Search results for " uva"
showing 10 items of 28 documents
Interspecific hybridisation among diverse Saccharomyces species: A combined biotechnological solution for low-temperature and nitrogen-limited wine f…
2019
Lack of the prezygotic barrier in the Saccharomyces genus facilitates the construction of artificial interspecific hybrids among different Saccharomyces species. Hybrids that maintain the interesting features of parental strains have been applied in industry for many beneficial purposes. Two of the most important problems faced by wine makers is nitrogen deficiency in grape must and low-temperature fermentation. In our study, hybrids were constructed by using selected low nitrogen-demanding cryotolerant S. eubayanus, S. uvarum strains and S. cerevisiae. The fermentation capacity of the hybrid strains was tested under four conditions by combining two temperatures, 12 °C and 28 °C, and two ni…
LA COLTIVAZIONE DELL'UVA DA TAVOLA IN SERRA SOTTO FOTOVOLTAICO
La gestione del vigneto siciliano per la produzione di uva di qualità e la riduzione dei costi.
2009
Il livello qualitativo dell’uva è di fondamentale importanza per l’ottenimento di un prodotto enologico di qualità. La produttività della vite, sia in termini qualitativi che quantitativi, è determinata dall’interazione tra il genotipo, l’ambiente e le tecniche colturali Sin dall’impianto, il viticoltore dovrebbe essere impegnato ad effettuare scelte colturali finalizzate a ridurre la variabilità tra le piante. La gestione del sistema vigneto deve essere indirizzata alla riduzione dei costi di produzione ed al miglioramento della qualità. In tal senso, il cambiamento che sta subendo l’impostazione e la gestione della spalliera in Sicilia è un aspetto positivo. Attraverso le diverse tecniche…
Il comparto delle uve da vino e quello delle uva da tavola. evoluzione e innovazione per prodotti di qualità.
2007
Effetti del microclima sulla componente aromatica di uve della cv Grillo
2014
Applicazione di tecniche non distruttive per la valutazione delle proprietà fisico-meccaniche dei frutti
Evoluzione dei composti fenolici nelle uve di Nero d’Avola, Merlot e Cabernet sauvignon durante la maturazione nell’ambiente della Sicilia occidentale
2011
Data from: Population structure and reticulate evolution of Saccharomyces eubayanus and its lager-brewing hybrids
2014
Reticulate evolution can be a major driver of diversification into new niches, especially in disturbed habitats and at the edges of ranges. Industrial fermentation strains of yeast provide a window into these processes, but progress has been hampered by a limited understanding of the natural diversity and distribution of Saccharomyces species and populations. For example, lager beer is brewed with Saccharomyces pastorianus, an alloploid hybrid of S. cerevisiae and S. eubayanus, a species only recently discovered in Patagonia, Argentina. Here we report that genetically diverse strains of S. eubayanus are readily isolated from Patagonia, demonstrating that the species is well established ther…
Killer toxins in new isolates of the yeasts Hanseniaspora uvarum and Pichia kluyveri
1985
From various habitats (plant material, fruits, soil), yeasts belonging to the species of Pichia kluyveri and Hanseniaspora uvarum were isolated that showed killer activity. According to the activity spectrum against other yeasts these strains belonged to 11 different groups that were distinguishable from the killer strains K1-K10. The isoelectric points of the killer proteins were in the range of pH 3.5–3.9, the activity optimum was observed at pH 4.2–4.6. Above pH 5 and above a temperature of 25–35°C the killer proteins were inactivated.
Non-conventional yeasts from fermented honey by-products: Focus on Hanseniaspora uvarum strains for craft beer production
2021
The increasing interest in novel beer productions focused on non-Saccharomyces yeasts in order to pursue their potential in generating groundbreaking sensory profiles. Traditional fermented beverages represent an important source of yeast strains which could express interesting features during brewing. A total of 404 yeasts were isolated from fermented honey by-products and identified as Saccharomyces cerevisiae, Wickerhamomyces anomalus, Zygosaccharomyces bailii, Zygosaccharomyces rouxii and Hanseniaspora uvarum. Five H. uvarum strains were screened for their brewing capability. Interestingly, Hanseniaspora uvarum strains showed growth in presence of ethanol and hop and a more rapid growth…