16 research outputs found
Ethanol production potential from fermented rice noodle wastewater treatment using entrapped yeast cell sequencing batch reactor
Organophosphate pesticide exposure and dialkyl phosphate urinary metabolites among chili farmers in Northeastern Thailand
Background. Chlorpyrifos and profenofos are organophosphate pesticides (OPPs), we studied exposure and urinary metabolites
in an agricultural area in the northeastern of Thailand during the chili-growing season (March - April) in 2012.
Objective. This study was designed to assess pesticide exposure concentration through dermal and inhalation pathways and
to find and depict a relationship between urinary metabolites and means of exposure.
Materials and methods. To estimate the pesticides exposure concentration, dermal wipes (hand, face, and feet), dermal
patches and air samples were collected from 38 chili farmers. The morning void of pre and post application urine samples
was an indicator of biological monitoring in the study which derived from 39 chili farmers.
Results. Chlorpyrifos and profenofos residues were detected on dermal patches, face wipes, and hand wipe samples, while
no significant residues were found on the feet. Using a personal air sampling technique, all air samples detected pesticide
residues. However, significant correlation between dermal pesticide exposure concentration and inhalation was not found
(p>0.05). For urinary metabolite levels, there was a relationship between the first pre application morning void and post
application morning void (p<0.05); similar to the association between the first pre application morning void and the second
post application morning void (p<0.05). The main relationship between pesticide exposure and urinary metabolite was found
to have been relevant to dermal exposure (r= 0.405; p<0.05).
Conclusions. The results of this study could suggested that public health education training programs, including the use of
appropriate personal protective equipment (PPE), should be offered for the chili growing farmers in order to improve their
ability to properly use pesticides.Wprowadzenie. Chlorpiryfos i profenofos należą do pestycydów fosforoorganicznych (OPPs) stosowanych w rolnictwie, dlatego
narażenie na te związki badano w północnowschodniej Tajlandii w okresie uprawy chili (marzec – kwiecień) w 2012 roku.
Cel. Celem badania była ocena narażenia na pestycydy przez skórę i drogi oddechowe oraz zbadanie zależności pomiędzy
stężeniami metabolitów w moczu a drogą narażenia.
Materiał i metoda. Do oceny wielkości narażenia wykorzystano wymazy z rąk, twarzy i stóp i naskórne plastry absorpcyjne
oraz próbki powietrza pobierane za pomocą indywidualnych próbników u 39 rolników uprawiających chili.
Wyniki. Pozostałości chlorpiryfosu i profenofosu stwierdzano na plastrach absorpcyjnych, wymazach z twarzy i rąk,
podczas gdy w wymazach ze stóp nie stwierdzano znaczących ilości tych pestycydów. We wszystkich próbkach powietrza
stwierdzono obecność pestycydów. Jednakże, nie wykazano znaczącej korelacji pomiędzy wielkością narażenia przez skórę
i drogi oddechowe (p>0.05). W przypadku poziomów metabolitów w moczu, wykazano zależność pomiędzy poziomami
metabolitów w moczu przed i po pierwszym zabiegu wykonywanym rano (p<0.05). Zależność pomiędzy narażeniem na
pestycydy a stwierdzanymi metabolitami w moczu wynikała z narażenia przez skórę (r= 0.405; p<0.05).
Wnioski. Wyniki niniejszych badań mogą sugerować potrzebę wprowadzenia programów edukacyjnych z zakresu zdrowia
publicznego, uwzględniających stosowanie przez hodowców chili odpowiedniego sprzętu ochrony osobistej, w celu poprawy
możliwości właściwego stosowania pestycydów
Profenofos insecticide degradation by novel microbial consortium and isolates enriched from contaminated chili farm soil
Diethyl phthalate degradation by the freeze-dried, entrapped Bacillus subtilis strain 3C3
Removal of Pharmaceuticals From Aqueous Medium Using Entrapped Activated Carbon in Alginate
Cell immobilization technique for the enhanced removal of lindane using Streptomyces strains isolated from Northwestern Argentina
Lindane (γ-HCH) is an organochlorine insecticide which has a negative effect as a pollutant agent of soil, water and sediments. Nowadays it has been banned in almost all countries of the world, but its residues still remain in the environment. In this context, bioremediation, involving the use of microorganisms to degrade environmental contaminants, has received much attention as an effective biotechnological approach to clean up this kind of pollutants. Moreover, cell immobilization has been shown to present diverse advantages over conventional systems using free cells, such as the possibility of employing higher cell density, easier separation of cells from the system, repeated use of cells and better protection of cells from harsh environments. Thereby, this chapter compiles information about: 1) the advantages and limitations of the use of immobilized cells, 2) the comparison between free or immobilized cells for lindane removal by single cultures of actinobacteria, isolated from polluted environments in the northwest of Argentina, and 3) lindane removal by free and immobilized consortia of Streptomyces spp.Fil: Sáez, Juliana María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Benimeli, Claudia Susana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico - CONICET - Tucumán. Unidad de Administración Territorial; Argentina. Universidad del Norte Santo Tomás de Aquino. Facultad de Ciencias de la Salud; ArgentinaFil: Amoroso, Maria Julia del R.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; Argentina. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; Argentina. Universidad del Norte Santo Tomás de Aquino. Facultad de Ciencias de la Salud; Argentin