Export 3014 results:
Sort by: Author Title Type [ Year  (Desc)]
In Press
Selmy, M. I., H. Mostafa, and A. A. S. Dessouki, "Hardware Implementation of a Low Power MemristorBased Voltage Controlled Oscillator", IEEE International Conference on Microelectronics (ICM 2019), Cairo, Egypt, In Press.
Medany, S. S., M. A. Hefnawy, and S. M. Kamal, High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications, , vol. 14, issue 1, pp. 471, 2024. AbstractWebsite

One of the most effective electrocatalysts for electrochemical oxidation reactions is NiMn2O4 spinel oxide. Here, a 3-D porous substrate with good conductivity called carbon felt (CF) is utilized. The composite of NiMn2O4-supported carbon felt was prepared using the facile hydrothermal method. The prepared electrode was characterized by various surface and bulk analyses like powder X-ray diffraction, X-ray photon spectroscopy (XPS), Scanning and transmitted electron microscopy, thermal analysis (DTA), energy dispersive X-ray (EDX), and Brunauer–Emmett–Teller (BET). The activity of NiMn2O4 toward the electrochemical conversion of ethylene glycol at a wide range of concentrations was investigated. The electrode showed a current density of 24 mA cm−2 at a potential of 0.5 V (vs. Ag/AgCl). Furthermore, the ability of the electrode toward hydrogen evaluation in an alkaline medium was performed. Thus, the electrode achieved a current density equal 10 mA cm−2 at an overpotential of 210 mV (vs. RHE), and the provided Tafel slope was 98 mV dec−1.

Alhaider, M. M., S. H. E. Abdel Aleem, Z. M. Ali, and A. M. Zobaa, "Harmonics management and hosting capacity enhancement: Optimal double-resistor damped double-tuned power filter with artificial hummingbird optimization", PLOS ONE, vol. 19, no. 5: Public Library of Science, pp. 1-25, 05, 2024. AbstractWebsite

This paper introduces a novel and improved double-resistor damped double-tuned passive power filter (DR-DDTF), designed using multi-objective optimization algorithms to mitigate harmonics and increase the hosting capacity of distribution systems with distributed energy resources. Although four different topologies of single-resistor damped double-tuned filters (DDTFs) have been studied before in the literature, the effectiveness of two different DR-DDTF configurations has not been examined. This work redresses this gap by demonstrating that via comprehensive simulations on two power systems, DR-DDTF provides better harmonic suppression and resonance mitigation than single-resistor alternatives. When it comes to optimizing the DR-DDTF for maximum hosting capacity and minimum system active power losses, the multi-objective artificial hummingbird outperformed six other algorithms in the benchmark. To allow for higher penetration of distributed generation without requiring grid upgrades, this newly developed harmonic mitigation filter provides a good alternative.

Mohamed Teleb, M. A., H. M. Hassaneen, I. A. Abdelhamid, and F. M. Saleh, "Hantzsch‐like synthesis of isoquinolino [2, 1‐a] quinoline‐12‐carbonitrile incorporating aryl or heteroaryl moieties at C‐13", Journal of Heterocyclic Chemistry, vol. 61, issue 2: John Wiley & Sons, Inc. Chichester, UK, pp. 336-340, 2024. Abstract
Fettouh, A. I. A., N. A. Ghallab, N. A. Mina, M. S. Abdelmalak, A. A. G. Abdelrahman, A. F. Shalaby, and N. Shemais, "Hard and soft tissue alterations using dual-zone concept versus connective tissue graft at maxillary immediate implant placement: A 1-year randomized clinical and volumetric trial.", Clinical oral implants research, vol. 35, issue 5, pp. 510-525, 2024. Abstractfettouh_mega_trial_coir_2024.pdf

OBJECTIVES: To evaluate the esthetic outcome, as well as clinical, radiographic, and volumetric tissue alterations 1 year after immediate implant placement (IIP) with connective tissue grafting (CTG) versus dual-zone concept (DZ) at sites with thin labial bone in the esthetic zone.

MATERIALS AND METHODS: This randomized clinical trial included 30 patients treated with IIP simultaneous with either CTG or DZ (n = 15 each). Pink esthetic score (PES) was assessed 6 months after crown placement as the primary outcome. Amount of bone labial to the implant, labio-palatal ridge reduction, and crestal bone changes were measured via CBCT after 1 year. Volumetric analysis of linear labial soft tissue contour, interdental, and mid-facial soft tissue level changes, and total volume loss (mm) were measured after 1 year.

RESULTS: Similar PES was observed in the CTG (12.53 ± 1.13) and DZ (12.13 ± 1.55) groups, with no significant difference (p = 0.42). Likewise, there were no statistically significant differences found between the two groups in labio-palatal bone reduction (mm&%), interdental papillae, and mid-facial gingival levels (p > 0.05). However, the mean vertical crestal bone changes in the CTG and DZ groups were -1.1 ± 0.6 mm and 0.2 ± 1.0 mm, respectively, with a statistically significant difference (p = 0.0002). Moreover, CTG revealed less linear and total volume (mm) loss in the labial soft tissue which was statistically significant compared to DZ (p = 0.007).

CONCLUSION: Both groups demonstrated the same PES, nevertheless, volumetric analysis revealed twice total labial volume loss in DZ compared to CTG. It might be concluded that the use of CTG with IIP caused less horizontal reduction in the supra-implant complex compared to the DZ.

Tabaa, M. M. E., M. M. El Tabaa, E. Rashad, M. S. Elballal, and O. Elazazy, "Harmine alleviated STZ-induced rat diabetic nephropathy: A potential role via regulating AMPK/Nrf2 pathway and deactivating ataxia-telangiectasia mutated (ATM) signaling", International Immunopharmacology, vol. 132: Elsevier, pp. 111954, 2024. Abstract
Farghali, H. A., S. Gadallah, T. Misk, I. A. Emam, N. A. A. Elkader, M. S. Khattab, H. O.AbuBakr, A. Elsabaa, and A. Hammad, "Healing Potential of Single Dose of Inactivated Autologous PRP, Laser, and PRP/Laser Combination on Full-Thickness Skin Defect in Dogs", Iran J Vet Surg , 2024.
Farghali, H. A., S. Gadallah, T. Misk, I. A. Emam, N. A. A. Elkader, M. S. Khattab, H. O. AbuBakr, A. Elsabaa, and A. Hammad, "Healing Potential of Single Dose of Inactivated Autologous PRP, Laser, and PRP/Laser Combination on Full-Thickness Skin Defect in Dogs", Iranian Journal of Veterinary Surgery, vol. 19, pp. 19 - 29, 2024.
El-Anwar, N., M. El-Shabrawi, O. O. Shahin, R. Abdel Kareem, A. M. Salama, and sherif Baroudy, "Health-related quality of life and cognitive function in children with Crigler-Najjar syndrome type 1.", Paediatrics and international child health, vol. 44, issue 1, pp. 18-23, 2024. Abstract

BACKGROUND: The aim of the study was to assess the health-related quality of life (HRQOL) and cognitive function in patients with Crigler-Najjar syndrome (CNS) type I and its impact on their lives.

METHODS: Twenty-one patients diagnosed with CNS type I aged 1 month to 18 years in the Paediatric Hepatology Unit of Cairo University Children's Hospital were enrolled in this cross-sectional observational study. The patients' health-related quality of life (HRQOL) was assessed using the World Health Organization Quality Of Life BREF questionnaire (WHOQOL-BREF) and the Short Form 36 Health Survey Questionnaire (SF-36). Cognitive function was assessed using the Stanford-Binet Intelligence Scale: Fifth Edition (SB5).

RESULTS: All patients had a history of admission to a neonatal intensive care unit, 17 were managed by phototherapy only and 5 also underwent exchange transfusion. According to the WHOQOL questionnaire, 11 cases (52.4%) had a low QOL score, and 7 of 13 patients had an average score for their total IQ test. Cases with poor compliance to phototherapy had statistically significantly lower QOL scores (=0.001), while, according to the SF36 survey, cases who received exchange transfusion had statistically significantly higher cognitive function (=0.03). There was a positive correlation between the neurological effect as a complication of the disease and poor physical QOL.

CONCLUSION: Paediatric patients with CNS have significantly lower HRQOL, especially physically, psychologically and environmentally. It is recommended that assessment of HRQOL should be a routine part of follow-up in CNS patients. Patients whose HRQOL is affected receive regular psychiatric counselling, social support and rehabilitation. CNS: Crigler-Najjar syndrome; HRQOL: health-related quality of life; IQ: intelligence quotient; NICU: neonatal intensive care unit; QOL: quality of life; SB5: Stanford-Binet intelligence scale: 5th edition; SF-36: Short Form 36 Health Survey Questionnaire; UDGT: uridine diphosphate glucuronosyl transferase; UGT1A1: uridine 5'-diphosphate glucuronosyltransferase; WHOQOL-BREF: World Health Organization Quality of Life Brief Version.

Ahmed, R. S., M. E. Abuarab, M. A. Baiomy, and M. M. Ibrahim, "Heavy metals removal from industrial wastewater using bio-adsorbent materials based on agricultural solid wastes through batch and continuous flow mechanisms", Journal of Water Process Engineering, vol. 57, 2024.
Mahdy, N. E., R. M. Ibrahim, P. M. Abdel-Baki, S. R. Emam, S. E. Ali, Marwa A Ibrahim, M. S. Khattab, and K. Y. Far, Hepatoprotective mechanisms of chemically characterized Aloe striata gel with and without loading on nanoparticles, involving ERK-JNK signaling pathway, , 2024.
Mahdy, N. E., R. M. Ibrahim, P. M. Abdel-Baki, S. R. Emam, S. E. Ali, Marwa A Ibrahim, M. S. Khattab, K. Y. Farroh, and Shymaa A. El Badawy, "Hepatoprotective mechanisms of chemically characterized Aloe striata gel with and without loading on nanoparticles, involving ERK-JNK signaling pathway", South African Journal of Botany,, vol. 170, pp. 163 - 171, 2024.
Mohamed, O. G., A. A. Shalabi, A. M. El Halawany, A. Tripathi, and E. Abdel-Sattar, "Hexagonosides AF: Pregnane glycosides isolated from Caralluma hexagona", Phytochemistry, vol. 217: Pergamon, pp. 113903, 2024. Abstract
Elaziz, M. M. A., S. M. Gamal, A. Fayed, M. H. Abu-Zaid, S. A. Ghoniem, and D. A. Teleb, "High- and low-dose cyclophosphamide in Egyptian lupus nephritis patients: a multicenter retrospective analysis.", Zeitschrift fur Rheumatologie, vol. 83, issue Suppl 1, pp. 115-123, 2024. Abstract

BACKGROUND: Lupus nephritis (LN) is a common serious presentation of systemic lupus erythematosus. Cyclophosphamide (CYC) and mycophenolate mofetil (MMF) are listed as the first-line drugs in induction therapy for LN.

OBJECTIVE: This study aimed to compare high- and low-dose CYC in a cohort of Egyptian LN patients.

PATIENTS AND METHODS: The data of 547 patients with class III/IV active LN who received CYC as induction therapy were retrospectively analyzed. Whereas 399 patients received 6‑monthly 0.5-1 g/m CYC doses, 148 patients received six biweekly 500 mg CYC doses. Demographic data, laboratory test results, and disease activity index were recorded and compared at presentation and at 6, 12, 18, 24, and 48 months of follow-up.

RESULTS: After 48 months, the proportion of patients maintaining normal creatinine levels was higher in the group receiving induction therapy with high-dose CYC (67.9%, 60.4%, p = 0.029), and these patients also had higher proteinuria remission at 36 (26.6%, 14.8%, p = 0.014) and 48 months (24.3%, 12.8%, p = 0.006). Comparison of patient outcomes according to both induction and maintenance therapy showed the best results in patients who received high-dose CYC and continued MMF as maintenance therapy.

CONCLUSION: High- and low-dose CYC are comparable in early phases of treatment. However, after a longer duration of follow-up, high-dose CYC was associated with higher remission rates in the current cohort.

Medany, S. S., M. A. Hefnawy, and S. M. Kamal, "High-performance spinel NiMn2O4 supported carbon felt for effective electrochemical conversion of ethylene glycol and hydrogen evolution applications", Scientific Reports, vol. 14, issue 1, pp. 471, 2024.
Bastawy, H. A., M. A. Niazy, M. H. Farid, A. Y. Harhash, M. R. Aboelwafa, and A. M. Abu-Sieda, "Histological evaluation of pulp response to Pulpine NE versus Biodentine as direct pulp capping materials in a dog model", International Arab Journal of Dentistry, vol. 15, issue 1, pp. 106-119, 2024. pulpine_histology.pdf
Elkhashab, R. A., A. H. Mahran, M. Badr, and A. M. Abu-Seida, "Histopathology and immunohistochemical reactions of Nano-White MTA versus NeoMTATM Plus® and MTA Angelus® as immediate furcation perforation repair materials in a dog model", Giornale Italiano di Endodonzia, vol. 38, issue 1, pp. 16-27, 2024. nano_mta_biology.pdf
yasser el nahass, N. Mekky, N. M. Abdelfattah, R. Abdel Fattah, M. Samra, O. A. Fahmy, G. Fathy, W. El Metnawy, S. Sabet, H. Bassiouny, et al., "HLA alleles, haplotypes frequencies, and their association with hematological disorders: a report from 1550 families whose patients underwent allogeneic bone marrow transplantation in Egypt.", Immunogenetics, 2024. Abstract

HLA alleles are representative of ethnicities and may play important roles in predisposition to hematological disorders. We analyzed DNA samples for HLA-A, -B, -C, -DRB1, and -DQB1 loci, from 1550 patients and 4450 potential related donors by PCR-SSO (Polymerase chain reaction sequence-specific oligonucleotides) and estimated allele frequencies in donors and patients from 1550 families who underwent bone marrow transplantation (BMT) in Egypt. We also studied the association between HLA allele frequencies and incidence of acute myeloid leukemia, acute lymphoblastic leukemia, and severe aplastic anemia. The most frequently observed HLA class I alleles were HLA- A*01:01 (16.9%), A*02:01 (16.1%), B*41:01 (8.7%), B*49:01 (7.3%), C*06:02 (25.1%), and C*07:01 (25.1%), and the most frequently observed class II alleles were HLA-DRB1*11:01 (11.8%), DRB1*03:01 (11.6%), DQB1*03:01 (27.5%), and DQB1*05:01 (18.9%). The most frequently observed haplotypes were A*33:01~B*14:02 ~ DRB1*01:02 (2.35%) and A*01:01~B*52:01~DRB1*15:01 (2.11%). HLA-DRB1*07:01 was associated with higher AML odds (OR, 1.26; 95% CI, 1.02-1.55; p = 0.030). Only HLA-B38 antigen showed a trend towards increased odds of ALL (OR, 1.52; 95% CI, 1.00-2.30; p = 0.049) HLA-A*02:01, -B*14:02, and -DRB1*15:01 were associated with higher odds of SAA (A*02:01: OR, 1.35; 95% CI, 1.07-1.70; p = 0.010; B*14:02: OR, 1.43; 95% CI, 1.06-1.93; p = 0.020; DRB1*15:01: OR, 1.32; 95% CI, 1.07-1.64; p = 0.011). This study provides estimates of HLA allele and haplotype frequencies and their association with hematological disorders in an Egyptian population.

Hassan, M. A., S. Serra, S. Sochard, H. Viot, F. Marias, and J. - M. Reneaume, "Holistic non-linear optimization of the layout, sizing, and operation of a district heating plant", Energy Conversion and Management, vol. 301: Pergamon, pp. 118079, 2024. Abstract
Ibrahim, M. S., S. M. Gharghory, and H. A. Kamal, "A hybrid model of CNN and LSTM autoencoder-based short-term PV power generation forecasting", Electrical Engineering: Springer Berlin Heidelberg, pp. 1–17, 2024. Abstract
Mostafa Abdel‑Hamied1*, Haidi Mahmoud Hassan1, Y. A. M. 1 M. E. M. I. 1 Y. F. 1 H. M. 1S., "Hybrid nanogels and their roles in eliminating soot stains from historical paper manuscripts", Heritage Science, vol. 12, issue 104, pp. 19, 2024.
Anwar, A. M., A. M. Soliman, and H. G. Radwan, "Hydraulic‑based optimization algorithm for the design of stormwater drainage networks", Applied water science, vol. 14, issue 139, pp. 1-26, 2024.
Kaood, A., A. ElDegwy, and A. Aboulmagd, "Hydrothermal and entropy generation performance of convergent tubes with various dimple shapes", International Journal of Thermal Sciences, vol. 197, pp. 108842, 2024.