Wines are complex mixtures of chemical compounds with broad and overlapping absorption and emission spectral features in the UV and visible spectral regions, making them challenging to study with conventional optical spectroscopic techniques. Multidimensional fluorescence spectroscopies correlate fluorescence spectra with other degrees of freedom, and have proven useful for studying complex molecular systems, offering a pathway for the analysis of wines utilising their inherent fluorescence. Here we employ steady-state excitation-emission matrix (EEM) and time-resolved fluorescence spectral measurements to investigate representative commercial white and red wine samples and a fluorescent 'model' wine base. Combining these multidimensional measurement methods provides information on the emission characteristics of the components that wines contain. This investigation illustrates the potential for multidimensional fluorescence techniques as diagnostic tools for the wine industry.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1088/2050-6120/ad64a9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
[Establishment of a quality grading standard of Isatidis Radix decoction pieces based on appearance traits and internal quality indexes].
Zhongguo Zhong Yao Za Zhi
December 2024
Institute of International Standardization for Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine Shanghai 201203, China Shanghai Academy of International Standardization for Traditional Chinese Medicine Shanghai 201203, China.
This study aims to establish a quality grading standard that combines the conventional quality evaluation based on morphological characteristics of traditional Chinese medicine with the modern quality evaluation. Based on the existing standards and market circulation of Isatidis Radix, the diameter and color of Isatidis Radix decoction pieces were selected as the appearance traits for preliminary grading. The effects of internal quality indexes such as moisture, total ash, acid-insoluble ash, ethanol-soluble extractives, and 9 water-soluble components on different grades of decoction pieces were comprehensively compared, and the key grading indexes were determined by t-test.
View Article and Find Full Text PDFAnalysis of Giant-Shell CdSe/CdS Quantum Dots via Analytical Ultracentrifugation Combined with Spectrally Resolved Photoluminescence.
Small Methods
January 2025
Institute of Particle Technology (LFG), Department of Chemical and Biological, Engineering (CBI), Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Cauerstraße 4, 91058, Erlangen, Germany.
Knowledge of the structure-property relationships of functional nanomaterials, including, for example, their size- and composition-dependent photoluminescence (PL) and particle-to-particle variations, is crucial for their design and reproducibility. Herein, the Angstrom-resolution capability of an analytical ultracentrifuge combined with an in-line multiwavelength emission detection system (MWE-AUC) for measuring the sedimentation coefficient-resolved spectrally corrected PL spectra of dispersed nanoparticles is demonstrated. The capabilities of this technique are shown for giant-shell CdSe/CdS quantum dots (g-QDs) with a PL quantum yield (PL QY) close to unity capped with oleic acid and oleylamine ligands.
View Article and Find Full Text PDFQuantitative Study on the Charge-Dependent Uptake of Ultrasmall Fluorescent Gold Nanoclusters in 3D Spheroids of Cancer Cells.
ACS Appl Mater Interfaces
January 2025
State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University (NPU), Xi'an 710072, China.
Gold nanoclusters (AuNCs) have garnered significant attention in biomedical applications, particularly in biosensing, cancer therapy, and imaging, due to their unique optical property, good biocompatibility, and distinct bioactivity. Understanding the cellular uptake behavior of AuNCs is critical to improve the efficacy of their applications, whose mechanism has not been adequately validated. In this work, we synthesized AuNCs with varying surface modifications to quantify the exact law of surface charge on the cellular uptake of AuNCs in a multidimensional manner by using 3D multicellular tumor spheroids of both HeLa cells and MCF-7 cells as the model system.
View Article and Find Full Text PDFApplication of the Time-Domain Multichromophoric Fluorescence Resonant Energy Transfer Method in the NISE Programme.
J Chem Theory Comput
January 2025
Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 3, 9747 AG Groningen, The Netherlands.
We present the implementation of the time-domain multichromophoric fluorescence resonant energy transfer (TC-MCFRET) approach in the numerical integration of the Schrödinger equation (NISE) program. This method enables the efficient simulation of incoherent energy transfer between distinct segments within large and complex molecular systems, such as photosynthetic complexes. Our approach incorporates a segmentation protocol to divide these systems into manageable components and a modified thermal correction to ensure detailed balance.
View Article and Find Full Text PDFPhotoacoustic and fluorescence dual-modality imaging of cerebral biomarkers in Alzheimer's disease rodent model.
J Biomed Opt
December 2024
University of Michigan, Department of Biomedical Engineering, Ann Arbor, Michigan, United States.
Significance: Alzheimer's disease (AD) is a predominant form of dementia that can lead to a decline in the quality of life and mortality. The understanding of the pathological changes requires monitoring of multiple cerebral biomarkers simultaneously with high resolution. Photoacoustic microscopy resolves single capillaries, allowing investigations into the most affected types of vessels.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!