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    Wyświetlanie 1-8 z 8
    Tytuł:
    Opornosc stawonogow hematofagicznych - narastajacy problem. 1.Mechanizmy opornosci na insektycydy
    Autorzy:
    Kedra, E
    Powiązania:
    https://bibliotekanauki.pl/articles/838355.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    mechanizmy opornosciowe
    opornosc na insektycydy
    stawonogi
    hematofagi
    Opis:
    Resistance in the hematophagous arthropods - problem on the rise. I. Resistance mechanisms to insecticides. Hematophagous arthropods are pesky but can also be very dangerous to human health due to their ability to act as vectors to many viral, bacterial or parasite-related diseases. The common application of chemicals to control pests leaded to the increasing resistance to pesticides among both insects and ticks. The causes underlying the appearance of the resistance and the mechanisms involved are presented in this article. The description of mechanisms is presented starting from decreased penetration of the pesticide, to an increase in metabolism of pesticide, to the reduced sensitivity of the pesticide's target.
    Źródło:
    Annals of Parasitology; 2003, 49, 4; 351-356
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Odporność stawonogów hematofagicznych - narastający problem. 2. Konsekwencje odporności oraz strategie zapobiegające rozszerzaniu się tego zjawiska
    Autorzy:
    Kedra, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2146421.pdf
    Data publikacji:
    2004
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    odpornosc na pestycydy
    monitoring odpornosci
    stawonogi
    hematofagi
    Opis:
    Resistance in the hematophagous arthropods - problem on the rise. II: The consequences of resistance and management strategies to avoid resistance development. Insecticide resistance has been a problem in all insects groups. Resistance has developed to every chemical class of insecticide, including microbial drugs and insect growth regulators. The result of rising resistance could be either increase in the number of arthropods cumbersome, like lice, or spread of arthropod-borne diseases, like malaria. The main tool of prevention against resistance is surveillance of the susceptibility of populations. Careful scrutiny of current information about vector resistance shows that the full effect of resistance on control efforts is not known. Resistance management strategies are dependent on early detection of the occurrence of resistance and efficient monitoring of resistance gene frequencies in populations. Detection of the susceptibility of a population could be shown trough bioassay, biochemical assay, or molecular assay. Resistance management can help avoid resistance development in populations or slow the rate of resistance development.
    Źródło:
    Wiadomości Parazytologiczne; 2004, 50, 1; 13-17
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oporność stawonogów hematofagicznych - narastający problem. 1.Mechanizmy oporności na insektycydy
    Autorzy:
    Kędra, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2147664.pdf
    Data publikacji:
    2003
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    mechanizmy opornosciowe
    opornosc na insektycydy
    stawonogi
    hematofagi
    Opis:
    Resistance in the hematophagous arthropods - problem on the rise. I. Resistance mechanisms to insecticides. Hematophagous arthropods are pesky but can also be very dangerous to human health due to their ability to act as vectors to many viral, bacterial or parasite-related diseases. The common application of chemicals to control pests leaded to the increasing resistance to pesticides among both insects and ticks. The causes underlying the appearance of the resistance and the mechanisms involved are presented in this article. The description of mechanisms is presented starting from decreased penetration of the pesticide, to an increase in metabolism of pesticide, to the reduced sensitivity of the pesticide's target.
    Źródło:
    Wiadomości Parazytologiczne; 2003, 49, 4; 351-356
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Epibenthic diversity and productivity on a heavily trawled Barents Sea bank (Tromsoflaket)
    Autorzy:
    Kedra, M.
    Renaud, P.E.
    Andrade, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/49128.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    epibenthic diversity
    Barents Sea
    ecosystem
    benthic community
    secondary production
    epifaunal organism
    sponge
    trawled area
    Opis:
    Shallow Arctic banks have been observed to harbour rich communities of epifaunal organisms, but have not been well-studied with respect to composition or function due to sampling challenges. In order to determine how these banks function in the Barents Sea ecosystem, we used a combination of video and trawl/dredge sampling at several locations on a heavily trawled bank, Tromsøflaket — located at the southwestern entrance to the Barents Sea. We describe components of the benthic community, and calculate secondary production of dominant epifaunal organisms. Forty-six epibenthic taxa were identified, and sponges were a significant part of the surveyed benthic communities. There were differences in diversity and production among areas, mainly related to the intensity of trawling activities. Gamma was the most diverse and productive area, with highest species abundance and biomass. Trawled areas had considerably lower species numbers, and significant differences in epifaunal abundance and biomass were found between all trawled and untrawled areas. Trawling seems to have an impact on the sponge communities: mean individual poriferan biomass was higher in untrawled areas, and, although poriferans were observed in areas subjected to more intensive trawling, they were at least five times less frequent than in untrawled areas.
    Źródło:
    Oceanologia; 2017, 59, 2
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ba0.5Sr0.5Co0.8Fe0.2O3-σ and La0.6Sr0.4Co0.8Fe0.2O3-σ composite cathode for solid oxide fuel cell
    Autorzy:
    Mosiałek, M.
    Kędra, A.
    Krzan, M.
    Bielańska, E.
    Tatko, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355878.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    barium strontium cobalt ferrite
    lanthanum strontium cobalt ferrite
    solid oxide fuel cell
    oxygen reduction reaction
    electrochemical impedance spectroscopy
    Opis:
    Composite cathodes contain Ba0.5Sr0.5Co0.8Fe0.2O3-σ and La0.6Sr0.4Co0.8Fe0.2O3-σ were tested in different configuration for achieving cathode of area specific resistance lower than Ba0.5Sr0.5Co0.8Fe0.2O3-σ and La0.6Sr0.4Co0.8Fe0.2O3-σ cathodes. Electrodes were screen printed on samaria-doped ceria electrolyte half-discs and tested in the three electrode setup by the electrochemical impedance spectroscopy. Microstructure was observed by scanning electron microscopy. The lowest area specific resistance 0.46 and 2.77 Ω cm-2 at 700 °C and 600 °C respectively revealed composite cathode contain Ba0.5Sr0.5Co0.8Fe0.2O3-σ and La0.6Sr0.4Co0.8Fe0.2O3-σ in 1:1 weight ratio. The area specific resistance of this cathode is characterized by the lowest activation energy among tested cathodes.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 3; 1483-1488
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cancer of the gallbladder – own experience
    Autorzy:
    Gryko, M.
    Dawidziuk, T.
    Sawicka, E.
    Cepowicz, D.
    Kamocki, Zb.
    Masiulaniec, P.
    Kędra, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1916507.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    gallbladder cancer
    survival
    surgery
    gallstones
    cholecystectomy
    Opis:
    Gallbladder cancer is a relatively rare cancer of the gastrointestinal tract, most commonly detected (approximately 95% of cases) in the most advanced clinical stage IV and burdened with high mortality rate. This is mainly due to the nonspecific symptoms in the early stages of the disease. The remaining cases of gallbladder cancer are usually detected after surgery due to gallstone disease. Gallstones, their size and pancreatic juice reflux into the gallbladder are risk factors in the development of gallbladder cancer. In this paper the authors carried out a retrospective research based on an evaluation of a group of 38 patients treated surgically due to the gallbladder cancer in the years 2005-2012 in the Second Department of General and Gastroenterological Surgery in Białystok Medical University Hospital. In this group there were 29 women and 9 men, in age between 48-86 years. Although women suffered from gallbladder cancer more often than men, their survival rate was significantly better after the surgery. The research showed some benefits of extended surgical procedures even in patients with advanced stages of the disease, while the effectiveness of surgical treatment depends mainly on the possibility of radical resection of the primary lesion and, eventually, the resection of lymph nodes and other infiltrated tissues.
    Źródło:
    Progress in Health Sciences; 2014, 4, 1; 153-157
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the presence of pancreatic intraepithelial neoplasia in various diseases of this organ
    Autorzy:
    Zińczuk, J.
    Zaręba, K.
    Konarzewska-Duchnowska, E.
    Guzińska-Ustymowicz, K.
    Kędra, B.
    Kemona, A.
    Pryczynicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1918553.pdf
    Data publikacji:
    2017-11-12
    Wydawca:
    Uniwersytet Medyczny w Białymstoku
    Tematy:
    pancreatic intraepithelial neoplasia
    PanIN
    pancreatic ductal adenocarcinoma
    pancreatic cancer
    chronic pancreatitis
    Opis:
    Purpose: Pancreatic intraepithelial neoplasia (PanIN) is one of the most commonly occurring precancerous lesion in pancreas which leads to development of pancreatic ductal adenocarcinoma (PDAC). We assessed the presence and grade of pancreatic intraepithelial neoplasia in the course of various diseases of the pancreas and its correlations with chosen clinicopathological parameters. null Results: A total of 276 foci of PanIN were identified in 94 patients. The most common lesions were PanIN 1a and PanIN 1b which together constituted 68.2 % of all lesions, whereas the PanIN 2 was present in 21.7% and PanIN 3 in 10.1% of patients. No statistical differences were observed in gender tendency for the development of PanINs. There was correlation between age of patients and degree of PanIN (p=0.034). There is no statistical difference in PanIN frequency among patients with pancreatic ductal adenocarcinomas, neuroendocrine tumors, chronic pancreatitis and pancreatic cysts (p=0.592). Conclusions: Our study showed that important factor in development of pancreatic intraepithelial neoplasia is age and the presence of PanIN in nonneoplastic diseases in older people should be included to the group with increased risk of cancer development.
    Źródło:
    Progress in Health Sciences; 2017, 7(2); 43-49
    2083-1617
    Pojawia się w:
    Progress in Health Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studying of Perovskite Nanoparticles in PMMA Matrix Used as Light Converter for Silicon Solar Cell
    Autorzy:
    Lipiński, M.
    Socha, R. P.
    Kędra, A.
    Gawlińska, K.
    Kulesza-Matlak, G.
    Major, Ł.
    Drabczyk, K.
    Łaba, K.
    Starowicz, Z.
    Gwóźdź, K.
    Góral, A.
    Popko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/356850.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    perovskite nanoparticles
    light converters
    solar cells
    solar energy materials
    Opis:
    The nanoparticles of CH3NH3PbBr3 hybrid perovskites were synthesized. These perovskite nanoparticles we embedded in polymethyl methacrylate (PMMA) in order to obtain the composite, which we used as light converter for silicon solar cells. It was shown that the composite emit the light with the intensity maximum at about 527 nm when exited by a short wavelength (300÷450 nm) of light. The silicon solar cells were used to examine the effect of down-conversion (DC) process by perovskite nanoparticles embedded in PMMA. For experiments, two groups of monocrystalline silicon solar cells were used. The first one included the solar cells without surface texturization and antireflection coating. The second one included the commercial cells with surface texturization and antireflection coating. In every series of the cells one part of the cells were covered by composite (CH3NH3PbBr3 in PMMA) layer and second part of cells by pure PMMA for comparison. It was shown that External Quantum Efficiency EQE of the photovoltaic cells covered by composite (CH3NH3PbBr3 in PMMA) layer was improved in both group of the cells but unfortunately the Internal Quantum Efficiency was reduced. This reduction was caused by high absorption of the short wavelength light and reabsorption of the luminescence light. Therefore, the CH3NH3PbBr3 perovskite nanoparticles embedded in PMMA matrix were unable to increase silicon solar cell efficiency in the tested systems.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1733-1739
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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