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Wyświetlanie 1-4 z 4
Tytuł:
Uwarunkowania rozwoju i wybrane właściwości gleb dolinki erozyjno - denudacyjnej Wieprzy w okolicach Mazowa
Controls on the development of soils in a erosional-denudational valley of Wieprza near Mazów and selected soil properties
Autorzy:
Jonczak, J.
Kuczyńska, P.
Powiązania:
https://bibliotekanauki.pl/articles/294990.pdf
Data publikacji:
2008
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
gleby
gleby brunatne kwaśne
gleby deluwialne
erozja
denudacja
dolinka erozyjno-denudacyjna
Wieprza
soils
acid brown soils (cambisols)
deluvial brown soils
erosion
denudation
erosional-denudational valleys
Wieprza Rive
Opis:
Celem badań była analiza przestrzennego zróżnicowania procesów i czynników glebotwórczych oraz właściwości pokrywy glebowej głęboko wciętej dolinki erozyjno-denudacyjnej Wieprzy w okolicach Mazowa (Równina Sławieńska, Polska północna). Badania wykazały, że mimo niewielkich rozmiarów dolinki erozyjno-denudacyjnej, w jej obrębie występuje duża różnorodność czynników i procesów glebotwórczych. Gleby dolinki zaklasyfikowano do czterech typów (brunatne kwaśne, deluwialne brunatne, deluwialne próchniczne, torfiasto-glejowe). Wykazują one dużą zmienność przestrzenną zarówno pod względem pozycji systematycznej, jak i morfologii oraz właściwości fizycznych i chemicznych.Wobrębie dolinki wyraźnie zaznaczają się trzy strefy – część wysoczyznowa, stoki i dno. Z każdą z tych stref związany jest inny kompleks czynników i procesów glebotwórczych.Wrozwoju gleb, w skali całej dolinki, podstawową rolę odgrywa rzeźba terenu, a procesy glebotwórcze pozostają w ścisłym związku z jej morfogenezą.
The aim of research was an analysis of spatial differentiation of soil-forming processes and factors, as well as of soil properties, in a deeply incised erosional-denudational valley of Wieprza near Mazów, northern Poland. Despite small size of the valley, there exists considerable variability of soil-forming factors and processes within its limits, hence soil systematic position, morphology, and physico-chemical properties vary across the valley. Soils in the valley belong to four types: acid brown soils (cambisols), deluvial brown soils, humic deluvial soils and peaty-gley soils. Three main landscape elements can be distinguished within the study area: upper surfaces, valley sides, and valley floor. Each zone is typified by its own complex of soil-forming factors. In the upper slope/plateau area soil properties reflect the characteristics of parent rock. Loamy deposits of former ice-dammed lakes support acid brown soils of low pH, high content of organic matter in the humic horizon, and completely depleted in carbonates. Slopes below are subject to erosion, hence the thickness of humic horizon and organic matter content are reduced in respect to soils present on the plateau. In slope concavities one can observe deposition of material brought down by slope wash and the build-up of deluvial soils. These soils show the development of cambic horizon, which typically contains large quantities of organic matter. In the valley floor mud deposition and the development of humic deluvial soils takes place. The latter are enriched in organic matter, nutrients, favourable C/N and C/P ratio, and have higher pH if compared with soils on the slopes and on the plateau. Their evolution remains under significant influence of water seeping from the truncated water-bearing horizons and, seasonally, water issued from drains. The surplus of water is conducive for peaty-gleyey soil development. At the entire valley scale, local relief is a key factor influencing soil evolution, whereas soil-forming processes remain in close correspondence with morphogenesis of the valley.
Źródło:
Landform Analysis; 2008, 7; 69-79
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Immunohistochemical Fascin-1 expression correlate with lymph node and distant metastases in pancreatic ductal adenocarcinoma
Autorzy:
Pryczynicz, A.
Nizioł, M.
Miniewska, K.
Kamińska, D.
Kuczyńska, P.
Zińczuk, J.
Zaręba, K.
Guzińska-Ustymowicz, K.
Powiązania:
https://bibliotekanauki.pl/articles/1918748.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Fascin-1
metastases
pancreatic ductal adenocarcinoma
Opis:
Introduction: Pancreatic cancer is characterized by its aggressiveness and poor prognosis. Furthermore, mortality is one of the highest among all types of cancers. It has been observed that the expression of Fascin-1 (the actin-bundling protein which enables the motility of cells) is higher in cancer cells and is correlated with invasiveness and metastasis. Purpose: To investigate the expression of Fascin-1 in histopathological specimens from patients treated for pancreatic cancer and its relationship with histopathological parameters. Materials and methods: The study was performed on a group of 52 patients diagnosed with pancreatic cancer in the Medical University of Bialystok Clinical Hospital. The expression of Fascin-1 was evaluated in tissue samples using the immunohistochemical method and was rated as “present” or “absent”. The analysis of histopathological parameters was performed in correlation with Fascin-1 expression. Results: Fascin-1 expression was observed in the cytoplasm of cancer cells in 42/52 cases (80.8%). Fascin-1 expression occurred more frequently among patients with lymph node metastases (92.6%) than without this type of metastases (68%) (p=0.024). Likewise, the expression of the investigated protein was observed more often with the presence of distant metastases (100%) than without those metastases (74.4%) (p=0.043). There were no statistically significant differences about age, sex, histological type of cancer, grade of histological differentiation, desmoplasia, inflammatory infiltration, foci of hemorrhage, necrosis, and MVD. Conclusion: The expression of Fasicn-1 is correlated with the presence of metastases and can be a useful marker of pancreatic cancer involvement.
Źródło:
Progress in Health Sciences; 2018, 8(2); 124-130
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
    Wyświetlanie 1-4 z 4

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