Publications by authors named "Hamdi A"

In processes such as electrodialysis, the applied electrical potential is constrained by concentration polarization at the membrane/solution interface. This polarization, which intensifies at higher current densities, impedes ion transport efficiency and may lead to problems such as salt precipitation, membrane degradation, and increased energy consumption. Therefore, understanding concentration polarization is essential for enhancing membrane performance, improving efficiency, and reducing operational costs.

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  • This study examines the effects of oral isotretinoin on eye health in patients with acne vulgaris, highlighting issues like dryness and discomfort.
  • A survey of 489 participants showed a high prevalence of ocular symptoms linked to isotretinoin use, with notable findings including a majority experiencing soreness and blurred vision.
  • Key risk factors for worsening eye symptoms included contact lens use and higher isotretinoin dosages, suggesting the need for careful monitoring and preventive measures for patients at risk.
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Immunosuppression in kidney transplantation elevates the risk of malignancies, particularly immune-driven and virus-related cancers like Kaposi sarcoma (KS). KS typically manifests as single or multiple skin lesions following kidney transplantation but can also affect other organs. Involvement of the kidney allograft by KS is exceptionally rare, with only a few cases documented.

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Background: In response to the urgent need for continuous discovery of new anti-proliferative agents, a new series of quinazoline compounds was prepared.

Methods: As a reference, four cancer cell lines-HCT116, HePG2, Hela, and MCF-7-and sorafenib (SOR) were used to assess the novel motifs' in vitro anticancer efficacy. The most cytotoxic compounds were tested in a VEGFR-2 suppressive test and flow cytometric test.

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We designed and synthesized new quinazolinone-tethered phenyl thiourea/thiadiazole derivatives 4-26. Based on their structural characteristics, these compounds were proposed to have a multi-target mode of action for their anticancer activities. Using the MTT assay method, antiproliferative effects were assessed against three human cancer cell lines (HEPG-2, MCF-7, and HCT-116).

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Augmented reality (AR) is increasingly being explored as a tool to enhance surgical skills training in medical education. This systematic review evaluates the effectiveness of AR in improving surgical skills among medical students. A comprehensive literature search identified studies on AR in surgical training, and data were extracted on sample size, type and dose of intervention, AR technology, application context, parameters, diagnoses, outcomes, and main results.

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Introduction And Importance: At the age of 20, young adults are most susceptible to synovial chondromatosis, a rare condition characterized by the metaplasia of the synovial membrane into cartilaginous or osteocartilaginous tissue. Synovial chondromatosis is exceptionally uncommon in the ankle.

Case Presentation: An orthopedist evaluated a 26-year-old man with a history of recurring ankle trauma over a period of 6 months, swelling and pain.

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Background: Upper respiratory tract infections are a prevalent cause of morbidity in children, often managed in primary care settings. These infections are predominantly viral, but antibiotics are sometimes inappropriately prescribed. This misuse, driven by parental pressure and misconceptions, contributes to the growing problem of antibiotic resistance.

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  • The study aimed to explore how the position of the anterior arm of surgical mesh affects the success of laparoscopic sacrocolpopexy in treating apical prolapse in women.
  • It analyzed data from 63 women who underwent the procedure, measuring the distance from the bladder neck to the mesh and evaluating surgical outcomes at various intervals post-surgery.
  • Findings revealed that a shorter bladder neck-mesh distance correlated with improved apical prolapse repair and patient satisfaction (PGI-I scores) but was associated with a higher risk of post-operative stress urinary incontinence (SUI).
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  • The Letter reports the most accurate measurement so far of the matter-antimatter imbalance during Pb-Pb collisions at a high energy level of 5.02 TeV.
  • It utilizes the Statistical Hadronization framework to determine precise values for the electric charge and baryon chemical potentials, μ_{Q} and μ_{B}.
  • The analysis of antiparticle-to-particle yield ratios shows that the collisions create a system that is generally baryon-free and electrically neutral at midrapidity.
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  • Cutaneous leishmaniasis is a global public health issue, and this study focuses on its effect on patients' quality of life in the Draa-Tafilalet region of Morocco.
  • Researchers gathered data from 87 patients using the Skindex-16 questionnaire, finding that 73.6% reported a moderate impact on their quality of life, with more females affected than males.
  • The presence of facial lesions significantly worsened quality of life, particularly in emotional and functioning aspects, indicating a need for specific management strategies and further research to understand these effects better.
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Pain is a prevalent complaint in emergency departments (EDs) worldwide. Traditional pharmacological methods for pain relief, such as opioids and non-steroidal anti-inflammatory drugs (NSAIDs), have notable side effects and risks. Transcutaneous electrical nerve stimulation (TENS) is a non-pharmacological alternative that has shown promise in various clinical settings.

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Background: Implantation of intraocular lens in the capsular bag has become the standard of care in aphakic state. However, in the absence of capsular support, several techniques and intraocular lenses are available. Our study aims to report the safety, efficacy, and clinical outcomes of transconjunctival intrascleral intraocular lens fixation with Yamane's double-needle technique and flanged haptics.

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Dual targeting by a single molecule has emerged as a promising strategy for fighting cancer. In this study, a new set of 2-thioquinazolin-4(3)-ones as potential anti-cancer surrogates endowed with dual EGFR/VEGFR-2 kinases inhibitory activities were synthesized. The anti-tumor potency of the newly synthesized candidates 4-27 was evaluated against a panel of four cancer cell lines.

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This research introduces a novel MOMENTS-SVD vector for fingerprint identification, combining invariant moments and SVD (Singular Value Decomposition), enhanced by a modified PCA (Principal Component Analysis). Our method extracts unique fingerprint features using SVD and invariant moments, followed by classification with Euclidean distance and neural networks. The MOMENTS-SVD vector reduces computational complexity by outperforming current models.

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Maintaining consistent and accurate temperature is critical for the safe and effective storage of vaccines. Traditional monitoring methods often lack real-time capabilities and may not be sensitive enough to detect subtle anomalies. This paper presents a novel deep learning-based system for real-time temperature fault detection in refrigeration systems used for vaccine storage.

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Background: Alzheimer's disease (AD) is the most prevalent neurodegenerative disorder, with a significant burden on global health. AD is characterized by a progressive cognitive decline and memory loss. Emerging research suggests a potential link between periodontitis, specifically the presence of oral bacteria such as (), and AD progression.

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The ALICE Collaboration reports the measurement of semi-inclusive distributions of charged-particle jets recoiling from a high transverse momentum (high p_{T}) hadron trigger in proton-proton and central Pb-Pb collisions at sqrt[s_{NN}]=5.02  TeV. A data-driven statistical method is used to mitigate the large uncorrelated background in central Pb-Pb collisions.

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Cancer remains a leading cause of death worldwide, often resulting from uncontrolled growth in various organs. Protein kinase inhibitors represent an important class of targeted cancer therapies. Recently, the kinases BRAF and VEGFR-2 have shown synergistic effects on tumor progression.

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K^{+}K^{-} pairs may be produced in photonuclear collisions, either from the decays of photoproduced ϕ(1020) mesons or directly as nonresonant K^{+}K^{-} pairs. Measurements of K^{+}K^{-} photoproduction probe the couplings between the ϕ(1020) and charged kaons with photons and nuclear targets. The kaon-proton scattering occurs at energies far above those available elsewhere.

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The imidazole nucleus represents a significant group of heterocyclic molecules with diverse significance in the modern world due to its exploration potential and various pharmacological applications. The relevance of imidazole and its derivatives has gained popularity in recent years, especially in the production of commercial drugs and the treatment of various conditions. The imidazole nucleus is present in many natural compounds and widely distributed in essential amino acids, such as l-histidine, whose derivatives exhibit powerful pharmacological properties.

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In our study, a series of quinazoline-1,2,3-triazole hybrids (14a-r) have been designed and synthesized as multi-target EGFR, VEGFR-2, and Topo II inhibitors. All synthesized hybrids were assessed for their anticancer capacity. MTT assay revealed that compounds 14a, 14d, and 14k were the most potent hybrids against four cancer cell lines, HeLa, HePG-2, MCF-7, and HCT-116 at low micromolar range while exhibiting good selectivity against normal cell line WI-38.

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Cisplatin is a potent compound in anti-tumor chemotherapy; however, its clinical utility is hampered by dose-limiting nephrotoxicity. This study investigated whether papaverine could mitigate cisplatin-induced kidney damage while preserving its chemotherapeutic efficacy. Integrative bioinformatics analysis predicted papaverine modulation of the mechanistic pathways related to cisplatin renal toxicity; notably, mitogen-activated protein kinase 1 (MAPK1) signaling.

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  • - This Letter discusses the measurement of ridge yields from charged hadron angular correlations in proton-proton collisions at a high energy of 13 TeV, specifically within certain pseudorapidity and transverse momentum ranges.
  • - The research extends ridge yield measurements to low charged-particle multiplicity regions, where typically a strong interacting medium is not expected to form during collisions.
  • - Findings indicate that ridge yields in pp collisions are significantly higher than those observed in e^{+}e^{-} collisions, suggesting that processes in e^{+}e^{-} annihilations do not significantly influence long-range correlations in proton-proton interactions.
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  • The ALICE detector measured the cross section for incoherent photonuclear production of J/ψ vector mesons, focusing on the Mandelstam |t| variable, during ultraperipheral collisions of Pb nuclei at a very high energy of 5.02 TeV.
  • The measurement was conducted within a rapidity interval of |y|<0.8 and covers a specific range of Bjorken-x values.
  • Analysis showed that models without quantum fluctuations in the gluon density predicted a much steeper |t|-dependence than observed, but including these fluctuations improved the models' alignment with the data.
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