Ashraf Amin

Zhengzhou University

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William S. Epling

University of Virginia

Eric Croiset

University of Waterloo

Mona A. Abdel‐Fatah

National Research Centre

Heba Abdallah

National Research Centre

Ghada A. Al Bazedi

American University in Cairo

G. El Diwani

National Research Centre

Zuhair Malaibari

King Fahd University of Petroleum and Minerals

N.N. El-Ibiari

National Research Centre

Anis H. Fakeeha

King Saud University

Abdelrahman G. Gadallah

Imam Mohammad ibn Saud Islamic University

Cooperative Institutions

National Research Centre

National Water Research Center

Universidade Federal de Santa Catarina

University of Waterloo

King Saud University

University of Technology Malaysia

Riyadh Elm University

Sharda University

Universidade Federal da Fronteira Sul

Zhengzhou University

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Association of Sex Hormone Binding Globulin in Obese Male Adolescent as One of Cardiovascular Risk Factors

Deleted Journal (2022)

Mai Hafez Abdel Rahman Ashraf Amin Magdy I. Mohamed

insulin resistance, type 2 diabetes, hypertension,

Association (psychology)

10.21608/ejaps.2022.153413.1041

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Study on the characteristics of palm oil–biodiesel–diesel fuel blend

Egyptian Journal of Petroleum (2017)

R. El-Araby Ashraf Amin A.K. El Morsi N.N. El-Ibiari G. El Diwani

Palm oil/palm oil methyl esters are blends with diesel fuel, the blends were characterized as an alternative fuels for diesel engines. Density, kinematic viscosity, and flash point were estimated according to ASTM as key fuel properties. Palm oil and palm oil biodiesel were blended with diesel. The properties of both blends were estimated. The results showed that the fuel properties of the blends were very close to that of diesel till 30% unless other characteristics are within the limits. The experimental data were correlated as a function of the volume fraction of oil/biodiesel in the blend. Different correlations were developed to predict the properties of the oil/bio-oil-diesel blends based on our experimental results. The developed correlations were validated by comparing the correlation prediction with experimental data in literature. A good agreement was found between modeled equations prediction and experimental data in literature. The developed equations can be used as a guide for determining the best blending mixture to be used for diesel engines.

Flash point

Fuel oil

Cooking oil

10.1016/j.ejpe.2017.03.002

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Citations (93)

Model of Aeration Tank for Activated Sludge Process

Recent Innovations in Chemical Engineering (Formerly Recent Patents on Chemical Engineering) (2019)

Ashraf Amin S. Hawash Mona A. Abdel‐Fatah

Background and Objective: A model for the activated sludge aeration reactor is developed to study the effect of operating conditions on biodegradable organic pollutants treatment. Methods: The model was developed and fitted using an experimental study conducted for wastewater collected from meat processing industrial units in Egypt. Inlet biomass and substrate concentrations are the operating parameters considered in our study. Results: After treatment; biomass outlet concentration was reduced substantially. After reaching steady-state operation, outlet biomass concentration was not affected by the inlet biomass concentration, while outlet substrate concentration showed great dependency on the inlet substrate concentration. The model agrees well with the experimental data collected from an industrial activated sludge treatment unit. Conclusion: By varying process parameters, the model can be used effectively to predict and optimize the system behavior under different operating conditions. Varying the substrate concentration may lead to optimizing the process conditions for the system under study.

10.2174/2405520412666190828210125

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Model and protected design of water piping system to minimize the water hammer effect

Egyptian Journal of Chemistry (2021)

Mona A. Abdel‐Fatah Ashraf Amin Ghada A. Al Bazedi

The effect of the water hammer is investigated to predict the water hammer effect in a wastewater pipeline and to develop the piping system design to overcome the predicted effect.The piping system is sensitive to any effects of the water hammer phenomenon.The sudden change in pressure within pipes or conduits used to transport liquid under pressure may result in serious damage.A modified numerical approach is developed to predict the water hammer effect.The system under study was modified to handle and reduce the effect of water hammer.By calculating the water hammer's effect, the safe piping system design can be developed.A model was developed to predict the effect of water hammer and the expected pressure drop/increase across the piping system.The pipe properties and measured pressure are the model operating parameters.The maximum and minimum pressure envelopes across the piping system were calculated.By simulating the power failure and/or pump shut down, the model showed a good prediction for the effect of piping system design variations.The optimum design for the piping system was developed and presented.

Water hammer

Hammer

10.21608/ejchem.2021.89951.4299

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Could nebulized heparin be the magic treatment for COVID-19 Pneumonia and ARDS?

Journal of Anesthesia & Critical Care Open Access (2021)

Khaled Sewify Ahmed R El-Karamany Shoala Abdelaziz Alshaer Ashraf Amin Rehab Y. Al‐Ansari

Background: The global spread of the novel strain of coronavirus referred to as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has resulted in the continuous rise in the hospitalization of people suffering from COVID-19 in various parts of the world. The predominant symptoms experienced by patients diagnosed with SARS-CoV-2 infection include pneumonia and acute respiratory distress syndrome (ARDS). These symptoms have contributed to the high mortality rate of COVID-19 patients across the globe. Recent studies have indicated that nebulized unfractionated heparin (UFH) can be employed in the treatment of pneumonia and acute respiratory distress syndrome (ARDS) in hospitalized patients who have been diagnosed with SARS-CoV-2 infection. Case description: The case study for this investigation was a 37-year-old Saudi woman who had muscular dystrophy, bronchial asthma, and diabetes mellitus. This hospitalized patient who was a wheelchair bound was admitted to the intensive care unit (ICU) due to the onset of severe COVID-19 related pneumonia and ARDS. The patient was intubated and placed on high mechanical ventilation support with protective lung strategy (low tidal volume and high PEEP level), prone positioning, administering inhaled nitric oxide therapy, and the intravenous infusion methylprednisolone together with antiviral agents and empiric antibiotics for seven days. Despite the administration of this maximal therapy, she continued to have refractory hypoxemia and severe ARDS. As a result, a high dose of UFH was administered to the patient through nebulization. After administering nine different doses of nebulized UFH, the patient’s oxygenation and inflammatory markers have remarkably improved, then she had a very smooth course and successfully weaned off mechanical ventilation. Conclusion: This treatment strategy resulted in a significant improvement in the P/F ratio, a remarkable reduction in the bilateral lung infiltrates and inflammatory markers and eventually weaning of mechanical ventilation in the COVID-19 patient. This case suggests that nebulized UFH has a strong scientific and biological basis to test its use as a therapy for COVID-19 pneumonia and ARDS as it may offer huge clinical benefit across the time course of the disease as well may prevent progression of infection If administered early at the onset of symptoms, and may finally prevent the needs for mechanical ventilation. Learning points: Randomized controlled trials should be carried out to investigate the clinical impacts of nebulized UFH in both prevention and treatment of COVID-19 pneumonia/AERDS.

10.15406/jaccoa.2021.13.00494

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Review of autothermal reactors: Catalysis, reactor design, and processes

International Journal of Hydrogen Energy (2024)

Ashraf Amin

Reactor design

10.1016/j.ijhydene.2024.03.372

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Citations (6)

Factors affecting the bond strength between new and old concrete

Journal of Advanced Engineering Trends (2021)

Ashraf Amin Osama Ahmed Mohamed Salah Gamal

One of the main concerns in repair is a sufficient bond between the substrate and the repaired material, especially for the long-term performance and durability of the structure.We carried out in this study an experimental work to investigate the effect of main parameters that primarily influence the bond between old and new concrete in dry, hot weather.The compressive strength considered for the case of old concrete is 15 MPa.While for the case of the new concrete, the considering compressive strengths as 15, 30, 40, and 50 MPa.We cast a total of 48 cube samples (10×10×10 cm) and tested them for the grade of old concrete, the new concrete as a jacket in both faces of the old one.We prepared the substrate surface by grinding.We cast the new concrete over the old concrete where four cases of the bond between old and new concrete considered included using bond agent, using dowels, using bond agent and dowels, and without using bond agents or dowels.The samples were saved in the oven at 50 0 C for 28 days till the test day.Test results indicated that using new concrete with higher compressive strength slightly affected the bond between old and new concrete.While using a bond agent or dowels remarkably influenced the bond between old and new concrete and gave the same results, but using both gave maximum shear strength than other considered cases.

10.21608/jaet.2021.85707.1118

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Citations (6)