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Michael G. Kimlin - One of the best experts on this subject based on the ideXlab platform.

  • Personal solar UV exposure measurements employing Polysulphone with an extended dynamic range
    2020
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been made more feasible with the use of these Polysulphone dosimeters with an extended dynamic range compared with unfiltered Polysulphone dosimeters.

  • Personal solar UV Exposure Measurements Employing Modified Polysulphone with an Extended Dynamic Range†¶
    Photochemistry and Photobiology, 2007
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been made more feasible with the use of these Polysulphone dosimeters with an extended dynamic range compared with unfiltered Polysulphone dosimeters

  • personal solar uv exposure measurements employing modified Polysulphone with an extended dynamic range
    Photochemistry and Photobiology, 2004
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Abstract Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been...

  • extending the dynamic range of Polysulphone for measuring uv exposures
    Ultraviolet Ground- and Space-based Measurements Models and Effects III, 2003
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    [Abstract]: Polysulphone has been widely used as a dosimeter to quantify personal solar UV exposures to humans during normal daily activities. In summer at sub-tropical and tropical latitudes, the dynamic range for UV exposures allows the use of the Polysulphone to measure solar UV over periods of approximately three to six hours. The use of mesh as a filter over the Polysulphone has been previously reported to extend the dynamic range. In this paper the use of a simple filter that is incorporated as part of the dosimeter is reported. The dynamic range of the Polysulphone was significantly extended with the incorporation of the filter by a factor of approximately four to five.

  • Polysulphone film thickness and its effects in ultraviolet radiation dosimetry
    1999
    Co-Authors: Alfio V. Parisi, Lennox R Meldrum, Michael G. Kimlin
    Abstract:

    Polysulphone film thickness and the effects on the dose calibration in ultraviolet radiation dosimetry were investigated. Compared to those obtained with the dose calibration for the 45 micrometre thick film the erythemal exposures determined from the dose calibrations for the 18, 20 and 30 micrometre thick film ranged from 33% to 45%. The absolute of the differences averaged to 22%, 37% and 19% for the 18, 20 and 30 micrometre thick respectively. The variations in the dose response of Polysulphone film with different thickness have shown that the dose response is highly dependent on the film thickness and highlighted the importance of employing Polysulphone film of consistent and reproducible thickness in ultraviolet photobiology research.

Alfio V. Parisi - One of the best experts on this subject based on the ideXlab platform.

  • Personal solar UV exposure measurements employing Polysulphone with an extended dynamic range
    2020
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been made more feasible with the use of these Polysulphone dosimeters with an extended dynamic range compared with unfiltered Polysulphone dosimeters.

  • Golfers and UV exposures: an application of miniaturised Polysulphone dosimetry
    2020
    Co-Authors: Nathan Downs, Alfio V. Parisi, Peter Schouten, Joanna Turner
    Abstract:

    Miniaturised ultraviolet (UV) dosimeters have been manufactured from Polysulphone film adhered to lightweight cardboard frames measuring 15 mm by 10 mm with a clear circular aperture of 6 mm. The Polysulphone film cast to a thickness of 40 μm was calibrated to the erythemally effective ultraviolet measured by a scanning spectroradiometer (Bentham Instruments, Reading UK) located at the University of Southern Queensland Toowoomba campus. The small, flexible miniaturised UV dosimeters were attached to the vertex, forearm and upper back of golfers and office workers during a series of 9-hole golf rounds run between February through to July 2008. The calibrated erythemally effective UV exposures were compared between the office workers and golf players. Results are presented for the golfers and office workers measured over varying solar zenith angles and weather conditions. The UV exposures of both groups measured in the period are further compared to recommended thresholds of UV for daily occupational exposure and for healthy vitamin D3 synthesis.

  • Personal solar UV Exposure Measurements Employing Modified Polysulphone with an Extended Dynamic Range†¶
    Photochemistry and Photobiology, 2007
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been made more feasible with the use of these Polysulphone dosimeters with an extended dynamic range compared with unfiltered Polysulphone dosimeters

  • personal solar uv exposure measurements employing modified Polysulphone with an extended dynamic range
    Photochemistry and Photobiology, 2004
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    Abstract Polysulphone dosimeters using a simple to use filter have been developed and tested to provide an extended dynamic measurement range of personal solar UV exposures over an extended period (3 to 6 days). At a Southern Hemisphere subtropical site (27.6°S, 151.9°E), the dynamic range of the filtered Polysulphone allowed measurements of erythemal exposures to approximately 100 minimum erythemal dose (MED) for a change in optical absorbance at 330 nm (ΔA330) of 0.35. In comparison, unfiltered Polysulphone dosimeters were exposed to approximately 8 MED for the same ΔA330. The error associated with the use of the filtered Polysulphone dosimeters is of the order of ±15%, compared with ±10% of the unfiltered variety. The developed filtered Polysulphone dosimeter system allowed the measurement of erythemal UV exposures over 3 to 6 days at a subtropical site without the need to replace the dosimeters because of saturation. The results show that longer-term measurement programs of personal solar UV have been...

  • extending the dynamic range of Polysulphone for measuring uv exposures
    Ultraviolet Ground- and Space-based Measurements Models and Effects III, 2003
    Co-Authors: Alfio V. Parisi, Michael G. Kimlin
    Abstract:

    [Abstract]: Polysulphone has been widely used as a dosimeter to quantify personal solar UV exposures to humans during normal daily activities. In summer at sub-tropical and tropical latitudes, the dynamic range for UV exposures allows the use of the Polysulphone to measure solar UV over periods of approximately three to six hours. The use of mesh as a filter over the Polysulphone has been previously reported to extend the dynamic range. In this paper the use of a simple filter that is incorporated as part of the dosimeter is reported. The dynamic range of the Polysulphone was significantly extended with the incorporation of the filter by a factor of approximately four to five.

Takeshi Matsuura - One of the best experts on this subject based on the ideXlab platform.

Chen Huang - One of the best experts on this subject based on the ideXlab platform.

  • honeycomb like Polysulphone polyurethane nanofiber filter for the removal of organic inorganic species from air streams
    Journal of Hazardous Materials, 2018
    Co-Authors: Xin Chen, Qin Fei Ke, Meimei Liang, Yuanyuan Fang, He Xu, Yang Xu, Chen Huang
    Abstract:

    Abstract Nanofiber nonwoven filters, especially those prepared by electrospinning, are of particular interest because of their high filtration efficiency. However, existing electrospun filters suffer from inherent limitations in that both strengths and filtration resistances of the filters leave much to be desired. Herein, we present a novel nonwoven filter that is composed of Polysulphone and polyurethane nanofibers. By mimicking the honeycomb structure, a heterogeneous distribution of both fiber diameter and fiber density has been achieved. Compared with nanofiber nonwovens with plain architectures, the honeycomb-like nonwovens possess higher filtration efficiency (∼99.939%), better mechanical strength (∼105.24 N g−1) and improved quality factor (∼0.04 Pa−1). The filtration efficiency against both inorganic and organic aerosols is guaranteed through the nanofiber surface geometry and the intrinsic charge-retention capacity of Polysulphone. Since the production of this nanofiber filter does not need multistep procedures and can be easily scaled up on a needleless electrospinning device, we anticipate that the strategy of endowing nanofibers with honeycomb texture and charge-retention capacity may lead to the development of advanced fiber filters.

  • Honeycomb-like Polysulphone/polyurethane nanofiber filter for the removal of organic/inorganic species from air streams
    Journal of Hazardous Materials, 2018
    Co-Authors: Xin Chen, Qin Fei Ke, Meimei Liang, Yuanyuan Fang, He Xu, Yang Xu, Chen Huang
    Abstract:

    Abstract Nanofiber nonwoven filters, especially those prepared by electrospinning, are of particular interest because of their high filtration efficiency. However, existing electrospun filters suffer from inherent limitations in that both strengths and filtration resistances of the filters leave much to be desired. Herein, we present a novel nonwoven filter that is composed of Polysulphone and polyurethane nanofibers. By mimicking the honeycomb structure, a heterogeneous distribution of both fiber diameter and fiber density has been achieved. Compared with nanofiber nonwovens with plain architectures, the honeycomb-like nonwovens possess higher filtration efficiency (∼99.939%), better mechanical strength (∼105.24 N g−1) and improved quality factor (∼0.04 Pa−1). The filtration efficiency against both inorganic and organic aerosols is guaranteed through the nanofiber surface geometry and the intrinsic charge-retention capacity of Polysulphone. Since the production of this nanofiber filter does not need multistep procedures and can be easily scaled up on a needleless electrospinning device, we anticipate that the strategy of endowing nanofibers with honeycomb texture and charge-retention capacity may lead to the development of advanced fiber filters.

Masakazu Yoshikawa - One of the best experts on this subject based on the ideXlab platform.