Search results for "Crista"

Active photonic crystals based on surface acoustic waves

2003

An active photonic crystal (PC) based on the modulation of a one-dimensional cavity resonator by electrically-generated surface acoustic waves is described. The high nonthermal population of surface modes combined with the enhanced Brillouin scattering in the cavity increases the intensity of the scattered light to values comparable to the excitation intensity. This process is employed to switch and modulate light beams in PCs.

Demo 71. Modelo de bolas rígidas para apilamiento compacto

2013

Objetivos: Mostrar gráficamente diferentes empaquetamientos atómicos compactos.

Structural and functional characterization of IMPACT proteins: a novel nuclease family

2016

Tesis doctoral, 183 páginas, tablas y figuras.

Demo 73. Estructura cúbica centrada en caras con átomo intersticial

2013

Objetivo: Mostrar gráficamente cómo un átomo intersticial puede ocupar el espacio en una red cúbica centrada en caras.

Demo 72. Modelo bidimensional de la esfera de Ewald

2013

Objetivo. Ver de forma gráfica bajo qué condiciones se cumple la condición de difracción de Bragg en una red bidimensional periódica utilizando la construcción de Ewald en dos dimensiones (círculos de Ewald).

The enrichment ratio of atomic contacts in crystals, an indicator derived from the Hirshfeld surface analysis

2014

An enrichment ratio is derived from the decomposition of the crystal contact surface between pairs of interacting chemical species. The propensity of different contact types to form is investigated.

Global and local stressors on community succession in the Mediterranean intertidal zone

Three-dimensional bimetallic octacyanidometalates $[M^{IV}{(\mu-CN)_{4}Mn^{II}(H_{2}O)_2}_2 \cdot 4H_{2}O]_{n}$ (M=Nb,Mo,W) : synthesis, single-cryst…

2008

Abstract We report the synthesis, the single-crystal X-ray crystallographic structures and the magnetic properties of three new isostructural cyanido-bridged networks: [M IV {(μ-CN) 4 Mn II (H 2 O) 2 } 2 ·4H 2 O] n [M IV  = Nb IV ( 1 ), Mo IV ( 2 ), W IV ( 3 )]. For compound 1 , the magnetic properties reveal a ferrimagnetic phase below 50 K. In contrast, compounds 2 and 3 show a paramagnetic behaviour with no magnetic ordering down to 2 K. The only electronic difference between the two kinds of compounds is the presence of two paired electrons on Mo IV ( 2 ) and W IV ( 3 ) (d 2 electronic configuration, S  = 0) with no possible exchange interactions with Mn II ions (d 5 electronic configur…

Are double potentials markers of a specific zone of the atrioventricular junction in the isolated rabbit heart?

1997

A study is made of the characteristics of the atrial potentials recorded in the Koch triangle and its proximity, their variations on modifying the site of cardiac pacing, and their usefulness as markers of a distinct zone of the AV junction. In 12 isolated and perfused rabbit heart preparations an analysis was made of the endocardial atrial electrograms recorded with a multiple electrode positioned in the AV junction. The electrograms were obtained during spontaneous rhythm and on pacing at the crista terminalis (CT), interatrial septum (IAS), left atrium, and right ventricle. Double potentials were frequently obtained. On pacing at the CT, high-low double potentials (DP [H-L]) were more fr…

Morphometry of myocardial apex in endurance-trained mice of different ages

1979

Mitochondrial volume density, surface density of the outer mitochondrial membrane, the mean number and size of mitochondria, and the mean surface density of crista membranes together with the volume densities of myofibrils and sarcoplasmic space were morpho-metrically analyzed in cardiac muscle of two groups of sedentary control mice aged 3 and 7 months, and in two groups of mice trained either 1 month rather intensely or 4 months moderately. Of the calculated mitochondrial variables only the surface density of the outer mitochondrial membrane differed between the older controls and the older trained animals, the density being slightly smaller in the trained group. The myofibrillar volume d…