A5102856575- Spectroscopy and Chemometric Analyses
- Advanced biosensing and bioanalysis techniques
- Identification and Quantification in Food
- Advanced Nanomaterials in Catalysis
- Advanced Chemical Sensor Technologies
- Listeria monocytogenes in Food Safety
- Gold and Silver Nanoparticles Synthesis and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Biosensors and Analytical Detection
- Mycotoxins in Agriculture and Food
- Pesticide Residue Analysis and Safety
- Electrochemical sensors and biosensors
- Salmonella and Campylobacter epidemiology
- Metabolomics and Mass Spectrometry Studies
- Insect and Pesticide Research
- Tea Polyphenols and Effects
- Molecular Sensors and Ion Detection
- GABA and Rice Research
- Edible Oils Quality and Analysis
- Meat and Animal Product Quality
- Melamine detection and toxicity
- Nanomaterials for catalytic reactions
- Nanocluster Synthesis and Applications
- Plasmonic and Surface Plasmon Research
- Marine Toxins and Detection Methods
Queen's University Belfast
2018-2024
The implementation of low-cost and rapid technologies for the on-site detection mycotoxin-contaminated crops is a promising solution to address growing concerns agri-food industry. Recently, there have been significant developments in surface-enhanced Raman spectroscopy (SERS) direct mycotoxins food feed. This review provides an overview most recent advancements utilization SERS through successful fabrication novel nanostructured materials. Various bottom-up top-down approaches demonstrated...
Food fraud, along with many challenges to the integrity and sustainability, threatens prosperity of businesses society as a whole. Tea is second most commonly consumed non-alcoholic beverage globally. Challenges tea authenticity require development highly efficient rapid solutions improve supply chain transparency. This study has produced an innovative workflow for black geographical indications (GI) discrimination based on non-targeted spectroscopic fingerprinting techniques. A total 360...
Detection of enzyme biomarkers originating from either bio-fluids or contaminating microorganisms is utmost importance in clinical diagnostics and food safety. Herein, we present a simple, low-cost easy-to-use sensing approach based on the switchable peroxidase-mimicking activity plasmonic gold nanoparticles (AuNPs) that can catalyse for oxidation 3,3',5'5-tetramethylbenzidine (TMB) determination protease enzyme. The AuNP surface modified with casein, showing dual functionalities. first...
Abstract Mercury (Hg) is extremely toxic, and continues to cause major threats aquatic life, human health the environment. Hg 2+ mainly derives from seawater as a product of atmospheric deposition, therefore there great demand for sensing approaches that can detect in samples. Herein, we demonstrate peroxidase-mimicking activity gold nanoparticles (AuNPs) or so-called nanozymes, be exploited detection ions various water In high electrolyte environment, catalytic oxidation...
Abstract Pesticides are a safety issue globally and cause serious concerns for the environment, wildlife human health. The handheld detection of four pesticide residues widely used in Basmati rice production using surface-enhanced Raman spectroscopy (SERS) is reported. Different SERS substrates were synthesised their plasmonic scattering properties evaluated. Using this approach, limits achieved within range 5 ppb-75 ppb, solvent. Various extraction techniques assessed to recover from spiked...
Gold nanostars (AuNSt) amalgamated with mercury ions (Hg 2+ ) results in reduced SERS performance whilst their enzyme-mimicking capability is not deteriorated, thus providing a basis for Hg detection inverse sensitivity.
Embedding Raman reporters within nanosized gaps of metallic nanoparticles is an attractive route for surface-enhanced spectroscopy (SERS) applications, although often this involves complex synthesis procedures that limit their practical use. Herein, we present the tip-selective direct growth silver satellites surrounding gold nanostars (AuNSt@AgSAT), mediated by a dithiol reporter 1,4-benzenedithiol (BDT). We propose BDT embedded nanogaps which form between AuNSt tips and satellites, plays...
Halloumi cheese has recently gained a Protected Designation of Origin (PDO) indicator, which is related to the place (Cyprus) in halloumi made. The PDO label linked with several requirements, e.g., milk species, quantities, etc.; thus, it important study this product regarding authenticity. utility using two spectroscopic techniques, hyperspectral imaging (HSI) (400–1000 nm) and conventional near-infrared spectroscopy (NIR) (800–2500 were assessed for discrimination 17 Cypriot types, could...
This study investigates the behaviour of gold nanoparticles (AuNPs) when exposed to chlorpyrifos, an agricultural pesticide, and its application in detecting pesticide via surface-enhanced Raman spectroscopy (SERS). Under synergistic addition NaCl, AuNPs undergo agglomeration at lower chlorpyrifos concentrations but aggregation higher concentrations, resulting a distinctive nonlinear SERS response. A linear relationship is obtained between 0.001 1 ppm with detection limit (LOD) 0.009 ppm,...
Abstract Background Given the recent detection of tetrodotoxin (TTX) in bivalve molluscs but absence a full collaborative validation study for TTX determination large number shellfish samples, interlaboratory assessment method performance was required to better understand current capabilities accurate and reproducible quantitation using chemical immunoassay methods. Objective The aim conduct an with multiple laboratories, results assess acceptability different testing Methods Homogenous...
There is a growing demand from consumers for more assurance in premium food products such as beef and especially steak. The quality of steak primarily dictated by the maturation which ultimately influences its taste flavor. These enhanced qualities have resulted becoming product that are willing to pay price for. A challenge, however, analyzing maturity traditional analytical techniques. Hyperspectral imaging (HSI) methodology gaining traction mainly due miniaturization, improved optics,...
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Palm oil is one of the most widely consumed food products globally. Despite restriction Sudan dyes as a colouring agent, these still feature prominently in palm adulteration, which occurs developing countries.
G. Davidson, N. Logan and A. Morris, Chem. Commun. (London), 1968, 1044b DOI: 10.1039/C1968001044B