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    Wyświetlanie 1-4 z 4
    Tytuł:
    Experimental testing of methanol sorption on selected coal samples from Upper Silesian Basin
    Autorzy:
    Baran, P.
    Jodłowski, G. S.
    Krzyżanowski, A.
    Zaręba, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/184251.pdf
    Data publikacji:
    2014
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    coal
    sorption
    methanol
    multisorption model
    Opis:
    This paper summarises the results of methanol sorption on three selected coal samples from Polish collieries. These coals differ in terms of their degree of metamorphism (coal rank), petrography and elemental composition. It was found out that during the sorption of methanol, the sorption capacity is closely related to the structure of the coal surface and the amount of sorbed polar substance tends to decrease with the higher degree of metamorphism. Experimental data were plotted as isotherms. Empirical measurements were supported by thermodynamic analysis of aliphatic hydrocarbons sorption. The procedure is based on the Multisorption Model (MSM) designed for describing small molecules sorption in different types of carbonaceous materials (hard coals, lignites, active carbons).
    Źródło:
    Geology, Geophysics and Environment; 2014, 40, 3; 261-269
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Glucagonoma as a rare case of neuroendocrine tumor of the pancreas: a case report
    Autorzy:
    Zińczuk, J.
    Lewoniewska, S.
    Zaręba, K.
    Pryczynicz, A.
    Guzińska-Ustymowicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918859.pdf
    Data publikacji:
    2019-08-26
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Glucagonoma
    pancreas
    neuro-endocrine tumor
    diabetes
    Opis:
    Introduction: Glucagonoma is a rare neuroendocrine tumor with characteristic features such as the presence of the glucagon-producing tumor, diabetes, and necrolytic migratory erythema. Case presentation: the 60-year-old patient was admitted to hospital with periodic pain in the right and middle upper abdominal appearing after eating. Laboratory tests presented a high glucose level and anemia. Tumor of the body and tail of the pancreas passing the organ pouch has been found during the surgery. Diagnosis of glucagonoma was confirmed in histopathological examination in immunohistochemical stainings: a positive reaction was observed with chromogranin, synaptophysin and CEA. The proliferative activity of Ki-67 was less than 1%. Staining for glucagon also was positive so confirmed the presence of neuroendocrine tumor - glucagonoma. Conclusions: Glucagonoma sometimes may occur without characteristic features which may cause delayed diagnosis. Early diagnosis of glucagonoma is important because it increases the chances of successful recovery.
    Źródło:
    Progress in Health Sciences; 2019, 1; 169-173
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Expression of EpCAM protein in gastric cancer cells may contribute to its histogenesis
    Autorzy:
    Nizioł, M.
    Kuczyńska, P.
    Misiura, M.
    Zińczuk, J.
    Zaręba, K.
    Ustymowicz, W.
    Ćwiklińska-Dworakowska, M.
    Baszun, M.
    Jelski, S.
    Guzińska-Ustymowicz, K.
    Pryczynicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918619.pdf
    Data publikacji:
    2018-06-18
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Adhesion
    EpCAM
    gastric cancer
    Opis:
    Introduction: EpCAM protein belongs to adhesion molecules of epithelial cells. It mediates in the homophile adhesion cell-cell reactions. EpCAM protein expression can be observed in the majority of healthy normal cells. However, mutations in EpCAM gene may lead to an increased risk of cancer development. The aim of the study was to assess EpCAM protein expression in the correlation with chosen clinical and histological parameters in gastric cancer. Materials and Methods: EpCAM protein expression was evaluated immunohistochemically in 88 patients diagnosed with gastric cancer. Results: An increase in EpCAM protein expression was demonstrated in cancer cells compared to normal gastric mucosa (59.3% cancers with the positive expression of EpCAM protein). The increased EpCAM protein expression was observed in patients with a histological type of adenocarcinoma without a mucinous component than in those with adenocarcinoma with a mucinous component (p=0.028). The higher expression of this protein was observed also in the intestinal type according to the Lauren classification (p=0.037). The expression of the protein was lower in the diffuse type of cancer. Additionally, an increase in EpCAM protein expression was revealed in cancers infiltrating to the blood vessels (p=0.013). Conclusions: A correlation between EpCAM expression and adenocarcinoma without a mucinous component as well as the intestinal type according to the Lauren classification may prove a role of this protein in the histogenesis of gastric cancer. Moreover, its positive expression is related to cancerous cells infiltrating to the blood vessels, which may suggest a role of EpCAM protein in the early stages of gastric cancer metastases.
    Źródło:
    Progress in Health Sciences; 2018, 8(1); 74-79
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Significance of mucin expression in pancreatic intraepithelial neoplasia (PanIN) – precursor lesions of pancreatic ductal adenocarcinoma (PDAC)
    Autorzy:
    Zińczuk, J.
    Zaręba, K.
    Pryczynicz, A.
    Kuczyńska, P.
    Boroń, Z.
    Ustymowicz, W.
    Maciorkowska, M.
    Ćwiklińska-Dworakowska, M.
    Baszun, M.
    Jelski, S.
    Guzińska-Ustymowicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918638.pdf
    Data publikacji:
    2018-06-18
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    Mucin
    immunohistochemistry
    pancreatic intraepithelial neoplasia
    PanIN
    Opis:
    Purpose: To evaluate chosen mucins (mucin 1, 4, 5AC) expression in pancreatic intraepithelial neoplasia, which is a precursor lesion of pancreatic ductal adenocarcinoma. Materials and methods: The study group included 70 patients operated on due to inflammation, cysts and pancreatic ductal adenocarcinoma with pancreatic intraepithelial neoplasia revealed additionally. Mucin 1, 4 and 5AC expression was assessed by immunohistochemical method using polyclonal antibodies. Results: Statistical analysis proved a positive correlation between the expression of mucin 1, 4 and 5AC proteins and the presence and staging of pancreatic intraepithelial neoplasia (p<0.001). Statistically significant correlations were determined between mucin 1, 4 and 5AC and the location of PanIN lesion in the pancreas. Positive correlations were found between mucin 5AC expression and the type of a basic disease (p=0.014). Differences in the expression of MUC 1, 4 and 5AC proteins between healthy pancreatic ducts and various stages of pancreatic intraepithelial neoplasia were statistically significant (p<0.001). Conclusions: Overexpression of mucin 1, 4 and 5AC is related to the presence of pancreatic intraepithelial neoplasia. This suggests that overproduction of mucus is a phenomenon occurring early in the process of carcinogenesis in the pancreas and has its beginning in precancerous lesions of an early stage.
    Źródło:
    Progress in Health Sciences; 2018, 8(1); 63-73
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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