Browsing Tecnologia dels Aliments by Issue Date
Now showing items 21-40 of 597
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Inactivation of Lactobacillus brevis in orange juice by high-intensity pulsed electric fields
(Elsevier, 2005-08)High-intensity pulsed electric fields (HIPEF) is a non-thermal preservation method which is believed to be able to inactivate spoilage micro-organisms such as Lactobacillus brevis. The effects of HIPEF parameters (electric ... -
Determination of naringin and hesperidin in citrus fruit by high-performance liquid chromatography. The antioxidant potential of citrus fruit
(Akadémiai Kiadó, 2006)Naringin and hesperidin in dimethyl sulfoxide extracts of citrus fruit (oranges, red and blond grapefruit, and sweeties - a hybrid of pummelo and blond grapefruit) have been analyzed by high-performance liquid chromatography ... -
Reduction of aflatoxins by extrusion-cooking of rice meal
(Wiley, 2006)The objective of this work was to determine the reduction of aflatoxin B1 (AFB1), B2 (AFB2), G1 (AFG1), and G2 (AFG2) as a function of initial moisture content of samples (24%, 27%, and 30%), barrel temperature (140, ... -
Impact of fungicides on Aspergillus carbonarius growth and ochratoxin A production on synthetic grape-like medium and on grapes
(Taylor & Francis, 2006)A study was undertaken to evaluate the impact of the application of several fungicide treatments used in Spanish vines on Aspergillus carbonarius growth and ochratoxin A production. Three trials were designed in order: ... -
Posibilidades de sustitución de los productos químicos de síntesis en postcosecha de fruta de pepita
(Eumedia, 2007)Existe la necesidad de desarrollar nuevos y efectivos métodos de control de las alteraciones en postcosecha de fruta, los cuales sean aceptados por las nuevas exigencias del consumidor y que no supongan un ... -
Biocontrol of postharvest decay using a new strain of Pseudomonas syringae CPA-5 in different cultivars of pome fruits
(Scientific Agricultural Society of Finland, 2007)Epiphytic micro-organisms isolated from fruits and leaves surfaces of apples from different orchards were screened for antagonistic activity against Penicillium expansum. From all micro-organisms tested the new strain CPA-5 ... -
Influence of SO2 on the consumption of nitrogen compounds through alcoholic fermentation of must sterilized by pulsed electric fields
(Elsevier, 2007)The aim of this work was to study the influence of SO2 on the use of nitrogenous compounds by yeast during wine alcoholic fermentation. Thus Parellada must was sterilized by a pulsed electric field treatment and inoculated ... -
Combining regio- and enantioselectivity of lipases for the preparation of (R)-4-chloro-2-butanol
(Wiley, 2007)Preparation of 98% ee (R)-4-chloro-2-butanol was carried out by the enzymatic hydrolysis of chlorohydrin esters, using fungal resting cells and commercial enzymes. Hydrolyzes were carried out using lipases from Candida ... -
Distribution of total aflatoxins in milled fractions of hulled rice
(American Chemical Society, 2007)Two varieties of hulled rice artificially contaminated with aflatoxins at five different levels were processed by dehulling and polishing methods. Contamination levels ranged from 356 to 818 µg/kg and from 244 to 645 ... -
Studies on the interaction between grape-associated filamentous fungi on a synthetic medium
(Elsevier, 2007)Eleven fungi isolated from grapes and sun-dried grapes (Alternaria alternata, Cladosporium herbarum, Eurotium amstelodami, Penicillium janthinellum, P. decumbens, Trichoderma harzianum, Candida sp., Aspergillus carbonarius ... -
Modeling the reduction of pectin methyl esterase activity in orange juice by high intensity pulsed electric fields
(Elsevier, 2007-01)Orange juice was processed by high intensity pulsed electric fields (HIPEF) at different processing conditions: electric field strengths (E) from 5 to 35 kV/cm up to 1500 mu s of total treatment time (t) using pulses of 4 ... -
Effect of superatmospheric and low oxygen modified atmospheres on shelf-life extension of fresh-cut melon
(Elsevier, 2007-02)The physiological, physicochemical and microbiological quality of fresh-cut 'Piel de Sapo' melon packaged under 2.5 kPa O-2 + 7 kPa CO2, 21 kPa O-2 and 70 kPa O-2 atmospheres was studied. Initial low O-2 levels combined ... -
Thermal and pulsed electric fields pasteurization of apple juice: Effects on physicochemical properties and flavour compounds
(Elsevier, 2007-11-01)Apple juice, extracted from golden delicious fruits, was pasteurized using a pulsed electric field (PEF) treatment and compared with a conventional high temperature-short time (HTST) method. The PEF treatment was carried ... -
Optimization and validation of PEF processing conditions to inactivate oxidative enzymes of grape juice
(Elsevier, 2007-12)White grape juice was processed using high intensity pulsed electric fields (PEF). The effect of this preservative technology on polyphenoloxidase (PPO) and peroxidase (POD) as well as on refractometric index, sugar content, ... -
[BMIM][PF6] Promotes the synthesis of halohydrin esters from diols using potassium halides
(Japan Society for Analytical Chemistry, 2008)Haloesterification of diverse diols with various carboxylic acids was achieved using potassium halides (KX) as the only halide source in ionic liquids. The best yield was obtained in [BMIM][PF6] when 1,2-octanediol, palmitic ... -
Hidrolizados de proteína: procesos y aplicaciones
(Federación Bioquímica de la Provincia de Buenos Aires, 2008)En la hidrólisis enzimática de proteínas hasta péptidos o aminoácidos, por acción de enzimas proteolíticas, la composición final y, por tanto, el uso de los hidrolizados dependerá principalmente de la fuente proteica, ... -
Edible coatings with antibrowning agents to maintain sensory quality and antioxidant properties of fresh-cut pears
(Elsevier, 2008)The effect of alginate-based (2%, w/v), pectin-based (2%, w/v) and gellan-based (0.5%, w/v) edible coatings containing N-acetylcysteine at 0.75% (w/v) and glutathione at 0.75% (w/v) on gas exchange, antioxidant properties, ... -
Changes of health-related compounds throughout cold storage of tomato juice stabilized by thermal or high intensity pulsed electric field treatments
(Elsevier, 2008)The effect of high intensity pulsed electric fields (HIPEF) processing (35 kV/cm for 1500 μs in bipolar 4-μs pulses at 100 Hz, with an energy density of 8269 kJ/L) on the main bioactive compounds and antioxidant capacity ... -
Antioxidant properties and shelf-life extension of fresh-cut tomatoes stored at different temperatures
(Wiley, 2008)BACKGROUND: The feasibility of using modified atmosphere packaging (5 kPa O2 + 5 kPa CO2) to maintain the antioxidant properties of fresh-cut tomatoes during shelf-life was assessed through storage at different temperatures ... -
Predicting the growth/no-growth boundary and ochratoxin A production by Aspergillus carbonarius in pistachio nuts
(Elsevier, 2008)Black aspergilli are the main fungal contaminants in pistachio nuts. Ochratoxin A (OTA) production has been repeatedly reported in Aspergillus section Nigri; OTA has been occasionally detected in pistachio nuts in high ...