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Articles by M. Shayeghi
Total Records ( 2 ) for M. Shayeghi
  M. Khoobdel , M. Shayeghi , H. Vatandoost , Y. Rassi , M.R. Abaei , H. Ladonni , A. Mehrabi Tavana , S.H. Bahrami , M.E. Najaffi , S.H. Mosakazemi , K. Khamisabadi , S. Azari Hamidian and M.R. Akhoond
  In this study, six types of current military uniforms of Iran were treated by permethrin (0.125 mg permethrin [AI] cm-2) and examined against the biting of natural population mosquitoes of rural areas of kazeroon, Fars Province, south of Iran, namely Culex and Anopheles. Eight volunteers were selected for this study. Six of them put on the treated uniforms and the other two ones wore the untreated uniforms. All the subjects participated in the night biting test for eight active nights of July and August 2004. There was no significant difference in the protection of different treated uniforms against mosquitoes biting. In this study, the average number of biting among who wore untreated uniforms (controls) was 3.21 mosquito biting/min/person (192.8 h-1). This amount was 0.26 (15.6 h-1) for who wore treated uniforms (cases). The relative protection level of treated uniforms, in comparison with untreated ones, was about 91.9%. The protection percent of treated uniforms for different species of mosquitoes, in comparison with untreated ones, was calculated through determining the species of captured mosquitoes, separately from case and control subjects. The results showed that the relative protection percent of treated uniforms against species of Culex bitaeniohynchus, Cx. tritaeniorhynchus, Cx. perexiguus, Cx. theileri and An. stephensi was 72.7, 87, 89.8, 84.3 and 78.7, respectively. The results of chemical analysis with High Performance Thin Layer Chromatography (HPTLC) method, before and after field test, showed that in two weeks of study, there hasn`t been any significant decrease in the amount of uniforms` permethrin.
  H. Nasirian , H. Ladonni , M. Shayeghi , H. Vatandoost , Y. Rassi , M.R. Yaghoobi Ershadi , J. Rafinejad and H.R. Basseri
  The duration of fipronil WHO glass jar method toxicity against twelve strains of feral German cockroaches, Blattella germanica (L.), was determined. In the WHO glass jar bioassay, the average LT50 of susceptible strain was 16.4,14.3,12.4 and 11.3 exposure minutes after 24,48,72 and 96 h, respectively and the average LT95 was 20.3,19.9,19.5 and 19.1 exposure minutes after 24,48,72 and 96 h, respectively. As with the susceptible reference strain, where LT50 was halved from 24 to 96 h, the LT50 of fipronil decreased with time in the feral German cockroach strains. LT50 varied > 8-folds from 16.2 to 24.7 exposure min at 24 h, 8.4 folds from 14.4 to 22.8 min at 48 h and almost 8.8 folds from 12.5 to 21.3 exposure minutes at 72 h. At the end of the bioassay at 96 h, LT50 varied from 11.6 to 19.7 exposure minutes, which is 1.0 and 1.7 folds exposure min higher than the standard susceptible value of fipronil. All German cockroach strains showed a similar susceptibility or very low tolerance (1.5 to 1.7 folds) to fipronil compared with the susceptible laboratory strain and the steep slopes of time exposure-mortality curves indicated that the feral German cockroach strains was homogenous in time exposures to fipronil. These results indicate that the fipronil was relatively slow-acting in WHO glass jar method bioassay, with LT50 values decreasing until 96 h and becoming stable thereafter.
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