MOHAMED EZZAT

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masood umer

Aga Khan University

Richard Sullivan

King's College London

Masood Jawaid

Dow University of Health Sciences

Ahmed El-Agwany

Alexandria University

Robert Gorman

University of Pennsylvania

GIUSEPPE NIGRI

Università degli Studi "La Sapienza" di Roma

Juanita Crook

University of British Columbia

Joseph Mills

Baylor College of Medicine

Avinash Supe

Maharashtra University Of Health Sciences,Nashik

Gouda M El-labban

Suez Canal University

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Papers by MOHAMED EZZAT

Correlation between Serum Uric Acid Level and Left Ventricular Ejection Fraction in Patients with Congestive Heart Failure

World Journal of Cardiovascular Diseases

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Efficacy of fluoride varnish containing xylitol coated calcium phosphate or potassium nitrate gel versus conventional fluoride varnish in management of hypersensitivity of exposed root surfaces in adult patients: A randomized clinical trial

International journal of health sciences

Objective: This clinical trial was conducted to compare the efficacy of fluoride varnish containi... more Objective: This clinical trial was conducted to compare the efficacy of fluoride varnish containing xylitol coated calcium and phosphate or potassium nitrate gel versus conventional fluoride varnish in the management of hypersensitivity of non-carious exposed root surfaces in adult patients. Material and Methods: 35 patients having 105 hypersensitive teeth were randomly allocated to be treated either using Embrace varnish (PULPDENT Corporation, Watertown, MA, USA) or UltraEz gel (Ultradent Products Inc. South Jordan, UT, USA) or Fluoride varnish FluoroDose (Centrix Inc., Milford, Connecticut, USA), all agents were used according to the manufacturers’ instructions. Hypersensitivity scores were assessed using the visual analogue scale (VAS), after applying different stimuli. The assessment was done at baseline, after 4 hours of application, after two days, then after 4, 8 and 12 months. Results: UltraEZ gel showed the best immediate relief with a significant difference from other trea...

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Cardio-Protective Effects of Oral Nicorandil in Patients Undergoing Cardiac Valve Surgery

World Journal of Cardiovascular Diseases, 2019

Background: Reduction of myocardial reperfusion injury during cardiopulmonary bypass is an essent... more Background: Reduction of myocardial reperfusion injury during cardiopulmonary bypass is an essential requirement for increasing the success rate, decreasing morbidity and mortality of open-heart surgery. Aim: To study the role of pre-operative oral nicorandil in decreasing reperfusion cardiac injury in patients subjected to cardiac valve surgery. Patients and Methods: The study included 62 patients, who were equally randomized into two groups: nicorandil group and control group. Pre-operative, intra-operative and postoperative data were reported and analyzed. Left Ventricle Ejection Fraction (LVEF) was estimated pre-operatively and postoperatively for both groups. Troponin I, creatine kinase-muscle/brain (CK-MB), interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-α) were measured before surgery by 24 hours then 4, 12 and 48 hours after aortic cross clamp removal. Results: Nicorandil considerably decreased TNF-α and IL-6 after 4 and 12 hours following the removal of aortic clamping. It also reduced troponin-I and CKMB at the same time points. However, there were no important changes in IL-6, TNF-α, troponin-I and CK-MB levels in control group in comparison to nicorandil group in the next 48 hours following the removal of aortic clamping. Conclusions: Pre-operative oral nicorandil expressively decreased myocardial reperfusion damage during open heart valve operations, this evidenced by the decrease in the postoperative use of inotropic drugs, considerable reduction of postoperative elevation of cardiac enzymes and inflammatory cytokines with no reported complications.

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Correlation between Serum Uric Acid level and Left Ventricular Ejection Fraction in Patients with Congestive Heart Failure

Sohag Medical Journal, 2018

Background: One of the risk factors of congestive heart failure that still under investigations i... more Background: One of the risk factors of congestive heart failure that still under investigations is hyperuricemia. It's still debatable whether it's an independent risk factor or it's just a consequence of other disorders associated with cardiovascular diseases like hypertension, diabetes and dyslipidemia. Objective: The aim of our study is to elucidate whether in patients with heart failure serum uric acid level correlated with left ventricular ejection fraction supporting the possibility that the detection of progressive hyperuricemia in these patients may be an indicator of deteriorating cardiac function. Methods: We conducted a prospective study that included 124 studied patients and 26 apparently healthy persons at Coronary care unit and Internal Medicine Department at Sohag University Hospitals. All studied populations were classified into four groups; v Group "I" patients being newly diagnosed heart failure, v Group "II" patients decompensated heart failure on regular treatment, v Group "III" patients decompensated heart failure but stopped their treatment from three months, v Group "IV" control group selected to our study healthy and age-matched subjects from 30 to 70 years old. Then we studied the association between left ventricular ejection fraction, the severity of congestive heart failure and the serum uric acid levels and the well-known conventional risk factor that include age, sex, BMI, positive family history, smoking, hypertension, diabetes and dyslipidemia then through logistic regression analysis we tried to identify the independent predictors of coronary artery diseases. Results: The mean finding in our study is the significant higher mean ± SD serum uric acid levels in patients with congestive heart failure (8.43±2.95) versus apparently healthy persons (5.55±1.48) with "P value = .02". When we adjusted the serum uric acid with others significant factors in the univariate analysis which were age, gender and smoking, serum uric acid was an independent risk factor "P value = .04". Another interesting finding is significant correlation between serum uric acid level and the severity of congestive heart failure "P value<0.001,correlation coefficient=.35", where, that high rates of serum uric acid levels were recorded in patients with severe congestive heart failure. The gold finding is significant correlation between serum uric acid level and left ventricular ejection fraction "P value<0.001, correlation coefficient=.35", where, that high rates of serum uric acid levels were recorded in patients with reduced ejection fraction. According to ROC analysis a uric acid level of 8.45 mg/dl was found to be the most appropriate cutoff point with the sensitivitv 62% and the specificity 75%. Conclusion: Higher serum uric acid levels are significantly correlated with the severity of congestive heart failure and left ventricular ejection fraction, as follows, the mean finding in our study is the significant higher mean ± SD serum uric acid levels in patients with congestive heart failure (8.43±2.95) versus apparently healthy persons (5.55±1.48) with "P value = .02". When we adjusted the serum uric acid with others significant factors in the univariate analysis which were age, gender and smoking, serum uric acid was an independent risk factor "P value = .04".

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Serum mucosa-associated epithelial chemokine in atopic dermatitis : A specific marker for severity

Indian Journal of Dermatology, 2009

Background Mucosa-associated epithelial chemokine (MEC; CCL28) is considered to be pivotal in med... more Background Mucosa-associated epithelial chemokine (MEC; CCL28) is considered to be pivotal in mediating the migration of CC chemokine receptor 3-and 10-(CCR3-and CCR10)-expressing, skin-homing, memory, cutaneous lymphocyte-associated antigen-positive (CLA +) T cells. CCL28 is selectively and continuously expressed by epidermal keratinocytes, but highly upregulated in inflammatory skin diseases, such as atopic dermatitis (AD). Aim This controlled longitudinal study was designed to evaluate the expression of CCL28 in serum in childhood AD and bronchial asthma (BA), and its possible relationship to disease severity and activity. Methods Serum CCL28 levels were measured in 36 children with AD, 23 with BA, 14 with both conditions, and 21 healthy age-and sex-matched controls. Sixteen patients in the AD group were followed up and resampled for serum CCL28 after clinical remission. Serum CCL28 levels were correlated with some AD disease activity and severity variables. Results Serum CCL28 levels in AD, whether during flare [median, 1530 pg/mL; mean ± standard deviation (SD) ¼ 1590.4 ± 724.3 pg/mL] or quiescence (median, 1477 pg/mL; mean ± SD ¼ 1575.2 ± 522.1 pg/mL), were significantly higher than those in healthy children (median, 301 pg/mL; mean ± SD ¼ 189.6 ± 92.8 pg/mL); however, the levels during flare and quiescence were statistically comparable. The serum levels in BA (median, 340 pg/mL; mean ± SD ¼ 201.6 ± 109.5 pg/mL) were significantly lower than those in the AD group, and comparable with those in healthy controls. Serum CCL28 levels in severe AD were significantly higher than those in mild and moderate cases, and correlated positively with the calculated severity scores [Leicester Sign Score (LSS) and Scoring Atopic Dermatitis (SCORAD)]. CCL28 levels during the exacerbation of AD were positively correlated with the corresponding values during remission, the peripheral absolute eosinophil counts, and serum lactate dehydrogenase levels. Serum CCL28 levels were not correlated with the serum total immunoglobulin E values in AD. Conclusions Our data reinforce the concept that CCL28 might contribute to the pathogenesis of AD, probably through the selective migration and infiltration of effector/memory T-helper-2 cells in the skin. CCL28 may also represent an objective prognostic marker for disease severity. Further studies may pave the way for CCL28 antagonism among adjuvant therapeutic strategies.

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Characterization of Monoclonal Antibodies against N-(.GAMMA.-Maleimidobutyryloxy) Succinimide (GMBS)-Conjugated Polyamine, Spermine: Application to Immunocytochemistry

Acta Histochemica et Cytochemica, 1994

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Fuzzy Logic Based Induction Motor Condition Monitoring

The International Conference on Electrical Engineering, 2014

This paper introduces a new technique for condition monitoring of motor control centres, to defin... more This paper introduces a new technique for condition monitoring of motor control centres, to define the motor status and reduce the failure rate of AC motors. Motor stresses defined , and categorized into loading stresses and supply stresses and then two factors are introduced to assess the motor condition, loading stress factor and supply stress factor, using these two factors a reliable motor index is introduced, which defines well the motor status and helps the plant operator to develop an effective predictive and preventative maintenance program. An intelligent fuzzy logic motors condition monitoring system is developed , MATLAB/Simulink model is built to simulate the proposed system.

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Plasma macrophage-derived chemokine (CCL22) and its receptor CCR4 on peripheral blood T lymphocytes of asthmatic children

Background: The macrophage-derived chemokine (MDC/CCL22) acts on CC chemokine receptor-4 (CCR4) t... more Background: The macrophage-derived chemokine (MDC/CCL22) acts on CC chemokine receptor-4 (CCR4) to direct trafficking and recruitment of T helper-2 (TH2) cells into sites of allergic inflammation. It was previously found overexpressed in lesional samples from adult asthmatics. Objective: This study is aimed to investigate the participation of CCR4/MDC axis in the development of TH2-dominated allergen-induced childhood asthma in relation to disease activity, attack severity, and response to therapy, and to outline its value in differentiating atopic asthma from infection-associated airway reactivity. Methods: Proportion of CCR4-expressing peripheral blood T lymphocytes (CCR4+PBTL%) were purified and quantitated by negative selection from peripheral blood mononuclear cells by flow cytometry, and the concentration of MDC in plasma was measured by ELISA in 32 children with atopic asthma (during exacerbation and remission), as well as in 12 children with acute lower respiratory tract inf...

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Large microstrip array antenna with hybrid feed network of standing and traveling waves

2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015

A novel design for large microstrip array antennas is presented. The design is based on combinati... more A novel design for large microstrip array antennas is presented. The design is based on combination of standing-wave and traveling-wave antennas. A standing-wave antenna provides a compact structure because it does not require quarter-wavelength transformers. However just with a standing-wave design, the array size has to remain relatively small. Thus the concept for traveling-wave antennas needs to be incorporated to produce a substantially large array antenna. As an example, an array of 512 elements was fabricated for the US DBS application and characterized. The operation frequency was set at about 12.5 GHz. A gain of 30 dBi was measured, which corresponds to an aperture efficiency of 50%.

Protecting Doubly Fed Induction Generator's Converter Using A Filter Based TCR

2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2020

This paper presents a novel technique for protecting the doubly fed induction generator's con... more This paper presents a novel technique for protecting the doubly fed induction generator's converter specially the Rotor Side Converter (RSC). The proposed technique is based on a filter based Thyristor controlled reactor (TCR) to suppress the rotor current component which generated from the stator natural flux which is built up during voltage dips. The proposed technique is working at the fault time only and irrespective to the rotor speed, which support the capability of the Doubly Fed Induction Generator (DFIG) to withstand faults and/or voltage dips. The proposed technique is simulated using EMTDC/PSCAD.

Numerical Modeling of the Effects of Pore Characteristics on the Electric Breakdown of Rock for Plasma Pulse Geo Drilling

Energies, 2021

Drilling costs can be 80% of geothermal project investment, so decreasing these deep drilling cos... more Drilling costs can be 80% of geothermal project investment, so decreasing these deep drilling costs substantially reduces overall project costs, contributing to less expensive geothermal electricity or heat generation. Plasma Pulse Geo Drilling (PPGD) is a contactless drilling technique that uses high-voltage pulses to fracture the rock without mechanical abrasion, which may reduce drilling costs by up to 90% of conventional mechanical rotary drilling costs. However, further development of PPGD requires a better understanding of the underlying fundamental physics, specifically the dielectric breakdown of rocks with pore fluids subjected to high-voltage pulses. This paper presents a numerical model to investigate the effects of the pore characteristics (i.e., pore fluid, shape, size, and pressure) on the occurrence of the local electric breakdown (i.e., plasma formation in the pore fluid) inside the granite pores and thus on PPGD efficiency. Investigated are: (i) two pore fluids, con...

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Investigating the Relationship between Organizational Justice and Organizational Excellence in Egyptian Travel Agents

International Journal of Tourism and Hospitality Management, 2020

Organizational justice represents people's perceptions about the extent of fair treatment within ... more Organizational justice represents people's perceptions about the extent of fair treatment within organizations. It consists of four dimensions; distributive, procedural, informational and interpersonal justice. On the other hand, organizational excellence could be illustrated as the impressive management which leads to the best results. It includes seven dimensions; mission statement, leadership, strategy, knowledge management, products, human resources management and customer relationship management. This study attempts to define the relationship between organizational justice and organizational excellence in Egyptian travel agents. This study applied descriptive methodology which used a cross-sectional design. Questionnaire was implemented to the gather the primary data from the sample of study from 1 th August till 20 th September 2020. The study included 329 tourism companies who participated with 400 employees, after revising questionnaires; only 358 questionnaires were valid for statistical analysis. The main result is that organizational justice has a predictive ability of organizational excellence in Egyptian travel agents.

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A Novel Tunable Phase Shifter with Distributed Capacitive Loading

2021 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), 2021

A novel but simple design of transmission line with a parasitic patch that works as a phase shift... more A novel but simple design of transmission line with a parasitic patch that works as a phase shifter at the frequency range of 1.5 - 3 GHz is presented. Variable capacitors attached to a parasitic element above the transmission line change the phase of the propagating wave with minimum reflection. A 90 degree of phase shift is achieved with capacitance of 4.5 pF variation.

Enhancing Road – Vehicle Behavior by Implementing Active - Controlled Driver Seat Combined with Semi-Active Ground Hook Suspension System

Entrepreneurial Universities

30th Annual Conference of the International Association for Management of Technology (IAMOT 2021), 2021

Smart Marketing Usage in Egyptian Domestic Tourism: Opportunities and Challenges

Minia Journal of Tourism and Hospitality Research MJTHR, 2021

Challenges Domestic Tourism Egypt Opportunities Smart Marketing Smart marketing has a large numbe... more Challenges Domestic Tourism Egypt Opportunities Smart Marketing Smart marketing has a large number of methods such as websites, search engines, social media sites, mobile apps, videos, etc. which play a vital role in enhancing the relationship between travel agency and tourists. Therefore, this study aims to identify the Smart Marketing Methods and explore the opportunities and challenges of using smart marketing methods in domestic tourism in Egypt. Accordingly, it adapted the descriptive methodology and used a mixed approach in collecting quantitative and qualitative. The quantitative approach is used by employing questionnaire to gather the primary data from domestic tourists in Egypt. The qualitative method is represented in semi-structured interviews with Top Ten Travel Agencies representatives in Egypt. The main results of study demonstrated that there are many advantages of using smart marketing methods in domestic tourism in Egypt; however, there are some obstacles that have clear impacts upon them. The study recommends that Travel Agencies and Tourism Associations in Egypt should apply formal platform to promote domestic tourism and improve their marketing strategy to take advantages of using Smart marketing methods in tourism.

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Anaphylaxis in Children: Experience of an Egyptian Center

Introduction: Anaphylaxis is a potentially life threatening allergic reaction that is rapid in on... more Introduction: Anaphylaxis is a potentially life threatening allergic reaction that is rapid in onset and multisystemic in nature. Distribution of anaphylaxis tends to fluctuate based on age, gender, race, geographical residence and socioeconomic status of the involved subjects. Diagnosis of anaphylaxis in children is generally underestimated particularly in developing countries, and when diagnosed, proper management is occasionally lacking. Aim of the study: to evaluate the frequency and pattern of anaphylaxis and mistakes in diagnosis and treatment among a group of Egyptian children and adolescents. Subjects and methods: This observational study was conducted over 6 months duration, from 1st of September 2019 to the end of February 2020, in Children’s hospital, Ain Shams University, Cairo, Egypt, on children presenting to emergency department (ED). Anaphylaxis frequency, presentation, triggers, diagnosis, management and long term follow up were assessed. Results: frequency rate of ...

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Efficacy of Extracorporeal Shockwave Therapy on Cervical Myofascial Pain Following Neck Dissection Surgery: A Randomized Controlled Trial

Annals of Rehabilitation Medicine, 2020

Objective To investigate the efficacy of extracorporeal shockwave therapy (ESWT) on cervical myof... more Objective To investigate the efficacy of extracorporeal shockwave therapy (ESWT) on cervical myofascial pain following neck dissection in reducing pain and improving cervical range of motion (ROM).Methods Forty-six patients with cervical myofascial pain following neck dissection surgery were recruited and subdivided at random into two equal groups. The ESWT group received ESWT once a week for 4 weeks (0.25 mL/mm2, 1,000 shocks) and a topical non-steroidal anti-inflammatory drug (3 times/day for 4 weeks). The control group received only topical NSAID. The pain assessment was done by using the visual analog scale (VAS) and pressure algometry. A cervical ROM device was used for the assessment of the lateral flexion and rotation of the neck ROM on both sides. All measurements were collected at baseline, 2 weeks, and 4 weeks.Results The ESWT group revealed a significant improvement in all parameters at post I and post II than did the control group (p>0.001), that revealed a statistica...

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Evaluation of serum alkaline phosphatase as a marker of metastasis in early breast cancer

Revista de Senología y Patología Mamaria, 2020

Abstract Introduction Breast cancer is a common worldwide healthcare problem. Identifying metasta... more Abstract Introduction Breast cancer is a common worldwide healthcare problem. Identifying metastatic lesions is crucial for adequate staging. However, there is no standardized metastatic work-up in early-stage breast cancer patients. Materials and methods We retrospectively analyzed data from patients treated in a tertiary hospital for clinical early-stage breast cancer, to assess the value of alkaline phosphatase (ALP) as a predictor of metastasis and as a prognostic factor . Results We detected a significant correlation between ALP and metastasis at diagnosis, and found that ALP is both a sensitive and specific marker in screening for metastasis in early-stage breast cancer. Conclusion ALP is a useful marker of metastasis at diagnosis. Further prospective studies are needed to delineate the incidence and impact of missed metastatic patients if metastatic work-up is omitted.

A new mixed discontinuous Galerkin method for the electrostatic field

Advances in Difference Equations, 2019

We introduce and analyze a new mixed discontinuous Galerkin method for approximation of an electr... more

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Correlation between Serum Uric Acid Level and Left Ventricular Ejection Fraction in Patients with Congestive Heart Failure

World Journal of Cardiovascular Diseases

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International journal of health sciences

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Cardio-Protective Effects of Oral Nicorandil in Patients Undergoing Cardiac Valve Surgery

World Journal of Cardiovascular Diseases, 2019

Download

Correlation between Serum Uric Acid level and Left Ventricular Ejection Fraction in Patients with Congestive Heart Failure

Sohag Medical Journal, 2018

Download

Serum mucosa-associated epithelial chemokine in atopic dermatitis : A specific marker for severity

Indian Journal of Dermatology, 2009

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Characterization of Monoclonal Antibodies against N-(.GAMMA.-Maleimidobutyryloxy) Succinimide (GMBS)-Conjugated Polyamine, Spermine: Application to Immunocytochemistry

Acta Histochemica et Cytochemica, 1994

Download

Fuzzy Logic Based Induction Motor Condition Monitoring

The International Conference on Electrical Engineering, 2014

Download

Plasma macrophage-derived chemokine (CCL22) and its receptor CCR4 on peripheral blood T lymphocytes of asthmatic children

Download

Large microstrip array antenna with hybrid feed network of standing and traveling waves

2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2015

Protecting Doubly Fed Induction Generator's Converter Using A Filter Based TCR

2020 IEEE International Conference on Environment and Electrical Engineering and 2020 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe), 2020

Numerical Modeling of the Effects of Pore Characteristics on the Electric Breakdown of Rock for Plasma Pulse Geo Drilling

Energies, 2021

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Investigating the Relationship between Organizational Justice and Organizational Excellence in Egyptian Travel Agents

International Journal of Tourism and Hospitality Management, 2020

Download

A Novel Tunable Phase Shifter with Distributed Capacitive Loading

2021 IEEE Texas Symposium on Wireless and Microwave Circuits and Systems (WMCS), 2021

Enhancing Road – Vehicle Behavior by Implementing Active - Controlled Driver Seat Combined with Semi-Active Ground Hook Suspension System

Entrepreneurial Universities

30th Annual Conference of the International Association for Management of Technology (IAMOT 2021), 2021

Smart Marketing Usage in Egyptian Domestic Tourism: Opportunities and Challenges

Minia Journal of Tourism and Hospitality Research MJTHR, 2021

Download

Anaphylaxis in Children: Experience of an Egyptian Center

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Efficacy of Extracorporeal Shockwave Therapy on Cervical Myofascial Pain Following Neck Dissection Surgery: A Randomized Controlled Trial

Annals of Rehabilitation Medicine, 2020

Download

Evaluation of serum alkaline phosphatase as a marker of metastasis in early breast cancer

Revista de Senología y Patología Mamaria, 2020

A new mixed discontinuous Galerkin method for the electrostatic field

Advances in Difference Equations, 2019

We introduce and analyze a new mixed discontinuous Galerkin method for approximation of an electr... more

Download

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