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    Wyświetlanie 1-4 z 4
    Tytuł:
    Indoor allergens in settled dust from kindergartens in city of Łódź, Poland
    Autorzy:
    Cyprowski, Marcin
    Buczyńska, Alina
    Szadkowska-Stańczyk, Irena
    Powiązania:
    https://bibliotekanauki.pl/articles/2179064.pdf
    Data publikacji:
    2013-12-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    indoor allergens
    settled dust
    environmental exposure
    allergen transportation
    kindergartens
    children
    Opis:
    Objectives: The main objective of the study was to determine the levels of house dust mite (Der p1), dog (Can f1), cat (Fel d1) and cockroach (Bla g2) allergens in kindergartens localized in an urban agglomeration. Material and Methods: A quantitative analysis of allergens was carried out in settled dust samples collected by vacuuming the floor surface in three kindergartens (N = 84) and children's clothing (N = 36). The samples were collected in springsummer and autumn-winter periods as well as at the beginning and end of the week. The allergen dust concentration was determined by enzyme-linked immunoenzymatic assay (ELISA). Results: The mean geometric concentrations (±geometric standard deviations) of allergens Der p1, Can f1, Fel d1 and Bla g2 determined in kindergartens were: 0.02±3.21 μg/g of dust; 0.97±4.49 μg/g of dust; 0.30±4.43 μg/g of dust and 0.01±3.08 μg/g of dust, respectively. Younger classrooms (children aged from 3 to 4 years) were characterized by almost twice higher mean concentration of allergen Fel d1, as compared to older classrooms (children aged from 5 to 6 years) (p < 0.05). A significant impact of seasonality on the level of dog allergen Can f1 was found (p < 0.05). No significant weekly variation was found in average concentrations of the allergens. Children who had a dog and/or cat at home were characterized by high concentrations of allergens Can f1 and Fel d1 on their clothes (59.2±5.39 μg Can f1/g of dust; 3.63±1.47 μg Fel d1/g of dust), significantly higher than concentrations of allergens in children who did not have any pets (p < 0.001). Conclusions: Special attention should be paid to keeping the kindergarten rooms tidy and clean and to an appropriate choice of furnishings and fittings which would prevent the proliferation of the house dust mite and accumulation of allergens.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 6; 890-899
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effect of air quality on sleep and cognitive performance in school children aged 10–12 years: a double-blinded, placebo-controlled, crossover trial
    Autorzy:
    Klausen, Frida B.
    Amidi, Ali
    Kjærgaard, Søren K.
    Schlünssen, Vivi
    Ravn, Peter
    Østergaard, Kirsten
    Gutzke, Vibeke H.
    Glasius, Marianne
    Grønborg, Therese K.
    Hansen, Stefan N.
    Zachariae, Robert
    Wargocki, Pawel
    Sigsgaard, Torben
    Powiązania:
    https://bibliotekanauki.pl/articles/2203016.pdf
    Data publikacji:
    2023-05-23
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    sleep quality
    cognition
    indoor air
    CO2 exposure
    school children
    RCT study
    Opis:
    Objectives To investigate the effect of CO₂ during sleep on next-morning cognitive performance in young schoolchildren, the authors performed a double-blind fully balanced crossover placebo-controlled study. Material and Methods The authors included 36 children aged 10–12 years in the climate chamber. The children slept at 21°C in 6 groups each at 3 different conditions separated by 7 days in a random order. Conditions were as follows: high ventilation with CO₂ at 700 ppm, high ventilation with added pure CO₂ at 2000–3000 ppm, and reduced ventilation with CO₂ at 2–3000 ppm and bioeffluents. Children were subjected to a digital cognitive test battery (CANTAB) in the evening prior to sleep and on the next morning after breakfast. Sleep quality was monitored with wrist actigraphs. Results There were no significant exposure effects on cognitive performance. Sleep efficiency was significantly lower at high ventilation with CO₂ at 700 ppm which is considered to be a chance effect. No other effects were seen, and no relation between air quality during sleep and next-morning cognitive performance was observed in the children emitting an estimated 10 l CO₂ /h per child. Conclusions No effect of CO₂ during sleep was found on next day cognition. The children were awakened in the morning, and spent from 45–70 min in well-ventilated rooms before they were tested. Hence, it cannot be precluded that the children have benefitted from the good indoor air quality conditions before and during the testing period. The slightly better sleep efficiency during high CO₂ concentrations might be a chance finding. Hence, replication is needed in actual bedrooms controlling for other external factors before any generalizations can be made.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2023, 36, 2; 177-191
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of exposure to fungi in the heavily contaminated work environment (a solid waste sorting plant) based on the ergosterol analysis
    Autorzy:
    Kozajda, Anna I.
    Jeżak, Karolina
    Sowiak, Małgorzata
    Gutarowska, Beata
    Szadkowska-Stańczyk, Irena
    Powiązania:
    https://bibliotekanauki.pl/articles/2177184.pdf
    Data publikacji:
    2015-07-17
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational exposure
    bioaerosols
    sterols
    solid waste management plant
    ergosterol
    indoor air pollution
    Opis:
    Objectives This paper reports on the results of the study aimed at application of ergosterol as an quantitative indicator of fungal bioaerosol present in the indoor air in occupational environment heavily contaminated with organic dust as well as its comparison with the culturable method. Material and Methods The study was conducted in the indoor solid waste sorting plant. Using Andersen impactor adapted to 1 plate at the flow rate of 30 l/min, indoor air was sampled in the workers’ breathing zone. Ergosterol was sampled using gelatinous filter (1000 l of air) and then analyzed by means of the spectrophotometric method. Fungi were sampled on malt extract agar (MEA) medium (3 replications: 2 l, 7.5 l, 15 l of air) and analyzed by means of the culturable method. Based on ergosterol analyzes, concentration of fungi was calculated. Results were given as the range assuming min. as 5.1 pg ergosterol/spore and max as 1.7 pg ergosterol/spore. Results The average concentrations of ergosterol in a working room (arithmetic mean (AM), standard deviation (SD); minimum–maximum (min.–max)) were, respectively: 2.16, 0.72; 0.85–2.92 μg/m³; fungi calculated based on ergosterol – 424.1×10³–1272.4×10³, 140.1×10³– 420.4×10³, 167×10³–1716.5×10³ CFU/m³, and culturable fungi – 13×10³, 9.7×10³, 1.9×10³–34×10³ CFU/m³). It was revealed that concentrations of calculated fungi were even 2 orders of magnitude higher than culturable fungi. Conclusions The quantitative assessment of moldiness by means of ergosterol measurement seems to be a reliable indicator for environments heavily contaminated with organic dust, where viable and non-viable fungi are present in high proportions. Based on that result, more restrictive (as compared to a similar assessment carried out by means of the culturable method) hygienic recommendations, especially those related to the use of preventive measures protecting the employees’ respiratory tract, should have been undertaken.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2015, 28, 5; 813-821
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Przydatność optycznego miernika do oceny narażenia ludzi na drobny pył zawarty w powietrzu pomieszczeń
    The usefulness of an optical monitor for the assessment of human exposure to fine dust in indoor air
    Autorzy:
    Kowalska, Małgorzata
    Mainka, Anna
    Mucha, Walter
    Powiązania:
    https://bibliotekanauki.pl/articles/2164011.pdf
    Data publikacji:
    2019-04-19
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    zdrowie publiczne
    kalibracja
    drobny pył PM2,5
    powietrze wewnętrzne
    narażenie indywidualne
    pomiar optyczny
    public health
    calibration
    PM2.5 fine dust
    indoor air
    personal exposure
    optical measurement
    Opis:
    Wstęp Istotną kwestią w ocenie ryzyka zdrowotnego jest pomiar indywidualnego narażenia, także dla zanieczyszczenia powietrza atmosferycznego drobnym pyłem. Takie możliwości dają stosunkowo proste w obsłudze mierniki optyczne. Celem pracy była ocena możliwości wykorzystywania optycznego miernika AM520 do pomiaru indywidualnego narażenia ludzi na drobny pył PM2,5 i PM10, zawarty w pomieszczeniach zamkniętych, poprzez ustalenie współczynnika kalibracji i ocenę zgodności pomiaru z metodą referencyjną. Materiał i metody W ramach badań wykonano pomiary stężeń pyłu PM2,5 i PM10 w pomieszczeniach (3 lokalizacje w powiecie gliwickim, marzec−maj 2017 r.) z wykorzystaniem aspiratora osobistego SidePak model AM520, a także z użyciem urządzenia referencyjnego LVS3D metodą grawimetryczną. Ustalono wartość współczynnika kalibracji dla optycznego miernika i zgodność pomiarów wykonanych obydwiema metodami. Wyniki Zakres wartości fotometrycznego współczynnika kalibracji kształtował się na poziomie 0,33–0,40 i był zbieżny z wartością 0,38 zalecaną przez producenta. Współczynnik determinacji dla zależności wyników uzyskanych metodą optyczną oraz grawimetryczną był bardzo wysoki i wynosił R2 = 0,91. Wnioski Prezentowane wyniki są obiecujące i pozwalają stwierdzić, że optyczny miernik AM520 może być wykorzystywany do oceny indywidualnego narażenia na drobne pyły PM2,5 i PM10 w pomieszczeniach zamkniętych. Med. Pr. 2019;70(2):213–220
    Background An important issue in the assessment of health risks related to air pollution with fine dust is the measurement of individual exposure. Such possibilities are provided by relatively easy to use optical monitors. The aim of the presented work was to assess the possibility of using the AM520 optical monitor to measure individual human exposure to PM2.5 and PM10 indoors by determining the calibration factor and assessing the compliance of the measurement with the reference method. Material and Methods As part of the research, indoor concentrations of PM2.5 and PM10 and were measured (3 locations in the Gliwice Poviat, March−May 2017) with the use of the SidePak Personal Aerosol Monitor AM520, as well as the reference LVS3D device by means of the gravimetric method. The value of the calibration coefficient for the optical monitor was determined, and the consistency of measurements performed with both methods was assessed. Results The photometric calibration factor ranged 0.33−0.40 and was concurrent with the 0.38 value recommended by the manufacturer. The determination coefficient for the correlation between the measurement results obtained with the optical and gravimetric methods was very high (R2 = 0.91). Conclusions The presented results are promising and allow for the conclusion that the AM520 optical monitor can be used to assess individual exposure to PM2.5 and PM10 indoors. Med Pr. 2019;70(2):213–20
    Źródło:
    Medycyna Pracy; 2019, 70, 2; 213-220
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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