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    Wyświetlanie 1-4 z 4
    Tytuł:
    Preliminary testing of a new bioaerosol sampler developed for the measurements of low and medium concentration levels of airborne bacteria and fungi
    Autorzy:
    Pastuszka, J.S.
    Iwasiewicz, P.
    Brągoszewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/208027.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    aerosols
    bacteria
    fungi
    airborne bacteria
    bioaerosols
    aerozole
    bakterie
    grzyby
    bakterie unoszące się w powietrzu
    bioaerozol
    Opis:
    A new bioaerosol sampler developed for extremely low concentration levels of airborne bacteria and fungi has been described. The results of the pilot study of the prototype of this new sampler are also presented in this paper. During the field studies the concentration levels of bacterial and fungal aerosols were obtained using simultaneously the new sampler and the reference cascade Andersen 6-stage impactor, as well as the Air Ideal sampler. Although only a preliminary study has been carried out, the obtained data indicated that the assumed designing parameters for the new sampler are suitable and guarantee high collection efficiency of this instrument.
    Źródło:
    Environment Protection Engineering; 2013, 39, 1; 129-138
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie zanieczyszczeń powietrza oddziałujących na dzieci w przedszkolu miejskim zlokalizowanym przy drodze o dużym natężeniu ruchu
    Children exposure to air pollutants in nursery school near a major road in urban area
    Autorzy:
    Mainka, A.
    Zajusz-Zubek, E.
    Kozielska, B.
    Brągoszewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/297242.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    powietrze wewnętrzne
    lotne związki organiczne
    pył zawieszony
    bioaerozol
    dwutlenek węgla
    indoor air
    children
    volatile organic compounds
    particulate matter
    bioaerosols
    carbon dioxide
    Opis:
    Przedstawiono wyniki pomiarów stężeń lotnych związków organicznych (LZO), pyłu całkowitego (TSP), frakcji PM10, PM2,5 i PM1 oraz bioaerozoli. Wykonywano również pomiary stężenia CO2 jako wskaźnika skuteczności systemu wentylacji. Pomiary przeprowadzono w okresie grzewczym w dwóch salach opiekuńczych (dzieci w wieku 3-6 lat) oraz na zewnątrz budynku przedszkola położonego w centrum Gliwic (Górny Śląsk) przy drodze o dużym natężeniu ruchu. Wyniki badań wskazują na gorsze warunki co do jakości powietrza wewnątrz. Dla sumy 16 LZO stosunki stężeń wewnątrz i na zewnątrz budynku (I/O) w zależności od sali wahały się od 2 do 5, dla pyłu PM10 sięgały 4, a dla PM2,5 wynosiły około 2. W przypadku bioaerozoli grzybowych średni wskaźnik I/O sięgał 2, natomiast dla aerozoli bakteryjnych przekraczał 8. Jednocześnie ciągłe pomiary stężeń CO2 wykazały dominujący udział niskiej jakości powietrza podczas przebywania dzieci w obu salach przedszkola. Wyniki wskazują na niewystarczającą skuteczność systemu wentylacji, co może negatywnie wpływać na zdrowie i samopoczucie dzieci.
    Children are particularly sensitive to pollutants. The reason for this is that, according to body weight, they breathe in more air than adults. Moreover, due to rapid growth, their immature immune system is more vulnerable to damage than already mature organisms. Children aged 3 to 6 spend large amounts of time indoors, so there is a necessity to evaluate the quality of air in nursery schools. This study investigated the concentrations of volatile organic compounds (VOCs), particulate matter (TSP, PM10, PM2.5 and PM1) and bioaerosols. The concentration of CO2 was monitored as the indicator of ventilation efficiency. The measurements were performed during winter, in two classrooms and outside the nursery school building located in the centre of Gliwice (Upper Silesia), near a road with high traffic. Outdoor concentrations were lower than those indoors for each inspected classroom. For the sum of 16 VOCs, the I/O ratio, depending on classroom, varied from 2 to 5, PM10 reached 4 and for PM2.5, the ratio was about 2. For fungi bioaerosols, the average I/O ratio was about 2, while for bacteria, aerosols exceeded 8. The evaluation of indoor air quality (IAQ) based on CO2 concentration differed from averaging time. Taking into consideration the 24 hour distribution of CO2 concentration in both classrooms dominated the first category of indoor air quality (WEW1), we can expect that children stayed in the environment with high air quality, however, this was not the case. During children’s nursery school attendance for the duration of the working day and throughout five-hour elementary nursery care, the air inside classrooms was mostly 65 to 72% of poor quality (WEW4). In the case of certain pollutants, significant differences in air quality were found between the classrooms of older (I) and younger (II) children. For fungal bioaerosols, the concentration was twice as high in the classroom of younger children (II) compared to the classroom of older children (I). However, in the case of particulate matter, for all studied fractions (TSP, PM10, PM2.5 and PM1), concentrations were about twice as high in classroom I compared to classroom II. This confirms the important role of particulate matter resuspension in classroom I as a result of the intensive activity of older children. Compared to the classroom of older children (I), in the classroom of younger children (II) there were more absorbent materials; hence, we expected higher concentrations of VOCs associated with secondary sources. However, concentrations of VOCs did not confirm this relationship. In the case of bacterial bioaerosols, no significant differences were observed between the classrooms. Continuous measurements of CO2 concentrations showed that in the classroom of older children (I), the air was negligibly worse than in the classroom of younger children (II); this may have been due to the lower efficiency of the natural ventilation system on the first floor of the investigated building.
    Źródło:
    Inżynieria i Ochrona Środowiska; 2015, 18, 1; 119-133
    1505-3695
    2391-7253
    Pojawia się w:
    Inżynieria i Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Polymorphic DNA Sequences in the Identfication of Individuals and its Possible Use in Biometric Systems
    Autorzy:
    Kartasińska, E.
    Brągoszewska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/308733.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    DNA identifcation
    DNA matching
    genetic markers
    genetic profiling
    Opis:
    The article presents the achievements in DNA forensic science practice, the latest developments as well as future trends. The article concerns also other than forensic DNA applications as well as expectations, concerns and obstacles. DNA identification technology unlike other biometric techniques requires the collection of biological material and the identification is not performed in real time. DNA utilized in most of forensic identification, is present almost in every living cell in the body. What is more, each cell of the same body has the same DNA molecule which means that it is possible to compare the DNA sampled from different sources, for example saliva with blood or semen from the same person. Rapid development and reliability of DNA technology contribute to the fact that the analysis of polymorphic DNA sequences constitutes a very important evidence used in the court. The unique properties of DNA and rapid development of DNA analytical devices allow to claim that DNA may assume a more important position amongst biometric data in the future.
    Źródło:
    Journal of Telecommunications and Information Technology; 2015, 2; 11-17
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of salt stress on prenol lipids in the leaves of Tilia 'Euchlora'
    Autorzy:
    Baczewska, A.H.
    Dmuchowski, W.
    Jozwiak, A.
    Gozdowski, D.
    Bragoszewska, P.
    Dabrowski, P.
    Swiezewska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/41706.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    salt stress
    plant stress
    polyprenol
    leaf
    Tilia
    urban tree
    linden zob.lime
    lime
    Opis:
    Soil contamination caused by the NaCl used to de-ice slippery roads in winter is now recognized as one of the major causes of nutrient disorders and death in urban trees. It is believed that polyisoprenoids may have a specific role in the adaptation of plants to adverse conditions and habitats; it is further believed that in the cell, they may exhibit a protective effect in response to biotic and abiotic stress. The aim of this study was to evaluate the effect of salt stress on the content of prenol lipids in the leaves of Crimean linden (Tilia ‘Euchlora’). The Cl content in the slightly damaged (“healthy”) leaves averaged 0.96%, while that in the heavily damaged (“sick”) leaves averaged 2.02%. The leaves of control trees contained on average 0.57% Cl. The Na contents in the healthy and damaged leaves were 208 mg/kg and 1038 mg/kg, respectively, and the Na content in the control areas was 63 mg/kg. A mixture of polyprenols consisting of four compounds, prenol-9, prenol-10, prenol-11 and prenol-12, was identified in the leaves of Crimean linden. This mixture was dominated by prenol-10 (2.16–6.90 mg/g). The polyprenol content was highest in the leaves of “healthy” trees (approximately 13.31 mg/g), was lower in the case of “sick” trees (approximately 9.18 mg/g), and was the lowest in the control trees (mean 4.71 mg/g). No changes were observed in the composition of the mixture of polyprenols under these conditions. The results suggest that polyprenols may affect the accumulation of Cl in leaves. This phenomenon is evidenced by the high content of prenols in the leaves of trees considered “healthy” but growing under conditions of increased soil salinity and the lower content of prenols in the leaves of the “sick” and control trees. It is advisable to further investigate the role of prenol lipids in the leaves of trees subjected to salt stress
    Źródło:
    Dendrobiology; 2014, 72
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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