Ruben Bustos

• Ph.D. in Chemical Engineering, The Queen's University of Belfast, U.K.
• Engineer at University of Santiago Chile

Sulforaphane (SFN) is a bioactive compound widely studied for its potential applications in pharmaceutical, nutraceutical, and food industries since it offers health benefits due to its nature as a Phase 2 enzyme inducer. Its application in the food industry has been limited because SFN is unstable at high temperatures in an aqueous milieu. An opti...

BACKGROUND Blueberries contain large amounts of phenolic compounds as well as a higher concentration of anthocyanins than other berries. The peel of these fruits contains most of the anthocyanins and therefore pomace is left with the largest quantity of valuable phenolic compounds. Extraction is the most critical step to obtain such compounds. OBJ...

In recent years, the use of native berries has increased, since the presence of elevated levels of bioactive compounds and, consequently compounds that provide beneficial effects for human health has been shown. This study reviews the nutritional aspects, phytochemical composition, and biological activities of native berries of Chile, specifically...

Los adultos mayores son especialmente vulnerables a sufrir enfermedades asociadas al tracto gastrointestinal, ya que el envejecimiento conlleva naturalmente a un desbalance en la diversidad y cantidad de los microorganismos presentes en el intestino. Por ello, la suplementación de su dieta con oligosacáridos y polisacáridos no digestibles (OPND) ha...

Encapsulated fat-soluble powders containing vitamin A (VA) and E (VE) were prepared as a feasible additive for extruded feed products. The effect of the encapsulating agents (Capsul-CAP®, sodium caseinate-SC) in combination with Tween 80 (TW) as an emulsifier and maltodextrin (MD) as a wall material on the physicochemical properties of emulsions an...

The health–promoting properties of sulforaphane (SFN) are well known, however its instability is still a hurdle for its incorporation into food matrices. SFN can be stabilized by microencapsulation, technique sparingly explored for isothiocyanates so far. This review summarizes the advances in microencapsulation of SFN and other isothiocyanates. En...

The aim of this work was to evaluate the effect of different wall materials, sodium caseinate (CS) and a modified starch Capsul® (CAP), on the physical and oxidative stability of nanoemulsions with vitamin E, to obtain a nanoencapsulated vitamin ingredient. An experimental Box-Behnken design was established, where three factors were analyzed: type...

1. Introducción La encapsulación de vitaminas lipofílicas presenta ventajas tales como proteger el compuesto de factores ambientales, reducir su interacción con otras vitaminas y/o moléculas presentes en un alimento y mejorar su biodisponibilidad y liberación 1. Para ello, es posible utilizar el proceso de nano-emulsificación (tamaños de gotas <100...

Active edible films have been proposed as an alternative to extend shelf life of fresh foods. Most essential oils have antimicrobial properties; however, storage conditions could reduce their activity. To avoid this effect the essential oil (EO) can be microencapsulated prior to film casting. The aim of this study was to determine the effects of th...

Edible films and coatings have been proposed as viable alternatives for the preservation of fresh food such as fruit, meat, fish and cheese. They can be designed to contain natural antioxidants, vitamins and antimicrobials in order to extend shelf life of the product keeping the natural sensorial properties. Essential oils have been targeted as pot...

Murtilla (Ugni molinae Turcz) fruit has a unique aroma; along with its pleasant sweet flavour, this has stimulated its commercial development in international markets. This development, however, requires the application of suitable conservation methods. Five different packaging treatments for murtilla fruit (Red Pearl-INIA variety) conservation wer...

Gelatine from marine sources has been looked upon as a possible alternative to bovine and porcine gelatine. Common problems connected with fish gelatine from cold water species, such as those from Chilean coast, are low gelling and melting temperature and low gel modulus. Squeezing flow technique was applied to obtain rheological parameters as func...

The effect of particle size, use of infrared radiation, and type of freeze-drying (vacuum or atmospheric) on some nutritional properties of blueberries was investigated. Ascorbic acid was decreased in freeze-dried blueberries compared with fresh fruit, while polyphenols were decreased in atmospheric freeze-drying-unlike in vacuum freeze-drying, whe...

Different operating conditions for drying halves of ‘Murtilla’, a native Chilean berry food species, were studied in atmospheric freeze drying, using dry air through a pulsed fluidized bed, and vacuum freeze drying. Applying a 2 experimental design, the effect of the freezing rate, the air temperature, and the application of infrared radiation was...

'Murtilla', 'mutilla' or 'murta' ( Ugni molinae Turcz) is a native Chilean species that produces a small berry fruit with a special aroma and a high antioxidant capacity. It is consumed raw, as jams, juices, canned products, confectioneries and liquors. The short production season demand application of preservation processes in order to enjoy the s...

The drying of carrot particles (6 mm × 6 mm × 12 mm) was studied in a tunnel dryer; a vacuum-freeze dryer, either with or without infrared radiation; a pulsed fluidized-bed dryer assisted by microwave radiation; and combinations of these methods. The effect of two freezing rates (quick freezing in liquid nitrogen and slow freezing in a household fr...

BACKGROUND: ‘Murtilla’, ‘mutilla’ or ‘murta’ (Ugni molinae Turcz) is a native Chilean species that produces a small berry fruit with a special aroma, whose volatile compounds have not yet been identified. The fruit may be consumed raw and also as jams, juice, canned products, confections and liquor. RESULTS: At the beginning and end of the storage,...

Concentration, gel strength (Bloom), and pH effects on both melting and gelling temperatures of gelatin were studied using small amplitude oscillatory rheology. Temperature sweeps were applied to gelatin gel samples for heating and cooling at fixed frequencies. Results showed that melting temperatures were higher than gelling temperatures, and both...

Stability of ω-3 polyunsaturated fatty acids (PUFAs) and astaxanthin pigments in a aqueous suspension of krill oil/chitosan microcapsules was studied. Physically stable and homogeneous microcapsules were obtained with chitosan of different molecular weight. PUFAs were stable during the first 15 days of the study retaining over 95% of the eicosapent...

The presence of trypsin-like enzymes was evaluated in different waste fractions produced during mechanical peeling of Antarctic krill (Euphausia superba) using N-α-benzoylarginine p-nitroanilide as substrate. The enzymes were highly concentrated in the exudate (drip) obtained after thawing 25 kg of frozen krill blocks. They presented an unusually h...

The stabilisation of trypsin-like enzymes purified from krill processing wastewater was studied using different proteins, polyols and polysaccharides. The effect of the different stabilisers was evaluated both in solution and in dry samples of the enzymes. In 40% (w/v) stabiliser solutions, the increase in half-life of enzyme activity followed the...

Biotreatment leading to bioconversion of waste materials is probably the most cost-effective and certainly the most environmentally-friendly technique for managing and utilising waste. Waste materials associated with the food industry are no exception. Notable are the wastes generated by the fishing industry — fish offal, marine crustacean shell wa...

This paper appraises the potential of marine crustacean shell waste from the world's fishing industry for bioconversion to industrial products and envisages almost total low-waste utilisation of such materials. Techniques for the processing of waste shells are considered and compared. We additionally investigate what is considered a vital early sta...

Microbial inoculants for fish offal ensilage and proteolytic strains of Pseudomonas maltophilia were used to deproteinise prawn (Nephrops norvegicus) shell waste. Good growth was observed for all the different inoculants, with variable patterns of protease production. A maximum value of 82% deproteinisation was achieved with BAFP-202 after six days...

Thesis (Ph. D.)--Queen's University of Belfast, 1996.