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https://www.readbyqxmd.com/read/28635282/fining-of-red-wine-monitored-by-multiple-light-scattering
#1
Giovanna Ferrentino, Mohsen Ramezani, Ksenia Morozova, Daniela Hafner, Ulrich Pedri, Konrad Pixner, Matteo Scampicchio
This work describes a new approach based on multiple light scattering to study red wine clarification processes. The whole spectral signal (1933 backscattering points along the length of each sample vial) were fitted by a multivariate kinetic model that was built with a three-step mechanism, implying: 1) adsorption of wine colloids to fining agents; 2) aggregation into larger particles; 3) sedimentation. Each step is characterized by a reaction rate constant. According to the first reaction, the results showed that gelatin was the most efficient fining agent, concerning the main objective, which was the clarification of the wine, and consequently the increase in its limpidity...
June 21, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28633312/the-influence-of-dekkera-bruxellensis-on-the-transcriptome-of-saccharomyces-cerevisiae-and-on-the-aromatic-profile-of-synthetic-wine-must
#2
Janez Kosel, Neža Cadež, Dorit Schuller, Laura Carreto, Ricardo Franco-Duarte, Peter Raspor
A double compartment membrane system was constructed in order to systematically study possible microbial interactions between yeasts Saccharomyces cerevisiae and Dekkera bruxellensis and their impact on wine aroma. The presence of D. bruxellensis induced 77 transcripts of S. cerevisiae. These were mostly of unknown function; however, some were involved in thiamine biosynthesis and in amino acid and polyamine transport, suggesting a competitive relationship between the two yeast species. Among the transcripts with no biological function, 14 of them were found to be the members of the PAU gene family that is associated with response to anaerobiosis stress...
June 1, 2017: FEMS Yeast Research
https://www.readbyqxmd.com/read/28630643/improved-classification-accuracy-of-powdery-mildew-infection-levels-of-wine-grapes-by-spatial-spectral-analysis-of-hyperspectral-images
#3
Uwe Knauer, Andrea Matros, Tijana Petrovic, Timothy Zanker, Eileen S Scott, Udo Seiffert
BACKGROUND: Hyperspectral imaging is an emerging means of assessing plant vitality, stress parameters, nutrition status, and diseases. Extraction of target values from the high-dimensional datasets either relies on pixel-wise processing of the full spectral information, appropriate selection of individual bands, or calculation of spectral indices. Limitations of such approaches are reduced classification accuracy, reduced robustness due to spatial variation of the spectral information across the surface of the objects measured as well as a loss of information intrinsic to band selection and use of spectral indices...
2017: Plant Methods
https://www.readbyqxmd.com/read/28630625/quantification-of-antioxidant-phenolic-compounds-in-a-new-chrysanthemum-cultivar-by-high-performance-liquid-chromatography-with-diode-array-detection-and-electrospray-ionization-mass-spectrometry
#4
Ah-Reum Han, Hyo Young Kim, Yangkang So, Bomi Nam, Ik-Soo Lee, Joo-Won Nam, Yeong Deuk Jo, Sang Hoon Kim, Jin-Baek Kim, Si-Yong Kang, Chang Hyun Jin
The flowers of Chrysanthemum morifolium Ramat. have been used as an herbal tea and in traditional medicine, and the plant has been developed to produce horticultural cultivars of various colors and shapes. In this study, a new chrysanthemum cultivar with dark purple petals (C. morifolium cv. ARTI-Dark Chocolate; ADC) was developed by radiation-induced mutation breeding of its original cultivar with purple striped white petals (C. morifolium cv. Noble Wine, NW). The phenolic profile and antioxidant property of ADC were investigated and compared with NW and the commercially available medicinal herb, C...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28627947/-the-standardized-mortality-numbers-of-patients-with-gastrointestinal-tumors-and-cardiovascular-diseases-in-four-wine-regions-and-in-one-not-wine-region-of-hungary-between-2000-2010
#5
János Nagy, Sándor Sipka, Judit Kocsis, Zsolt Horváth
INTRODUCTION: Eating habits act on mortalities from gastrointestinal tumors and cardiovascular diseases. AIM: To investigate the role of wine drinking on these mortalities in Hungary. METHOD: The standardized mortality data of people from 206,159 subjects died of gastrointestinal tumors and cardiovascular diseases between 2000-2010 were compared in four wine regions: Tokaj (white), Eger (red), Balaton (white), Szekszárd/Villány (red) and in Hódmezővásárhely (not-wine region)...
June 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28623992/near-infrared-fluorescence-lymphatic-imaging-of-klippel-tr%C3%A3-naunay-syndrome
#6
John C Rasmussen, Rodrick C Zvavanjanja, Melissa B Aldrich, Matthew R Greives, Eva M Sevick-Muraca
The relationship between lymphatic and venous malformations in Klippel-Trénaunay syndrome is difficult to assess. Herein the authors describe near-infrared fluorescence lymphatic imaging to assess the lymphatics of a subject with a large port-wine stain and right leg edema. Although lymphatic vessels in the medial, affected knee appeared dilated and perhaps tortuous, no definitive abnormal lymphatic pooling or propulsion was observed. The lymphatics in the affected limb were well defined but less numerous than in the contralateral limb, and active, contractile function was observed in all vessels...
July 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28621110/characterization-of-microbial-communities-in-chinese-rice-wine-collected-at-yichang-city-and-suzhou-city-in-china
#7
Yucai Lyu, Yanli Gong, Yajie Li, Zejiang Pan, Yi Yao, Ning Li, Jinling Guo, Dachun Gong, Yihong Ti, Caiyun Peng
Two typical microbial communities from Chinese rice wine fermentation collected in Yichang city and Suzhou city in China were investigated. Both communities could ferment glutinous rice to rice wine in 2 d. The sugar and ethanol contents were 198.67 and 14.47 mg/g, respectively, for rice wine from Yichang city, and 292.50 and 12.31 mg/g, respectively, for rice wine from Suzhou city. Acetic acid and lactic acid were the most abundant organic acids. Abundant fungi and bacteria were detected in both communities by high-throughput sequencing...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28618374/proteomic-profiling-of-german-dornfelder-grape-berries-using-data-independent-acquisition
#8
Matthias Riebel, Petra Fronk, Ute Distler, Stefan Tenzer, Heinz Decker
Grapevine is one of the most important fruit plants throughout the world. Sequencing of the grape genome in 2007 enabled in-depth analyses of the grape proteome. Whereas many studies addressed changes in proteomic composition of grapes during ripening, we focused on the proteome of mature grape berries from Dornfelder, a characteristic red wine grape for Germany. Current data-independent acquisition proteomics technology enables the analysis of proteomic compositions in a degree of accuracy that was unreachable only a few years ago...
June 7, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28616012/corrigendum-from-vineyard-soil-to-wine-fermentation-microbiome-approximations-to-explain-the-terroir-concept
#9
Ignacio Belda, Iratxe Zarraonaindia, Matthew Perisin, Antonio Palacios, Alberto Acedo
[This corrects the article on p. 821 in vol. 8, PMID: 28533770.].
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28615787/pimozide-an-old-wine-in-a-new-bottle
#10
Ahmed Naguy
No abstract text is available yet for this article.
May 2017: Indian Journal of Psychological Medicine
https://www.readbyqxmd.com/read/28615419/dimeric-fc%C3%AE-receptor-enzyme-linked-immunosorbent-assay-to-study-hiv-specific-antibodies-a-new-look-into-breadth-of-fc%C3%AE-receptor-antibodies-induced-by-the-rv144-vaccine-trial
#11
Milla R McLean, Vijaya Madhavi, Bruce D Wines, P Mark Hogarth, Amy W Chung, Stephen J Kent
Ab-dependent cellular cytotoxicity (ADCC) responses are of growing interest in the HIV vaccine field but current cell-based assays are usually difficult to reproduce across laboratories. We developed an ELISA and multiplex assay to model the cross-linking of Fcγ receptors (FcγR) by Abs, which is required to initiate an ADCC response. Our FcγR dimer ELISA readily detected Abs in samples from two separate cohorts of the partially efficacious Thai RV144 HIV vaccine efficacy trial. The FcγR dimer-binding Abs induced by the RV144 regimen correlated well with a functional measure of ADCC as well as IgG subclasses...
June 14, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28614047/estimating-how-extra-calories-from-alcohol-consumption-are-likely-an-overlooked-contributor-to-youth-obesity
#12
Kate Battista, Scott T Leatherdale
INTRODUCTION: Youth obesity rates in Canada continue to rise. In this study, we produced conservative estimates of the potential excess calories from alcohol use across different alcohol consumption patterns common among Canadian youth to assess whether alcohol use should be considered in future obesity prevention strategies. METHODS: Using data from 10 144 Grade 12 students participating in the COMPASS study (2013/14), we estimated the number of calories consumed per year from alcohol consumption...
June 2017: Health Promotion and Chronic Disease Prevention in Canada
https://www.readbyqxmd.com/read/28611795/grape-composition-under-abiotic-constrains-water-stress-and-salinity
#13
REVIEW
José M Mirás-Avalos, Diego S Intrigliolo
Water stress and increasing soil salt concentration represent the most common abiotic constrains that exert a negative impact on Mediterranean vineyards performance. However, several studies have proven that deficit irrigation strategies are able to improve grape composition. In contrast, irrigation with saline waters negatively affected yield and grape composition, although the magnitude of these effects depended on the cultivar, rootstock, phenological stage when water was applied, as well as on the salt concentration in the irrigation water...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28610737/the-impact-of-wine-components-on-fractionation-of-cu-and-fe-in-model-wine-systems-macromolecules-phenolic-and-sulfur-compounds
#14
Nikolaos Kontoudakis, Mark Smith, Anque Guo, Paul A Smith, Geoffrey R Scollary, Eric N Wilkes, Andrew C Clark
A variety of techniques have been developed with the ability to measure different forms of metals in wine with the ultimate aim of providing a more accurate indicator of metal induced spoilage of wine. This study was conducted in order to identify which wine components influence the measurement of Cu and Fe in their fractionated and/or electrochemically active forms. The measurement techniques involved detection of labile Cu by stripping potentiometry and fractionation of Cu and Fe by sequential solid phase extraction, with detection by inductively coupled plasma-optical emission spectroscopy...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610735/indications-of-the-prominent-role-of-elemental-sulfur-in-the-formation-of-the-varietal-thiol-3-mercaptohexanol-in-sauvignon-blanc-wine
#15
Leandro Dias Araujo, Sebastian Vannevel, Astrid Buica, Suzanne Callerot, Bruno Fedrizzi, Paul A Kilmartin, Wessel J du Toit
Elemental sulfur is a fungicide traditionally used to control Powdery Mildew in the production of grapes. The presence of sulfur residues in grape juice has been associated with increased production of hydrogen sulfide during fermentation, which could take part in the formation of the varietal thiol 3-mercaptohexanol. This work examines whether elemental sulfur additions to Sauvignon blanc juice can increase the levels of sought-after varietal thiols. Initial trials were performed in South Africa and indicated a positive impact of sulfur on the levels of thiols...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610734/impact-of-post-harvest-ozone-treatments-on-the-skin-phenolic-extractability-of-red-winegrapes-cv-barbera-and-nebbiolo-vitis-vinifera-l
#16
Maria Alessandra Paissoni, Susana Río Segade, Simone Giacosa, Fabrizio Torchio, Francesco Cravero, Vasileios Englezos, Kalliopi Rantsiou, Cristian Carboni, Vincenzo Gerbi, Pierre-Louis Teissedre, Luca Rolle
Recently the use of ozone as sanitizing agent has been proposed on winegrapes in order to control mycobiota after harvest. The aim of this work was to investigate possible indirect physico-chemical effects of ozone treatment on berry skin phenolic composition and extractability. Vitis vinifera L. cv Nebbiolo and Barbera, chosen for their different anthocyanin profiles, were post-harvest treated for 24 and 72h with gaseous ozone (30μL/L). Skin anthocyanin and flavanol extractability was assessed during maceration (6, 24, 48, 96, 168 and 240h) using a wine-like solution...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610733/comparison-of-fortified-sfursat-and-passito-wines-produced-from-fresh-and-dehydrated-grapes-of-aromatic-black-cv-moscato-nero-vitis-vinifera-l
#17
Carolina Ossola, Simone Giacosa, Fabrizio Torchio, Susana Río Segade, Alberto Caudana, Enzo Cagnasso, Vincenzo Gerbi, Luca Rolle
Moscato nero d'Acqui is an Italian aromatic black winegrape variety characterized by a low content of anthocyanins (mostly tri-substituted), a satisfactory content of high molecular mass tannins, and a fair amount of terpenes. The grapes were subjected to a postharvest dehydration process under controlled thermohygrometric conditions (16-18°C, 55-70 RH%, 0.6m/s air speed) with the aim to produce three different special wine types (fortified, sfursat, and passito) from fresh, partially dehydrated (27°Brix), and withered (36°Brix) grapes, respectively...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610732/early-leaf-removal-applied-in-warm-climatic-conditions-impact-on-tempranillo-wine-volatiles
#18
Daniel Moreno, Esperanza Valdés, David Uriarte, Esther Gamero, Inmaculada Talaverano, Mar Vilanova
Defoliation is a cultural practice with demonstrated benefits in grape and wine quality. The objective of this study was to evaluate the effect of early leaf removal applied in warm climatic conditions on volatile composition of Tempranillo wines. During three consecutive vintages (2009-2011) wine volatile compounds (alcohols, C6-compounds, ethyl esters, acetates, volatile acids, lactones and carbonyl compounds) from defoliated and non-defoliated vines were identified and quantified by GC-MS. Early leaf removal induced the increase of the concentration of all families of volatile compound quantified with exception of lactones...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610731/moscatel-vine-shoot-extracts-as-a-grapevine-biostimulant-to-enhance-wine-quality
#19
R Sánchez-Gómez, A Zalacain, F Pardo, G L Alonso, M R Salinas
Non-aromatic vine-shoot extracts (Airén) has been recently proposed as "viticultural biostimulants" when applied to grapevine. In this paper, the application of extracts from non-toasted (MVS) and toasted (MVSToasted) vine-shoots from the well-known aromatic variety such Moscatel were applied on Airén grapevine leaves, observing an increased for grape yield and wines with a lower alcohol degree. All wines at the end of the alcoholic fermentation were characterized by their fruity and floral descriptors, especially MVS wines; and 4 months later, MSV and MVSToasted wines surprised by their higher spicy notes, which correspond with the highest OAVs values for compounds such as norisoprenoids (β-damascenone), vanillin derivatives (vanillin, acetovanillone) and volatile phenols (guaiacol, syringol), compared to control wine...
August 2017: Food Research International
https://www.readbyqxmd.com/read/28610730/elicitors-used-as-a-tool-to-increase-stilbenes-in-grapes-and-wines
#20
Rocío Gil-Muñoz, José Ignacio Fernández-Fernández, Oscar Crespo-Villegas, Teresa Garde-Cerdán
Two preharvest treatments (methyl jasmonate or cell wall yeast) of grapevines (Monastrell and Tempranillo) were applied during two vintages (2014 and 2015) to check whether these elicitors enhanced stilbene accumulation in berries at the moment of harvest and in the corresponding wines elaborated with them. The main objective was checking the effect of treatment, variety and year on stilbene composition due to the interesting health-related properties of these compounds in both grapes and wines. The results pointed to inter-varietal and inter-annual differences, and that the treatments generally enhanced the stilbene composition of grapes and, particularly, of wines...
August 2017: Food Research International
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