Search results for " tecnologie alimentari"
showing 10 items of 320 documents
La coltivazione della Papaya in Sicilia: qualità dei frutti e prospettive
2018
Data la numerosità dei genotipi di papaia coltivati in Sicilia si è resa necessaria una caratterizzazione qualitativa degli stessi. In questo studio sono stati confrontati, da un punto di vista pomologico, chimico-fisico, nutraceutico e sensoriale, i frutti di 5 differenti genotipi di papaia nell’ottica di individuarne e definirne qualità e rispondenza per il mercato locale ed europeo.
Pomological traits, sensory characteristics and antioxidant activity in fruits of nine loquat cultivars grown in Sicily.
2014
Monitoring the Shelf-Life of Minimally Processed Fresh-Cut Apple Slices By Physical–Chemical Analysis and Electronic Nose
2014
Fresh-cut apples, in slices or in cubes, are minimally processed products, which are currently collecting a great interest by fruit marketers for their promising diffusion. Their shelf life, from a microbiological point of view, has been fixed about 2 or 3 weeks under refrigeration. However in a few days they undergo biochemical degradations with production of off-flavors and texture breakdown. In this work, the change of aromatic fingerprint of apple slices packaged in air and in a modified atmosphere (with 100% N2) and stored at 4°C was measured, by using a commercial electronic nose. The obtained data were also compared with sensory evaluation of judge’s panel. Moreover, quality paramete…
Effetti del microclima sulla componente aromatica di uve della cv Grillo
2014
Fruit chemical and sensory characteristics of five loquat (Eriobotrya japonica Lindl) cultivars.
2014
Changes in ascorbic acid content in fresh cut Sicilian yellow-flesh peaches during post harvest and in fresh cuts.
2013
The traditional yellow-flesh peach cultivars Settembrina and Ottobrina di Leonforte, ripen, the former, during the first 10 days of September and, the latter, during the first 10 days of November in Sicily (Italy). During the pit hardening stage, fruit are covered with a paper bag in order to protect them from the Mediterranean fruit fly. To understand their behaviour in term of postharvest manteinance and suitability to minimal processing, Settembrina and Ottobrina di Leonforte were processed (cleaned, washed, peeled, cut, dipped, packed) to obtain fresh-cut peaches. Fresh cut slices were also stored in perforated bi-oriented polystyrene bags, with 2% ascorbic acid and 1% calcium lactate a…
Attitudine alla trasformazione in sidro di varietà di mele autoctone siciliane
2011
Questo studio rappresenta un’indagine preliminare sulla caratterizzazione di sidri ottenuti in via sperimentale impiegando mele coltivate in sicilia. Per la sperimentazione sono state scelte tre varietà di mele autoctone siciliane (cardinale, Gelata e Virticchiaro). Prima del processo di trasformazione, i frutti sono stati sottoposti ad analisi delle caratteristiche morfologiche (peso, diametro, altezza), fisiche (consistenza della polpa) e microbiologiche (presenza di lieviti sulle bucce). Il succo proveniente dalla polpa di mele è stato analizzato chimicamente (contenuto in solidi solubili, polisaccaridi, ph ed acidità titolabile del succo). La polpa finemente triturata è stata sottoposta…
Use of fortified pied de cuve as an innovative method to start spontaneous alcoholic fermentation for red winemaking
2016
Background and Aims: Some wineries, in order to promote the growth of yeasts able to ferment grape musts, traditionally produce wines using the ‘pied de cuve’ method. The aim of the present work was to study the performance of fortified pied de cuve (FPdC) prepared by addition of wine. Method and Results: Two FPdCs were prepared with the addition of wine at 1.5 and 3% (v/v) of ethanol to the musts and allowed to spontaneously ferment. The FPdCs were then added to fresh bulk musts in order to accelerate the spontaneous alcoholic fermentation (AF). Interestingly, several Saccharomyces cerevisiae strains isolated during the pied de cuve preparation were detected at the highest concentration th…
High quality extra virgin olive oil from olives attacked by the olive fruit fly, Bactrocera oleae (Rossi) (Diptera Tephritidae): which is the tolerab…
2017
The infestation due to the olive fruit fly, Bactrocera oleae (Rossi), the key pest in most of world olive groves, has been monitored in six years, from 2004 to 2008 and in 2014, in eight coastal Sicilian olive groves consisting of ‘Cerasuola’ and ‘Nocellara del Belice’ cultivars. Infestation was recorded following the classical sampling method based on olive collection and dissection, in order to count live olive fruit fly instars (eggs, larvae and pupae) and exit holes. Four different infestation indexes, all of them calculated using data recorded at harvest, have been used to assess their relationship with the main three quality parameters of the olive oil obtained from the same olive sam…
Cellulose Nanocrystals from Lignocellulosic Raw Materials
2017
Cellulose nanocrystals (CNCs) are unique, renewable top-down nano particles from which coatings with improved gas barrier properties and new functionalities can be prepared. In this paper, the potential for obtaining such high performing nanocrystals from low-cost lignocellulosic by-products or raw materials is proved by a comparison study on CNCs obtained both from cotton linters and kraft pulp, by means of the ammonium persulfate (APS) process. Morphological and chemical characterization of the nanocrystals obtained, as well as the main functional properties of the poly(ethylene terephthalate) coated films, showed quite similar characteristics and performances of CNCs obtained from pure c…