9 research outputs found

    PLASMA AND ERYTHROCYTE CHOLINESTERASE ACTIVITIES IN CHILDREN FROM YUCATAN, MEXICO: RELATIONSHIP WITH ANTHROPOMETRY AND OBESITY

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    Objective: To examine cholinesterase activities in children from three towns in Yucatan, Mexico and their relationship with anthropometry.Methods: Plasma and erythrocyte cholinesterase a ctivities were measured in 104 children from Ticul, Merida and Progreso. Differences between gender, sampling sites and body mass index (BMI ) group  were evaluated. Weight, height, BMI, hip and waist circumferences were correlated with cholinesterase activities.Results: Significant differences in the waist circumference and BChE activity were found among sites. Children from Ticul presented higher BChE activity compared to children from the other towns. Children from Progreso had a smaller hip circumference compared to children from the other two locations. There was a high prevalence of overweight and obese children (40.3%). The results indicated that obese children had higher BChE activity respect to healthy weight children. As expected, there were also significant waist and hip circumference differences for BMI groups. The results demonstrated a positive significant correlation between BChE activity and weight, waist and hip circumference.Conclusions: These results support the hypothesized role of BChE in lipid metabolism. Because of the high prevalence of obese children in Mexico, BChE activity may be used as a biomarker in combination with anthropometry to monitor obesity.Keywords: Cholinesterase, Children, Anthropometry, Obesity

    Five-year records of mercury wet deposition flux at GMOS sites in the Northern and Southern hemispheres

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    International audienceThe atmospheric deposition of mercury (Hg) occurs via several mechanisms, including dry and wet scavenging by precipitation events. In an effort to understand the atmospheric cycling and seasonal depositional characteristics of Hg, wet deposition samples were collected for approximately 5 years at 17 selected GMOS monitoring sites located in the Northern and Southern hemispheres in the framework of the Global Mercury Observation System (GMOS) project. Total mercury (THg) exhibited annual and seasonal patterns in Hg wet deposition samples. Interannual differences in total wet deposition are mostly linked with precipitation volume, with the greatest deposition flux occurring in the wettest years. This data set provides a new insight into baseline concentrations of THg concentrations in precipitation worldwide, particularly in regions such as the Southern Hemisphere and tropical areas where wet deposition as well as atmospheric Hg species were not investigated before, opening the way for future and additional simultaneous measurements across the GMOS network as well as new findings in future modeling studies
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