Results 81 to 90 of about 18,668 (186)

Estrategias para la Conservación y Uso Sustentable de la Diversidad Biológica

open access: yes, 2019
Está investigación tuvo como propósito desarrollar estrategias para la conservación y uso sustentable de la diversidad biológica en la Escuela Técnica Agropecuaria Nacional (ETAN) “Don Simón Rodríguez”, del Municipio Pedraza del Estado Barinas.
Nixon Alexander Maldonado Valero   +2 more
core   +1 more source

Improving the clinical trial landscape for patients with atypical variants of Alzheimer's disease: a call to action

open access: yesAlzheimer's &Dementia, Volume 22, Issue 6, June 2026.
Abstract Patients with atypical variants of Alzheimer's disease (AD) often present at a younger age with predominantly non‐amnestic impairments and a more aggressive disease course. Historically, individuals with atypical presentations have not been included in large‐scale clinical trials, which typically focus on late‐onset, sporadic amnestic ...
Nick Corriveau‐Lecavalier   +36 more
wiley   +1 more source

Enseñanza e investigación bioantropológica en la Argentina

open access: yes, 2005
La información para la elaboración de esta ponencia se obtuvo a partir de: I) encuestas realizadas a los docentes e investigadores que en la Argentina desarrollan sus actividades dentro del campo de la Antropología Biológica.
Carnese, Francisco R.
core  

Herbarium Areqvipense (HUSA): computerization and representativeness of its collection

open access: yesRevista Peruana de Biología, 2012
Scientific collections and herbaria are essential sources of information and education for researchers and practitioners in biological sciences. The Herbarium Areqvipense (HUSA), registered at Index Herbariorum since 2004, holds one of the most important
Italo F. Treviño   +7 more
doaj   +1 more source

White matter hyperintensities are associated with locus coeruleus atrophy and astrocytic β2‐adrenergic receptor expression

open access: yesAlzheimer's &Dementia, Volume 22, Issue 6, June 2026.
Abstract INTRODUCTION White matter hyperintensities (WMHs) are a robust marker of brain aging and dementia risk, typically attributed to vascular pathology. However, impaired astrocytic support may also contribute. The locus coeruleus (LC), which degenerates early in aging and Alzheimer's disease, provides widespread noradrenergic projections that ...
Victor Vidal   +16 more
wiley   +1 more source

Reflexiones sobre la ética en la investigación antropológica

open access: yes, 2008
La preocupación formal de la ética en la investigación científica tiene el primer hito histórico en la promulgación del Código de Nürenberg en 1947 surgido como reacción a los abusos cometidos por los médicos nazis en la segunda guerra Mundial.
Caratini, Alicia Liliana
core  

Investigación en la escuela

open access: yes, 1990
Resumen tomado de la revistaAnaliza el conocimiento profesional y escolar en torno a la evolución biológica. Para ello se formulan en primer lugar unas dimensiones de análisis desde una perspectiva crítica que cuestiona la tendencia dominante ...
Rivero García, Ana   +2 more
core   +1 more source

Semisynthesis of Betaxanthins from Purified Betacyanin of Opuntia dillenii sp.: Color Stability and Antiradical Capacity

open access: yesMolecules
The availability of pure individual betalains in sufficient quantities which permit deeper understanding is still a challenge. This study investigates the high-yielding semisynthesis of betaxanthins using betalamic acid from a natural source (Opuntia ...
Silvia Cruz   +5 more
doaj   +1 more source

Wild Seasons, Urban Stasis: Anthropogenic Food Subsidies Buffer Seasonal Dietary Shifts for Coyotes (Canis latrans) in a Wildland‐Urban Landscape South of Mexico City

open access: yesEcology and Evolution, Volume 16, Issue 6, June 2026.
Coyote populations are expanding into urban areas, and this study examines how their diet adapts along a gradient from conserved to human‐modified habitats. Mammals dominated the diet at both sites, and there was no significant difference in annual dietary diversity between the conserved and modified areas.
Andrés Arias‐Alzate   +4 more
wiley   +1 more source

En la investigación con animales de laboratorio, Colombia debe acogerse a los acuerdos internacionales

open access: yesRevista Colombiana de Biotecnología, 1999
Cuando se realiza investigación en un marco pleno de ética  y se mantiene el bienestar de los animales, la calidad de la ciencia y los datos que se deriven del trabajo serán lo mejor que se puede lograr.
A. Mrad, C. A. Cardozo
doaj   +2 more sources

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