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Search Results: 1 - 10 of 232620 matches for " Ahmed R Alsuwaidi "
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Epidemiology of severe pediatric adenovirus lower respiratory tract infections in Manitoba, Canada, 1991-2005
Saleh Alharbi, Paul Van Caeseele, Raquel Consunji-Araneta, Taoufik Zoubeidi, Sergio Fanella, Abdul-Kader Souid, Ahmed R Alsuwaidi
BMC Infectious Diseases , 2012, DOI: 10.1186/1471-2334-12-55
Abstract: This was a retrospective study of 193 children who presented to the department of pediatrics at Winnipeg Children's Hospital, Manitoba, Canada with LRTI and had a positive respiratory culture for adenovirus. Patients' demographics, clinical and radiologic features and outcomes were collected. Adenovirus serotype distributions and temporal associations were described. Approximate incidence comparisons (detection rates) of adenovirus LRTI among Aboriginal and Non-Aboriginal children were estimated with 95% confidence intervals.Adenovirus infections occurred throughout the year with clusters in the fall and winter. Serotypes 1 to 3 were the predominant isolates (two thirds of the cases). The infection was more frequent among Canadian Aboriginals, as illustrated in 2004, where its incidence in children 0-4 years old was 5.6 fold higher in Aboriginals (13.51 vs. 2.39 per 10,000, p < 0.000). There were no significant differences in length of hospitalization and use of ventilator assistance between the two groups (p > 0.185 and p > 0.624, respectively) nor across serotypes (p > 0.10 and p > 0.05, respectively). The disease primarily affected infants (median age, 9.5 months). Most children presented with bronchiolitis or pneumonia, with multi-lobar consolidations on the chest x-ray. Chronic (residual) changes were documented in 16 patients, with eight patients showing bronchiectasis on the chest computerized tomography scan.Adenovirus infection is associated with significant respiratory morbidities, especially in young infants. The infection appears to be more frequent in Aboriginal children. These results justify a careful follow-up for children with adenovirus LRTI.Adenoviruses play a significant role in pediatric infections, accounting for 2-5% of the overall respiratory illnesses and 4-10% of the pneumonias [1]. Fifty-six adenovirus serotypes are known so far and are classified into 7 species (species A to G) on the basis of serology, whole genome sequencing and phyloge
Lung tissue bioenergetics and caspase activity in rodents
Ahmed R Alsuwaidi, Mohammed T Alsamri, Ali S Alfazari, Saeeda Almarzooqi, Alia Albawardi, Aws R Othman, Thachillath Pramathan, Stacey M Hartwig, Steven M Varga, Abdul-Kader Souid
BMC Research Notes , 2013, DOI: 10.1186/1756-0500-6-12
Abstract: For Wistar rats, the values of kc and ATP for 0?<?t?≤?7 h (mean?±?SD) were 0.15?±?0.02 μM O2 min-1 mg-1 (n?=?18, coefficient of variation, Cv?=?13%) and 131?±?69 pmol mg-1 (n?=?16, Cv?=?53%), respectively. The AMC peak areas remained relatively small despite a ~5-fold rise over 6 h. Good tissue preservation was evident despite time-dependent increases in apoptotic cells. Lung tissue bioenergetics, caspase activity and structure were deleterious in unoxygenated or intermittently oxygenated solutions. Incubating lung tissue in O2 depleted MEM for 30 min or anesthesia by urethane had no effect on lung bioenergetics, but produced higher caspase activity.Lung tissue bioenergetics and structure could be maintained in vitro in oxygenated buffer for several hours and, thus, used as biomarkers for investigating respiratory pathogens or toxins.In vitro systems for studying tissue mitochondrial O2 consumption (cellular respiration) and morphology in BALB/c mice are recently described [1-3]. These parameters, however, are insufficient for fully assessing cellular viability. For example, cells may respire (consume O2) at a higher rate due to uncoupling oxidative phosphorylation (short-circuiting the inner mitochondrial membrane), an event that results from increased caspase activities [4]. Therefore, measuring cellular ATP and caspase activity are essential biomarkers for a more comprehensive assessment of tissues in vitro.Lung toxicity is a major health concern in the drug development. The US Food and Drug Administration (FDA) has issued several post-marketing drug recalls due to adverse events related to mitochondrial dysfunctions [5]. Thus, developing in vitro systems to assess adverse effects of drugs on lung tissue bioenergetics is important. Drug-induced mitochondrial disturbances have been investigated using different methods, including fluorescence-based oxygen sensitive probes [6-8].In this study, the previously described method [1-3,7] is expanded to include measuremen
Emotional Intelligence Is Synergy in Intelligence  [PDF]
Mohammed R. Ahmed
Psychology (PSYCH) , 2015, DOI: 10.4236/psych.2015.64042
Abstract: Three emotional intelligence models are widely discussed in the literature: the ability model, trait model, and mixed model. This study introduces a model for understanding emotional intelligence: the synergy model. The emotional intelligence model presented in this study is simple and easy to understand. This study suggests that emotional intelligence is the synergy present in intelligence, where total intelligence is the sum of the intelligence quotient, emotional quotient, and unexplained quotient. The model shows three possible outcomes of emotional intelligence. It also suggests that the best way to understand and measure the impact of emotional intelligence is to listen, observe, and feel (LOF) it.
The Environmental Impacts of Kabd Landfill on the Soil and Groundwater in Kuwait: A Case Study  [PDF]
Ahmed R. Al Rashed
International Journal of Geosciences (IJG) , 2018, DOI: 10.4236/ijg.2018.95016
Abstract: The environmental impacts of the Kabd Landfill on the soil and groundwater in Kuwait were evaluated. Physical and chemical analyses were carried out on thirty pairs of surface, subsurface soil and five groundwater samples. The groundwater samples are collected from boreholes nearby and downstream of the landfill while the soil samples collected along six profiles. The groundwater samples were geochemically analyzed to determine the total dissolved solids, cations, anions and heavy metals, particularly Iron (Fe), Copper (Cu), zinc (Zn), Cadmium (Cd), Nickel (Ni), Chromium (Cr) and Aluminum (Al), Lithium (Li), Boron (B), Fluoride (F) and Vanadium (V). The soil samples were geochemically analyzed to determine concentration of Cadmium (Cd), Lead (Pb), Nickel (Ni), Iron (Fe), Aluminum (Al) and organics. The results show that the soil and groundwater are contaminated with high TDS, Na, Ca, Mg, Cl, SO4 and heavy metals, especially Ni, Cd, Cu, Al, V and F. The heavy metal concentrations in both the soil and groundwater samples are compared to the World Health Organization (WHO) standard permissible limits. The results revealed that the Zn, Li, B and Fe metals are below the WHO limits for consumption. The soil lithology, natures of dumping, the depth of quarry and the depth to the groundwater level play roles in leachate generation and groundwater contaminations. Such leachate may be originated from the capillary fringe water, moisture content and rising water table, due to its close level at the bottom of the waste disposal site. The organic strength of the soil was reduced due to waste decomposition and continuous gas
Temperature Distributions for Regional Hypothermia Based on Nonlinear Bioheat Equation of Pennes Type: Dermis and Subcutaneous Tissues  [PDF]
Emmanuel Kengne, Ahmed Lakhssassi, Rémi Vaillancourt
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.33035
Abstract: We have used a nonlinear one-dimensional heat transfer model based on temperature-dependent blood perfusion to predict temperature distribution in dermis and subcutaneous tissues subjected to point heating sources. By using Jacobi elliptic functions, we have first found the analytic solution corresponding to the steady-state temperature distribution in the tissue. With the obtained analytic steady-state temperature, the effects of the thermal conductivity, the blood perfusion, the metabolic heat generation, and the coefficient of heat transfer on the temperature distribution in living tissues are numerically analyzed. Our results show that the derived analytic steady-state temperature is useful to easily and accurately study the thermal behavior of the biological system, and can be extended to such applications as parameter measurement, temperature field reconstruction and clinical treatment.
Post-Aneurysmal Subarachnoid Hemorrhage Vasospasm, Clinical Correlation between the Aneurysm Site and Clinical Vasospasm  [PDF]
Ahmed Ali, Mohamed A.R. Soliman
Open Journal of Modern Neurosurgery (OJMN) , 2018, DOI: 10.4236/ojmn.2018.83025
Abstract: Background: Intracranial vasospasm is a common complication following subarachnoid hemorrhage (SAH). The radiographic vasospasm can reach up to 90% of aneurysmal SAH. Materials and Methods: 139 consecutive patients admitted to Cairo University Hospitals from June 2013 to September 2014 with SAH who had been enrolled in a retrospective controlled study were analyzed retrospectively for the occurrence of vasospasm. The data collected from the charts of Cairo University Hospitals were the patient’s demographics, clinical presentation, aneurysm location, treatment modality, and Glasgow Outcome Scale (GOS) scores. We excluded 24 patients with nonaneurysmal SAH, 3 internal carotid artery (ICA) aneurysms, 7 with multiple aneurysms and 4 patients died before treatment. Results: 72 males and 29 females were included in the study, mean age 53.5 ± 11.5 years. Twelve patients had aneurysms located in the vertebral artery group, 24 had middle cerebral artery aneurysms, 11 had pericallosal aneurysms, and 54 patients had anterior communicating artery (ACoA) complex aneurysms. Radiographic vasospasm occurred in 62.4% with the highest incidence (75.9%) at the ACoA complex group. Symptomatic vasospasm occurred in 48.5% with the highest incidence (63%) at the anterior communicating artery complex aneurysm location. The mean GOS at 6 months follow-up was 4.2. The worse GOS was found in the vertebral artery (VA) aneurysm group with a mean of 3.75. Conclusion: Aneurysms of the anterior communicating artery complex group have a greater risk of both radiographic and clinical vasospasm. Also, the worse 6 months follow-up GOS when an aneurysm was located in the VA group.
Optical Study on Poly(methyl methacrylate)/Poly(vinyl acetate) Blends
R. M. Ahmed
International Journal of Photoenergy , 2009, DOI: 10.1155/2009/150389
Abstract: Transparent films of poly(methyl methacrylate)/poly(vinyl acetate) blend with different concentrations were prepared by using solution-cast technique. FT-IR transmission spectra were carried for the samples to detect the influence of UV radiation. In addition, optical absorption measurements were carried out for the samples at room temperature across the 190–900 nm wavelength regions before and after exposure to UV and filtered radiation using xenon arc lamp. The study has been also extended to include the changes in the optical parameters including the band tail width and band gap energies for the samples. Moreover, the refractive index was calculated for the samples from specular reflection and absorption spectrum before and after exposure to UV and filtered radiation.
Fast-track evaluation of a compact chemically enhanced-trickling filter system
Ahmed, S. A. R.;
Brazilian Journal of Chemical Engineering , 2007, DOI: 10.1590/S0104-66322007000200002
Abstract: with the more stringent legislations pertinent to the management of industrial effluents, it deemed necessary to develop an efficient compact, low cost treatment system that complies with applicable laws. numerous versions of chemically enhanced - biological treatment schemes are commercially established. chemically enhanced-trickling filter has been perceived as an efficient intervention scheme. this paper presents a fast-track approach for estimation of the minimum total annual treatment cost for the proposed chemically enhanced primary treatment/ trickling filter (cept-tf) system under given sets of conditions. the effect of different chemicals has been incorporated through empirical performance formulas. in addition, the influence of the type and characteristic of the media filter has been also addressed. the analysis of the results of the performance of the first stage of the treatment scheme tends to indicate that about 80 % of the biological pollution load can be removed by the upstream chemical treatment at the optimal dose. the optimal economic dose of iron salts ranges from 30 to 40 ppm according to unit capacity and characteristics of the influent. further, the effect of biological filter media type on the total annual cost has been found to be relatively insignificant (6-16) %.
Some Ethical Considerations Regarding Medicalization of Female Genital Mutilation/cutting (Female Circumcision)
R. A. Ragab,Ahmed;
Revista Latinoamericana de Bioética , 2008,
Abstract: according to each society's condition the ethical attitude of the individual may be colored by the attitude of the society. it is therefore not surprising to find what is ethical in one society might not be ethical in another. female genital cutting, as an example, is seen in some societies as a must and something good for the whole community in general and for girls in particular, while in others, it is seen as mutilation and violation of human rights. the practice of female genital cutting is a complex issue that ties the traditional gender roles, superstition, local concepts on health and sexuality, as well as several other social relations. worldwide, an estimated 130 million girls and women have undergone fgc. the current paper examines medicalization of female genital cutting from ethical point of view. the paper discusses the issue in the following themes: definition of the practice, the justifications of the practice, the complications and lastly the ethical reflections. the paper argues that laws that prohibit the practice would not work, without wide socio-cultural change; any effort to eradicate the practice would not succeed.
Anaesthesia and subglottic airway obstruction
BA Bulbulia, R Ahmed
Southern African Journal of Anaesthesia and Analgesia , 2011,
Abstract: In this article, we describe the anaesthetic management and laser excision of a subglottic tumour that caused upper airway obstruction. Stridor was the presenting feature. A good history and careful assessment will reduce the likelihood of erroneous or delayed diagnosis and will improve patient outcome.This case report highlights the use of target-controlled infusions and jet ventilation (high-pressure source ventilation) in the surgical excision of a subglottic tumour.
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