Publications by authors named "Dalia Hamdan"

Objective: We aimed to perform a systematic review and meta-analysis of myringoplasty outcomes following platelet concentrates application in patients with chronic otitis media (COM).

Data Sources: We searched MEDLINE, Embase, and Cochrane Central register of Controlled Clinical Trials (CENTRAL). We also performed a manual search in Google Scholar and reference lists.

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balady orange, navel orange, , bloody orange, C. sweet orange, var. and were successfully discriminated using chromatographic and spectroscopic techniques coupled with chemometrics.

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Article Synopsis
  • - The study investigates the chemical profiles of marine red algae and three fungal endosymbionts found within it, focusing on the natural products they produce and their chemical similarities.
  • - Researchers used advanced techniques like ultra-high performance liquid chromatography coupled with mass spectrometry (UHPLC-MS/MS) to analyze extracts from both the algae and the fungi, identifying 76 different metabolites across various chemical classes.
  • - Findings indicate a relationship between the marine algae and the fungi, with some metabolites shared among them and others unique to the endophytes, highlighting distinct biochemical differences revealed through multivariate analysis.
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Introduction: Thyroidectomy technique and extent are related to parathyroid injury and hypoparathyroidism. Total thyroidectomy is one of the most commonly performed endocrine surgeries, and the majority of patients recover completely without any complications. However, persistent hypoparathyroidism is the most prevalent long-term consequence following total thyroidectomy.

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Asthma is a chronic disease affecting people of all ages. Asthma medications are associated with adverse effects restricting their long-term usage, demanding newer alternative therapies. This study aimed to investigate the anti-asthmatic properties of extract and its prepared nano-cubosomal dispersion (Ruta-ND).

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Oral cancer is a severe health problem that accounts for an alarmingly high number of fatalities worldwide. (L.) Dunal has been extensively studied against various tumor cell lines from different body organs, rarely from the oral cavity.

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Background: Discrimination by some healthcare providers toward people living with HIV/AIDS has been documented. Differences in cultural backgrounds make it harder for future doctors, who need a lot of knowledge and a positive attitude to treat patients. In conservative countries like Saudi Arabia, not enough is known about how much medical interns know about HIV and how they feel about people living with HIV/AIDS.

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Introduction The aim of the present study was to describe our institution's nine years of experience in the endoscopic endonasal management of cerebrospinal fluid (CSF) rhinorrhea and to discuss the causes, sites, and outcomes.  Methodology The medical records of patients diagnosed with CSF rhinorrhea in King Abdulaziz Medical City-Jeddah (KAMC-J) between 2014 and 2023 were retrospectively reviewed, and all relevant information including body mass index, medical and surgical history, and postoperative outcomes were obtained. Results A total of 20 cases were included in the present study, sixteen (80%) of which were females and four (20%) were males.

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Purpose: The traditional standard of care for Graves' ophthalmopathy (GO) is glucocorticoid therapy, which is associated with many long-term side effects. The aim of this systematic review and meta-analysis was to compare the traditional therapy to novel monoclonal antibodies (e.g.

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Background: Cancer represents one of the biggest healthcare issues confronting humans and one of the big challenges for scientists in trials to dig into our nature for new remedies or to develop old ones with fewer side effects. Halophytes are widely distributed worldwide in areas of harsh conditions in dunes, and inland deserts, where, to cope with those conditions they synthesize important secondary metabolites highly valued in the medical field. Several Tamarix species are halophytic including T.

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Column chromatography afforded the isolation of seven secondary metabolites (1-(2,4,6-trihydroxy phenyl)-ethanone-4--β-d-glucopyranoside, naringenin-7--β-d-glucopyranoside, kaempferol-3--α-l-rhamnoside, kaempferol-3--β-d-glucopyranoside, quercetin-3--β-d-glucopyranoside, quercetin-3--β-d-galactopyranoside, rutin) from the ethyl acetate (ET) fractions of Miq. stems (S), leaves (L), and fruits (F). Their identification based on ultraviolet (UV), electron ionization (EI), electrospray ionization-mass spectrometry (ESI-MS), and 1D and 2D NMR data.

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Aging has become a concern for many people, especially women. Given that high-quality anti-aging products are of high cost; it has imperative to search for other economical sources. Essential oils are frequently used in cosmetics products due to a wide range of biological activities as well as their pleasant odor.

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This study was conducted to explore the potential cardioprotective and anti-depressive effects of dichloromethane (DCM) fractions of leaves (L) and stem branches (S) on post-myocardial infarction (MI) depression induced by isoprenaline (ISO) in rats in relation to their metabolites. The study was propped with a UPLC-ESI-MS/MS profiling and chromatographic isolation of the secondary metabolites. Column chromatography revealed the isolation of lupeol palmitate (6) that was isolated for the first time from nature with eight known compounds.

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There have been no reports published on the rare growing wildly in Egypt. So, this study aimed to preserve it through method optimization of in vitro seed germination, besides callus formation from induced seedlings. Chemical profiling using gas chromatography-mass spectrometry (GC-MS) analysis of the hexane fraction afforded 29 identified components, mainly fatty acids esters, sesquiterpenes, triterpenes, one thiophene, and bis(2-ethylhexyl) phthalate.

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The Willows (genus ), with more than 330-500 species and 200 hybrids, are trees, shrubs or prostrate plants that are widely distributed in Africa, North America, Europe, and Asia. The genus is traditionally used in folk medicine and represents a valuable source of biologically active compounds among them salicin, a prodrug for salicylic acid. Altogether, 322 secondary metabolites were characterized in the genus including flavonoids 94) (flavonols, flavones, flavanones, isoflavones, flavan-3-ols (catechins and procyanidins), chalcones, dihydrochalcone, anthocyanins, dihydroflavonols), phenolic glycosides (76), organic acids (28), and non-phenolic glycosides (17), sterols and terpenes (17), simple phenolics 13) and lignans 7) in addition to volatiles and fatty acids (69).

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The stem (S), leaf (L) and fruit peel (P) of Murcott mandarins were separately extracted using 80% ethanol and then fractionated into dichloromethane (DCM) and ethyl acetate (ET). Their metabolic profiles were studied via HPLC-PDA-ESI-MS/MS and afforded a tentative characterization of 98 compounds, including free organic acids, phenolic acid derivatives, flavonoid aglycones, flavonoid glycosides, flavonoids containing 3-hydroxyl-3-methylglutaroyl (HMG) units, coumarin derivatives and limonoids. Column chromatography resulted in isolation of six metabolites for the first time that were identified as nobiletin (C1), isosinensetin (C2), limonin (C3), 4'-demethylnobiletin (C4), stigmasterol-O-glucoside (C5) and hesperidin (C6).

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Utilizing bioassay- and TLC-guided column chromatography, fifteen secondary metabolites from and eight compounds from were isolated, including a novel plant metabolite salicyl ether and characterized using ultralviolet light (UV) absorbance, mass spectrometry (MS), H-, C-NMR (nuclear magnetic resonance), heteronuclear single quantum coherence spectroscopy (HSQC) and heteronuclear multiple bond correlation (HMBC). The extracts, their sub-fractions and the isolated compounds exhibited promising antioxidant activities in vitro in DPPH and FRAP assays. Also, the extracts of leaf (PL), shoots (PS), and leaf (SL) demonstrated substantial antioxidant activities in vivo in the multicellular model organism .

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Preventive chemotherapy with praziquantel is the mainstay of schistosomiasis control. However, drug resistance is an imminent threat, particularly with large-scale administration of praziquantel, in addition to much less efficacy against young schistosomes. Several biological activities of limonin have been explored such as insecticidal, insect antifeedant, and growth-regulating activity on insects as well as antimalarial, antiviral, anticancer, cholesterol-lowering, and antioxidant activities.

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Hesperidin and neohesperidin are the major flavanones isolated from bittersweet orange. It was recently reported that they have potent anti-inflammatory effects in various inflammatory models. In the present study, the effects of hesperidin and neohesperidin on indomethacin-induced ulcers in rats and the underlying mechanisms were investigated.

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Toll-like receptors have been implicated in inflammation and injury in various tissues and organs including the liver. We have investigated the effects of limonin isolated from the dichloromethane fraction of the seeds of bittersweet orange (Citrus aurantium var. bigaradia) in two dose levels (50 and 100 mg/kg) against D-galactosamine (D-GalN)-induced liver toxicity in comparison with standard silymarin treatment on Toll-like receptors expression and hepatic injury, using a well-established rat model of acute hepatic inflammation.

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The volatile secondary metabolites of essential oils from fruit peel and leaves of variegated pink-fleshed lemon (Citrus x limon) were investigated using GLC and GLC-MS (gas-liquid chromatography-mass spectroscopy). Altogether 141 compounds were identified and quantified, accounting for 99.59% and 96.

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Column chromatography of the dichloromethane fraction from an aqueous methanolic extract of fruit peel of Citrus pyriformis Hassk. (Rutaceae) resulted in the isolation of seven compounds including one coumarin (citropten), two limonoids (limonin and deacetylnomilin), and four sterols (stigmasterol, ergosterol, sitosteryl-3-beta-D-glucoside, and sitosteryl-6'-O-acyl-3-beta-D-glucoside). From the ethyl acetate fraction naringin, hesperidin, and neohesperidin were isolated.

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