A simple and highly sensitive colorimetric assay for the visual detection of lead and chromium using ascorbic acid capped gold nanoparticles.

Lead (Pb) and hexavalent chromium (Cr) are highly toxic pollutants with no safe exposure levels, posing significant health risks globally, especially in developing countries. Current detection methods for these metals are often complex and inaccessible, highlighting the urgent need for innovative approaches. In this study, we present a rapid, cost-effective colorimetric assay utilizing ascorbic acid-capped gold nanoparticles (AuNPs) for the selective detection of Pb and Cr ions at levels recommended by regulatory bodies such as the WHO and EPA.

Two decades of ceria nanoparticle research: structure, properties and emerging applications.

Cerium oxide nanoparticles (CeNPs) are versatile materials with unique and unusual properties that vary depending on their surface chemistry, size, shape, coating, oxidation states, crystallinity, dopant, and structural and surface defects. This review encompasses advances made over the past twenty years in the development of CeNPs and ceria-based nanostructures, the structural determinants affecting their activity, and translation of these distinct features into applications. The two oxidation states of nanosized CeNPs (Ce/Ce) coexisting at the nanoscale level facilitate the formation of oxygen vacancies and defect states, which confer extremely high reactivity and oxygen buffering capacity and the ability to act as catalysts for oxidation and reduction reactions.

Dataset on the total phenolic contents and total anti-oxidants capacity in commercially available whiskey.

Data in this article are acquired from 46 naturally distilled whiskey. Whiskey samples were produced in the United Kingdom, United States, Ireland, Scotland, and Canada. Samples differ with their type of distillery including (Blended, finest blended, Malted, single Malted, rye, straight Rye, special blended, and special reserved), years of aging, and ethanol percentages.

Dataset on the content of vitamin D and 25-hydroxyvitamin D in 40 pork (Breitov breed) commodities.

This dataset demonstrates the content of vitamin D and 25-hydroxyvitamin D (25OHD) in boiled, grilled, and raw pork for both lean and whole cuts including ribs, tenderloin, shoulder, neck, belly, and center chops. Total fat content in raw pork cuts was determined by the gravimetric method. Quantification analysis using reverse phase high performance liquid chromatography with UV-DAD connected.

Electrochemically switchable and tunable luciferase bioluminescence.

The biocatalytic activity of electrode-immobilized luciferase followed by bioluminescence emitted from the electrode surface was reversibly tuned and switched by applying electrochemical signals. When a reductive potential (-0.9 V vs.

A magneto-controlled biocatalytic cascade with a fluorescent output.

A biocatalytic cascade based on concerted operation of pyruvate kinase and luciferase with a bioluminescent output was switched reversibly between low and high activity by applying an external magnetic field at different positions or removing it. The enzymes participating in the reaction cascade were bound to magnetic nanoparticles to allow their translocation or aggregation/dispersion to be controlled by the magnetic field. The reaction intensity, measured as the bioluminescent output, was dependent on the effective distances between the enzymes transported on the magnetic nanoparticles controlled by the magnets.

Dataset on the effect of soaking Kale (Brassica Oleraceae L. var. acephala DC.) seeds in solution based on amorphous silicon dioxide on the bioactive components and physiological growth parameters.

This dataset aims to evaluate the effect of different concentrations of amorphous silicon dioxide treatments on soilless-grown Kale (Brassica Oleraceae L. var. acephala DC.

"Smart" Delivery of Monoclonal Antibodies from a Magnetic Responsive Microgel Nanocomposite.

"Smart" drug-delivery systems have significant potential to increase therapeutic efficiency, avoid undesired immune responses, and minimize drug side effects. Herein, we report on an innovative strategy to control the drug release process using two magneto-activated materials operating in the system. One of them, a polyvinyl alcohol (PVA)-diboronate (DB)-interpenetrated (IPN) alginate (Alg) microgel nanocomposite (PVA-DB-IPN-Alg) loaded with magnetic nanoparticles (MNPs), is acting as a drug-delivery system.

Dataset for the content of bioactive components and phytonutrients of ( and ) microgreens.

The data provided in this article were obtained from fresh and dry samples of green Basilic (), red Basilic (), green Mizuna (Brassica rapa var. niposinica), and red Mizuna ( var. pipposinica) microgreens grown in climatic chamber (phytotron) on jute mats for 15 days.

Dataset on the effect of foliar application of different concentrations of silicon dioxide and organosilicon compounds on the growth and biochemical contents of oak leaf lettuce (Lactuca sativa var. crispa) grown in phytotron conditions.

This article presents comparative data regarding the effect of foliar application of silicon dioxide and organosilicon compounds on soilless-grown Oak leaf lettuce (Lactuca sativa var. crispa). Data were derived from dry and fresh samples.

Intrafascicular chondroid-like bodies in the ageing equine superficial digital flexor tendon comprise glycosaminoglycans and type II collagen.

The superficial digital flexor tendon (SDFT) is considered functionally equivalent to the human Achilles tendon. Circular chondroid depositions scattered amongst the fascicles of the equine SDFT are rarely reported. The purpose of this study was the detailed characterization of intrafascicular chondroid-like bodies (ICBs) in the equine SDFT, and the assessment of the effect of ageing on the presence and distribution of these structures.

Microwave Irradiation Synthesis and Characterization of Reduced-(Graphene Oxide-(Polystyrene-Polymethyl Methacrylate))/Silver Nanoparticle Nanocomposites and their Anti-Microbial Activity.

Herein, we report a facile process for the preparation of styrene and methyl-methacrylate copolymer nanocomposites containing reduced graphene oxide and silver nanoparticles ((R-(GO-(PS-PMMA))/AgNPs)) by using (i) microwave irradiation (MWI) to obtain R-(GO-(PS-PMMA))/AgNPs and (ii) the in situ bulk polymerization technique to produce RGO/AgNPs-(PS-PMMA). Various characterization techniques, including FT-IR, XPS, Raman spectroscopy, XRD, SEM, HR-TEM, DSC, and TGA analysis, were used to characterize the prepared nanocomposites. The Berkovich nanoindentation method was employed to determine the hardness and elastic modulus of the nanocomposites.

[MORAXELLA OSLOENSIS BACTEREMIA WITH PNEUMONIA: FIRST REPORTED CASE IN ISRAEL].

Community acquired pneumonia (CAP), an acute infection of the pulmonary parenchyma acquired in the community, is generally treated in an outpatient setting and involves different etiological agents. In the adult community, the most common pathogen in the disease is Streptococcus pneumonia, though other multiple etiological agents (atypical) have been involved, including Mycoplasma pneumoniae, Chlamydophila pneumoniae, and Legionella pneumophila. The genus Moraxella consists of aerobic, oxidase-positive gram-negative coccobacilli.

Easy-to-use and inexpensive sensors for assessing the quality and traceability of cosmetic antioxidants.

We describe an easy-to-use sensor as a tool to quantify and authenticate antioxidant active ingredients in cosmetic products. The sensing platform comprises a responsive nanoengineered surface that reacts specifically and generates distinct optically detectable signals that are representative of the chemical composition and concentration of active ingredients. The platform can be inexpensively produced in large quantities and a procedure to manufacture the sensors by 3D printing is described.

Exploring the Knowledge, Attitude and Practice Regarding Hepatitis B Infection Among Dental Students in Saudi Arabia: A Cross-Sectional Study.

Background: Hepatitis B infection is a universal health problem. Worldwide, 5% of health-care-related injections continued unsafe. Dentist considers being at high-risk group for cross infection.

Nanomaterial-functionalized Cellulose: Design, Characterization and Analytical Applications.

Cellulose-nanomaterial hybrid systems are promising platforms for the development of portable devices that can be used for fast and inexpensive analysis in the clinical, environmental and food monitoring fields. By combining the chemical and physical properties of the cellulosic network with the unique optical, electrical and catalytic functions of nanomaterials, it is possible to create versatile devices with engineered sensing functions. This review describes the most commonly used types of nanomaterials, their unique properties and assembly in hybrid structures in conjunction with cellulose paper and provides an overview of the most commonly used detection methodologies and their performance for selected applications.

Europium-Doped Cerium Oxide Nanoparticles Limit Reactive Oxygen Species Formation and Ameliorate Intestinal Ischemia-Reperfusion Injury.

Accumulating evidence suggests that ischemia-reperfusion-induced injury is associated with the formation of reactive oxygen species (ROS). This study demonstrates the therapeutic effectiveness of novel europium-doped cerium oxide nanoparticles (Eu-doped Ceria NPs) as ROS scavengers in a mouse model of intestinal ischemia-reperfusion-induced injury. An increased production of superoxide radicals is detected in the intestine throughout the ischemia stage and again after initiating reperfusion.

Functional Paper-Based Platform for Rapid Capture and Detection of CeO Nanoparticles.

Development of systems for capture, sequestration, and tracking of nanoparticles (NPs) is becoming a significant focus in many aspects of nanotechnology and environmental research. These systems enable a broad range of applications for evaluating concentration, distribution, and effects of NPs for environmental, clinical, epidemiological, and occupational exposure studies. Herein, we describe the first example of a ligand-graft multifunctional platform for capture and detection of cerium oxide (CeO or ceria) NPs.

Quantitative assay for the detection, screening and reactivity evaluation of nanoceria particles.

Increasing use of engineered nanoparticles (NPs) in many industrial processes and consumer products requires rapid analytical methodologies to reliably detect and screen samples for the presence of NPs. Here, we report the development, analytical characterization and performance evaluation of a colorimetric assay as a comprehensive test for quantitative detection, screening and reactivity evaluation of nanoceria (cerium oxide, CeO) particles in aqueous environments. We provide a critical discussion of the role of environmental conditions including pH, ionic composition, and presence of humic acid and particle type on the overall performance and sensitivity of this assay.

Functional nanostructures for enzyme based biosensors: properties, fabrication and applications.

With the increased use of nanobiotechnology-enabled solutions for diagnostics, therapeutics, bioelectronics, environmental, and energy-related applications, there exists a great demand for developing manufacturing processes that can reliably and reproducibly generate functional nanostructures with bioactive properties at low cost and in large quantities for implementation in practical devices. Interest in the development of field portable monitoring devices has increased throughout the past decade. Herein we describe fabrication, characterization and performance of portable and printable enzyme biosensors based on functional enzyme-nanoparticle conjugates.

Clinical characteristics and outcomes of Yemeni patients with acute heart failure aged 50years or younger: Data from Gulf Acute Heart Failure Registry (Gulf CARE).

Aims: There is a shortage of data about acute heart failure (AHF) in the young, including its underlying causes, clinical presentation and outcomes. We aim to describe clinical characteristics, causes and outcomes of AHF in Yemeni patients aged 50years or younger.

Methods And Results: we evaluated Yemeni patients with AHF enrolled in Gulf CARE registry.

Graphene based enzymatic bioelectrodes and biofuel cells.

The excellent electrical conductivity and ease of functionalization make graphene a promising material for use in enzymatic bioelectrodes and biofuel cells. Enzyme based biofuel cells have attracted substantial interest due to their potential to harvest energy from organic materials. This review provides an overview of the functional properties and applications of graphene in the construction of biofuel cells as alternative power sources.

Microwave Irradiation Effect on the Dispersion and Thermal Stability of RGO Nanosheets within a Polystyrene Matrix.

Polystyrene-reduced graphene oxide (PSTY/RGO) composites were prepared via the bulk polymerization method using two different preparation techniques. The general approach is to use microwave irradiation (MWI) to enhance the exfoliation and the dispersion of RGO nanosheets within the PSTY matrix. In the first approach, a mixture of GO and styrene monomers (STY) were polymerized using a bulk polymerization method facilitated by microwave irradiation (MWI) to obtain R-(GO-PSTY) composites.

Synthesis and characterization of the in situ bulk polymerization of PMMA containing graphene sheets using microwave irradiation.

Polymethylmethacrylate-graphene (PMMA/RGO) nanocomposites were prepared via in situ bulk polymerization using two different preparation techniques. In the first approach, a mixture of graphite oxide (GO) and methylmethacrylate monomers (MMA) were polymerized using a bulk polymerization method with a free radical initiator. After the addition of the reducing agent hydrazine hydrate (HH), the product was reduced via microwave irradiation (MWI) to obtain R-(GO-PMMA) composites.