CHEMICAL COMPONENTS OF HEARTWOOD IN Andira inermis (W. Wright) DC. (Leguminosae)

Abstract

Se realizó un análisis químico del duramen de Andira inermis para determinar los principales componentes químicos. Los resultados encontrados fueron: pH de 5.9, 0.71 % de sustancias inorgánicas, 19.1 % de sustancias extraíbles, 34.2 % de lignina y 65.78 % de polisacáridos. En las cenizas se detectó la presencia de calcio, magnesio, azufre y silicio. Las sustancias fueron obtenidas mediante extracción sucesiva con ciclohexano, cloroformo, acetona y metanol en equipo Soxhlet y finalmente con agua caliente bajo reflujo. La solubilidad del duramen fue mayor en acetona (8.6 %) y en metanol (5.3 %); el contenido total de sustancias extraíbles fue de 19.1 %.

Chemical composition of biomass generated in the guava tree pruning

“…Mineral content was calculated gravimetrically in accordance with the TAPPI standard, T 211 om-93 (TAPPI, 2000[ 36 ]). Microanalysis of the ash was carried out with an X-ray spectrometer fitted to a Jeol-brand scanning electron microscope (Model JSM-6400) five times and the operating conditions for the analysis were 20 kV and 8.5 s (Téllez-Sánchez et al, 2010[ 37 ]). To determine the total content of extractives, sequential extractions were performed with a Soxhlet apparatus using the following solvents: cyclohexane, acetone, methanol, and finally, hot water under reflux (6 h in each case).…”

Kraft pulping and bleaching of Eichhornia crassipes (Mart.) Solms (water hyacinth)

“…Determination of inorganic elements in brown pulp ash and in ash after each stage of the bleaching process was performed using an X-ray spectrometer, connected to a Jeol JSM -6400 scanning electron microscope (Tokyo, Japan), with operating conditions of 20 kV and 8.5s (Téllez-Sánchez et al 2010).…”

Wood chemical composition of five tree species from Oaxaca, Mexico

“…Bautista and Honorato (2005) studied the wood of four Quercus species. Bárcenas-Pazos et al (2008) focused on the chemical composition of two shrub species of white oak; Téllez-Sánchez et al (2010) researched the heartwood components of Andira inermes (W. Wright); and Honorato-Salazar et al (2015) examined the main chemical components of the wood of Ceiba pentandra, Hevea brasiliensis, and Ochroma pyramidale. Recently, Herrera-Fernández et al (2017) reported on the chemical composition of wood and bark of three oak species.…”