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Search Results: 1 - 10 of 90036 matches for " Ghada I. MAHMOUD "
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Cultivating Microalgae in Domestic Wastewater for Biodiesel Production
Notulae Scientia Biologicae , 2012,
Abstract: The objective of this study was to evaluate the growth of nine species of microalgae (green and blue green microalgae) on domestic waste water samples obtained from Zenein Waste Water Treatment Plant (ZWWTP), Giza governorate, Egypt. The species were cultivated in different kind of waste water; before treatment; after sterilization; with nutrients with sterilization and with nutrients without sterilization. The experiment was conducted in triplicate and cultures were incubated at 25±1°C under continuous shaking (150 rpm) and illumination (2000 Lux) for 15 days. pH, electric conductivity (EC), optical density (OD) , dry weight (DW), were done at the time of incubation and at the end of experiment, in addition to determine the percentage of lipid and biodiesel. The data revealed that, domestic waste water with nutrient media (T3) was promising for cultivation of five algal species when compared with conventional media, Moreover, domestic waste water after sterilization (T2) was selected media for cultivation of Oscillatoria sp and Phormedium sp. However, T1 media (waste water without treatment) was the promising media for cultivation of Nostoc humifusum. The biodiesel produced from algal species cultivated in waste water media ranged from 3.8 to 11.80% when compared with the conventional method (3.90 to 12.52%). The results of this study suggest that growing algae in nutrient rich media offers a new option of applying algal process in ZWWTP to mange the nutrient load for growth and valuable biodiesel feedstock production.
Rapid Urease Test and Faecal Antigen Detection for Rapid Diagnosis of Helicobacter pylori Infection in Dyspepsia  [PDF]
Hasan Sedeek Mahmoud, Hanan M. Fayed, Ghada S. Osman
Open Journal of Gastroenterology (OJGas) , 2016, DOI: 10.4236/ojgas.2016.61002
Abstract: Background: Helicobacter pylori (H. pylori) is considered as one of the most prevalent gastric infections which cause chronic gastritis and predispose to cancer stomach. So, diagnosis and eradication should be rapid to decrease the risk of gastric cancer. Aim of the study: To evaluate the role of rapid urease test (RUT) and faecal antigen test (FAT) added to serological test for rapid diagnosis of active H. pylori infection. Patients and methods: 270 patients with dyspepsia and positive serology for H. pylori infection were included. Two antral and two corporal gastric biopsies were taken for RUT and Histopathological examination. Fresh stool samples were obtained from all patients for FAT. Results: The mean age of the studied patients was 45 ± 25. H. pylori infection was found in 256 (94.8%) of the included patients: 236 (92.18%) with positive all tests, 5 (1.95%) with positive both RUT and FAT, 8 (3.12%) with positive both histology and RUT and 7 (2.73%) with positive histology and FAT. The sensitivity, specificity and positive predictive values for RUT were as follows: 97.27%, 85.71% and 99.20% respectively and 96.88%, 85.71% and 99.20% respectively for FAT. Conclusions: RUT or FAT in patients with positive serological test could be used for rapid diagnosis of active H. pylori infection with good sensitivity and specificity without waiting for the results of histology or culture.
Validity of the Modified Checklist for Autism in Toddlers (M-CHAT): Preliminary Study in Eastern Province of Saudi Arabia  [PDF]
Mahmoud M. Rashad, Ghada Abd Razek, Ghada Reffat
Open Access Library Journal (OALib Journal) , 2015, DOI: 10.4236/oalib.1101951
Abstract: Objective: To examine the concurrent and criterion validity of The Modified Checklist for Autism in Toddlers (M-CHAT) in Eastern Province, Saudi Arabia. Methods: Two groups, comprising 35 Autistic children previously diagnosed with autism, 113 children without Autistic Disorders. They were selected from different clinical settings: Primary care Clinic, Shumua Al Amal Private Day Care Central for Mental Disable-Dammam and the child psychiatric Clinic of AL Amal Complex for Mental Health-Dammam. To determine the Concurrent validation, ANOVA and discriminate analysis were used to compare the significant different between samples, Control group (normal) and the experimental group (autistic). The Correlation Matrix was used to establish the internal consistence of the (M-CHAT) items and to examine the criterion validity. Results: The mean total score was significantly higher in the group of autistic children than in the other group. In the items of swing, interesting, climbing, playing peek-doo, pretending, Asking, using fingers, Playing with toys, Bringing objects, Over sensitive auditory, Reactive response, Response, Imitation, Pointing, looking, Attention, Deaf, Understanding, Staring & wandering, and Reaction checking. The Reliability Coefficients of items by Alpha = 0.8123 indicates high sensitivity and specificity of M-CHAT, while the content Validity (internal consistence) shows 162 correlation coefficient between the items indicating high validity of M-CHAT. Conclusions: The Modified Checklist for Autism in Toddlers (M-CHAT) shows promise as an instrument for identifying children with autistic disorders, in primary care clinic for early detection.
Determination of the Electromagnetic Field Created by Line Current and Sheet Current Source at the Earth’s Surface  [PDF]
Ghada M. Sami, Maryam I. Al-Nami
International Journal of Geosciences (IJG) , 2014, DOI: 10.4236/ijg.2014.513129
Abstract: The electromagnetic field that generated by line current and sheet current at the surface of the earth can be expressed in analytical form. The line current created at the earth’s surface by an infinitely long line current is given by the inverse Fourier integrals over a horizontal wave number. The sheet current can be obtained by integrating the line current expansions using a Neumann and Struve functions; these functions have known mathematical properties, including the series expansions. The series expansions are exact with neglecting the displacement currents. Assuming a uniform earth and that there is no propagation, the three nonzero field components can be expressed in terms of the Neumann and Struve functions. The integrals of line current expansions are calculated by using the numerical methods. The results represented graphically and illustrated by figures. Results can be used to evaluate numerical solutions of more complicated modeling algorithms.
Mahmoud Mezghani,Raja Gatgout,Ghada Ellouze,Amal Grati
International Journal of Distributed and Parallel Systems , 2011,
Abstract: In recent years, the use of wireless sensor network invade various areas (domotic/home automationfields, medical, industrial …), which sets up several applications such as control of energy consumptionin the habitat, home entertainment system, security system of the intelligent home, health care, … Eachapplication employed its own platform what restore the system very complex. For thus and in this paper,we proposed only one platform for all applications, that’s qualified to generate endless tasks. It coversmany commands developed with a generic remote control interface created by C# language. This genericinterface is very adaptable & adjusts oneself to TinyOS operating system requirements and able to beaccessed via Internet using 6LoWPAN protocol. Validate the proper operation of this generic platformmulti-tasking is approved on several levels:at the implementation of a proposed solution to control energy consumption in the smart home which thesuggested solution is based on the techniques of scheduling under constraints of resources; at theautomation of habitat and in the overall context of the intelligent home and the other to improve thequality of life and make it more comfortable ;across of the practical assistance and to set monitoring ofthe patient and to keep track of his statement by the doctor and that, whether at home or in the route tothe hospital or in the hospital.
Ultrasonographic Characteristics of Diabetes Impacts in Kidneys’ Morphology  [PDF]
Mohammed A. Ali Omer, Ayman H. Eljack, Mohamed E. M. Gar-alnabi, Mustafa Z. Mahmoud, Muatasim Elseid, Ghada A. Edam
Open Journal of Radiology (OJRad) , 2014, DOI: 10.4236/ojrad.2014.44039
Abstract: A total sample size consisting of 150 Diabetic male patients has been investigated by ultrasound system General Electric using gray-scale B-mode imaging with curvilinear transducer 3 MHz to assess the impact of diabetes in kidney morphology and it is distributed in Sudan. The collected data were the patient age, height, weight, kidneys size, ultrasound findings of involved kidneys, and duration of diabetes and residence region. The analyzed data show that the diabetes has been as endemic disease in central Sudan (Khartoum & Jazeera) representing 55% and in the west of Sudan representing 38%. The BMI of diabetic patients has been significantly (R2 = 0.6) decreasing following aging. The kidney size increases significantly as R2 = 0.75 and 0.6 for left and right kidney respectively. Their correlation is fitted in the following equations: y = 3.95x + 27.26 and y = 2.41x + 35.12 for the left and right kidney respectively. The impact of duration was a reduction in size significantly as R2 = 0.61 and 0.55 with a correlation fitted in the following equations: y = 2.22x + 139.9 and y = 1.51x + 96.59 for the left and right kidney respectively. The mean kidney length was (14.5 cm) and the renal cortex in the range of 2 - 2.3 cm, the kidneys size were so enlarged as 92.4 ± 11.7 and 121 ± 17.1 for the right and left kidney respectively while in late case of Diabetes, the kidney is more echogenic, atrophied size with loss of corticomedullary differentiation.
Role of Serum Zinc Level and P300 Event Related Potential in Detection of Minimal Hepatic Encephalopathy  [PDF]
Ghada M. Galal, Mahmoud Saif-Al-Islam, Mohammed Abd Al-Ghafar Abd Al Rahman, Nagwa S. Ahmed, Mona M. Abd El Rhman
Open Journal of Gastroenterology (OJGas) , 2015, DOI: 10.4236/ojgas.2015.56011
Abstract: Background: Minimal hepatic encephalopathy (MHE) is defined as hepatic encephalopathy (HE) without symptoms on clinical/neurological examination, but with deficits in some cognitive areas that can only be measured by neuropsychometric testing. Aim: Our aim was to study serum zinc levels in cirrhotic patients with and without MHE and correlate it with the results of neuropsychological tests and P300 event related potential. Patients and Methods: Fifty-five patients with liver cirrhosis were recruited for the present study. All patients were subjected to full history taking, clinical examination, abdominal ultrasonography, laboratory investigations including liver function tests and serum zinc, psychometric studies (line tracing test and serial dotting test) and P300 event related potential. According to the results of psychometric studies and P300 event related potential, the patients were divided into 3 groups in addition to the control group. Results: Among the 55 patients included in the study, 30 patients had no clinical evidence of HE and 25 patients had overt HE with different grades. In patients with no clinical evidence of HE, psychometric tests and P300 event related potential revealed that 13 patients had MHE, while 17 had no HE. There were significantly lower serum zinc levels in patients with MHE and in cirrhotic patients without HE compared with the healthy controls. Also, zinc levels were significantly lower in higher grades of hepatic encephalopathy. Serum zinc levels showed positive correlation with serum albumin levels and inverse correlation with serial dotting test and P300 latency. Conclusion: Reduced serum zinc level and prolonged P300 latency can serve as predictors of minimal hepatic encephalopathy in cirrhotic patients. Zinc deficiency is common in cirrhotic patients with MHE. These findings may have important prognostic and therapeutic implications in MHE and overt HE patients with zinc deficiency.
Stereoselective High-Performance Liquid Chromatography Tandem Mass Spectrometry Method for Determination of R- and S-Acenocoumarol in Human Plasma and Its Application in a Pharmacokinetics Study  [PDF]
Isam I. Salem, Mahmoud Abdullah, Naji Najib
American Journal of Analytical Chemistry (AJAC) , 2015, DOI: 10.4236/ajac.2015.63020
Abstract: A stereoselective, sensitive and rapid liquid chromatography-tandem mass spectrometry (LC-MSMS) method for the determination of R-acenocoumarol and S-acenocoumarol in human plasma was developed and validated at IPRC bioanalytical labs. The procedure involved solid phase extraction of both enantiomers and their corresponding internal standard. The chromatographic separation was accomplished employing a chiral column and proper mobile phase. Detection was carried out using Waters Micromass® Quattro Premier mass spectrometer in multiple reaction monitoring (MRM) mode using turbo ion spray with negative ionization. The method was validated over a linear range of 0.40 - 40.00 ng/ml for R-acenocoumarol and 0.20 - 20.00 ng/ml for the S-acenocoumarol. Method validation covered different parameters such as linearity, accuracy, precision and stability. The method was successfully applied for the determination of R and S-acenocoumarol in plasma samples of 28 healthy subjects who participated in a pharmacokinetics study.
EFL Students’ Reluctance in Participating in English Speaking Activities at University College of Applied Sciences: Challenges and Solutions  [PDF]
Alaa I. Murad, Mahmoud O. Jalambo
Open Journal of Social Sciences (JSS) , 2019, DOI: 10.4236/jss.2019.73003
Abstract: This study tackles the main reasons behind EFL students’ reticence in participating in speaking activities in the English language classrooms at the University College of Applied Sciences (UCAS) in Gaza, Palestine. As an emerging issue in the field of teaching and learning English, speaking reticence has attracted the attention of many researchers whom focused on the Asian context of learning English, particularly in China and Japan. Therefore, the researchers decided to investigate this issue in the Gaza Strip in Palestine in specific. Through a questionnaire distributed on 140 participants from different departments and specializations at UCAS, the researchers were able to collect data for the study analysis, which adopted mixed method. The qualitative results supported the quantitative ones, so that the study outcomes would be helpful to decrease the Palestinian students’ speaking reticence and to be taken into consideration for further research studies.
A New Potentiometric Sensor for Determination of Pethidine hydrochloride in Ampoules and Urine  [PDF]
Hazem M. Abu-Shawish, Nasser Abu Ghalwa, Ghada I. Khraish, Jehad Hammad
American Journal of Analytical Chemistry (AJAC) , 2011, DOI: 10.4236/ajac.2011.21006
Abstract: A simple, precise, rapid and low-cost potentiometric method for pethidine determination in pharmaceuticals and urine is proposed. A chemically modified carbon paste electrode (CMCPE) for pethidine hydrochloride (PDCl) based on pethidine-phosphotungstate (PD-PT) as ion-pair complex was prepared and fully character-ized in terms of composition, usable pH range, response time and temperature. The pethidine electrode showed Nernstain responses in the concentration range 2.1 × 10–6-1.0 × 10–2 M with a detection limit of 7.3 × 10-7 and usable within the pH range 3.5-6.6. This sensor exhibited a fast response time (about 5-8 s), good stability. The value (dE/dt) of the electrode was found to be 0.00071 V/?C, which indicates fairly high ther-mal stability. Selectivity coefficients determined by matched potential method (MPM) and separate solution method (SSM) showed high selectivity for PDCl with respect to a large number of inorganic cations, organic cations, sugars and some common drug excipients. The sensor could be used successfully in the estimation of PDCl in ampoules and in spiked urine samples.
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