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The purpose of the paper was to determine the impact of the most popular form of recreation and tourism (i.e. walking) on the environment in selected forests that were made available by the means of educational trails. The research was carried out in south−eastern Poland, in the forest reserves Bór (RB) and Polanki (RP) as well as in the economic forests of the Kołaczyce (NK) and Brzozów (NB) forest...
Bilberry, the most commonly collected fruit of Polish forests, has not only culinary values, but also proven therapeutic and preventive effects. It is a valuable forest raw material for herbal, pharmaceutical and food companies producing dietary supplements and drugs. The range of applications for bilberry is very wide, and the most important feature of this raw material is the high antioxidant potential...
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...
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...
Oak gall−nuts are pathological excrescences on the leaves of oaks (in Poland: Quercus robur L. and Q. petraea Liebl.) created by the Cynips quercusfolii L. The potential medical use of these non−wood forest products should be taken under consideration because of widespread use in folk medicine, but also because of the presence of gall−nuts of Middle Eastern oak species Quercus infectoria in the current...
The increasing social demand for food products collecting from the forests has beem observed currently. It should be assumed that one of the more and more important non−wood forest products in Poland is silver birch sap. Research in this area should concern not only the proper methods of its collection and yield, but also the rules of selecting forest stands and trees for its collection, as well in...
Studnie kopane, klasyfikowane obecnie jako tzw. „prywatne” ujęcia wody pitnej, przez wieki stanowiły nieodłączny element polskiego krajobrazu. Specyfika tych źródeł wody polega m.in. na dużej podatności na zanieczyszczenia, co związane jest zarówno z działalnością rolniczą jak i przemysłową człowieka. W związku z nimi każda studnia kopana wymaga stałego nadzoru, a paradoksalnie nie są one obecnie...
W pracy przedstawiono prosty aparat laboratoryjny wykorzystujący technikę osmozy odwróconej, przewidziany do zagęszczania wiosennego soku brzozowego. Wyznaczono punkt pracy urządzenia i przetestowano go na syntetycznym soku drzewnym. Dokonano trójetapowego zagęszczenia pięciu próbek soku naturalnego przy jednoczesnym monitorowaniu procesu. Uzyskano ponad trzykrotne zagęszczenie soku, co dało produkt...
W ramach badań nad wydłużaniem trwałości soków drzewnych stosowano dotychczas chemiczne dodatki do żywności. W niniejszej pracy podjęto próbę przeprowadzenia mikrofiltracji soku brzozowego. Trzymiesięczny test przechowalniczy dwunastu próbek prowadzony był w temperaturze pokojowej, zaś badanym parametrem była tzw. gęstość optyczna. Sześć próbek nie było poddanych mikrofiltracji, zaś sześć kolejnych...
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