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  1. Article ; Online: A New Method of Removing Fine Particulates Using an Electrostatic Force.

    Heo, Jaeseok / Jang, Yelim / Versoza, Michael / Kim, Gihwan / Park, Duckshin

    International journal of environmental research and public health

    2021  Volume 18, Issue 12

    Abstract: Many studies have found that the concentration of fine particulates in the atmosphere has increased. In particular, when using the bus, the situation in which people are exposed to relatively high concentrations of fine particulates is increasing. The ... ...

    Abstract Many studies have found that the concentration of fine particulates in the atmosphere has increased. In particular, when using the bus, the situation in which people are exposed to relatively high concentrations of fine particulates is increasing. The purpose of this study is to reduce exposure to these potentially harmful particulates by introducing open shelters at outdoor bus stops. In order to use it as an outdoor fine particulates reduction device, a brush filter using electrostatic force (EF) was used on an experimental scale and the generation of electrostatic force, according to the material, was examined. As electrostatic force was generated, the fine particulates collection performance was about 90% efficiency. In addition, it was confirmed that the efficiency of each particle size was improved by 57% through structural improvement. Finally, through experimentation, it was confirmed that the brush module can be used for about 70 days.
    MeSH term(s) Air Pollutants/analysis ; Coal ; Dust ; Humans ; Particle Size ; Static Electricity
    Chemical Substances Air Pollutants ; Coal ; Dust
    Language English
    Publishing date 2021-06-08
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ISSN 1660-4601
    ISSN (online) 1660-4601
    DOI 10.3390/ijerph18126199
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Solid Oxygen-Purifying (SOP) Filters: A Self-Disinfecting Filters to Inactivate Aerosolized Viruses.

    Versoza, Michael / Heo, Jaeseok / Ko, Sangwon / Kim, Minjeong / Park, Duckshin

    International journal of environmental research and public health

    2020  Volume 17, Issue 21

    Abstract: Normal heating, ventilation, and air conditioning (HVAC) systems typically use high-efficiency particulate air (HEPA) filters, which can filter dust, various pollutants, and even bacteria and viruses from indoor air. However, since HEPA filters cannot ... ...

    Abstract Normal heating, ventilation, and air conditioning (HVAC) systems typically use high-efficiency particulate air (HEPA) filters, which can filter dust, various pollutants, and even bacteria and viruses from indoor air. However, since HEPA filters cannot not clean themselves and due to the nature of these microbes which can survive for long periods of time, changing these filters improperly could transmit pathogenic bacteria or viruses, and could even lead to new infections. This study indicated that these manufactured Solid Oxygen-purifying (SOP) filters have the potential to self-disinfect, filter, and inactivate aerosolized viruses. MS2 bacteriophage was used as a model virus in two different experiments. The first experiment involved aerosolization of the virus, while the second were a higher viral load using a soaking method. The SOP filters inactivated up to 99.8% of the virus particles in both experiments, provided that the density of the SOP filter was high. Thus, SOP filters could self-clean, which led to protection against airborne and aerosolized viruses by inactivating them on contact. Furthermore, SOP filters could be potentially use or addition in HVAC systems and face masks to prevent the transmission of airborne and aerosolized viruses.
    MeSH term(s) Air Filters ; Air Pollution, Indoor/analysis ; Disinfection ; Environmental Monitoring ; Filtration/instrumentation ; Oxygen ; Virus Inactivation ; Viruses
    Chemical Substances Oxygen (S88TT14065)
    Keywords covid19
    Language English
    Publishing date 2020-10-27
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2175195-X
    ISSN 1660-4601 ; 1661-7827
    ISSN (online) 1660-4601
    ISSN 1661-7827
    DOI 10.3390/ijerph17217858
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: A New Method of Removing Fine Particulates Using an Electrostatic Force

    Jaeseok Heo / Yelim Jang / Michael Versoza / Gihwan Kim / Duckshin Park

    International Journal of Environmental Research and Public Health, Vol 18, Iss 6199, p

    2021  Volume 6199

    Abstract: Many studies have found that the concentration of fine particulates in the atmosphere has increased. In particular, when using the bus, the situation in which people are exposed to relatively high concentrations of fine particulates is increasing. The ... ...

    Abstract Many studies have found that the concentration of fine particulates in the atmosphere has increased. In particular, when using the bus, the situation in which people are exposed to relatively high concentrations of fine particulates is increasing. The purpose of this study is to reduce exposure to these potentially harmful particulates by introducing open shelters at outdoor bus stops. In order to use it as an outdoor fine particulates reduction device, a brush filter using electrostatic force (EF) was used on an experimental scale and the generation of electrostatic force, according to the material, was examined. As electrostatic force was generated, the fine particulates collection performance was about 90% efficiency. In addition, it was confirmed that the efficiency of each particle size was improved by 57% through structural improvement. Finally, through experimentation, it was confirmed that the brush module can be used for about 70 days.
    Keywords bus stops ; shelters ; electrostatic force ; brush filter ; fine particulates ; rotation ; Medicine ; R
    Language English
    Publishing date 2021-06-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Solid Oxygen-Purifying (SOP) Filters

    Michael Versoza / Jaeseok Heo / Sangwon Ko / Minjeong Kim / Duckshin Park

    International Journal of Environmental Research and Public Health, Vol 17, Iss 7858, p

    A Self-Disinfecting Filters to Inactivate Aerosolized Viruses

    2020  Volume 7858

    Abstract: Normal heating, ventilation, and air conditioning (HVAC) systems typically use high-efficiency particulate air (HEPA) filters, which can filter dust, various pollutants, and even bacteria and viruses from indoor air. However, since HEPA filters cannot ... ...

    Abstract Normal heating, ventilation, and air conditioning (HVAC) systems typically use high-efficiency particulate air (HEPA) filters, which can filter dust, various pollutants, and even bacteria and viruses from indoor air. However, since HEPA filters cannot not clean themselves and due to the nature of these microbes which can survive for long periods of time, changing these filters improperly could transmit pathogenic bacteria or viruses, and could even lead to new infections. This study indicated that these manufactured Solid Oxygen-purifying (SOP) filters have the potential to self-disinfect, filter, and inactivate aerosolized viruses. MS2 bacteriophage was used as a model virus in two different experiments. The first experiment involved aerosolization of the virus, while the second were a higher viral load using a soaking method. The SOP filters inactivated up to 99.8% of the virus particles in both experiments, provided that the density of the SOP filter was high. Thus, SOP filters could self-clean, which led to protection against airborne and aerosolized viruses by inactivating them on contact. Furthermore, SOP filters could be potentially use or addition in HVAC systems and face masks to prevent the transmission of airborne and aerosolized viruses.
    Keywords self-cleaning filters ; viral aerosol inactivation ; solid oxygen-purifying filters ; HVAC filter application ; viral protection ; face mask application ; Medicine ; R
    Subject code 500
    Language English
    Publishing date 2020-10-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Reduction of

    Versoza, Michael / Jung, Wonseok / Barabad, Mona Loraine / Ko, Sangwon / Kim, Minjeong / Park, Duckshin

    International journal of environmental research and public health

    2019  Volume 16, Issue 20

    Abstract: Although metal contact is known to reduce bacterial growth, the effects of physical barriers and electricity need further investigation. This study examined the bacteria-reducing properties of copper and stainless-steel metal plates with an added ... ...

    Abstract Although metal contact is known to reduce bacterial growth, the effects of physical barriers and electricity need further investigation. This study examined the bacteria-reducing properties of copper and stainless-steel metal plates with an added electrical current and up to three filter layers on the growth of
    MeSH term(s) Copper/pharmacology ; Electricity ; Escherichia coli/drug effects ; Levivirus/drug effects ; Metals/pharmacology ; Stainless Steel/pharmacology
    Chemical Substances Metals ; Stainless Steel (12597-68-1) ; Copper (789U1901C5)
    Language English
    Publishing date 2019-10-14
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1660-4601
    ISSN (online) 1660-4601
    DOI 10.3390/ijerph16203887
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Inactivation of filter bound aerosolized MS2 bacteriophages using a non-conductive ultrasound transducer

    Versoza, Michael / Duckshin Park / Kyomin Choi / Mona Loraine Barabad / Wonseok Jung / Yongil Lee

    Journal of virological methods. 2018 May, v. 255

    2018  

    Abstract: The inactivation of viruses that retain their infectivity when transmitted through the air is challenging. To address this issue, this study used a non-contact ultrasound transducer (NCUT) to generate shock waves in the air at specific distances, input ... ...

    Abstract The inactivation of viruses that retain their infectivity when transmitted through the air is challenging. To address this issue, this study used a non-contact ultrasound transducer (NCUT) to generate shock waves in the air at specific distances, input voltages, and exposure durations, targeting bacteriophage virus aerosols captured on to H14 HEPA filters. Initially, a frequency of 27.56 kHz (50V) at 25-mm distance was used, which yielded an inactivation efficiency of up to 32.69 ± 12.10%. Other frequencies at shorter distances were investigated, where 29.10 kHz had the highest inactivation efficiency (up to 81.95 ± 9.79% at 8.5-mm distance and 100 V). Longer exposure times also influenced virus inactivation, but the results were inconclusive because the NCUT overheated with time. Overall, NCUT appears to be a promising method for inactivating virus aerosols that may be safer than other forms of inactivation, which can cause genetic mutations or produce dangerous by-products.
    Keywords aerosols ; air ; bacteriophages ; byproducts ; electric power ; exposure duration ; filters ; mutation ; pathogenicity
    Language English
    Dates of publication 2018-05
    Size p. 76-81.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 8013-5
    ISSN 1879-0984 ; 0166-0934
    ISSN (online) 1879-0984
    ISSN 0166-0934
    DOI 10.1016/j.jviromet.2018.02.015
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 1565: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  7. Article ; Online: Characteristics of Particulate Matter and Volatile Organic Compound Emissions from the Combustion of Waste Vinyl.

    Barabad, Mona Loraine M / Jung, Wonseok / Versoza, Michael E / Lee, Yong-Il / Choi, Kyomin / Park, Duckshin

    International journal of environmental research and public health

    2018  Volume 15, Issue 7

    Abstract: Vinyl samples were burned in a controlled environment to determine the characteristics of particulate matter (PM) and volatile organic compound (VOC) emissions during the combustion process. Open burning of plastic or vinyl products poses several ... ...

    Abstract Vinyl samples were burned in a controlled environment to determine the characteristics of particulate matter (PM) and volatile organic compound (VOC) emissions during the combustion process. Open burning of plastic or vinyl products poses several environmental and health risks in developed and developing countries, due to the release of high concentrations of harmful pollutants. The production of fine and ultrafine particles was significant. At a heat flux of 25 kW/m², the production of PM of 0.35 μm in size was highest at 63.0 μg/m³. In comparison, at fluxes of 35 and 50 kW/m², the production of PM of 0.45 μm in size was highest with values of 67.8 and 87.7 μg/m³, respectively. Benzene, acetone, and other toxic compounds were also identified in the analyses.
    MeSH term(s) Air Pollutants/analysis ; Environmental Monitoring ; Particulate Matter/analysis ; Plastics/analysis ; Plastics/chemistry ; Volatile Organic Compounds/analysis
    Chemical Substances Air Pollutants ; Particulate Matter ; Plastics ; Volatile Organic Compounds
    Language English
    Publishing date 2018-07-02
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1660-4601
    ISSN (online) 1660-4601
    DOI 10.3390/ijerph15071390
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

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  8. Article ; Online: Inactivation of filter bound aerosolized MS2 bacteriophages using a non-conductive ultrasound transducer.

    Versoza, Michael / Jung, Wonseok / Barabad, Mona Loraine / Lee, Yongil / Choi, Kyomin / Park, Duckshin

    Journal of virological methods

    2018  Volume 255, Page(s) 76–81

    Abstract: The inactivation of viruses that retain their infectivity when transmitted through the air is challenging. To address this issue, this study used a non-contact ultrasound transducer (NCUT) to generate shock waves in the air at specific distances, input ... ...

    Abstract The inactivation of viruses that retain their infectivity when transmitted through the air is challenging. To address this issue, this study used a non-contact ultrasound transducer (NCUT) to generate shock waves in the air at specific distances, input voltages, and exposure durations, targeting bacteriophage virus aerosols captured on to H14 HEPA filters. Initially, a frequency of 27.56 kHz (50V) at 25-mm distance was used, which yielded an inactivation efficiency of up to 32.69 ± 12.10%. Other frequencies at shorter distances were investigated, where 29.10 kHz had the highest inactivation efficiency (up to 81.95 ± 9.79% at 8.5-mm distance and 100 V). Longer exposure times also influenced virus inactivation, but the results were inconclusive because the NCUT overheated with time. Overall, NCUT appears to be a promising method for inactivating virus aerosols that may be safer than other forms of inactivation, which can cause genetic mutations or produce dangerous by-products.
    MeSH term(s) Aerosols ; Disinfection/methods ; Levivirus/radiation effects ; Ultrasonic Waves ; Virus Inactivation/radiation effects
    Chemical Substances Aerosols
    Language English
    Publishing date 2018-02-21
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 8013-5
    ISSN 1879-0984 ; 0166-0934
    ISSN (online) 1879-0984
    ISSN 0166-0934
    DOI 10.1016/j.jviromet.2018.02.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 1565: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

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  9. Article ; Online: Comparative Genomics of Closely-Related

    Versoza, Cyril J / Howell, Abigail A / Aftab, Tanya / Blanco, Madison / Brar, Akarshi / Chaffee, Elaine / Howell, Nicholas / Leach, Willow / Lobatos, Jackelyn / Luca, Michael / Maddineni, Meghna / Mirji, Ruchira / Mitra, Corinne / Strasser, Maria / Munig, Saige / Patel, Zeel / So, Minerva / Sy, Makena / Weiss, Sarah /
    Pfeifer, Susanne P

    Viruses

    2022  Volume 14, Issue 8

    Abstract: Bacteriophages infecting bacteria of the ... ...

    Abstract Bacteriophages infecting bacteria of the genus
    MeSH term(s) Bacteriophages/genetics ; Genome, Viral ; Genomics ; Gordonia Bacterium/genetics ; Humans ; Phylogeny ; Waste Water
    Chemical Substances Waste Water
    Language English
    Publishing date 2022-07-27
    Publishing country Switzerland
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v14081647
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Reduction of Escherichia Coli Using Metal Plates with the Influenced of Applied Low Current and Physical Barrier of Filter Layers

    Michael Versoza / Wonseok Jung / Mona Loraine Barabad / Sangwon Ko / Minjeong Kim / Duckshin Park

    International Journal of Environmental Research and Public Health, Vol 16, Iss 20, p

    2019  Volume 3887

    Abstract: Although metal contact is known to reduce bacterial growth, the effects of physical barriers and electricity need further investigation. This study examined the bacteria-reducing properties of copper and stainless-steel metal plates with an added ... ...

    Abstract Although metal contact is known to reduce bacterial growth, the effects of physical barriers and electricity need further investigation. This study examined the bacteria-reducing properties of copper and stainless-steel metal plates with an added electrical current and up to three filter layers on the growth of Escherichia coli (bacteria) and MS2 bacteriophages (virus). When used with a stainless-steel plate, electricity increased bacteria reduction by 39.5 ± 2.30% in comparison with no electricity added, whereas a three-layer physical barrier decreased its efficiency. Copper also reduced the growth of bacteria, by 58.2 ± 8.23%, and the addition of electricity reduced it further (79.5 ± 2.34%). Bacteriophages were also affected by the metal contact. Further experiments showed that MS2 was also reduced by copper, to 82.9 ± 4.5% after 24 h at 37 °C.
    Keywords contact-killing ; metal-plates ; electricity ; filter-layers ; bacteria ; virus ; Medicine ; R
    Language English
    Publishing date 2019-10-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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