2.1.Date of QMRF: 19.05.2010 2.2.QMRF author(s) and contact details: [1]Indrek Tulp Molcode Ltd. Turu 2, Tartu, 51014, Estonia [email protected] http://www.molcode.com [2]Tarmo Tamm Molcode Ltd. Turu 2, Tartu, 51014, Estonia [email protected] http://www.molcode.com [3]Gunnar Karelson Molcode Ltd. Turu 2, Tartu, 51014, Estonia [email protected] http://www.molcode.com [4]Dimitar Dobchev Molcod...

The Acute Toxic Class (ATC) Methods for the oral, dermal and inhalation routes were developed as alternatives to the respective LD/LC50 Tests. The ATC Methods use at least 40% (and up to 90%) fewer animals and their reliability with respect to classification probabilities into one of several toxicity classes is in the same order of magnitude or even better in comparison to the LD/LC50 Tests. Th...

The CHCl3-soluble extract of Piper guanacastensis (Piperaceae) was found to have noteworthy insecticidal activity to Aedes atropalpus mosquito larvae (LC50 80.5 micrograms/mL). Bioassay-guided fractionation afforded methyl 4-hydroxy-3-(3'-methyl-2'-butenyl)benzoate (1) as the major bioactive constituent (LC50 20.5 micrograms/mL). The separation of compound 1 from its transesterification artifac...

The study to evaluate the toxicity of used drilling muds (drilling wastes) and their impact on gill structure of the post larvae of tiger prawn Penaeus monodon has been done. The results showed that the 96 h LC50 of used drilling muds ranged from 30740 and 78271 ppm SPP. All toxicity values considered to be above the standard of Indonesian government (LC50≤30000 ppm SPP). Histological observati...

Toxicity of Florida mosquito larvicides and adulticides to 3-5 day old Gambusia affinis was determined in the laboratory. After 24-h exposure, the larvicides, temephos, fenoxycarb and petroleum distillates had LC50 values of 5.60, 1.05 and 593.4 ppm, respectively. After 24 h the adulticides resmethrin, fenthion, naled and malathion had LC50 values of 0.007, 2.94, 3.50 and 12.68 ppm, respectivel...

Ostracoda species are indicators of their current and past environment (paleoenvironment). The study aims to evaluate the acute chronic sensitivities a freshwater ostracod (Eucypris sp.) agricultural pesticides (a cypermethrin-based insecticide glyphosate herbicide-based formulation). Lethal concentrations (LC50) each pesticide for at 24 48 h were determined. exposure allowed assessing effects ...

INTRODUCTION The aim of the present study was to analyze the larvicidal activity of different crude extracts of Larrea cuneifolia and its most abundant lignan, nordihydroguaiaretic acid (NDGA), against Culex quinquefasciatus. METHODS Chloroform, methanol, and aqueous extracts from L. cuneifolia and NDGA were tested against larvae of Cx. quinquefasciatus under laboratory conditions. RESULTS ...