A5057352276- Tea Polyphenols and Effects
- Phytochemicals and Antioxidant Activities
- Analytical Chemistry and Chromatography
- Fermentation and Sensory Analysis
- Advanced Chemical Sensor Technologies
- Coffee research and impacts
- Bee Products Chemical Analysis
- Plant biochemistry and biosynthesis
- Biochemical Analysis and Sensing Techniques
- Analytical chemistry methods development
- Metabolomics and Mass Spectrometry Studies
- Heavy Metals in Plants
- Phytochemical compounds biological activities
- Antioxidant Activity and Oxidative Stress
- Sensory Analysis and Statistical Methods
- Algal biology and biofuel production
- Probiotics and Fermented Foods
- Proteins in Food Systems
- Olfactory and Sensory Function Studies
- Electrochemical Analysis and Applications
- Postharvest Quality and Shelf Life Management
- Seaweed-derived Bioactive Compounds
- Natural product bioactivities and synthesis
- Essential Oils and Antimicrobial Activity
- Chromatography in Natural Products
National University of Singapore
2018-2022
Simple sequence repeats (SSR) markers and secondary metabolite composition were used in combination to study seven varieties of citrus for the first time. With reference established accessions citrus, two (Chanh Giay Ma Nao Pan) predicted be Mexican key limes, while three mandarin hybrids (Nagpur, Pontianak Dalandan) remaining (Qicheng Mosambi) related sweet orange. Notably, Dalandan was genetically more like a despite often referred as an orange locally, whereas Mosambi likely hybrid...
Organosulfur compounds (OSCs) in coffee remain challenging to analyze by conventional gas chromatography (GC) due their low concentrations amid coffee's complex matrix and susceptibility chiral-odor influences. In this study, multidimensional GC (MDGC) methods were developed profile OSCs coffee. Conventional was compared comprehensive (GC×GC) for untargeted OSC analysis eight specialty coffees, GC×GC found improve the fingerprinting of (50 vs 16 identified). Of 50 OSCs,...
Twenty-six key odourants were found in Hongxin and Shatian pomelo peel oils using aroma extraction dilution analysis (AEDA). trans-2-Dodecenal was identified to be the most potent odourant, with a flavour value of 100000 10000 Shatian. oil more floral while green peely. Gas chromatography coupled quadrupole time-of-flight mass spectrometry (GC-QTOF/MS) revealed 22 volatiles that undetected by less sensitive GC-MS detector. Non-volatile compounds quantified liquid (LC)-QTOF/MS. Besides...
Summary The structural diversity of polyphenols and the inherent limitations current extraction techniques pose a challenge to extract using simple green method. Hence, in this study, method was developed simultaneously fractionate multiple classes by only varying ethanol‐water solutions. Honeybush tea, which is rich polyphenols, selected as model for study. Solvent followed solid‐phase (SPE) obtain polyphenol‐rich fraction from six honeybush samples. Based on gradient elution programme...
At present, the identification of honeysuckle aroma depends on experienced tasters, which results in inconsistencies due to human error. The key odorants have potential distinguish different species and evaluate quality honeysuckle. Hence, this study, a more scientific approach was applied various honeysuckles. volatile compounds parts were separately extracted by headspace-solid phase microextraction (HS-SPME) solvent assisted flavor evaporation (SAFE). Compounds with greater volatility...
Kumquat and calamansi are two exotic citrus fruits that integral in Asian cuisine. While they possess excellent flavour profiles potential health benefits, have not been as extensively studied other fruits. In this study, the peel oil extracts of four kumquats (Jindou, Youpi, Huapi Suichuan) calamansis (the Philippines Indonesia) were analysed using gas chromatography-mass spectrometry (GC/MS). Principal component analysis (PCA) revealed a distinct separation kumquat calamansi, with...
In this study, neutral loss scan and high-resolution MS/MS were used in combination to detect tentatively identify various flavonoid limonoid glycosides navel orange albedo, juice, peel pulp. These compound classes are of research interest due their flavour bioactive properties, although have been previously studied other food matrices, the best our knowledge, scans not for elucidation glycosides. Neutral masses 120, 162 308 Da selected detection hexose, rutinose neohesperidose-substituted...
Japanese mandarins are becoming increasingly popular due to their pleasant aroma. The volatiles in four varieties of (Iyokan, Ponkan, Shiranui, and Unshiu mikan) were extracted by headspace solid-phase microextraction (HS-SPME) solvent extraction, then analysed gas chromatography–mass spectrometry (GC-MS). Principal component analysis (PCA) the GC-MS data demonstrated distinct segregation all mandarin varieties. Esters, such as neryl acetate, distinguished Iyokan. Methylthymol uniquely...