نتایج جستجو برای: lethal concentration
تعداد نتایج: 421535 فیلتر نتایج به سال:
Bendiocarb is a broad-spectrum insecticide recommended for malaria control by the World Health Organization (WHO). Still, bendiocarb poses toxic risk to populations of nontargeted aquatic organisms. Thus, our study was aimed evaluate sub-lethal effects exposure on zebrafish (Danio rerio) embryos assessing physiological, developmental, and biochemical parameters. Bendiocarb-induced adverse embry...
nowadays, air pollution is a global problem that has had significant growth by technology development, population growth andindustrial development. industrial development brought natural resources deterioration, more manufacturing products, and more environmental pollutants. if pollutant won’t be controlled, human-being and wildlife will face the critical risks. significant release and critical...
Lethal injections have been increasingly employed in China nowadays. Due to the lack of specific institutions in China’s legislation, there is no universal and definite standard for the options and execution procedure of lethal injections, causing lots of problems. Therefore, an option for lethal injections should be established and relevant execution procedure should be further improved as well.
background: the development of toxicity tests regarding toxic responses of different fish species could be more effectively used in predictive toxicology and risk assessment. in this study lethal concentrations (lc50-96 h) values of copper sulphate an important toxic industrial pollutant, on capoeta fusca were determined. behavioral changes at different concentrations of cuso4 were determined f...
Protective Effects of Zeolite (Clinoptilolite) on Copper Toxicity in Tilapia (Oreochromis niloticus)
In this study, the protective effect of zeolite added to water on tilapias exposed sub-lethal concentration copper was investigated. Treatments were copper, + zeolite, and control. During experiment, fish growth by weight length, accumulation in liver, muscle protein ratios measured. BUN, LDH, glucose, cholesterol, triglyceride parameters blood also measured taken monthly samples. The greatest ...
Four synthetic peptides (Peptidyl MIMs; Demeter Biotechnologies, Inc.) were evaluated for their in vitro activity against Acholeplasma laidlawii. Fifty percent effective concentration values ranged from 1 to 15 microM. Three of these compounds are more lethal than cecropin B against A. laidlawii.
Three independent trials were conducted using mortality and burial as endpoints. Amphipod mean lethal concentration to 50% (LC50) was 227 microg/L. One-hour burial as a sublethal endpoint increased the sensitivity of the toxicity test by 40%; however, most amphipods that survived exposure were able to recover within 24 to 48 h. This toxic hangover was dose-dependent.
The present paper deals with the effect of endosulfan on Ascorbic acid content in the alimentary canal of Heteropneustes fossilis. This fish exposed so sub lethal concentration of endosulfan for a period of one month. The results revealed that the ascorbic acid content of alimentary canal was decreased in intoxicated fishes.
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