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Wyszukujesz frazę "airborne bacteria" wg kryterium: Temat


Wyświetlanie 1-2 z 2
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:
Detection of airborne microbes in a composting facility by cultivation based and cultivation-independent methods
Autorzy:
Albrecht, A
Witzenberger, R.
Bernzen, U.
Jackel, U.
Powiązania:
https://bibliotekanauki.pl/articles/50677.pdf
Data publikacji:
2007
Wydawca:
Instytut Medycyny Wsi
Tematy:
composting process
airborne microbe
humification
cultivation-independent method
degradation
organic material
bacteria
fungi
counting efficiency
waste management
detection
compost
Opis:
Standard methods for quantifi cation of airborne bacteria are based on cultivation and counting of grown colonies. From complex natural environments it is known that only a small fraction of the total number of cells can be cultivated on routinely used agar-media. Direct microscopic cell counting after DNA-staining usually generates higher concentrations of one to two magnitudes. The objective of the presented study was to compare the concentrations of airborne bacteria sampled in a composting facility by using for any sample the cultivation on trytic soy agar (TSA) – agar, as well as direct counting after DAPI-staining. The concentrations after counting grown colonies were within a range of 105-107 cfu m-3. Concentrations of direct counted cells ranged between 106-109 microbes m-3. In these comparative measurements only 1.5-15.3% of the airborne bacterial cells enumerated by direct counting formed countable colonies after incubation on TSA-agar. Obviously, cultivation based methods underestimate the real amount of airborne microbes. In addition, from literature it is known that inactive or even dead cells can also have the potential to cause health effects. Consequently, a risk assessment based only on measuring colony forming units may, in some cases, not be sufficient.
Źródło:
Annals of Agricultural and Environmental Medicine; 2007, 14, 1
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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