Results 51 to 60 of about 61,145,736 (147)

Antioxidant Activities of Pentacyclic Triterpenes From Melipona beecheii Propolis and Their Semisynthetic Derivatives

open access: yesChemistry &Biodiversity, Volume 23, Issue 9, September 2026.
M. beecheii propolis contains eleven identified PTs, including germanicone and glutinol, reported for the first time in this material. Antioxidant assays reveal Fe(III)‐reducing activity at an effective concentrations lower than DPPH radical‐scavenging activity.
Aarón Santana‐Hernández   +7 more
wiley   +1 more source

Hemotórax: etiología, diagnóstico, tratamiento y complicaciones

open access: yesRevista Biomédica, 2016
La sospecha de hemotórax inicia con una historia clínica adecuada, particularmente, el padecimiento actual, por ejemplo, casos con trauma torácico. El paso inicial de la evaluación, es diferenciar los derrames pleurales hemorrágicos de los verdaderos ...
Arturo Cortes-Telles   +2 more
doaj   +1 more source

Delineation of Flow Components in a Tropical Region With Carbonate Rocks of Southeastern Mexico

open access: yesHydrological Processes, Volume 40, Issue 9, September 2026.
Hydrochemistry and statistical methods help to delimit the flow components in carbonate rocks with marine intrusion. ABSTRACT This study analyses groundwater flow systems in a tropical karst aquifer of the Yucatán Peninsula, Mexico, where population growth and tourism are concerns due to increasing urbanisation.
Castro‐Zarate Martha Edith   +9 more
wiley   +1 more source

Desorganización social y delito en la Península de Yucatán. (2020).

open access: yes
En el presente libro se estudia la desorganización social y el delito en la Península de Yucatán, el objetivo es analizar la distribución del delito en el marco de la desorganización social en los municipios de la Península de Yucatán e identificar las ...
Cercas López, Enrique   +1 more
core   +1 more source

Presencia de Caulerpaceae (Chlorophyta) en la península de Yucatán, México

open access: yes, 2015
Veintitrés taxones de Caulerpaceae (4 especies, 3 variedades y 6 formas) se encontraron en 70 sitios a lo largo de las costas de la península de Yucatán, México. La macroalga invasora C. brachypus f. parvifolia se reporta por primera vez en Quintana Roo.
Julio Espinoza-Avalos   +9 more
core   +1 more source

La familia Icacinaceae en la Península de Yucatán, México [PDF]

open access: yes, 2008
A taxonomic treatment of the family Icacinaceae in the Yucatán Peninsula (Mexico) is presented including a description of the genus Ottoschulzia Urb., and information about the distribution of Ottoschulzia pallida Lundell the only know species in the ...
Gutiérrez Báez, Celso
core   +2 more sources

Comparison of body mass index range criteria and their association with cognition, functioning and depression: a cross-sectional study in Mexican older adults

open access: yesBMC Geriatrics, 2019
Background World population is living longer, demanding adjustments in public health policies. Body mass index (BMI) is widely known and used as a parameter and predictor of health status although an adapted criterion for older adults is usually ...
Damaris Francis Estrella-Castillo   +1 more
doaj   +1 more source

Antecedentes de los límites fronterizos en la península de Yucatán utilizando la cartografía histórica

open access: yesOficio, Revista de Historia e Interdisciplina, 2020
Desde que se constituyera, en 1902, por medio de decreto presidencial de Porfirio Díaz, el Territorio Federal de Quintana Roo en la parte oriental de la Península de Yucatán, tanto Campeche como Yucatán han pugnado en contra de esta decisión y se han ...
Ignacio Alonso Velasco
doaj   +1 more source

Low Denitrification, Anammox, and Dissimilatory Nitrate Reduction to Ammonium Rates in a Low Disturbance Mangrove‐Saltmarsh System Using an in Situ Intact Chamber Method

open access: yesJournal of Geophysical Research: Biogeosciences, Volume 131, Issue 9, September 2026.
Abstract Mangroves and saltmarshes can remove anthropogenic nitrogen (N) moving from the land to the ocean, but many previous N cycling measurements used destructive sampling procedures that excluded important habitats such as crab burrows, pneumatophores, and saltmarsh vegetation.
Britte C. van Haastregt   +3 more
wiley   +1 more source

Continental Islands: a model for the mainland Caribbean? The case of Yucatan

open access: yes, 2017
Resumen La Península de Yucatán, al extremo oriente de Mexico, suele ser representada  como “el país que no se parece a otro”, o incluso, como una isla.
Margaret Elisabeth Shrimpton Masson; FACULTAD DE CIENCIAS ANTROPOLÓGICAS, UNIVERSIDAD AUTÓNOMA DE YUCATÁN
core   +1 more source

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