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    Wyświetlanie 1-3 z 3
    Tytuł:
    Wpływ wybranych czynników na zawartość składników mineralnych w soku brzozy brodawkowatej (Betula pendula Roth)
    Influence of selected factors on the content of minerals in the silver birch (Betula pendula Roth) tree sap
    Autorzy:
    Staniszewski, P.
    Bilek, M.
    Szwerc, W.
    Gostkowski, M.
    Osiak, P.
    Żurek, N.
    Kocjan, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/978941.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    non−wood forest products
    silver birch sap
    minerals
    Opis:
    The aim of this study was to determine the content of selected minerals in silver birch sap, and to examine whether the tree thickness (DBH), the obtained daily volume of sap and the date of collection have an impact on their content. The study was carried out in central−eastern Poland, in the Garwolin Forest District, in a stand with a dominant share of silver birch at the age of 65, which grows on a moist mixed broadleaved forest habitat type. Sap from the selected trees was taken after 24 hours of leakage, four times, at weekly intervals. In each case, the daily sap volume was measured and the content of zinc, copper, and manganese was determined. As a result, no effect of tree diameter on the content of the studied elements was found. However, a negative relationship was stated between copper content and daily sap volume. Moreover, birch sap was characterized by increasing concentration of zinc and copper over time. The obtained results of the determination of the content of minerals in birch sap testify to the fact that it is characterized by high nutritional value. However, the large variability in its composition means that in order to obtain such benefits it is necessary to combine sap taken from as many trees as possible, while sap collected from only one tree may have a negligible nutritional value.
    Źródło:
    Sylwan; 2020, 164, 05; 424-431
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartość wybranych metali ciężkich w soku brzozy brodawkowatej (Betula pendula Roth) oraz dobowa objętość pozyskanego soku w zależności od pierśnicy drzew
    Content of heavy metals in the silver birch (Betula pendula Roth) tree sap and the daily volume of sap depending on tree diameter
    Autorzy:
    Staniszewski, P.
    Bilek, M.
    Szwerc, W.
    Gostkowski, M.
    Osiak, P.
    Poleszak, J.
    Kocjan, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/978960.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Leśne
    Tematy:
    non−wood forest products
    silver birch sap
    daily leak
    heavy metals
    Opis:
    The aim of this study was to determine the content of selected heavy metals in birch sap, and to examine whether the tree diameter, the obtained daily sap volume and the date of collection have an impact on their content. Moreover, it was decided to check whether the tree diameter could affect the intensity of the sap leak. The study was carried out in central−eastern Poland, in the Garwolin Forest District, in a stand with a dominant share of silver birch at the age of 65, which grows on a moist mixed broadleaved forest habitat type. Sap from the selected trees was taken after 24 hours of leakage, four times at weekly intervals. In each case, the daily sap volume was measured and the content of lead, nickel, chromium and cadmium was determined. No effect of tree diameter on the content of the studied elements was found. We also proved that the tree thickness had an impact on the daily sap volume. However, a negative relationship was stated between lead and cadmium content and daily sap volume. In turn, over time, birch sap was characterized by increasing concentration of lead and cadmium, while in the case of nickel downward trend was shown for two diameter classes. The obtained results of the determination of the con− tent of heavy metals in birch sap testify to the fact that for most of samples it is characterized by health safety. However, few exceedances of the most restrictive potable water as well as fruit juices and nectars standards are encountered, confirming the susceptibility of birch sap to heavy metal pollution. Therefore, in order to guarantee the safety of consumers, primarily it is necessary to select the collection points taking into account potential industrial and agricultural pollution and secondly – combining birch sap taken from as many trees as possible in order to average a very large variation in the content of heavy metals, both between individual trees and over time. It should also be noted that consum.
    Źródło:
    Sylwan; 2020, 164, 05; 432-440
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The uses of Betula pendula Roth among Hungarian Csangos and Szekelys in Transylvania, Romania
    Autorzy:
    Papp, N.
    Czegenyi, D.
    Hegedus, A.
    Morschhauser, T.
    Quave, C.L.
    Cianfaglione, K.
    Pieroni, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/57187.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    silver birch
    Betula pendula
    ethnobotany
    medicinal plant
    traditional knowledge
    birch sap
    Transylvania region
    Romania
    Opis:
    The aim of this work is to evaluate the ethnobotanical and ethnopharmacological use of Betula pendula Roth in various regions of Transylvania, in East and Central Romania. Silver birch is an important pioneer species in the country, which has traditionally been used in ethnomedicine, households and various customs. Among the ethnic groups, 55 informants from the Csángós and 68 from the Székelys were interviewed in six villages during field studies occurring between 2007 and 2012. Informants were asked questions about the medical and non-medical applications of B. pendula, focusing on the use of the leaf and woody parts in tools and customs, and on the collection and use of birch sap with its temporal change in local ethnomedicinal knowledge. Differences related to the use of birch among the studied areas were observed. The folk remedies prepared from the sap (“virics”) and leaves were documented in local customs, with similar symbolic roles assigned to birch used in other countries. Sap collection was performed during interviews and by manual means. Four special section types on the trunk were presented, and data concerning the nutritional and ethnomedicinal use of the sap was recorded. Both the significance and use of birch sap have drastically decreased in Transylvania due to the appearance of new phytotherapeutical sources and to social changes caused by migration of young people. We found that this phenomenon is gradually leading to the disappearance traditional harvesting techniques, frequency of use and ethnomedicinal knowledge concerning B. pendula in the studied regions.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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