AIM The aim of this paper is to provide information about the concentrations of airborne bioaerosols (airborne bacteria, fungi and endotoxins) in outdoor suburban environments in Ostrava, Moravian-Silesian region, Czech Republic. METHODS The methods were based on systematic bioaerosol monitoring during one calendar year, subsequent analysis of the samples and statistical processing. The regre...

Insect pests represent a major threat to food crops and human health, therefore have be combated in several ways, including chemical methods. However, researchers demonstrated that these molecules are dangerous for the farmers, consumers environment general. For this reason, scientists permanently searched friendly alternatives such as use of bacterium Bacillus thuringiensis classified one best...

Although endotoxins have been studied intensively by competent investigators during the past several decades, exact relationships between chemical constitution and capacity to evoke characteristic reactions in mammals remain largely unknown. As ordinarily isolated, endotoxins are complexes of lipid, polysaccharide, and protein or peptide-like substances; but the proportions of each have been fo...

Well-characterized Salmonella mutants formerly used in biosynthetic studies of lipopolysaccharides were used to study the toxic portion of the complex endotoxin. Endotoxins prepared from wild types and their mutants were tested for their biological activities, including pyrogenicity, lethality, and immunogenicity. There was little difference either in the endotoxin yields or in the toxicities b...