified the fresh addition of lindane, technical DDTs and chlordane in the study area. Risk quotient (RQ) based ecological risk was found to be > 1 at all studied streams during both seasons and elucidates higher risks for endosulfan (α-endosulfan) and endrin. Human health risk assessment indicated absence of hazardous (non-carcinogenic) risk through bathing in studied streams; as the hazard index values ranged from 1.09E − 05 to 2.48E − 02 (acceptable limit;