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Search Results: 1 - 10 of 10196 matches for " Ibrahim Abdel-Rahman "
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Misuse of prophylactic antibiotics and prevalence of postoperative wound infection in obstetrics and gynecology department in a Sudanese hospital  [PDF]
Abubaker Ibrahim Elbur, M. A. Yousif, Ahmed S. A. El Sayed, Manar E. Abdel-Rahman
Health (Health) , 2014, DOI: 10.4236/health.2014.62025
Abstract: Purpose: This study was conducted to audit prophylactic antibiotic use and to quantify the rate of wound infection. Methods: Across-sectional prospective study was conducted in the Obstetrics and Gynecology Department in Khartoum Teaching Hospital, Sudan during March 1st to 31st October 2010. All Patients (aged >18 years) were included. Results: Overall 725 patients were included. The performed surgical procedures were 751; of these 578 (76.9%) were Caesarean sections. Overall rate of wound infection was 7.8%. The rate of wound infection among patients operated on for caesarean section and abdominal hysterectomy was 8.3%, and 9.2%, respectively. Multivariate logistic analysis showed that body mass index [BMI] ≥ 30 kg/m2 OR 2.1, 95% CI (1.1 - 4.0), (P = 0.019) was the major independent risk factor for occurrence of wound infection. Evaluation of prescriptions’ parameters against the stated criteria showed that 113 (15.8%) patients were given antibiotics with adequate spectrum of activity, 611 (85.3%) given sub-dose/s, 83 (11.6%) received the first preoperative dose/s in a proper time window, and 716 (100%) had prophylaxis for extended duration. Overall conformity to the stated criteria for the evaluation of prescription’s parameters was not achieved in all prescriptions. Conclusions: In this setting, antibiotics were irrationally used and wound infection rate was high, and the situation calls for multiple interventions to correct the situation, through the activation of the infection control committee in the hospital and development of antimicrobial subcommittee to develop policies for the use and auditing of prophylactic antibiotics.
Physiological Studies on the Effect of Fenugreek on Productive Performance of White New-Zealand Rabbit Does  [PDF]
Hassan Abdel-Rahman, Said Ibrahim Fathalla, Mohamed Ezzat Assayed, Shimaa Ramadan Masoad, Abeer Abdelaleem Nafeaa
Food and Nutrition Sciences (FNS) , 2016, DOI: 10.4236/fns.2016.713117
Abstract: The objective of the current work is to investigate the possible beneficial effects of forced feeding of fenugreek to rabbit does on their milk composition, milk yield, anemia screening parameters, immunity and the growth performance of bunnies. Twenty white New Zealand female rabbits were randomly assigned into 5 groups: normal control and 4 treated groups (vehicle (molasses), fenugreek powdered seeds + molasses, sprouted fenugreek + molasses, and fenugreek oil + molasses). All treated groups took the given doses orally for two days before parturition and 13 days after parturition for 2 successive pregnancies. Blood samples were collected from each doe on the 13th day of lactation for determination of hematological, biochemical and immunological parameters. Milk samples were taken for evaluation of milk composition. All rabbit does and their bunnies were weighed for calculation of the milk yield. The fenugreek seeds and oil administered groups (G3 & G5) recorded the highest percent values of fat, protein, lactose, total solids and solid not fat contents of the rabbits’ milk in both 1st and 2nd lactation periods relative to other tested groups. At the beginning and mid of lactation periods, the milk yields recorded non-significant differences either between tested groups or between 1st and 2nd pregnancy in the same group. Whereas, at the end of lactation, germinated seeds (G4) and oil (G5) treated groups recorded significantly higher rates of milk yield relative to control and fenugreek seeds groups. Bunnies’ body weights suckling from dams of group III (G3) recorded the highest weights relative to other tested groups in both 1st and 2nd pregnancy. During the 1st lactation period, all experimental groups showed significant reduction of white blood cells, while, G3 and G4 recorded significant elevation during 2nd lactation period. Rabbits treated with fenugreek seeds powder (G3) showed a significant raise of phagocytic activity and phagocytic index. Fenugreek seeds group (G3) and germinated one (G4) showed significant red blood corpuscles and packed cell volume raise relative to other groups during both 1st and 2nd lactation periods.
Evaluation of Angiopoietin-2 Serum Level as a Marker of Cardiovascular Risk in Children with Chronic Kidney Disease  [PDF]
Manal Abdel-Salam, Asmaa Abd EL Wakeel, Soheir Ibrahim, Tagreed Abdel-Rahman, Hend Ezzat, Randa Sabour
Open Journal of Nephrology (OJNeph) , 2015, DOI: 10.4236/ojneph.2015.54016
Abstract: Background: Cardiovascular complications are a major clinical problem in uremic patients accounting for 44% of all deaths in this population. Angiopoietin cytokines are involved with controlling micro vascular permeability, vasodilatation and vasoconstriction by signaling smooth muscle cells surrounding vessels. Aim: To assess Angiopoietin-2 serum level as an early marker of cardiovascular risks in children with chronic kidney disease on regular hemodialysis and correlate with intimal medial thickness and echo data in those children. Patients and methods: The study included 40 children with CKD on regular hemodialysis (HD), and they were selected from the hemodialysis unit of Al-Zahraa Hospital, Al-Azhar University, during the period from December 2014 to April 2015. Another group of 40 apparently healthy children, matches age and sex with patients group as a controls. Angiopoietin-2 serum level, Doppler ultrasound (U/S) to assess: intima-media thickness (IMT) and the peak systolic velocity (PSV) of the main arteries including the (aorta, carotid and femoral) arteries, conventional echo and tissue Doppler imaging (TDI) of mitral and tricuspid annular velocities are obtained for both groups. Results: Children on regular HD have significantly higher (Angiopoietin-2) serum level compared to their controls, and it is (161.35 ± 38.30 ng/ml) and (9.25 ± 12.64 ng/ml) respectively (p, 0.000) and increases in the aorta, carotid and femoral (IMT) with significant increase in their mean systolic velocities in patients group compared to the controls. Significant increase in tricuspid valve late diastolic velocity (TVA vel m/s) and (E/e’ ratio) obtained by (TDI), its abnormalities threshold is detected in patients group than controls, with significant increase right ventricular systolic pulmonary pressure in patients compared to the controls. Conclusions: Higher prevalence of right ventricular dysfunction is detected by conventional and TDI echo in children on hemodialysis. Angiopoietin-2 can be used as an ideal biomarker which may progress to play an adjunctive role with echocardiography in assessing cardiovascular risk of children with CKD on regular hemodialysis.
Sesame Husk as Adsorbent for Copper(II) Ions Removal from Aqueous Solution  [PDF]
Haitham Ahmed El-Araby, Abel Moneim Mohamed Ahmed Ibrahim, Ahmed Hashem Mangood, Adel A.-H. Abdel-Rahman
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.57011
Abstract: In this study, the adsorption behavior of copper(II) ions from aqueous solutions onto sesame husk (SH) was investigated. The effect of different parameters such as pH, contact time, adsorbent dosage, adsorbate concentration, temperature and agitation speed was studied. Thermodynamic parameters, equilibrium isotherms and kinetic data have been evaluated. The functional groups and surface morphology of SH adsorbent were characterized by FTIR and SEM. Adsorption equilibrium isotherms were expressed by Langmuir, Freundlich and Dubinin-Radushkevich (D-R) adsorption models and it was found that Langmuir adsorption model fits the experimental data better than Freundlich and D-R models. The adsorption can be best described by the pseudo second-order kinetic model.
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.
Mean Platelet Volume and Prognosis of Unstable Angina  [PDF]
Tarek M. Abdel-Rahman
World Journal of Cardiovascular Diseases (WJCD) , 2015, DOI: 10.4236/wjcd.2015.52005
Abstract: Objective: Clopidogrel therapy is the standard of care in patients with unstable angina. However, a percentage of subjects are nonresponders to clopidogrel and this leads to increased adverse outcome. On the other way round, some responsive patients are exposed to bleeding complications. Detection of both in daily practice is important in order to tailor the treatment protocol. In this study we aimed to estimate the cutoff value of mean platelet volume (MPV) for both platelet responsiveness and bleeding risks. Methods: The study was planned as a prospective cohort study. A total number of 230 patients admitted to our CCU with unstable angina over a period of one year (from June 2013 to May 2014) were enrolled. Exclusion criteria were: severe anemia, throm-bocytopenia, myelodysplastic syndrome, coagulopathy and recent blood transfusion. In all patients clopidogrel was initially started and maintained during the hospital stay. Blood (2 ml) was collected in dipotassium EDTA tubes from all patients on the first day of admission by a clean puncture. Samples for MPV analysis were drawn on admission, and analyzed within 1 hour of admission after sampling by Beckman Caulter LH 780 Analyzer. Grouping was then done according to MPV of the patients into group (I) who had a low MPV less than or equal to 7.00 fl, and group (II) with MPV equal to or higher than 9.00 fl. Demographical and clinical variables of the patients were recorded. Routine laboratory parameters were also recorded. Clinical manifestations during the admission period were meticulously reported. Major complications as bleeding or, urgent need for percutaneous coronary intervention (PCI) were also studied. Results: Among the 230 patients analyzed, 175 patients (76%) were found to have MPV ≤7.00 fl (group (I)) and 55 patients (24%) had MPV ≥9.00 fl (group (II)) with mean ± SD MPV (8.4 ± 1.5 fl, vs 11.7 ± 1.2 fl respectively) (p < 0.001). Observation of clinical course during admission period revealed a statistically more significant clinical deterioration in group (II) than group (I) and the presence of more frequent AMI cases in group (II) having a high MPV. A high cutoff value of 9.7 fl for MPV was detected in prediction of clopidogrel nonresponsiveness (group (II)) with a sensitivity of 78.2% and specificity of 66.8%, and a low cutoff value for bleeding tendency lower than 6.3 fl was detected in group (I) with a sensitivity of 71.4% and specificity of 62.5%. Conclusion: This study showed that MPV can be used as a simple bedside predictor for detection of clopidogrel
New Polymer Syntheses Part 57: Thermally Stable New Ferrocene-Polyazomethines, Synthetic Methodology, and Characterization
Mona Ahmed Abdel-Rahman,Mahmoud Ali Hussein,Kamal Ibrahim Aly,Abdelwareth Abdel-Haleam Sarhan
Journal of Chemistry , 2013, DOI: 10.1155/2013/198652
Abstract:
Inhibition of Mild Steel Corrosion by 3-Benzoylmethyl Benzimidazolium Hexafluoroantimonate in Acidic Solution
Ayssar Nahlé,Ideisan I. Abu-Abdoun,Ibrahim Abdel-Rahman
International Journal of Corrosion , 2012, DOI: 10.1155/2012/246013
Abstract: The corrosion inhibition of mild steel in 1?M HCl solution by a synthesized compound (3-benzoylmethyl benzimidazolium hexafluoroantimonate) was investigated electrochemically and by weight loss experiments. The concentration of this inhibitor ranged from ?M to ?M. The effect of temperature (from 303 to 343?K) and concentrations (from ?M to ?M) were investigated. The percentage inhibition increased with the increase of the concentration of the inhibitor and reached about 98% at the concentration of ?M at 303?K. The percentage inhibition decreased with the increase of temperature. The thermodynamic parameters for the adsorption of this inhibitor on the metal surface were calculated. This compound was found to be a very good corrosion inhibitor due to the presence of nitrogen in benzimidazole and phenyl ring. 1. Introduction The corrosion of metals is a serious problem in many industries, installations, and civil services such as water and sewage supplies. One of the most useful and practical methods that used to control and protect metals against corrosion is the use of inhibitors, especially in acidic media. Not only the costs due to corrosion increase rapidly, but also the efficiency of the plants and the quality of the products are also reduced. Most inhibitors are organic compounds containing polar groups strongly adsorbed on the metal surface [1, 2]. These inhibitors, which include the organic N, P, S, and OH groups, are known to be similar to catalytic poisons, as they decrease the reaction rate at the metal/solution interface without, in general, being involved in the reaction considered. It is generally accepted that most organic inhibitors act via adsorption at the metal/solution interface. The mechanism by which an inhibitor decreases the corrosion current is achieved by interfering with some of the steps for the electrochemical process. The corrosion inhibition of mild steel in aggressive acidic solutions has been widely investigated. In industries, hydrochloric acid solutions are often used in order to remove scale and salts from steel surfaces, and cleaning tanks and pipelines. This treatment may be prerequisite for coating by electroplating, galvanizing, or painting techniques. The acid must be treated to prevent an extensive dissolution of the underlying metal. This treatment involves the addition of some organic inhibitors to the acid solution that adsorb at the metal/solution interface by displacing water molecules on the surface and forming a compact barrier film. Nitrogen-containing compounds as metal corrosion inhibitors have been
UAE Neem Extract as a Corrosion Inhibitor for Carbon Steel in HCl Solution
Ayssar Nahlé,Ideisan Abu-Abdoun,Ibrahim Abdel-Rahman,Maysoon Al-Khayat
International Journal of Corrosion , 2010, DOI: 10.1155/2010/460154
Abstract: The effect of aqueous extract of UAE Neem (Azadirachta Indica) on the corrosion inhibition of carbon steel in 1.0?M HCl solution was investigated electrochemically, and by weight-loss experiments at temperatures ranging from 303 to 343?K. The percentage inhibition increased with the increase of the concentration of the inhibitor. At a concentration of 2.0?g/L, the percentage inhibition reached about 87% at room temperature and 80% at 303?K. The percentage inhibition decreased with the increase of temperature. The thermodynamic parameters for the adsorption of this inhibitor on the metal surface were calculated using the Temkin adsorption isotherm. The aqueous Neem leaves extract was found to be an excellent potential corrosion inhibitor because of the high content of tannin content as well as the presence of a series of complex triterpene glycosides. 1. Introduction The corrosion of metals in many industries, constructions, installations, and civil services such as electricity, water, and sewage supplies is a serious problem. In order to prevent or minimize corrosion, inhibitors are usually used especially in flow cooling systems. Organic, inorganic, or a mixture of both inhibitors can inhibit corrosion by either chemisorption on the metal surface or reacting with metal ions and forming a barrier-type precipitate on its surface [1]. Because of the toxic nature and/or high cost of some chemicals currently in use as inhibitors, it is necessary to develop environmentally acceptable and inexpensive ones. Natural products can be considered as a good source for this purpose. The aqueous extracts from different parts of some plants such as Henna, Lawsonia inermis [1], Rosmarinous officinalis L. [2], Carica papaya [3], cordia latifolia and curcumin [4], date palm, phoenix dactylifera, henna, lawsonia inermis, corn, Zea mays [5], and Nypa Fruticans Wurmb [6] have been found to be good corrosion inhibitors for many metals and alloys. Recently, an excellent review about “natural products as corrosion inhibitors for metals in corrosive media” has been published [7]. No studies have been reported on the aqueous extract of Neem leaves planted in UAE, Azadirachta indica, as corrosion inhibitor used in our present work, in terms of studying both the electrochemical effect and the temperature effect on the corrosion inhibition of carbon steel in 1.0?M HCl solution. Carbon steel was chosen in our studies since high temperature aggressive acids are widely used in industries in connection to carbon and low alloy steels. The aim of this work is to study, using
Effect of Temperature on the Corrosion Inhibition of Trans-4-Hydroxy-4′-Stilbazole on Mild Steel in HCl Solution
Ayssar Nahlé,Ideisan I. Abu-Abdoun,Ibrahim Abdel-Rahman
International Journal of Corrosion , 2012, DOI: 10.1155/2012/380329
Abstract: The inhibition and the effect of temperature and concentration of trans-4-hydroxy-4′-stilbazole on the corrosion of mild steel in 1?M HCl solution was investigated by weight loss experiments at temperatures ranging from 303 to 343?K. The studied inhibitor concentrations were between ?M and ?M. The percentage inhibition increased with the increase of the concentration of the inhibitor. The percentage inhibition reached about 94% at the concentration of ?M and 303?K. On the other hand, the percentage inhibition decreased with the increase of temperature. Using the Temkin adsorption isotherm, the thermodynamic parameters for the adsorption of this inhibitor on the metal surface were calculated. Trans-4-hydroxy-4′-stilbazole was found to be a potential corrosion inhibitor since it contained not only nitrogen and oxygen, but also phenyl and pyridine rings that are joined together with a double bond (–C=C–) in conjugation with these rings. 1. Introduction Organic compounds containing polar groups by which the molecule can become strongly or specifically adsorbed on the metal surface constitute most organic inhibitors [1, 2]. These inhibitors, which include the organic N, P, S, and OH groups, are known to be similar to catalytic poisons, as they decrease the reaction rate at the metal/solution interface without, in general, being involved in the reaction considered. It is generally accepted that most organic inhibitors act via adsorption at the metal/solution interface. The mechanism by which an inhibitor decreases the corrosion current is achieved by interfering with some of the steps for the electrochemical process. The corrosion inhibition of mild steel in aggressive acidic solutions has been widely investigated. In industries, hydrochloric acid solutions are often used in order to remove scale and salts from steel surfaces, and cleaning tanks and pipelines. This treatment may be prerequisite for coating by electroplating, galvanizing, or painting techniques. The acid must be treated to prevent an extensive dissolution of the underlying metal. This treatment involves the addition of some organic inhibitors to the acid solution that adsorb at the metal/solution interface by displacing water molecules on the surface and forming a compact barrier film. Many authors have used various nitrogen-containing compounds in their corrosion inhibition investigations. These compounds included quaternary ammonium salts [3–10], polyamino-benzoquinone polymers [11], azoles [12–19], substituted aniline-N-salicylidenes [20], amides [21], heterocyclic compounds [22, 23], and
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