Results 41 to 50 of about 915,219 (362)

A case-crossover analysis to quantify the impact of wildfire smoke on hospital respiratory admissions in the Rogue Valley, Oregon

Public Health in Practice
Background: With the increasing prevalence of wildfire smoke in the Pacific Northwest, it is important to quantify health impacts to plan for adequate health services.
A Lee Mitchell, Kyle Chapman, Kerry Farris, Pooya Naderi, Ashley Hansen   +4 more
doaj   +1 more source

ANÁLISIS DE PARTÍCULAS SUSPENDIDAS TOTALES (PST) Y PARTÍCULAS FRACCIÓN RESPIRABLE (PM10), EN CUNDUACÁN, TABASCO

Ecosistemas y Recursos Agropecuarios, 2014
En la atmósfera del municipio de Cunduacán Tabasco se midió la concentración de partículas suspendidas totales (PST) y partículas fracción respirable (PM10).
H Pérez-Vidal, MA Lunagómez-Rocha, LI Acosta-Pérez   +2 more
doaj   +1 more source

Osteological correlates of the respiratory and vascular systems in the neural canals of Mesozoic ornithurines Ichthyornis and Janavis

The Anatomical Record, EarlyView.
Abstract In birds, the neural canal houses a variety of anatomical structures including the spinal cord, meninges, spinal vasculature, and respiratory diverticula. Among these, paramedullary diverticula and the extradural dorsal spinal vein may leave behind osteological correlates in the form of pneumatic foramina and fossae, and a bilobed geometry of ...
Jessie Atterholt, M. Grace Burton, Mathew J. Wedel, Juan Benito, Ellen Fricano, Daniel J. Field   +5 more
wiley   +1 more source

Desarrollo de las estructuras cognitivas del alumnado sobre el aire mediante actividades de investigación

Revista Eureka sobre Enseñanza y Divulgación de las Ciencias, 2020
Este estudio pretende examinar el desarrollo de las estructuras cognitivas del alumnado de 4º año, como resultado del uso de actividades de investigación, en la secuencia de clases que abordaban el concepto de aire. En el estudio han participado un total
Mónica Baptista, Iva Martins, Teresa Conceição, Carolina Pipitone   +3 more
doaj   +1 more source

Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)

The Anatomical Record, EarlyView.
Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto, João Felipe Leal Kaiuca, Adriana Itatí Olivares, William Corrêa Tavares   +3 more
wiley   +1 more source

El principio mitológico y el origen racional del concepto de “vacío” en la filosofía presocrática

Anales del Seminario de Historia de la Filosofía
La explicación tradicional del concepto de “vacío” (τò κενóν) en la filosofía antigua lo sitúa como una invención del atomismo de Demócrito y Leucipo o, incluso, del eleático Meliso de Samos.
Adrià Porta Caballe
doaj   +1 more source

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Impact of air pollution on the development of asthma

Revista Alergia México, 2015
Air pollution affects the origin and evolution of respiratory diseases. The increased frequency of asthma in recent years has been associated with growth air pollutants and small particles produced from the combustion of petroleum or cigarette smoke ...
Jorge Sánchez, Luis Caraballo
doaj   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

La Aviación Militar Española: una historia corta pero de gran intensidad

Arbor: Ciencia, Pensamiento y Cultura, 2002
En este artículo, su autor hace un recorrido histórico, excelentemente documentado, por toda la historia de la Aviación Militar Española, desde sus inicios, allá por 1910, hasta nuestros días.
José Sánchez Méndez
doaj   +1 more source