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Wash resistance and bio-efficacy of Olyset~? Plus, a long-lasting insecticide-treated mosquito net with synergist against malaria vector, Anopheles stephensi

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Asian Pacific Journal of Tropical Medicine 2017年第9期10卷 887-891页

作者： Soraya Sheikhi Hassan Vatandoost Mohammad Reza Abai Mansoreh Shayeghi Ahmad Raeisi Morteza akbari Fatemeh Nikpoor Mohammad Sistanizade Aghdam akbar bagheri Department of Medical Entomology&Vector Control School of Public HealthTehran University of Medical SciencesTehranIran Department of Environmental Chemical Pollutants and Pesticides Institute for Environmental ResearchTehran University of Medical SciencesTehranIran Department of Malaria CDCMinistry of Health&Medical EducationIran

Objective: To determine the wash resistance of Olyset~? Plus using World Health Organization Pesticide Evaluation Scheme standard washing procedure and to assess the value of knock down and mortality rates of Anopheles stephensi at different regimens of long lasting insecticide treated nets ***: The study was conducted at the Bioassay Laboratory of Culicidae Insectary,School of Public Health, Tehran University of Medical Sciences, Iran. The net was made of polyester impregnated with permethrin and piperonyl butoxide at a ratio of 2:1. The washing resistance was assessed using Le Chat?soap and a shaker incubator set at a speed of 155 r/min, 30℃ for 10 min. The cone bioassay test was carried out according to World Health Organization recommended guideline with tolerant field strain of female Anopheles stephensi to ***: The knockdown and mortality rates of female mosquitoes exposed to Olyset~? Plus from un-washed nets to 2 washings were 79.7% and 88.8% respectively. Mortality was dropped to zero while active ingredient estimated 0.532 mg/100 cm^2 to 0.481 mg/100 cm^2 after 15 washings. A positive correlation was seen between residues of permethrin on nets, knockdown rate and mortality rate of female Anopheles stephensi exposed to different regimes of washed Olyset~? Plus(r = 0.954, P = 0.001).Conclusions: It is recommended that a preliminary survey conducted on resistance level of Anopheles vectors before the distribution of Olyset~? Plus in malaria endemic communities.

关键词： Long-lasting nets Permethrin Wash resistance Residue Anopheles stephensi

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Separation/Enrichment of Copper and Silver Using Titanium Dioxide Nanoparticles Coated with Poly-Thiophene and Their Analysis by Flame Atomic Absorption Spectrophotometry

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American Journal of Analytical Chemistry 2013年第2期4卷 90-98页

作者： Mohammad Behbahani Meysam Babapour Mostafa M. Amini Omid Sadeghi akbar bagheri Mani Salarian Banafsheh Rafiee Department of Chemistry Islamic Azad University Shahr-e-Rey Branch Tehran Iran Department of Chemistry Shahid Beheshti University Tehran Iran

We report on the use of titanium dioxide nanoparticles (NPs) coated with poly-thiophene for the preconcentration of copper and silverions. The NPs were prepared by first modifying the surface of TiO2 NPs with vinyl groups and then copolymerizing them with vinyl thiophen. The resulting TiO2-polythiophene core-shell NPs were characterized by thermogravimetry, differential thermal analysis, scanning electron microscopy, Fourier transform infrared spectrometry and X-ray diffraction. The experimental conditions such as pH value, adsorption and desorption time, type, concentration and volume of the eluent, break through volume, and effect of potentially interfering ions were optimized. The ions were then desorbed with hydrochloric acid and determined by FAAS. The limits of detection are 0.4 and 1.2 μg·L_1 for Cu(II) and Ag(I), respectively, and recoveries and precisions are >98.0%

关键词： Novel Poly-Thiophene-TiO2 Nanoparticles Copper Silver Flame Atomic Absorption Spectrophotometry

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