Autor: Filon, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of trace element content in hair of autistic children
Autorzy:: Fiłon, J.
Ustymowicz-Farbiszewska, J.
Karczewski, J.
Żendzian-Piotrowska, M.
Powiązania:: https://bibliotekanauki.pl/articles/962642.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Determination of the pathogenesis and treatment of autism spectrum disorders is one of the major challenges for modern scientists. The main pathogenic factors implicated in these disorders are epigenetic changes caused by environmental factors, which include toxic metals (Cd, Pb, Hg, Mn, Al and As). Also, the nervous system may be affected by the deficiency of microand macroelements (e.g. Zn and Mg). The aim of the work was to analyze the content of particular trace elements in the hair of autistic children. The study material comprised samples of hair collected from both autistic children (study group) and children chosen randomly from general population (control group). The concentrations of Mg, Zn, Cd and Mn were measured by electron scanning microscopy on a Hitachi TM-3000 apparatus, and by X-ray EDS microanalysis. The content of trace elements in hair, mutual interactions between them and their impact on the development of autism in children were evaluated. The results were statistically analyzed with the use of Statistica PL 12.5 software, including the Mann-Whitney U test, Wilcoxon matched-pair test and R-Spearman correlation. According to the study, children diagnosed with autism suffer from both Zn deficiency and toxic metal burden (Cd and Mn). The changes observed in Mg level were statistically insignificant. These abnormalities, as an environmental factor, may play a pivotal role in the pathogenesis of this disease.
Źródło:: Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Contamination of cereal products with lead and cadmium as a risk factor to health of the population in the province of Podlasie (wojewodztwo podlaskie)
Zanieczyszczenie produktów zbożowych Pb i Cd jako czynnik ryzyka zdrowotnego ludności województwa podlaskiego
Autorzy:: Filon, J.
Ustymowicz-Farbiszewska, J.
Gorski, J.
Karczewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/16042.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Lead and cadmium pose a serious threat to human health, hence their content in food products is regulated by the EU standards, also binding in Poland. Food contamination with these metals is an etiological factor of civilization diseases. In order to prevent such disorders, it is extremely important to assess the degree of environmental pollution with Pb and Cd, reflected by the level of these metals in food products. Determination of Pb and Cd in food products demonstrates exposure to the toxic effect of these metals and enables evaluation of the threat to human health in a given population. The aim of this study has been to estimate the health threat to the population of the Province of Podlasie ( województwo podlaskie ) due to Pb and Cd contamination of cereal products. The following foodstuffs were analyzed: flour, groats, bread, pasta, rice, bran and soya products. They were collected in 13 administrative districts of the Province of Podlasie while monitoring health quality of food products. Pb and Cd concentrations were determined with the AAS method. The highest Cd level was noted in pastas (0.058±0.0330 mg kg ?1 ) and the highest Pb level was determined in cuscus (0.120±0.0899 mg kg ?1 ). The lowest average Pb concentration was found in groats (0.042±0.0306 mg kg ?1 ) and Cd was the lowest in wholemeal bread (0.016±0.0106 mg kg ?1 ). The average concentrations of Pb and Cd in cereal products did not exceed the permissible limits established by the Minister of Health. The permissible level of Pb was not surpassed until the level of the 90 th percentyl (in couscous and soya products). An average intake of Pb and Cd was within the tolerated amount, corresponding to 10% PTWI and 12% PTWI, respectively. Thus, no threat to the health of the population in Podlasie was detected.
Źródło:: Journal of Elementology; 2013, 18, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Lead content in cereal products as a population health threat marker: a case study in the province of Podlasie
Zawartość ołowiu w produktach zbożowych jako marker narażenia zdrowotnego populacji na przykładzie województwa podlaskiego
Autorzy:: Filon, J.
Ustymowicz-Farbiszewska, J.
Karczewski, J.
Powiązania:: https://bibliotekanauki.pl/articles/15461.pdf
Data publikacji:: 2013
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:: Heavy metals, which are considered basic industrial and environmental pollutants, pose a threat to the human health if found in food products even in trace amounts. Lead may cause such conditions as functional disorders of the kidneys, liver or the circulatory system. It can also impede the biosynthesis of heme and cause disturbances in the metabo- lism of vitamin D and the following microelements: Fe, Cu, Zn Se and Ca. The aim of the study was to assess the health threat and estimate risks from the presence of Pb in cereal products available in retail shops in the Province of Podlasie. The material consisted of samples of cereal products (flour, groats, bakery products, pasta and rice) taken at random from retail shops in Podlasie in 2004-2005 and 2010-2011. The lead concentration was estimated by using the atomic absorption spectrometry method (AAS). The content of Pb was analyzed depending on a product type and sampling period; the health threat was assessed with reference to the current Polish requirements. The results were statistically analyzed using Statistica 7.1 software, Duncan?s test and Wilcoxon test. The results revealed that the average content of Pb in the examined cereal products did not exceed the norms. During the analyzed period, a decrease in the Pb concentration in cereals was found. This may indicate an improvement in the quality of the environ- ment, which can be measured by the content of Pb in cereal products. At the same time, owing to the significant role of cereal products in human nutrition, the lead content may also serve as a marker of health exposure.
Źródło:: Journal of Elementology; 2013, 18, 3
1644-2296
Pojawia się w:: Journal of Elementology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Poliolefiny napełniane odpadami sztywnej pianki poliuretanowej i kompatybilizowane metodą pulweryzacji ścinaniem w stanie stałym podczas wytłaczania
Polyolefins filled with waste rigid polyurethane foam and compatibilized by solid-state shear pulverization during extrusion
Autorzy:: Steller, R.
Kędziora, G.
Mitchener, G.
Fiłon, K.
Kołbuc, R.
Lenart, K.
Śliwiński, J.
Powiązania:: https://bibliotekanauki.pl/articles/947550.pdf
Data publikacji:: 2017
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Chemii Przemysłowej
Tematy:: poliolefiny
odpady sztywnej pianki poliuretanowej
pulweryzacja ścinaniem w stanie stałym
właściwości reologiczne
polyolefins
rigid polyurethane foam waste
solid-state shear pulverization
rheological properties
Opis:: Polietylen małej gęstości (PE-LD) i polietylen dużej gęstości (PE-HD) oraz ich mieszaninę w stosunku 1:1, a także polipropylen (PP) napełniono odpadami rozdrobnionej sztywnej pianki poliuretanowo-poliizocyjanurowej (PUR-PIR) w ilości do 40 % mas. Składniki kompozycji homogenizowano za pomocą dwuwalcarki, a następnie, po zgranulowaniu, poddawano dodatkowej homogenizacji metodą pulweryzacji ścinaniem w stanie stałym (S3P – solid-state shear pulverization) podczas wytłaczania. Próbki do badań porównawczych formowano metodą wtryskiwania. Oceniano zmiany budowy chemicznej (metodą FT-IR), właściwości mechanicznych (próba rozciągania, udarność), właściwości reologicznych (MFR) oraz termicznych (temperatura mięknienia) badanych kompozycji. Stwierdzono, że pulweryzacja wpływa korzystnie na właściwości otrzymanych układów.
Low density polyethylene (PE-LD), high density polyethylene (PE-HD), PE-LD/PE-HD blend at aratio of 1:1, and polypropylene (PP) were filled with finely-ground waste of rigid polyurethane-polyisocyanurate (PUR-PIR) foam in an amount up to 40 wt %. The components were homogenized with two-roll-mill and then, after granulation, subjected to additional homogenization using the method of solid-state shear pulverization (so-called S3P process) during extrusion. The specimens for comparative studies were obtained by injection molding. The changes in chemical structure (using FT-IR spectroscopy), mechanical properties (tensile and impact tests), rheological properties (MFR, rotational rheometry), and thermal properties (Vicat temperature) of the investigated compositions were determined. It was found that the pulverization has afavorable effect on the characteristics of the examined systems, although the improvement is not significant and clearly depends on the type of matrix polymer and foam content.
Źródło:: Polimery; 2017, 62, 3; s. 181-186
0032-2725
Pojawia się w:: Polimery
Dostawca treści:: Biblioteka Nauki

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