Research Articles (Viticulture and Oenology)
Recent Submissions
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Testing the sensitivity of potential panelists for wine taint compounds using a simplified sensory strategy
(MDPI, 2018-10-24)The odor detection threshold (ODT) of a compound is the lowest concentration at which individuals can reliably perceive a difference between a sample and its corresponding control, with 50% performance above chance. Wine ... -
Measuring thiols in single cultivar South African red wines using 4,4-dithiodipyridine (DTDP) derivatization and ultraperformance convergence chromatography-tandem mass spectrometry
(MDPI, 2018-08-30)Wine varietal thiols are important contributors to wine aroma. The chemical nature of thiols makes them difficult to measure due to low concentrations, high sensitivity to oxidation, and low ionization. Methods for the ... -
Bibliometric and social network analysis in scientific research on precision agriculture
(Indian Academy of Sciences, 2018-11-10)Precision agriculture (PA) is used to improve agricultural processes. A better understanding of PA as well as the evolution of the research status through the available literature are reported and discussed in this study. ... -
Potentially smoke tainted red wines: volatile phenols and aroma attributes
(South African Society for Enology and Viticulture, 2019)Malodourous compounds, including volatile phenols (VPs) are frequently found at concentrations below their odour thresholds in wine, and may therefore be considered to present no threat to wine quality. Most investigations ... -
The impact of different tannin to anthocyanin ratios and of oxygen on the phenolic polymerisation over time in a wine-like solution
(South African Society for Enology and Viticulture, 2019)Colour and phenolic stability during ageing are influenced by the levels of distinct classes of phenolics in young red wines. The ratios between different classes of phenolic compounds also determine the colour and phenolic ... -
RNA-seq based transcriptional analysis of Saccharomyces cerevisiae and Lachancea thermotolerans in mixed-culture fermentations under anaerobic conditions
(BMC (part of Springer Nature), 2019)Background: In wine fermentation starter cultures, the blending of non-Saccharomyces yeast with Saccharomyces cerevisiae to improve the complexity of wine has become common practice, but data regarding the impact of ... -
The transcriptional responses and metabolic consequences of acclimation to elevated light exposure in grapevine berries
(Frontiers Media, 2017)An increasing number of field studies that focus on grapevine berry development and ripening implement systems biology approaches; the results are highlighting not only the intricacies of the developmental programming/re ... -
Spectral knowledge (SK-UTALCA) : software for exploratory analysis of high-resolution spectral reflectance data on plant breeding
(Frontiers Media, 2017)This article describes public, free software that provides efficient exploratory analysis of high-resolution spectral reflectance data. Spectral reflectance data can suffer from problems such as poor signal to noise ratios ... -
detection and segmentation of vine canopy in ultra-high spatial resolution RGB imagery obtained from Unmanned Aerial Vehicle (UAV) : a case study in a commercial vineyard
(MDPI, 2017)The use of Unmanned Aerial Vehicles (UAVs) in viticulture permits the capture of aerial Red-Green-Blue (RGB) images with an ultra-high spatial resolution. Recent studies have demonstrated that RGB images can be used to ... -
Measuring thiols in single cultivar South African red wines using 4,4-dithiodipyridine (DTDP) derivatization and ultraperformance convergence chromatography-tandem mass spectrometry
(MDPI, 2018)Wine varietal thiols are important contributors to wine aroma. The chemical nature of thiols makes them difficult to measure due to low concentrations, high sensitivity to oxidation, and low ionization. Methods for the ... -
Modelling the sensory space of varietal wines : mining of large, unstructured text data and visualisation of style patterns
(Nature Publishing Group, 2018)The increasingly large volumes of publicly available sensory descriptions of wine raises the question whether this source of data can be mined to extract meaningful domain-specific information about the sensory properties ... -
The effect of grape temperature at pressing on phenolic extraction and evolution in Méthode Cap Classique wines throughout winemaking
(South African Society for Enology and Viticulture, 2018)Maintaining the chemical composition of a wine is essential for the wine industry. Although the sugar-acid balance of a wine is of primary sensory importance, individual acids and oenological parameters are equally important. ... -
Altered fermentation performances, growth, and metabolic footprints reveal competition for nutrients between yeast species inoculated in synthetic grape juice-like medium
(Frontiers Media, 2018)The sequential inoculation of non-Saccharomyces yeasts and Saccharomyces cerevisiae in grape juice is becoming an increasingly popular practice to diversify wine styles and/or to obtain more complex wines with a peculiar ... -
Effect of saccharomyces, non-saccharomyces yeasts and malolactic fermentation strategies on fermentation kinetics and flavor of Shiraz Wines
(MDPI, 2017)The use of non-Saccharomyces yeasts to improve complexity and diversify wine style is increasing; however, the interactions between non-Saccharomyces yeasts and lactic acid bacteria (LAB) have not received much attention. ... -
Saccharomyces cerevisiae, non-saccharomyces yeasts and lactic acid bacteria in sequential fermentations : effect on phenolics and sensory attributes of South African syrah wines
(South African Society for Enology and Viticulture, 2017)Wine consumers predominantly use visual, sensory and textual descriptors as quality/preference indicators to describe olfactory sensations. In this study, different wines were analysed to generate relevant chemical and ... -
Wild herbivore grazing enhances insect diversity over livestock grazing in an African grassland system
(Public Library of Science, 2016)Southern Africa’s grassland biodiversity is threatened by habitat transformation such as commercial forestry. Ecological networks (ENs) have been investigated to alleviate the pressure of habitat transformation on local ... -
Hanseniaspora uvarum from winemaking environments show spatial and temporal genetic clustering
(Frontiers Media, 2016)Hanseniaspora uvarum is one of the most abundant yeast species found on grapes and in grape must, at least before the onset of alcoholic fermentation (AF) which is usually performed by Saccharomyces species. The aim of ... -
Symptomatology and anatomy of stemgrooving (legno riccio) in the grape vine
(South African Society for Enology and Viticulture, 1980)External and anatomical differences between organs affected and unaffected by stemgrooving were studied on the wine grape cultivar Chenin blanc and the table grape cultivars Barlinka and Almeria. Cultivar susceptibility, ... -
The effect of selected minimum and conventional tillage practices in vineyard cultivation on vine performance
(South African Society for Enology and Viticulture, 1980)A long-term vineyard cultivation experiment, comprising six tillage treatments which represent a "conventional'' cultivation group as well as a group of "minimum" tillage practices, was started in 1968 at Nietvoorbij ... -
Effect of growth arrestment disease on the anatomy and ultrastructure of vitis vinifera L. var. sultana
(South African Society for Enology and Viticulture, 1981)The anatomical and ultrastructural changes caused by the so called Growth Arrestment Disease (G.A.D.) in Vitis vinifera L. var. sultana were investigated by means of scanning and transmitted electron microscopy as well as ...
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