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3 result(s) for "Arias, M Helena Jahuira"
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Arsenic exposure in drinking water: an unrecognized health threat in Peru
To assess the extent of arsenic contamination of groundwater and surface water in Peru and, to evaluate the accuracy of the Arsenic Econo-Quick(™) (EQ) kit for measuring water arsenic concentrations in the field. Water samples were collected from 151 water sources in 12 districts of Peru, and arsenic concentrations were measured in the laboratory using inductively-coupled plasma mass spectrometry. The EQ field kit was validated by comparing a subset of 139 water samples analysed by laboratory measurements and the EQ kit. In 86% (96/111) of the groundwater samples, arsenic exceeded the 10 µg/l arsenic concentration guideline given by the World Health Organization (WHO) for drinking water. In 56% (62/111) of the samples, it exceeded the Bangladeshi threshold of 50 µg/l; the mean concentration being 54.5 µg/l (range: 0.1-93.1). In the Juliaca and Caracoto districts, in 96% (27/28) of groundwater samples arsenic was above the WHO guideline; and in water samples collected from the section of the Rímac river running through Lima, all had arsenic concentrations exceeding the WHO limit. When validated against laboratory values, the EQ kit correctly identified arsenic contamination relative to the guideline in 95% (106/111) of groundwater and in 68% (19/28) of surface water samples. In several districts of Peru, drinking water shows widespread arsenic contamination, exceeding the WHO arsenic guideline. This poses a public health threat requiring further investigation and action. For groundwater samples, the EQ kit performed well relative to the WHO arsenic limit and therefore could provide a vital tool for water arsenic surveillance.
Análisis del índice de temperatura-humedad sobre la mortalidad y el peso corporal de cuyes (Cavia porcellus) de la línea sintética en Moquegua, Perú
En este estudio se analizó la relación de la temperatura (T), humedad relativa (HR) e índice de temperatura-humedad (ITH) sobre la mortalidad y el peso corporal de cuyes (Cavia porcellus) de la línea sintética en la ciudad de Moquegua, Perú. Para ello, se evaluaron 157 cuyes entre octubre del 2019 y marzo del 2020, a través del análisis de la variabilidad y los niveles de asociación entre T, HR, ITH, mortalidad y peso. Los datos fueron procesados en STATA IC14. Los resultados de T, HR e ITH registrados mensualmente mostraron cambios altamente significativos (p < 0,001), al igual que el peso entre machos y hembras (p < 0,05). Los coeficientes de correlación estadísticamente significativos se hallaron entre el peso de cuyes machos y T a la semana 4 (r = -0,345) y a la 6 (r = -0,352); HR, a la semana 4 (r = -0,388) y a la 6 (r = -0,387); e ITH, a la semana 4 (r = -0,387) y a la 6 (r = -0,374). No se demostró correlación entre la mortalidad e ITH (p > 0,05); además, se observó un incremento en la mortalidad en situación de estrés (ITH > 72). El incremento de peso de cuyes machos mostró tendencia lineal a ITH ≤ 72 (r2 = 0,993) e ITH > 72 (r2 = 0,994). De igual manera, el incremento de peso de las hembras mostró tendencia lineal a ITH ≤ 72 (r2 = 0,996) e ITH > 72 (r2 = 0,997).
Arsenic exposure in drinking water: an unrecognized health threat in Peru/Exposition a l'arsenic dans l'eau potable: une menace meconnue pour la sante au Perou/Exposicion al arsenico en el aqua potable: una qran amenaza inadvertida para la salud en Peru
Metodos Se recogieron muestras de agua de 151 suministros de agua en 12 distritos de Peru, y se midieron las concentraciones de arsenico en el laboratorio por medio de una espectrometrfa de masas de plasma con acoplamiento inductivo. El kit de campo EQ se valido mediante la comparacion de un subconjunto de 139 muestras de agua analizadas por mediciones de laboratorio y el kit EQ.