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Book
Wine Sensory Faults : Origin, Prevention and Removal
Authors: --- ---
Year: 2022 Publisher: Basel MDPI Books

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Abstract

Wine is highly appreciated for its distinctive sensory characteristics, including its colour, aroma, and taste. However, unwanted microbiological activity, unbalanced concentrations of certain compounds resulting from unbalanced grape chemical compositions, and inadequate winemaking practices and storage conditions can result in sensory defects that significantly decrease wine quality. Although preventing wine defects is the best strategy, they are sometimes difficult to avoid. Therefore, when present, several fining agents or additives and technologies are available or being developed with different performances regarding their impact on wine quality. Wine stabilisation refers to removal and prevention strategies and treatments that limit visual, olfactory, gustatory, or tactile wine defects, as well as increase wine safety and stability through fining and the application of different operations carried out in wineries (filtration, pasteurisation, electrodialysis, and cold stabilisation) and the use of emerging technologies (electron-beam irradiation, high hydrostatic pressure, pulsed electric fields, ultrasound, pulsed light). Future trends in this field involve using more sustainable and environmentally friendly fining agents and technologies and developing treatments with better performance and specificity.


Book
Catalysts and Processes for H2S Conversion to Sulfur
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Year: 2022 Publisher: Basel MDPI - Multidisciplinary Digital Publishing Institute

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Today, more stringent regulations on SOx emissions and growing environmental concerns have led to considerable attention on sulfur recovery from hydrogen sulfide (H2S). Hydrogen sulfide is commonly found in raw natural gas and biogas, even if a great amount is obtained through sweetening of sour natural gas and hydrodesulphurization of light hydrocarbons. It is highly toxic, extremely corrosive and flammable, and for these reasons, its elimination is necessary prior to emission in atmosphere. There are different technologies for the removal of H2S, the drawbacks of which are the high costs and limited H2S conversion efficiency. The main focus of this Special Issue will be on catalytic oxidation processes, but the issue is devoted to the development of catalysts able to maximize H2S conversion to sulfur minimizing SO2 formation, pursuing the goal of “zero SO2 emission”.This Special Issue is particularly devoted to the preparation of novel powdered/structured supported catalysts and their physical–chemical characterization, the study of the aspects concerning stability and reusability, as well as the phenomena that could underlie the deactivation of the catalyst.This Special Issue comprises seven articles, one communication, and one review regarding the desulfurization of sour gases and fuel oil, as well as the synthesis of novel adsorbents and catalysts for H2S abatement. In the following, a brief description of the papers included in this issue is provided to serve as an outline to encourage further reading.


Book
Earth Observations for Addressing Global Challenges
Authors: --- --- --- ---
Year: 2020 Publisher: Basel, Switzerland MDPI - Multidisciplinary Digital Publishing Institute

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"Earth Observations for Addressing Global Challenges" presents the results of cutting-edge research related to innovative techniques and approaches based on satellite remote sensing data, the acquisition of earth observations, and their applications in the contemporary practice of sustainable development. Addressing the urgent tasks of adaptation to climate change is one of the biggest global challenges for humanity. As His Excellency António Guterres, Secretary-General of the United Nations, said, "Climate change is the defining issue of our time—and we are at a defining moment. We face a direct existential threat." For many years, scientists from around the world have been conducting research on earth observations collecting vital data about the state of the earth environment. Evidence of the rapidly changing climate is alarming: according to the World Meteorological Organization, the past two decades included 18 of the warmest years since 1850, when records began. Thus, Group on Earth Observations (GEO) has launched initiatives across multiple societal benefit areas (agriculture, biodiversity, climate, disasters, ecosystems, energy, health, water, and weather), such as the Global Forest Observations Initiative, the GEO Carbon and GHG Initiative, the GEO Biodiversity Observation Network, and the GEO Blue Planet, among others. The results of research that addressed strategic priorities of these important initiatives are presented in the monograph.


Book
Modern Technologies and Their Influence in Fermentation Quality
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ISBN: 3039289489 3039289470 Year: 2020 Publisher: MDPI - Multidisciplinary Digital Publishing Institute

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During the last few years, industrial fermentation technologies have advanced in order to improve the quality of the final product. Some examples of those modern technologies are the biotechnology developments of microbial materials, such as Saccharomyces and non-Saccharomyces yeasts or lactic bacteria from different genera. Other technologies are related to the use of additives and adjuvants, such as nutrients, enzymes, fining agents, or preservatives and their management, which directly influence the quality and reduce the risks in final fermentation products. Other technologies are based on the management of thermal treatments, filtrations, pressure applications, ultrasounds, UV, and so on, which have also led to improvements in fermentation quality in recent years. The aim of the issue is to study new technologies able to improve the quality parameters of fermentation products, such as aroma, color, turbidity, acidity, or any other parameters related to improving sensory perception by the consumers. Food safety parameters are also included.

Keywords

low-ethanol wines --- wine-related fungi --- non-Saccharomyces --- yeasts --- narince --- wine quality --- tryptophol --- low ethanol wine --- serotonin --- non-conventional yeasts --- Bombino bianco --- Schizosaccharomyces pombe --- volatile compounds --- ethyl carbamate --- phthalates --- autochthonous --- meta-taxonomic analysis --- Pichia kluyveri --- pH control --- IAA --- Torulaspora delbrueckii --- chemical analyses --- aroma profile --- yeast --- enzymatic patterns --- wine flavor --- fermentation --- must replacement --- Saccharomyces cerevisiae --- malolactic fermentation --- wine --- HACCP --- food quality --- sequential inoculation --- alcoholic beverages --- itaconic acid --- biocontrol application --- white wine --- hydroxytyrosol --- tryptophan --- glucose --- kinetic analysis --- wine aroma --- amino acid decarboxylation --- lactic acid bacteria --- vineyard soil --- wine color --- tyrosol --- Saccharomyces --- Gompertz-model --- sequential culture --- biogenic amines --- SO2 reduction --- climate change --- Vineyard Microbiota --- A. terreus --- sulfur dioxide --- human health-promoting compounds --- Hanseniaspora guilliermondii --- non-Saccharomyces screening --- aromatic/sensorial profiles --- Malvar (Vitis vinifera L. cv.) --- probiotics --- Yeasts --- native yeast --- color --- glutathione --- hot pre-fermentative maceration --- technological characterization --- wine-related bacteria --- Riesling --- Torulaspora microellipsoides --- Lachancea thermotolerans --- Metschnikowia pulcherrima --- cashew apple juice --- resveratrol --- biocontrol --- shiraz --- Tannat --- ochratoxin A --- aroma compound --- trehalose --- wine composition --- Hanseniaspora uvarum yeast --- food safety --- acidity --- sensory evaluation --- viticulture --- melatonin --- alcoholic fermentation --- aroma

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