Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Ronald G. Pinnick"'
Autor:
Kevin B. Aptowicz, Yong-Le Pan, Elena Fernandez, Richard K. Chang, Ronald G. Pinnick, Sean D. Martin
Publikováno v:
Journal of Quantitative Spectroscopy and Radiative Transfer. 131:13-23
We demonstrate an experimental approach that provides insight into how particle size and shape affect the scattering phase function of atmospheric aerosol particles. Central to our approach is the design of an apparatus that measures the forward and
Publikováno v:
Applied Physics B. 112:89-98
A single-particle fluorescence spectrometer (SPFS) and an aerodynamic particle sizer were used to measure the fluorescence spectra and particle size distribution from the particulate emissions of 12 different burning materials in a tube furnace to si
Publikováno v:
Atmospheric Environment. 65:195-204
The UV-excited laser-induced-fluorescence (UV-LIF) spectra of single atmospheric particles and the three-band integrating-nephelometer elastic scattering of atmospheric aerosol were measured during four approximately 24-h periods on May 2007 in Las C
Autor:
James M. House, Yong-Le Pan, Steven C. Hill, Ronald G. Pinnick, Richard K. Chang, Richard C. Flagan
Publikováno v:
Atmospheric Environment. 45:1555-1563
Fluorescence spectra of aerosolized pollen (12 species or subspecies) and fungal (4 species) samples measured using a Dual-excitation-wavelength Particle Fluorescence Spectrometer (DPFS) are reported. The DPFS records two fluorescence spectra and two
Publikováno v:
Atmospheric Environment. 38:1657-1672
We measured laser-induced fluorescence spectra from individual supermicron-sized atmospheric particles drawn into our laboratory at Adelphi, MD, an urban site in the Washington, DC metroplex. A virtural impactor concentrator is used along with an aer
Autor:
Richard K. Chang, Justin M. Hartings, Yong Le Pan, Justin Halverson, Ronald G. Pinnick, Steven C. Hill
Publikováno v:
Aerosol Science and Technology. 37:628-639
A fluorescence particle spectrometer (FPS) for real-time measurement of the fluorescence spectra of aerosol particles in the size range 1-10 w m diameter is reported. The prototype FPS has a sufficiently high sample rate (from 5 to 28 l/min for 3.5 w
Autor:
S.C. Hill, Stephen Holler, Stanley Niles, Jean-Pierre Wolf, Richard K. Chang, Yong-Le Pan, Ronald G. Pinnick, J.R. Bottiger
Publikováno v:
Applied Physics B. 72:449-454
An unexpected blue-fluorescence band (around 420 nm) from both micrometer-sized dried particles and aqueous droplets of riboflavin [7,8-dimethyl-10-(D-1′-ribityl)-isoalloxazine] is observed when the microparticles are irradiated with a pulsed UV (3
Publikováno v:
Aerosol Science and Technology. 33:334-352
Predictions of the size response of various light-scattering aerosol counters manufactured by Particle Measuring Systems are reported. Models that exploit the high intensity of light available within the cavity of a He-Ne gas laser (generically refer
Autor:
Richard K. Chang, Bean T. Chen, Greg A. Feather, Jerold R. Bottiger, Stephen Holler, Yong-Le Pan, Chun-Sing Orr, Stanley Niles, Steven C. Hill, Ronald G. Pinnick
Publikováno v:
Field Analytical Chemistry & Technology. 3:221-239
Improved real-time methods for characterizing airborne biological particles are needed. Here we review our efforts in developing techniques for measuring the laser-induced fluorescence (total and spectrally dispersed) of individual airborne particles
Publikováno v:
Aerosol Science and Technology. 28:95-104
We report the operation of an aerosol analyzer capable of measuring the fluorescence spectra of single micrometer-sized bioaerosol particles as they flow through the instrument. Particles entrained in an airstream initially traverse a cw (continuous