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    Wyświetlanie 1-9 z 9
    Tytuł:
    Valuable roadside tree avenues in the North-Eastern part of The Drawski Landscape Park
    Autorzy:
    Grzegorczyk, R.
    Sigiel-Dopierala, A.
    Dyderski, M.K.
    Jagodzinski, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/790661.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Przyrodniczy w Poznaniu
    Tematy:
    roadside tree
    tree
    epiphyte
    health status
    roadside green
    cultural heritage
    nature monument
    Drawsko Landscape Park
    Opis:
    The observation of the rapid rate of plant cover transformation caused by urbanization and agricultural technology was the inspiration for undertaking the study in rural areas. The study was carried out in the Sandomierz Basin in four typical villages with varying degrees of the anthropogenic impact. The changes observed included: Koszyce Małe – evident transformation of fields and meadows into building land; Kolbuszowa Dolna – intensive changes in land use, abandonment of fields and meadows, and river regulation; Roźwienica – emergence of new habitats for plant colonization after reclamation of land previously occupied by a brick factory and a landfill; Krzeczowice – intensive crop cultivation and unchanged land use. In 2009–2010, floristic investigations with the patrol method were carried out in these areas. The historical-geographical classification and indices of the anthropogenic changes of the flora were employed in the analysis. Substantially, domination of synanthropic species over non-synanthropic spontaneophytes was noted in the analysed floras. In the synanthropic species group, the proportion of apophytes was 3-fold higher than that of anthropophytes. Archaeophytes were more abundant than kenophytes. The flora of Krzeczowice, an area affected by long-term anthropopressure, was by approx. 30% less abundant than that in the other villages; it was also characterised by the highest synanthropization index, apophytization index, and index of apophytism of spontaneophytes. In turn, the flora found in Kolbuszowa Dolna was rich due to the presence of a wide variety of habitats; it was characterised by the lowest apophytization index accompanied by the highest anthropophization index.
    Źródło:
    Steciana; 2015, 19, 2
    1689-653X
    Pojawia się w:
    Steciana
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocena zgodności rozkładów empirycznych pierśnic drzewostanów bukowych różnych klas wieku z wybranymi rozkładami teoretycznymi
    Goodness of fit evaluation of the breast height diameter distributions of beech stands differing in age with selected theoretical distributions
    Autorzy:
    Jagiełło, R.
    Beker, C.
    Jagodziński, A.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/989389.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    drzewostany bukowe
    klasy wieku
    buk zwyczajny
    Fagus sylvatica
    piersnice drzew
    rozklad empiryczny
    rozklad teoretyczny
    ocena zgodnosci
    diameter distribution
    finite mixture distribution
    beech stand
    fagus sylvatica
    Opis:
    Modelling is one of the basic activities in the field of biological sciences. The main purpose of modelling is to illustrate relationships and phenomena of biological objects (and traits describing them) and present reality as close as it is possible with expected range of error. In the paper we presented results of approximation of the selected theoretical distributions, i.e. singular (normal, log−normal, gamma, two− and three−parameter Weibull, Johnsons SB) and finite mixture (normal, log−normal, gamma and Weibull) to tree diameter distributions in beech stands (Fagus sylvatica L.). The main aim of the study was to evaluate goodness of fit of selected distributions, prove legitimacy of using mixture distributions in even−aged, single−species beech stands and find the best distribution of model diameter distribution in a whole production cycle of this kind of stands. The study was conducted in 32 sample plots located in north−western Poland in stands at the age between 9 and 140. For the evaluation χ² test, a modified error index (e) and a root mean square error (RMSE) were used. We found that the RMSE and e are related in most cases with stand density. Mean values of used indicators show that finite mixture distributions are better in comparison to singular distributions. The best fitted distributions were Johnsons SB and mixture of gamma ones. Range of error index expressed with number of trees per hectare ranges 16.5−32.8% and 7.7−27.0% for this distributions, respectively. Conversely the worst results were obtained by fitting two−parameter Weibull distribution both in singular and mixture. Future diameter distribution model based on the probability distribution should be based on Johnson SB or 3−parameter Weibull distribution from singular ones or gamma from finite mixture. In case of age class apportionment unequivocal the best result were obtained with Johnson SB and partially with mixture gamma distributions.
    Źródło:
    Sylwan; 2016, 160, 02; 107-119
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Obraz Katynia w literaturze świata
    Autorzy:
    Krzyżanowski, Jerzy R.
    Powiązania:
    Dziennik Polski i Dziennik Żołnierza. Tydzień Polski (Londyn) 2000, nr 20, s. 8 ; nr 21, s. 9
    Współwytwórcy:
    Jagodziński, Zdzisław. Sprostowanie
    Data publikacji:
    2000
    Tematy:
    Komorowski, Eugene A.
    Egzekucja polskich oficerów w Katyniu w literaturze
    Opis:
    Sprost.: Prostuję i uzupełniam / Zdzisław Jagodziński.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Obraz Katynia w literaturze świata
    Autorzy:
    Krzyżanowski, Jerzy R.
    Powiązania:
    Dziennik Polski i Dziennik Żołnierza. Tydzień Polski (Londyn) 2000, nr 20, s. 8 ; nr 21, s. 9
    Współwytwórcy:
    Jagodziński, Zdzisław. Sprostowanie
    Data publikacji:
    2000
    Tematy:
    Komorowski, Eugene A.
    Jeńcy wojenni polscy ZSRR 1939-1940 r. literatura
    Egzekucja polskich oficerów w Katyniu literatura
    Opis:
    Sprost.:; Prostuję i uzupełniam; Zdzisław Jagodziński; Dziennik Polski i Dziennik Żołnierza. Tydzień Polski (Londyn); nr 22; s. 8.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Zbiorowiska roślinne doliny Czerwonej Wody w Parku Narodowym Gór Stołowych
    Plant communities of the Czerwona Woda River Valley (Stołowe Mountains National Park)
    Autorzy:
    Pielech, R.
    Malicki, M.
    Smoczyk, M.
    Jagodziński, A.
    Dyderski, M.K.
    Horodecki, P.
    Wierzcholska, S.
    Skorupski, M.
    Kamczyc, J.
    Kałucka, I.
    Hachułka, M.
    Gazda, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292420.pdf
    Data publikacji:
    2018
    Wydawca:
    Instytut Badawczy Leśnictwa
    Tematy:
    Gory Stolowe
    doliny rzeczne
    parki narodowe
    Park Narodowy Gor Stolowych
    dolina Czerwonej Wody
    fitosocjologia
    zbiorowiska roslinne
    roslinnosc rzeczywista
    roslinnosc potencjalna
    river valley
    riparian vegetation
    plant communities
    Stołowe Mountains
    Central Sudetes
    Opis:
    The Czerwona Woda River is the main watercourse in the Stołowe Mountains National Park and drains the major part of the Stołowe Mts. It was regulated in the past, but its channel has been spontaneously naturalized. Now, managed spruce forests grow along almost the entire length of this small mountain stream. The aims of the present study were to investigate diversity of plant communities connected with the Czerwona Woda stream and to prepare detailed vegetation maps. The results obtained can potentially be a reference for future restoration projects implemented in the Stołowe Mountains National Park. As a result of vegetation mapping, there were distinguished 20 plant communities representative of the current vegetation and 3 communities representative of the potential vegetation. Phytosociological data on the vegetation was documented by making 62 phytosociological relevés. Based on these, 9 forest communities were distinguished, of which 3 were classified into associations, 1 – into alliance, 5 – into secondary forest communities. Furthermore, there were distinguished 14 non-forest communities, of which 10 were classified into associations. Several of the phytosociological classes distinguished have been reported for the first time in the Stołowe Mountains National Park.
    Źródło:
    Leśne Prace Badawcze; 2018, 79, 2
    1732-9442
    2082-8926
    Pojawia się w:
    Leśne Prace Badawcze
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mechanical properties and biodegradability of flax fiber-reinforced composite of polylactide and polycaprolactone
    Właściwości mechaniczne i biodegradowalność wzmocnionego włóknami lnianymi kompozytu polilaktydu z polikaprolaktonem
    Autorzy:
    Rytlewski, P.
    Stepczyńska, M.
    Moraczewski, K.
    Malinowski, R.
    Jagodziński, B.
    Żenkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/947048.pdf
    Data publikacji:
    2018
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
    Tematy:
    polylactide
    polycaprolactone
    flax fibers
    mechanical properties
    biodegradation
    polilaktyd
    polikaprolakton
    włókna lniane
    właściwości mechaniczne
    biodegradacja
    Opis:
    The aim of this work was to produce a composite based on the blend of polylactide and polycaprolactone and reinforced with flax fiber, intended for processing by injection molding, with improved mechanical and biodegradation properties as compared to neat polylactide (PLA) and polycaprolactone (PCL). The material was prepared by mixing PLA, PCL and flax fibers (about 5 mm long), extrusion and granulation with subsequent injection molding to obtain test samples. The composites differed in the content of PCL (0, 5, 10, 15 and 30 wt %) whereas the content of flax fibers was kept constant (20 wt %). The samples were characterized by means of scanning electron microscopy (SEM), tensile and impact strength measurements, differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Biodegradation studies were carried out using proteinase K at laboratory conditions. It was found that a reduction of fiber lengths took place during the extrusion process and that addition of flax fibers to PLA/PCL blend resulted in an increase in elastic modulus and biodegradation rate. The composite impact strength was significantly improved at 30 wt % PCL fraction.
    Celem badań było opracowanie kompozytu wzmocnionego włóknem lnianym na osnowie z mieszaniny polilaktyd/polikaprolakton, przeznaczonego do przetwórstwa metodą wtryskiwania, wykazującego lepsze właściwości mechaniczne oraz lepszą biodegradowalność niż niemodyfikowane polilaktyd (PLA) i polikaprolakton (PCL). Materiał przygotowano metodą wytłaczania. PLA, PCL oraz włókna lniane (o długości około 5 mm) mieszano, wytłaczano, granulowano, a następnie wtryskiwano w celu uzyskania próbek do badań. Kompozyty różniły się zawartością PCL (0, 5, 10, 15 lub 30% mas.), natomiast udział procentowy włókien lnianych był stały (20% mas.). Próbki badano metodami: skaningowej mikroskopii elektronowej (SEM), różnicowej kalorymetrii skaningowej (DSC) oraz dynamicznej analizy mechanicznej (DMA). Oceniano też ich wytrzymałość na jednoosiowe rozciąganie i udarność. Podatność na biodegradację badano w warunkach laboratoryjnych z zastosowaniem enzymu proteinazy K. Stwierdzono, że w procesie wytłaczania nastąpiła znaczna redukcja długości włókien lnianych, ich dodatek do mieszaniny PLA/PCL wpłynął na zwiększenie modułu sprężystości i szybkości biodegradacji, a udział 30% mas. PCL wyraźnie poprawił udarność kompozytu.
    Źródło:
    Polimery; 2018, 63, 9; 603-610
    0032-2725
    Pojawia się w:
    Polimery
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sedimentary record of 2010 and 2011 Warta River seasonal floods in the region of Poznań, Poland
    Autorzy:
    Skolasińska, K.
    Szczuciński, W.
    Mitręga, M.
    Jagodziński, R.
    Lorenc, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059798.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    lowland river
    flood deposits
    overbank sedimentation
    postdepositional changes
    Warta River
    Central Europe
    Opis:
    The Warta River near Poznań (West Poland) represents a meandering lowland river modified by hydro-engineering projects. Recently, two large floods occurred during the summer of 2010 and the winter of 2011. Rapid response surveys were conducted to document erosion and sedimentary records of the floods (spatial extent, grain size, composition, grain microtextures). Follow-up studies, which were conducted during the two years after the floods, assessed postdepositional changes in the flood deposits. A thick sand layer formed that ranged from an average of 10–15 cm (summer) to 30–35 cm (winter), building natural levees, side bars and crevasse splays. The sand layers consisted of fine- and medium-grained sands that were well-sorted, fine skewed and sourced from the river channel. The longer but smaller winter flood produced thicker and coarser deposits at different sites compared with the summer flood. An organic-rich mud layer and algal mats, which were short-existing, were also detected on the floodplain. The study proved that the flood record on engineered rivers may be only in the sand bodies near the river channel and their preservation is mainly controlled by their thickness. A single site may not record all floods, as particular events tend to leave deposits in various places.
    Źródło:
    Geological Quarterly; 2015, 59, 1; 47--60
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in chemical composition of needle and leaf litter from exotic and native tree species stands
    Autorzy:
    Skorupski, M.
    Jagodzinski, A.M.
    Zytkowiak, R.
    Karolewski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/41087.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    chemical composition
    differentiation
    needle
    leaf litter
    exotic plant
    native species
    tree
    plant species
    stand
    nitrogen
    phenolics
    carbohydrate
    carbon
    Opis:
    The potential differentiations in litter chemistry among native and non-native trees are poorly understood. We compared the chemical composition of leaf litterfall of 11 exotic tree species, e.g. coniferous: Abies cephalonica, A. grandis, A. procera, Chamaecyparis pisifera, Pinus peuce, Pseudotsuga menziesii, Thuja plicata, and deciduous: Acer rubrum, A. saccharum, Betula alleghaniensis and Quercus rubra, with that of a native European conifer, Pinus sylvestris (as reference to coniferous species) anda mixture of native European Quercus robur, Carpinus betulus, Tilia cordata, T. platyphyllos and Corylus avellana leaves (as a reference mixture of deciduous species). We found significant differences among the species studied in nitrogen and carbon content in needles/leaves, C/N ratio, as well as total soluble phenolic compounds (TPh) and total nonstructural carbohydrates (TNC) content, including soluble carbohydrates and starch. However, we found no clear differentiation of exotic from native tree species in the analyzed elements and metabolites. Among the exotic coniferous tree species, P. menziesii stood out among the species studied – fallen needles of this species were characterized by relatively high TPh and TNC content. The relationships between TPh and TNC content in leaf and needle litter among tree species were similar among two consecutive years. For deciduous tree species, the tendency of higher TPh content and C/N ratio in leaves falling earlier (September; leaves of sun-type) than later (November; leaves of shade-type) was more distinct than in coniferous tree species. Generally, we cannot see any special differences in the levels or mutual quantitative relationships of the chemical compounds studied in fallen needles/leaves of exotic tree species in comparison with native tree species.
    Źródło:
    Dendrobiology; 2012, 68
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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