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Search Results: 1 - 10 of 684937 matches for " J. -S. Réal "
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New oxorhenium (V) complex with an imidazol [NN] /hydantoin [SN] mixed ligand system, and radiochemical behavior of its oxotechnetium (V) complex analog  [PDF]
N. S. Al-Hokbany, R. M. Mahfouz, I. J. Al-Jammaz
Journal of Biophysical Chemistry (JBPC) , 2011, DOI: 10.4236/jbpc.2011.22012
Abstract: A [ReO(Imz)(Hyd)(H2O)2OH] complex was successfully synthesized by the ligand exchange method using oxorhenuim citrate and an imidazole /Hydanton mixed ligand system. Geometry optimization of complex has been carried out using DFT at the B3LYP/LANL2DZ functional in singlet state. B3LYP predicated infrared spectrum of the geometrically optimized structure using the same level of the theory and the same base set showed good agreement with experimentally observed values. The spin allowed singlet-singlet electronic transition of the [ReO(Imz)(Hyd) (H2O)2OH] complex was calculated with time dependent density function theory (TD-DFT) and the UV-Vis spectra has been discussed on this basis. The complex was characterized using microanalysis and IR, UV-Vis, NMR and mass spectroscopic. The technetium tracer [99mTcO(Imz)(Hyd) (H2O)2OH] has also been synthesized by two methods using 99mTc-gluconate as a precursor or; by direct reduction. The radiochemical purity of the complex was over 95% as measured by thin layer chromatography. In vitro studies showed that the complex possessed good stability under physiological conditions. The partition coefficient indicated that the complex hydrophilic and the electrophoresis results showed that the complex cationic. Biodistrbution in mice showed that the complex accumulated in heart uptake of 9.53±3.87 % ID/gm at 5 min and good retention (6.37±1.21) % ID/gm at 60 min. One hour after the injection, the heart/liver, heart/lung and heart/blood radioactivity ratios were 0.46, 1.04 and 0.56, respectively. These findings indicate that the complex might be suitable for myocardial imaging.
Measurement of Gamma Emitting Radionuclides for Assessment, Environmental Hazards of Radiation in Rock and Soil Samples of Shabwah and Hadramout Regions, Yemen  [PDF]
Sherif S. Nafee, Dheya Al-Othmany, Safia H.Q. Hamidalddin, J.H. Al-Zahrani, W.R. Alharbi, Hanan M. Barashed
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.55005
Abstract: The natural radioactivity of 226Ra, 232Th and 40K and the fallout of 137Cs in soils and granite rocks of two regions in Yemen (Shabwah and Hadramout) were measured by using gamma-ray spectrometry (HPGe) detector. The average values of the radionuclides 226Ra, 232Th and 40K in the soil samples are 14.34, 25.78 and 566.05 Bq/kg respectively. For rock samples, the average activity concentration for 226Ra, 232Th and 40K are 45, 106 and 1235 Bq/kg respectively. Low concentration values of 137Cs in soil and rock samples under investigation, are not radiologically important. The radium equivalent activity (Raeq) and external hazard index (Hex) of all samples are less than the limits of 370 Bq·kg-1 and unity, respectively. The average values of total absorbed dose rate due to three primordial radionuclides in soil and rock samples are 46.5 nGy/h and 138.36 nGy/h, respectively, where the absorbed average value of the granite is higher than the permitted limit. So, the local people must avoid using these granite samples as the interior decorative materials of dwelling without radioactivity control.
Actividad clínica en la consulta médica a demanda de un Centro Penitenciario frente a la de un Centro de Salud
Chérrez,C.; Alás,R.; Sanchiz,J.R.;
Revista Espa?ola de Sanidad Penitenciaria , 2007, DOI: 10.4321/S1575-06202007000300003
Abstract: objectives: to describe and quantify clinical practice consultancy in a prison health care unit so as to evaluate likely differences from a community health care centre. to identify possible training needs when transferring health care staff from one system to another in the light of probable integration of prison health care into the public health system. methods: a transversal descriptive study was used for three primary health care teams: an urban health centre with a high work load, a rural health centre with a low work load, and the health care unit of a provincial prison (not a mega-prison). ransom sequential sampling was used to include all the medical activity generated in the consultancy. all activity programmed by the health professional and administrative consultancy was excluded, while efforts were made to locate troubled consultations. comparisons were made by contrasting differences in proportions. results: the prison health care unit showed higher statistically significant clinical activity in mental health, drug abuse, hiv and hcv infection management and specific primary health care problems (biopsychosocial integration is a therapeutic priority). in both community health centres there is more statistically significant activity in internal medicine and geriatrics. in the prison environment there is significantly higher troubled consultation. conclusions: in a future context of integration of prison health care services into the public health service, training in mental health care (especially addictive disorders) and in hiv-hcv infection management may be necessary for community health centre professionals wishing to transfer to prison health care units. the prison health care professional who wants to work in a public health centre may need training in internal medicine (especially geriatrics). the statistically significant results for health care in prison, primary health care and troubled consultation suggest that the gp plays a more active role
Actividad clínica en la consulta médica a demanda de un Centro Penitenciario frente a la de un Centro de Salud Comparisons between clinical practice consultation in a prison and in community health centres: differences and repercussions
C. Chérrez,R. Alás,J.R. Sanchiz
Revista Espa?ola de Sanidad Penitenciaria , 2007,
Abstract: Objetivos: Describir y cuantificar la actividad clínica en las consultas de demanda de un Centro Penitenciario (CP) para valorar las posibles diferencias respecto a un Centro de Salud (CS). Identificar los posibles requerimientos de formación específica ante eventuales traslados de profesionales entre uno y otro medio, resultantes de una supuesta integración de la Sanidad Penitenciaria (SP) en el conjunto del Sistema Público de Salud (SPS). Método: Estudio descriptivo transversal. Se aplica en tres equipos de Atención Primaria (AP): un Centro de Salud Urbano de alta carga asistencial (CSU), un Centro de Salud Rural de baja carga asistencial (CSR) y un CP provincial -no tipo macro cárcel-. Muestreo aleatorio secuencial que incluye toda la actividad médica generada en la consulta de demanda. Se excluye toda la actividad programada por el profesional sanitario y las consultas administrativas. Se realiza un intento de reconocimiento de consultas conflictivas para el profesional. Las comparaciones se realizan mediante el test estadístico de Contraste de Diferencia de Proporciones. Resultados: En el CP se halla significación estadística (SE) de mayor actividad clínica en las áreas de salud mental, toxicomanías, manejo de infección VIH-VHC y de problemas específicos de AP (integración biopsicosocial prioritaria en su tratamiento). En ambos CS hay SE de mayor actividad en el conjunto del área de Medicina Interna (MI) y de Geriatría (G). En el medio penitenciario hay SE de mayor conflictividad en la consulta. Conclusiones: En un futuro contexto de integración de derecho de la SP, puede ser necesaria formación en salud mental, particularmente en trastornos adictivos, y en manejo de infección VIH-VHC para ejercer en un CP. Puede ser necesaria formación en el conjunto de Medicina Interna, particularmente en Geriatría, de médicos de CP para que se trasladen a CS. La significación obtenida, en la asistencia sanitaria de una prisión, de la AP y de la conflictividad, sugiere un papel más relevante del médico general en un CP que en el conjunto del SPS y puede ser un dato a tener en cuenta en la planificación de la anunciada integración de la SP en el SPS. Objectives: To describe and quantify clinical practice consultancy in a prison health care unit so as to evaluate likely differences from a community Health Care Centre. To identify possible training needs when transferring health care staff from one system to another in the light of probable integration of Prison Health Care into the Public Health System. Methods: A transversal descriptive study was used for three Pri
Damping of longitudinal magneto-acoustic oscillations in slowly varying coronal plasma
R. Erdelyi,K. S. Al-Ghafri,R. J. Morton
Physics , 2010, DOI: 10.1007/s11207-011-9795-5
Abstract: We investigate the propagation of MHD waves in a homogenous, magnetized plasma in a weakly stratified atmosphere, representing hot coronal loops. In most of earlier studies a time-independent equilibrium is considered. Here we abandon this restriction and allow the equilibrium to develop as function of time. In particular, the background plasma is assumed to be cooling due to thermal conduction. The cooling is assumed to be on a time scale greater than the characteristic travel times of the perturbations. We investigate the influence of cooling of the background plasma on the properties of magneto-acoustic waves. The MHD equations are reduced to a 1-D system modelling magneto-acoustic modes progressing along a dynamically cooling coronal loop. A time dependent dispersion relation which describes the propagation of the magneto-acoustic waves is derived by using the WKB theory. An analytic solution for the time-dependent amplitude of waves is obtained and the method of characteristics is used to find an approximate analytical solution. Numerical calculations are applied to the analytically derived solutions to obtain further insight into the behavior of the MHD waves in a system with variable, time-dependent background. The results show that there is a strong damping of MHD waves that can be linked to the widely observed damping of hot coronal loop oscillations. The damping also appears to be independent of position along the loop. Studies of MHD wave behaviour in time-dependent background seem to be a fundamental and very important next step in developing MHD wave theory applicable to a wide range in solar physics.
Predictors of Conversion to Multiple Sclerosis in Patients with Clinical Isolated Syndrome Using the 2010 Revised McDonald Criteria
R. Alroughani,J. Al Hashel,S. Lamdhade,S. F. Ahmed
ISRN Neurology , 2012, DOI: 10.5402/2012/792192
Single versus combination therapy in acute tocolysis: A prospective randomized controlled trial  [PDF]
Wafa R. Al-Omari, Muzibunnisa A. Begam, Farsana S. Khan, Iman Y. Khudhair, Nicolaas J. Nagelkerke
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.32047

This is a prospective controlled randomized trial conducted in 92 women with singleton pregnancies in preterm labor. The tocolytic efficacy and safety of combination atosiban and nifedipine was compared with that of the single agent, atosiban. Both lines of intervention was administered for 48 hours. Progression of labor was assessed by the frequency of uterine contractions and cervical changes. For statistical purpose, intent-to-treat (ITT) analysis was used throughout. Efficacy, as determined by the proportion of women in each group who did not deliver after therapy initiation, was comparable with no significant differences, at 48 hrs (91.5% vs. 91.1%) and at 7 days (90.7% vs. 85.7%) for the atosiban and the combination groups respectively. Safety was assessed by the numbers of adverse events. Maternal side effects were reported more in the combination group (34% vs. 64%; P = 0.006). Perinatal outcomes were similar between the groups. We conclude that the addition of nifedipine did not substantially improve the clinical outcomes beyond that were achieved with atosiban alone. Moreover, it has increased maternal side effects. Future research could focus on combination of other tocolytics.

A Neurosurgical Golf Injury
R Al-Mahfoudh,S Clark,J Kandasamy,P May
Clinical Medicine : Case Reports , 2008,
Abstract: Being one of the few activities that people of all ages and skill level can play, golf has increased in popularity. Consequently golf-related injuries have been notably increasing over the past few years. This particularly occurs in the paediatric age group[1]. Head injury in this sport is most likely to be caused by golf clubs, however there have been reported cases in the literature of golf ball head injuries[2]. We present a case of an extradural haematoma secondary to a golf ball injury. To our knowledge there has not been a report of an extradural haematoma secondary to a golf ball injury (pubmed search). A high index of suspicion combined with early investigation and prompt management are essential in managing this type of injury
Ultracold atoms in an optical lattice with dynamically variable periodicity
S. Al-Assam,R. A. Williams,C. J. Foot
Physics , 2010, DOI: 10.1103/PhysRevA.82.021604
Abstract: The use of a dynamic "accordion" lattice with ultracold atoms is demonstrated. Ultracold atoms of $^{87}$Rb are trapped in a two-dimensional optical lattice, and the spacing of the lattice is then increased in both directions from 2.2 to 5.5 microns. Atoms remain bound for expansion times as short as a few milliseconds, and the experimentally measured minimum ramp time is found to agree well with numerical calculations. This technique allows an experiment such as quantum simulations to be performed with a lattice spacing smaller than the resolution limit of the imaging system, while allowing imaging of the atoms at individual lattice sites by subsequent expansion of the optical lattice.
Observation of vortex nucleation in a rotating two-dimensional lattice of Bose-Einstein condensates
R. A. Williams,S. Al-Assam,C. J. Foot
Physics , 2010, DOI: 10.1103/PhysRevLett.104.050404
Abstract: We report the observation of vortex nucleation in a rotating optical lattice. A 87Rb Bose-Einstein condensate was loaded into a static two-dimensional lattice and the rotation frequency of the lattice was then increased from zero. We studied how vortex nucleation depended on optical lattice depth and rotation frequency. For deep lattices above the chemical potential of the condensate we observed a linear dependence of the number of vortices created with the rotation frequency,even below the thermodynamic critical frequency required for vortex nucleation. At these lattice depths the system formed an array of Josephson-coupled condensates. The effective magnetic field produced by rotation introduced characteristic relative phases between neighbouring condensates, such that vortices were observed upon ramping down the lattice depth and recombining the condensates.
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