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    Wyświetlanie 1-15 z 15
    Tytuł:
    The impact of a surprise dividend increase on a stocks performance. the analysis of companies listed on the Warsaw Stock Exchange
    Autorzy:
    Słoński, T.
    Zawadzki, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/406506.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    effect of a dividend announcement
    event study analysis
    Opis:
    The reaction of marginal investors to the announcement of a surprise dividend increase has been measured. Although field research is performed on companies listed on the Warsaw Stock Exchange, the paper has important theoretical implications. Valuation theory gives many clues for the interpretation of changes in dividends. At the start of the literature review, the assumption of the irrelevance of dividends (to investment decisions) is described. This assumption is the basis for up-to-date valuation procedures leading to fundamental and fair market valuation of equity (shares). The paper is designed to verify whether the market value of stock is immune to the surprise announcement of a dividend increase. This study of the effect of a surprise dividend increase gives the chance to partially isolate such an event from dividend changes based on long-term expectations. The result of the research explicitly shows that a surprise dividend increase is on average welcomed by investors (an average abnormal return of 2.24% with an associated p-value of 0.001). Abnormal returns are realized by investors when there is a surprise increase in a dividend payout. The subsample of relatively high increases in a dividend payout enables investors to gain a 3.2% return on average. The results show that valuation models should be revised to take into account a possible impact of dividend changes on investors’ behavior.
    Źródło:
    Operations Research and Decisions; 2012, 22, 2; 45-54
    2081-8858
    2391-6060
    Pojawia się w:
    Operations Research and Decisions
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ różnych dawek i form siarki na zawartość magnezu w glebie i roślinach
    Influence of different doses and forms of sulphur on magnesium content in soil and plants
    Autorzy:
    Skwierawska, M.
    Zawadzki, B.
    Zawartka, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/15768.pdf
    Data publikacji:
    2006
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
    Tematy:
    magnez
    zawartosc magnezu
    gleby
    rosliny
    nawozenie siarka
    dawki nawozowe
    siarka siarczanowa
    siarka elementarna
    przyswajalnosc magnezu
    Opis:
    W 3-letnim doświadczeniu polowym badano wpływ nawożenia różnymi dawkami siarki siarczanowej i elementarnej na zawartość przyswajalnego magnezu w glebie, w dwóch poziomach: 0-40 i 40-80 cm. Dodatkowo badano wpływ nawożenia siarką na zawartość oraz pobranie magnezu przez rośliny: kapustę, cebulę i jęczmień jary, w dwóch fazach rozwoju. Nawożenie dawką 120 kg S·ha-1 spowodowało zmniejszenie zawartości przyswajalnego magnezu w glebie, w poziomie 0-40 i 40-80 cm, oraz magnezu ogółem w kapuście i jęczmieniu w fazie juwenilnej. Działanie siarki na zawartość i pobranie magnezu zależało od gatunku i fazy rozwojowej rośliny. Nawożenie siarką miało, na ogół, niewielki wpływ na zawartość magnezu w roślinach dojrzałych.
    In a three-year field experiment the influence of fertilization with different doses of sulphate and elementary sulphur on the content of available magnesium in soil layers at the depths of 0-40 and 40-80 cm was studied. Impact of fertilization with sulphur on the content and uptake of magnesium by plants (cabbage, onion and spring barley in two growth stages) was estimated in the studies. Fertilization with 120 kg S·ha-1 caused decrease in the content of available magnesium in soil at 0-40 and 40-80 cm depth. Decrease of total magnesium content was observed in cabbage and juvenile plants of spring barley. The influence of sulphur fertilization on the content and uptake of magnesium depended on the growth stage of crops. only slight influence of fertilization with sulphur on the content of magnesium in ripe crops was observed.
    Źródło:
    Journal of Elementology; 2006, 11, 4
    1644-2296
    Pojawia się w:
    Journal of Elementology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wplyw roznych dawek i form siarki na zawartosc i pobranie wapnia przez rosliny
    Autorzy:
    Skwierawska, M
    Zawadzki, B
    Zawartka, L
    Nogalska, A
    Powiązania:
    https://bibliotekanauki.pl/articles/798035.pdf
    Data publikacji:
    2006
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    zawartosc wapnia
    zawartosc witaminy C
    wapn
    jeczmien jary
    dawki nawozowe
    zawartosc cukrow
    pobieranie skladnikow pokarmowych
    nawozenie siarka
    nawozenie
    kapusta
    cebula
    calcium content
    vitamin C content
    calcium
    spring barley
    fertilizer dose
    sugar content
    nutrient intake
    sulphur fertilization
    fertilization
    cabbage
    onion
    Opis:
    W latach 2000-2002 przeprowadzono 3-letnie doświadczenie polowe, w Byszwaldzie, w pobliżu Lubawy. Eksperyment założono na glebie brunatnej, kwaśnej o składzie granulometrycznym piasku gliniastego mocnego. Celem badań było określenie wpływu wzrastających dawek siarki siarczanowej i elementarnej na zawartość wapnia i wielkość pobrania tego składnika przez kapustę, cebulę i jęczmień jary oraz na zawartość witaminy С i cukrów w kapuście i cebuli. Przez cały okres trwania doświadczenia dawki siarki siarczanowej (S-SO4) i elementarnej (S-S°) wynosiły: S, - 40, S2 - 80 i S3 - 120 kg·ha⁻¹. Roślinami testowanymi były kolejno: kapusta głowiasta, cebula zwyczajna i jęczmień jary. Rośliny badane były w dwóch fazach: juwenilnej i dojrzałości technologicznej. Wpływ siarki na zawartość wapnia w roślinach oraz jego wynos zależał od dawki i formy siarki oraz gatunku i fazy rozwojowej rośliny. Największy wzrost zawartości wapnia w cebuli dojrzalej konsumpcyjnie stwierdzono po zastosowaniu siarki elementarnej w największej dawce oraz siarki siarczanowej w najmniejszej ilości. Udział siarki w nawożeniu wpłynął na zwiększenie zawartości wapnia w ziarnie jęczmienia. Nawożenie siarką nie miało istotnego wpływu na zmiany zawartości wapnia w kapuście w obu fazach rozwoju oraz w jęczmieniu jarym w fazie kłoszenia. Zastosowanie siarki powodowało na ogół obniżenie zawartości witaminy С oraz cukrów prostych i ogółem w kapuście i cebuli w odniesieniu do obiektu z samym NPK
    Three years field experiment was carried out at Byszwałd near Lubawa (north-eastern Poland) in years 2000-2002. The experiment was established on brown acid soil of loam granulometic composition. The study determined the? effect of improved doses of sulphate and elementary sulphur on calcium content and uptake by cabbage, onion and spring barley. The content of vitamin С and; sugars in cabbage and onion were also observed. During whole time of experiment the following doses of sulphate (S-S04) and elementary sulphur (S-S°) were applied: S, - 40, S2 - 80 and S3 - 120 kg·ha⁻¹. Tested plants in sequence were: cabbage, onion and spring barley. The plants were examined in two phases: juvenile and technological maturity. The influence of sulphur on content calcium in plants as well as calcium uptake was dependent on doses, form of applied sulphur, species and phase of plant growth. Largest increase of calcium content in matured onion was stated after adding of maximum dose of elementary sulphur and minimum dose of sulphate sulphur. Sulphur fertilization increased the content of calcium in barley grain. The sulphur fertilization did not significantly the calcium content in cabbage at two development phases nor on earing phase of spring barley. Sulphur application as a rule decreased the contents of vitamin C, simple and total sugars in cabbage and onion in comparison to fertilization treatment with NPK only.
    Źródło:
    Zeszyty Problemowe Postępów Nauk Rolniczych; 2006, 512, 2; 545-554
    0084-5477
    Pojawia się w:
    Zeszyty Problemowe Postępów Nauk Rolniczych
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ filtracji oraz zmian nasycenia gruntu na stateczność wałów przeciwpowodziowych
    Impact of filtration and changes in soil saturation on slope stability of flood embankments
    Autorzy:
    Zawadzki, L.
    Bursa, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/887274.pdf
    Data publikacji:
    2018
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    waly przeciwpowodziowe
    statecznosc
    filtracja
    grunty spoiste
    grunty niespoiste
    wytrzymalosc na scinanie
    metoda elementow skonczonych
    Źródło:
    Scientific Review Engineering and Environmental Sciences; 2018, 27, 2[80]
    1732-9353
    Pojawia się w:
    Scientific Review Engineering and Environmental Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Balance disorders caused by running and jumping occurring in young basketball players
    Autorzy:
    Struzik, A.
    Zawadzki, J.
    Pietraszewski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/307038.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    równowaga
    skok
    sztywność
    biomechanika
    equilibrium
    vertical jump
    shuttle run
    stiffness
    Opis:
    Purpose: Body balance, as one of the coordination abilities,is a desirable variable for basketball players as regards the necessity of efficient responses in constantly changing situations on a basketball court. The aim of this study was to check whether physical activity in the form of running and jumping influences variables characterizing the process of keeping body balance of a basketball player in the standing position. Methods: The research was conducted on 11 young basketball players. The measurements were taken with a Kistler force plate. Apart from commonly registered COP displacements, an additional variable describing the process of keeping body balance by a basketball player was ankle joint stiffness on the basis of which an “Index of Balance–Stiffness” (IB-S) was created. Results: Statistically significant differences were obtained for the maximum COP displacements and ankle joint stiffness between measurements of balance in the standing position before and after the employed movement tasks whereas there were no statistically significant differences for the aforementioned variables describing the process of keeping balance between measurements after running and after jumping. Conclusions: The research results indicate that the employed movement activities brought about significant changes in the process of keeping balance of basketball player in the standing position which, after the run performed, remain on a similar level to the series of jumps being performed. The authors attempted to establish an index based on the stiffness which yields a possibility to perceive each basketball player as an individual person in the process of keeping balance.
    Źródło:
    Acta of Bioengineering and Biomechanics; 2015, 17, 2; 103-109
    1509-409X
    2450-6303
    Pojawia się w:
    Acta of Bioengineering and Biomechanics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Transitions Induced in HoCo$\text{}_{3}$Ni$\text{}_{2}$ Single Crystals
    Autorzy:
    Zawadzki, J.
    Ballou, R.
    Gorges, B.
    Szymczak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1928269.pdf
    Data publikacji:
    1993-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.30.Kz
    75.50.Gg
    75.60.Ej
    Opis:
    The magnetic studies of temperature and field induced phase transitions were performed on single crystals of HoCo$\text{}_{3}$Ni$\text{}_{2}$ compound. The rotational-type spin reorientation was found between T$\text{}_{SR1}$ = 160 K and T$\text{}_{SR2}$ = 200 K. In the vicinity of T$\text{}_{SR1}$ two different field induced transitions were observed: the first order moment reorientation type transition in the basal plane and the spin reorientation from the easy plane to the c-axis with simultaneous increase in spontaneous magnetization. The intersublattice molecular field coefficient as well as the magnetization anisotropy of Ho sublattice were determined. The observed magnetic behaviour was analysed within the framework of the spin-reorientation model, taking into account the change of the intrinsic states of rare-earth ions caused by their huge anisotropy energy. The thermal variation of the anisotropy constants of the studied compound is also presented.
    Źródło:
    Acta Physica Polonica A; 1993, 83, 2; 209-218
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie drzew klasyfikacji do określenia preferencji środowiskowych gatunków na przykładzie głuszca (Tetrao urogallus)
    Application of classification trees for assessment species habitat preferences on the example of capercaillie (Tetrao urogallus)
    Autorzy:
    Bolibok, L.
    Brzeziecki, B.
    Drozdowski, S.
    Zawadzka, D.
    Zawadzki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/990006.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    preferencje srodowiskowe
    metody analizy
    drzewo klasyfikacyjne
    classification
    tetrao urogallus
    environmental preferences
    augustowska forest
    Opis:
    Habitat preferences of capercaillie Tetrao urogallus in the Augustowska Forest (NE Poland) were evaluated using classification trees. Data were collected on 1033 circular sampling plots localized on leks and in their vicinity with 1 km radius. Gathered information described tree stands (site conditions, age, species composition, tree density, closure, vertical structure, lower strata coverage (saplings and shrubs) and blueberry coverage (Vaccinium myrtillus) as well signs of capercaillie presence. The analysis shows that for capercaillie of key importance are tree stands growing on fresh or wet coniferous sites, more than 100 years old, with density less than 446 trees/ha, with anthill and situated more than 150 from a road.
    Źródło:
    Sylwan; 2014, 158, 04; 267-276
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Efekty zastosowania skrzynek lęgowych w drzewostanie sosnowym Nadleśnictwa Tuchola
    Effects of the application of hatching boxes in a pine stand of the Tuchola Forest District
    Autorzy:
    Sikora, S.
    Kilian, K.
    Kuzma, B.
    Raczynski, M.
    Zawadzki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/791326.pdf
    Data publikacji:
    2013
    Wydawca:
    Wyższa Szkoła Zarządzania Środowiskiem w Tucholi
    Źródło:
    Zarządzanie Ochroną Przyrody w Lasach; 2013, 07
    2081-1438
    2391-4106
    Pojawia się w:
    Zarządzanie Ochroną Przyrody w Lasach
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Występowanie, kondycja i zagrożenia zimoziołu północnego w Puszczy Augustowskiej
    The twinflower in the Augustow Forest: occurrence, condition and threats
    Autorzy:
    Zawadzka, D.
    Zawadzki, G.
    Bednarek, J.
    Bednarek, J.B.
    Piechowska, D.
    Mikitiuk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1293182.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    lesnictwo
    lasy
    Puszcza Augustowska
    inwentaryzacja przyrodnicza
    rosliny chronione
    rosliny ginace
    zimoziol polnocny
    Linnaea borealis
    wystepowanie
    stanowiska
    kondycja
    zagrozenia roslin
    Opis:
    The twinflower Linnaea borealis L. is a rare, boreal plant species that grows in coniferous forests and is partly protected in Poland. We studied its distribution and the condition of twinflower patches in the Augustów Forest (NE Poland) describing 22 twinflower patches in total. The following features were assessed: (1) patch area, (2) distance between individual twinflowers, (3) patch density, (4) intensity of flowering, (5) fruiting, (6) main accompanying plant species, (7) plant community structure, (8) species composition and age of the forest stands, (9) canopy cover of the forest stands, (10) existing and potential threats. In the northern part of the forest where suitable pine sites dominated, twinflowers were distributed irregularly and unevenly. Twinflowers in the Augustów Forest occur in relatively big areas with individual patches covering from 100 m2 to 3000 m2, but most commonly 500–1000 m2. The mean distance to the nearest neighbouring twinflower was 1600 m (range from 250 m to 6035 m). This pattern of distribution and separating distance does allow for sexual reproduction within the studied forest stand and blooming was confirmed in 21 out of 22 patches. In four locations, intensive blooming with >50 flowers shoot/m2 was observed. We did not observe a dependency of the flowering intensity on patch size. Despite the intensive and frequent flowering, as well as the presence of fruits, which were found in 15 patches, the twinflower reproduces mainly vegetatively. Twinflowers grew in 34–166 years-old pine-spruce stands with moderate canopy cover, but there was no relationship between the age of forest stands and the size of a flower patch. Plant species, which commonly occurred with twinflowers were: Vaccinium myrtillus, Calamagrostis arundinacea, Goodyera repens, Rubus saxatilis, Fragaria vesca, Pleurosium schreberi. Twinflower communities are threatened by invasive species in the forest understory in two locations only, while in the other locations no active protection is needed and the plants should rather be protected and monitored through multifunctional forest management. We emphasise the importance of the Augustów Forest for the twinflower in Poland, because about 10% of the Polish population grows in this forest complex.
    Źródło:
    Leśne Prace Badawcze; 2017, 78, 1
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena preferencji środowiskowych głuszca Tetrao urogallus i możliwość ich uwzględnienia w realizacji zadań z hodowli lasu
    An assessment of Capercaillie Tetrao urogallus habitat preferences and possibility of their consideration in fulfilment of forest management tasks
    Autorzy:
    Brzeziecki, B.
    Drozdowski, S.
    Zawadzka, D.
    Zawadzki, J.
    Buraczyk, W.
    Gawron, L.
    Bielak, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/880847.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Leśny Zakład Doświadczalny. Centrum Edukacji Przyrodniczo-Leśnej w Rogowie
    Tematy:
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    preferencje srodowiskowe
    Puszcza Augustowska
    Źródło:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej; 2011, 13, 2[27]
    1509-1414
    Pojawia się w:
    Studia i Materiały Centrum Edukacji Przyrodniczo-Leśnej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparative assessment of selected intraoral microorganisms – potential factors for peri-surgical management complications
    Autorzy:
    Zawadzki, P.J
    Starosciak, B.
    Perkowski, K.
    Baltaza, W.
    Padzik, M.
    Pionkowski, K.
    Chomicz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/6223.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    In this research, a comparative analysis of results of investigations involving different human populations, in terms of a relation between the oral cavity health and the species composition of mouth microbiota is reported. The purpose of this analysis was to identify and assess microorganisms that could cause health complications in patients with neoplasm requiring dental problem-related surgical management. The patients with the oral cancer surgically treated and those without neoplasm were assessed for their oral health: status of teeth, gingiva, periodontium, and occurrence of inflammatory processes. From each patient, microorganisms isolated of periodontium, dental plaque, and dental pocket swabs were identified in wet and stained microscopic preparations; standard microbiology in vitro techniques were also applied to determine the fungal and bacterial strains. The comparative analysis of results of direct microscopic examinations and in vitro cultures assessment indicated significant differences in prevalences of fungi, parasitic oral protozoans and bacteriae in particular patient’s groups. Yeast-like fungi belonging to Candida genus, mostly of C. albicans group, were identified in 93.75% patients with the oral cancer, while in 25% of individuals assessed without neoplasm. E. gingivalis amoebae were only found in 12.5% patients with the serious disease; no trichomonads were detected in all patients analyzed. Among bacteria species, potentially pathogenic Enterobacteriaceae were found in the patients with oral cancer. The pronounced shift in the microbiota species composition in the patients who needed prolonged treatment due to oral cavity cancer, compared to other generally healthy persons has been showed in this analysis.
    Źródło:
    Annals of Parasitology; 2016, 62, 3
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of selected oral cavity microbiota – risk factors of management complications in patients with masticatory system disorders
    Autorzy:
    Zawadzki, P.J.
    Perkowski, K.
    Starosciak, B.
    Dybicz, M.
    Baltaza, W.
    Pionkowski, K.
    Chomicz, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/6035.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Opis:
    The retrospective analysis of data on oral cavity clinical status in relation to microbiota species composition is presented. The research regards patients of different age, with and without congenital malformation, pretreatment assessed for occurrence of pathological changes in the masticatory system. Samples of the swabs collected from each patient (from dental plaque, periodontium and dental pockets) were used for identification of oral protozoans in wet slides and stained preparations; additionally, transmission electron microscope examination was performed. The material was used for in vitro cultures to identify bacteria strains. Clinically, intensity of tissue deteriorations was higher in patients with a congenital disease. Alive Trichomonas tenax and Entamoeba gingivalis, species with confirmed pathogenic impact on oral cavity and neighboring structures, were detected with higher prevalence in older patients. Enterococci, Staphylococcus aureus, various Enterobacteriaceae were more frequently detected in patients with somatic and mental retardations; in mouths of those patients, Klebsiella pneumonia and Pseudomonas aeruginosa opportunistic strains occurred. Masticatory system abnormalities favor colonization of oral cavity by exogenous species and dissemination of infections, especially dangerous for patients with congenital diseases. Oral microbiota assessment and preventive measures may be helpful to avoid subsequent peri-surgery complications.
    Źródło:
    Annals of Parasitology; 2016, 62, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of Linola and W92/72 transgenic flax seeds on the rabbit caecal fermentation - in vitro study
    Autorzy:
    Mista, D.
    Kroliczewska, B.
    Zawadzki, W.
    Pecka, E.
    Steininger, M.
    Hull, S.
    Zuk, M.
    Szopa, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/30370.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Opis:
    The effect of W92/72 transgenic flax seeds taken from a variety of Linola on the production of SCFA, ammonia and methane by bacteria inhabiting rabbit caecum was studied. The in vitro method was used where caecal contents from rabbits was incubated with W92/72 transgenic or Linola flax seeds, or without any additives (control samples).The total concentration of SCFA was higher in samples with the addition of flax seeds than in the control samples. The increase in concentrations of acetic, propionic and butyric acids was the highest in samples with Linola seeds added. A higher percentage of propionic and butyric acids was observed in the contents incubated with addition of flax seeds as compared to the control samples. This increase was the result of a percentage decrease in acetic acid. No differences were observed in the concentration of ammonia between fermented samples. Moreover, the addition of flax seeds resulted in slight decrease of pH in incubated samples. In gas samples, the methane level was higher in samples with flax seeds added, although the highest level was found in samples with transgenic seeds.In addition, gas pressure was significantly higher in samples with flax seeds added as compared to control samples, and this may indicate a higher intensity of microbiological fermentation processes. These studies suggest that neither Linola nor W92/72 flax seeds have any unfavorable effect on the caecal microflora activity of rabbits. A beneficial influence of flax seeds on the microbiological fermentation process in rabbit caecum was observed, based on an increase in percentage ratio of propionic acid in samples with flax seeds added.
    Źródło:
    Polish Journal of Veterinary Sciences; 2011, 14, 4
    1505-1773
    Pojawia się w:
    Polish Journal of Veterinary Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Liczebność i rozmieszczenie głuszca w Polsce w XXI wieku
    Population size and distribution of the capercaillie in Poland in the 21st century
    Autorzy:
    Zawadzka, D.
    Żurek, Z.
    Armatys, P.
    Stachyra, P.
    Szewczyk, P.
    Korga, M.
    Merta, D.
    Kobielski, J.
    Kmieć, M.
    Pregler, B.
    Krzan, P.
    Rzońca, Z.
    Zawadzki, G.
    Zawadzki, J.
    Sołtys, B.
    Bielański, J.
    Czaja, J.
    Flis-Martyniuk, E.
    Wediuk, A.
    Rutkowski, R.
    Krzywiński, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/980118.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    lowiectwo
    ptaki lowne
    gatunki chronione
    gluszec
    Tetrao urogallus
    wystepowanie
    liczebnosc populacji
    rozmieszczenie przestrzenne
    Polska
    wiek XXI
    tetrao urogallus
    species distribution
    species abundance
    refuges
    poland
    Opis:
    The data on the distribution and number of the capercaillie Tetrao urogallus in Poland for the period from the end of the 20th century up to 2017−2018 is presented. The capercaillie is a sedentary forest grouse living in old mountain forests and within the boreal zone. Since more than a century, the decrease in the numbers of the species has been observed, interlinked with the extinction of isolated populations. Within the present borders of Poland, a 1925 questionnaire study noted 2200−2700 individuals. In the 1960s, the national population was estimated at 1700−2000 birds, living in five isolated populations. In 1985−1995, the population numbers of the capercaillie dropped to approx. 466−700 individuals in four regions, and in 2000 it was estimated at 470−570 birds. According to the results of the censuses performed in 2017−2018, the size of the capercaillie population risen to 523−631 individuals and 59−69 lekking grounds. Currently the capercaillie occurs in four isolated regions. These are the Western Carpathians (the Beskid Sądecki, Tatry, Gorce, Babia Góra, Beskid Żywiecki, and the Beskid Śląski ranges) where 284−326 individuals live and 35−41 leks are active. In the Solska and the Lasy Janowskie Forests (Lublin region), the population was estimated at 132−184 individuals and 12−13 lekking grounds. In the Augu− stów Forest (Podlasie region) 36−46 individuals and 5−7 leks were found. In the Bory Dolnośląskie Forest, where native capercaillies got extinct during the last decade, the reintroduction program resulted in the rebuilding of their 65−75 population (with 6−7 leks). The restitution of the species in the Piska Forest has begun. During the last 20 years, populations in the Carpathian national parks have been stable, although fluctuating in numbers. The increase in the number of individuals in the Augustów Forest as well as in the Sądecki and Beskid Śląski Mountains is an after−effect of the release of birds from breeding centers or translocations. In other strongholds, fluctuations or decreases have been recorded, including wisible in the Beskid Żywiecki Mountains.
    Źródło:
    Sylwan; 2019, 163, 09; 773-783
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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