Wszystkie pola: Cieślik, Zbigniew - Katalog OPAC zbiorów

Tytuł:: The impact of alcohol admixture with gasoline on carbon build-up and fuel injectors performance
Autorzy:: Stępień, Zbigniew
Pielecha, Ireneusz
Cieslik, Wojciech
Szwajca, Filip
Powiązania:: https://bibliotekanauki.pl/articles/2087005.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: spark ignition combustion engine
direct injection
fuel injectors
injector coking
gasoline
alcohol
injector operating parameters
Opis:: The operating conditions of injectors in spark ignition engines with direct fuel injection make them susceptible to coking, which leads to a reduced quality of fuel atomization. This can be observed by a drop in performance and an increase in exhaust emissions, especially particulate matter. One effective method of reducing injector coking is by using detergentdispersing gasoline additives. The article describes the effect of using an admixture with a varied alcohol content on the quantitative and qualitative fuel atomization indicators. The research consisted of a 48-hour engine test, done in accordance with the CEC F-113-KC procedure (CEC-F-113 test). After each test cycle, the injectors underwent optical tests with the use of an isochoric chamber. The spray penetration and surface area were analyzed at a set of different fuel injection parameter values. The research performed resulted in determining the influence of each tested admixture on the change of injection time and on the geometric indicators of the fuel spray. The obtained characteristics of the engine in operation and conducted stationary tests enabled the operational evaluation of the impact an alcohol admixture with gasoline fuels had on key engine parameters.
Źródło:: Eksploatacja i Niezawodność; 2022, 24, 2; 226--236
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 19.

Tytuł:: The “biological chamber” method – use of autologous platelet-rich plasma (PRP) in the treatment of poorly healing lower-leg ulcers of venous origin
Autorzy:: Waniczek, Dariusz
Mikusek, Wojciech
Kamiński, Tomasz
Wesecki, Mariusz
Lorenc, Zbigniew
Cieślik-Bielecka, Agata
Powiązania:: https://bibliotekanauki.pl/articles/1395656.pdf
Data publikacji:: 2015-06-01
Wydawca:: Index Copernicus International
Tematy:: chronic lower-leg venous ulcer
autologous platelet-rich plasma
Opis:: Wound healing is a complex pathophysiological process, in which platelets play a crucial role. Platelet alpha-granules release growth factors to the wound bed; the factors are necessary in the healing process. In chronic wounds, such as poorly healing lower-leg ulcers of venous origin, there is decreased activity of multiple growth factors, so the concept of exogenous delivery of such factors seems a logical strategy. Platelet-rich plasma therapy in patients with lower-leg ulcers of venous origin combined with conventional treatment methods (previously ineffective in these patients) seems, based on our observation, an important adjunct leading to recovery. The aim of the study was to present an original method of autologous platelet-rich plasma application through the creation of a sort of “biological chamber” containing a concentrate of growth factors. Material and methods. The described therapy was implemented in 10 patients, who had been ineffectively treated for more than one year in the outpatient setting. Patients with exacerbation of inflammatory process, signs of wound infection and ankle brachial pressure index < 0.8 were excluded from the study. After the application of platelet-rich plasma, further treatment was continued with the use of moist therapy and compression therapy according to a uniform regimen. Results. Complete healing was achieved within 4-10 weeks from the beginning of the product administration in all patients. Conclusion. The presented method seems technically simple, effective and relatively inexpensive
Źródło:: Polish Journal of Surgery; 2015, 87, 6; 283-289
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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