Results 71 to 80 of about 7,816 (230)

Paleopteran molecular clock: Time drift and recent acceleration

open access: yesEcology and Evolution, Volume 14, Issue 9, September 2024.
Constant evolution rates, which form the foundation of the strict molecular clock model, do not apply in the case of Paleoptera, highlighting a notable bias in the molecular clock hypothesis. The current biodiversity may be the outcome of a relatively recent, exponential increase in base substitution rates.
Soichi Osozawa, André Nel
wiley   +1 more source

Investigando el “agujero de ozono” en la Patagonia Austral

open access: yesRevista de Enseñanza de la Física, 2010
En este trabajo se presenta una introducción al conocimiento del fenómeno de la drástica disminución en la concentración de ozono estratosférico en primavera, que se ha dado en llamar “agujero de ozono ...
Beatriz Milicic
doaj  

Absorción por ozono y dispersión por aire de la radiación solar ultravioleta B

open access: yesRevista U.D.C.A Actualidad & Divulgación Científica, 2011
Para los casos eventuales de falta de información experimental, se presenta una alternativa para poder disponer de datos confiables y validables de los coeficientes de absorción por ozono y de dispersión por aire puro de la radiación solar ultravioleta B
Julio César González Navarrete   +1 more
doaj   +1 more source

Global Consensus Recommendations on Prevention and Management of Nutritional Rickets

open access: yesHormone Research in Paediatrics, 2016
Background: Vitamin D and calcium deficiencies are common worldwide, causing nutritional rickets and osteomalacia, which have a major impact on health, growth, and development of infants, children, and adolescents; the consequences can be lethal or can ...
C. Munns   +32 more
semanticscholar   +1 more source

Clinical outcomes and medical management of achondroplasia in Japanese children: A retrospective medical record review of clinical data

open access: yesAmerican Journal of Medical Genetics Part A, Volume 194, Issue 8, August 2024.
Abstract Achondroplasia (ACH) is a rare, autosomal dominant skeletal dysplasia characterized by short stature, characteristic facial configuration, and trident hands. Before vosoritide approval in Japan, patients with ACH could start growth hormone (GH) treatment at age 3 years.
Hiroyuki Saitou   +17 more
wiley   +1 more source

Ozonización del aceite de girasol. Seguimiento de la reacción por Resonancia Magnética Nuclear protónica

open access: yesRevista CENIC Ciencias Químicas, 2005
Estudios previos han demostrado que la técnica de Resonancia Magnética Nuclear protónica puede ser utilizada para el seguimiento de la reacción entre el ozono y los ácidos grasos insaturados.
Maritza F. Díaz Gómez   +1 more
doaj  

Mejora de la calidad de las medidas de ozono mediante un fotómetro UV de referencia

open access: yesRevista de Salud Ambiental, 2001
La Directiva 92/72/CE hace referencia al método de análisis descrito en la UNE 77-221:2000 y a que los analizadores de ozono se deben calibrar con un fotómetro UV de referencia o con un patrón transferido.
C. Sánchez Blaya   +3 more
doaj   +2 more sources

Modelling the ozone penetration in a grain layer / Ozono skverbties grūdų sluoksnyje modeliavimas

open access: yesJournal of Environmental Engineering and Landscape Management, 2012
Studies of grain drying with ozone-air mixture were carried out to detect the ozone penetration patterns through the grain mound of various moisture content (14.6 ≤ w 0 ≤ 23.0%) at different ozone concentrations (500 ≤ C 0 ≤ 1250 ppb) in the supplied air.
Aušra Steponavičienė   +3 more
doaj   +1 more source

Role of Metacognitive Confidence Judgments in Curiosity: Different Effects of Confidence on Curiosity Across Epistemic and Perceptual Domains

open access: yesCognitive Science, Volume 48, Issue 6, June 2024.
Abstract Previous research suggests that curiosity is sometimes induced by novel information one has no relevant knowledge about, but it is sometimes induced by new information about something that one is familiar with and has prior knowledge about. However, the conditions under which novelty or familiarity triggers curiosity remain unclear.
Michiko Sakaki   +3 more
wiley   +1 more source

Home - About - Disclaimer - Privacy