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Search Results: 1 - 10 of 203496 matches for " Abdel Rahman N. Selmy "
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Economic Valuation of Sea Level Rise Impacts on Agricultural Sector in Northern Governorates of the Nile Delta  [PDF]
Mohamed Abdelkareem Abdrabo, Mahmoud Adel Hassaan, Abdel Rahman N. Selmy
Low Carbon Economy (LCE) , 2015, DOI: 10.4236/lce.2015.62007
Abstract: It is widely believed, according to the IPCC (Intergovernmental Panel on Climate Change) projections, that there will be an increase in the global average sea level of 0.18 cm to 0.59 cm through the twenty-first century. The coastal area of the Nile delta is considered to be one of the most vulnerable areas to Sea Level Rise (SLR) in the world. Where, the Nile Delta consists mostly of lowland areas which accommodate a significant proportion of the Egyptian agricultural and economic activities. SLR is expected to have a profound impact on the agricultural areas of the Nile Delta, through either inundation or higher levels and salinity of groundwater. Due to the prevailed vulnerability of the Nile delta and as guidance for decision and policy making, it is necessary to provide estimates of potential economic damage that can result from such SLR. The paper in hand intends to estimate the economic value of the agricultural areas, in the coastal governorates of the Nile Delta, susceptible to inundation due to SLR according to most recent SLR scenarios and to estimate the economic value of potential impacts of rising groundwater table, associated with SLR, on agricultural productivity by the year 2100. The results indicate that about 7.5%, 36.3%, and 44.0% of the total cultivated area of the coastal governorates of the Nile Delta (with a market value of 51.7, 196.6 and 232.6 billion EGP (Egyptian Pound)) will be susceptible to inundation under the different scenarios of SLR. Moreover, it was found that the future accumulative crop yield loss due to increasing groundwater level was estimated, using segmented linear regression, to be as much as 32.3 billion EGP. It is worth mentioning that these estimates do not include indirect impacts of higher levels of groundwater table, which may include loss of jobs and/or earnings, impacts on food supply and food security in the area.
Early fault prediction and detection of hydrocephalus shunting system  [PDF]
Abdel Rahman Alkharabsheh, Lina Momani, Waleed Al-Nuaimy, Jafar Ababneh, Tariq Alwada’n, Abeer Hawatmeh
Journal of Biomedical Science and Engineering (JBiSE) , 2013, DOI: 10.4236/jbise.2013.63036
Abstract:

Trends of various intracranial pressure (ICP) parameters for high pressure hydrocephalus patients are utilized to detect various shunt faults in their early stages, as well as, to monitor the effect of such faults on shunt performance. A method was proposed to predict the time required for ICP to be abnormal and for the valve to reach full blockage condition. Furthermore, an auto valve schedule updating method is proposed and used to temporarily deal with detected faults until the patient is checked up by his/her physician. The proposed algorithms were evaluated using numerical simulation.

Synthesis of New Fluorine/Phosphorus Substituted 6-(2’-Amino Phenyl)-3-Thioxo-1,2,4-Triazin-5(2H, 4H)One and Their Related Alkylated Systems as Molluscicidal Agent as against the Snails Responsible for Bilharziasis Diseases  [PDF]
Abeer N. Al-Romaizan, Mohammed S. T. Makki, Reda M. Abdel-Rahman
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.42017
Abstract: New fluorine substituted 6-(5’-fluoro-2’-triphenylphosphiniminophenyl) 3-thioxo-1,2,4-triazin-5 (2H, 4H) one (2) was obtained via Wittig’s reaction of the corresponding 6-(5’-fluoro-2’-amino-phenyl)-3-thioxo-1,2,4-triazinone (1). Behavior of compound 2 towards alkylating agents and/or oxidizing agents was studied were, N-hydroxyl (3), Mannich base (4,5), S-alkyl (6,7,8) and thiazolo [3,2-b][1,2,4] triazinones (10-14) and or 3-disulfide (18), 3-sulfonic acid 19 and 1,2,4-triazin-3,5-Dionne (20) derivatives obtained. Structures of the new products are established by elemental and spectral data. The new targets obtained screened as Molluscicidalagents against Biomophlaria Alexandrina snails responsible for Bilharziasis diseases, in compare with Baylucide as standard drug.
Synthesis of Novel Fluorine Substituted Isolated and Fused Heterobicyclic Nitrogen Systems Bearing 6-(2’-Phosphorylanilido)-1,2,4-Triazin-5-One Moiety as Potential Inhibitor towards HIV-1 Activity  [PDF]
Reda M. Abdel-Rahman, Mohammed S. T. Makki, Abeer N. Al-Romaizan
International Journal of Organic Chemistry (IJOC) , 2014, DOI: 10.4236/ijoc.2014.44028
Abstract: Novel 6-(5’-fluoro-2’-diphenylphosphorylanilido)-3-hydrazino-1,2,4-trizin-5 (2H) one (3) is achieved from hydrozinolysis of the corresponding 3-thioxo-analoges 2. Compound 2 is also obtained from phosphorylation of 6-(5’-fluoro-2’-aminophenyl)-3-thioxo-1,2,4-triazin-5(2H) one (1). Novel fluorine substituted isolated and/or fused heterobicyclic nitrogen systems bearing and/or containing, 6-phosphoryl anilido-1,2,4-trizin-5 (2H) one moiety (4 - 22) have been synthesized from ring closure reactions of compound 3 with π-acceptors activated carbon compounds in different medium and conditions. Structures of the products are characterized by MS, IR, UV-VIS, CH, N, and 1H/13CNMR spectral data. The new products have been evaluated as potential inhibitors towards HIV-1 activity.
Value of Orthostatic Hypotension as a Prognostic Bed-Side Test in Heart Failure  [PDF]
Tarek M. Abdel Rahman
World Journal of Cardiovascular Surgery (WJCS) , 2012, DOI: 10.4236/wjcs.2012.24022
Abstract:

Background: Neurohumoral compensatory mechanisms play an important role in stabilizing the functional activity of patients with heart failure using the arms of autonomic nervous system. Orthostatic Hypotension (OH) is one of the most incapacitating symptoms of Cardiac Autonomic Dysfunction (CAD). OH can include sympathetic withdrawal which in turn leads to marked disability and deterioration of heart failure symptoms. Progressive Autonomic Dysfunction (AD) associated with progressive deterioration and impact on mortality of many diseases as hypertension, diabetes and other chronic diseases. The idea of using (OH) as a bed-side simple test expecting the risk of deterioration of cardiac function and furthermore on mortality open a gateway for preventive medicine and care to these group of patients. For more confidential prove, studying subjective and objective factors in heart failure patients became necessary to support these idea. Methods and Results: Sixty-Four patients with known history of heart failure were collected. All patients taking the fixed regiment of 4 drugs (diuretic, ACE inhibitor, Digitalis and B-blocker) in appropriate tolerated doses for two weeks prior to the study. History taking and all routine investigations were done for all patients. Grouping is based upon wither they have (OH) or not. Group-A found to have normal Bp response to standing; they were 24 patients (18 male and 6 female) of mean Age (45 ± 8 years). Group-B discovered to have significant (OH) and was 22 patients (16 males and 6 females) of mean Age (43 ± 4 years). The first Clinical and Echocardiographic examination was done and considered as a base-line characteristic. Then, a Call-back after 6 months for follow-up and second visit examination is recorded. Furthermore, every patient was advised to report

Prevalence of Hyperuricemia among Hospitalized Elderly Patients and Its Association with Metabolic Syndrome  [PDF]
Tomader Taha Abdel Rahman
Advances in Aging Research (AAR) , 2014, DOI: 10.4236/aar.2014.34043
Abstract: There are few data available on the prevalence of hyperuricemia among elderly and its possible association with metabolic syndrome (MetS) so the aim of this study was to assess prevalence of hyperuricemia among hospitalized elderly patients as well as to assess its association with MetS. Cross sectional data from 200 hospitalized elderly patients were analyzed and the results were as follows: the prevalence of hyperuricemia was 21.0% in elderly men and 15.1% in elderly women. Multivariate logistic regression analysis revealed that BMI ≥ 30 (p = 0.031, OR = 1.1), hypertension (p = 0.019, OR = 1.8), high triglycerides level (p = 0.018, OR = 2.9) and hyperuricemia (p = 0.023, OR = 3.7) were independently associated with MetS. The study concluded that the prevalence of hyperuricemia among hospitalized elderly patients was 21.0% in elderly men and 15.1% in elderly women. There was an independent association between hyperuricemia and metabolic syndrome.
Health Literacy: Prevalence among Elderly Care Givers and Its Impact on the Frequency of Elderly Hospitalization and Elderly Health Related Quality of Life  [PDF]
Tomader Taha Abdel Rahman
Advances in Aging Research (AAR) , 2014, DOI: 10.4236/aar.2014.35048
Abstract: Caring for the elderly is an extremely lonely and frustrating vigil. The care giver has the responsibility of caring for an elderly one to the myriad decisions on different topics such as diabetes care or cancer treatment. Care givers with low levels of health literacy have less health knowledge, worse management of chronic disease and lower use of preventive services. This study was conducted to determine the prevalence of health literacy among elderly care givers and its impact on the frequency of elderly hospitalization and elderly health related quality of life (QOL). The study was carried out on 200 elderly patients and their corresponding care givers. Rapid Estimate of Adult Literacy in Medicine (REALM) and Newest Vital Sign (NVS) were used to assess caregivers’ health literacy. Assessment of the elderly health related QOL was done by the use of short form-12 health survey (SF-12). The results were as followed, in elderly patients; 92 were males and 108 were females. The mean elderly age was 69.4 ± 8.8. The mean age of caregivers was 42.1 ± 12.9 years. The prevalence of inadequate health literacy among elderly caregivers was 75.0%. There were significant associations between care givers, health literacy and the frequency of elderly hospitalization (p = 0.001), duration of hospital stay (p = 0.009), and the elderly health related QOL (p = 0.001). The study concluded that inadequate health literacy is a problem among elderly care givers in Egypt. Healthcare professionals must be made aware of this problem, which is to provide simplified educational materials to elderly care givers to maximize elderly care.
Spontaneous regression in alveolar soft part sarcoma: case report and literature review
Mohammed N BaniHani, Abdel Rahman A Al Manasra
World Journal of Surgical Oncology , 2009, DOI: 10.1186/1477-7819-7-53
Abstract: We are presenting a case of adult male patient, who was found to have huge abdominal mass and multiple gastric and duodenal polyps. Pathological diagnosis for all lesions was Alveolar soft part sarcoma. Although he complained from metastasis to both lungs and right atrium, all these deposits regressed spontaneously. Patient stated that he used some herbs (Teucrium polium, Cat Thyme) prescribed for him. No chemotherapy or radiotherapy was given. The duration of regression was about 5 months before other lesions appeared. Later on, he died secondary to brain metastasis.ASPS is a rare type of sarcomas that affect primarily the lower limbs. This tumor does rarely metastasize to the gastrointestinal tract.Sarcomas are a type of malignant tumors that arise from connective tissue. They are most of the time found in extremities. The term -Soft Part- is used to distinguish these sarcomas from bone sarcomas. Although soft tissue sarcomas are linked to the tissue of origin; alveolar description is based on the histological pattern of the tumor rather than the origin.A 38 year old male married patient, medically free, referred to our center from a another hospital complaining from lower abdominal pain of few months duration, intermittent, vague, gripping in nature, associated with abdominal distention.He didn't undergo any type of surgery previously. Past history of the patient was negative for any fever, sweating, vomiting, constipation, or weight changes. He also didn't suffer from obstructive urinary symptoms. Family history was negative too.On examination, he actually was found to have large left, hypochondrial mass. It was painless & hard in consistency.On investigation, his hemoglobin level and leukocytic count were within normal range. Markers for colon, liver and prostate cancers were negative. On computerized tomographic (CT) scan; there was a large heterogeneous mass measuring about 16 × 12 × 10 cm occupying the left hypochondrial region with multiple small metastatic
Antifeedant and Toxic Activity of Some Plant Extracts Against Larvae of Cotton Leafworm Spodoptera littoralis (Lepidoptera: Noctuidae)
Hala R. Abdel-Rahman,Reem N. Al-Mozini
Pakistan Journal of Biological Sciences , 2007,
Abstract: The biological activity of crude petroleum ether extracts of Oshar (Calotropis procera); Harmal (Rhazya stricta) and Hargal (Solenostemma argel) were assessed using the 4th larval instar of cotton leafworm Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae). All extracts exhibited a significant antifeedant activity at the LC50 levels. Harmal extract deterred feeding potential of insect larvae by 52.96% but decreased to 26.76 and 18.00% for Hargal and Oshar, respectively. In nutritional assays, all plant extracts affected Growth Rate (GR mg) where Harmal caused the highest rate of efficiency and followed by Oshar against 4th larval instar fed for two days on castor leaves treated with botanical extracts (LC50) and three days on un-treated leaves after that. Hargal didn`t show a significant effect on growth rate compared with un-treated larvae. The differences between Consumption Index (CI mg) of larvae treated with Hramal and Hargal after five days of feeding in comparison with un-treated larvae were significant. Efficiency of Conversion of Ingested food (ECI%) to biomass reached 31.81±1.49, 26.06±1.89 and 48.67±1.54 after five days of treatment by Oshar, Harmal and Hargal, respectively. These values were 49.61±1.72, 39.12±0.54 and 53.20±0.96 for digested food utilization (ECD%) in larvae treated with the aforementioned extracts after five days, respectively. There was a remarkable inhibitory activity of plant extracts on the digestive carbohydrate enzymes, amylase and invertase in vitro. It was noticed that Harmal had a remarkable inhibitory action causing an average of 42.58% inhibition rate on amylase and 16.27% on invertase followed by Hargel and Oshar with inhibition rates of 33.27 and 19.58% against amylase, while these values averaged 11.19 and 5.97% of inhibition in case of invertase, respectively.
Effect of Magnetohydrodynamic on Thin Films of Unsteady Micropolar Fluid through a Porous Medium  [PDF]
Gamal M. Abdel-Rahman
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.211160
Abstract: In This paper, we deal with the study of the effect of magnetohydrodynamic on thin films of unsteady micropolar fluid through a porous medium. These Thin films are considered for three different geometries. The governing continuity, momentum and angular momentum equations are converted into a system of non-linear ordinary differential equations by means of similarity transformation. The resulting system of coupled non-linear ordinary differential equations is solved numerically by using shooting method. A representative set of numerical results in the three thin film flow problems for velocity and micro-rotation profiles are discussed and presented graphically. A comprehensive parametric study is carried out to show the effects of the micropolar fluid parameters, magnetic field parameter, permeability parameter and etc. on the obtained solutions.
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