1,721,310 research outputs found
Alimenti funzionali e nutraceutici per la salute
Full text linkAtti del Convegno su Alimenti funzionali e nutraceutici per la salute, organizzato a Camerino il 28-06-2016, a cura della Piattaforme Tematiche di Ateneo su “Alimenti e Nutrizione” e “Salute Umana e Animale”, in collaborazione con Ufficio Stampa e Comunicazione e ILO di UNICAM
The influence of different types of preparation (espresso and brew) on coffee aroma and main bioactive constituents
Full text linkCoffee is one of the most popular hot drinks in the world; it may be prepared by several methods, but the most common forms are boiled (brew) and pressurized (espresso). Analytical studies on the substances responsible for the pleasant aroma of roasted coffee have been carried out for more than 100 years. Brew coffee and espresso coffee (EC) have a different and peculiar aroma profile, demonstrating the importance of the brewing process on the final product sensorial quality. Concerning bioactive compounds, the extraction mechanism plays a crucial role. The differences in the composition of coffee brew in chlorogenic acids and caffeine content is the result of the different procedures of coffee preparation. The aim of the present review is to detail how the brewing process affects coffee aroma and composition
ANALYSIS OF CARBAMATE AND PHENYLUREA PESTICIDE RESIDUES IN FRUIT JUICES BY SOLID-PHASE MICROEXTRACTION AND LIQUID CHROMATOGRAPHY-MASS SPECTROMETRY
No full textA new analysis method to detect carbamates and phenylurea pesticide residues in fruit juices was developed using solid-phase microextraction (SPME) coupled with liquid chromatography–single quadrupole mass spectrometry (LC/MS) and liquid chromatography–quadrupole ion trap mass spectrometry (LC/QIT-MS). The pesticide residues present in watery matrices as fruit juices were extracted using three types of fibers: 50-μm Carbowax/templated resin (CW/TPR), 60-μm poly(dimethylsiloxane)/divinylbenzene (PDMS/DVB) and 85-μm polyacrylate. The different extraction conditions were evaluated choosing as the best parameters 90 min (time), 20 °C (temperature) and 1 ml (volume). After extraction, the desorption (in a static mode) was performed in the specific interface chamber SPME/HPLC, previously filled with 70% methanol and 30% water. The best recoveries, evaluated at two fortification levels (0.2 and 0.5 mg kg−1) in fruit juices, were obtained using PDMS/DVB and CW/TPR fibers, and ranged from 25 to 82% (monolinuron, diuron and diethofencarb), with relative standard deviations (RSDs) from 1 to 17%. All the limits of quantification (LOQs) were in the range of 0.005–0.05 μg ml−1 and, in any case, equal to, or lower than, maximum residue limits (MRLs) established by Italian and Spanish legislations. The mass spectrometry analyses were carried out using an electrospray ionization (ESI) source operating in the positive mode both for single quadrupole and for QIT mass analysers, operating in selected ion monitoring (SIM) and in multiple reaction monitoring (MRM) modes, respectively. The proposed new method can be applied to the determination of selected pesticides in real samples of fruit juices
Imballaggio per alimenti freschi di origine animale che inibisce lo sviluppo delle ammine biogene
No full textLa presente invenzione si riferisce a un imballaggio per alimenti freschi, in particolare per
carne e pesce. Tale sistema ha la prerogativa di inibire lo sviluppo delle ammine biogene e di
prolungare le caratteristiche di freschezza degli alimenti, la conservabilità e il mantenimento delle caratteristiche organolettiche
Cibo e nutraceutici: parola chiave "caratterizzazione"
Full text linkLibro degli atti del 4° Convegno a cura delle Piattaforme Tematiche di Ateneo su "Alimenti e Nutrizione" e "Salute umana e animale", da titolo Cibo e nutraceutici: parola chiave "caratterizzazione". Il Convegno si è tenuto il 9 luglio 2019 a Camerino, c/o l'Auditorium Benedetto XIII, via le Mosse, Colle Paradiso
Utensile per la sterilizzazione della lancia vapore delle macchine da caffè
No full textUtensile per la sterilizzazione della lancia vapore delle macchine da caffè, caratterizzato per il fatto di consistere sostanzialmente in un bicchiere con pareti isolate termicamente, che risulta chiuso in sommità da una membrana in gomma dotata di un foro centrale e che reca un condotto di sfiato eseguito in corrispondenza delle sue pareti laterali al di sotto dell’anzidetta membrana
Giornata studio sulle tecniche preparative dei campioni analitici
No full textLa Microestrazione in fase solida (SPME):Cenni storici, introduzione alla tecnica di campionamento, suggerimenti ed applicazioni.
L'estrazione in fase solida (SPE): teoria, dispositivi e applicazioni
Determination of fourteen polyphenols in pulses by high performance liquid chromatography-diode array detection (HPLC-DAD) and correlation study with antioxidant activity and colour
No full textPulses, which include lentils, beans, chickpeas, peas, and soybeans, provide an important source of proteins, dietary fibers, minerals and vitamins, as well as such important bioactive molecules as polyphenols. The presence of polyphenols is often related to the colour of the pulse and to its antioxidant activity. The aim of this work was to set up a new HPLC-DAD method for simultaneously analysing 14 polyphenolic compounds, including two anthocyanins, in different varieties of pulses and to correlate the polyphenol content with the seed coat colour and the antioxidant activity. The total content of the analysed polyphenols ranged from 3 mg/kg for dehulled red lentils to 1630.5 mg/kg for ruviotto beans. Samples with dark testa (or seed coat), namely black lentils and diavoli beans, had higher antioxidant activity than those with pale testa, and a positive correlation was found between total phenolic content (TPC) and IC50 for dark coloured varieties
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