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    Wyświetlanie 1-4 z 4
    Tytuł:
    Wstępna ocena spożycia błonnika pokarmowego przez uczennice szkół średnich w Szczecinie
    Preliminary estimation of the dietary fiber intake among adolescent girls from Szczecin
    Autorzy:
    Seidler, T.
    Mierzwa, M.
    Woźniak, M.
    Ilczuk, M.
    Marchlik, M.
    Masternak, D.
    Misiarz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/82570.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    blonnik pokarmowy
    dziewczeta
    mlodziez szkolna
    spozycie
    szkoly srednie
    uczniowie
    zywienie czlowieka
    zywienie racjonalne
    Opis:
    The aim of the research was to determine level and sources of dietary fiber (DF) in daily nutrition intake among teenage girls (16–18 age) from Szczecin. According to recommended level of DF, determined average level was much lower and comprised of 45.6% of daily requirements. Source and amount of DF in composite ration were as follows: cereal products 38% and vegetables with fruits 38%. Moreover, content of energy, proteins, carbohydrate, fat and cholesterol were additionally determined in order to compare with dietary guidelines. All stated above elements were present in insufficient quantity and did not correspond to current nutritional guidelines (mean percentage ranged form 54.2 to 80.4%).
    Źródło:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica; 2009, 09
    2081-1284
    Pojawia się w:
    Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Content of PAHs, activities of γ-radionuclides and ecotoxicological assessment in biochars
    Autorzy:
    Gondek, K.
    Mierzwa-Hersztek, M.
    Smreczak, B.
    Baran, A.
    Kopeć, M.
    Mróz, T.
    Janowski, P.
    Bajda, T.
    Tomczyk, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778621.pdf
    Data publikacji:
    2016
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    biochar
    sewage sludge
    PAHs
    γ-radionuclides
    Vibrio fischeri
    Opis:
    The aim of this research was to determine the effect of thermal conversion temperature and plant material addition to sewage sludge on the PAHs content and the activity of selected γ-radionuclides in biochars, and to conduct an ecotoxicological assessment. The pyrolysis of the mixtures of sewage sludge and plant materials at 300°C and such temperature caused an increase in the contents of 2- and 3-ring hydrocarbons. During the pyrolysis of organic materials at 600°C, the amount of the following compounds was reduced in biochars: benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3c,d]pyrene, dibenzo[a,h]anthracene, and benzo[g,h,i]perylene. Among γ-radioisotopes of the elements, natural radiogenic isotopes were dominant. 137Cs was the only artificial radioactive isotope. The pyrolysis of the mixtures of municipal sewage sludge and plant materials revealed that isotope  40K had the highest radioactive activity. In the case of other analysed nuclides, activities of  212Pb,  214Pb,  214Bi, and  137Cs were determined after the sample pyrolysis. The extracts from the mixtures of sewage sludge and plant materials were non-toxic to Vibrio fischeri.
    Źródło:
    Polish Journal of Chemical Technology; 2016, 18, 4; 27-35
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Properties and activity of the cobalt catalysts for NH3 &enspsynthesis obtained by co-precipitation – the effect of lanthanum addition
    Autorzy:
    Zybert, M.
    Karasińska, M.
    Truszkiewicz, E.
    Mierzwa, B.
    Raróg-Pilecka, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778653.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ammonia synthesis
    cobalt catalyst
    promoter
    lanthanum
    coprecipitation
    Opis:
    In modern research on catalysts for NH3&enspsynthesis a lot of attention is paid to cobalt. In this work the new catalytic systems based on cobalt are presented. Unsupported cobalt catalysts singly promoted (La or Ba) and doubly promoted (La and Ba) were prepared and tested in NH3&enspsynthesis reaction under commercial synthesis conditions. Characterization studies revealed that lanthanum plays a role of a structural promoter, which improves the surface of catalyst precursors and prevents from sintering during calcination. However, lanthanum has a negative effect on the reduction of cobalt oxide, but the addition of barium promoter (Co/La/Ba catalyst) diminishes the negative impact of La. The co-promotion of cobalt with lanthanum and barium results in the increasing of the active phase surface and improvement of its activity in NH3&enspsynthesis.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 1; 138-143
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cobalt-lanthanum catalyst precursors for ammonia synthesis: determination of calcination temperature and storage conditions
    Autorzy:
    Zybert, M.
    Tarka, A.
    Mierzwa, B.
    Raróg-Pilecka, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778044.pdf
    Data publikacji:
    2017
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ammonia synthesis
    catalyst precursor
    cobalt
    lanthanum
    thermal analysis
    Opis:
    A thermal decomposition of a cobalt-lanthanum catalyst precursor containing a mixture of cobalt and lanthanum compounds obtained by co-precipitation were studied using thermal analysis coupled with mass spectrometry (TG-MS). Studies revealed that the calcination in air at 500°C is sufficient to transform the obtained cobalt precipitate into Co3 O4 , but it leads to only partial decomposition of lanthanum precipitate. In order to obtain Co/La catalyst precursor containing La2 O3  the calcination in air at the temperature about 800°C is required. However, it is unfavorable from the point of view of textural properties of the catalyst precursor. A strong effect of storage conditions on the phase composition of the studied cobalt-lanthanum catalyst precursor, caused by the formation of lanthanum hydroxide and lanthanum carbonates from La2 O3  when contacting with air, was observed.
    Źródło:
    Polish Journal of Chemical Technology; 2017, 19, 2; 61-66
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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