Synthesis of Stable Aluminum Nanoparticles at Varying Reactant Concentrations and Their Surface-Enhanced Raman Scattering Activity.

Aluminum nanoparticles (Al NPs) were synthesized via catalyzed thermal reduction of an aluminum precursor in the presence of a capping ligand. A systematic study was conducted to examine the effect of dilution on nanoparticle synthesis by varying the volume of anhydrous toluene across four dilution factors while maintaining constant molar quantities of the aluminum precursor, catalyst, and ligand. This methodology is relevant for scale-up processes, where more dilute conditions can mitigate nanoparticle reactivity and enhance safety.

Promoting Effect of Ruthenium on Fe-Catalyzed Growth of Small-Diameter Single-Wall Carbon Nanotubes.

The role of Ru promotion of Fe catalysts in the growth of small-diameter single-wall carbon nanotubes (SWCNTs) has been investigated using an Autonomous Research System (ARES)a high throughput, laser-induced chemical vapor deposition (CVD) system capable of in situ Raman spectroscopy. Growth experiments in the ARES were conducted using a standard feedstock (ethylene) at 800 °C for Fe-Ru and Fe catalysts. The results show that Fe-Ru (with a composition ∼10%) supports the growth of small-diameter SWCNTs (less than 1.

Chiral Phonons and Anomalous Excitation-Energy-Dependent Raman Intensities in Layered AgCrPSe.

Structural anisotropy in layered two-dimensional materials can lead to highly anisotropic optical absorption which, in turn, can profoundly affect their phonon modes. These effects include lattice orientation-dependent and excitation energy-dependent mode intensities that can enable next-generation phononic and optoelectronic applications. Here, we report anomalous Raman spectra in single-crystalline AgCrPSe, a layered antiferromagnetic material.

Covalently Doped and Highly Oriented Covalent Organic Framework Thin Films.

Strict control of both crystallographic orientation and band structure is crucial in realizing future high performing semiconducting microelectronic devices based on 2D covalent organic frameworks (COFs). Due to the insoluble nature from extensive aromaticity, processing of these materials into well-ordered, highly crystalline thin films presents a great challenge. In this work, a strategy to enable controlled covalent doping of imine COF thin films with thiophene linkers is presented.

Workplace violence in the healthcare setting and its psychological impact on healthcare workers.

Background: Workplace violence (WPV) among healthcare workers (HCWs) poses a significant burden globally. Various studies have estimated the prevalence and characteristics of WPV, but few have assessed the impact in terms of the mental health of HCWs in the aftermath.

Aim: To study the prevalence of WPV and its psychological impact on HCWs.

Biomimetic remineralization of enamel and dentin with chicken eggshell slurry: An study.

Context: In the light of escalating focus on preventive and minimally invasive dental practices, this study explores the potential of chicken eggshell powder (CESP) as an eco-friendly source of calcium and bioactive compounds for remineralization of demineralized dental substrates.

Aims: The aims of this study were to characterize and evaluate the remineralization potential of CESP slurry on demineralized human permanent teeth.

Subjects And Methods: CESP was prepared from chicken eggshell using calcination procedure followed which CESP slurry was prepared.

Investigation of Composition-Dependent Phonon Spectra in In-Plane Heterostructured CuInPS by Brillouin Light Scattering.

CuInPS (CIPS) is a two-dimensional van der Waals material that is ferrielectric at room temperature ( of 315 K). This can be raised up to 335 K by synthesizing CIPS with Cu deficiencies (CuInPS, CIPS-IPS), which causes the material to self-segregate into separate CIPS and InPS (IPS) domains. Using Brillouin light scattering microscopy, we examine the phonon spectra of CIPS, IPS, and CIPS-IPS (x = 0.

Unconventional unidirectional magnetoresistance in heterostructures of a topological semimetal and a ferromagnet.

Unidirectional magnetoresistance (UMR) in a bilayer heterostructure, consisting of a spin-source material and a magnetic layer, refers to a change in the longitudinal resistance on the reversal of magnetization and originates from the interaction of non-equilibrium spin accumulation and magnetization at the interface. Since the spin polarization of an electric-field-induced non-equilibrium spin accumulation in conventional spin-source materials is restricted to be in the film plane, the ensuing UMR can only respond to the in-plane component of magnetization. However, magnets with perpendicular magnetic anisotropy are highly desired for magnetic memory and spin-logic devices, whereas the electrical read-out of perpendicular magnetic anisotropy magnets through UMR is critically missing.

Platelet-Rich Fibrin in Surgical Endodontics: A Report of Two Cases Demonstrating Its Benefits.

Surgical endodontics is the last resort to manage persistent periapical lesions, which do not respond to conventional endodontic treatment. The rationale of periapical surgery is to remove all infected tissues and provide a sealed environment that promotes the healing of periradicular tissues. In order to enhance healing, several biomaterials have been utilized, such as bone grafts, collagen membranes, and platelet concentrates.

Effect of Liners on Pulpal Outcome After Partial Caries Removal in Permanent Teeth: A Systematic Review and Meta-Analysis.

Partial caries removal reduces the risk of pulp exposure while preserving the tooth structure that is otherwise unnecessarily lost during the cavity preparation. Liners are applied on the dentinal floors to induce the formation of tertiary dentin that effectively blocks the stimuli from reaching the pulp. The present systematic review was conducted to evaluate the effect of liners on pulp vitality after partial caries removal in permanent teeth.

Medium vessel occlusions in the drip-and-ship model: Clinical vs. hub CTP-supported decision making.

Introduction: Mechanical thrombectomy (MT) for medium vessel occlusions (MeVO) is emerging as a promising treatment in acute stroke. We aim to evaluate the utility of additional imaging (CTP) in patients with MeVOs who received thrombolysis at a spoke hospital and were transferred to the hub.

Methods: This was a retrospective review of prospectively collected data from April 2018 to June 2023.

Safety of Adjunctive Intraarterial Tenecteplase Following Mechanical Thrombectomy: The ALLY Pilot Trial.

Background: Recent studies suggest that the use of adjunctive intraarterial alteplase after mechanical thrombectomy (MT) may improve outcomes; however, there are limited data on the use of intraarterial tenecteplase, a newer-generation lytic, in this acute ischemic stroke patient population. Here, we evaluate the use of intraarterial tenecteplase in the ALLY pilot study (Adjunctive Intraarterial Tenecteplase Following Mechanical Thrombectomy).

Methods: ALLY was a prospective, single-center, nonrandomized pilot study assessing the feasibility and safety of intraarterial tenecteplase up to 4.

Mechanistic Analysis of Peptide Affinity to Single-Walled Carbon Nanotubes and Volatile Organic Compounds Using Chemiresistors.

Peptides, due to their diverse and controllable properties, are used as both liquid and gas phase recognition elements for both biological and chemical targets. While it is well understood how binding of a peptide to a biomolecule can be converted into a sensing event, there is not the same mechanistic level of understanding with regard to how peptides modulate the selectivity of semiconductor/conductor-based gas sensors. Notably, a rational, mechanistic study has not yet been performed to correlate peptide properties to the sensor response for volatile organic compounds (VOCs) as a function of chemical properties.

Continuous Flow Chemistry and Bayesian Optimization for Polymer-Functionalized Carbon Nanotube-Based Chemiresistive Methane Sensors.

We report the preparation of poly(ionic) polymer-wrapped single-walled carbon nanotube dispersions for chemiresistive methane (CH) sensors with improved humidity tolerance. Single-walled CNTs (SWCNTs) were noncovalently functionalized by poly(4-vinylpyridine) (P4VP) with varied amounts of a poly(ethylene glycol) (PEG) moiety bearing a Br and terminal azide group (Br-R). The quaternization of P4VP with Br-R was performed using continuous flow chemistry and Bayesian optimization-guided reaction selection.

A comprehensive comparison of machine learning models for ICH prognostication: Retrospective review of 1501 intra-cerebral hemorrhage patients from the Qatar stroke database.

Multiple prognostic scores have been developed to predict morbidity and mortality in patients with spontaneous intracerebral hemorrhage(sICH). Since the advent of machine learning(ML), different ML models have also been developed for sICH prognostication. There is however a need to verify the validity of these ML models in diverse patient populations.

Assessment of mechanical allodynia in healthy teeth adjacent and contralateral to endodontically diseased teeth: a clinical study.

Objectives: The present study investigated the prevalence of mechanical allodynia (MA) in healthy teeth adjacent and contralateral to endodontically diseased teeth.

Materials And Methods: This cross-sectional study included 114 patients with symptomatic irreversible pulpitis and apical periodontitis in permanent mandibular first molars who possessed healthy teeth adjacent and contralateral to the endodontically diseased tooth. The mechanical sensitivity of the teeth was determined by percussion testing.

Comparing the Efficacy of 5% EMLA Cream and 20% Benzocaine Gel on Gingival Tissue Surrounding Non-Carious Cervical Lesions for Reduction of Pain Following Rubber Dam Clamp Placement: A Split-Mouth Randomized Clinical Trial.

Aim The aim of this study was to evaluate the effectiveness of 5% eutectic mixture of local anesthetics (EMLA) cream and 20% benzocaine gel in reduction of pain during rubber dam clamp placement in the treatment of non-carious cervical lesions (NCCLs). Methodology In this split-mouth single-blind randomized clinical trial, 50 adult participants were selected from the outpatient department. The test group was treated using 5% EMLA cream for three minutes, and visual analog scale (VAS) scores were recorded.

Medium vessel occlusion thrombectomy: Single center experience using the 3 MAX catheter.

Introduction: Thrombectomy for medium vessel occlusion is a topic of great interest. We describe a single-center experience with the Penumbra 3-MAX aspiration catheter in stroke thrombectomy of medium vessel occlusion(MeVO). We investigated the use of 3-MAX as a de-novo first pass catheter and as a rescue aspiration device following attempted thrombectomy with other devices.

Comparative evaluation of increase in temperature on the external root surface of teeth during retrieval of broken NiTi instrument using two ultrasonic tips and two power settings: An study.

Context: An unfavorable event that can hinder endodontic treatment and affect the outcome of root canal treatment is the separation of endodontic instruments. Endodontic instrument separation can occur due to clinical or metallurgical factors. Friction between the ultrasonic tip and the remaining dentin generates heat, which is subsequently transferred to the external root surface.

Surgical rescue mitral valve procedure post percutaneous transluminal mitral commissurotomy-a single-center observational study.

Percutaneous transluminal mitral commissurotomy (PTMC) has become the standard of care for severe mitral stenosis with favorable anatomy. Although the complications have reduced over the years, the need for emergency surgical rescue persists. This study evaluates the outcomes of surgical rescue performed within 24 h of undergoing PTMC from 1 January 2013 to 31 December 2019.

Blood Pressure after Successful Endovascular Therapy: A Systematic Review and Meta-Analysis of Randomized Control Trials.

Objective: There are limited data evaluating the optimum blood pressure (BP) goal post mechanical thrombectomy (MT) and its effect on outcomes of patients with large vessel occlusions (LVO). The objective of this study was to compare the efficacy and safety of intensive versus conventional BP control after reperfusion with MT via a systematic review and meta-analysis of randomized controlled trials (RCTs).

Methods: We searched PubMed and Embase to obtain articles related to BP control post MT through September 2023.

Graphene exfoliation using multidomain peptides.

Liquid-phase exfoliation using biomolecules in aqueous solution is a promising approach to obtain high quality 2D nanosheets. For example, the well-studied graphene-binding peptide, P1 (sequence HSSYWYAFNNKT), has been previously investigated and shown to have a good ability to exfoliate graphene sheets in aqueous conditions under sonication, maintaining colloidal stability. Building on this, the biomolecular exfoliant and assembly motif (BEAM) peptide, that features a graphene-binding domain at one end and a hexagonal boron nitride (h-BN) binding domain at the other, separated by a 10-carbon fatty acid chain in the centre, is shown to exfoliate graphene sheets from bulk graphite in aqueous media.

Early and late basilar artery thrombectomy time window outcomes.

Importance: Stroke-to-recanalization time is a strong predictor of outcomes in anterior circulation large-vessel occlusion (LVO). The authors aimed to evaluate functional outcomes in early (<6 h) vs. late (6-24 h) time windows for thrombectomy-treated basilar artery occlusions.

Association between HDL levels and stroke outcomes in the Arab population.

Low HDL levels are associated with an increased stroke incidence and worsened long-term outcomes. The aim of this study was to assess the relationship between HDL levels and long-term stroke outcomes in the Arab population. Patients admitted to the Qatar Stroke Database between 2014 and 2022 were included in the study and stratified into sex-specific HDL quartiles.