this study was accomplished to examine the efficiency of natural zeolite in preventing acute toxicity of total ammonia to huso huso. the study was performed using water static method in 96 hours. fish averaged 46 ? 5 g in weight and 22 ? 4 cm in total length were exposed to four different concentrations (15, 30, 50, 75 mgl-1) of ammonia and a group was considered as control. under stable condit...

Manure composting has gained increased acceptance by the beef cattle (Bos taurus) feedlot industry in southern Alberta, Canada. Unlike fresh manure, compost is often promoted as being "weed-free." Studies were conducted with five weed species in 1997 and thirteen in 1999 to examine the effect of feedlot manure composting on weed seed viability. Weed seeds were buried in open-air compost windrow...

Enterohemorrhagic Escherichia coli O157:H7 infection causes several hundred cases of food poisoning every year in Japan. In severe cases, this type of food poisoning can be fatal. In the present study, we examined the induction of HSP70 in E. coli O157:H7 cells at various temperatures and the thermotolerance of E. coli O157:H7 cells alone and in contaminated food following pre-heating. We evalu...

Background:Death due to acute poisoning is of medical, legal and social significance. This study was designed to investigate lethal poisonings among dead bodies referred to a regional office of Iranian Legal Medicine Organization (ILMO). Methods:This was a retrospective descriptive-analytical study on dead bodies referred to Fars province regional office of ILMO in Shiraz, Iran, during April 20...

If cells are exposed to a mixture of hydroxylamine inactivated and infectious viruses the total rate of viral RNA-replication is lower than if the cells are infected with the same number of infectious viruses alone. This inhibitory influence of inactivated viruses depends on the ratio of infectious: inactivated viruses in the inoculum. One lethal hit by hydroxylamine suffices to produce the eff...

The production of new blood cells relies on a hierarchical network of hematopoietic stem and progenitor cells (HSPCs). To maintain lifelong hematopoiesis, HSPCs must be protected from ionizing radiation or other cytotoxic agents. For many years, murine models have been a valuable source of information regarding factors that either enhance or reduce the survival of HSPCs after exposure of marrow...

background: acrylamide (c3h5no) is a vinyl monomer. this water-soluble crystalline solid is a colorless, odorless agent which is used in scientific laboratories and some industries. acrylamide has cellular oxidative effects. acute or chronic poisoning with this agent happens as a result of skin, respiratory, or oral contacts. clinical manifestations depend on the dose, duration, and frequency o...

Abstract It is well established that temperature variability affects a range of outcomes relevant to human welfare, including health, emotion and mood, productivity across number economic sectors. However, critical still unresolved empirical question whether variation has long-lasting effect on and, therefore, damages compound over time in response long-lived changes expected with climate chang...

background:death due to acute poisoning is of medical, legal and social significance. this study was designed to investigate lethal poisonings among dead bodies referred to a regional office of iranian legal medicine organization (ilmo). methods:this was a retrospective descriptive-analytical study on dead bodies referred to fars province regional office of ilmo in shiraz, iran, during april 20...

Previous studies seldom consider humidity when examining heat-related extremes, and none have explored the effects of on concurrent extremes high heat stress low river streamflow. Here, we present first global picture projected changes in compound lethal (Th)-drought hazards (CHD) across 11,637 catchments. Our observational datasets show that atmospheric conditions (e.g., energy vapor flux) pla...