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Wyszukujesz frazę "Sorensen, S." wg kryterium: Autor

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Quantitative extraction of oil from plant material with supercritical carbon dioxide
    Autorzy:
    Buskov, S.
    Sorensen, H.
    Sorensen, J.C.
    Sorensen, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1373047.pdf
    Data publikacji:
    1997
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    oil seed
    carbon dioxide
    oil
    carotenoid
    chlorophyll
    phospholipid
    extraction
    oilseed rape
    Brassicaceae
    lupin
    oil content
    supercritical fluid extraction
    plant material
    Opis:
    Supercritical fluid extraction (SFE) both with CO2 and CO2/hexane has been developed as a method of analysis for lipids in cruciferous oilseed, rapeseed products and lupin. The SFE procedure used for quantitative determination of oil was compared to traditional Soxhlet oil extraction. The quantitative values obtained with SFE were equal to those obtained with the Soxhlet procedure with respect to oil and fat contents. The oil obtained by SFE had a much lower phosphorus content (below 14 mg/kg compared to 200-530 mg/kg in oil obtained with Soxhlet). When adding hexane to the supercritical fluid in concentrations varying from 50 to 150 mL/L CO2, the solubility of oil in the fluid could be raised up to 600%, from about 30 mg/g without addition of modifier to nearly 200 mg/g when using continuous addition of 150 mL hexane/ L CO2. The phosphorus content was still lower than in oil from Soxhlet (20-64 mg/kg). Therefore, extraction of oil with SFE opens the possibility for selective removal of oil before separate extraction and determination of amphiphilic compounds, e.g. phospholipids. The carotenoid and chlorophyl content in different oils from SFE and Soxhlet were evaluated by UV-VIS determinations. The presence of other amphiphilic compounds was verified and sinapic acid was found to be a quantitatively dominating phenolic compound.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 1997, 06, 3; 115-124
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of commonly used extraction methods for ergosterol in soil samples
    Autorzy:
    Sae-Tun, O.
    Maftukhah, R.
    Noller, C.
    Remlinger, V.I.
    Meyer-Laker, V.
    Sorensen, A.C.T.
    Sustic, D.
    Socianu, S.I.
    Bernardini, L.G.
    Mentler, A.
    Keiblinger, K.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082954.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil
    alkaline extraction
    ergosterol extraction
    glass bead beating
    ultrasonication extraction
    Opis:
    Concerning the contribution of fungi to soil carbon sequestration, various methods have been used to extract ergosterol from soil samples. This study aims to explore the extraction ability and applicability of commonly used methods to extract ergosterol from two contrasting soils. An agricultural soil (chernozem) and a forest soil (podzol) were extracted with different types of cell lysis such as alkaline, glass bead, and ultrasonication methods in association with simple shaking. The ergosterol concentration was measured by high pressure liquid chromatography. Regardless of the method applied, ergosterol yield was higher in podzol than in chernozem. Alkaline extraction resulted in the highest ergosterol concentrations for both soils and miniaturized glass bead extraction produced comparable results in the case of chernozem. In terms of applicability, the non-alkaline methods were simpler to conduct and less demanding of labour, chemical use and glassware and more flexible in terms of the equipment used for mechanical disruption. Despite the limit of the two soil types in the present study, only the simple shaking method was revealed to be dependent on soil type. Based on our results, we recommend the miniaturized glass bead method for agricultural soils, low in organic matter for high throughput. However, not all of the methods described allow for the proper separation of coextracted organic substances from organic-rich soil.
    Źródło:
    International Agrophysics; 2020, 34, 4; 425-432
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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