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Wyszukujesz frazę "Krzaczek, Maciej" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
The importance of obesity and carbohydrate metabolism disorders on the course of gastroesophageal reflux disease – a pilot study
Autorzy:
Pardak, Piotr
Filip, Rafał
Krzaczek, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2203254.pdf
Data publikacji:
2022-05-31
Wydawca:
Gdański Uniwersytet Medyczny
Tematy:
obesity
gastroesophageal reflux disease
diabetes mellitus
Opis:
BackgroundCarbohydrate metabolism disorders, obesity and a severe course of gastroesophageal reflux correlate with more frequent development of esophageal complications. The aim of this study was to assess the influence of obesity and carbohydrate disorders on the characteristics of gastroesophageal reflux disease (GERD).Material and methodsThe study included 58 patients with excess weight. Anthropometric parameters (including the body mass index, BMI), data regarding GERD (severity of symptoms, gastroscopy and esophageal pH monitoring results) were included in the study. Correlations between obesity and GERD parameters were analyzed. Subjects were divided into a diabetic and a control group and the severity of GERD was compared.ResultsGERD was diagnosed in 40 patients and occurred more frequently in the obese group (73%) than in the overweight group (57%). Increased GERD severity was associated with increased BMI only for postprandial parameters. GERD was diagnosed in most of the group with carbohydrate disorders (78% vs 63% in the non-diabetic group). No differences in the severity of GERD were observed between groups depending on carbohydrate disorders.ConclusionsIn our study, GERD was common in obesity and in diabetic disorders. Increased severity of postprandial reflux was associated with an increased BMI. Diabetic disorders were not associated with more severe GERD.
Źródło:
European Journal of Translational and Clinical Medicine; 2022, 5, 1; 17-26
2657-3148
2657-3156
Pojawia się w:
European Journal of Translational and Clinical Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study of combustion and emissions of diesel engine fuelled with FAME and HVO
Autorzy:
Hunicz, Jacek
Krzaczek, Paweł
Gęca, Michał
Rybak, Arkadiusz
Mikulski, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/2097506.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
diesel engine
renewable fuels
HVO
hydrotreated vegetable oil
emissions
silnik Diesla
paliwa odnawialne
hydrorafinowany olej roślinny
emisje
Opis:
This study investigates combustion and emission characteristics of a contemporary single-cylinder compression ignition engine fuelled with diesel, fatty acid methyl esters (FAME) and hydrotreated vegetable oil (HVO). These two drop-in fuels have an increasing share in automotive supply chains, yet have substantially different physical and auto-ignition properties. HVO has a lower viscosity and higher cetane number, and FAME has contrary characteristics. These parameters heavily affect mixture formation and the following combustion process, causing that the engine preoptimized to one fuel option can provide deteriorated performance and excess emissions if another sustainable option is applied. To investigate the scale of this problem, injection pressure sweeps were performed around the stock, low NOx and low PM engine calibration utilizing split fuel injection. The results showed that FAME and HVO prefer lower injection pressures than diesel fuel, with the benefits of simultaneous reduction of all emission indicators compared to DF. Additionally, reduction of injection pressure from 80 MPa to 60 MPa for biodiesels at low engine load resulted in improved brake thermal efficiency by 1 percentage point, due to reduced parasitic losses in the common rail system.
Źródło:
Combustion Engines; 2021, 60, 1; 72--78
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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