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1. Comparison of UV-Induced Inactivation and RNA Damage in MS2 Phage across the Germicidal UV Spectrum
Published: 3/11/2016
Authors: Sara E. Beck, Roberto A Rodriguez, Karl G. Linden, Thomas M Hargy, Thomas C Larason, Michael A. Hawkins
Abstract: Polychromatic UV irradiation is a common method of pathogen inactivation in the water treatment industry. To improve its disinfection efficacy, more information on the mechanisms of UV inactivation on microorganisms at wavelengths throughout the germ ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919167

2. Calibration procedure for UV-365 integrated irradiance measurements
Published: 9/8/2015
Authors: George P Eppeldauer, Thomas C Larason, Robert Edward Vest, Uwe Arp, Howard W Yoon
Abstract: Since the CIE standardized rectangular-shape spectral response function for the 320 nm to 400 nm wavelength range can be realized only with large spectral mismatch, the realized UV-A meters have different response functions resulting in large errors ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918874

3. Standardization of UV LED measurements
Published: 9/8/2015
Authors: George P Eppeldauer, Thomas C Larason, Howard W Yoon
Abstract: Traditionally used source spectral-distribution or detector spectral-response based standards cannot be applied for accurate UV LED measurements. Since the CIE standardized rectangular-shape spectral response function for UV measurements cannot be re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=919079

4. New night vision goggle gain definition
Published: 5/12/2015
Authors: Vyacheslav B Podobedov, George P Eppeldauer, Thomas C Larason
Abstract: A new definition is proposed for the calibration of Night Vision Goggle (NVG) gains. This definition is based on the measurement of radiometric input and output quantities of the NVG. While the old definition used the ,equivalent fLŠ which is a non S ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=918294

5. Action spectra for validation of pathogen disinfection in medium-pressure ultraviolet (UV) systems
Published: 12/12/2014
Authors: Sara E. Beck, Harold B Wright, Thomas M Hargy, Thomas C Larason, Karl G. Linden
Abstract: Ultraviolet (UV) reactors used for disinfecting water and wastewater must be validated and monitored over time. The validation process requires understanding the photochemical properties of the pathogens of concern and the challenge microorganisms ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916116

6. IR-enhanced Si reference detectors for 1-step scale transfers from 300 nm to 1000 nm
Published: 11/20/2014
Authors: George P Eppeldauer, Thomas C Larason, Jeanne M Houston, Robert Edward Vest, Uwe Arp, Howard W Yoon
Abstract: IR-enhanced Si photodiodes have improved radiometric and electronic characteristics as compared to other widely used Si photodiodes and can be used as responsivity standards in the wavelength range from 300 nm to 1000 nm. Their low predicted uncerta ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916505

7. Wavelength Dependent UV Inactivation and DNA Damage of Adenovirus 2 as Measured by Cell Culture Infectivity and Long Range Quantitative PCR
Published: 11/22/2013
Authors: Sara E. Beck, Roberto A. Rodriguez, Karl G. Linden, Thomas M. Hargy, Thomas C Larason, Harold B. Wright
Abstract: Adenovirus is regarded as the most resistant pathogen to ultraviolet (UV) disinfection due to its demonstrated resistance to monochromatic, low-pressure (LP) UV irradiation at 254 nm. This resistance has resulted in high UV dose requirements for all ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914481

8. Measuring the UV Action Spectra of Pathogens and Surrogates
Published: 9/22/2013
Authors: Karl G. Linden, Harold B Wright, Sara E. Beck, Thomas M Hargy, Thomas C Larason, Randi M. McCuin
Abstract: The use of bioassays to determine reduction equivalent doses delivered by UV reactors is recognized as an effective measure of UV disinfection systems. Low pressure (LP) UV delivered in controlled collimated beam systems provides dose response curve ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914507

9. Using a Tunable Ultraviolet Laser for the Inactivation of Water Pathogens
Published: 9/22/2013
Authors: Thomas C Larason, Keith R. Lykke, Ping-Shine Shaw, Lin Chungsan
Abstract: Ultraviolet (UV) radiation effectively inactivates common pathogens found in ground and surface waters such as Cryptosporidium, Giardia, and most bacterial pathogens (e.g. E. coli). Water treatment facilities are now using UV radiation for disinfect ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914548

10. Development of in-situ calibration method for current-to-voltage converters for high-accuracy SI-traceable low-DC-current measurements
Published: 9/20/2013
Authors: George P Eppeldauer, Howard W Yoon, Dean G Jarrett, Thomas C Larason
Abstract: For photocurrent measurements with low uncertainties, wide-dynamic range reference current-to-voltage converters and a new converter calibration method have been developed at the National Institute of Standards and Technology (NIST). The high feedba ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=914149



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