Research Articles (Viticulture and Oenology)
Recent Submissions
-
Thermal imaging reliability for estimating grain yield and carbon isotope discrimination in wheat genotypes : importance of the environmental conditions
(MDPI, 2019-06-13)Canopy temperature (Tc) by thermal imaging is a useful tool to study plant water status and estimate other crop traits. This work seeks to estimate grain yield (GY) and carbon discrimination (Δ13C) from stress degree day ... -
Basic in-mouth attribute evaluation : a comparison of two panels
(MDPI, 2018-12-21)Astringency is often difficult to evaluate accurately in wine because of its complexity. This accuracy can improve through training sessions, but it can be time-consuming and expensive. A way to reduce these costs can be ... -
Measuring internal maturity parameters contactless on intact table grape bunches using NIR spectroscopy
(Frontiers Media, 2019)The determination of internal maturity parameters of table grape is usually done destructively using manual methods that are time-consuming. The possibility was investigated to determine whether key fruit attributes, namely, ... -
Metabolomic profiling of the desiccation-tolerant medicinal shrub myrothamnus flabellifolia indicates phenolic variability across its natural habitat : implications for tea and cosmetics production
(MDPI, 2019-03-29)The leaves and twigs of the desiccation-tolerant medicinal shrub Myrothamnus flabellifolia are harvested for use in traditional and commercial teas and cosmetics due to their phenolic properties. The antioxidant and ... -
Spectral reflectance modeling by wavelength Selection : studying the scope for blueberry physiological breeding under contrasting water supply and heat conditions
(MDPI, 2019)To overcome the environmental changes occurring now and predicted for the future, it is essential that fruit breeders develop cultivars with better physiological performance. During the last few decades, high-throughput ... -
Unravelling the complexities of wine : a big data approach to yeast assimilable nitrogen using InfraRed spectroscopy and chemometrics
(International Viticulture and Enology Society, 2019-04-26)Aim: Assimilable Nitrogen (YAN) has been identified as one of the main drivers of wine quality, influencing the production of various aromas and ensuring a successful fermentation to dryness. Due to the number of ... -
Optimised extraction and preliminary characterisation of mannoproteins from non-saccharomyceswine yeasts
(MDPI, 2021-04-22)The exogenous application of yeast-derived mannoproteins presents many opportunities for the improvement of wine technological and oenological properties. Their isolation from the cell wall of Saccharomycescerevisiae has ... -
Effect of the illumination angle on NDVI data composed of mixed surface values obtained over vertical‐shoot‐positioned vineyards
(MDPI, 2021-02-25)Accurate quantification of the spatial variation of canopy size is crucial for vineyard management in the context of Precision Viticulture. Biophysical parameters associated with canopy size, such as Leaf Area Index (LAI), ... -
The 3Ps (Profit, Planet, and People) of sustainability amidst climate change : a South African grape and wine perspective
(MDPI, 2021-03-08)Conventional agriculture has made the search for sustainability urgent, more so with regards to climate change. This has extended to the grape and wine industry, an important industry in South Africa in terms of labor ... -
Grape must profiling and cultivar discrimination based on amino acid composition and general discriminant analysis with best subset
(South African Society for Enology and Viticulture, 2019)The present study aimed to elucidate the amino acid profile of a number of grapevine cultivars relevant to the South African wine industry using 738 grape must samples obtained during the 2016 and 2017 harvests. Proline ... -
Impact of time, oxygen and different anthocyanin to tannin ratios on the precipitate and extract composition using liquid chromatography-high resolution mass spectrometry
(South African Society for Enology and Viticulture, 2019)Wine colour and phenolic stability over time are influenced by the amount and nature of phenolics in young wines. The ratio between different phenolic compounds can also be determinant in the colour and phenolic development ... -
Research note : effect of light quality on fruit growth, composition and the sensory impact of the wines
(South African Society for Enology and Viticulture, 2019)The stage at which grapes are harvested has an influence on the aromatic and phenolic composition of the berries and the resulting wines. The aim of this study was to evaluate wines harvested sequentially as outlined in ... -
Effects of abiotic factors on phenolic compounds in the grape berry – a review
(South African Society for Enology and Viticulture, 2019)Grape berry phenolic compounds are widely described in literature. Phenolics can be divided into two main groups: flavonoids and non-flavonoids, of which the flavonoids are the most important. The two bestknown groups of ... -
Profiling 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 ... -
Nitrogen and Sulphur Foliar Fertilisation
(South African Society for Enology and Viticulture, 2019)The effects of fertilisation can reverberate from grapes through to wines. In wine, non-volatile compounds mainly influence the taste and flavour of wines, while volatile compounds play an important role in the aromatic ... -
The use of SO2 to bind acetaldehyde in wine : sensory implications
(South African Society for Enology and Viticulture, 2018)It is thought that the formation of hydroxysulphonate when sulphur dioxide is added to wine containing free acetaldehyde negates the sensory impact of the latter compound, but little research has been done on this. ... -
A review of leaf-mining insects and control options for their management, with special reference to holocacista capensis (lepidoptera: heliozelidae) in vineyards in South Africa
(South African Society for Enology and Viticulture, 2020)A leaf-mining pest occurring on commercial varieties of Vitis vinifera in South Africa was investigated due to the presence of cocoons on fruit. The leaf miner, Holocacista capensis, was reported on grapevines in 2012. ... -
Pinking in white wines - a review
(South African Society for Enology and Viticulture, 2020)In the late 1960s, a phenomenon was discovered in white wines. It was noted that certain white wines turned pink in the bottle. This phenomenon was dubbed as pinking. Research was done on the pinking to establish its cause ... -
Evaluation of South African chenin blanc wines made from six different trellising systems using a chemical and sensorial approach
(South African Society for Enology and Viticulture, 2020)There are many ways of manipulating the components of grape berries and one of these is the implementation of a specific trellising system. This will affect light exposure in the bunch zone, air flow through the canopy, crop ... -
Evolution of phenolic composition during barrel and bottle aging
(South African Society for Enology and Viticulture, 2020)During red wine ageing, phenolic compounds undergo several reactions that have an impact on wine colour and mouthfeel properties. The evolution of phenolic content is affected during wine ageing. The aim of this study was ...
RSS 1.0