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    Wyświetlanie 1-8 z 8
    Tytuł:
    Antimicrobial resistance of thermophilic Campylobacter spp. isolated from cattle in Poland
    Autorzy:
    Bednarski, M
    Wieliczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/32555.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Polska
    cattle
    Campylobacter
    isolation
    antimicrobial resistance
    antibiotic resistance
    food-borne disease
    human gastroenteritis
    Campylobacter jejuni
    Opis:
    Campylobacter species are among the most frequently identified bacterial causes of human gastroenteritis. Because Campylobacter spp. harbored by cattle can be transmitted to humans, in this study we investigated antimicrobial resistance of thermophilic Campylobacter isolated from cows. Our study included 150 strains of Campylobacter (143 strains of C. jejuni and 7 strains of C. coli) isolated from cows in South-Western Poland. The minimal inhibitory concentration (MIC) to ciprofloxacin, erythromycin, gentamicin and tetracycline were determined using the agar dilution methodology. All strains of C. coli were susceptible to all four drugs studied. The most frequently detected resistance of C. jejuni was to ciprofloxacin (26 strains 18.2%). Resistance to tetracycline was observed in 5 strains (3.5%). All strains of C. jejuni were susceptible to erythromycin and gentamicin.
    Źródło:
    Polish Journal of Veterinary Sciences; 2010, 13, 1; 189-191
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Genetic comparison of Campylobacter jejuni isolated from different cattle farms
    Autorzy:
    Bednarski, M.
    Wieliczko, A.
    Mazurkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31410.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    genetic comparison
    Campylobacter jejuni
    isolation
    cattle
    animal farm
    genotyping
    ERIC-PCR method
    Opis:
    To compare the genotypes of Campylobacter jejuni, isolates of cattle origin were collected from 9 Polish farms and genotyped by ERIC-PCR. We identified 28 genotypes among the 43 C. jejuni isolates, and demonstrated high genomic diversity. The highest level of diversity was observed in strains isolated from stanchion-barn animals in opposition to those from the loose-housing system.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 2
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acid-base disorders in calves with chronic diarrhea
    Autorzy:
    Bednarski, M.
    Kupczynski, R.
    Sobiech, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2087971.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The aim of this study was to analyze disorders of acid-base balance in calves with chronic diarrhea caused by mixed, viral, bacterial and Cryptosporydium parvum infection. We compared results obtained with the classic model (Henderson-Hasselbalch) and strong ion approach (the Steward model). The study included 36 calves aged between 14 and 21 days. The calves were allocated to three groups: I - (control) non-diarrheic calves, group II - animals with compensated acid-base imbalance and group III calves with compensated acid-base disorders and hypoalbuminemia. Plasma concentrations of Na+, K+, Cl-, Cl2+, Mg2+, P, albumin and lactate were measured. In the classic model, acid-base balance was determined on the basis of blood pH, pCO2, HCO3-, BE and anion gap. In the strong ion model, strong ion difference (SID), effective strong anion difference, total plasma concentration of nonvolatile buffers (ATot) and strong ion gap (SIG) were measured. The control calves and the animals from groups II and III did not differ significantly in terms of their blood pH. The plasma concentration of HCO3-, BE and partial pressure of CO2 in animals from the two groups with chronic diarrhea were significantly higher than those found in the controls. The highest BE (6.03 mmol/l) was documented in calves from group II. The animals from this group presented compensation resulted from activation of metabolic mechanisms. The calves with hypoal-buminemia (group III) showed lower plasma concentrations of albumin (15.37 g/L), Cl- (74.94 mmol/L), Mg2+ (0.53 mmol/L), P (1.41 mmol/L) and higher value of anion gap (39.03 mmol/L). This group III presented significantly higher SID3 (71.89 mmol/L), SID7 (72.92 mmol/L) and SIG (43.53 mmol/L) values than animals from the remaining groups (P<0.01), whereas ATot (6.82 mmol/L) were significantly lower. The main finding of the correlation study was the excellent relationship between the AGcorr and SID3, SID7, SIG. In conclusion, chronic diarrhea leads to numerous water-electrolyte disorders. Characterization of acid-base disturbance in these cases suggests that classic model have some limitations. This model can not be recommended for use whenever serum albumin or phosphate concentrations are markedly abnormal.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Winter blood values of selected parameters in a group of non - hibernating captive brown bears (Ursus arctos)
    Autorzy:
    Sergiel, A.
    Bednarski, M.
    Maslak, R.
    Pasecki, T.
    Huber, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/31191.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Bears undergo some significant changes reflected in blood values during winter season. The most significant are reduced urea and increased creatinine, by some authors considered to be physiological indicators of hibernation. Studied group of six captive brown bears (Ursus arctos) showed decreased activity in winter but were accepting food and walked outdoors. Blood parameters assessed in February 2011 revealed mean values of leucocytes and neutrophils as significantly lower, and creatinine significantly increased compared to captive and free living bears sampled during other seasons when bears are active.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Invasiveness of Listeria monocytogenes strains isolated from animals in Poland
    Autorzy:
    Walecka-Zacharska, E.
    Kosek-Paszkowska, K.
    Bania, J.
    Staroniewicz, Z.
    Bednarski, M.
    Wieliczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/30672.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    Animals are important reservoir of Listeria monocytogenes, a pathogen causing serious infections in both humans and livestock. However, data on invasiveness of L. monocytogenes strains of animal origin is very scarce. Ability of 18 L. monocytogenes strains of animal origin to invade HT- 9 cells was investigated. Plaque forming assay was used to assess invasiveness and ability of the pathogen to spread in the cell line. Almost 40% of L. monocytogenes strains were weakly invasive. It was shown that strains from serogroup 4b exhibited the highest invasiveness, whereas serogroup 1/2b consisted of strains of invasiveness below 0.0001%. Analysis of translated inlA and inlB gene sequences revealed no premature stop codons. Lineage-specific mutations in low invasive strains were identified within inlA and inlB sequences. Our results demonstrate high incidence of low invasive animal L. Monocytogenes strains, which may be at least partly explained by unique point mutations in the InlA and InlB.
    Źródło:
    Polish Journal of Veterinary Sciences; 2015, 18, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of administration of biotin and zinc chelate (Zn-methionine) to cows in the first and second trimester of lactation on their health and productivity
    Autorzy:
    Kinal, S.
    Twardon, J.
    Bednarski, M.
    Pres, J.
    Bodarski, R.
    Slupczynska, M.
    Ochota, M.
    Dejneka, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/32375.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    animal health
    animal productivity
    biotin administration
    cow
    first lactation trimester
    lactation
    methionine
    second lactation trimester
    zinc chelate
    dairy cow
    blood serum
    mineral level
    acid-base balance
    milk productivity
    milk composition
    progesterone
    haptoglobin level
    Opis:
    In cattle, the prevention of diseases might be possible using dietary methods, with nutritional optimization of feed rations. For years significant influence has been associated with the addition of biotin, methionine and zinc (each given individually, or as chelate – Zn-methionine). The aim of this study was to evaluate the influence of biotin or biotin + Zn-methionine additives on the health and performance of cows, in the first and second trimester of lactation. This study was carried out in 3 groups of cows, 30 animals in each group. In the first group cows were fed the usual fodder used on the farm. In the second group biotin at 10 mg/day/cow was added. In the third group both biotin at 10 mg/day/cow and Zn-methionine at 5 g/day/cow were added. The administration of biotin increased the milk yield and reduced the occurrence of retained placenta, as well as endometritis puerperalis. However, the high doses of biotin suppressed ovulation and oestrus symptoms in the investigated cows (low progesterone levels on days 15, 21 and 45 after calving). Zn-methionine in comparison to biotin had a lower effect on the milk yield in the cows. Moreover, its supplementation improved the milk content, as well as some of the blood parameters; it also decreased the number of somatic cells in milk. The concurrent administration of biotin and zinc-methionine seemed to be a good method for the prophylaxis of subacute mastitis and for the improvement of the high yielding dairy cows’ productivity.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 1
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Feed material influence on the dynamics of the suspended screen at its steady state operation and transient states
    Wpływ nadawy na dynamikę przesiewacza podwieszonego w stanie pracy ustalonej i okresach przejściowych
    Autorzy:
    Michalczyk, J.
    Bednarski, Ł.
    Gajowy, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/219991.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    przesiewacze wibracyjne
    układy o ograniczonym wzbudzeniu
    nadawa sypka
    rezonans przejściowy
    vibrating screens
    limited power systems
    loose feed material
    transient resonance
    Opis:
    The influence of the feed material on steady vibrations as well as on the transient resonance during the start-up and coasting of the suspended screen, was analysed in the hereby paper. The influence of the feed material presence on the possibility of performing the first half-turn of the vibrator was also established. The original, feed material simulation model reflecting its layer properties and diversification of feed particles vibrations along the screen riddle – specially developed for this aim – was applied in investigations.
    W pracy poddano analizie wpływ nadawy na przebieg drgań ustalonych i rezonansu przejściowego podczas rozruchu i wybiegu przesiewacza podwieszonego. Ustalono też wpływ jaki obecność nadawy wywiera na możliwość wykonanie pierwszego półobrotu wibratora. Do badań zastosowano oryginalny, opracowany w tym celu model symulacyjny nadawy, odzwierciedlający jej własności warstwowe i zróżnicowanie drgań cząstek nadawy wzdłuż rzeszota przesiewacza.
    Źródło:
    Archives of Mining Sciences; 2017, 62, 1; 145-161
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monitoring of secondary forest succession on abandoned farmland using LiDAR point clouds
    Autorzy:
    Szostak, M.
    Bednarski, A.
    Wężyk, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/145380.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mapowanie
    lotnicze skanowanie laserowe
    dane katastralne
    ALS
    nDSM
    LULC changes
    Opis:
    The purpose of the study was an assessment of LiDAR point clouds for automating the mapping of land use and land cover changes, mainly land abandonment and the process of secondary forest succession. Detailed information about land cover was determined based on airborne laser scanning data. The presented study focuses on the analysis of the spatial range and structure of vegetation. The study area was located in Milicz district in the voivodeship of Lower Silesia – the central west part of Poland. The areas of interest were parcels where agricultural land had been abandoned and forest succession processes had progressed. Analysis of the spatial range of the secondary forest succession was carried out using a reclassified nDSM. Reclassification of the nDSM was done using > 1 m, > 2 m and > 3 m for the pixel values, representing the height of vegetation above the ground. Parameters such as height of vegetation, standard deviation of height and cover density were calculated, to show the process of the increase in forest succession on abandoned agricultural land. The results confirmed a discrepancy between the cadastral data and the actual use of the plots. In the study area, more than three times as much forested and wooded area was detected than had been recorded in official databases. Analyses based on airborne laser scanning point clouds indicated significant diversity in the vertical and horizontal structure of vegetation. The results demonstrated gradual succession of greenery in the research area.
    Źródło:
    Geodesy and Cartography; 2018, 67, 2; 305-319
    2080-6736
    2300-2581
    Pojawia się w:
    Geodesy and Cartography
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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