The screening of Chinese medicinal herbs for insecticidal principles showed that the essential oil of Echinops grijsii Hance roots possessed significant larvicidal activity against mosquitoes. The essential oil was extracted via hydrodistillation and its constituents were determined by gas chromatography-mass spectrometry (GC-MS) analysis. GC-MS analyses revealed the presence of 31 components, ...

Thirty eight bottles of red wine (Carbanet Sauvignon) were randomly selected based on vintage, region, price, and age (number of months in a barrel). The total phenolic content of each wine was determined using Folin-Ciocalteau assay. The radical scavenging activity was evaluated using 2,2-diphenyl-1-picryhydrazyl (DPPH) assay. Apart from a few bottles that exhibited above average radical scave...

BACKGROUND & OBJECTIVES Lantana viburnoides sp viburnoides var kisi is used in Tanzania ethnobotanically to repel mosquitoes as well as in traditional medicine for stomach ache relief. Bioassay-guided fractionation and subtraction bioassays of the dichloromethane extract of the root barks were carried out in order to identify the bioactive components for controlling Anopheles gambiae s.s. mosqu...

In this study, the efficacy of pyriproxyfen and spinosad, alone and in combination, was evaluated against the dengue vector Aedes aegypti (L.). Larval bioassays were carried out on susceptible mosquito larvae to determine the concentration-mortality responses of mosquitoes exposed to each insecticide alone and in mixture. Synergism between pyriproxyfen and spinosad was determined by the calcula...

Potential developmental toxicities of three different cigarette butt leachates were evaluated using the frog embryo teratogenesis assay-Xenopus (FETAX). Xenopus laevis embryos were exposed to regular cigarette butt (RCB), menthol (MCB) and electronic (ECB) in concentrations ranging from 0 to 4 butts/l for RCB and MCB and 0-10 butts/l for ECB. The embryos were from stage 8 to 11 and were exposed...

Mosquito fish (Gambusia affinis) is a species often used as bioindicator because it has high adaptability to water quality changes. Linear alkylbenzene sulfonate (LAS) surfactant found in waters and can cause death for the biota that lives it. This study aimed analyze impact of LAS on survival mosquito determine minimum concentration tissue damage. Research conducted during April 2022 using 500...

background: pesticides are widely used in agriculture. excessive use of pesticides has health risk for human and threatens non-target organisms. this research aimed to determine lethal concentrations of malathion and hinosan for carassius auratus (5±1 gr) [mean ± sd]. methods: experiments were performed according to o.e.c.d for 4 days (96 h) and concentrations of 0, 1, 2, 4, 8 mg l-1 hinosan an...

the need of aquarists for proper and safe disinfection of fish with chloramine-t (cl-t) necessitates toxico/pathologic examinations.   this study assays toxicity level of cl-t and histopathologic changes of gills, liver, kidney and brain of treated zebrafish (danio rerio). groups of 10 zebrafish were treated with 0 (control), 5, 10, 15, 30, 50,100 and 200 mg/l of cl– t. mortality was recorded a...