Search results for "hill"
showing 10 items of 369 documents
Two-year-old girl with tuberous xanthomas.
2018
A 2-year-old girl was referred for evaluation because she had two nodular lesions located on both heels, and another elongated lesion in the intergluteal cleft. On physical examination, two yellow to orange well-defined nodules, suggestive of xanthomas, were bilaterally located on the Achilles tendon areas (figure 1A). Moreover, another yellowish, slightly raised lesion with band-like morphology was seen in the intergluteal cleft (figure 1B). There were no other anomalies on physical examination. Figure 1 (A) Tuberous xanthoma located on the left heel. (B) Planar xanthoma located in the intergluteal cleft. (C) Peripheral blood smear examination showing numerous red cells and two macrothromb…
Noninvasive ventilation for acute hypoxemic respiratory failure/ARDS: The show must go on
2018
Modulation of muscle-tendon interaction in the human triceps surae during an energy dissipation task.
2017
The compliance of elastic elements allows muscles to dissipate energy safely during eccentric contractions. This buffering function is well documented in animal models but our understanding of its mechanism in humans is confined to non-specific tasks, requiring a subsequent acceleration of the body. The present study aimed to examine the behaviour of the human triceps surae muscle-tendon unit (MTU) during a pure energy dissipation task, under two loading conditions. Thirty-nine subjects performed a single-leg landing task, with- and without added mass. Ultrasound measurements were combined with 3D kinematics and kinetics to determine instantaneous length changes of MTUs, muscle fascicles, A…
Biplanar ultrasound investigation of in vivo Achilles tendon displacement non-uniformity
2019
The Achilles tendon is a common tendon for the medial and lateral gastrocnemius and soleus muscles. Non‐uniform Achilles tendon regional displacements have been observed in vivo which may result from non‐uniform muscle loading and intratendinous shearing. However, prior observations are limited to the sagittal plane. This study investigated Achilles tendon tissue displacement patterns during isometric plantarflexor contractions in the coronal and sagittal planes. Fourteen subjects (5 female, 9 male, 26 ± 3 year) performed maximal isometric plantarflexor contractions with the knee in full extension and flexed to 110°. An ultrasound transducer positioned over the free Achilles tendon collecte…
Ultrasonographic Measurements of the Achilles Tendon in Elderly Athletes and Sedentary Men
1994
Ultrasonography was performed on the Achilles tendon of the dominant limb of 18 male elderly athletes and 11 sedentary men, aged 70 to 80 years. The tendons were examined with a real-time linear array scanner using a 7.5 MHz transducer. Both longitudinal and transverse images were taken. The mean width of the Achilles tendon was significantly larger in the athletes than in the control subjects. The tendon thickness and cross-sectional area did not differ significantly between the groups, but the figures may indicate a tendency for larger cross-sectional area in the athletes. The results suggest tendon hypertrophy following long-term training.
Analytical solution of kinematic wave time of concentration for overland flow under green-ampt infiltration
2015
In this paper the well-known kinematic wave equation for computing the time of concentration for impervious surfaces has been extended to the case of pervious hillslopes, accounting for infiltration. An analytical solution for the time of concentration for overland flow on a rectangular plane surface is derived using the kinematic wave equation under the Green-Ampt infiltration. The relative time of concentration is defined as the ratio between the time of concentration of an infiltrating plane and the soil sorptivity time scale, depending on the normalized rainfall intensity and a parameter synthesizing the soil and hillslope characteristics. It is shown that for a more complex case (corre…
Análisis transcriptómico del daño por frío en fruto de melocotón
2016
En la industria hortofrutícola las bajas temperaturas se utilizan para retrasar la maduración y el decaimiento de los frutos. A pesar de tener un uso extendido, los frutos de melocotón sometidos a almacenamiento prolongado en frío (CS) a menudo desarrollan una forma de daño por frío (CI) genéticamente controlada llamada harinosidad (mealiness/woolliness [WLT]): un desorden textural de la pulpa del fruto caracterizado por la perdida de suculencia Aunque durante el frío se han observado algunas alteraciones microscópicas, los síntomas visibles o macroscópicos de daño se desarrollan, no obstante, cuando los frutos se transfieren a temperatura ambiente (temperaturas de simulación de vida útil, …
Pensar Históricamente : la evaluación en la PAU de Historia de España
2016
La Tesis Doctoral analiza el grado de desarrollo de pensamiento histórico alcanzado por los alumnos preuniversitarios, tomando como referencia la evaluación externa realizada tras finalizar 2o de Bachillerato. Dos han sido las fuentes de información fundamentales en nuestra investigación. Por una parte, los protocolos de examen de las pruebas de Historia de España propuestas por las universidades de las 17 Comunidades Autónomas. Y por otra, las respuestas de los alumnos, sobre una muestra de 300 exámenes, seleccionada de las Universidades de Valencia y Santiago de Compostela. Se trata de una investigación que nos ha exigido combinar diferentes métodos de investigación, cuantitativos y cuali…
Synthesis of 3-Oxa-guaianolides from Santonin
2000
Abstract This article reports on the transformation of santonin into two C10-epimeric 3-oxa-guaianolides which are 8-deoxyderivatives of several natural 3-oxaguaianolides isolated from Achillea species. The synthesis involved the photochemical rearrangement of the eudesmane skeleton into a guaiane skeleton and the transformation of the cyclopentane ring into a furan moiety with the concomitant loss of C3. Comparison of the NMR data of the synthetic products with those of the natural products confirms the β orientation of the hydroxyl group at C10 in the products isolated from Achillea.