Search results for "wine"

Comparing analytical methods to detect SARS-CoV-2 in wastewater

2021

Wastewater based epidemiology (WBE) has emerged as a reliable strategy to assess the coronavirus disease 2019 (COVID-19) pandemic. Recent publications suggest that SARS-CoV-2 detection in wastewater is technically feasible; however, many different protocols are available and most of the methods applied have not been properly validated. To this end, different procedures to concentrate and extract inactivated SARS-CoV-2 and surrogates were initially evaluated. Urban wastewater seeded with gamma-irradiated SARS-CoV-2, porcine epidemic diarrhea virus (PEDV), and mengovirus (MgV) was used to test the concentration efficiency of an aluminum-based adsorption-precipitation method and a polyethylene…

Biogas production from boreal herbaceous grasses – Specific methane yield and methane yield per hectare

2009

Abstract The objective of this study was to determine the specific methane yields of four grass species (cocksfoot, tall fescue, reed canary grass and timothy) cultivated under boreal conditions as well as how harvesting time and year of cultivation affects the specific methane yields per ha. The specific methane yields of all grasses and all harvests varied from 253 to 394 Nl CH4/kg volatile solids (VS) added. The average specific methane yield of the 1st harvest of all grasses was higher than the 2nd harvests. In this study the methane and energy yields from different harvest years were ranged from 1200 to 3600 Nm3 CH4/ha/a, corresponding from 12 to 36 MWh CH 4 /ha/a. The methane yield pe…

Adoption of practices of environmental sustainability in viticulture: first suggestions from Canton of Ticino

2018

The paper investigates the practices of environmental sustainability implemented in viticulture to minimize the negative impact of agricultural operations on the environment. Through the use of an electronic questionnaire, developed on a theoretical approach based on the Stakeholders Theory and the Theory of Planned Behaviour, and sent to a sample of wineries of the Canton of Ticino, the research pursues a triple aim: (i) to understand which are the main practices and initiatives of environmental sustainability adopted at firm level; (ii) to identify the main stakeholders that affect the choices of managers and owners to orient the firms towards the adoption of practices aimed at greater en…

Influence of indigenous Hanseniaspora uvarum and Saccharomyces cerevisiae from sugar-rich substrates on the aromatic composition of loquat beer

2022

The demand for unique and exclusive food products and beverages is constantly on the increase. One of the products that mostly evolved to encounter market dynamics in the last decade is craft beer. For a long time, craft breweries have included fruit in beer production to enrich flavour and aroma profile of different beer styles. In this study, for the first time, the use of Saccharomyces and non-Saccharomyces yeast strains isolated from high -sugar matrices (manna and fermented honey by-products) were investigated to diversify fruit craft beer pro-duction, in order to improve the fermentation process and highlight the complexity of aroma profiles generated during alcoholic fermentation. Tw…

Eupelmus spermophilus Silvestri (Hymenoptera: Chalcidoidea), an Indigenous Olive Seed Wasp Potentially Harmful to Olive Growing in the Western Cape, …

2021

The objectives of this study were the specific taxonomic confirmation of the main olive seed wasp (OSW) attacking commercial olives in the Western Cape, to investigate monitoring methods and seasonal occurrence of OSW, to determine the potential economic damage of infestations, and to ascertain the geographic distribution of OSW in the regions where olives are cultivated in the Western Cape. Morphological and molecular methods were used to identify all the species obtained from cultivated olives at two trial sites near Stellenbosch and Agter-Paarl. Eupelmus spermophilus Silvestri (Hymenoptera: Chalcidoidea) was by far the most frequent and widespread olive seed wasp. Monitoring with yellow …

Reconstruction of the evolutionary history of Saccharomyces cerevisiae x S. kudriavzevii hybrids based on multilocus sequence analysis.

2012

In recent years, interspecific hybridization and introgression are increasingly recognized as significant events in the evolution of Saccharomyces yeasts. These mechanisms have probably been involved in the origin of novel yeast genotypes and phenotypes, which in due course were to colonize and predominate in the new fermentative environments created by human manipulation. The particular conditions in which hybrids arose are still unknown, as well as the number of possible hybridization events that generated the whole set of natural hybrids described in the literature during recent years. In this study, we could infer at least six different hybridization events that originated a set of 26 S…

Effect of red wine soaking on the microbiological profile, total phenolic content and sensory aspects of an ovine pressed cheese

2022

The aim of this study was to produce an ovine pressed cheese with high polyphenol content. To this purpose, fresh Primosale Pecorino cheese was soaked for seven days in Nero d’Avola wine (NDW) and was indicated as experimental cheese production (EP). The final cheese was characterized for its microbiological, chemical and sensory characteristics. Specifically, cheese making was performed with pasteurized ewes’ milk and a commercial starter culture. Control cheese production (CP) did not include the soaking phase in NDW. Plate counts confirmed the dominance of the commercial starter until 109 CFU/g in both CP and EP cheeses. The soaking in NDW increased cheese total phenolic compounds (TPC) …

Fluorescence fingerprinting of bottled white wines can reveal memories related to sulfur dioxide treatments of the must.

2015

For the first time, Excitation Emission Matrix (EEM) fluorescence spectroscopy was combined with parallel factor statistical analysis (PARAFAC) and applied to a set of 320 dry white wines of the Chardonnay grape variety. A four component PARAFAC model (C1, C2, C3 and C4) best explained the variability of fluorescence signatures of white wines. Subtle changes were observed in EEMs of white wines from two different vintages (2006 and 2007), where different concentrations of sulfur dioxide (0, 4, and 8 g·hL(-1)) were added to the grape must at pressing. PARAFAC results clearly indicated that sulfur dioxide added to the must subsequently influenced white wine chemistry into three distinct sulfu…

The Administration of Exogenous Surfactant during Cold Preservation Can Improve Pulmonary Function after Lung Transplantation in a Swine Model of Pro…

2012

Word Embeddings for Wine Recommender Systems Using Vocabularies of Experts and Consumers

2018

International audience; This vision paper proposes an approach to use the most advanced word embeddings techniques to bridge the gap between the discourses of experts and non-experts and more specifically the terminologies used by the two communities. Word embeddings makes it possible to find equivalent terms between experts and non-experts, by approach the similarity between words or by revealing hidden semantic relations. Thus, these controlled vocabularies with these new semantic enrichments are exploited in a hybrid recommendation system incorporating content-based ontology and keyword-based ontology to obtain relevant wines recommendations regardless of the level of expertise of the en…