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Search Results: 1 - 10 of 7950 matches for " Ahmad Alshadwi "
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Excision of Oral Submucous Fibrosis and Reconstruction with Full Thickness Skin Graft: A Case Study and Review of the Literature
Ahmad Alshadwi,Ishwar Bhatia
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/628301
Abstract:
Excision of Oral Submucous Fibrosis and Reconstruction with Full Thickness Skin Graft: A Case Study and Review of the Literature
Ahmad Alshadwi,Ishwar Bhatia
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/628301
Abstract: Oral submucous fibrosis is a chronic debilitating disease characterized by gradually increasing fibrosis of the oral cavity and pharynx, mainly the buccal mucosa, resulting in trismus. The highest incidence of oral submucous fibrosis is seen in South India due to various deleterious habits. In spite of the numerous medical modalities employed in the management of oral submucous fibrosis, occasionally surgical intervention becomes inevitable. Various surgical approaches have been used to reconstruct the surgical defects following excision of fibrous bands. Full thickness skin grafts have been described in the literature with variable outcomes. In the present study a 38-year-old male presented with severe oral submucous fibrosis of the buccal mucosa, which was successfully treated and reconstructed using full thickness skin graft with stable functional result after one year of treatment. An integrated review of the literature regarding etiology, histopathology, diagnostic, and treatment modalities of the disease follows. 1. Introduction Oral submucous fibrosis is commonly seen in the Indian subcontinent. The condition has a multifactorial origin but is commonly associated with chewing of areca nut (betal nut) habitually. This condition was first described by Schwartz in 1952 [1]. Oral submucous fibrosis is a chronic inflammatory reaction in the subepithelial tissue of the oral cavity. It results in increased fibroelastic changes by causing both increased collagen production and decreased collagen breakdown, accompanied by epithelial atrophy [2, 3]. The role of Arecoline and Tannis of areca nut causing juxtaepithelial hyalinization and muscle fibrosis is well described in the literature [4]. The clinical features such as excessive salivation, absent gustatory sensation, and limitation of mouth opening leads to difficulty in chewing, swallowing, articulation, and poor oral hygiene. The oral mucosa appears pale, dense, with vertical fibrotic bands extending to the anterior tonsillar pillars. Various surgical techniques have been recommended to improve mouth opening in oral submucous fibrosis; we report a case of severe oral submucous fibrosis with limited mouth opening that has been released and reconstructed with full thickness skin graft. 2. Case Report A 38-year-old Indian male was referred to the Oral and Maxillofacial Surgery Clinic, Boston University Goldman School of Dental Medicine for the evaluation and management of progressive trismus. Patient presented with main complaint of inability to chew food and limited mouth opening. He reported that this
Recurrent Giant Pilomatrixoma of the Face: A Case Report and Review of the Literature
Mohammed Nadershah,Ahmad Alshadwi,Andrew Salama
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/197273
Abstract: Pilomatrixoma, also known as pilomatricoma, is a benign tumor that originates from the matrix of the hair root. It usually presents as a single, slow-growing subcutaneous or intradermal firm nodule with a general size of less than 3 centimeters (cm) in diameter. However, giant pilomatrixomas (more than 5 cm) have been reported infrequently. It is more common in females and usually presents during the first two decades of life (60%) as an asymptomatic, mobile, hard, elastic mass. Most of the cases are benign and affect the face. The authors report a rare case of a giant pilomatricoma of the cheek and discuss the surgical management of these lesions, histopathological findings, and review of the literature.
Recurrent Giant Pilomatrixoma of the Face: A Case Report and Review of the Literature
Mohammed Nadershah,Ahmad Alshadwi,Andrew Salama
Case Reports in Dentistry , 2012, DOI: 10.1155/2012/197273
Abstract: Pilomatrixoma, also known as pilomatricoma, is a benign tumor that originates from the matrix of the hair root. It usually presents as a single, slow-growing subcutaneous or intradermal firm nodule with a general size of less than 3 centimeters (cm) in diameter. However, giant pilomatrixomas (more than 5?cm) have been reported infrequently. It is more common in females and usually presents during the first two decades of life (60%) as an asymptomatic, mobile, hard, elastic mass. Most of the cases are benign and affect the face. The authors report a rare case of a giant pilomatricoma of the cheek and discuss the surgical management of these lesions, histopathological findings, and review of the literature. 1. Introduction Pilomatrixoma, also known as pilomatricoma or calcifying epithelioma of Malherbe, was first described in 1880 by Malherbe and Chenantais [1]. In 1961, Forbis and Helwig proposed the term pilomatrixoma to emphasize the lesion origin, the matrix of the hair root [2]. pilomatrixoma is a benign skin neoplasm that usually presents as a single, slow-growing subcutaneous or intradermal firm nodule with a general size of less than 3 centimeters (cm) in diameter. However, giant pilomatrixomas (more than 5?cm) have been reported infrequently. It is more common in females and usually presents during the first two decades of life (60%) as an asymptomatic, mobile, hard, elastic mass. Most of the cases are benign and affect the face [3, 4]. We report a rare case of a giant pilomatricoma of the cheek and discuss the surgical management of these lesions, histopathological findings, and review of the literature. 2. Case Report A 28-year-old male was referred to the department of oral and maxillofacial surgery for evaluation and management of a left facial mass. He had no other medical problems and no known food or drug allergies. At the age of 15 years, he noticed a mass on his left cheek eminence, which was excised and was told that it was a sebaceous cyst. Three years later, he had a local recurrence of the facial mass that was surgically excised again showing the same pathology. A third recurrence in the same area occurred 4 years later and was excised with the overlying skin. However, at this time the pathology specimen proved to be pilomatrixoma. The mass recurred again few years later and has been growing slowly over the past 3 years prior to presentation. Clinical examination of the face showed a firm, nontender mass infiltrating the overlying skin of the left buccal subunit measuring about ?cm. The overlaying skin had bluish discoloration
Desulphurization of Transportation Fuels by Per-Formic Acid Oxidant Using MoOx Loaded on ZSM-5 Catalyst  [PDF]
Waqas Ahmad, Imtiaz Ahmad
Journal of Power and Energy Engineering (JPEE) , 2017, DOI: 10.4236/jpee.2017.512011
Abstract:
Desulphurization of model and real oil samples was investigated using performic acid as oxidant assisted by air as co-oxidant. The catalysts used were Mo-oxide supported on ZSM-5 zeolite, which was synthesized in the laboratory and characterized by FT-IR, XRD, SEM and SSA analysis. In case of model oil, the optimum condition determined for complete oxidation of all the model compounds including thiophene, DBT and 4,6-DMDBT were; 60?C, 60 min, ambient pressure and air flow rate of 100 mL/min. The oxidation reactivity decreased from 4,6-DMDBT to DBT and thiophene, which was found to follow pseudo first order kinetics. The real oil sample used in the study included untreated naphtha (NP), light gas oil (LGO), heavy gas oil (HGO) and Athabasca bitumen (Bit.). In case of NP and LGO the sulfur removal of above 78% was attained whereas in case of HGO and Bit. samples about 60% of desulfurization was achieved.
Efficiency and Duality in Nondifferentiable Multiobjective Programming Involving Directional Derivative  [PDF]
Izhar Ahmad
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.24057
Abstract: In this paper, we introduce a new class of generalized dI-univexity in which each component of the objective and constraint functions is directionally differentiable in its own direction di for a nondifferentiable multiobjective programming problem. Based upon these generalized functions, sufficient optimality conditions are established for a feasible point to be efficient and properly efficient under the generalised dI-univexity requirements. Moreover, weak, strong and strict converse duality theorems are also derived for Mond-Weir type dual programs.
Visco-Elastic Boundary Layer Flow past a Stretching Plate and Heat Transfer with Variable Thermal Conductivity  [PDF]
Naseem Ahmad
World Journal of Mechanics (WJM) , 2011, DOI: 10.4236/wjm.2011.12003
Abstract: In the present paper, the boundary layer flow of Walters Liquid B Model over a stretching plate has been considered to solve heat flow problem with variable conductivity. First, using similarity transformation, the velocity components of velocity have been obtained. Then, the heat flow problem has been considered in two ways: 1) prescribed surface temperature (PST), and 2) prescribed stretching plate heat flux (PHF) in case of variable conductivity. Due to variable conductivity, temperature profile has its two part- one mean tempera-ture and other temperature profile induced due to variable conductivity. The related results have been dis-cussed with the help of graphs.
Intelligent MSW Biocell Approach for Efficient Methane Production  [PDF]
Ahmad Qasaimeh
Computational Water, Energy, and Environmental Engineering (CWEEE) , 2012, DOI: 10.4236/cweee.2012.12003
Abstract: The aim of this research is to provide approach to enhance methane production and to convert CO2 released into methane via anaerobic degradation. Despite CH4 has more global warming potential than CO2 but it is less available in the environment and it has fuel value. This research suggests approach that methane is being stimulated and carbon dioxide is being converted to methane. The methane enhancement herein is achieved via technical and intelligent processes. The technical processes entail leachate and carbon dioxide recirculation. The recirculated leachate is controlled via fuzzy intelligent system that acquires values of abiotic factors such as C:N:P, pH, temperature, and moisture content, and then these values are introduced to trained fuzzy system to decide the value of methane production quality. The fuzzy logic proceeds in systematic sequence as input, inference through rules, and output. If the fuzzy logic output decision indicates bad production, then the value of aboitic factors are dynamically altered with optimized combination of values. Carbon dioxide is being re-circulated in order to convert it biologically to methane by hydrogenotrophic methanogens. The hydrophobic permeable membranes are used as planes through the solid waste. These selective membranes are used to separate biogas and to have smooth and fast transfer of biogas from waste to the storage. The approach of this research is believed to be as a new generation of sustainable green bio-fuel biocells.
Root Analogous Solid Waste Management System (RA-MSW for Biocells)  [PDF]
Ahmad Qasaimeh
Journal of Environmental Protection (JEP) , 2012, DOI: 10.4236/jep.2012.38090
Abstract: Root Analogous Municipal Solid Waste System “RA-MSW” is a novel management system that manages waste, biogas, and leachate in bioreactor landfill. Different than conventional disposal at landfills, waste is penetrated by synthetic roots that serve dual mission for biogas collection and leachate recirculation. RA-MSW roots are permeable hydropho- bic polymer material that are formed on-place or prefabricated at factory from recyclable material available on the dumping area. Since the material is hydrophobic, it does not contain water in the voids providing more space for gas transport and collection. The roots are also interchangeably used for leachate recirculation where the parameters of wa- ter content, nutrients, pH, and temperature are optimized to enhance biogas production simultaneously with leachate treatment. RA-MSW provides new approach of waste management and control; it has new virtues of landfill operation; new material medium for biogas collection; new biocell design configuration; new manipulation for leachate and biogas. The approach adds new merits for solid waste management, bio-energy utilization, and the concept of 5 R’s cycle for MSW management.
Solar Energy Optimization through Seasons: Case Study in Jordan  [PDF]
Ahmad Qasaimeh
Smart Grid and Renewable Energy (SGRE) , 2012, DOI: 10.4236/sgre.2012.34038
Abstract: Solar energy in Jordan is recognized high amongst in the world. The solar energy cultivation needs to be magnified by optimizing the angle of inclination of solar cells. The angle of inclination in this work is not fixed but variable throughout the year, and consequently the angle is optimized for seasons. In this research, the optimized angles for seasons in Jordan are obtained as: 60? for Winter (November to February), 30? for Spring (March and April), 10? for Summer (May to August), and 30? for Fall (September and October). The optimized cultivated energy throughout all seasons in the year equals about 2490 kWh/m2. The residential customer consumption of electricity is 2475 kWh/customer per year. Therefore, according to Jordan, if the sun energy is converted efficiently to electricity, it will be worthy to apply for residential building for which each customer should have some area of solar cells to overcome the needs of energy. In addition, with some wise management of electricity in the daylight period, fossil fuel consumption will be minimized. Hence, combining solar energy concept in the design of building is an important step in sustainable development of green energy.
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