terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Preliminary study of extraction of polysaccharides from pomace by high powered ultrasonic combined with enzymes

Preliminary study of extraction of polysaccharides from pomace by high powered ultrasonic combined with enzymes

Abstract

Red grape pomace can be an important source of polysaccharides, but currently they are little studied and even less with viable and environmental extraction processes (green extraction). These green techniques must be able to break the cell wall so that the compounds contained in the cells, including polysaccharides, are released and can have a great influence on extraction yields, the chemical structure of polysaccharides and applications in wines. Amongst the emerging green techniques most applied to the extraction of bioactive compounds, such as polysaccharides, high-power ultrasound (US) and enzyme-assisted extraction stand out. High power ultrasonic assisted extraction is based on the application of mechanical sound waves with frequencies between 20 kHz and 100 kHz inducing acoustic cavitation in a liquid medium, which causes fragmentation and formation of pores in the cells of the cell wall, and leads to increased extraction and diffusion of polysaccharides. While the use of enzymes causes the rupture of the cell walls, hydrolyzing them under optimal experimental conditions and releasing polysaccharides at lower temperatures, avoiding possible changes in the structure and bioactivity of the polysaccharides. Extraction combined with both techniques can increase the extraction yield of polysaccharides and/or reduce the extraction time. In this work, the variables of extractant liquid pH at three levels, US application time at three levels and application of enzymes before or after the US treatment on the polysaccharide extraction yield were studied. All the tests were carried out at 30 kHz, a red pomace/liquid ratio of 1.3 and with a dose of 0.6 ml/Hl of enzymes. In addition, the distribution of the molecular weights of the extracts obtained in the different tests was determined.

Acknowledgments: This research was funded by the Ministry of Science, Innovation and Universities from the Spanish Government and Feder Funds, grant number PID2021-123361OR-C22.

DOI:

Publication date: October 13, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Ekhiñe Garaigordobil1, Samuel Mateo Rogríguez1, Diego Canalejo1, Zhao Feng1, Mikel Landín Ross-Magahy1, Leticia Martínez-Lapuente1, Zenaida Guadalupe1, Silvia Pérez Magariño2, Belén Ayestarán1

1Instituto de Ciencias de la Vid y el Vino (Universidad de La Rioja, Gobierno de La Rioja, CSIC), Spain
2Instituto Tecnológico Agrario de Castilla y León (ITACyL), Spain

Contact the author*

Keywords

pomace, polysaccharides, ultrasound, enzymes, extraction yield

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Accumulation of deleterious mutations in grapevine and its relationship with traits of interest for wine production and resilience

Deleterious mutations that severely reduce population fitness are rapidly removed from the gene pool by purifying selection. However, evolutionary drivers such as genetic drift brought about by demographic bottlenecks may comprise its efficacy by allowing deleterious mutations to accumulate, thereby limiting the adaptive potential of populations. Moreover, positive selection can hitchhike mildly deleterious mutations due to linkage caused by lack of recombination. Similarly, in the context of species domestication, artificial selection mimics these evolutionary processes, which can have undesirable consequences for production and resilience. In this study, we evaluated the extent of the accumulation of deleterious mutations and the magnitude of their effects (also known as genetic load) at the whole-genome scale for ca.

Effect of different plant fibers on the elimination of undesirable compounds in red wine. Correlation with its polysaccharide composition

The presence of undesirable compounds in wines, such as OTA, biogenic amines and pesticides residues, affects wine quality and can cause health problems for the consumer. The main tool that a winemaker has to reduce their content in the wine is fining. However, some of the fining agents commonly used in the winery can cause allergies or even increase the protein content in the wine, increasing the turbidity. To avoid these problems, the use of plant fibers may be an alternative, such as those from grape pomace[1] or other plant origins.

Uncovering the interplay between Copper and SO2 tolerance in Saccharomyces cerevisiae

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.20.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...

Reduction of the height of the canopy in fruit set and in pea size: vegetative, productive and maturation effects, in cv. Verdejo

Global warming is accelerating the technological ripening of the grape, with a loss of acidity, which requires that vineyard management can delay ripening to avoid it. The source-sink relation is essential for grape ripening, since it affects the distribution of photosynthates and substances derived from plant metabolism. A work is proposed to know the response of the vineyard to the drastic reduction of the foliar surface by trim down the shoots in cv.

Evaluation of the effects of pruning methodology on the development of young vines 

Grapevine pruning is one of the most important practices in the vineyards. Winegrowers use it to provide the vines the shape needed, or to maintain it once achieved, and also to balance vegetative growth and fruit production. In the last decades, careless pruning has been blamed, among other factors, as responsible of the vineyard decay that is been observed even in young vines. However, to our knowledge, there is a lack of systematic research trying to elucidate to which extent the pruning method used affects plant development or its susceptibility to grapevine trunk diseases (GTD). Within this context, the aim of this work is to study the influence of different pruning method strategies on the development of field-planted young vines.