Temat: microbial air quality - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Kierunki rozwoju pomiarów zapachu i zawartości związków mVOC we wnętrzach budynków
Trends in odour measurements and determining mVOC content in the interiors of buildings
Autorzy:: Kostyrko, K. B.
Kozicki, M.
Powiązania:: https://bibliotekanauki.pl/articles/267570.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:: odorant
powietrze wewnętrzne
moc
indoor air quality
IAQ
microbial volatile organic compounds
mVOC
Opis:: Praca zawiera zestawienie współczesnych technik służących do pomiarów zapachu jak również dopuszczalnych poziomów stężeń substancji uciążliwych zapachowo występujących we wnętrzach budynków. Scharakteryzowano lotne związki organiczne pochodzenia mikrobiologicznego, odpowiedzialne za różnego rodzaju zapachy, jak również techniki analityczne służące do ich chemicznej charakterystyki. Szczególną uwagę poświęcono elektronicznym nosom, będącym coraz powszechniejszymi, często przenośnymi, urządzeniami służącymi do monitorowania stężenia odorantów zapewniającymi analizę w czasie rzeczywistym.
The work summarizes contemporary techniques for odour measurements as well as permissible levels of concentrations of odorous substances occurring in the interiors of buildings. Microbial volatile organic compounds which are responsible for various smells have been characterized. The most suitable techniques for sampling and MVOC chemical characterization in indoor environments were reviewed. The olfactometric techniques are discussed and the strong and weak points of odour assessment through human detection are highlighted. Particular attention was paid to electronic noses, which are increasingly common, often portable, devices for monitoring the concentration of odorants providing real-time analysis.
Źródło:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2018, 59; 97-102
1425-5766
2353-1290
Pojawia się w:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Microbiological characterization of stable resuspended dust
Autorzy:: Kováts, Nora
Horváth, Eszter
Jancsek-Turóczi, Beatrix
Hoffer, András
Gelencsér, András
Urbán, Péter
Kiss, Írisz E.
Bihari, Zoltán
Fekete, Csaba
Powiązania:: https://bibliotekanauki.pl/articles/2177051.pdf
Data publikacji:: 2015-11-23
Wydawca:: Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:: stable
air quality
dust
microbial community
next generation sequencing
pathogens
Opis:: Objectives Air quality in the stables is characterized by elevated level of dust and aeroallergens which are supposed to directly cause or exacerbate several respiratory disorders. The most often recognized problem is recurrent airway obstruction (RAO), previously known as chronic obstructive pulmonary disease (COPD). There is some indication that aeroallergens (among them endotoxins) may also cause inflammation in human airways and may exceed safe levels in stables. Monitoring studies have covered mainly the determination of the concentration of respirable particles and of culturable fungi and their toxins. However, these particles do not only directly affect the respiratory system, but might act as a carrier conveying toxic contaminants and biological agents such as bacteria. In a typical, 20-horse Hungarian stable, microbial community of respirable fraction of resuspended dust has been characterized to reveal if these particles convey hazardous pathogenic bacteria, posing risk to either horses or staff. Material and Methods Resuspended dust was sampled using a mobile instrument. The instrument contains a PARTISOL-FRM model 2000 sampler that was operated at a flow rate of 16.7 l/min and a cyclone separator which collected the particulate matter with an aerodynamic size between 1 μm and 10 μm (PM 1–10) fraction. Microbial taxa were identified by culture-independent next generation sequencing (NGS) of variable 16S ribosomal ribonucleic acid (rRNA) gene regions. Results In total, 1491 different taxa were identified, of them 384 were identified to species level, 961 to genus level. The sample was dominated by common ubiquitous soil and organic material-dwelling taxa. Conclusions Pathogens occurred at low abundance, and were represented by mostly facultative human pathogens, with the prevalence of Staphylococcus species.
Źródło:: International Journal of Occupational Medicine and Environmental Health; 2016, 29, 3; 375-380
1232-1087
1896-494X
Pojawia się w:: International Journal of Occupational Medicine and Environmental Health
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Microbiological Quality of Indoor and Outdoor Air in a Municipal Wastewater Treatment Plant – A Case Study
Autorzy:: Staszowska, Amelia
Powiązania:: https://bibliotekanauki.pl/articles/2027817.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: microbial air quality
wastewater treatment plant
bioaerosol
Opis:: Wastewater treatment plants (WWTPs) have been recognized as a source of odors and microbial pathogens to the outdoor air. The results of many studies revealed that high amounts of microorganisms are not only present in the stream of wastewater or sludges but also in the bioaerosols that are generated during the different stages of the wastewater treatment. Hence, possible migration of biological contaminants into the interiors cannot be excluded. However, there is a knowledge gap in an assessment of the microbiological indoor air quality of the facilities located at WWTPs. The aim of this study was to evaluate the level of outdoor microbial air contamination upon the indoor environment based on the determined outdoor to indoor (O/I) ratios. The sampling of airborne bacteria and fungi was conducted in three replications with the sedimentation and impaction method, during a one-year survey in ten technological and office buildings as well as their vicinity, at the municipal wastewater treatment plant of Lublin (Poland). Moreover, the cleanliness of hand contact surfaces in staff rooms was examined (Rodac plates). Additionally, API identification of bacteria and fungi was carried out. The highest concentration of total bacteria count (3617 CFU/$m^3$) and fungi in bioaerosols (5386 CFU/$m^3$) was detected in the air around the sewage pumping station, close to the aeration tanks. P. fluorescens was found in the air around the grit chamber (78 CFU/$m^3$). The majority of the examined indoor air samples were characterized with different levels of microbiological contamination – from non-polluted to moderately polluted. The number of total bacteria counts ranged from 180 to 4679 CFU/$m^3$. The highest estimated indoor fungi concentration was 4022 CFU/$m^3$. The controlled surfaces were mostly contaminated with the Actinomycetes and Coliform bacteria. No Salmonella sp. were detected. The bacteria from the Enetrobacteriaceae family were commonly isolated from the indoor and outdoor air samples. The obtained data can be used to devise further guidelines facilitating control and management of WWTP to avoid or minimize the staff exposure.
Źródło:: Journal of Ecological Engineering; 2022, 23, 2; 185-190
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Evaluation of Dominant Microbial Air Pollutants in Hospital Environments and Nearby Areas in Albania
Autorzy:: Troja, Erjon
Ceci, Ranela
Markaj, Albana
Dhamo, Eltion
Troja, Rozana
Powiązania:: https://bibliotekanauki.pl/articles/1838419.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: microbial contamination
air quality
hospital environment
Tirana
Albania
Opis:: Nowadays, one of the most important and essential aspects of having a healthy and safe life is the air safety and its quality in indoor and outdoor environments. In the air, there are not only chemical pollutants but also biological ones, with specific impacts. Hospital environments are among the most likely to be affected by the microbiological contamination of the air; therefore its quality is particularly important. Pathogenic microorganisms, which may be present in the air, can cause nosocomial infections in hospitalized patients, with compromised immune system or other medical conditions. This paper reflects the evaluation of microbiological air contamination, in different hospital environments and nearby areas, in the city of Tirana. The microbial air quality has been monitored during the period of 2009–2018, performing evaluations every three years, in the same area and the same time of the year. In order to build a database for understanding the impact of developmental changes on the air microbiological loads, results of similar studies conducted earlier, during 2007 and 2008 were also taken into consideration. The above-mentioned period was selected because of the changes in the infrastructure and indoor environments of the monitored area, where many patients have been treated for years. Changes have been made over the years to hospital structures and surroundings, including recreational facilities, clinical service units, as well as main and connecting roads, etc. The obtained results, which were compared over the years, provided a clear view of the changing microbiological air loads, influenced by the improvements of indoor and outdoor areas. The morphological studies of the observed, isolated, purified and identified microorganisms revealed the presence of specific mold loads, with the dominance of the species of Aspergillus genus and those of the group Fungi imperfecti. Over the years, a decrease in the total number was observed (from 103 to 101), together with a smaller number of bacteria (1012), in the monitored environments.
Źródło:: Journal of Ecological Engineering; 2021, 22, 5; 32-38
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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