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Atmospheric particles with an aerodynamic diameter less than or equal to 2.5 micrometers (PM2.5) were collected at two sites located in the urban area of the city of Cuernavaca (Morelos) during a season when a large number of forest fires occurred. Three dicarboxylic acids (malonic, glutaric and succinic) and levoglucosan were analyzed by liquid chromatography coupled with mass spectrometry (ESI-Q-TOF) and soluble potassium (K+) was analyzed by ion chromatography. The concentration of PM2.5 increased on the days when the highest number of forest fires occurred. A strong correlation was observed between levoglucosan and K+, confirming the hypothesis that both are tracers of biomass burning (r = 0.57, p < 0.05). Levoglucosan (average 367.6 ng m−3, Site 2) was the most abundant compound, followed by succinic acid (average 101.7 ng m−3, Site 2), glutaric acid (average 63.2 ng m−3, Site 2), and malonic acid (average 46.9 ng m−3, Site 2), respectively. The ratio of C3/C4 concentrations ranged from 0.5 to 1.2, with an average of 0.8, which suggests great photochemical activity in the Cuernavaca atmosphere. The ratio of K+/levoglucosan concentrations (0.44) indicates that open fires are the main source of these tracers. The positive correlations between PM2.5 and levoglucosan and succinic and malonic acids suggest that such compounds are contributing to secondary organic aerosol particle formation.
Mónica Ivonne Arias-Montoya; Rebecca López-Márquez; Mario Alfonso Murillo-Tovar; Jorge Antonio Guerrero-Alvarez; Josefina Vergara-Sánchez; Pedro Guillermo Reyes; Fernando Ramos-Quintana; Silvia Montiel-Palma; Hugo Saldarriaga-Noreña. Molecular Markers in Ambient Air Associated with Biomass Burning in Morelos, México. Atmosphere 2020, 11, 491 .
AMA StyleMónica Ivonne Arias-Montoya, Rebecca López-Márquez, Mario Alfonso Murillo-Tovar, Jorge Antonio Guerrero-Alvarez, Josefina Vergara-Sánchez, Pedro Guillermo Reyes, Fernando Ramos-Quintana, Silvia Montiel-Palma, Hugo Saldarriaga-Noreña. Molecular Markers in Ambient Air Associated with Biomass Burning in Morelos, México. Atmosphere. 2020; 11 (5):491.
Chicago/Turabian StyleMónica Ivonne Arias-Montoya; Rebecca López-Márquez; Mario Alfonso Murillo-Tovar; Jorge Antonio Guerrero-Alvarez; Josefina Vergara-Sánchez; Pedro Guillermo Reyes; Fernando Ramos-Quintana; Silvia Montiel-Palma; Hugo Saldarriaga-Noreña. 2020. "Molecular Markers in Ambient Air Associated with Biomass Burning in Morelos, México." Atmosphere 11, no. 5: 491.
This study focuses on the glow discharge generated with a gases mixture of Ethanol (C2H5OH) and Helium (He), at different concentrations maintained at a total pressure of 2.0 Torr. We used optical emission spectroscopy (OES) to analyze the discharge mixture at different concentrations of Helium. Single Langmuir probe data was used to determine the Electron Energy Distribution Function (EEDF). For the total C2H5OH/He mixture plasma concentrations, the EEDF has a Maxwellian distribution function. A decrease in He concentration results in significant changes in the EEDF, this behavior is related to the increase in the C2H5OH percentage must increase the energy loses of the electrons in the inelastic collision with C2H5OH producing a significant change in the EEDF, therefore, the EEDF pattern results in an increase of electron–molecule reaction rates. The rise in electron temperature for increasing Helium percentage is explained by the decreasing electron energy loss in the inelastic collisions with C2H5OH molecule. It observes a decrease of electron density ne as a function of the Helium percentage, which can be related to the ratio between ionization cross sections of Helium and C2H6O molecule. The active species are generated in the electron-molecule processes, which are associated with electron impact dissociation of C2H5OH and Helium electronic impact excitation in the gas phase. The emission optical spectra (OES) show changes in the intensity of the most important peaks of the plasma mixture, which indicates the dependence in the formation of the plasma as a function of the percentage of the gases. The changes in the intensities of the same observed species are due to different processes of excitation and ionization energies of the system, in addition to the increase of He metastable states He I. Hydrogen is the main product obtained from the decomposition of C2H5OH.
A. Gómez; P. G. Reyes; Horacio Martinez; J. Vergara; Cesar Torres; Victor Ulises Contreras. Pathways in the molecular fragmentation for the C2H5OH/He electrical discharge. Radiation Effects and Defects in Solids 2019, 174, 260 -272.
AMA StyleA. Gómez, P. G. Reyes, Horacio Martinez, J. Vergara, Cesar Torres, Victor Ulises Contreras. Pathways in the molecular fragmentation for the C2H5OH/He electrical discharge. Radiation Effects and Defects in Solids. 2019; 174 (3-4):260-272.
Chicago/Turabian StyleA. Gómez; P. G. Reyes; Horacio Martinez; J. Vergara; Cesar Torres; Victor Ulises Contreras. 2019. "Pathways in the molecular fragmentation for the C2H5OH/He electrical discharge." Radiation Effects and Defects in Solids 174, no. 3-4: 260-272.
This work characterizes the degradation of the textile dye azo Acid Black 52 by measuring several physical and chemical parameters. A corona plasma was created at atmospheric pressure and applied on the liquid-air interface of water samples containing the dye. 1.0 mM of ferrous sulfate (FeSO4) was added to 1.0 mM dye solution, for a total volume of 250 mL. For each treatment, a number of parameters were quantified. These were voltage, current, temperature, loss of volume, pH, electrical conductivity, concentration, optical mission spectra, chemical oxygen demand (COD), total organic carbon (TOC), and the removal ratio. Because of the increase in the sample temperature, the volume lost by evaporation was explored. The results show that the efficiency of the dye degradation by plasma is a function of treatment time. Moreover, the reactive concentration of FeSO4 and the exposition time of the plasma were varied at a constant volume, leading to the determination of the concentrations and optimal times. Considering the degradation and removal parameters, at the maximum treated time of 80 min, it found that COD was of 96.36%, TOC of 93.93%, and the removal ratio of 97.47%.
A. Gómez; A. J. Torres-Arenas; J. Vergara-Sánchez; Cesar Torres; P. G. Reyes; H. Martínez; Hugo Saldarriaga Noreña. Physical-chemical characterization of the textile dye Azo Ab52 degradation by corona plasma. AIP Advances 2017, 7, 105304 .
AMA StyleA. Gómez, A. J. Torres-Arenas, J. Vergara-Sánchez, Cesar Torres, P. G. Reyes, H. Martínez, Hugo Saldarriaga Noreña. Physical-chemical characterization of the textile dye Azo Ab52 degradation by corona plasma. AIP Advances. 2017; 7 (10):105304.
Chicago/Turabian StyleA. Gómez; A. J. Torres-Arenas; J. Vergara-Sánchez; Cesar Torres; P. G. Reyes; H. Martínez; Hugo Saldarriaga Noreña. 2017. "Physical-chemical characterization of the textile dye Azo Ab52 degradation by corona plasma." AIP Advances 7, no. 10: 105304.
Horacio Martinez; S. Perusquía; M. Villa; P. G. Reyes; Farook Bashir Yousif; F. Castillo; U. Contreras; Victor Ulises Contreras. Study of DC Ar–CO2mixture plasma using optical emission spectroscopy and mass spectrometry techniques. Physics of Plasmas 2017, 24, 043508 .
AMA StyleHoracio Martinez, S. Perusquía, M. Villa, P. G. Reyes, Farook Bashir Yousif, F. Castillo, U. Contreras, Victor Ulises Contreras. Study of DC Ar–CO2mixture plasma using optical emission spectroscopy and mass spectrometry techniques. Physics of Plasmas. 2017; 24 (4):043508.
Chicago/Turabian StyleHoracio Martinez; S. Perusquía; M. Villa; P. G. Reyes; Farook Bashir Yousif; F. Castillo; U. Contreras; Victor Ulises Contreras. 2017. "Study of DC Ar–CO2mixture plasma using optical emission spectroscopy and mass spectrometry techniques." Physics of Plasmas 24, no. 4: 043508.
The variations in the physical and chemical parameters involved in the degradation of dye Acid Black 52 (AB52) using plasma were analyzed. The plasma, or electrical discharge, was generated in the gas–liquid interface at atmospheric pressure using a dc power supply. The system configuration comprised two tungsten electrodes: the cathode is immersed in the solution while the anode is fixed above the surface with a gap of 5 mm, where the plasma is generated. The absorbance, total organic carbon, chemical oxygen demand, pH variation, electrical conductivity, optical emission spectrum, and the change in volume and temperature were measured for each sample as a function of treatment time.
Josefina Vergara Sanchez; Cesar Torres Segundo; Esteban Montiel Palacios; Aaron Gomez Diaz; Pedro Guillermo Reyes Romero; Horacio Martinez Valencia. Degradation of Textile Dye AB 52 in an Aqueous Solution by Applying a Plasma at Atmospheric Pressure. IEEE Transactions on Plasma Science 2017, 45, 479 -484.
AMA StyleJosefina Vergara Sanchez, Cesar Torres Segundo, Esteban Montiel Palacios, Aaron Gomez Diaz, Pedro Guillermo Reyes Romero, Horacio Martinez Valencia. Degradation of Textile Dye AB 52 in an Aqueous Solution by Applying a Plasma at Atmospheric Pressure. IEEE Transactions on Plasma Science. 2017; 45 (3):479-484.
Chicago/Turabian StyleJosefina Vergara Sanchez; Cesar Torres Segundo; Esteban Montiel Palacios; Aaron Gomez Diaz; Pedro Guillermo Reyes Romero; Horacio Martinez Valencia. 2017. "Degradation of Textile Dye AB 52 in an Aqueous Solution by Applying a Plasma at Atmospheric Pressure." IEEE Transactions on Plasma Science 45, no. 3: 479-484.
Ethanol plasma produced in low pressure with constant flux has been characterized in situ by optical emission spectroscopy (OES) and a Langmuir probe. From these methods, hydrogen and carbon monoxide are the main products from the ethanol decomposition in the plasma. In addition, C2, OH, CH, O2+, and $\text{H}_{\alpha }$ species were identified. The values obtained for electron density and temperatures were $1.26 \times 10^{18}~\text{m}^{-3}$ and 1.16 eV, respectively. The mass deposited (MD) on the electrode was analyzed by scanning electron microscopy and Fourier transform infrared spectroscopy (FT-IR) techniques. The morphology of the MD changes as a function of the discharge time from thin film to a cluster formation. The FT-IR results show that the main absorbance corresponds with C–H bonds, indicating that the mass deposit is formed mainly by this molecular fraction, which agrees with the CH species identified as the less abundant molecule in the plasma by OES. In addition, $\text{C}\equiv \text{C}$ , O–H, C–H, C=C, and C–O bonds were identified.
P. G. Reyes; A. Gomez; Horacio Martinez; O. Flores; Cesar Torres; J. Vergara. Characterization of Ethanol Plasma Glow Discharge, Decomposition in Several Species and Solid Film Formation. IEEE Transactions on Plasma Science 2016, 44, 1 -6.
AMA StyleP. G. Reyes, A. Gomez, Horacio Martinez, O. Flores, Cesar Torres, J. Vergara. Characterization of Ethanol Plasma Glow Discharge, Decomposition in Several Species and Solid Film Formation. IEEE Transactions on Plasma Science. 2016; 44 (12):1-6.
Chicago/Turabian StyleP. G. Reyes; A. Gomez; Horacio Martinez; O. Flores; Cesar Torres; J. Vergara. 2016. "Characterization of Ethanol Plasma Glow Discharge, Decomposition in Several Species and Solid Film Formation." IEEE Transactions on Plasma Science 44, no. 12: 1-6.
The aim of this study was to obtain data on the biodistribution of (64)CuCl2 in rats and to obtain estimates of the radiation doses to humans by extrapolating the animal data. MicroPET imaging and biodistribution studies were carried out with Wistar rats, and the doses were estimated with OLINDA/EXM. The lower large intestine wall was found to be the critical organ with an absorbed dose of 139±34 and 125±32µGy/MBq for females and males, respectively. The corresponding effective doses were estimated as 47±4 and 39±4µSv/MBq.
Juan C Manrique-Arias; Jhonatan Carrasco; Pedro G. Reyes; Miguel A. Ávila-Rodríguez. Biodistribution in rats and estimates of doses to humans from 64CuCl2, a potential theranostic tracer. Applied Radiation and Isotopes 2016, 115, 18 -22.
AMA StyleJuan C Manrique-Arias, Jhonatan Carrasco, Pedro G. Reyes, Miguel A. Ávila-Rodríguez. Biodistribution in rats and estimates of doses to humans from 64CuCl2, a potential theranostic tracer. Applied Radiation and Isotopes. 2016; 115 ():18-22.
Chicago/Turabian StyleJuan C Manrique-Arias; Jhonatan Carrasco; Pedro G. Reyes; Miguel A. Ávila-Rodríguez. 2016. "Biodistribution in rats and estimates of doses to humans from 64CuCl2, a potential theranostic tracer." Applied Radiation and Isotopes 115, no. : 18-22.
Pedro Reyes; Cesar Torres; J Torres; A Gómez; Horacio Martinez; J Vergara. Electrical and optical characterization of CO2/He glow discharge. Journal of Physics: Conference Series 2015, 591, 1 .
AMA StylePedro Reyes, Cesar Torres, J Torres, A Gómez, Horacio Martinez, J Vergara. Electrical and optical characterization of CO2/He glow discharge. Journal of Physics: Conference Series. 2015; 591 ():1.
Chicago/Turabian StylePedro Reyes; Cesar Torres; J Torres; A Gómez; Horacio Martinez; J Vergara. 2015. "Electrical and optical characterization of CO2/He glow discharge." Journal of Physics: Conference Series 591, no. : 1.
S Perusquía; F Castillo; P G Reyes; Horacio Martinez. Study of the Rogowski coil response in a plasma focus device. Journal of Physics: Conference Series 2015, 591, 012028 .
AMA StyleS Perusquía, F Castillo, P G Reyes, Horacio Martinez. Study of the Rogowski coil response in a plasma focus device. Journal of Physics: Conference Series. 2015; 591 ():012028.
Chicago/Turabian StyleS Perusquía; F Castillo; P G Reyes; Horacio Martinez. 2015. "Study of the Rogowski coil response in a plasma focus device." Journal of Physics: Conference Series 591, no. : 012028.
M Villa; O Flores; F Castillo; Pedro Reyes; Horacio Martinez. Study of N2/He DC glow discharge. Journal of Physics: Conference Series 2015, 591, 012067 .
AMA StyleM Villa, O Flores, F Castillo, Pedro Reyes, Horacio Martinez. Study of N2/He DC glow discharge. Journal of Physics: Conference Series. 2015; 591 ():012067.
Chicago/Turabian StyleM Villa; O Flores; F Castillo; Pedro Reyes; Horacio Martinez. 2015. "Study of N2/He DC glow discharge." Journal of Physics: Conference Series 591, no. : 012067.
L Hernández; L A Mandujano; J Cuevas; Pedro Reyes; Daniel Osorio González. Analysis of green fluorescent protein bioluminescence in vivo and in vitro using a glow discharge. Journal of Physics: Conference Series 2015, 591, 012068 .
AMA StyleL Hernández, L A Mandujano, J Cuevas, Pedro Reyes, Daniel Osorio González. Analysis of green fluorescent protein bioluminescence in vivo and in vitro using a glow discharge. Journal of Physics: Conference Series. 2015; 591 ():012068.
Chicago/Turabian StyleL Hernández; L A Mandujano; J Cuevas; Pedro Reyes; Daniel Osorio González. 2015. "Analysis of green fluorescent protein bioluminescence in vivo and in vitro using a glow discharge." Journal of Physics: Conference Series 591, no. : 012068.
S Villalobos; F Castillo; O Flores; Pedro Reyes; Horacio Martinez. Optical and electrical characterization of C3H6O/Ar glow discharge. Journal of Physics: Conference Series 2015, 591, 012063 .
AMA StyleS Villalobos, F Castillo, O Flores, Pedro Reyes, Horacio Martinez. Optical and electrical characterization of C3H6O/Ar glow discharge. Journal of Physics: Conference Series. 2015; 591 ():012063.
Chicago/Turabian StyleS Villalobos; F Castillo; O Flores; Pedro Reyes; Horacio Martinez. 2015. "Optical and electrical characterization of C3H6O/Ar glow discharge." Journal of Physics: Conference Series 591, no. : 012063.
Pedro Reyes; A Gómez; Cesar Torres; Horacio Martinez; F Castillo; J Vergara. Striations in an ethyl alcohol glow discharge. Journal of Physics: Conference Series 2015, 591, 1 .
AMA StylePedro Reyes, A Gómez, Cesar Torres, Horacio Martinez, F Castillo, J Vergara. Striations in an ethyl alcohol glow discharge. Journal of Physics: Conference Series. 2015; 591 ():1.
Chicago/Turabian StylePedro Reyes; A Gómez; Cesar Torres; Horacio Martinez; F Castillo; J Vergara. 2015. "Striations in an ethyl alcohol glow discharge." Journal of Physics: Conference Series 591, no. : 1.
In this paper, the addition of Ar to H 2 is experimentally investigated. This paper primarily aims to observe the effects that this addition has on the intensity of hydrogen emission lines in a glow discharge mixture. The total pressure was 3 torr, at a power level of 3.9 W. Optical emission spectroscopy was used for plasma characterization, and the principal species observed were H γ (434 nm), H β (486.1 nm), H α (656.3 nm), and H 2 (603.1 nm), and Ar I (750.5 nm), Ar I (763.5 nm), and Ar I (811.6 nm). The electron temperature and ion density were determined by a double Langmuir probe. The electron temperature was found to be in the range of 2.5-6.5 eV, and the ion concentration was on the order of 109 cm -3 .
Juana Torres; Pedro Guillermo Reyes; Cesar Torres; Horacio Martinez; Josefina Vergara. Optical Emission Spectroscopy of H $_{\mathrm {\gamma }}$ , H $_{\mathrm {\alpha }}$ , and H $_{\mathrm {\beta }}$ in a Glow Discharge Mixture of Ar/H2. IEEE Transactions on Plasma Science 2015, 43, 846 -850.
AMA StyleJuana Torres, Pedro Guillermo Reyes, Cesar Torres, Horacio Martinez, Josefina Vergara. Optical Emission Spectroscopy of H $_{\mathrm {\gamma }}$ , H $_{\mathrm {\alpha }}$ , and H $_{\mathrm {\beta }}$ in a Glow Discharge Mixture of Ar/H2. IEEE Transactions on Plasma Science. 2015; 43 (3):846-850.
Chicago/Turabian StyleJuana Torres; Pedro Guillermo Reyes; Cesar Torres; Horacio Martinez; Josefina Vergara. 2015. "Optical Emission Spectroscopy of H $_{\mathrm {\gamma }}$ , H $_{\mathrm {\alpha }}$ , and H $_{\mathrm {\beta }}$ in a Glow Discharge Mixture of Ar/H2." IEEE Transactions on Plasma Science 43, no. 3: 846-850.
L Salazar-Flores; C Torres-Segundo; Pedro Reyes; F Castillo; Horacio Martinez. Low-pressure plasma discharge of Ar/N2/CH4ternary mixture: experimental simulation of Titan's atmosphere. Journal of Physics: Conference Series 2014, 511, 1 .
AMA StyleL Salazar-Flores, C Torres-Segundo, Pedro Reyes, F Castillo, Horacio Martinez. Low-pressure plasma discharge of Ar/N2/CH4ternary mixture: experimental simulation of Titan's atmosphere. Journal of Physics: Conference Series. 2014; 511 ():1.
Chicago/Turabian StyleL Salazar-Flores; C Torres-Segundo; Pedro Reyes; F Castillo; Horacio Martinez. 2014. "Low-pressure plasma discharge of Ar/N2/CH4ternary mixture: experimental simulation of Titan's atmosphere." Journal of Physics: Conference Series 511, no. : 1.
Cesar Torres; Pedro Reyes; Jorge Mulia; F Castillo; Horacio Martinez. Analysis Of The Different Zones Of Glow Discharge Of Ethyl Alcohol (C2H6O). Journal of Physics: Conference Series 2014, 511, 1 .
AMA StyleCesar Torres, Pedro Reyes, Jorge Mulia, F Castillo, Horacio Martinez. Analysis Of The Different Zones Of Glow Discharge Of Ethyl Alcohol (C2H6O). Journal of Physics: Conference Series. 2014; 511 ():1.
Chicago/Turabian StyleCesar Torres; Pedro Reyes; Jorge Mulia; F Castillo; Horacio Martinez. 2014. "Analysis Of The Different Zones Of Glow Discharge Of Ethyl Alcohol (C2H6O)." Journal of Physics: Conference Series 511, no. : 1.
A Gómez; L Salazar-Flores; Horacio Martinez; Pedro Reyes; F Castillo. Experimental study of a glow discharge of CH2-C12. Journal of Physics: Conference Series 2014, 511, 1 .
AMA StyleA Gómez, L Salazar-Flores, Horacio Martinez, Pedro Reyes, F Castillo. Experimental study of a glow discharge of CH2-C12. Journal of Physics: Conference Series. 2014; 511 ():1.
Chicago/Turabian StyleA Gómez; L Salazar-Flores; Horacio Martinez; Pedro Reyes; F Castillo. 2014. "Experimental study of a glow discharge of CH2-C12." Journal of Physics: Conference Series 511, no. : 1.
M Villa; Cesar Torres; Pedro Reyes; D Osorio; F Castillo; Horacio Martinez. Characterization a low pressure of plasma of methanol (CH4O) alcohol. Journal of Physics: Conference Series 2014, 511, 1 .
AMA StyleM Villa, Cesar Torres, Pedro Reyes, D Osorio, F Castillo, Horacio Martinez. Characterization a low pressure of plasma of methanol (CH4O) alcohol. Journal of Physics: Conference Series. 2014; 511 ():1.
Chicago/Turabian StyleM Villa; Cesar Torres; Pedro Reyes; D Osorio; F Castillo; Horacio Martinez. 2014. "Characterization a low pressure of plasma of methanol (CH4O) alcohol." Journal of Physics: Conference Series 511, no. : 1.
O. Flores; F. Castillo; Horacio Martinez; M. Villa; S. Villalobos; Pedro Reyes. Characterization of direct current He-N2 mixture plasma using optical emission spectroscopy and mass spectrometry. Physics of Plasmas 2014, 21, 053502 .
AMA StyleO. Flores, F. Castillo, Horacio Martinez, M. Villa, S. Villalobos, Pedro Reyes. Characterization of direct current He-N2 mixture plasma using optical emission spectroscopy and mass spectrometry. Physics of Plasmas. 2014; 21 (5):053502.
Chicago/Turabian StyleO. Flores; F. Castillo; Horacio Martinez; M. Villa; S. Villalobos; Pedro Reyes. 2014. "Characterization of direct current He-N2 mixture plasma using optical emission spectroscopy and mass spectrometry." Physics of Plasmas 21, no. 5: 053502.
A DC glow discharge produced in N2 gas can generate several species that are important in different applications, such as the modification of surface properties of materials. A low-pressure glow discharge apparatus was used for the the analysis of the Ar–N2 mixture at a total pressure of 2.0 Torr, a power of 20 W and 40 l/min flow rate of gases. The emission bands were measured in the wavelength range of 200–1100 nm. The principal elements are N2, N 2+ and Ar I. The electron temperature was found in the range of 1.72–2.08 eV, and the ion density was in the order of 1010 cm−3.
P.G. Reyes; Cesar Torres; Horacio Martinez. Electron temperature and ion density measurements in a glow discharge of an Ar–N2mixture. Radiation Effects and Defects in Solids 2013, 169, 285 -292.
AMA StyleP.G. Reyes, Cesar Torres, Horacio Martinez. Electron temperature and ion density measurements in a glow discharge of an Ar–N2mixture. Radiation Effects and Defects in Solids. 2013; 169 (4):285-292.
Chicago/Turabian StyleP.G. Reyes; Cesar Torres; Horacio Martinez. 2013. "Electron temperature and ion density measurements in a glow discharge of an Ar–N2mixture." Radiation Effects and Defects in Solids 169, no. 4: 285-292.