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Title: PMS and ZAMS stars associated with the dark cloud LDN 1655
Author: Flores-Hernandez, M.A.
Gonzalez, I.R.
Lomeli-Ramirez, M.G.
Fuentes-Talavera, F.J.
Silva-Guzman, J.A.
Cerpa-Gallegos, M.A.
García-Enriquez, S.
Issue Date: 2014
Abstract: This study examines the effect of particle size and wood flour content on the properties of polystyrene filled with white oak flour. Wood-plastic ratios 10:90, 30:70 and 50:50% (wt/wt) and particle size 40, 50, 65 and 100 mesh were used. Tensile, bending and impact bending strength as well as the melt flow index were evaluated. Additionally, composite density and water absorption capacity were also tested. Scanning electronic microscopy revealed good adhesion between wood particles and polystyrene. Results show that mechanical properties are strongly influenced by wood flour content and particle size. A reduction in tensile module, elongation and deflection were observed, however, the bending module was increased. Impact strength increased with particle size and content. Melt flow index values are reduced with the increasing amount of filler content while water absorption increases with the amount of wood particles. " The Author(s) 2012.",,,,,,"10.1177/0021998312470149",,,"","",,,,,,"2",,"Journal of Composite Materials",,"209
WOS",,,,,,"mechanical properties; melt flow index; polystyrene; water absorption; white oak flour; Wood-plastic composites",,,,,,"Physical and mechanical properties of wood plastic composites polystyrene-white oak wood flour",,"Article" "45453","123456789/35008",,"Chavarría-K, C., Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B.C. 22860, Mexico; Moreno-Corral, M.A., Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B.C. 22860, Mexico; De Lara, E., Instituto de Astronomía, Universidad Nacional Autónoma de México, Ensenada, B.C. 22860, Mexico; De La Fuente, E., Departamento de Física CUCEI, Universidad de Guadalajara, Guadalajara-Jalisco, Mexico",,"Chavarria-K, C.
Moreno-Corral, M.A.
De Lara, E.
De La Fuente, E.",,"2013",,"We give results of a low-resolution optical spectroscopic study of the bright nebulous stars conforming the tight stellar trapezium embedded in IRAS06548-0815, of the exciting star of IRAS06547-0810, and of the stars associated with reflection nebulae (R-or N-stars) NJ065703.0-081421, NJ065714.1-081016, IRAS06548-0815 D and IRAS06548-0815 G, all objects scarcely observed and apparently pertaining to the dark cloud LDN 1655. Our results given here combined with the corresponding 2MASS near infrared photometry enables us to estimate a photometric distance to LDN1655 of 1.9 kpc and to locate the trapezium stars on the (log L*L ?,log Teff) or HR diagram in an attempt to disclose about their true nature. The spectroscopy of IRAS06548-0815 revealed two classic T Tauri, two Herbig Ae/Be stars, four weak-line T Tauri stars, and two probable lithium-rich stars. Additionally, we found that the R-star IRAS06547-0810 is excited by a single B1(V) star, that IRAS06548-0815 D is excited by a SpT. B2/B3(V) star, NJ065703.0-081421 and NJ065714.1-081016 are excited by a B3/B4(V) emission star and an A6(V) star, respectively. The brightest near infrared source of the trapezium, IRS1, has an infrared luminosity comparable to a highly reddened O8(V) star ( AV?29 m). The second brightest near infrared source of the trapezium, IRAS06548-0815 C is, optically, a single classical T Tauri star of spectral type K4/K5, but is a resolved binary in the 2MASS K s band, both components being of about the same brightness. " 2012 Elsevier B.V. All rights reserved.
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