Academicos UTA participaron en analisis del genoma de nativos Americanos

Genomic evidence for the Pleistocene and recent population history of Native Americans. Créditos Fotografía: Nacho Calonge How and when the Americas were populated remains contentious. Using ancient and modern genome-wide data, we found that the ancestors of all present-day Native Americans, including Athabascans and Amerindians, entered the Americas as a single migration wave from Siberia…

Cuando la apnea del sueño, mejora la presión arterial

Patent Foramen Ovale Closure in Obstructive Sleep Apnea Improves Blood Pressure and Cardiovascular Function. Obstructive sleep apnea (OSA) is a frequent syndrome characterized by intermittent hypoxemia and increased prevalence of arterial hypertension and cardiovascular morbidity. In OSA, the presence of patent foramen ovale (PFO) is associated with increased number of apneas and more severe oxygen…

Importancia de un buen discurso en las políticas de salud pública

Othering the Chronically Ill: A Discourse Analysis of New Zealand Health Policy Documents. It is widely recognized that chronic illnesses pose significant challenges for health care systems around the world. In response, most governments have set health policies in order to manage (or better, reduce) demand and improve the health of their populations. A discourse…

ADN mitocondrial del extinto caballo americano en Chile permite separarlo de los equinos

Mitochondrial genomes reveal the extinct Hippidion as an outgroup to all living equids. Hippidions were equids with very distinctive anatomical features. They lived in South America 2.5 million years ago (Ma) until their extinction approximately 10 000 years ago. The evolutionary origin of the three known Hippidion morphospecies is still disputed. Based on palaeontological data,…

El poco conocido reptil Liolaemus silvai, su variación fenotípica, filogenia y ampliación distribucional.

Phenotypic Variation, Phylogenetic Position and New Distributional Records for the Poorly Known Liolaemus silvai Ortiz, 1989 (Iguania: Iguanidae: Liolaemini)   Liolaemus silvai is a poorly known species of the L. nigromaculatus group. Currently, its distribution is restricted to the type locality (Carrizalillo, Atacama Region, Chile) and despite being a highly variable species no study has…

Análisis de bacterias fotosintéticas en restos volcánicos del desierto, por investigadores españoles.

Ignimbrite textural properties as determinants of endolithic colonization patterns from hyper-arid Atacama Desert. This study explores the photosynthetic microbial colonization of rhyolitic ignimbrites in Lomas de Tilocalar, a hyper-arid region of the Atacama Desert, Chile. Colonization appeared in the form of a green layer a few millimeters beneath the ignimbrite surface. Some ignimbrite rocks revealed…

Científicos UA aislan compuestos medicinales de la llareta altiplánica

Isolation of cytotoxic diterpenoids from the Chilean medicinal plant Azorella compacta Phil from the Atacama Desert by high-speed counter-current chromatography. Azorella compacta (Apiaceae) is a native Chilean cushion shrub which produces a resin containing mulinane and azorellane diterpenoids. This plant has been used since pre-Colombian times to treat inflammation and dental neuralgias. In this work…

Nueva cepa de Microbacterium aislada del Desierto de Atacama, por Investigadores Chilenos.

Complete genome sequence of Microbacterium sp. CGR1, bacterium tolerant to wide abiotic conditions isolated from the Atacama Desert. Microbacterium sp. CGR1 (RGM2230) is an isolate from the Atacama Desert that displays a wide pH, salinity and temperature tolerance. This strain exhibits riboflavin overproducer features and traits for developing an environmental arsenic biosensor. Here, we report…