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SUPERBUBBLES AS SPACE BAROMETERS
GARCIA-SEGURA G.,OEY M. S. The Korean Astronomical Society 2004 Journal of The Korean Astronomical Society Vol.37 No.4
High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous ob-served growth-rate discrepancy for supernova-driven super bubbles and stellar wind bubbles. Pressures of P / k ${\~} 10^5\;cm^{-3}$ K are plausible for regions with high star formation rates, and these values are intermediate between the estimated Galactic mid-plane pressure and those observed in starburst galaxies. High-pressure components also are commonly seen in Galactic ISM localizations. We demonstrate the sensitivity of shell growth to the ambient pressure, and suggest that super bubbles ultimately might serve as ISM barometers.
ADVANCES IN CIRCUMSTELLAR MEDIUM EVOLUTION
Garcia-Segura, Guillermo The Korean Astronomical Society 2007 Journal of The Korean Astronomical Society Vol.40 No.4
We discuss recent advances in hydrodynamical computations of the circumstellar medium, which are useful to understand some features observed in long gamma ray bursts.
SUPERBUBBLES AS SPACE BAROMETERS
G. GARCIA-SEGURA,M. S. OEY 한국천문학회 2004 Journal of The Korean Astronomical Society Vol.37 No.5
High ambient interstellar pressure is suggested as a possible factor to explain the ubiquitous ob-served growth-rate discrepancy for supernova-driven superbubbles and stellar wind bubbles. Pressuresof P/k~ 10^5 cm^-3 K are plausible for regions with high star formation rates, and these values areintermediate between the estimated Galactic mid-plane pressure and those observed in starburst galax-ies. High-pressure components also are commonly seen in Galactic ISM localizations. We demonstratethe sensitivity of shell growth to the ambient pressure, and suggest that superbubbles ultimately mightserve as ISM barometers.
Ponce-Garcia, Gustavo,Villanueva-Segura, Olga K.,Garza-Elizondo, Karina,Villegas-Ramirez, Heriberto M.,Fernandez-Salas, Ildefonso,Rodriguez-Sanchez, Iram P.,Dzul-Manzanilla, Felipe,Flores-Suarez, Adri The Korea Society for Parasitology and Tropical Me 2022 The Korean Journal of Parasitology Vol.60 No.3
The head louse Pediculus humanus capitis (De Geer) is a hematophagous ectoparasite that inhabits the human scalp. The infestations are asymptomatic; however, skin irritation from scratching occasionally may cause secondary bacterial infections. The present study determined the presence and frequency of the knockdown resistance (kdr) mutation T929I in 245 head lice collected from Mexico, Peru, and Canada. Head lice were collected manually using a comb in the private head lice control clinic. Allele mutation at T9291 was present in 100% of the total sampled populations (245 lice) examined. In addition, 4.89% of the lice were homozygous susceptible, whereas 6.93% heterozygous and 88.16% homozygous were resistant, respectively. This represents the second report in Mexico and Quebec and fist in Lima.
Electrochemical oxidation of methyl orange azo dye at pilot flow plant using BDD technology
Cecilia Ramırez,Juan M. Peralta-Hernandez,Adriana Saldana,Berenice Hernandez,Roberto Acero,Ricardo Guerra,Sergi Garcia-Segura,Enric Brillas 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.2
Solutions of methyl orange azo dye were degraded by electrochemical oxidation using a 3 L flow plant with a boron-doped diamond (BDD)/stainless steel cell operating at constant current density, ambient temperature and liquid flow rate of 12 L min-1. A 23 factorial design considering the applied current density, azo dye concentration and electrolysis time as variable independents was used to analyze the process by response surface methodology. LC–MS analysis revealed the formation of seven oxidation products from the cleavage of the –N55N– group of the dye, followed by deamination, formation of a nitro group and/or desulfonation of the resulting aromatics.