24,848 results match your criteria: "Qatar; University of Leicester[Affiliation]"

Recent Advancements and Applications of Nanosensors in Oral Health: Revolutionizing Diagnosis and Treatment.

Eur J Dent

December 2024

Department of Dentistry, Oral Health Institute, Hamad Medical Corporation, Doha, Qatar, College of Dental Medicine, Qatar University, Doha, Qatar.

Advances in the field of nanomaterials are laying the foundation for the fabrication of nanosensors that are sensitive, selective, specific, cost-effective, biocompatible, and versatile. Being highly sensitive and selective, nanosensors are crucial in detecting small quantities of analytes and early diagnosis of diseases. These devices, operating on the nanoscale, detect signals, such as physical, chemical, optical, electrochemical, or biological, and then transduce them into a readable form.

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Quantum magnetic materials can provide explicit realizations of paradigm models in quantum many-body physics. In this context, SrCu_{2}(BO_{3})_{2} is a faithful realization of the Shastry-Sutherland model for ideally frustrated spin dimers, even displaying several of its quantum magnetic phases as a function of pressure. We perform inelastic neutron scattering measurements on SrCu_{2}(BO_{3})_{2} at 5.

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Purpose: This study aimed to determine the perceptions of senior medical students and recent graduates from College of Medicine (CMED) at Qatar University regarding their undergraduate education and training related to prescribing, their confidence in achieving the learning outcomes specified in the curriculum and their preparedness to prescribe in practice.

Patients And Methods: This was a cross-sectional web-based survey with qualitative elements, utilizing a 22-item pre-validated questionnaire developed through a multi-phase iterative process. The survey was administered to all senior medical students (year 4-6) and recent graduates of CMED at Qatar University.

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Transcatheter Aortic Valve Replacement in Hypertrophic Cardiomyopathy: A Systematic Review and Meta-Analysis.

Catheter Cardiovasc Interv

January 2025

Division of Cardiovascular Diseases, Bridgeport Hospital, Yale New Haven Health, Bridgeport, Connecticut, USA.

Background: The co-existence of severe aortic stenosis (AS) and hypertrophic cardiomyopathy (HCM) is not uncommon. Surgical intervention is the gold standard management. Patients with high surgical risk might undergo transcatheter aortic valve replacement (TAVR).

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Biological variation in laboratory results refers to physiological fluctuations that occur around a homeostatic setpoint (HSP) for various laboratory measurands. Assessment of biological variation includes determining individual variation (CV), group variation (CV), and analytical variation (CV). Reference change value (RCV) is an objective tool for an evidence-based approach to interpret data by assessing the significance of consecutive results in an individual for the diagnosis, prognosis, and monitoring of disease.

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Background: Oral Food Challenges (OFC) are essential for the diagnosis and follow-up of acute Food Protein-Induced Enterocolitis Syndrome (FPIES) because no diagnostic or prognostic biomarkers are available. However, the optimal OFC procedure remains unclear.

Objectives: This systematic review aimed to assess OFC procedures' design and clinical outcomes in patients with FPIES.

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A decrease in REM time during polysomnography (PSG) in patients with obstructive sleep apnea (OSA) can result in underestimation of apnea hypopnea index (AHI). We propose adjusting AHI to normalized REM% in subjects with REM% ≤15% to avoid under diagnosis of OSA. All children who completed diagnostic PSG from 2016 to 2023 with REM% of ≤ 15% of total TST were selected for adjustment.

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Article Synopsis
  • Cardiovascular disease (CVD) is a leading cause of premature death among people living with HIV (PLWH), especially in resource-limited settings like Sub-Saharan Africa.
  • A study analyzed cardiovascular health profiles of 995 participants (492 PLWH and 503 HIV-uninfected) in Mwanza, Tanzania, using modified definitions and Poisson regressions.
  • While PLWH showed better metrics in body mass index, blood pressure, and cholesterol, they had higher smoking rates and lower physical activity, indicating that CVD prevention efforts should prioritize smoking cessation and increasing physical activity levels.
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Introduction: Appendiceal mucinous neoplasms (AMNs) represent a rare and diagnostically challenging group of tumors. This systematic review aims to summarize the reported molecular and immunohistochemical markers (IHC) associated with AMNs and compare them with ovarian mucinous neoplasms (OMNs) and colorectal adenocarcinoma (CRC).

Methods: A comprehensive search was performed in PubMed/MEDLINE/PMC, Scopus, Embase, and Web of Science databases to identify studies looking at IHC and molecular markers in AMNs.

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Purpose: There is increased interest in regenerative therapies (RTs) to treat erectile dysfunction (ED). However, the need for society's guidelines has led to varied practices. This study aims to investigate current global practices, address the heterogeneity in treatment protocols and evaluations, and establish expert recommendations in clinical practice.

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  • Pregnancy involves significant hormonal and metabolic changes to support fetal development, which the study investigates through changes in the salivary microbiome and biochemical markers between the second and third trimesters.
  • Saliva samples from 45 pregnant women were analyzed using advanced DNA sequencing techniques, revealing notable shifts in microbial diversity, including a 3-fold increase in Bacteroidota and changes in other microbial taxa.
  • Biochemical changes included increased BMI, pulse rate, glucose, and cholesterol levels in the third trimester, along with correlations between these factors and microbial abundance, emphasizing the need for monitoring oral health and metabolic health during pregnancy.
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Many dietary supplements commonly used by bodybuilders and athletes carry thrombogenic risks, potentially leading to life-threatening conditions like arterial and venous thrombosis by either elevating testosterone levels or directly interfering with homeostasis. Increased awareness and further research are crucial for consumer safety and supplement regulation.

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Non-carcinogenic health risks assessment of bioaerosols.

MethodsX

June 2025

Qatar Environment and Energy Research Institue (QEERI), Hamad Bin Khalifa University, Doha, Qatar.

Bioaerosols, pose potential health risks, yet quantitative assessments of non-carcinogenic risks from bioaerosol inhalation are limited. This study introduces a novel approach for assessing non-carcinogenic health risks using bioaerosol exposure data. The method employs the Average Daily Dose and Hazard Quotient (HQ) metrics, adapted from US Environmental Protection Agency guidelines, with the Reference Dose (RfD) based on thresholds from the National Institute of Occupational Safety and Health and the American Conference of Governmental Industrial Hygienists.

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Article Synopsis
  • The study investigates the link between elevated vitamin B12 levels and myeloproliferative neoplasms (MPNs), which include types of blood cancers like CML, PV, MF, and ET, suggesting that higher B12 could indicate disease presence and activity.
  • Data from 467 MPN patients showed that 20% had elevated B12 levels, particularly in those with CML, with significant reductions in B12 levels observed after one year of treatment.
  • While increased B12 levels appear related to MPN activity, their effectiveness as a consistent diagnostic marker needs more research to establish reliable sensitivity, specificity, and cutoff values.
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Background: Grounding on the Resource-Based View (RBV) and organization support theory (OST), this study examines the effect of talent management practice (TMP) on perceived organizational support (POS), organizational performance (OP), and employee performance (EP) within the Jordanian telecom sector, with a specific focus on the mediating effect of POS's between TMP-EP and OP relationship.

Methods: This study uses a cross-sectional method to collect data from 397 personnel at three Jordanian telecom enterprises. The Smart-PLS application assisted with structural equation modeling, which was used to examine the data.

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Background: The collum angle, tooth dimensions, root length, and alveolar bone thickness have a significant impact on orthodontic diagnosis and treatment planning. The boundaries of orthodontic tooth movement are determined by alveolar bone thickness and dimensions while the collum angle determines the appropriate positioning of the root relative to the cortical plate. This study aimed to compare the collum angle, crown dimensions, root length, and alveolar bone thickness of the upper and lower incisors, canines, and premolars in subjects with varying anteroposterior relationships.

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Objectives: The Objective Structured Clinical Examination (OSCE) is a key tool in healthcare education, assessing clinical skills and competencies. This study explores OSCE's impact on pharmacists' competence, confidence, and practice readiness, focusing on its role in professional development and long-term practice improvement.

Methods: A cross-sectional survey was conducted among Qatar University pharmacy graduates with at least a year of practice experience.

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Introduction: Migraine is a debilitating neurological disorder characterized by recurrent throbbing, moderate-to-severe headaches that disrupt daily chores, leisure, and social activities of patients, impacting their overall quality of life (QoL). Despite the high disease burden, there is a scarcity of data on migraines within the Middle East (ME) region. Thus, a systematic literature review (SLR) was conducted to examine epidemiological data, treatment patterns, QoL, and unmet needs regarding migraines in the ME region.

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Despite seemingly inexorable imminent risks of food insecurity that hang over the world, especially in developing countries like Pakistan where traditional agricultural methods are being followed, there still are opportunities created by technology that can help us steer clear of food crisis threats in upcoming years. At present, the agricultural sector worldwide is rapidly pacing towards technology-driven Precision Agriculture (PA) approaches for enhancing crop protection and boosting productivity. Literature highlights the limitations of traditional approaches such as chances of human error in recognizing and counting pests, and require trained labor.

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This study investigates the effects of two blended learning strategies on improving tacking technique in Optimist sailing among children aged 11-13. Specifically, it compares video feedback with online written instructions (BLIV) and online written instructions only (BLI). Thirty-one children aged 11-13 years old were randomly divided into three groups with different learning strategies: BLIV, BLI, and a control group (CONT).

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Estimating the numbers and whereabouts of internally displaced people (IDP) is paramount to providing targeted humanitarian assistance. In conflict settings like the ongoing Russia-Ukraine war, on-the-ground data collection is nevertheless often inadequate to provide accurate and timely information. Satellite imagery may sidestep some of these challenges and enhance our understanding of the IDP dynamics.

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Accurate diagnosis of oral lesions, early indicators of oral cancer, is a complex clinical challenge. Recent advances in deep learning have demonstrated potential in supporting clinical decisions. This paper introduces a deep learning model for classifying oral lesions, focusing on accuracy, interpretability, and reducing dataset bias.

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Factors affecting fatigue progression in multiple sclerosis patients.

Sci Rep

December 2024

Nehme and Therese Tohme Multiple Sclerosis Center, American University of Beirut Medical Center, Riad El-Solh, PO Box 11-0236, 1107 2020, Beirut, Lebanon.

Fatigue is one of the most prevalent and disabling symptoms among patients with MS, but there is limited research investigating the longitudinal determinants of fatigue progression. This study aims to identify the sociodemographic, behavioral and clinical characteristics, and therapeutic regimens that are correlated with worsening fatigue over time in patients diagnosed with MS. This is a retrospective chart review of 483 patients.

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Selective Colocalization of GHSR and GLP-1R in a Subset of Hypothalamic Neurons and Their Functional Interaction.

Endocrinology

November 2024

Laboratory of Neurophysiology, Multidisciplinary Institute of Cell Biology [IMBICE; Argentine Research Council (CONICET); Scientific Research Commission, Province of Buenos Aires (CIC-PBA); National University of La Plata], B1906APO La Plata, Buenos Aires, Argentina.

The GH secretagogue receptor (GHSR) and the glucagon-like peptide-1 receptor (GLP-1R) are G protein-coupled receptors with critical, yet opposite, roles in regulating energy balance. Interestingly, these receptors are expressed in overlapping brain regions. However, the extent to which they target the same neurons and engage in molecular crosstalk remains unclear.

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