1,720,978 research outputs found
Industrial beer versus craft beer: Definitions and nuances
No full textThis chapter defines the concepts of industrial and craft beers and provides the reader with information on industrial versus craft beer’s characteristics (e.g., raw materials, brewing processes, stabilization, attributes, and flavor of industrial beer and craft beer). It also illustrates the new potentialities of the beer market related to the growing popularity of craft beer. The evolution of the market is shown in terms of product differentiation driven by both demand and supply
Use of olive (Olea europaea L.) leaves as beer ingredient, and their influence on beer chemical composition and antioxidant activity
No full textAbstract: Olive leaves are well known for their high polyphenol content and beneficial effects to human health. The two main phenolic compounds of olive leaves are oleuropein and 3-hydroxytyrosol. Use of olive leaves as beer ingredient was evaluated, to investigate their contribution to bitterness and antioxidant activity of beer. Thirteen beer samples were produced, adding olive leaves during boiling at different boiling times, in different forms and concentrations. Three different forms were used: dry crumbled leaves, infusion, and atomized extract. The effects of olive leaves addition were evaluated through following analysis: total polyphenols content, oleuropein and 3-hydroxytyrosol content, antioxidant capacity, sensory analysis, shelf-life prediction. Results confirmed that addition of olive leaves highly increased polyphenol content of beers. Boiling time favored hydrolysis of oleuropein to 3-hydroxytyrosol. Antioxidant activity was not influenced by addition of olive leaves. Higher polyphenol content of beer samples increased colloidal instability of beer. Sensory analysis results demonstrated that about 10 g/L of olive leaves imparts a sour/astringent taste and herbal aroma. A lower quantity of olive leaves (about 5 g/L) allowed to obtain a beer with a pleasant sensory profile. Practical Application: Our research was inspired by both the high interest in alternative ingredients able to add nutraceutical value to traditional food, and by the growing craft beer market, with its constant research for innovative and characterizing ingredients. This project has several aims: evaluate if olive leaves could partially substitute hops in beer bittering (reducing costs); if their addition increase beer polyphenol content; which amount and using technique gives the best results in terms of polyphenol extraction and sensory profile; how this addition influence beer stability. This work could then encourage new research about the nutraceutical value of this new type of beer
Confezionamento asettico delle bevande: proposte per incrementare le caratteristiche di qualità e sicurezza
No full textConfezionamento asettico delle bevande: proposte per incrementare le caratteristiche di qualità e sicurezz
Prime esperienze di applicazione della flottazione nei processi di chiarifica ed illimpidimento dei mosti d'uva
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Biotransformations Performed by Yeasts on Aromatic Compounds Provided by Hop—A Review
Full text linkThe biodiversity of some Saccharomyces (S.) strains for fermentative activity and metabolic capacities is an important research area in brewing technology. Yeast metabolism can render simple beers very elaborate. In this review, we examine much research addressed to the study of how different yeast strains can influence aroma by chemically interacting with specific aromatic compounds (mainly terpenes) from the hop. These reactions are commonly referred to as biotransformations. Exploiting biotransformations to increase the product’s aroma and use less hop goes exactly in the direction of higher sustainability of the brewing process, as the hop generally represents the highest part of the raw materials cost, and its reduction allows to diminish its environmental impact
Resultats de plusieurs années d'experiences d'application de la clarification des moûts par flottation
No full textResultats de plusieurs années d'experiences d'application de la clarification des moûts par flottatio
Use of Friulan saffron in the production of craft beer
No full textSaffron (Crocus sativus L.) is the most expensive spice in the world. Saffron is costly due to the meagre yield per acre and exorbitant manpower costs. The three key compounds in saffron are crocin, picrocrocin and safranal, which are responsible for its colour, bitterness and flavour, respectively. The aim of this study was to exploit the bittering, aromatic and colouring properties of saffron to formulate a craft beer with refined taste and colour. As a result of the elevated price of the raw material, the saffron extraction process was optimised to achieve the best results using as little spice as possible. Thus, the extraction yields of two different methods were ascertained. To assess the ideal concentration of saffron to obtain a beverage with a balanced taste, three beers containing increasing concentrations of the spice were brewed. Then, once a sensory test was performed, another three samples were produced with the minimum dose of the spice (50 mg/L), added at various times during the production process (at 5 and 20 min before the end of the boiling stage, during the whirlpool stage and during refermentation). The purpose was to evaluate the consequences of heat treatment on crocin, picrocrocin and safranal compounds provided to the beer. All of the beer samples underwent routine analyses (alcoholic strength, Plato, IBU, colour and pH) and were analysed by spectrophotometry
Tecniche per ridurre i fattori antinutrizionali nel vino. Parte I
No full textTecniche per ridurre i fattori antinutrizionali nel vin
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