Autor: Królak, E. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Do water filters improve the quality of potable water?
Autorzy:: Krolak, E.
Raczuk, J.
Biardzka, E.
Powiązania:: https://bibliotekanauki.pl/articles/14057.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: It is common knowledge that household water filtration systems cause water demineralisation. However, the available literature lacks data concerning to what extent filters decrease concentrations of chosen mineral components in water. The aim of the study was to estimate the effect of filters mounted on domestic water intakes on the changes in selected water properties. Water samples filtered in a reverse osmosis system and not enriched by further mineralization were taken for the study. Total hardness, concentrations of magnesium, calcium, chloride and nitrate ions and water pH and conductivity were determined after filtration and compared with the same parameters in water from the waterworks. Randomly chosen water samples used for the study were taken from sites in north-eastern Poland. The analyses were carried out according to current standards. All the studied samples of unfiltered water met the drinking-water quality standards laid down by the Regulation of the Minister of Health. In the study, it was demonstrated that water filters significantly decreased electrolytic conductivity as well as the concentrations of magnesium and calcium ions (decisive for water hardness) and chlorides. The analysed filters also increased water acidity. Drinking filtered water decreases the share of water in the recommended dietary allowance (RDA) for calcium and magnesium and may result in many diseases, which is discussed in the paper. No positive effect of water filters on nitrate concentrations was found. The authors proved that installing household water treatment devices seems unnecessary, especially when water is purchased from municipal waterworks and tested as safe for human consumption.
Źródło:: Journal of Elementology; 2015, 20, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Determination of magnesium, manganese, copper and zinc in infusions of inflorescences and leaves of Solidago canadensis
Autorzy:: Krolak, E.
Bielecka, A.
Strzalek, M.
Powiązania:: https://bibliotekanauki.pl/articles/1192507.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: Canada goldenrod
water extracts
magnesium
trace metals
recommended daily
allowances
Opis:: The Solidago canadensis (Canada goldenrod) species is an invasive plant in Europe and Asia. It grows mainly in anthropogenic environments, including those with a high content of heavy metals in soil. Goldenrod is also a honey plant, and its inflorescences and leaves are used in herbal medicine. The aim of the study was to determine the content of metals: Mg, Mn, Cu and Zn, in inflorescences and leaves of S. canadensis and in water extracts prepared from them. Material for the research was obtained in Poland. The content of the metals was determined by atomic absorption spectrometry. It was found that leaves of S. canadensis contained more Mg and Zn, but less Cu compared with inflorescences. The content of the metals in water extracts was proportional to their content in the raw material, except the content of Mn in leaves. Among the metals studied, the highest extraction of Cu and Mg was noted in infusions of leaves and inflorescences, while Zn achieved the highest extraction in infusions of inflorescences. Mn was extracted to the least extent both in leaves and inflorescence infusions. Infusions of goldenrod leaves provided similar amounts of Mg, Cu and Zn as tea infusions. Infusions of inflorescences provided more Cu and Zn than infusions of chamomile flowers. Considering the use of S. canadensis in phytotherapy, water extracts from goldenrod leaves and inflorescences had a negligible share of the analysed metals (on average about 1% or less) in the recommended daily allowances (RDAs).
Źródło:: Journal of Elementology; 2020, 25, 4; 1489-1498
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Isotopes: caesium-137 and potassium-40 in soils of the powiat of Garwolin [Province of Mazowsze]
Izotopy cezu-137 i potasu-40 w glebach powiatu Garwolin [wojewodztwo mazowieckie]
Autorzy:: Krolak, E
Krupa, B.
Sarnowska, K.
Karwowska, J.
Powiązania:: https://bibliotekanauki.pl/articles/14715.pdf
Data publikacji:: 2008
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: forest soil
Garwolin district
radioactive isotope
chemical property
fallow
137 caesium
soil
potassium-40
field
physical property
Mazovia region
Opis:: In 2005, in the administrative district (powiat) of Garwolin (the Province of Mazowsze), the samples of forest, cropland and fallow land soils were collected from three depths: 0-3 cm, 3-7 cm, 7-12 cm. The litter from the sampling sites located in forests was also collected for studies. In the samples, the contents of isotopes 137Cs and 40K were measured. The highest amount of 137Cs was measured in litter and the upper layer of forest soils; the content of the isotope decreased in deeper layers of the soil. Forest soils were the richest in 137Cs; fallow and cropland soils contained less of this isotope. The content of 40K in forest and fallow land soils did not depend on the depth from which the samples were collected. The highest amount of 40K isotope was found in arable soil, the lowest - in forest soils. The content of 137C in the soils decreased as the soil reaction increased but rose at higher organic carbon content. The content of 40K isotope correlated negatively with the soil reaction and with the content of sand fraction but it correlated positively with the content of clay fraction.
W 2005 r., w glebach powiatu Garwolin (woj. mazowieckie) z trzech poziomów: 0-3 cm, 3-7 cm i 7-12 cm pobierano do badań próbki gleb leśnych oraz nieużytkowanych i użytkowanych rolniczo jako pola uprawne. Dodatkowo w punktach poboru gleb leśnych pobrano do badań ściółkę leśną. W próbkach oznaczono zawartość izotopów 137Cs i 40K. Największą zawartość 137Cs zmierzono w ściółce i powierzchniowej warstwie gleb leśnych, w głąb gleby zawartość izotopu się zmniejszała. Najbardziej wzbogacone w 137Cs były gleby leśne, gleby nieużytkowane rolniczo i pola uprawne zawierały mniejsze ilości tego izotopu. W wierzchnich warstwach gleb leśnych i nieużytków zawartość 40K nie zależała od głębokości poboru prób, natomiast była zależna od sposobu użytkowania gleby. Największe ilości izotopu 40K zmierzono w badanej warstwie gleb ornych, najmniejsze w glebach leśnych. Zawartość 137Cs w badanych glebach zmniejszała się wraz z ze wzrostem odczynu gleby i wzrastała wraz z zawartością węgla organicznego. Zawartość potasu-40 była skorelowana ujemnie z odczynem gleby i zawartością frakcji piasku oraz dodatnio z zawartością frakcji iłu.
Źródło:: Journal of Elementology; 2008, 13, 1
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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