Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Markowski, A." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-6 z 6
    Tytuł:
    Variability in and correlations among selected physical properties of European larch (Larix decidua Mill.) seeds
    Autorzy:
    Kaliniewicz, Z.
    Tylek, P.
    Anders, A.
    Markowski, P.
    Rawa, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/297835.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    seeds
    physical properties
    coefficients
    correlation
    Opis:
    Selected physical attributes of European larch seeds harvested from 2 seed plantations and 2 commercial seed stands in north-eastern Poland were determined. The physical properties of seeds were measured, and the results were used to calculate indicators of seed weight and the frictional and geometric properties of seeds. Physical attributes and indicators were compared by Student’s t-test for independent samples, analysis of variance, correlation analysis and linear regression analysis. The average values of physical properties and indicators were determined at: critical transport velocity - from 5.93 to 6.13 m • s-1, thickness - from 1.25 to 1.43 mm, width - from 2.29 to 2.71 mm, length - from 3.71 to 4.57 mm, angle of sliding friction - from 27.85 to 31.98o, weight - from 4.03 to 6.14 mg, coefficient of sliding friction - from 0.54 to 0.63, arithmetic mean diameter - from 2.42 to 2.90 mm, geometric mean diameter - from 2.20 to 2.60 mm, aspect ratio - from 59.60 to 62.38%, sphericity index - from 57.27 to 59.40%, specific weight - from 1.81 to 2.33 g • m-1, volume - from 4.60 to 7.59 mm3 and density - from 0.82 to 0.91 g • cm-3. The material harvested in seed plantations differed from seeds from commercial seed stands in all parameters, excluding critical transport velocity. Seed weight was most correlated with the remaining parameters. The highest value of the correlation coefficient and the equation with the highest value of the coefficient of determination were reported for the dependence between seed weight and seed length. Seed weight was also relatively highly correlated with seed width, therefore, the use of mesh screens with round openings and/or cylindrical grain graders is recommended in seed sorting processes.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(2); 123-134
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ wieku drzewostanu macierzystego na wybrane cechy fizyczne nasion świerka pospolitego
    Influence of the age of parent stand on selected physical properties of Norway spruce seeds
    Autorzy:
    Kaliniewicz, Z.
    Markowski, P.
    Anders, A.
    Tylek, P.
    Krzysiak, Z.
    Fura, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/987167.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    lesnictwo
    hodowla lasu
    drzewostany mateczne
    wiek drzewostanu
    wiek drzew
    swierk pospolity
    Picea abies
    nasiona
    cechy fizyczne
    sortowanie
    tree age
    seeds
    properties
    variation
    correlation
    sorting
    picea abies
    Opis:
    The objective of this study was to determine the influence of the age of parent tree stand on selected physical properties of Norway spruce seeds to improve the efficiency of seed separation processes. Seeds were harvested in a forest complex located in the seed zone No. 202, in the municipality of Kruklanki in the Borki Forest District (N Poland) during mast years (1999, 2004, 2007 and 2012). The experimental material comprised of Norway spruce seeds from three differently aged tree stands (86, 119 and 129 years old in the first harvest year). The following measurements were performed for each seed: terminal velocity – with a pneumatic classifier; length and width – with a laboratory microscope; thickness – with a thickness gauge; angle of external friction – on an inclined plane, in two positions on a steel friction plate, and mass – with a laboratory scale. The results were used to calculate the arithmetic and geometric mean diameters, aspect ratio, sphericity index and density of seeds. The values of the analyzed properties were compared with ANOVA for factorial designs and linear correlation analysis. The results of the study indicate that Norway spruce seeds obtained from cones harvested in 2012 are characterized by the highest thickness and, consequently, by the highest values of the aspect ratio and sphericity index. The age of parent trees significantly influences the majority of physical properties of seeds. However, the patterns of observed changes are difficult to interpret due to the impact of weather conditions and the genetic potential of parent trees, which perform differently in response to changing climate and geomorphological conditions. Over the analyzed 13−year period a gradual increase was noted in the width, geometric mean diameter, aspect ratio and sphericity index of seeds, whereas the length and density of seeds decreased. Therefore, Norway spruce seeds should be separated mostly with the use of mesh screens with longitudinal openings, pneumatic separators and graders. The use of those devices, separately or in combination, for sorting Norway spruce seeds into mass fractions could contribute to more uniform seedling emergence when every seed fraction is sown separately.
    Źródło:
    Sylwan; 2017, 161, 07; 548-557
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlations between basic physical parameters of nuts and the weight of common beech (Fagus sylvatica L.) seeds
    Autorzy:
    Kaliniewicz, Z.
    Tylek, P.
    Anders, A.
    Markowski, P.
    Rawa, T.
    Andros, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/297912.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    nuts
    seeds
    physical properties
    variation
    correlation
    Opis:
    Selected physical attributes of common beech nuts harvested from four tree stands in northern Poland were determined. Seeds were manually extracted from every nut. Seeds and nuts were weighed, and the results were used to determine the ratio of seed weight to nut weight, which described the degree of nut filling. Physical parameters and the calculated coefficients were compared by the t-test for independent samples, analysis of variance, correlation analysis and linear regression analysis. The following ranges of variation were reported in the physical attributes of nuts and the coefficients of common beech seeds: critical transport velocity of nuts - from 6.33 to 11.28 m s-1, nut thickness - from 4.76 to 9.86 mm, nut width - from 6.46 to 13.54 mm, nut length - from 12.63 to 21.62 mm, angle of sliding friction of nuts - from 15.67 to 26.67o, nut weight - from 93.0 to 513.7 mg, coefficient of sliding friction of nuts - from 0.28 to 0.50, seed weight - from 11.0 to 374.8 mg, and ratio of seed weight to nut weight - from 0.08 to 0.88. The majority of nuts contained one seed (average weight of 195.36 mg), and only 2.3% of nuts contained two seeds (average weight of 103.11 mg). The attribute that was most highly correlated with the ratio of seed weight to nut weight was seed weight (0.685), followed by critical transport velocity (0.527) and weight of nuts (0.493). The results indicate that common beech seeds would be processed most effectively in vibration-pneumatic separators or, alternatively, in pneumatic separators where nut fractions obtained with the use of mesh screens can be sorted separately.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(1); 5-14
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of correlations between selected physical properties and color of scots pine (Pinus sylvestris L.) seeds
    Autorzy:
    Kaliniewicz, Z.
    Tylek, P.
    Markowski, P.
    Anders, A.
    Rawa, T.
    Głażewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/298468.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    pine
    seed
    physical attributes
    color
    correlation
    Opis:
    Selected physical properties of Scots pine seeds harvested from five plantations in north-eastern Poland were determined. Seed color was determined in a sensory analysis, and seeds were classified into one of four color groups: black, brown, gray or other. The results of measurements were used to calculate indicators of seed weight and seeds’ frictional and geometric properties. Physical attributes and indicators were compared by one-way analysis of variance, correlation analysis and linear regression analysis. The average values of physical properties and indicators characterizing seeds from different color groups were determined at: critical transport velocity - from 7.0 to 7.1 m • s-1, thickness - from 1.48 to 1.50 mm, width - from 2.51 to 2.54 mm, length - from 4.32 to 4.46 mm, angle of sliding friction - from 29.1 to 29.8o, weight - from 6.4 to 6.7 mg, coefficient of sliding friction - from 0.56 to 0.58, arithmetic mean diameter - from 2.77 to 2.82 mm, geometric mean diameter - from 2.52 to 2.55 mm, aspect ratio - from 56.91 to 58.64%, sphericity index - from 57.44 to 58.69%, specific weight - from 2.51 to 2.60 g • m-1, volume - from 7.90 to 8.24 mm3 and density - from 0.80 to 0.82 g • cm-3. Selected color groups differed only in length, aspect ratio and sphericity index. Seed weight was most highly correlated with the remaining attributes, and the highest value of the correlation coefficient and the equation with the highest value of the coefficient of determination were reported for the correlation between seed weight and thickness.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2014, 17(3); 259-274
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selected physical parameters of common hornbeam (Carpinus betulus L.) nuts
    Autorzy:
    Kaliniewicz, Z.
    Tylek, P.
    Markowski, P.
    Anders, A.
    Rawa, T.
    Liedtke, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/298164.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    common hornbeam
    seeds
    physical parameters
    range of variations
    correlation
    separation
    Opis:
    Selected physical parameters of common hornbeam nuts were determined in five batches of nuts harvested from seed tree stands in northern Poland. The results were used to calculate the arithmetic and geometric mean diameters, aspect ratio, sphericity index, volume and density of each nut. The above parameters were compared by analysis of variance, correlation analysis and linear regression analysis. Habitat conditions had a greater influence on nut plumpness than the age of the tree stand. Nut width was highly correlated with nut mass, and the above observation can be used in the process of separating nuts into mass categories. When two mesh screens with 5 mm and 6 mm openings are used, nuts will be separated into a fine-sized fraction containing 71.4% of nuts with reduced plumpness, 24.1% of moderately plump nuts and 1.8% of plump nuts, and a coarse-sized fraction containing 2.0% of nuts with reduced plumpness, 43.6% of moderately plump nuts and 54.4% of plump nuts.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(4); 247-259
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Basic physical properties of Norway spruce (Picea abies (L.) Karst.) seeds
    Autorzy:
    Kaliniewicz, Z.
    Markowski, P.
    Anders, A.
    Jadwisieńczak, B.
    Rawa, T.
    Szczechowicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/298166.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    seed
    dimension
    seed mass
    range of variations
    correlation
    separation
    Opis:
    The range of variations in a given separation parameter and its relationships with other attributes have to be determined for designing seed cleaning and sorting processes. In this study, those relationships were determined for five batches of Norway spruce seeds supplied by a seed extraction plant in Jedwabno. The seeds were harvested from seed stands in northern Poland. The terminal velocity, length, width, thickness and mass of every seed were determined. The results were used to calculate the geometric mean diameter, aspect ratio, sphericity index and density of the evaluated seeds. Those parameters were compared by analysis of variance and linear correlation analysis. Similarities in the average values of all physical properties were noted only between seeds harvested in the same seed zone, from tree stands occupying the same habitat type. The analyzed seeds can be effectively separated into mass fractions with the use of traditional sorting devices such as pneumatic separators, mesh sieves with longitudinal or round openings, cylindrical graders, winnowing machines and pneumatic sieves, in order to achieve more uniform seedling emergence when each seed fraction is sown separately.
    Źródło:
    Technical Sciences / University of Warmia and Mazury in Olsztyn; 2016, 19(2); 103-115
    1505-4675
    2083-4527
    Pojawia się w:
    Technical Sciences / University of Warmia and Mazury in Olsztyn
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies