Fires in the ecosystems of Central Kazakhstan trigger a pyrogenic succession for 1-2 decades as usual. In recent years, changes climate and land use region have led to intensification fires gradual steppification territory, where desert vegetation was previously successfully restored. We analyzed change aboveground phytomass stocks during 40 years succession. zonal communities, reaches backgrou...

Volunteers infected with Salmonella typhosa develop a remarkable hyperreactivity to the pyrogenic and subjective toxic activities of homologous (S. typhos) and heterologous (Pseudomonas) endotoxins. The present studies quantitate this augmented reactivity and demonstrate by three differing approaches that significant tolerance to these endotoxins can be readily induced within the framework of t...

Variation in dormancy thresholds among species is rarely studied but may provide a basis to better understand the mechanisms controlling population persistence. Incorporating dormancy-breaking temperature thresholds into existing trait frameworks could improve predictions regarding seed bank persistence, and subsequently species resilience in response to fire, climate change and anthropogenic m...

Romanovsky, Andrej A., Andrei I. Ivanov, and Elena K. Karman. Blood-borne, albumin-bound prostaglandin E2 may be involved in fever. Am. J. Physiol. 276 (Regulatory Integrative Comp. Physiol. 45): R1840–R1844, 1999.— Although the involvement of blood-borne PGE2 in fever has been hypothesized by several authors and has substantial experimental support, the current literature often rejects this hy...

Petroleum hydrocarbon pollution is one of the most serious problems facing by many developing countries including Malaysia. One class of petroleum hydrocarbon is Polycyclic Aromatic Hydrocarbons (PAHs). PAHs are made up of large group of compounds but semi volatile comprising of 2 to 7 rings are considered toxic to human health. There are 16 semi-volatile PAHs classified as priority pollutants ...

Healthy male volunteers were rendered tolerant to the pyrogenic and toxic activities of bacterial endotoxin by daily intravenous injections. Five subjects were given 0.5 microg Salmonella typhosa endotoxin for 7 days; four subjects were given Pseudomonas endotoxin, increasing over a period of 30 days from 25 to 250 microg. Reticuloendothelial system (RES) phagocytic activity was assessed by ser...

The aim of this study was to investigate changes in selected parameters of cellular immune response in the conditions of endotoxin fever and pyrogenic tolerance in pigeons. On the first day of observation the experimental birds (n = 18) were intravenously injected with Escherichia coli LPS at a dose of 10 microg/kg b.w., while the control animals (n = 6) received apyrogenic physiological saline...