16 research outputs found
4-OH-TEMPO prevents the morphological alteration of rat thymocytes primed to apoptosis by oxidative stress inducer ButOOH
Thymocytes exposed to the pro-oxidant tert–butyl-hydroperoxide (ButOOH) display
a number of dramatic changes in morphology similar to those observed in
the case of dexamethasone-treated cells. Both reagents induce nuclear chromatin
peripheral aggregation below the nuclear membrane. Some nuclei themselves
break up producing two or more fragments. ButOOH-treated cells are
morphologically characterised by cell shrinkage, extensive surface blebbing and,
finally, fragmentation into membrane–bound apoptotic bodies composed of
cytoplasm and tightly packed with or without nuclear fragments. An increased
level of lipid hydroxyperoxides was detected after exposure of thymocytes to
ButOOH. Both oxidative stress markers and morphological damage to cells were
prevented by the antioxidant 4-OH-TEMPO
Selected aspects of wintering of Mistle Thrush Turdus viscivorus in the Kozienice Forest
The case of using underground burrow by the forest dormouse Dryomys nitedula during mating season in the Koneckie Forest
Bird habitats – the subject of protection in the Special Protection Areas of Birds Natura 2000
Echometric surveys of salt caverns filled with gas by means of the Echosonda Chemkop sonar
Metoda echometryczna pozwala na pomiar wielkości i kształtu kawernowych podziemnych magazynów gazu. Pomiary ultradźwiękowe w gazie wymagają prawidłowego przystosowania aparatury pomiarowej oraz opracowania odpowiedniej metodyki pomiaru. Dzięki zastosowaniu Echosondy CHEMKOP, do końca 2016 roku z sukcesem wykonano 9 pomiarów echometrycznych kawern zlokalizowanych w złożach soli wypełnionych gazem ziemnym pod ciśnieniem. Skuteczność pomiaru potwierdzona została zarówno przy małych jak i dużych ciśnieniach. Prace zostały zrealizowane w sposób zapewniający pełne bezpieczeństwo w środowisku gazowym przy ciśnieniu głowicowym wynoszącym nawet 21 MPa.The echometric method allows to measure size and shape of underground cavern gas storages. Ultrasonic measurements in gas require proper adaptation of the measuring apparatus and development of an adequate measurement methodology. By using Echosonda CHEMKOP sonar, till the end of 2016 year, nine echometric measurements of cavern located in salt deposit filled with natural gas under pressure was made with success. Effectiveness of the measurements was proven both for low and high pressures. Works were performed in a method that ensures full safety in gas environment with the wellhead pressure reaching even 21 MPa