A novel automated method was developed for the quantitative determination of nine terpenoids that could contribute to the minty notes of red wine bouquet. The method couples headspace SPME-Arrow extraction with GC-MS/MS analysis. PDMS/DVB fiber was chosen for the extraction and an ionization energy of 30 eV permitted to optimize the analyte detection. The optimal sample preparation consists of a two-fold dilution of the wine sample with addition of 4 g of sodium chloride while the most suitable extraction conditions take place at 50 °C for 1 h. The method shows good linearity, intraday variations between 2 and 25%, interday variations between 7 and 23% and recoveries between 80 and 119%. The method exhibits the required low detection (between 3 and 60 ng/L) and quantification (between 6 ng/L and 200 ng/L) limits. These limits have permitted the quantification of the pool of minty terpenoids in fourteen red Bordeaux wines.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.foodchem.2021.130029 | DOI Listing |
Food Chem X
December 2024
Department of Chemistry and Food Technology, Polytechnic University of Madrid, Ciudad Universitaria, S/N, 28040 Madrid, Spain.
Most commercially available red wines undergo alcoholic fermentation by yeasts, followed by a second fermentation with the lactic acid bacteria once the initial process is complete. However, this traditional approach can encounter complications in specific scenarios. These situations pose risks such as stalled alcoholic fermentation or the growth of undesirable bacteria while the process remains incomplete, leaving residual sugars in the wine.
View Article and Find Full Text PDFNeuroscience
December 2024
Department of Neurosurgery, the First Affiliated Hospital, Jiangxi Medical College, Nanchang University, No. 17 Yongwaizheng Street, Nanchang, 330006, Jiangxi, China. Electronic address:
The aim of this study was to assess the potential causal relationship between lifestyle factors and intracranial aneurysms (IAs) using a two-sample Mendelian randomization (MR) approach. The study used a pooled dataset from a genome-wide association study that covered information on 24 lifestyle factors, intracranial aneurysm cases, subarachnoid hemorrhage, and unruptured aneurysms. Five MR methods were applied for analysis by selecting single nucleotide polymorphisms as instrumental variables, with the inverse variance weighting method as the main method.
View Article and Find Full Text PDFNutr Res
October 2024
Institute for Translational Medicine and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Systems Pharmacology and Therapeutics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA. Electronic address:
Excessive alcohol consumption is detrimental to human health, and it is implicated in the development of heart disease, stroke, and cancer. However, the last few decades have given rise to epidemiological evidence suggesting that low-to-moderate consumption of red wine and beer may reduce the risk of cardiovascular diseases. Studies have shown that moderate consumption of wine and beer protects against ischemic stroke, increases HDL plasma concentrations, and reduces platelet aggregation and insulin resistance.
View Article and Find Full Text PDFJ Sci Food Agric
December 2024
Department of Chemistry, University of Turin, Turin, Italy.
Background: The volatile composition of Ruché, a red wine produced from a native grape in Piedmont (Italy), was investigated using headspace-solid phase microextraction (SPME) coupled to gas chromatography-mass spectrometry (GC/MS). The main volatile compounds of the wine were identified and quantified. Chemometric techniques were applied to identify features and possible clusters among the different samples.
View Article and Find Full Text PDFBraz Dent J
December 2024
Post-graduate Program in Oral Science, Prosthodontic Unit, Faculty of Odontology, Federal University of Santa Maria(UFSM), Santa Maria, Rio Grande do Sul, Brazil.
This study evaluated the effect of grinding and finishing treatments (polishing or glaze) on the color stability, translucency and opalescence of a translucent zirconia (3Y-TZP) after immersion in red wine. Discs (Ø= 12 mm; thickness 0.8 mm) of 3Y-TZP (Zenostar T, Ivoclar AG) were randomly allocated (n= 8) according to the surface treatment factor: Ctrl - as-sintered; Gr - grinding with diamond bur #4219; Gr + Pol - grinding followed by polishing; Gr + Gl - grinding followed by glaze.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!