Autor: Kocjan, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dynamics of wheel-tyre subjected to moving oscillating force
Autorzy:: Bogacz, R.
Kocjan, M.
Kurnik, W.
Powiązania:: https://bibliotekanauki.pl/articles/1986961.pdf
Data publikacji:: 2002
Wydawca:: Politechnika Gdańska
Tematy:: railway vehicles
waves
oscillating force
railway wheels
Opis:: The subject of the paper is analysis of wheel of a moving railway vehicle which is subjected to a moving oscillating force. Rail ring is treated as a beam of small curvature connected to wheel axle with a Winkler foundation. Bernoulli-Euler and Timoshenko beam model is used. Results are gained using Fourier transformation. Space and space-time graphs, showing wave propagation in subcritical and supercritical zones of excitation, concerning resonance of transverse vibrations, are included.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 3; 343-350
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The content of some trace elements in selected medicinal plants collected in the province of Lublin
Zawartość pierwiastków śladowych w wybranych roślinach leczniczych zbieranych na terenie województwa lubelskiego
Autorzy:: Sowa, I.
Wójciak-Kosior, M.
Kocjan, R.
Powiązania:: https://bibliotekanauki.pl/articles/11542233.pdf
Data publikacji:: 2012
Wydawca:: Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Opis:: Nowadays, the increasing tendency to use of herbs and herbal preparation is observed; however, one of the main problem is accumulation of hazardous contaminations in living organisms. In view of these facts, the analysis of toxic components including heavy metals in plants is particular importance. The contents of trace elements: Fe, Zn, Cu, Mn and Ni in medicinal plants collected in the region of Lublin were determined by use of ion chromatography method. The presence of these metals in various amounts was observed in all investigated herbs, however, nickel was found only in Vitis idaeae folium (0.0410 mg g⁻¹) and Polygonii herba (0.0137 mg g⁻¹). Fe and Mn occurred in the highest amount (1.5378 mg g⁻¹ in Polygonii herba and 1.1040 mg g⁻¹ in Vitis idaeae folium, respectively). The content of zinc ranged from 0.2541 mg g⁻¹ (Euphrasiae herba) to 0.0264 mg g⁻¹ (Equiseti herba). The smallest amount of copper was noted in Urticae folium (0.0046 mg g⁻¹) and the highest in Crataegi inflorescentia (0.0155 mg g⁻¹). The extraction of selected ions to water infusion depending on time and temperature was also determined however, only iron passed into water infusion in significant concentration. The highest percentage of extraction was obtained after 10 min. at 95º C.
Obecnie obserwuje się wzrastającą tendencję do stosowania ziół i preparatów ziołowych, jednak jednym z głównych problemów jest kumulacja niebezpiecznych zanieczyszczeń w organizmach żywych. W świetle tych faktów, analiza składników toksycznych, w tym metali ciężkich, w roślinach jest szczególnie ważna. W wybranych roślinach leczniczych pozyskiwanych z regionu Lubelszczyzny oznaczono metodą chromatografii jonowej zawartość pierwiastków śladowych: Fe, Zn, Cu, Mn i Ni. Obecność tych metali zaobserwowano w zróżnicowanych ilościach we wszystkich badanych roślinach z wyjątkiem niklu, który występował tylko w liściu borówki brusznicy (0,041 mg g⁻¹) oraz w zielu rdestu ostrogorzkiego (0,0137 mg g⁻¹). W największych ilościach w ziołach występowały żelazo i mangan, odpowiednio 1,5378 mg g⁻¹ w zielu rdestu ostrogorzkiego i 1,1040 mg g⁻¹ w liściu borówki brusznicy. Zawartość cynku wahała się od 0,2541 mg g⁻¹⁻¹ (ziele świetlika) do 0,0264 mg g⁻¹ (ziele skrzypu polnego). Najmniejsze ilości miedzi zanotowano w liściu pokrzywy (0,0046 mg g⁻¹), a największe w kwiatostanie głogu (0,0155 mg g⁻¹). Badano również ekstrakcję wybranych jonów jednakże tylko żelazo przechodziło do naparu wodnego w znaczącym stężeniu. Najwyższy procent ekstrakcji uzyskano w temperaturze 95º C i po 10 minutach zaparzania.
Źródło:: Acta Scientiarum Polonorum. Hortorum Cultus; 2012, 11, 6; 15-22
1644-0692
Pojawia się w:: Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Time-related variability of the mineral content in birch tree sap
Autorzy:: Bilek, M.
Szwerc, W.
Kuźniar, P.
Stawarczyk, K.
Kocjan, R.
Powiązania:: https://bibliotekanauki.pl/articles/1190127.pdf
Data publikacji:: 2021
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:: tree saps
minerals
time-related variability
food standards
nutritional benefits
Opis:: Minerals are among the most important substances promoting the beneficial effect of tree sap on a human body. However, the composition of tree saps is characterised by high intra- and interspecies variability and it is also known to vary in time even when collected from trees of the same species. The aim of this work was to evaluate the time-related variability of the mineral content in birch tree sap, to prove dependencies between the mineral composition and basic physical parameters of tree saps, and to refer the results obtained in our study to the Polish nutritional standards. Based on the results, it can be concluded that there is no point in time when birch sap invariably achieves superior nutritive values. This is proven by the fact that two of the three tested birch trees had a higher content of minerals at the beginning of sap collection, while the remaining one produced better sap at the end of the experiment. The differences in the mineral composition of tree saps observed during the two-week study raise doubt about the nutritional benefits of their content. For example, one liter of sap collected during two weeks from the three tested birches supplied from 8.49 to 26.34%, 0.9 to 2.80% and 9.17 to 20.23% of the adequate intake of potassium defined in the Nutritional standards for the Polish population (2013). For zinc, the recommended dietary allowance value based on the Nutritional standards for the Polish population (2013) was covered by one liter of sap in the following ranges: from 0 to 2.11%, from 0.85 to 21.50% and from 7.34 to 15.63%. Moreover, it is impossible to estimate the nutritional value of tree saps, understood as the mineral content, from the physical parameters of birch saps. The values of the examined parameters did not correspond reliably to the mineral content. Nonetheless, electrolytic conductivity may reflect more faithfully the nutritional benefits. The higher the EC in the saps from two out of the three birch trees tested, the higher the expected concentration of minerals important for humans, i.e. calcium, zinc and potassium.
Źródło:: Journal of Elementology; 2017, 22, 2; 497-515
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Time-related variability of the mineral content in birch tree sap
Autorzy:: Bilek, M.
Szwerc, W.
Kuźniar, P.
Stawarczyk, K.
Kocjan, R.
Powiązania:: https://bibliotekanauki.pl/articles/961402.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Minerals are among the most important substances promoting the beneficial effect of tree sap on a human body. However, the composition of tree saps is characterised by high intra- and interspecies variability and it is also known to vary in time even when collected from trees of the same species. The aim of this work was to evaluate the time-related variability of the mineral content in birch tree sap, to prove dependencies between the mineral composition and basic physical parameters of tree saps, and to refer the results obtained in our study to the Polish nutritional standards. Based on the results, it can be concluded that there is no point in time when birch sap invariably achieves superior nutritive values. This is proven by the fact that two of the three tested birch trees had a higher content of minerals at the beginning of sap collection, while the remaining one produced better sap at the end of the experiment. The differences in the mineral composition of tree saps observed during the two-week study raise doubt about the nutritional benefits of their content. For example, one liter of sap collected during two weeks from the three tested birches supplied from 8.49 to 26.34%, 0.9 to 2.80% and 9.17 to 20.23% of the adequate intake of potassium defined in the Nutritional standards for the Polish population (2013). For zinc, the recommended dietary allowance value based on the Nutritional standards for the Polish population (2013) was covered by one liter of sap in the following ranges: from 0 to 2.11%, from 0.85 to 21.50% and from 7.34 to 15.63%. Moreover, it is impossible to estimate the nutritional value of tree saps, understood as the mineral content, from the physical parameters of birch saps. The values of the examined parameters did not correspond reliably to the mineral content. Nonetheless, electrolytic conductivity may reflect more faithfully the nutritional benefits. The higher the EC in the saps from two out of the three birch trees tested, the higher the expected concentration of minerals important for humans, i.e. calcium, zinc and potassium.
Źródło:: Journal of Elementology; 2017, 22, 2
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Effect of various strontium concentrations on its uptake and the content of isoflavonesin soybean sprouts
Autorzy:: Wojciak-Kosior, M.
Dresler, S.
Sowa, I.
Luc, K.
Staniak, M.
Latalski, M.
Zapala-Kielbowicz, K.
Kocjan, R.
Powiązania:: https://bibliotekanauki.pl/articles/2117832.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: glycine max (l.) Merr.
isoflavones
soy
sprouts
strontium
Opis:: Metal ions can modify plant metabolism and change the level of biologically active components. In the present study, the impact of short-term exposure to strontium on the accumulation of the metal as well as the content of isoflavones in soybean sprouts was investigated. The seeds were germinated in hydroponics with 0, 1, 1.5, 2.5, 5.0, or 10.0 mM of Sr for 72 hours. The content of strontium was assessed using flame atomic absorption spectrometry and the amount of isoflavones was determined with high performance liquid chromatography. dose-dependent accumulation of Sr and a linear correlation between the Sr concentration in the growth medium and the content of the element in the plant samples were observed. The largest changes in the isoflavone content, compared to the control, were noted in soy sprouts germinated in the presence of 5 and 10 mM of strontium. daidzin, genistin, malonyldaidzin, and malonylgenistin were the dominant isoflavones and their content increased by approx. 28, 44, 34, and 47%, respectively, compared to the control. low amounts of aglycones were found; moreover, their content decreased by ca. 19–30%. Our research can be important for obtaining a natural product enhanced with strontium and isoflavones, which contribute to prevention of osteoporosis associated with endog- enous oestrogen deficits
Źródło:: Acta Biologica Cracoviensia. Series Botanica; 2019, 61, 2; 7-12
0001-5296
Pojawia się w:: Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:: Biblioteka Nauki

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