Publications by authors named "Ragab A"

This study explores the optimization and performance of a hybrid energy system combining a geothermal heat pump (GHP) with a wind turbine in Izmir, Turkey. Utilizing a 4E (Energy, Exergy, Economic, and Exergoenvironmental) analysis approach, the system aims to enhance winter heating efficiency. Geothermal heat pumps leverage the Earth's consistent temperatures for heating and cooling, offering a sustainable alternative to traditional energy sources.

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  • Infraorbital ethmoidal air cells (IOEAc) are a type of ethmoidal cells located beneath the orbit, showing significant anatomical variation in humans.
  • A study involving 1260 CT scans aimed to identify and classify these variations, noting the presence of IOEAc in 173 cases (13.7%).
  • The new classification system categorized the air cells into five main types with various subtypes, enhancing understanding for clinical practice and future research.
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Hepatocellular carcinoma (HCC) ranks as the third most prevalent reason for cancer-related death on a global scale. Tyrosine kinase inhibitors (TKIs) continue to be the primary treatment option for advanced hepatocellular carcinoma. A series of fluoro-11H-indeno[1,2-b]quinoxaline derivatives as an HCC drug targeting the VEGFR2/AKT axis was designed and synthesized.

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This study introduces a novel and environmentally friendly method for developing a cross-linked chitosan-Ocimum basilicum leaves-ZnO (ChOBLZnO) composite membrane, specifically designed for the adsorption of permanganate ions (MnO-) from wastewater. Various characterization techniques, including Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) surface area analysis, were employed to confirm the membrane's synthesis quality, structural integrity, and surface properties crucial for adsorption. The BET analysis revealed a surface area of 228.

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  • Asphalt is widely used for its strong adhesion and affordability, but it lacks effective corrosion protection, requiring improvements through additives.
  • In this study, a poly(amidoamine)-zinc oxide (PAMAM-ZnO) nanocomposite was blended into asphalt, with a 2% ratio showing an exceptional corrosion protection efficiency of nearly 98% and a significant increase in charge transport resistance.
  • The corrosion protection mechanism relies on a protective barrier formed by PAMAM-ZnO and the sacrificial action of ZnO, which interacts preferentially with corrosive agents, thus enhancing the effectiveness and durability of the asphalt coating.
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Background: Sperm DNA fragmentation (SDF) can significantly impact male fertility, especially in cases where there is a substantial level of DNA damage. We aimed in the current study to assess seminal plasma (SP) levels of vaspin and visfatin in infertile men with an elevated SDF index (SDFI ≥ 30%) compared to infertile males with a normal SDFI (SDFI < 30%).

Results: Groups with good and medium DNA integrity exhibited significantly higher total motile sperm count and sperm motility in comparison to the group with poor DNA integrity.

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  • Previous research suggests a link between Helicobacter pylori infection and pancreatic diseases, prompting this study to investigate the effects of pomegranate exocarp extract (PEE) on pancreatic tissue in H. pylori-infected rats.
  • The study involved 48 Wistar rats divided into six groups to evaluate the impact of PEE and metronidazole on H. pylori infection and related pancreatic changes, revealing significant reductions in H. pylori concentration, especially in combined treatment groups.
  • Additionally, PEE treatment increased levels of E-cadherin (a marker for reduced cancer risk) while decreasing vimentin, indicating a positive influence on epithelial-mesenchymal transition, which was validated by various analyses including ELISA and RT
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Background: Enhancing prognostication in Hepatocellular Carcinoma (HCC) remains an unmet need, especially in patients with preserved liver function. This study aimed to integrate the Platelet-to-White Blood Cell Ratio (PWR) with albumin-bilirubin (ALBI) and platelets-albumin-bilirubin (PALBI) scores for improved assessment of mortality and treatment responses in hepatocellular carcinoma (HCC) patients.

Methods: In this prospective study, 262 patients with hepatocellular carcinoma (HCC) were included, with basic data collected and followed up for one year or until death.

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Diabetic retinopathy is a serious eye disease that may lead to loss of vision if it is not treated. Early detection is crucial in preventing further vision impairment and enabling timely interventions. Despite notable advancements in AI-based methods for detecting diabetic retinopathy, researchers are still striving to enhance the efficiency of these techniques.

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Background: Irisin is an exercise-induced myokine that alleviates endothelial dysfunction and reduces insulin resistance in type 2 diabetes mellitus (T2DM). The current study aimed to assess the serum level of irisin in T2DM men with erectile dysfunction (ED) compared to T2DM patients with normal erectile function and healthy controls, as well as investigate the association between serum irisin level and the severity of ED in T2DM patients.

Patients And Methods: A cross-sectional study was conducted on 90 males, divided into three groups: 32 T2DM patients with ED, 24 T2DM patients without ED, and 34 healthy controls.

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Introduction: Brain magnetic resonance imaging (MRI) and inflammatory biomarkers are crucial for investigating preclinical neurocognitive disorders. Current investigations focus on a few inflammatory markers. The study aims to investigate the associations between inflammatory biomarkers and MRI measures and to examine sex differences among the associations in the Framingham Heart Study.

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Purpose: We aimed to perform a meta-analysis with the intention of evaluating the reliability and test accuracy of the aMAP risk score in the identification of HCC.

Methods: A systematic search was performed in PubMed, Scopus, Cochrane, Embase, and Web of Science databases from inception to September 2023, to identify studies measuring the aMAP score in patients for the purpose of predicting the occurrence or recurrence of HCC. The meta-analysis was performed using the meta package in R version 4.

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Background: The purpose of the current study was to compare the testosteroneestradiol (T:E2) ratio in Toxoplasma gondii seropositive infertile men with seropositive and seronegative normozoospermic controls.

Methods: Totally, 200 men with normal virilization, 100 with idiopathic infertility and 100 normozoospermic men, were included. Participants underwent medical history assessment, physical examination, semen analysis, testing for T.

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Chitosan is used in many applications due to its biodegradability, biocompatibility, nontoxicity, nonadhesiveness, and film-forming capabilities. Chitosan has antibacterial and antifungal activities, which are two of its other desirable attributes. However, chitosan can only dissolve in acidic liquids (1-3 % acetic acid), limiting its practical application.

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Diabetes mellitus type 2 (T2DM) can be managed by targeting dipeptidyl peptidase-4 (DPP-4), an enzyme that breaks down and deactivates peptides such as GIP and GLP-1. In this context, a new series of 2-(2-substituted hydrazineyl)thiazole derivatives 4, 5, 6, 8, 10, and 11 conjugated with the 2-hydroxy-5-(pyrrolidin-1-ylsulfonyl)benzylidene fragment were designed and synthesized. The virtual screening of the designed derivatives inside DPP-4 demonstrated good to moderate activity, with binding affinity ranging from -6.

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Transportation relies heavily on petroleum products, forcing the adoption of alternative energy sources like hydrogen. Hydrogen is considered the cleanest fuel for the twenty-first century due to its water-based combustion and no CO emissions. However, challenges persist in production, utilization, and storage; employing composite material-based high-pressure storage vessels is increasing in the hydrogen storage sector.

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Background: Vasodilatation and bacterial dislocation are the main contributors to the catastrophic events in patients with decompensated liver cirrhosis (DLC).

Aim: The aim of this study was to evaluate the impacts of adding midodrine and rifaximin on morbidity, mortality, and quality of life in patients with DLC.

Methods: This interventional clinical study included 100 consecutively enrolled DLC patients randomized 1 : 1 into two groups.

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This study explores the effectiveness of Alginate-coated nano‑iron oxide combined with copper-based MOFs (Cu-BTC@Alg/FeO) composites for the sustainable and efficient removal of Rhodamine B (RhB) dye from wastewater through adsorption and photocatalysis. Utilizing various characterization techniques such as FTIR, XRD, SEM, and TEM, we confirmed the optimal synthesis of this composite. The composites exhibit a significant surface area of approximately 160 m g, as revealed by BET analysis, resulting in an impressive adsorption capacity of 200 mg g and a removal efficiency of 97 %.

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This study focuses on the development of a novel self-cleaning nanofiltration membrane for the efficient removal of the cationic dye methylene blue (MB) from industrial wastewater. The membrane is composed of vinyl resin (VR), cellulose nanofibrils (CNF), and titanium alpha aluminate (TAAL) nanoparticles.The TAAL loading ranged from 1 to 5 wt%, the pH varied from 5 to 10, and the initial MB concentration ranged from 10 to 50 ppm.

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Inhibition of α-glucosidase and -amylase are key tactics for managing blood glucose levels. Currently, stronger, and more accessible inhibitors are needed to treat diabetes. Indeno[1,2-] quinoxalines-carrying thiazole hybrids were created and described using NMR.

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In this study, a new series of thiazolo[4,5-b]quinoxaline derivatives 3-8 were synthesized by treating 2,3-dichloroquinoxaline with thiosemicarbazone and thiourea derivatives under reflux conditions. The chemical structure of the newly designed derivatives was conducted using spectroscopic techniques. The insecticidal bioassay of the designed derivatives was evaluated against the 2nd and 4th larvae of S.

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Uncontrolled diabetes can lead to hyperglycemia, which causes neuropathy, heart attacks, retinopathy, and nervous system damage over time, therefore, controlling hyperglycemia using potential drug target inhibitors is a promising strategy. This work focused on synthesizing new derivatives via the diazo group, using a hybridization strategy involving two approved drugs, paracetamol and several sulfonamides. The newly designed diazo-paracetamols 5-12 were fully characterized and then screened for in vitro α-amylase and α-glucosidase activities and exhibited inhibitory percentages (IP) = 92.

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Purpose: The study aimed to evaluate safety of omitting the intraabdominal drains after perforated peptic ulcer repairs.

Materials And Methods: We conducted a prospective, randomized, controlled trial from January 2022 to January 2024 at the Emergency surgery department. Patients with perforated peptic ulcers were evaluated for eligibility.

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Background: Global life expectancy is rising, with the 60 + age group projected to hit 2 billion by 2050. Aging impacts the immune system. A notable marker of immune system aging is the presence of Aging-Related Immune Cell Phenotypes (ARIPs).

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