Lee Sgro - Academia.edu (original) (raw)

Papers by Lee Sgro

Research paper thumbnail of Variations in temperature and performance in a standard and thermally bridged compact fluorescent fixture

Nutrition Metabolism and Cardiovascular Diseases - NUTR METAB CARDIOVASC DIS, 1992

The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofi... more The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofit fixture and the surrounding environment was investigated for a typical recessed fixture application. The minimum lamp wall temperature and light output were measured over time with and without a thermal bridging system. The experimental data were used to design an efficient thermal bridge and to evaluate the performance of the bridge, which was found to increase the relative light output of the fixture of about 20%

Research paper thumbnail of Postflame reaction chemistry of dichloromethane: variations in equivalence ratio and temperature

Combustion and Flame, Mar 1, 2000

We report on the destruction pathways and byproduct formation of dichloromethane (CH2Cl2) in cond... more We report on the destruction pathways and byproduct formation of dichloromethane (CH2Cl2) in conditions typical of incinerator postflame regions (injection temperature = 900–1200 K; equivalence ratio = 0.6, 0.9, 1.0, 1.1; residence time = 0.28–0.35 s). This is the first study to independently vary equivalence ratio and temperature, and evaluate their impacts on byproduct yield and destruction efficiency. We inject

Research paper thumbnail of A Simple Turbulent Mixing CNC for Charged Particle Detection Down to 1.2 nm

Research paper thumbnail of Size distribution of nanoparticles generated by a heating stove burning wood pellets

Research paper thumbnail of Characterization of Combustion-Generated Carbonaceous Nanoparticles by Size-Dependent Ultraviolet Laser Photoionization

The Journal of Physical Chemistry A, 2013

Research paper thumbnail of Surface enhanced Raman spectroscopy (SERS) of particles produced in premixed flame across soot threshold

Proceedings of the Combustion Institute, 2011

Research paper thumbnail of Interaction between combustion-generated organic nanoparticles and biological systems: In vitro study of cell toxicity and apoptosis in human keratinocytes

Research paper thumbnail of On the characterization of nanoparticles emitted from combustion sources related to understanding their effects on health and climate

Journal of Hazardous Materials, 2012

This work describes the use of well-controlled laboratory flames to produce aerosols of organic c... more This work describes the use of well-controlled laboratory flames to produce aerosols of organic carbon (OC) as model particles representative of the OC fraction of combustion-generated particulate matter emissions in fresh exhausts. Water-particle interactions are explored in two specific cases. In the first case, particles are exposed to saturated environments and come into direct contact with liquid water by bubbling flame samples through a column of water. This case is representative of particle-liquid interactions relevant to wet removal routes by particle interception by rain or fog droplets or in biological systems covered with biological fluids composed mostly of water. In the second case, the particles are exposed to sub-saturated vapors with H(2)O concentrations representative of cloud-forming atmospheres. The particles' capacity to serve as atmospheric cloud condensation nuclei (CCN) by rapid growth to droplets was measured and compared to NaCl particles, which are highly soluble particles with well known activation diameters. The results show measureable interactions with water in highly saturated conditions. However, in sub-saturated environments, no growth by water condensation was observed, and fresh emissions of OC nanoparticles are not likely to act as CCN in atmospherically relevant humidity.

Research paper thumbnail of Measurements of Nanoparticles of Organic Carbon and Soot in Flames and Vehicle Exhausts

Environmental Science & Technology, 2008

Research paper thumbnail of Coagulation of Organic Carbon Nanoparticles in Exhaust Conditions

Environmental Engineering Science, 2008

ENVIRONMENTAL ENGINEERING SCIENCE Volume 25, Number 10, 2008 © Mary Ann Liebert, Inc. DOI: 10.108... more ENVIRONMENTAL ENGINEERING SCIENCE Volume 25, Number 10, 2008 © Mary Ann Liebert, Inc. DOI: 10.1089/ees.2007.0189 ... Coagulation of Organic Carbon Nanoparticles in Exhaust Conditions ... Gianluca Lanzuolo,1,* Lee Anne Sgro,1 Andrea De Filippo,1 ...

Research paper thumbnail of Charge fraction distribution of nucleation mode particles: New insight on the particle formation mechanism

Combustion and Flame, 2011

Research paper thumbnail of Investigating the origin of nuclei particles in GDI engine exhausts

Combustion and Flame, 2012

Research paper thumbnail of UV-visible spectroscopy of organic carbon particulate sampled from ethylene/air flames

Research paper thumbnail of Ammonia Detection and Monitoring with Photofragmentation Fluorescence

Research paper thumbnail of Charge Distribution of Incipient Flame-Generated Particles

Aerosol Science and Technology, 2010

We report the size and electrical charge distributions of incipient nanoparticles generated in at... more We report the size and electrical charge distributions of incipient nanoparticles generated in atmospheric pressure hydrocarbon/air premixed flames in conditions prior to the onset of soot particles. The particle size and charge distributions are measured by Differential Mobility Analysis (DMA) and compared to theoretical charge distributions predicted for flame conditions. The results show that the charge distribution attained in flames

Research paper thumbnail of A Simple Turbulent Mixing CNC for Charged Particle Detection Down to 1.2 nm

Aerosol Science & Technology, 2004

Research paper thumbnail of On the relevance of surface growth in soot formation in premixed flames

Proc Combust Inst, 2000

The role of surface growth mechanisms in particle mass accumulation was investigated in rich, pre... more The role of surface growth mechanisms in particle mass accumulation was investigated in rich, premixed, ethylene/air flames from non-sooting to moderately sooting conditions using in situ optical diagnostics and predictions from a detailed chemical kinetic model. Particles ...

Research paper thumbnail of Variations in temperature and performance in a standard and thermally bridged compact fluorescent fixture

Nutrition Metabolism and Cardiovascular Diseases - NUTR METAB CARDIOVASC DIS, 1992

The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofi... more The spatial temperature distribution in an enclosed, screw base, 13 W compact fluorescent retrofit fixture and the surrounding environment was investigated for a typical recessed fixture application. The minimum lamp wall temperature and light output were measured over time with and without a thermal bridging system. The experimental data were used to design an efficient thermal bridge and to evaluate the performance of the bridge, which was found to increase the relative light output of the fixture of about 20%

Research paper thumbnail of Postflame reaction chemistry of dichloromethane: variations in equivalence ratio and temperature

Combustion and Flame, Mar 1, 2000

We report on the destruction pathways and byproduct formation of dichloromethane (CH2Cl2) in cond... more We report on the destruction pathways and byproduct formation of dichloromethane (CH2Cl2) in conditions typical of incinerator postflame regions (injection temperature = 900–1200 K; equivalence ratio = 0.6, 0.9, 1.0, 1.1; residence time = 0.28–0.35 s). This is the first study to independently vary equivalence ratio and temperature, and evaluate their impacts on byproduct yield and destruction efficiency. We inject

Research paper thumbnail of A Simple Turbulent Mixing CNC for Charged Particle Detection Down to 1.2 nm

Research paper thumbnail of Size distribution of nanoparticles generated by a heating stove burning wood pellets

Research paper thumbnail of Characterization of Combustion-Generated Carbonaceous Nanoparticles by Size-Dependent Ultraviolet Laser Photoionization

The Journal of Physical Chemistry A, 2013

Research paper thumbnail of Surface enhanced Raman spectroscopy (SERS) of particles produced in premixed flame across soot threshold

Proceedings of the Combustion Institute, 2011

Research paper thumbnail of Interaction between combustion-generated organic nanoparticles and biological systems: In vitro study of cell toxicity and apoptosis in human keratinocytes

Research paper thumbnail of On the characterization of nanoparticles emitted from combustion sources related to understanding their effects on health and climate

Journal of Hazardous Materials, 2012

This work describes the use of well-controlled laboratory flames to produce aerosols of organic c... more This work describes the use of well-controlled laboratory flames to produce aerosols of organic carbon (OC) as model particles representative of the OC fraction of combustion-generated particulate matter emissions in fresh exhausts. Water-particle interactions are explored in two specific cases. In the first case, particles are exposed to saturated environments and come into direct contact with liquid water by bubbling flame samples through a column of water. This case is representative of particle-liquid interactions relevant to wet removal routes by particle interception by rain or fog droplets or in biological systems covered with biological fluids composed mostly of water. In the second case, the particles are exposed to sub-saturated vapors with H(2)O concentrations representative of cloud-forming atmospheres. The particles' capacity to serve as atmospheric cloud condensation nuclei (CCN) by rapid growth to droplets was measured and compared to NaCl particles, which are highly soluble particles with well known activation diameters. The results show measureable interactions with water in highly saturated conditions. However, in sub-saturated environments, no growth by water condensation was observed, and fresh emissions of OC nanoparticles are not likely to act as CCN in atmospherically relevant humidity.

Research paper thumbnail of Measurements of Nanoparticles of Organic Carbon and Soot in Flames and Vehicle Exhausts

Environmental Science & Technology, 2008

Research paper thumbnail of Coagulation of Organic Carbon Nanoparticles in Exhaust Conditions

Environmental Engineering Science, 2008

ENVIRONMENTAL ENGINEERING SCIENCE Volume 25, Number 10, 2008 © Mary Ann Liebert, Inc. DOI: 10.108... more ENVIRONMENTAL ENGINEERING SCIENCE Volume 25, Number 10, 2008 © Mary Ann Liebert, Inc. DOI: 10.1089/ees.2007.0189 ... Coagulation of Organic Carbon Nanoparticles in Exhaust Conditions ... Gianluca Lanzuolo,1,* Lee Anne Sgro,1 Andrea De Filippo,1 ...

Research paper thumbnail of Charge fraction distribution of nucleation mode particles: New insight on the particle formation mechanism

Combustion and Flame, 2011

Research paper thumbnail of Investigating the origin of nuclei particles in GDI engine exhausts

Combustion and Flame, 2012

Research paper thumbnail of UV-visible spectroscopy of organic carbon particulate sampled from ethylene/air flames

Research paper thumbnail of Ammonia Detection and Monitoring with Photofragmentation Fluorescence

Research paper thumbnail of Charge Distribution of Incipient Flame-Generated Particles

Aerosol Science and Technology, 2010

We report the size and electrical charge distributions of incipient nanoparticles generated in at... more We report the size and electrical charge distributions of incipient nanoparticles generated in atmospheric pressure hydrocarbon/air premixed flames in conditions prior to the onset of soot particles. The particle size and charge distributions are measured by Differential Mobility Analysis (DMA) and compared to theoretical charge distributions predicted for flame conditions. The results show that the charge distribution attained in flames

Research paper thumbnail of A Simple Turbulent Mixing CNC for Charged Particle Detection Down to 1.2 nm

Aerosol Science & Technology, 2004

Research paper thumbnail of On the relevance of surface growth in soot formation in premixed flames

Proc Combust Inst, 2000

The role of surface growth mechanisms in particle mass accumulation was investigated in rich, pre... more The role of surface growth mechanisms in particle mass accumulation was investigated in rich, premixed, ethylene/air flames from non-sooting to moderately sooting conditions using in situ optical diagnostics and predictions from a detailed chemical kinetic model. Particles ...