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https://www.readbyqxmd.com/read/28319346/determination-of-oleanolic-acid-in-human-plasma-and-its-association-with-olive-oil-intake-in-healthy-spanish-adults-within-the-epic-spain-cohort-study
#1
Genevieve Buckland, Antoni Pastor, Leila Lujan-Barroso, Carlos Alberto Gonzalez, Noemie Travier, Pilar Amiano, José María Huerta, Antonio Agudo, Carmen Navarro, María Dolores Chirlaque, Maria-José Sánchez, Miguel Rodríguez-Barranco, Aurelio Barricarte, Eva Ardanaz, Miren Dorronsoro, Amaia Molinuevo, José Ramón Quirós, Rafael de la Torre
SCOPE: Oleanolic acid (OA) is an important triterpenic compound found in olive oil, however little is known about its concentrations in human plasma. We aimed to determine plasma OA levels in a healthy Spanish population and compare them with estimates of dietary olive oil intake. METHODS AND RESULTS: The final study sample included 141 individuals randomly selected from the European Prospective Investigation into Cancer and Nutrition Spanish cohort. Dietary olive oil intake was estimated using validated dietary history questionnaires...
February 3, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28318567/determination-of-ochratoxin-a-in-wine-by-packed-in-tube-solid-phase-microextraction-followed-by-high-performance-liquid-chromatography-coupled-to-tandem-mass-spectrometry
#2
Mariane A Andrade, Fernando M Lanças
Ochratoxin A (OTA), a widely studied mycotoxin, can be found in a variety of food matrices. As its concentration in food is generally low (in the order of μg kg(-1)), sample preparation techniques are necessary for the analyte purification and pre-concentration in order to achieve the required low detection limits. The separation and detection methods used for OTA analysis should also offer proper sensitivity in order to allow the adequate quantification of the analyte. This manuscript addresses the development of a methodology aiming the analysis of OTA in wine samples by packed in-tube SPME in flow through extraction mode coupled to HPLC-MS/MS...
March 1, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28317766/first-evidences-of-interaction-between-pyranoanthocyanins-and-salivary-proline-rich-proteins
#3
Ignacio García-Estévez, Luís Cruz, Joana Oliveira, Nuno Mateus, Victor de Freitas, Susana Soares
The contribution of other classes of polyphenol compounds besides tannins to the overall perception of astringency is still poorly understood. So, this work aimed to study the interaction between a family of salivary proline-rich proteins (aPRPs) and representative pyranoanthocyanins in red wines [pyranomalvidin-3-glucoside (vitisin B), pyranomalvidin-3-glucoside-catechol, and pyranomalvidin-3-glucoside-epicatechin] using saturation transfer difference-NMR and MALDI-TOF. For vitisin B KD was of 1.74mM; for pyranomalvidin-3-glucoside-catechol was 1...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28317758/analysis-of-free-and-total-sulfur-dioxide-in-wine-by-using-a-gas-diffusion-analytical-system-with-ph-detection
#4
Pablo Giménez-Gómez, Manuel Gutiérrez-Capitán, Anna Puig-Pujol, Fina Capdevila, Sergio Muñoz, Andreu Tobeña, Antoni Miró, Cecilia Jiménez-Jorquera
The use of sulfur dioxide as preservative in winemaking industry has a direct impact on wine quality. The standard methods to analyze this parameter require several processes and are time consuming. In this paper a simple and rapid analytical method for free and total sulfur dioxide detection is proposed. This method is based on the separation of the analyte from the sample with a permeable gas diffusion membrane and its indirect detection with a pH sensor. The system has been validated and optimized for free sulfur dioxide detection in the range of 1-60mgL(-1) and for total sulfur dioxide in the range of 30-300mgL(-1) with a limit of detection of 0...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28300445/botanicals-with-dermatologic-properties-derived-from-first-nations-healing
#5
Sophia Colantonio, Jason K Rivers
INTRODUCTION: First Nations people have a long history of working with medicinal plants used to treat skin diseases. The purpose was to assess the dermatologic therapeutic potential of western red cedar, white spruce, birch, balsam poplar, and black spruce. METHODS: Based on expert recommendations, 5 trees were selected that were used in First Nations medicine for cutaneous healing and have potential and/or current application to dermatology today. We searched several databases up to June 12, 2014...
February 1, 2017: Journal of Cutaneous Medicine and Surgery
https://www.readbyqxmd.com/read/28290367/chemo-sensory-characterization-of-fractions-driving-different-mouthfeel-properties-in-red-wines
#6
María-Pilar Sáenz-Navajas, José-Miguel Avizcuri, Sara Ferrero-Del-Teso, Dominique Valentin, Vicente Ferreira, Purificación Fernández-Zurbano
No abstract text is available yet for this article.
April 2017: Food Research International
https://www.readbyqxmd.com/read/28290319/consumer-perception-of-balsamic-vinegar-a-cross-cultural-study-between-korea-and-italy
#7
Luisa Torri, Seon-Young Jeon, Maria Piochi, Gabriella Morini, Kwang-Ok Kim
Understanding cross-cultural differences in food perception is a key issue of food research in order to understand consumer behaviour in different countries. The objective of this study was to explore potential cultural differences of balsamic vinegar perception between Korean and Italian consumers using the sorted napping method. Nine balsamic vinegars different in terms of ingredients, aging time, and origin were evaluated by Korean (n=50) and Italian (n=49) consumers using sorted napping. Familiarity and food matching were also examined...
January 2017: Food Research International
https://www.readbyqxmd.com/read/28281252/plasmonics-based-detection-of-virus-using-sialic-acid-functionalized-gold-nanoparticles
#8
Changwon Lee, Peng Wang, Marsha A Gaston, Alison A Weiss, Peng Zhang
Biosensor for the detection of virus was developed by utilizing plasmonic peak shift phenomenon of the gold nanoparticles and viral infection mechanism of hemagglutinin on virus and sialic acid on animal cells. The plasmonic peak of the colloidal gold nanoparticles changes with the aggregation of the particles due to the plasmonic interaction between nearby particles and the color of the colloidal nanoparticle solution changes from wine red to purple. Sialic acid reduced and stabilized colloidal gold nanoparticle aggregation is induced by the addition of viral particles in the solution due to the hemagglutinin-sialic acid interaction...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28278676/comparative-analytical-study-of-the-selected-wine-varieties-grown-in-montenegro
#9
Neda O Đorđević, Miroslav M Novaković, Boris Pejin, Jelena J Mutić, Vlatka E Vajs, Snežana B Pajović, Vele V Tešević
Samples of the selected red wine varieties grown in Montenegro (Merlot, Cabernet Sauvignon and Vranac; vintages 2010-2012) were compared according to total phenolic content, anti-DPPH radical activity, phenolic profile and elemental composition. All the samples showed profound anti-DPPH radical activity, due to high content of total phenolic compounds (R = 0.92). The most abundant phenolics were catechin and gallic acid with the highest values recorded for Merlot 2012 (43.22 and 28.65 mg/L, respectively)...
February 13, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28276907/dietary-sources-of-polyphenols-in-the-mediterranean-healthy-eating-aging-and-lifestyle-meal-study-cohort
#10
Justyna Godos, Stefano Marventano, Antonio Mistretta, Fabio Galvano, Giuseppe Grosso
The aim of this study was to estimate the dietary intake and major food sources of polyphenols in the Mediterranean healthy Eating, Aging and Lifestyles (MEAL) study cohort. A total of 1937 individuals (18 + y) of urban population of Catania, Italy, completed a validated 110-item food frequency questionnaire; Phenol-Explorer database was used to estimate polyphenol intake. Mean intake of polyphenols was 663.7 mg/d; the most abundant classes were phenolic acids (362.7 mg/d) and flavonoids (258.7 mg/d)...
February 9, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/28274416/solid-cation-exchange-phase-to-remove-interfering-anthocyanins-in-the-analysis-of-other-bioactive-phenols-in-red-wine
#11
Letícia Flores da Silva, Celito Crivellaro Guerra, Diandra Klein, Ana Maria Bergold
Bioactive phenols (BPs) are often targets in red wine analysis. However, other compounds interfere in the liquid chromatography methods used for this analysis. Here, purification procedures were tested to eliminate anthocyanin interference during the determination of 19 red-wine BPs. Liquid chromatography, coupled to a diode array detector (HPLC-DAD) and a mass spectrometer (UPLC-MS), was used to compare the direct injection of the samples with solid-phase extractions: reversed-phase (C18) and strong cation-exchange (SCX)...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28274411/alternative-natural-seasoning-to-improve-the-microbial-stability-of-low-salt-beef-patties
#12
Javier García-Lomillo, M A Luisa González-SanJosé, Raquel Del Pino-García, M A Dolores Rivero-Pérez, Pilar Muñiz-Rodríguez
The meat industry is seeking new strategies to reduce the sodium content of meat products without shortening their shelf-life. Natural seasonings as salt alternatives are more appreciated than chemical preservatives and also enable the incorporation of interesting nutrients. The present work studies the potential of a new red wine pomace seasoning (RWPS), derived from wine pomace, to inhibit spoilage growth in beef patties with different salt levels (2%, 1.5% and 1%) held in storage at 4°C. The use of RWPS (2% w/w) improved the microbial stability of the patties, delaying total aerobic mesophilic, and lactic acid bacteria growth, especially in samples with low salt levels...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28272361/a-focused-multiple-reaction-monitoring-mrm-quantitative-method-for-bioactive-grapevine-stilbenes-by-ultra-high-performance-liquid-chromatography-coupled-to-triple-quadrupole-mass-spectrometry-uhplc-qqq
#13
Elías Hurtado-Gaitán, Susana Sellés-Marchart, Ascensión Martínez-Márquez, Antonio Samper-Herrero, Roque Bru-Martínez
Grapevine stilbenes are a family of polyphenols which derive from trans-resveratrol having antifungal and antimicrobial properties, thus being considered as phytoalexins. In addition to their diverse bioactive properties in animal models, they highlight a strong potential in human health maintenance and promotion. Due to this relevance, highly-specific qualitative and quantitative methods of analysis are necessary to accurately analyze stilbenes in different matrices derived from grapevine. Here, we developed a rapid, sensitive, and specific analysis method using ultra-high-performance liquid chromatography coupled to triple-quadrupole mass spectrometry (UHPLC-QqQ) in MRM mode to detect and quantify five grapevine stilbenes, trans-resveratrol, trans-piceid, trans-piceatannol, trans-pterostilbene, and trans-ε-viniferin, whose interest in relation to human health is continuously growing...
March 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28264472/silver-nanoparticle-based-fluorescence-quenching-lateral-flow-immunoassay-for-sensitive-detection-of-ochratoxin-a-in-grape-juice-and-wine
#14
Hu Jiang, Xiangmin Li, Ying Xiong, Ke Pei, Lijuan Nie, Yonghua Xiong
A silver nanoparticle (AgNP)-based fluorescence-quenching lateral flow immunoassay with competitive format (cLFIA) was developed for sensitive detection of ochratoxin A (OTA) in grape juice and wine samples in the present study. The Ru(phen) 3 2 + -doped silica nanoparticles (RuNPs) were sprayed on the test and control line zones as background fluorescence signals. The AgNPs were designed as the fluorescence quenchers of RuNPs because they can block the exciting light transferring to the RuNP molecules. The proposed method exhibited high sensitivity for OTA detection, with a detection limit of 0...
February 28, 2017: Toxins
https://www.readbyqxmd.com/read/28260381/copper-ii-mediated-hydrogen-sulfide-and-thiol-oxidation-to-disulfides-and-organic-polysulfanes-and-their-reductive-cleavage-in-wine-mechanistic-elucidation-and-potential-applications
#15
Gal Y Kreitman, John C Danilewicz, David W Jeffery, Ryan J Elias
Fermentation-derived volatile sulfur compounds (VSCs) are undesirable in wine and are often remediated in a process known as copper fining. In the present study, the addition of Cu(II) to model and real wine systems containing hydrogen sulfide (H2S) and thiols provided evidence for the generation of disulfides (disulfanes) and organic polysulfanes. Cu(II) fining of a white wine spiked with glutathione, H2S, and methanethiol (MeSH) resulted in the generation of MeSH-glutathione disulfide and trisulfane. In the present study, the mechanisms underlying the interaction of H2S and thiols with Cu(II) is discussed, and a prospective diagnostic test for releasing volatile sulfur compounds from their nonvolatile forms in wine is investigated...
March 15, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28242904/bioactive-components-of-prunus-avium-l-black-gold-red-cherry-and-prunus-avium-l-stark-gold-white-cherry-juices-wines-and-vinegars
#16
Nilgün H Budak
Cherries are one of the most popular fruits, characterized by attractive colour, firmness, appearance and delicious tastes. Cherries are consumed fresh as well as in jams, wine, dried, candy and other processed products. Cherries vary in antioxidant properties and phenolic substances. The aim of the study was to determine the effects of ethanol and acetic acid fermentation on total antioxidant activities and phenolic substances of cherry juice. Total investigation of solids, pH, soluble solids, phenolic substances, ORAC and TEAC of Prunus avium L...
January 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28242573/biorelevant-physicochemical-profiling-of-e-and-z-resveratrol-determined-from-isomeric-mixtures
#17
Gábor Orgován, Imre Gonda, Béla Noszál
Biorelevant, isomer-specific physicochemical parameters of resveratrol, a multifunctional component in red wines, with cardioprotective, anti-Alzheimer and several other pharmacologic activities were determined. The parameters include site-specific basicities, lipophilicities, solubilities and diffusion constants for the two geometric isomers. The protonation equilibria of (E)- and (Z)-resveratrol were monitored by (1)H NMR-pH titrations. Five closely related auxiliary compounds ((E)-pinostilbene, (Z)-pinostilbene, (E)-pterostilbene, (Z)-pterostilbene and resorcinol) were also studied...
December 19, 2016: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28239292/assessing-the-efficacy-of-pef-treatments-for-improving-polyphenol-extraction-during-red-wine-vinifications
#18
Guillermo Saldaña, Guillermo Cebrián, María Abenoza, Cristina Sánchez-Gimeno, Ignacio Álvarez, Javier Raso
The influence of the electric field intensity and pulse width on the improvement of total polyphenol index (TPI) and colour intensity (CI) during extraction in an ethanolic solution (30%) and during fermentation-maceration has been investigated in different grape varieties: Grenache from two harvesting times, Syrah and Tempranillo. The aim of this study was to develop a procedure to establish the PEF treatment conditions that cause enough permeabilization in the skin cells of different grape varieties to obtain a significant improvement in the vinification process in terms of increment on the polyphenol content or reduction of maceration time...
February 2017: Innovative Food Science & Emerging Technologies
https://www.readbyqxmd.com/read/28222886/effect-of-different-acidic-solutions-on-the-optical-behavior-of-lithium-disilicate-ceramics
#19
Daniela Micheline Dos Santos, Emily Vivianne Freitas da Silva, Aljomar José Vechiato-Filho, Denis Watanabe, Sandro Basso Bitencourt, Aimée Maria Guiotti, Marcelo Coelho Goiato
STATEMENT OF PROBLEM: The stability of the optical characteristics of dental ceramics is essential. Degradation of these materials resulting from pH or temperature alterations in the oral cavity can lead to treatment failure. PURPOSE: The purpose of this in vitro study was to evaluate the color change (ΔE), the L* coordinate, the translucency parameter, and the contrast ratio of lithium disilicate ceramic exposed to commonly used and potentially colorant solutions...
February 17, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28216605/an-overview-of-stress-induced-resveratrol-synthesis-in-grapes-perspectives-for-resveratrol-enriched-grape-products
#20
REVIEW
Mohidul Hasan, Hanhong Bae
Resveratrol is the most important stilbene phytoalexin synthesized naturally or induced in plants, as a part of their defense mechanism. Grapes and their derivative products, including juice and wine, are the most important natural sources of resveratrol, consisting of notably higher amounts than other natural sources like peanuts. Consumption of red wine with its presence of resveratrol explained the "French Paradox". Hence, the demand of resveratrol from grapes is increasing. Moreover, as a natural source of resveratrol, grapes became very important in the nutraceutical industry for their benefits to human health...
February 14, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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