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Wyszukujesz frazę "Kedra, M." wg kryterium: Wszystkie pola

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Tytuł:
Okiem ryby - nowe spojrzenie na rozwój sieci neuronalnych i choroby neurorozwojowe
Autorzy:
Kedra, M.
Jaworski, J.
Zmorzynska, J.
Powiązania:
https://bibliotekanauki.pl/articles/848821.pdf
Data publikacji:
2016
Wydawca:
Polskie Towarzystwo Przyrodników im. Kopernika
Tematy:
neurony
sieci neuronowe
choroby neurorozwojowe
badania modelowe
organizmy modelowe
danio pregowany
Danio rerio
oko
siatkowka [anat.]
Źródło:
Wszechświat; 2016, 117, 10-12
0043-9592
Pojawia się w:
Wszechświat
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:
Urban vs. rural patients. Differences in stage and overall survival among patients treated surgically for lung cancer
Autorzy:
Rybojad, P.
Dluski, D.
Rybojad, B.
Kedra, M.
Sawicki, M.
Skoczylas, P.
Tabarkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/49882.pdf
Data publikacji:
2013
Wydawca:
Instytut Medycyny Wsi
Opis:
Introduction. Besides the undoubted influence of risk factors on morbidity and survival time, there are also other environmental factors, such as awareness of the prevalence of risk factors and the availability of modern diagnosis and treatment methods. Objective. To evaluate differences in lung cancer 5-year overall survival rates between urban and rural patients hospitalized in the Department of Thoracic Surgery of the Medical University in Lublin, Poland, and possible influence of several risk factors on these rates. Materials and methods. The analysis was based on 125 lung cancer patients who underwent surgical procedures in years 2006-2007 and who agreed to take part in the survey. The study aimed at recognition of the health situation and selected demographic traits of people who had been treated surgically for lung cancer. The differences were evaluated between rural and urban inhabitants in gender, age, lung function, smoking habits, exposure to risk factors at work, family history of cancer, staging of the disease, histological type of cancer, post-surgical treatment, and their possible influence on overall survival. Results. The results showed that the only noted differences between urban and rural population were in tobacco smoking and lung function. Survival rates were very similar and did not differ from the European average. Conclusions. The assumption that Polish rural patients are presenting with later cancer stages at the time of diagnosis, and have worse chances for survival, has become invalid in modern times.
Źródło:
Annals of Agricultural and Environmental Medicine; 2013, 20, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The malacostracan fauna of two Arctic fjords (West Spitsbergen): the diversity and distribution patterns of its pelagic and benthic components
Autorzy:
Legezynska, J.
Wlodarska-Kowalczuk, M.
Gluchowska, M.
Ormanczyk, M.
Kedra, M.
Weslawski, J.M.
Powiązania:
https://bibliotekanauki.pl/articles/48015.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
Malacostraca
plankton
glacial fjord
Spitsbergen
Kongsfjorden
Hornsund Region
Atlantic water
diversity
distribution
Opis:
This study examines the performance of pelagic and benthic Malacostraca in two glacial fjords of west Spitsbergen: Kongsfjorden, strongly influenced by warm Atlantic waters, and Hornsund which, because of the strong impact of the cold Sørkapp Current, has more of an Arctic character. The material was collected during 12 summer expeditions organized from 1997 to 2013. In all, 24 pelagic and 116 benthic taxa were recorded, most of them widely distributed Arctic-boreal species. The advection of different water masses from the shelf had a direct impact on the structure of the pelagic Malacostraca communities, resulting in the clear dominance of the sub-arctic hyperiid amphipod Themisto abyssorum in Kongsfjorden and the great abundance of Decapoda larvae in Hornsund. The taxonomic, functional and size compositions of the benthic malacostracan assemblages varied between the two fjords, and also between the glacier-proximate inner bays and the main fjord basins, as a result of the varying dominance patterns of the same assemblage of species. There was a significant drop in species richness in the strongly disturbed glacial bays of both fjords, but only in Hornsund was this accompanied by a significant decrease in density and diversity, probably due to greater isolation and poorer quality of sediment organic matter in its innermost basin. Our results suggest that the diversity and distribution of benthic malacostracans in these two fjords are only distantly related to the different hydrological regimes; rather, they are governed by locally acting factors, such as depth, sediment type, the variety of microhabitats and the availability and quality of food.
Źródło:
Oceanologia; 2017, 59, 4
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A huge biocatalytic filter in the centre of Barents Sea shelf?
Autorzy:
Weslawski, J.M.
Kedra, M.
Przytarska, J.
Kotwicki, L.
Ellingsen, I.
Skardhamar, J.
Renaud, P.
Goszczko, I.
Powiązania:
https://bibliotekanauki.pl/articles/48450.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:
permeability sediment
primary production
Barents Sea
organic carbon
barnacle
Balanus balanus
mollusc
Mya truncata
Hiatella arctica
Opis:
A primary production model for the Barents Sea shows a hot spot of organic carbon settlement to the sea bed over 100 km long, a shallow pile of highly permeable sediments (mainly large Balanus, Mya and Pecten shell fragments over 1 cm in size) of glacial origin. Hydrodynamic flow models suggest an intensive, deep flow of near-bottom waters into the sediment. Depending on wave height, water in shallow (30 m depth) places may percolate more than 5 m into the sediment. During 10 days of stormy weather as much as 4 to 8 kg wet weight pelagic biomass can be processed per square metre through this extremely permeable sediment. Analogous processes known in coastal waters lead to intense biocatalytic phenomena and metabolism of organic carbon within the seabed, estimated here as more intense than surface consumption. Spitsbergenbanken may be acting as a huge sink for organic carbon and an important source of nutrients in one of the most productive areas of the North Atlantic.
Źródło:
Oceanologia; 2012, 54, 2
0078-3234
Pojawia się w:
Oceanologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spigelian hernia: a case report
Autorzy:
Martyniuk, M.
Ustymowicz, W.
Zińczuk, J.
Pryczynicz, A.
Guzińska-Ustymowicz, K.
Kędra, B.
Zaręba, K.
Powiązania:
https://bibliotekanauki.pl/articles/1918888.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
Hernia
Spigelian hernia
incarcerated
Opis:
Spigelian hernias constitute a minute fraction of all abdominal hernias. In this monography, we present a case report of this relatively seldom seen phenomenon which some general surgeons never get to see during their medical career.
Źródło:
Progress in Health Sciences; 2019, 2; 53-56
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of Mechanical Behaviour of High-Frequency Piezoelectric Actuators Using Bouc-Wen Model
Autorzy:
Kędra, R.
Rucka, M.
Powiązania:
https://bibliotekanauki.pl/articles/221301.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
piezoelectric actuators
Bouc-Wen model
parameters identification
Opis:
The paper presents application of a modified, symmetrical Bouc-Wen model to simulate the mechanical behaviour of high-frequency piezoelectric actuators (PAs). In order to identify parameters of the model, a two-step algorithm was developed. In its first stage, the mechanical parameters were identified by taking into account their bilinear variability and using a square input voltage waveform. In the second step, the hysteresis parameters were determined based on a periodic excitation. Additionally, in order to reduce the influence of measurement errors in determination of selected derivatives the continuum wavelet transform (CWT) and translation-rotation transformation (TRT) methods were applied. The results proved that the modified symmetrical Bouc-Wen model is able to describe the mechanical behaviour of PAs across a wide frequency range.
Źródło:
Metrology and Measurement Systems; 2017, 24, 2; 413-424
0860-8229
Pojawia się w:
Metrology and Measurement Systems
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:
Preload monitoring in a bolted joint using Lamb wave energy
Autorzy:
Kędra, R.
Rucka, M.
Powiązania:
https://bibliotekanauki.pl/articles/201172.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Lamb waves
steel structures
bolted joints
non-destructive testing
structural health monitoring
Opis:
The knowledge of the load in prestressed bolted connections is essential for the proper operation and safety of engineering structures. Recently, bolted joints have become an area of intensive research associated with non-destructive diagnostics, in particular in the context of wave propagation techniques. In this paper, a novel procedure of bolt load estimation based on the energy of Lamb wave signals was proposed. Experimental tests were performed on a single lap joint of two steel plates. Ultrasonic waves were excited and registered by means of piezo-electric transducers, while precise measurement of the bolt load was obtained by means of using the force washer transducer. Experimental tests were supported by the finite element method analysis based on Schoenberg’s concept. The results showed that the relationship between the bolt load and signal energy was strongly nonlinear and it depended on the location of acquisition points.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 6; 1161-1169
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preliminary studies of fungi in the Biebrza National Park (NE Poland). II. Macromycetes
Wstępne badania grzybów w Biebrzańskim Parku Narodowym. II. Grzyby wielkoowocnikowe
Autorzy:
Kujawa, A.
Wrzosek, M.
Domian, G.
Kedra, K.
Szkodzik, J.
Rudawska, M.
Leski, T.
Karlinski, L.
Pietras, M.
Gierczyk, B.
Dynowska, M.
Slusarczyk, D.
Kalucka, I.
Lawrynowicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/67101.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Opis:
This paper presents the second part of the results of the first short-term inventory of fungi species occurring in the Biebrza National Park and is focused on a survey of macrofungi. The total number of macrofungi found during the survey in late August 2012 was 289 taxa: 17 ascomycetes and 272 basidiomycetes, inhabiting diverse ecological niches. The identified fungi belonged to ectomycorrhizal symbionts and saprobionts decomposing wood, plant litter and animal remnants. The identity of 25 mycorrhizal fungi species has been confirmed using molecular techniques. Five species are newly reported for Poland (Amanita olivaceogrisea, Lepiota lepida, Stropharia alcis, Xerocomus fennicus, X. cisalpinus) and 225 taxa (79 %) were not known in the Biebrza National Park. Fifty nine species are endangered in Poland, of which nine species are protected by law. Data on species richness and the taxonomic diversity of the identified fungi are briefly commented in terms of their significance for nature conservation and future research.
Prezentowane dane są wynikiem badań prowadzonych w dniach od 28 sierpnia do 1 września 2012 w ramach sesji terenowej Polskiego Towarzystwa Mykologicznego. Celem była wstępna inwentaryzacja grzybów wielkoowocnikowych występujących na terenie Biebrzańskiego Parku Narodowego (BbPN), terenu niemal zupełnie nie poznanego pod względem mykobioty. W artykule zamieszczono wykaz zidentyfikowanych 289 taksonów (gatunków, odmian i form) grzybów workowych i podstawkowych. Wśród znalezionych gatunków są grzyby bardzo rzadkie, znane z zaledwie jednego lub kilku stanowisk w Polsce (16 gatunków), a także wykazane w literaturze z Polski po raz pierwszy (5) oraz zagrożone i objęte ochroną (59), w tym Phellodon confluens – uznawany za wymarły. Jak wskazano w części pierwszej artykułu (Ruszkiewicz-Michalska et al. 2012), badania przeprowadzone w BbPN są pierwszymi z planowanego przez Polskie Towarzystwo Mykologiczne cyklu inwentaryzacji w obiektach objętych różnymi formami ochrony. W wielu takich obiektach (parkach narodowych, rezerwatach, parkach krajobrazowych oraz obszarach Natura 2000) brak jest danych mykologicznych lub są fragmentaryczne albo wymagające aktualizacji. Podstawową przesłanką do prowadzenia badań inwentaryzacyjnych jest potrzeba uwzględniania grzybów w polityce ochrony przyrody, zarówno na obszarze parków narodowych, jak i w szerszej skali.
Źródło:
Acta Mycologica; 2012, 47, 2
0001-625X
2353-074X
Pojawia się w:
Acta Mycologica
Dostawca treści:
Biblioteka Nauki
Artykuł
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