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ángela Mendoza de D’Angelo, una enfermera con vocación
Elisa ángela D'Angelo M
Salud, Arte y Cuidado , 2011,
Abstract: In Tribute Do a ángela Mendoza D 'Angelo, 1962-2009. Illustrious Nurse of Lara State. Teacher and guide of many nursing professionals with a great commitment to service and exceptional nursing woman dedicated to Venezuela. Active driving training and research in the region, he was awarded many national and international awards, seeded, and left his indelible generated human quality in everyone who knew him. His life was dedicated to health, administration, teaching and research in nursing. After two years of his absence, the December 22, 2011, the journal Health and Care Art pays tribute to who in life gave love and service.
Livestock Antibiotic Effects on Nitrification, Denitrification, and Microbial Community Composition in Soils  [PDF]
Sagarika Banerjee, Elisa DAngelo
Open Journal of Soil Science (OJSS) , 2013, DOI: 10.4236/ojss.2013.35024
Abstract:

The broiler (Gallus gallus domesticus) industry in the United States and several other countries routinely includes subtherapeutic levels of antibiotics such as roxarsone, virginiamycin, and bacitracin in the feed to improve bird growth yields. Large fractions of the antibiotics fed to the birds are excreted in manure (litter), which is often applied to soils to improve fertility. Some concerns with this practice are antibiotic-induced alterations in microbially-mediated nutrient cycling, which could influence plant productivity and environmental quality. To investigate this possibility, a series of lab experiments were conducted to determine the effects of increasing levels of the three livestock antibiotics on nitrification, denitrification, and microbial community composition (fatty acid methyl ester profiles) of soils collected along a catena. Roxarsone and virginiamycin significantly influenced microbial community composition and inhibited nitrification in the soils, but only at levels that were several-fold higher than expected in poultry litter-applied soils. Bacitracin did not affect microbial growth, microbial community composition, or nitrification at any concentration tested (up to 500 mg·kg-1). None of the antibiotics influenced denitrification at environmentally-relevant concentrations. Amounts of antibiotics in soil solution were greatly reduced by sorption, which followed Freundlich models in the concentration range of 1 - 500 mg·L-1. Results from this study indicated that addition of roxarsone, virginiamycin, or bacitracin to these soils at environmentally-relevant concentrations would not likely impact microbial community composition, nitrification or denitrification due to intrinsic resistance/insensitivity of microorganisms to these antibiotics and reductions in the bioavailable amounts due to sorption by soil surfaces.

Pacientes con cardiomiopatía dilatada chagásica y cardiopatía no chagásica presentan niveles elevados del factor de necrosis tumoral alfa.
Elisa DAngelo-Mendoza,Claudina Rodríguez-Bonfante,Ignacio Camacho,Johana Martínez
Investigación Clínica , 2005,
Abstract: La Enfermedad de Chagas representa un problema de salud pública en Venezuela, que afecta principalmente individuos que viven en áreas rurales. El 30% de los infectados evoluciona hacia una Miocardiopatía Chagásica Crónica (MCC) caracterizada por insuficiencia cardíaca, arritmias de difícil tratamiento, incapacidad laboral y muerte súbita. No existen factores predictores definitivos para la evolución de la forma indeterminada (asintomático) hacia la MCC. En el presente trabajo se estudiaron 115 pacientes de la consulta de cardiología del Hospital "Baudilio Lara" (Quíbor, estado Lara, Venezuela) y 12 individuos sanos procedentes de la misma zona. Ambos grupos fueron evaluados desde el punto de vista clínico, radiológico, electrocardiográfico, ecocardiográfico y serológico; se determinó la presencia de anticuerpos anti-T. cruzi y los niveles séricos del Factor de Necrosis Tumoral alfa (FNTalfa). Los pacientes con Enfermedad de Chagas fueron clasificados en Grupos: I (asintomáticos), II (asintomáticos, fracción de eyección del ventrículo izquierdo (FEVI) normal y trastornos de la conducción) y III (sintomáticos, trastornos de conducción y FEVI < 70%) y los pacientes con Cardiopatía no Chagásica en dilatados y no dilatados. Los resultados mostraron un 33.04% de seropositividad, observándose un incremento significativo de los niveles séricos del FNTalfa en los pacientes con Enfermedad de Chagas en la fases evolutivas I y III, al ser comparado con el grupo control. Los pacientes en fase II mostraron valores séricos similares al control. Los valores del FNTalfa en los pacientes con Enfermedad de Chagas se correlacionaron negativamente en forma significativa (p < 0,05) con los valores de la fracción de eyección. Los cardiópatas no chagásicos mostraron incrementos significativos de los niveles séricos del FNTalfa, respecto al control y los valores fueron comparables al observado en pacientes con cardiopatía chagásica. Los resultados confirman que la elevación del FNTalfa puede ser un mecanismo inmunopatogénico clave en la progresión de las cardiopatías. Chagas’ disease is a public health problem in Venezuela, affecting people living in rural areas. 30% of the patients evolve to a Chronic Chagasic Myocardiopathy (CCM) characterized by heart failure, arrhythmias, incapacity to work and sudden death. There are not predictive factors to determine the evolution from the indeterminate form of the disease (asymptomatic form) to CCM. In the present paper we have studied 115 patients enrolled in the Cardiology unit at the Baudilio Lara Hospital in Quibor (Lara State, Venez
Choline Promotes Growth and Tabtoxin Production in a Pseudomonas syringae Strain  [PDF]
Lucas A. Gallarato, Emiliano D. Primo, ángela T. Lisa, Mónica N. Garrido
Advances in Microbiology (AiM) , 2012, DOI: 10.4236/aim.2012.23039
Abstract: Some Pseudomonas syringae pathovars secrete tabtoxin, a monocyclic β-lactam antibiotic, responsible for chlorosis, the principal halo blight symptom in susceptible plants as oats, rye, barley, wheat and sorghum, among other. Here, we demonstrated that the production of tabtoxin in a P. syringae strain increased at least 150%, when choline, betaine or dimethylglycine were used as nitrogen source, or when choline was added as osmoprotectant in hyperosmolar culture media. Besides, we investigated the induction of phosphorylcholine phosphatase (PchP) activity when choline or its metabolites were used as nitrogen sources. PchP is an enzyme involved in Pseudomonas aeruginosa pathogenesis through its contribution to the breakdown of choline-containing compounds of the host cells. Considering these results and that the success of a pathogenic microorganism depends on its ability to survive and proliferate in its target tissue, we propose that choline is one of the plant signals that contribute to establishment of the infection by tabtoxin-producing strains of P. syringae.
The Molecular Pathogenesis of Small Cell Lung Cancer
Sandra P. DANGELO,M. Catherine PIETANZA
Chinese Journal of Lung Cancer , 2010,
Abstract:
Prediction of Kappa Number in Eucalyptus Kraft Pulp Continuous Digester Using the Box & Jenkins Methodology  [PDF]
Flávio M. Correia, José V. Hallak dAngelo, Roger J. Zemp, Sueli A. Mingoti
Advances in Chemical Engineering and Science (ACES) , 2014, DOI: 10.4236/aces.2014.44055
Abstract:

The quality of the resulting pulping continuous digesters is monitored by measuring the Kappa number, which is a reference of residual lignin. The control of the kappa number is carried out mainly in the top of the digester, therefore it is important to get some indication of this analysis beforehand. In this context, the aim of this work was to obtain a prediction model of the kappa number in advance to the laboratory results. This paper proposes a new approach using the Box & Jenkins methodology to develop a dynamic model for predicting the kappa number from a Kamyr continuous digester from an eucalyptus Kraft pulp mill in Brazil. With a database of 1500 observations over a period of 30 days of operation, some ARMA models were studied, leading to the choice of ARMA (1, 2) as the best forecasting model. After fitting the model, we performed validation with a new set of data from 30 days of operation, achieving a model of 2.7% mean absolute percent error.

Entanglement dynamics via coherent-state propagators
A. D. Ribeiro,R. M. Angelo
Physics , 2010, DOI: 10.1103/PhysRevA.82.052335
Abstract: The dynamical generation of entanglement in closed bipartite systems is investigated in the semiclassical regime. We consider a model of two particles, initially prepared in a product of coherent states, evolving in time according to a generic Hamiltonian, and derive a formula for the linear entropy of the reduced density matrix using the semiclassical propagator in the coherent-state representation. The formula is explicitly written in terms of quantities that define the stability of classical trajectories of the underlying classical system. The formalism is then applied to the problem of two nonlinearly coupled harmonic oscillators and the result is shown to be in remarkable agreement with the exact quantum measure of entanglement in the short-time regime. An important byproduct of our approach is a unified semiclassical formula which contemplates both the coherent-state propagator and its complex conjugate.
High energy cosmic ray self-confinement close to extragalactic sources
P. Blasi,E. Amato,M. D'Angelo
Physics , 2015, DOI: 10.1103/PhysRevLett.115.121101
Abstract: The ultra-high energy cosmic rays observed at the Earth are most likely accelerated in extra-galactic sources. For the typical luminosities invoked for such sources, the electric current associated to the flux of cosmic rays that leave them is large. The associated plasma instabilities create magnetic fluctuations that can efficiently scatter particles. We argue that this phenomenon forces cosmic rays to be self-confined in the source proximity for energies $E
Extragalactic cosmic ray self-confinement around sources
P. Blasi,E. Amato,M. D'Angelo
Physics , 2015,
Abstract: Most models of the origin of ultra high energy cosmic rays rely on the existence of luminous extragalactic sources. Cosmic rays escaping the galaxy where the source is located produce a sufficiently large electric current to justify the investigation of plasma instabilities induced by such current. Most interesting is the excitation of modes that lead to production of magnetic perturbations that may scatter particles thereby hindering their escape, or at least changing the propagation mode of escaping cosmic rays. We argue that self-generation of waves may force cosmic rays to be confined in the source proximity for energies $E\lesssim 10^{7} L_{44}^{2/3}$ GeV for low background magnetic fields ($B_{0}\ll nG$). For larger values of $B_{0}$, cosmic rays are confined close to their sources for energies $E\lesssim 2\times 10^{8} \lambda_{10} L_{44}^{1/4} B_{-10}^{1/2}$ GeV, where $B_{-10}$ is the field in units of $0.1$ nG, $\lambda_{10}$ is its coherence length in units of 10 Mpc and $L_{44}$ is the source luminosity in units of $10^{44}$ erg/s.
Kinematics and dynamics in noninertial quantum frames of reference
R. M. Angelo,A. D. Ribeiro
Mathematics , 2012, DOI: 10.1088/1751-8113/45/46/465306
Abstract: From the principle that there is no absolute description of a physical state, we advance the approach according to which one should be able to describe the physics from the perspective of a quantum particle. The kinematics seen from this frame of reference is shown to be rather unconventional. In particular, we discuss several subtleties emerging in the relative formulation of central notions such as vector states, the classical limit, entanglement, uncertainty relations, and the complementary principle. A Hamiltonian formulation is derived as well which correctly encapsulates effects of fictitious forces associated with the accelerated motion of the frame. Our approach shows, therefore, how to formulate nonrelativistic quantum mechanics within noninertial reference frames which can be consistently described by the theory, with no appeal to classical elements.
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