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187 results on '"Martínez, Mahinda"'

28. Chemical Constituents of the Mexican Mistletoe (Psittacanthus calyculatus)

Author

Castañeda-Moreno Raquel, Martínez Mahinda, Bah Moustapha, Gutiérrez-Avella Dora Marina, and Fuentes-Ordaz Raúl

Subjects
Psittacanthus calyculatus, isorhamnetin bioside, quercetin bioside, trans-4-hydroxy-N-methylproline, NMR, Organic chemistry, QD241-441
Abstract

A phytochemical study of the methanol-soluble fraction of an aqueous extract of a sample of Psittacanthus calyculatus collected from the host plant Prosopsis laevigata (Smooth Mesquite) using several techniques, including co-chromatography coupled with UV detection, chromatographic purifications and IR, NMR and MS studies, resulted in the identification of gallic acid, two flavonol-3-biosides and the nonprotein amino acid N-methyl-trans-4-hydroxy-L-proline.

Published
2011
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33. Extinction risk of Mesoamerican crop wild relatives

Author

Goettsch, Bárbara, primary, Urquiza‐Haas, Tania, additional, Koleff, Patricia, additional, Acevedo Gasman, Francisca, additional, Aguilar‐Meléndez, Araceli, additional, Alavez, Valeria, additional, Alejandre‐Iturbide, Gabriel, additional, Aragón Cuevas, Flavio, additional, Azurdia Pérez, César, additional, Carr, Jamie A., additional, Castellanos‐Morales, Gabriela, additional, Cerén, Gabriel, additional, Contreras‐Toledo, Aremi R., additional, Correa‐Cano, María Eugenia, additional, De la Cruz Larios, Lino, additional, Debouck, Daniel G., additional, Delgado‐Salinas, Alfonso, additional, Gómez‐Ruiz, Emma P., additional, González‐Ledesma, Manuel, additional, González‐Pérez, Enrique, additional, Hernández‐Apolinar, Mariana, additional, Herrera‐Cabrera, Braulio E., additional, Jefferson, Megan, additional, Kell, Shelagh, additional, Lira‐Saade, Rafael, additional, Lorea‐Hernández, Francisco, additional, Martínez, Mahinda, additional, Mastretta‐Yanes, Alicia, additional, Maxted, Nigel, additional, Menjívar, Jenny, additional, de los Ángeles Mérida Guzmán, María, additional, Morales Herrera, Aura J., additional, Oliveros‐Galindo, Oswaldo, additional, Orjuela‐R., M. Andrea, additional, Pollock, Caroline M., additional, Quintana‐Camargo, Martín, additional, Rodríguez, Aarón, additional, Ruiz Corral, José Ariel, additional, Sánchez González, José de Jesús, additional, Sánchez‐de la Vega, Guillermo, additional, Superina, Mariella, additional, Tobón Niedfeldt, Wolke, additional, Tognelli, Marcelo F., additional, Vargas‐Ponce, Ofelia, additional, Vega, Melania, additional, Wegier, Ana, additional, Zamora Tavares, Pilar, additional, and Jenkins, Richard K. B., additional

Published
2021
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39. Elemenolides from Zinnia peruviana and evaluation of their antibacterial and α-glucosidase inhibitory activities.

Author

González, Ulises, Morales-Jiménez, Jesús, Nieto-Camacho, Antonio, Martínez, Mahinda, and Maldonado, Emma

Subjects
BACILLUS subtilis, STAPHYLOCOCCUS aureus, DATA analysis, SESQUITERPENE lactones
Abstract

A phytochemical study from Zinnia peruviana L. resulted in the isolation of a new elemene-type sesquiterpene lactone, zinaflorin VI (1), along with the known elemenolides 2–5 and the flavone onopordin (6). The structures of these compounds were determined by analysis of their spectroscopic data. The antibacterial activity of the γ-elemenolides 1, 4, and 5 was evaluated. The δ-elemenolide juniperin (7), previously isolated from Zinnia juniperifolia, was included in this assay. Compounds 1 and 7 were active against Bacillus subtilis and Staphylococcus aureus with MICs = 32 and 64 µg/mL for compound 1 and MICs = 4 and 8 µg/mL for compound 7. The α-glucosidase inhibitory activity of compounds 1, and 4–7 was evaluated, but none of these compounds was found to be active. [ABSTRACT FROM AUTHOR]

Published
2021
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41. Plantas ornamentales tóxicas en Venezuela

Author

Varela Romero, Carlos, Vizcarrondo, Guillermo, and Martínez, Mahinda

Subjects
planta tóxica, planta ornamental, economic botany, botánica económica, ornamental plant, toxic plant, Biodiversity, Venezuela, Biodiversidad
Abstract

El objetivo de esta investigación fue aportar información sobre las plantas ornamentales tóxicas en Venezuela. Se recopiló información en catálogos, libros, artículos y se revisaron colecciones de herbarios. Se realizó un análisis botánico (taxonomía, nombres comunes, hábito, origen, estatus, ubicación, propagación) y toxicológico (parte de la planta, efectos). Se solicitó información de casos por intoxicación de plantas al SIMET (Facultad de Farmacia-UCV). Se encontraron 78 especies en 34 familias, las más importantes fueron: Apocynaceae (10 géneros/12 especies), Araceae (9/9), Euphorbiaceae (4/10) y Solanaceae (5/6). Euphorbia fue el género con mayor número de especies (6). La mayoría de las especies resultaron exóticas (79,5%) y arbustivas (32,1%). Toda la planta (35) y el látex (19) fueron las partes más tóxicas y la ingestión accidental más frecuente (61,5%). Se registraron 20 casos entre 2009-2013, el 80% fueron menores de edad, sexo femenino y zonas urbanas. Existe poca información publicada en países de Hispanoamérica. The aim of this research was to contribute information on toxic ornamental plants in Venezuela. Information on taxonomy, common names, habit, origin, status, location, propagation and toxicology (part of the plant, effects) was compiled from articles, books, catalogs, herbarium collections. A botanical analysis (taxonomy, common names, habit, origin, status, location, propagation) and toxicology (part of the plant, effects) was performed. The information about plant poisoning cases was requested to SIMET (Pharmacy faculty -UCV). Seventy-eight species were found in 34 families, the most important were: Apocynaceae (10 genera/12 species), Araceae (9/9), Euphorbiaceae (4/10) and Solanaceae (5/6). Genus Euphorbia was the most species rich. Most species were exotic species (79.5%) and shrubs (32.1%). The entire plant (35) and latex (19) were the most toxic parts and the most frequent accidental ingestion (61.5%). Twenty cases were reported between 2009-2013, of which 80% were minors, female and urban areas. There is very little information published in Hispanic American countries.

Published
2017

47. Solanceae family in Mexico

Author

Martínez, Mahinda, primary, Vargas-Ponce, Ofelia, additional, Rodríguez, Aarón, additional, Chiang, Fernando, additional, and Ocegueda, Susana, additional

Published
2017
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