INCREASING THE CURRENCY RESISTANCE OF CYLINDER-PLASTING OF PYSTON PUMPS BY PLASMA METHOD

The article examines the study of increasing the wear resistance of the cylinder-sleeve of a piston pump using the developed technology of plasma spraying. Wear-resistant and durable coatings of nickel, chromium, molybdenum and tungsten were obtained on the surface of the piston pump cylinder-sleeve. A graph of the dependence of the coating thickness depending on the surface hardness of the cylinder-sleeve is presented. According to the graph, depending on the hardness, you can determine the wear resistance of the coating surface of the cylinder-sleeve. Keywords: piston pump, cylinder liners, plasma method, nickel, chromium, molybdenum, tungsten, wear resistance, coating thickness, hardness, graphical dependence

Synthesis of Zinc Oxide (ZnO) Nanoparticle using Non-Transferred DC Thermal Plasma Method: A Morphology Review

The increase of nanomaterialusagesuch as nano-ZnO application indeveloping countries is a type of progressthat is beneficial from the engineering standpoint.Being able to controlthe results of nanomaterial production is crucialin this development. To control the outcome is to obtainZnO nanomaterialsproperties which are suitable and in accordance to its intended application.Thisstudy focuses on the morphology ofZnO nanomaterialswhich aresynthesized by non-transferred DC thermal plasmamethod. In this review,parameters of the apparatus regulating the outcomes of the synthesisis studied and analyzed to find certain guidelines that affect nanomaterial morphology. Some of the findings includethe influence ofnon-transferred DC thermal plasma torches main variables such as gas output and powerinputwhich are involved in plasma jet production. It also finds precursor input techniques in which affects the ZnO nanomaterial production outcome. The study indicates that each production parameters on the DC thermal plasma device have different ways in affecting the morphology of the synthesized nanomaterialand it is possible to control them

A Novel Method for Accurate Quantification of Split Glomerular Filtration Rate Using Combination of Tc-99m-DTPA Renal Dynamic Imaging and Its Plasma Clearance

Purpose. To precisely quantify split glomerular filtration rate by Tc-99m-DTPA renal dynamic imaging and plasma clearance in order to increase its consistency among doctors. Methods. Tc-99m-DTPA renal dynamic imaging was performed according to the conventional radionuclide renal dynamic imaging by five double-blinded doctors independently and automatically calculated split GFR, namely, gGFR. Moreover, the conventional radionuclide renal dynamic imaging was assessed to only outline the kidney, blank background, and automatically calculated split GFR, gGFR ′ . The total GFR value of patients, tGFR, was obtained by the double-plasma method. According to the formula, Precise GFR pGFR = gGF R ′ / gGF R ′ + gGF R ′ × tGFR . The precise GFR value of the divided kidney, pGFR, was calculated. The Kendall’s W test was used to compare the consistency of gGFR and pGFR drawn by five physicians. Results. According to Kendall’s W consistency test, Kendall’s coefficient of concordance was 0.834, p = 0.0001 using conventional method. The same five doctors used blank background again and the same standard Gates method to draw the kidneys, which automatically calculated gGFR ′ . Using input formula, the pGFR was calculated and Kendall’s W consistency test ( Kendal l ’ s coefficient of concordance = 0.956 , p = 0.0001 ). Conclusion. The combination of Tc-99m-DTPA renal dynamic imaging combined with the double-plasma method could achieve accurate split GFR, and because of the omission of influence factors, the consistency of pGFR obtained by different doctors using this method was significantly higher than that of conventional Tc-99m-DTPA renal dynamic imaging.