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10.1080/15459624.2020.1786576 http://scihub22266oqcxt.onion/10.1080/15459624.2020.1786576 32795221!ä!32795221 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       J+Occup+Environ+Hyg 2020 ; 17 (9): 390-397 Nephropedia Template TP {{tp|p=32795221|t=2020. UV light dosage distribution over irregular respirator surfaces Methods and implications for safety |pdf=|usr=}}{{32795221}} gab.com Text UV light dosage distribution over irregular respirator surfaces Methods and implications for safety JO: J Occup Environ Hyg http://www.kidney.de/pget.php?&tw=1&pmid=32795221 #FOAvip The SARS-CoV-2 pandemic has led to a global decrease in personal protective equipment (PPE), especially filtering facepiece respirators (FFRs). Ultraviolet-C wavelength is a promising way of decontamination, however adequate dosimetry is needed to ensure balance between over and underexposed areas and provide reliable results. Our study demonstrates that UVGI light irradiance varies significantly on different respirator angles and propose a method to decontaminate several masks at once ensuring appropriate dosage in shaded zones. An UVGI irradiator was built with internal dimensions of 69.5 x 55 x 33 cm with three 15 W UV lamps. Inside, a grating of 58 x 41 x 15 cm was placed to hold the masks. Two different flat fold respirator models were used to assess irradiance, four of model Aura 9322 3 M of dimensions 17 x 9 x 4 cm (tri-fold), and two of model SAFE 231FFP3NR (bi-fold) with dimensions 17 x 6 x 5 cm. An STN-SilverNova spectrometer was employed to verify wavelength spectrum and surface irradiance. A simulation was performed to find the irradiance pattern inside the box and the six masks placed inside. These simulations were carried out using the software DIALUX EVO 8.2. The data obtained reveal that the irradiance received inside the manufactured UVGI-irradiator depends not only on the distance between the lamps' plane and the base of the respirators but also on the orientation and shape of the masks. This point becomes relevant to assure that all the respirators inside the chamber receive the correct dosage. Irradiance over FFR surfaces depend on several factors such as distance and angle of incidence of the light source. Careful irradiance measurement and simulation can ensure reliable dosage in the whole mask surface, balancing overexposure. Closed box systems might provide a more reliable, reproducible UVGI dosage than open settings. Twit Text FOAVip UV light dosage distribution over irregular respirator surfaces Methods and implications for safety ????J Occup Environ Hyg http://www.kidney.de/pget.php?&tw=1&pmid=32795221 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=32795221 #FOAvip English Wikipedia <ref>{{Cite pmid|32795221}}</ref> UV light dosage distribution over irregular respirator surfaces Methods and implications for safety #MMPMID32795221 Baluja A; Arines J; Vilanova R; Cortinas J; Bao-Varela C; Flores-Arias MT J Occup Environ Hyg 2020[Sep]; 17 (9): 390-397 PMID32795221show ga The SARS-CoV-2 pandemic has led to a global decrease in personal protective equipment (PPE), especially filtering facepiece respirators (FFRs). Ultraviolet-C wavelength is a promising way of decontamination, however adequate dosimetry is needed to ensure balance between over and underexposed areas and provide reliable results. Our study demonstrates that UVGI light irradiance varies significantly on different respirator angles and propose a method to decontaminate several masks at once ensuring appropriate dosage in shaded zones. An UVGI irradiator was built with internal dimensions of 69.5 x 55 x 33 cm with three 15 W UV lamps. Inside, a grating of 58 x 41 x 15 cm was placed to hold the masks. Two different flat fold respirator models were used to assess irradiance, four of model Aura 9322 3 M of dimensions 17 x 9 x 4 cm (tri-fold), and two of model SAFE 231FFP3NR (bi-fold) with dimensions 17 x 6 x 5 cm. An STN-SilverNova spectrometer was employed to verify wavelength spectrum and surface irradiance. A simulation was performed to find the irradiance pattern inside the box and the six masks placed inside. These simulations were carried out using the software DIALUX EVO 8.2. The data obtained reveal that the irradiance received inside the manufactured UVGI-irradiator depends not only on the distance between the lamps' plane and the base of the respirators but also on the orientation and shape of the masks. This point becomes relevant to assure that all the respirators inside the chamber receive the correct dosage. Irradiance over FFR surfaces depend on several factors such as distance and angle of incidence of the light source. Careful irradiance measurement and simulation can ensure reliable dosage in the whole mask surface, balancing overexposure. Closed box systems might provide a more reliable, reproducible UVGI dosage than open settings. |*Ultraviolet Rays[MESH] |Betacoronavirus[MESH] |COVID-19[MESH] |Coronavirus Infections/*epidemiology[MESH] |Decontamination/*methods[MESH] |Equipment Reuse[MESH] |Humans[MESH] |Pandemics[MESH] |Pneumonia, Viral/*epidemiology[MESH] |Radiation Dosage[MESH] |Respiratory Protective Devices/*microbiology[MESH]UV light dosage distribution over irregular respirator surfaces Metho(epmc).pdf DeepDyve Pubget Overpricing