Introduction: One of the protective concepts in the interpretation of radiation damage in radiobiology is the radioadaptive response. The objective of this present report is to evaluate the induction of radioadaptive response in male rats by injection of pre-irradiated serum with low doses X-radiation intraperitoneally.   Materials and Methods: 80 male adul...

In view of suggested anti diabetic potential, effect of aqueous and cold extracts of Terminalia Catappa Linn (Combretaceae) leaves, on fasting blood sugar levels and serum biochemical analysis in alloxan-induced diabetic rats was investigated. All the extracts of Terminalia Catappa produced a significant anti diabetic activity at dose levels of 1/5th of their lethal doses. Concurrent histologic...

dorema aucheri is a plant that grows in iran. in persian it is called (bilhar). this experimental study was carried out at ferdowsi university of mashhad in 2014. after collection and preparation of aqueous and ethanolic extracts of dorema aucheri (bilhar), the antibacterial activity of ethanolic and aqueous extracts of bilhar was evaluated against 7 laboratory strains of microorganisms, includ...

objective: chlorpyrifos (cpf) is a neurotoxic organophosphorus (op) insecticide. its mechanism of action includes oxidative stress, excitotoxicity, and inhibition of the acetylcholinesterase enzyme (ache). the aim of the present study is to investigate cpf toxicity in mature and immature cerebellar granule neurons (cgns), as well as its effect on glutamate induced excitotoxicity. materials and ...

background: the irritant effect of some insecticides can cause a proportion of mosquitoes to leave the sprayed rooms before acquiring a lethal dose, so the repeated contact al sub-lethal dose may lead to extent the resistance. methods: larvae and pupae of culex pipiens complex were collected in mass from open canals of waste water in capital city tehran and reared to obtain the first generation...

objective(s):electromagnetic radiations which have lethal effects on the living cells are currently also considered as a disinfective physical agent.   materials and methods: in this investigation, silver nanoparticles were applied to enhance the lethal action of low powers (100 and 180 w) of 2450 mhz electromagnetic radiation especially against escherichia coli atcc 8739. silver nanoparticles ...

The distribution of mutational fitness effects (DMFE) is crucial to the evolutionary fate of quasispecies. In this article we analyze the effect of the DMFE on the dynamics of a large quasispecies by means of a phenotypic version of the classic Eigen's model that incorporates beneficial, neutral, deleterious, and lethal mutations. By parameterizing the model with available experimental data on ...

The statistical techniques for studying the population dynamics of recessive lethal genes were developed mainly by Wright,'-' who studied the distribution of gene frequencies in populations. In reality, however, the frequencies of individual lethal genes cannot be observed but the frequency of lethal-bearing chromosomes is determined. In large populations the random fluctuation of the frequency...