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Search Results: 1 - 10 of 67828 matches for " José Socorro "
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Generalized Reissner-Nordstr?m solution in Metric-Affine Gravity
Alfredo Macías,José Socorro
Physics , 1999, DOI: 10.1088/0264-9381/16/7/312
Abstract: We present the generalized Reissner-Nordstr\"om solution of the field equations of metric-affine gravity (MAG), endowed with electric and magnetic charges, as well as with gravito-electric and gravito-magnetic charges and a cosmological constant term. Moreover, the case $M=e_o$, i.e. mass equal to electric charge and $\lambda=0$, corresponds to an electrically and magnetically charged monopole. Also further multipole solutions are obtained. The charge assignments of the solutions is discussed.
Supersimetrías y Parasimetrías de la Ecuación de Riccati
Marco A. Reyes,José Socorro
Acta Universitaria , 2012,
Abstract: Se describe cómo la ecuación de Riccati nos permite definir de manera coloquial diferentes simetrías en ecuaciones de la física matemática. En particular utilizamos la definición de supersimetría en Mecánica Cuántica, obtenida al desarrollar la segunda solución de Riccati para las ecuaciones del modelo, para introducir la parasimetría de otras ecuaciones de la física matemática y de otras áreas de las ciencias.
Gauge theory of gravity: Electrically charged solutions within the metric--affine framework
Friedrich W. Hehl,José Socorro
Physics , 1998,
Abstract: We find a class of electrically charged exact solutions for a toy model of metric-affine gravity. Their metric is of the Pleba\'nski-Demia\'nski type and their nonmetricity and torsion are represented by a triplet of covectors with dilation, shear, and spin charges.
Supersymmetric quantum cosmology for Bianchi class A models
Alfredo Macías,Eckehard W. Mielke,José Socorro
Physics , 1997, DOI: 10.1142/S0218271898000462
Abstract: The canonical theory of (N=1) supergravity, with a matrix representation for the gravitino covector-spinor, is applied to the Bianchi class A spatially homogeneous cosmologies. The full Lorentz constraint and its implications for the wave function of the universe are analyzed in detail. We found that in this model no physical states other than the trivial "rest frame" type occur.
Heats of Mixing Using an Isothermal Titration Calorimeter: Associated Thermal Effects
Manuel Rodríguez de Rivera,Fabiola Socorro,José S. Matos
International Journal of Molecular Sciences , 2009, DOI: 10.3390/ijms10072911
Abstract: The correct determination of the energy generated or absorbed in the sample cell of an Isothermal Titration Calorimeter (ITC) requires a thorough analysis of the calorimetric signal. This means the identification and quantification of any thermal effect inherent to the working method. In this work, it is carried out a review on several thermal effects, studied by us in previous work, and which appear when an ITC is used for measuring the heats of mixing of liquids in a continuous mode. These effects are due to: (i) the difference between the temperature of the injected liquid and the temperature of the mixture during the mixing process, (ii) the increase of the liquid volume located in the mixing cell and (iii) the stirring velocity. Besides, methods for the identification and quantification of the mentioned effects are suggested.
Talidomida usada por pacientes com eritema nodoso hansênico
Valente, Maria do Socorro da Silva;Vieira, José Luiz Fernandes;
Revista da Sociedade Brasileira de Medicina Tropical , 2010, DOI: 10.1590/S0037-86822010000200019
Abstract: introduction: thalidomide is a drug currently used in brazil for treating erythema nodosum leprosum. methods: this was a prospective study to follow up clinical evolution, record adverse events and determine plasma thalidomide levels from a dose of 100 mg/day, among 20 patients with clinical manifestations of erythema nodosum leprosum, divided into two groups: during or after leprosy multidrug therapy. results: no significant differences between the groups were seen during the study, either in relation to favorable clinical evolution among the patients (70% and 90%), or in relation to the adverse events recorded, which were dizziness and somnolence. the plasma thalidomide levels on d7 and d14 were 0.82 ± 0.4μg/ml and 0.79 ± 0.3 μg/ml in group 1 and 0.82 ± 0.4 and 1.55 ± 1.0 in group 2, respectively. conclusions: in this sample, the multidrug therapy had no effect on the clinical evolution, incidence of adverse events and plasma thalidomide levels.
Mercado de trabalho para os bibliotecários nas empresas de Rondonópolis – Mato Grosso
Alexandre Oliveira de Meira Gusm?o,Osvaldo José Socorro
BIBLOS : Revista do Instituto de Ciências Humanas e da Informa??o , 2009,
Abstract:
Multipole solutions in metric--affine gravity
José Socorro,Claus L?mmerzahl,Alfredo Macías,Eckehard W. Mielke
Physics , 1998, DOI: 10.1016/S0375-9601(98)00360-0
Abstract: Above Planck energies, the spacetime might become non--Riemannian, as it is known fron string theory and inflation. Then geometries arise in which nonmetricity and torsion appear as field strengths, side by side with curvature. By gauging the affine group, a metric affine gauge theory emerges as dynamical framework. Here, by using the harmonic map ansatz, a new class of multipole like solutions in the metric affine gravity theory (MAG) is obtained.
Valproic Acid, a Drug with Multiple Molecular Targets Related to Its Potential Neuroprotective Action  [PDF]
José Christian Machado Ximenes, Emilio Crisóstomo Lima Verde, Maria da Gra?a Naffah-Mazzacoratti, Glauce Socorro de Barros Viana
Neuroscience & Medicine (NM) , 2012, DOI: 10.4236/nm.2012.31016
Abstract: Valproic acid (VA) is used worldwide as an antiepileptic drug and a mood stabilizer. Recently, VA was shown to act on cell growth, differentiation and apoptosis, by regulating gene expression at the molecular level, through epigenetic mechanisms. Thus, VA was demonstrated to act on the chromatin remodeling what is a consequence of the drug inhibition of histone deacetylases (HDACs) activity. Other studies uncovered the potential of VA to interfere with multiple regulatory mechanisms besides HDACs, as the GSK3 alpha and beta, Akt, ERK and phosphoinositol pathways, tricarboxylic acid cycle, GABA and OXPHOS system. The review focuses on the mechanisms of action of VA, showing that HDAC inhibitors, as VA, can be successfully used in the treatment of neurodegenerative disorders. This molecule, whose biological activities range from interactions with receptors and ion channels to the regulation of many catalytic reactions, has a central role in cellular cascades that regulate gene expression. Thus, inhibitors of HDACs, by positively affecting both neuronal degeneration and cognitive deficits, appear as promising drugs against various pathological conditions and neurodegenerative diseases. VA is known to present anti-inflammatory and antioxidative properties. And, since inflammation and oxidative stress are common links in neurodegeneration, VA is a drug that, from a clinical point of view, shows a great potential as a candidate for the treatment of neurodegenerative diseases related to excitotoxic events.
Testosterone Levels and Development of the Penile Spines and Testicular Tissue during the Postnatal Growth in Wistar Rats  [PDF]
Marcela Arteaga Silva, Rosa M. Vigueras Villase?or, Socorro Retana Márquez, Marisela Hernández González, Herlinda Bonilla Jaime, Xochitl Guzmán García, José Luis Contreras Montiel
Advances in Sexual Medicine (ASM) , 2013, DOI: 10.4236/asm.2013.33A001
Abstract: Aim of Study: Gonadal hormones exert a profound influence on the development, structure and function of the sexual organs. The testosterone is one of the androgens that plays an essential role in the development of sexual organs in male mammals. Therefore, the present study was undertaken to evaluate the testosterone levels and developmental pattern of the penile spines and seminiferous tubules during early postnatal life of Wistar rats. Methods and Materials: At 7, 14, 21, 28, 35, 42, 49, 56, 63 and 70 days after birth, penile and testicular tissues of male rats were dissected out and fixed for histological study and plasma testosterone levels were determined using high resolution chromatography. Results: An increase in the number of penile follicles, primarily in the distal region of the penis, was observed from postnatal days 14 to 42, followed by a gradual decrease. Penile spines were absent from birth until the first growth peak, which was observed at 42 postnatal days. Both testicular weight and the area of seminiferous tubules showed gradual increases before achieving their highest values at 42 postnatal days. Similarly, a gradual increase in testosterone levels was detected from day 28, with a peak at 42 postnatal days. Conclusions: These data show a temporal association between the development of the penile spines and testicular tissue with gradual increases in testosterone levels. These results may contribute to a better understanding of the behavioral, hormonal and morphological changes underlying sexual maturation in male rats.
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