Acute Toxicity Study Articles & Analysis
17 articles found
CONTROLS PESTICIDE AND OTHER CHEMICAL TOXICITY. ? DESTROYS AND DEGRADES THE TOXINS IN A UNIQUE EFFICIENT MANNER. ? ...
Toxicological evaluation of cosmetics involves different types of tests depending on the product's application, such as acute toxicity studies, skin irritation studies, eye irritation studies, and sensitization studies. Acute toxicity studies ...
Abstract : This paper statistically evaluates the sensitivity of the acute Daphnia magna bioassay in comparison to that of two crustacean microbiotests : the Streptoxkit F and the Thamnotoxkit F, which make use of larvae of the anostracans Streptocephalus proboscideus and Thamnocephalus platyurus respectively, hatched from cysts. Regression equations were calculated for 146 data ...
EPA states that the goal of the pilot program is to “evaluate the utility and acceptability of the GHS Mixtures Equation as an alternative to animal oral and inhalation toxicity studies for pesticide formulations.” For this pilot program, EPA is requesting submission of acute oral and acute inhalation ...
Acute toxicity differs between species but also varies within a species. Important intraspecific factors are the exposure duration and properties of the animal such as life stage, sex, and physiological status. In the present study, the acute toxicity of water‐soluble fractions (WSFs) from fresh and ...
In this study we examined the effects of chronic exposure of eastern oyster (Crassostrea virginica) larvae to the water‐accommodated fractions of fresh and weathered oils collected from the Deepwater Horizon (DWH) incident, with and without additions of the dispersant Corexit 9500A, as well as to solutions of Corexit alone. ...
The autochthonous toad Rhinella arenarum was selected to study the acute toxicity of As and the biochemical responses elicited by the exposure to As in water during its embryonic development. The LC50 value averaged 24.3 mg/L As and remained constant along the embryonic development. However, As toxicity drastically decreased when ...
Environmental safety assessments for exposure of birds require the provision of acute avian toxicity data on both the pesticidal active substance and formulated products. ...
Increasing salinity has been shown to decrease the bioavailability and toxicity of other metals to aquatic organisms. In this study, acute Ni toxicity experiments (96‐h) were conducted at various salinities (0‐36 ppt) in order to determine the effects of salinity on Ni toxicity to two euryhaline fish species, ...
The relationship between total cholinesterase activity (TChE) and mortality in four butterfly species (great southern white [Ascia monuste], common buckeye [Junonia coenia], painted lady [Vanessa cardui], and julia butterflies [Dryas julia]) was investigated. Acute contact toxicity studies were conducted to evaluate the response (median lethal ...
Our studies examined the acute toxicity, the natural bioactive compounds contained in the aqueous leaf extract (ESera) and its actions on the electrocardiogram. ...
The current terrestrial risk assessment of insecticides regarding nontarget arthropods considers exclusively beneficial organisms, whereas herbivorous insects, such as grasshoppers, are ignored. However, grasshoppers living in field margins or meadows adjacent to crops may potentially be exposed to insecticides due to contact or ingestion of contaminated food. Therefore, the present study ...
The desire to reduce human exposure to toxic chemicals associated with consumer products that are marketed globally demands the creation of comparative toxicity assessment tools that are based on uniform thresholds of acceptable risks and guidelines for materials use across international boundaries. The Toxic Potential Indicator (TPI) is a ...
The cost savings from the use of the existing power plant intake and outfall facilities would be over 25%, resulting in a significant net benefit with or without the power plant in operation. Recent studies of wedge-wire screens in Santa Cruz, California indicate that this type of open intake may prove to be a viable alternative for dramatic reduction in impingement and ...
EPA notes several concerns it has with this argument. First, the acute toxicity studies that are routinely submitted with pesticide registration applications do not evaluate the effects of repeated low levels of exposure, and the only endpoints measured are mortality and clinical signs. In addition, acute ...
Abstract: An evaluation of sediment toxicity at Lake Orta, Italy was conducted to compare a toxicity test battery of 6 assays and to evaluate the extent of sediment contamination at various sediment detphs. ...
Some pesticides contain active ingredients that have been shown to act as hormone disruptors in acute and chronic toxicity studies, possibly causing loss of fertility, carcinogenesis and mutagenesis. ...