H2S gas when exposed to metal can be responsible for both general and localized corrosion, which depend on several parameters such as H2S concentration and the corrosion product layer formed.Therefore, the formation of passive film on 316L steel when exposed to H2S environment was investigated using several analysis methods such as FESEM and STEM/E
Slotted shell resilient elements for drilling shock absorbers
The new design of a resilient element for application in drilling devices of tg02-0325m vibration protection is presented.A cylindrical shell with a cut along its generatrix is the peculiarity of the proposed design.The presented resilient element has high loaded and damping properties upon cross dimension hard restriction condition.Besides, the de
Printed Posters as a Source for the Study of the Social and Political Processes in Ukraine in the 1920-ies
The paper addresses the role of printed posters as visual sources for studying social and political processes in the 1920-ies.It allows to consider the idea that the Ukrainian society, under the influence of the bolsheviks propaganda, enthusiastically started to build a new society, as incorrect one.Without denying the impact of propaganda in the l
Characterization of Insertional Variation of Porcine Endogenous Retroviruses in Six Different Pig Breeds
Pigs may need to be exploited as xenotransplantation donors due to the shortage of human organs, tissues and cells.Porcine endogenous retroviruses (PERVs) are a significant obstacle to xenotransplantation because they can infect human cells in vitro and have the potential for transmission of unexpected pathogens to humans.In this research, 101 pigs