<b>Kinetic modeling of water sorption by roasted and ground coffee
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چکیده
منابع مشابه
Optimizing headspace temperature and time sampling for identification of volatile compounds in ground roasted Arabica coffee.
Equilibration time and temperature were the factors studied to choose the best conditions for analyzing volatiles in roasted ground Arabica coffee by a static headspace sampling extraction method. Three temperatures of equilibration were studied: 60, 80, and 90 degrees C. A larger quantity of volatile compounds was extracted at 90 degrees C than at 80 or 60 degrees C, although the same qualitat...
متن کاملAntioxidant properties of roasted coffee residues.
The antioxidant activity of roasted coffee residues was evaluated. Extraction with four solvents (water, methanol, ethanol, and n-hexane) showed that water extracts of roasted coffee residues (WERCR) produced higher yields and gave better protection for lipid peroxidation. WERCR showed a remarkable protective effect on oxidative damage of protein. In addition, WERCR showed scavenging of free ra...
متن کاملAroma recovery from roasted coffee by wet grinding.
Aroma recovery as determined by solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) was compared in coffees resulting from conventional grinding processes, and from wet grinding with cold and hot water. Freshly roasted coffee as well as old, completely degassed coffee was ground in order to estimate the relationship of internal carbon dioxide pressure in freshly roaste...
متن کاملThe Stabilising and Chelating Effects of Green and Roasted Coffee Extracts
ABSTRACT: Oxidation might be regarded as one of the most important reaction in oils and fats. Prooxidants namely iron and copper intensify and catalyze the oxidation while the chelating agents might retard or delay this process. Citric acid, phosphoric acid, some of phenolic compounds and phospholipids are considered as the compounds that chelate the prooxidant metals and through this mechanism...
متن کاملThe ground water ammonium sorption onto Croatian and Serbian clinoptilolite.
The removal of ammonium from the Valpovo region ground water (VGW) with the use of natural clinoptilolite samples from the Donje Jesenje deposit (Croatia) and the Zlatokop deposit in Vranjska Banja (Serbia) was studied. The natural Serbian (SZ) and Croatian zeolites (CZ) were transformed to the Na-form (Na-CZ and Na-SZ) in order to increase the exchange capacity of zeolite. The CZ and SZ theore...
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ژورنال
عنوان ژورنال: Acta Scientiarum. Agronomy
سال: 2017
ISSN: 1807-8621,1679-9275
DOI: 10.4025/actasciagron.v39i3.32576