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Vinification

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https://www.readbyqxmd.com/read/29660721/changes-in-soil-water-availability-in-vineyards-can-be-traced-by-the-carbon-and-nitrogen-isotope-composition-of-dried-wines
#1
Jorge E Spangenberg, Vivian Zufferey
The grapevine is one of the most important edible fruit plants cultivated worldwide, and it is highly sensitive to changes in the soil water content. We studied the total carbon and nitrogen contents and stable isotope compositions (C/NWSR , δ13 CWSR and δ15 NWSR values) of the solid residues obtained by freeze-drying wines produced from two white grapevine cultivars (Vitis vinifera L. cv Chasselas and Petite Arvine) field grown under different soil water regimes while maintaining other climatic and ecopedological conditions identical...
September 1, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29600246/evolution-of-sangiovese-wines-with-varied-tannin-and-anthocyanin-ratios-during-oxidative-aging
#2
Angelita Gambuti, Luigi Picariello, Alessandra Rinaldi, Luigi Moio
Changes in phenolic compounds, chromatic characteristics, acetaldehyde, and protein-reactive tannins associated with oxidative aging were studied in Sangiovese wines with varied tannin T/anthocyanin A ratios. For this purpose, three Sangiovese vineyards located in Tuscany were considered in the 2016 vintage. To obtain wines with different T/A ratios, two red wines were produced from each vinification batch: a free run juice with a lower T/A ratio and a marc pressed wine with a higher T/A ratio. An overall of six wines with T/A ratios ranging between 5 and 23 were produced...
2018: Frontiers in Chemistry
https://www.readbyqxmd.com/read/29587406/characterization-of-phenolic-compounds-in-wine-lees
#3
Ye Zhijing, Amin Shavandi, Roland Harrison, Alaa El-Din A Bekhit
The effect of vinification techniques on phenolic compounds and antioxidant activity of wine lees are poorly understood. The present study investigated the antioxidant activity of white and red wine lees generated at early fermentation and during aging. In this study, the total phenol content (TPC), total tannin content (TTC), mean degree of polymerization (mDP), and antioxidant activities of five white and eight red wine lees samples from different vinification backgrounds were determined. The results showed that vinification techniques had a significant ( p < 0...
March 25, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29369355/recent-advances-in-postharvest-technology-of-the-wine-grape-to-improve-the-wine-aroma
#4
REVIEW
Fabio Mencarelli, Andrea Bellincontro
BACKGROUND: Postharvest techniques are widely used for the handling and storage of fresh horticultural crops. Some of these crops are interesting for use with wine grapes to improve the quality of wine. In this review, we consider the postharvest techniques that are already commercially used in wine sector and others that may be significant in inducing or extracting the aroma from grapes to produce high-quality wines. RESULTS: Precooling consists of rapidly lowering the grape temperature, which allows the preservation/increase of volatile organic compounds (VOCs)...
January 25, 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/29037742/augmentation-of-chemical-and-organoleptic-properties-in-syzygium-cumini-wine-by-incorporation-of-grape-seeds-during-vinification
#5
K S VenuGopal, Chris Cherita, K A Anu-Appaiah
The role of grape seed tannins on improving organoleptic properties and its involvement in color stabilization in red wine are well established. The addition of grape seeds as the source of condensed tannins in fruit wine may provide a solution for its color instability and improvement of sensory attributes. Syzgium cumini is traditionally known for its therapeutic properties. In the current study, the influence of yeasts and grape seed addition during fermentation on the chromatic, phenolic and sensory attributes of the wine was accessed...
March 1, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28892512/grape-microbiome-as-a-reliable-and-persistent-signature-of-field-origin-and-environmental-conditions-in-cannonau-wine-production
#6
Valerio Mezzasalma, Anna Sandionigi, Ilaria Bruni, Antonia Bruno, Gianni Lovicu, Maurizio Casiraghi, Massimo Labra
Grape berries harbor a wide range of microbes originating from the vineyard environment, many of which are recognized for their role in the must fermentation process shaping wine quality. To better clarify the contribution of the microbiome of grape fruits during wine fermentation, we used high-throughput sequencing to identify bacterial and fungi communities associated with berries and musts of Cannonau. This is the most important cultivar-wine of Sardinia (Italy) where most vineyards are cultivated without phytochemical treatments...
2017: PloS One
https://www.readbyqxmd.com/read/28888733/exposure-risk-assessment-to-ochratoxin-a-through-consumption-of-juice-and-wine-considering-the-effect-of-steam-extraction-time-and-vinification-stages
#7
Bruna Dachery, Flávio Fonseca Veras, Lucas Dal Magro, Vitor Manfroi, Juliane Elisa Welke
The goals of this study were (i) to verify the effect of steam extraction used in juice production and the stages of vinification on the ochratoxin A (OTA) levels found in grapes naturally contaminated, and (ii) evaluate the risk of exposure to this toxin when the daily consumption of juice and wine is followed to prevent cardiovascular disease. OTA-producing fungi were isolated from Cabernet Sauvignon, Moscato Itálico and Concord grapes harvested from the same vineyard and intended to produce red wine, white wine and juice, respectively...
November 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28769887/sequential-inoculation-of-native-non-saccharomyces-and-saccharomyces-cerevisiae-strains-for-wine-making
#8
Beatriz Padilla, Laura Zulian, Àngela Ferreres, Rosa Pastor, Braulio Esteve-Zarzoso, Gemma Beltran, Albert Mas
The use of non-Saccharomyces yeast for wine making is becoming a common trend in many innovative wineries. The application is normally aimed at increasing aromas, glycerol, reducing acidity, and other improvements. This manuscript focuses on the reproduction of the native microbiota from the vineyard in the inoculum. Thus, native selected yeasts (Hanseniaspora uvarum, Metschnikowia pulcherrima, Torulaspora delbrueckii, Starmerella bacillaris species and three different strains of Saccharomyces cerevisiae) were inoculated sequentially, or only S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28764054/seed-incorporation-during-vinification-and-its-impact-on-chemical-and-organoleptic-properties-in-syzygium-cumini-wine
#9
K S VenuGopal, K A Anu-Appaiah
Syzgium cumini (Jamun) is an evergreen tropical tree, its various parts are known for many therapeutic properties. The present work represents the production of wines from jamun fruits using two different native isolates (Saccharomyces cerevisiae - KF551990 and Pichia gummiguttae - MCC 1273) and influence of jamun seeds on the physico-chemical parameters, chromatic properties, phenolic components and sensory attributes of wine. Wine produced was bottle aged for one year. On aging there was a reduction in bitterness and astringency...
December 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28754099/antioxidant-and-vasorelaxant-activities-induced-by-northeastern-brazilian-fermented-grape-skins
#10
José George F Albuquerque, Valéria L Assis, Arthur J P O Almeida, Ionaldo J L D Basílio, Melissa N Luciano, Bruno R L A Meireles, Ângela M T M Cordeiro, Islânia G A Araújo, Robson C Veras, Thaís P Ribeiro, Isac A Medeiros
BACKGROUND: In northeastern Brazil, grape pomace has become a potential alternative byproduct because of the recover phenolic compounds from the vinification process. Comparative analyses were performed between lyophilized extract of grape skins from pomace, described as fermented (FGS), and fresh, unfermented (UGS) grape skins to show the relevant brand's composition upon the first maceration in winemaking. METHODS: The use of in vitro testing such as Folin-Ciocalteu's, DPPH free radical scavenger and HPLC methods were performed to evidence antioxidant effect and phenolic compounds...
July 28, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28734048/non-anthocyanin-polyphenolic-transformation-by-native-yeast-and-bacteria-co-inoculation-strategy-during-vinification
#11
Apramita Devi, Kodira Muthanna Archana, Panikuttria Kuttappa Bhavya, Konerira Aiyappaa Anu-Appaiah
BACKGROUND: Co-inoculation has been adapted by many wine-producing countries because it enhances the success of malolactic fermentation and reduces the fermentation cost, as well as time. However, wine phenolics have been sparsely highlighted during co-inoculation, even though polyphenols are an important parameter affecting wine colour, astringency and aroma. In the present study, we investigated the impact of co-inoculation on non-anthocyanin polyphenol profile for two different grape varieties...
February 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28656763/glucosylation-of-smoke-derived-volatiles-in-grapevine-vitis-vinifera-is-catalyzed-by-a-promiscuous-resveratrol-guaiacol-glucosyltransferase
#12
Katja Härtl, Fong-Chin Huang, Ashok P Giri, Katrin Franz-Oberdorf, Johanna Frotscher, Yang Shao, Thomas Hoffmann, Wilfried Schwab
Vinification of grapes (Vitis vinifera) exposed to forest fire smoke can yield unpalatable wine due to the presence of taint compounds from smoke and the release of smoke derived volatiles from their respective glycosides during the fermentation process or in-mouth during consumption. To identify glycosyltransferases (GTs) involved in the formation of glycosidically bound smoke-derived volatiles we performed gene expression analysis of candidate GTs in different grapevine tissues. Second, substrates derived from bushfire smoke or naturally occurring in grapes were screened with the candidate recombinant GTs...
July 19, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28585252/polysaccharides-oligosaccharides-and-nitrogenous-compounds-change-during-the-ageing-of-tempranillo-and-verdejo-sparkling-wines
#13
COMPARATIVE STUDY
Leticia Martínez-Lapuente, Rafael Apolinar-Valiente, Zenaida Guadalupe, Belén Ayestarán, Silvia Pérez-Magariño, Pascale Williams, Thierry Doco
BACKGROUND: Verdejo and Tempranillo are traditional varieties for producing still wines; however, they could provide an alternative for the manufacturing of sparkling wines. Sparkling wines were elaborated by the traditional method, followed by ageing on lees for 9 months. A study on the changes that take place in polysaccharides, oligosaccharides and nitrogenous compounds during the ageing on lees of Tempranillo and Verdejo sparkling wines has been undertaken. RESULTS: Mannoproteins and the glucose residue of oligosaccharides were the major carbohydrates detected in all vinification stages...
January 2018: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28471493/effects-of-vinification-techniques-combined-with-uv-c-irradiation-on-phenolic-contents-of-red-wines
#14
Hande Tahmaz, Gökhan Söylemezoğlu
Red wines are typically high in phenolic and antioxidant capacity and both of which can be increased by vinification techniques. This study employed 3 vinification techniques to assess the increase in phenolic compounds and antioxidant capacity. Wines were obtained from Boğazkere grape cultivar by techniques of classical maceration, cold maceration combined with ultraviolet light (UV) irradiation, and thermovinification combined with UV irradiation and changes in phenolic contents were examined. Total phenolic and anthocyanin contents and trolox equivalent antioxidant capacity of wines were measured spectrophotometrically and phenolic contents (+)-catechin, (-)-epicatechin, rutin, quercetin, trans-resveratrol, and cis-resveratrol were measured by High Pressure Liquid Chromatography with Diode Array Detection (HPLC-DAD)...
June 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28324615/construction-of-low-ethanol-wine-yeasts-through-partial-deletion-of-the-saccharomyces-cerevisiae-pdc2-gene
#15
Raúl Andrés Cuello, Karina Johana Flores Montero, Laura Analía Mercado, Mariana Combina, Iván Francisco Ciklic
We propose an alternative GMO based strategy to obtain Saccharomyces cerevisiae mutant strains with a slight reduction in their ability to produce ethanol, but with a moderate impact on the yeast metabolism. Through homologous recombination, two truncated Pdc2p proteins Pdc2pΔ344 and Pdc2pΔ519 were obtained and transformed into haploid and diploid lab yeast strains. In the pdc2Δ344 mutants the DNA-binding and transactivation site of the protein remain intact, whereas in pdc2Δ519 only the DNA-binding site is conserved...
December 2017: AMB Express
https://www.readbyqxmd.com/read/28239292/assessing-the-efficacy-of-pef-treatments-for-improving-polyphenol-extraction-during-red-wine-vinifications
#16
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/28165846/further-highlighting-on-the-prevention-of-oxidative-damage-by-polyphenol-rich-wine-extracts
#17
Sara Salucci, Sabrina Burattini, Francesco Maria Giordano, Simone Lucarini, Giuseppe Diamantini, Elisabetta Falcieri
Wine contains various polyphenols such as flavonoids, anthocyanins, and tannins. These molecules are responsible for the quality of wines, influencing their astringency, bitterness, and color and they are considered to have antioxidant activity. Polyphenols, extracted from grapes during the processes of vinification, could protect the body cells against reactive oxygen species level increase and could be useful to rescue several pathologies where oxidative stress represents the main cause. For that, in this study, red and white wine, provided by an Italian vinery (Marche region), have been analyzed...
April 2017: Journal of Medicinal Food
https://www.readbyqxmd.com/read/27845756/the-use-of-grape-seed-byproducts-rich-in-flavonoids-to-improve-the-antioxidant-potential-of-red-wines
#18
María José Jara-Palacios, Dolores Hernanz, María Luisa Escudero-Gilete, Francisco J Heredia
The influence of adding seeds from grape pomace during Syrah wine fermentation in a warm climate has been studied. Seeds of Pedro Ximenez variety were rich in phenolic compounds, mainly flavonoids such as catechin and procyanidins. Changes in total phenolic content (TPC), total flavonoid content (TFC), and antioxidant activity of red wines were observed. These changes depended on the vinification stage and the amount of seeds (SW: 450 g or DW: 900 g seeds/150 kg grapes) applied. In general, antioxidant activity was greater when a simple dose (SW) was considered...
November 12, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/27783969/pineapple-ananas-comosus-l-merr-wine-production-in-angola-characterisation-of-volatile-aroma-compounds-and-yeast-native-flora
#19
Eduardo Dellacassa, Oriol Trenchs, Laura Fariña, Florencia Debernardis, Gabriel Perez, Eduardo Boido, Francisco Carrau
A pineapple vinification process was conducted through inoculated and spontaneous fermentation to develop a process suitable for a quality beverage during two successive vintages in Huambo, Angola. Wines obtained with the conventional Saccharomyces cerevisiae strain, were analysed by gas chromatography, and a total of 61 volatile constituents were detected in the volatile fraction and 18 as glycosidically bound aroma compounds. Concentration levels of carbonyl and sulphur compounds were in agreement with the limited information reported about pineapple fruits of other regions...
January 16, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/27664648/spectroscopy-reveals-that-ethyl-esters-interact-with-proteins-in-wine
#20
Mattia Di Gaspero, Paolo Ruzza, Rohanah Hussain, Simone Vincenzi, Barbara Biondi, Diana Gazzola, Giuliano Siligardi, Andrea Curioni
Impairment of wine aroma after vinification is frequently associated to bentonite treatments and this can be the result of protein removal, as recently demonstrated for ethyl esters. To evaluate the existence of an interaction between wine proteins and ethyl esters, the effects induced by these fermentative aroma compounds on the secondary structure and stability of VVTL1, a Thaumatin-like protein purified from wine, was analyzed by Synchrotron Radiation Circular Dichroism (SRCD) spectroscopy. The secondary structure of wine VVTL1 was not strongly affected by the presence of selected ethyl esters...
February 15, 2017: Food Chemistry
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