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    Tytuł:
    Polycyclic aromatic hydrocarbons in hard coals from Poland
    Autorzy:
    Bojakowska, I.
    Sokołowska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059323.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    hard coal
    polycyclic aromatic hydrocarbons
    Opis:
    Concentrations of seventeen unsubstituted polycyclic aromatic hydrocarbons (PAHs) have been determined in hard coal samples from the Carboniferous Upper Silesian, Lower Silesian and Lublin Coal Basins. Among the investigated coals the highest average content of PAHs was determined for the Lower Silesian coals - 6.619 ppm, whereas the means for the Upper Silesian and Lublin coals were 4.11 and 4.319 ppm respectively. Hard coals from the Lublin Coal Basin have relatively high contents of the 5- and 6-cyclic hydrocarbons and lower contents of the 3-cyclic hydrocarbons (0.180 ppm) than coals from the Lower Silesian and Upper Silesian Coal Basins, which contain 2.542 and 1.437 ppm respectively. Within the Upper Silesian Coal Basin there are differences in the PAH "profiles": the coals from the eastern part of the basin have higher contents of the 5- and 6-cyclic aromatic hydrocarbons and lower contents of the 3-cyclic hydrocarbons than those from the western part of the basin.
    Źródło:
    Geological Quarterly; 2001, 45, 1; 87-92
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polycyclic aromatic hydrocarbons in crude oils from Poland
    Autorzy:
    Bojakowska, I.
    Sokołowska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059329.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    polycyclic aromatic hydrocarbons
    crude oils
    Opis:
    The content of 17 polycyclic aromatic hydrocarbons (PAHs) in oil samples derived from all three oil-bearing regions of Poland, i.e. from the Carpathians, the Carpathian Foredeep and the Polish Lowlands (the Fore-Sudetic-Wielkopolska, the Western Pomeranian and the Peribaltic areas), were determined. The concentrations of PAHs determined in these crude oils varied from 22.85 to 332.45 ppm. The average content of PAHs in crude oils from the Carpathians and the Carpathian Foredeep (191.18 ppm) was several times higher than that in crude oils from the Polish Lowlands (44.70 ppm); there was throughout, though, a relatively small variability in the content of perylene, varying from 0.50 to 0.80 ppm. Of PAH compounds determined, the largest share was occupied by 3-cyclic hydrocarbons (an average of 72%) and 4-cyclic (about 24%), whereas the content of 5- and 6-cyclic hydrocarbons did not exceed 3%. Phenanthrene and fluorene were prevailing PAH compounds. The diverse PAH composition in oil samples from the Polish Lowlands compared to those from the Carpathians and the Carpathian Foredeep seems to have resulted more from the composition of original organic matter than from the course of geochemical and biochemical processes (which occur during biomass decay) and the subsequent migration of these compounds in rock formations.
    Źródło:
    Geological Quarterly; 2001, 45, 1; 81-86
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Polycyclic aromatic hydrocarbons in brown coals from Poland
    Autorzy:
    Bojakowska, I.
    Sokołowska, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059332.pdf
    Data publikacji:
    2001
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    brown coal
    polycyclic aromatic hydrocarbons
    Opis:
    Concentrations of seventeen unsubstituted polycyclic aromatic hydrocarbons (PAHs) have been determined in brown coal samples from several deposits in Poland. Content of the total determined PAHs ranges from 0.247 to 4.894 ppm, with an average value of 1.542 ppm. Unsubstituted PAHs concentrations in brown coals from tectonic depression deposits are several times higher than in brown coals from lensoid deposits. Among the investigated PAHs, perylene is the most abundant, exceeding other determined PAHs more than tenfold. Samples taken from coal lensoid deposits contain more chrysene and benzo(a)anthracene than samples from tectonic depressions, which have more acenaphthylene, fluoranthene and pyrene.
    Źródło:
    Geological Quarterly; 2001, 45, 1; 93-98
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of secondary transformation index of peat-muck soils on the content of selected metals
    Wpływ stopnia wtórnych przeobrażeń gleb torfowo-murszowych na zawartość wybranych metali
    Autorzy:
    Boguta, P.
    Sokołowska, Z.
    Bowanko, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/36848.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    secondary transformation
    peat-muck soil
    metal content
    metal ion
    Biebrza River
    Opis:
    The main aim of the study was the determination of the content of selected metal ions in soils originating from Polesie Lubelskie and Biebrza River Region, as well as an attempt at relating the results obtained to the degree of secondary transformation of studied soils. All the soils belonged to peat-muck soils and differed from each other in their secondary transformation index. The study included analyses of the content of potassium, calcium, magnesium and manganese with the use of absorption atomic spectroscopy for the determination of the concentration of those metals. At the next stage of the study, relationships between the secondary transformation index of peat-muck soils and selected metal contents were examined. Weak linear relationships were found for the secondary transformation index and the content of calcium, manganese and potassium. A more complex situation was observed for the relation of magnesium ions. The lack of a straight-line trend could be explained in this case by the effect of chemical processes occurring in particular classes of mucks transformation on magnesium ion binding.
    Głównym celem pracy było zbadanie zawartości wybranych metali w glebach torfowo-murszowych pochodzących z Polesia Lubelskiego i Doliny Biebrzy, jak również próba odniesienia uzyskanych wyników do stopnia przeobrażeń wtórnych poszczególnych gleb. Badania obejmowały analizy potasu, wapnia, magnezu i manganu. W celu oznaczenia wyżej wymienionych pierwiastków wykorzystano metodę absorpcyjnej spektrometrii atomowej W kolejnym etapie badań wyznaczone zostały zależności pomiędzy zmierzonymi zawartościami metali, a stopniem przeobrażeń wtórnych gleb, mierzonym jako współczynnik pojemności wodnej. Wyniki wykazały istnienie słabych liniowych korelacji pomiędzy jonami potasu, wapnia i manganu, a stopniem przeobrażeń wtórnych. Bardziej złożoną zależność zaobserwowano dla jonów magnezu. Brak prostoliniowego trendu mógł być w tym przypadku tłumaczony silnym wpływem na wiązanie jonów magnezu, chemicznych zmian występujących w poszczególnych klasach wtórnej transformacji utworu glebowego.
    Źródło:
    Acta Agrophysica; 2011, 18, 2[193]
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Concentration of some amino acids in blood plasma and study results of lumbosacral bone system computer tomography
    Autorzy:
    Wójcik, G.
    Sokołowska, B.
    Borzecki, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2052367.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
    Tematy:
    amino acids
    chromatography
    computed tomography
    lumbar spine
    Opis:
    Introduction and objective: Back pain are the most common ailment within the human locomotor system. Because of their prevalence, they were classified as diseases of civilization. The aim of the study was to attempt to assess the concentration of selected amino acids in plasma and correlating the results of laboratory tests with the occurrence of backaches. Material and method: The study group included 188 patients presenting for CT scan administering as the cause of their symptoms low back pains. All of these patients gave the blood samples from which the concentration of free amino acids was estimated by ion exchange chromatography using an automated amino acid analyzer AAA 400 from INGOS Praha. The control group consisted of patients who underwent testing using computed tomography and there were no primary or secondary changes associated with degeneration in the lumbar spine. Results: Patients on the basis of research carried out by computed tomography were divided into five groups according to disease entity. Analyzing the average concentration of essential amino acids in the blood plasma of patients of each group, it was found that it is higher in the case of lysine for each considered disease entity. The average concentration of methionine in all disease entities does not deviate from the average values in the control group. Analysis of the average concentration of selected essential amino acids revealed that in the case presented disorders underwent their level of variation. Average concentrations of selected amino acids have proven to be very similar in both groups. Slightly higher values proved to be in the control group for proline and lysine. Conclusions: The concentration of amino acids varies with the severity of degenerative changes in the connections as well as in interbody joints. The highest increase in the concentrations of all tested amino acids are present in root bands. Decrease in the concentrations of all tested amino acids appears in cancer.
    Źródło:
    Health Problems of Civilization; 2015, 09, 3; 5-11
    2353-6942
    2354-0265
    Pojawia się w:
    Health Problems of Civilization
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specific surface area of Lublin Polesie mucks determined from water vapour and nitrogen adsorption data
    Autorzy:
    Sokolowska, Z.
    Matyka-Sarzynska, D.
    Bowanko, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/26505.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    Lublin Polesie region
    nitrogen
    water vapour
    surface area
    muck
    adsorption
    Źródło:
    International Agrophysics; 2004, 18, 4
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Seasonal variation of some soil structure indicators
    Autorzy:
    Korsunskaya, L.P.
    Sokolowska, Z.
    Hajnos, M.
    Jozefaciuk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/24188.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil structure
    polysaccharide
    indicator
    grey forest soil
    aggregation
    root weight
    seasonal change
    soil aggregate
    water retention
    Źródło:
    International Agrophysics; 1995, 09, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characteristics of rapeseed oil cake using nitrogen adsorption
    Autorzy:
    Sokolowska, Z.
    Bowanko, G.
    Boguta, P.
    Tys, J.
    Skiba, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/24307.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Opis:
    Adsorption of nitrogen on the rapeseed oil cake and rapeseed oil cake with wheat meal extrudates was investigated. The results are presented as adsorption-desorption isotherms. The Brunauer-Emmet and Teller equation was used to analyse the experimental sorption data. To obtain estimates of the surface area and surface fractal dimension, the sorption isotherms were analyzed using the Brunauer-Emmet and Teller and Frenkel-Halsey-Hill equations. Mesopore analysis was carried out using the Dollimore and Heal method. The properties and surface characteristic of rapeseed oil cake extrudates are related to different basic properties of particular samples and duration of the extrusion process. Extrusion conditions lead to essential differences in particular products. For all kinds of rapeseed oil cakes the amount of adsorbed nitrogen was different, but for the rapeseed oil cake extrudates a large amount of adsorbed nitrogenwas observed. The average surface area of the rapeseed oil cake extrudates was about 6.5-7.0 m2 g-1, whereas it was equal to about 4.0-6.0 m2 g-1 for rapeseed oil cake with the wheat meal extrudates. In the case of non-extruded rapeseed oil cake and wheat meal, the dominant group included ca. 2 and 5 nmpores. The values of surface fractal dimension suggested that the surface of the extrudates was more homogenous than that of the raw material. Duration of the extrusion process to 80 s resulted in a decrease in the specific surface area, surface fractal dimension, and porosity of the extrudates.
    Źródło:
    International Agrophysics; 2013, 27, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physicochemical reclamation of saline soils using coal powder
    Autorzy:
    Raychev, T.
    Popandova, S.
    Jozefaciuk, G.
    Hajnos, M.
    Sokolowska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/24330.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    coal powder
    soil
    pot experiment
    saline soil
    reclamation
    Źródło:
    International Agrophysics; 2001, 15, 1
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of three techniques to assess surface heterogeneity of solids in soils
    Autorzy:
    Polubesova, T.A.
    Pachepsky, Y.A.
    Hajnos, M.
    Jozefaciuk, G.
    Sokolowska, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/25170.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil degradation
    surface adsorption
    surface heterogeneity
    energy distribution
    heterogeneity
    Źródło:
    International Agrophysics; 1997, 11, 3
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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