3-(Diphenylamino)isobenzofuran-1(3H)- one

In the title isobenzofuranone derivative, C20H15NO2, the planar fused-ring system (r.m.s. deviation for the 10 fitted atoms = 0.031Å ) forms dihedral angles of 63.58 (6) and 63.17 (8)º with the N-bound phenyl rings; the dihedral angle between the planes of these phenyl rings is 85.92 (7)° . In the crystal, molecules are linked by weak C-H... O interactions, involving both O atoms, forming helical supramolecular chains along [001].Universidad del ValleCOLCIENCIA

Simultaneous circulation of genotypes I and III of dengue virus 3 in Colombia

<p>Abstract</p> <p>Background</p> <p>Dengue is a major health problem in tropical and subtropical regions. In Colombia, dengue viruses (DENV) cause about 50,000 cases annually, 10% of which involve Dengue Haemorrhagic Fever/Dengue Shock Syndrome. The picture is similar in other surrounding countries in the Americas, with recent outbreaks of severe disease, mostly associated with DENV serotype 3, strains of the Indian genotype, introduced into the Americas in 1994.</p> <p>Results</p> <p>The analysis of the 3'end (224 bp) of the envelope gene from 32 DENV-3 strains recently recovered in Colombia confirms the circulation of the Indian genotype, and surprisingly the co-circulation of an Asian-Pacific genotype only recently described in the Americas.</p> <p>Conclusion</p> <p>These results have important implications for epidemiology and surveillance of DENV infection in Central and South America. Molecular surveillance of the DENV genotypes infecting humans could be a very valuable tool for controlling/mitigating the impact of the DENV infection.</p

2,2'-(1,4-Phenylene)bis(propane-2,2-diyl) bis(benzodithioate)

The title compound, C26H26S4, shows a dihedral angle of 76.64 (15) between the central and peripheral benzene rings. An inversion center is located at the centroid of the thiobenzoyl ring. In the crystal, weak C-H...S interactions form C(5) chains along [001]. There are no classical hydrogen bonds.Universidad del ValleUniversidad de San Buenaventur

3,5-Bis(benzyloxy)benzoic acid

In the title compound, 'C IND.21''H IND. 18''O IND. 4', the outer benzyl rings are disordered over two resolved positions in a 0.50 ratio. The O-C'H IND. 2' groups form dihedral angles of 4.1 (2) and 10.9 '(4) GRAUS' with the central benzene ring, adopting a syn-anti conformation with respect to this ring. In the crystal, the molecules are linked by O-H...O hydrogen bonds and weak C-H...O interactions, forming chains along [010]

4-formyl-2-nitrophenyl 2-chlorobenzoate

In the title compound, C14H8ClNO5, the benzene rings form a dihedral angle of 19.55 (9)° . The mean plane of the central ester group [r.m.s. deviation = 0.024 A] forms dihedral angles of 53.28 (13) and 36.93 (16)°, respectively, with the nitro- and chloro-substituted rings. The nitro group forms a dihedral angle of 19.24 (19)° with the benzene ring to which it is attached. In the crystal, molecules are linked by weak C- H...O hydrogen bonds, forming C(7) chains, which run along [100]

4-formyl-2-nitrophenyl 4-bromobenzoate

In the title compound, C14H8BrNO5, the benzene rings form a dihedral angle of 62.90 (7)° . The central ester group is twisted away from the nitro-substituted and bromo-substituted rings by 71.67 (7) and 8.78 (15)° , respectively. The nitro group forms a dihedral angle of 7.77 (16)° with the benzene ring to which it is attached. In the crystal, molecules are linked by weak C-H O interactions, forming C(12) chains which run along [001]. Halogen–halogen interactions [Br Br = 3.523 (3) Å] within the chains stabilized by C-H O interactions are observed

2-[1'-(Benzyloxy)spiro[indane-1,2'- pyrrolidine]-5'-yl]acetonitrile

In the title compound, C21H22N2O, the planes of the two sixmembered rings make a dihedral angle of 89.51 (7)° . The pyrrolidine ring has a puckering amplitude q2 = 0.418 (3) and a pseudo-rotation phase angle φ2 = -166.8 (5), adopting a twist conformation (T). The other five-membered ring has a puckering amplitude q2 = 0.247 (2) and a pseudo-rotation phase angle φ2 = -173.7 (5), adopting an envelope conformation with the CH2 atom adjacent to the C atom common with the pyrrolidine ring as the flap. In the crystal, molecules are linked via C-H N, enclosing R2 2(20) rings, forming chains propagating along [100]. The acetonitrile group is disordered over two positions and was refined with a fixed occupancy ratio of 0.56:0.44

Generación de señales ECG con funciones de fourier en un microcontrolador de arquitectura ARM 32

Bioelectrical events manifest themselves as potential differences between two points or electrical signals located in different parts of a living organism, either inside or on its surface. The behavior of these events reflects the health of a human being and to determine them, vital signs are checked. To obtain a proper diagnosis, among some vital signs, is the electrocardiogram (ECG). Therefore, it is necessary to know and reproduce this signal to diagnose any condition or to make sure that the equipment that acquires the signal works properly. This motivated the development of the present work, which presents the emulation of an ECG signal through the sum of Fourier harmonics in a 32-bit ARM STM STM32f407VGT architecture microcontroller, due to its design features and its application to embedded systems, as well as the performance in terms of peripherals available to reproduce the signal. As the Electrocardiogram ECG signal is a periodic signal, with a fundamental frequency determined by the heart rate frequency, it satisfies the Dirichlet conditions, which states that for the Fourier series to exist, its coefficients are finite. The main contribution of this work was to generate EGC signals in an artificial way, which can be useful for medical training or calibration of measuring instruments.Los eventos bioeléctricos se manifiestan como diferencias de potencial entre dos puntos o señales eléctricas localizadas en diferentes lugares de un organismo viviente, ya sea dentro o en la superficie de este, el comportamiento de estos refleja la salud de un ser humano y para determinarlos se verifican los signos vitales. Para obtener un diagnóstico adecuado, entre algunas señales vitales, se encuentra el electrocardiograma (ECG). Por ello, es necesario conocer y reproducir esta señal para diagnosticar algún padecimiento o bien asegurarse que el equipo que adquiere la señal funciona adecuadamente. Esto motivó el desarrollo del presente trabajo, que presenta la generación artificial de una señal ECG a través de la suma de armónicos de Fourier en un microcontrolador de arquitectura ARM ST STM32f407VGT de 32 bits, debido a sus características de diseño y su aplicación a sistemas embebidos, así como las prestaciones en cuestión de periféricos disponibles para reproducir la señal. Como la señal Electrocardiograma ECG es una señal periódica, con una frecuencia fundamental determinada por la frecuencia de ritmo cardiaco, satisface las condiciones de Dirichlet, que plantea que para que la serie de Fourier exista, sus coeficientes son finitos. La contribución principal de este trabajo fue generar señales EGC de manera artificial, que pueda ser útil para entrenamiento médico o calibración de instrumental de medición

Solubility of the metal precursor Ni(NO3)2⋅6H2O in high-pressure CO2 + ethanol mixtures

The solubility of Ni(NO3)2⋅6H2O in high-pressure CO2 + ethanol mixtures was measured using a high-pressure variable-volume view cell from (308.2 to 353.2 K) and up to 25.0 MPa. This compound has been used previously as a Ni precursor in metal deposition experiments using supercritical CO2. Ni(NO3)2•6H2O was not soluble in pure CO2 but the addition of ethanol into the system allowed the solubilisation of the hydrated salt in the mixture. Mole fraction of Ni(NO3)2•6H2O varied from 1.67 10-4 to 1.97 10-3. At these salt concentrations, the phase diagram of the CO2 + EtOH + Ni(NO3)2⋅6H2O system resembled that of the CO2 + EtOH binary system and, at the studied conditions, a vapourliquid equilibrium was observed. For the higher ethanol concentrations, the bubble points closely matched those of the CO2 + EtOH system. For the lower EtOH concentrations, however, much higher solubilisation pressures were required, due to the release of water molecules from the salt into the solution. Ni(NO3)2⋅6H2O solutions were stable in highpressure CO2 + EtOH mixtures at the studied conditions