Materias
(58)
texto impreso
Increasing consumer demand for microbiologically safer foods, greater convenience, smaller packages, and longer product shelf life is forcing the industry to develop new food-processing, cooking, handling, and packaging strategies. Nonfluid read[...]texto impreso
ROLF D. JOERGER, AutorAtremendous effort has been made over the last decade to develop and test films with antimicrobial properties to improve food safety and shelf life. This review catalogues and analyses the outcome of these research efforts. The bacteriocin nis[...]documento electrónico
SILVERA, CARLOS, Autor ; ESCOBAR, DANIELA, Autor ; REPISO, LUIS, Autor ; MÁRQUEZ, ROSA, Autor | México [MÉXICO] : AM Editores | 2013Se estudian los conceptos asociados con la elaboración y usos industriales de las películas flexibles comestibles, incluyendo las cubiertas que actúen en forma positiva sobre la vida útil y la calidad del alimento en términos generales .Se consi[...]texto impreso
Yam starch films were obtained by casting. Effect of different film thicknesses (0.07, 0.09, 0.11 mm) and concentrations of glycerol (1.30, 1.65 and 2.00% w/w) and starch (3.30, 3.65 and 4.00% w/w) were evaluated. Barriers, mechanical and optica[...]texto impreso
Studies were carried out to produce biodegradable films from cassava starch. Two alternatives were investigated. In the first, films were obtained by starch gelatinization followed by thermopressing and glycerol was used at different concentrati[...]texto impreso
The viscoelastic properties of edible films can provide information at the structural level of the biopolymers used. The objective of this work was to test three simple models of linear viscoelastic theory (Maxwell, Generalized Maxwell with two [...]texto impreso
Chitosan (CH) and methylcellulose (MC) are hydrocolloids with good film-forming properties. The objectives of the present work were to characterize: (i) rheological and surface tension properties of the filmogenic suspensions and (ii) water solu[...]texto impreso
Recently, it was observed that the myofibrillar as well as the sarcoplasmatic proteins obtained from fish are capable to form films. The objectives of this work was to elaborate and to characterize the water vapor permeability (WVP), the color a[...]documento electrónico
ESCOBAR, DANIELA, Autor ; MÁRQUEZ, ROSA, Autor ; REPISO, LUIS, Autor ; SALA, ANGELINA, Autor ; SILVERA, CARLOS, Autor ; HARISPE, RODRIGO, Autor | Montevideo [URUGUAY] : Laboratorio Tecnológico del Uruguay (LATU) | 2010El objetivo es elaborar films comestibles en base a aislado de suero proteico.documento electrónico
ESCOBAR, DANIELA ; MÁRQUEZ, ROSA ; REPISO, LUIS ; SALA, ANGELINA ; SILVERA, CARLOS | Montevideo [URUGUAY] : Laboratorio Tecnológico del Uruguay (LATU) | 2007Dentro del estudio de los films comestibles, es importante la influencia de los plastificantes en la matriz base de los mismos. Cuando estos son agregados en otros materiales, sufren cambios en las propiedades físicas y mecánicas del material. [...]Article : documento electrónico
ROMINA BERINO, Autor ; DIEGO ARMANDO PEZZELATTO, Autor ; GERMÁN DAVID BÁEZ, Autor ; EMILCE ELINA LLOPART, Autor ; GRISELDA BALLERINI, Autor ; ANDREA MORO, Autor ; NÉSTOR JORGE DELORENZI, Autor ; PABLO ANDRÉS BUSTI, Autor |Se optimizaron las condiciones para la preparación de películas biopoliméricas capaces de encapsular los valores diarios máximos recomendados de la vitamina liposoluble E (?-tc), incorporando nanocomplejos formados por la proteína láctea beta la[...]texto impreso
The materials most used for food packaging are the petrochemical-based polymers, due to their availability in large quantities at low cost and favourable functionality characteristics, such as, good tensile and tear strength, good barrier prope[...]documento electrónico
M. ROSARIO PALOMO MARIN, Autor ; EDUARDO PINILLA GIL, Autor ; LORENZO CALVO BLAZQUEZ, AutorCd and Pb determination in ambient aerosol samples based on SWASV at a Bi film glassy carbon electrode is described. Extremely acid solutions resulting from sample digestion were directly assayed, with sufficient detection limits for testing the[...]texto impreso
The aim of the present paper was to study the filmogenic capacity of Amaranth flour. The films were obtained in a casting process using glycerol as plasticizer. The influence of the glycerol content, pH, temperature of heating process and drying[...]texto impreso
The effects of drying temperature, drying relative humidity and film thickness on the drying characteristics, water vapor permeability, and tensile properties of glycerol (Gly)-plasticized whey protein isolate (WPI) films were investigated. 50% [...]texto impreso
ZARITSKY, N., AutorEdible coatings can extend the shelf-life of foods by functioning as solute, gas, and water vapor barriers. Moreover, they can be used as a host for additives in the conservation of the properties of the product or simply in order to improve its[...]texto impreso
The aqueous extract of two ecotypes of murta (Ugni molinae Turcz) leaves (Soloyo Grande ‘‘SG’’ and Soloyo Chico ‘‘SC’’), were analysed for their antioxidant capacity, SC extract exhibiting a higher antioxidant capacity than SG extract. This diff[...]texto impreso
Antimicrobial films appear in response of the searching for more competitive and aggregated value packaging. With the aim of developing packages that, besides active are also biodegradable, this work proposes to study the effect of antimicrobial[...]texto impreso
Proteins from fish muscle are biopolymers capable of forming edible films. Thus, the objective of this paper was the study of some physical properties of films produced with the sarcoplasmic and myofibrillar proteins (MP) from Thai Tilapia muscl[...]texto impreso
Moisture sorption isotherms and water barrier properties of films made from hydroxypropyl methylcellulose (HPMC) containing surfactant mixtures of sorbitan monostearate (SPAN 60) and sucrose palmitate (sucrose ester P-1570) were evaluated at 10 [...]texto impreso
Myofibrillar and sarcoplasmic proteins are capable of forming a continuous matrix. Therefore,muscle proteins of two varieties of Tilapia were used to study the effect of the thermal treatment of filmogenic solutions (FS) on the mechanical proper[...]texto impreso
Biofilms are made of biopolymers. In the casting technique, biofilms are obtained by the drying of a polymer suspension in the final stage of processing. The aim of the present paper was to analyze the effect of this drying process on the mechan[...]texto impreso
The objective of this paper was to study the effect of plasticizers and their concentrations on the thermal and functional properties of gelatin-based films. Four polyols (glycerol—GLY, propylene glycol—PPG, di- DTG and ethylene glycol—ETG) were[...]Article : documento electrónico
ESCOBAR, DANIELA, Autor ; MÁRQUEZ, ROSA, Autor ; SILVERA, CARLOS, Autor ; SALA, ANGELINA, Autor ; REPISO, LUIS, Autor |Dentro INNOTEC (No. 3, dic. 2008)El incremento del interés en alimentos de alta calidad con mayor vida útil y un menor impacto a nivel ambiental ha llevado al estudio y desarrollo de películas y coberturas comestibles y/o biodegradables. Éstas son una excelente alternativa de e[...]texto impreso
En los últimos años se ha investigado intensamente en el campo de los films y recubrimientos comestibles y los esfuerzos continúan debido a la creciente demanda por parte de los consumidores respecto de alimentos de calidad, saludables y seguros[...]Article : documento electrónico
KADAFFI LEÓN ARCE ORTIZ, Autor ; KAREN JOHANA ORTEGA VILLALBA, Autor ; CLAUDIA ISABEL OCHOA-MARTINEZ, Autor ; CARLOS VÉLEZ PASOS, Autor |Los recubrimientos y películas elaborados lactosuero (WPI) y quitosano (CHI) son conocidos por ser antifúngicos y por ser barrera para la transferencia de vapor de agua, logrando un efecto en la conservación de frutas. El objetivo de este trabaj[...]texto impreso
The use of meat myofibrillar proteins for edible film production involves initially the extraction of the macromolecule, since it is not commercially available. Thus, the objectives of this work were the extraction and characterization of bovine[...]texto impreso
ANDERSON, AARON S. ; DATTELBAUM, ANDREW M. ; MONTAÑO, GABRIEL A. ; PRICE, DOMINIQUE N. ; SCHMIDT, JURGEN G. ; MARTINEZ, JENNIFER S. ; GRACE, W. KEVIN ; GRACE, KAREN M. ; SWANSON, BASIL I.We report a general procedure to prepare functional organic thin films for biological assays on oxide surfaces. Silica surfaces were functionalized by self-assembly of an amine-terminated silane film using both vapor- and solution-phase depositi[...]texto impreso
Biodegradable films from many protein sources have in recent decades attracted a lot of attention for their potential use in food protection because they have several advantages over synthetic films, including those related to the environment. T[...]texto impreso
The influence of glycerol concentration on some physical properties such as the thermal, mechanical, water solubility, hydrophilicity and water barrier properties of feather keratin films was studied. Feather keratin was extracted with an aqueou[...]texto impreso
Research on edible and biodegradable films had been promoted recently because of environmental concerns. The use of these materials for packaging applications is conditioned by their functional properties, which are influenced by many factors, i[...]texto impreso
Proteins are considered potential material in natural films as alternative to traditional packaging. When gamma radiation is applied to protein film forming solution it resulted in an improvement in mechanical properties of whey protein films. T[...]texto impreso
The effect of deacetylated xanthan gum, additives (sucrose, soybean oil, sodium phosphate and propylene glycol) and pH modifications on mechanical properties, hydrophilicity and water activity of cassava starch–xanthan gum films has been studied[...]texto impreso
texto impreso
This work aimed to develop an edible antimicrobial coating based on a starch–chitosan matrix to evaluate its effect on minimally processed carrot by means of microbiological analyses. Coatings based on 4% yam starch (w/w) + 2% glycerol (w/w) and[...]texto impreso
Yam starch films were produced by thermal gelatinization of starch suspensions using different starch and glycerol concentrations and were compared to control samples without glycerol. Films were characterized by polarized light microscopy, scan[...]texto impreso
Xanthan gum deacetylation, additives (sucrose, soybean oil, sodium phosphate and propylene glycol) and pH modifications influence on cassava starch-based films microstructure and color has been studied. X-ray diffraction and microscopic analysis[...]texto impreso
Studies on the moisture sorption characteristics of poly(vinyl alcohol)/starch blends for water activity (aw) values of 0.1– 0.9 were performed at 27°C. The equilibrium moisture content at different aw values was used to fit different sorption i[...]texto impreso
A indústria de processamento de aves produz uma grande quantidade de penas que são usualmente utilizadas na formulação de ração animal. A queratina é uma proteína fibrosa encontrada neste tipo de resíduo, a qual pode ser classificada como um pol[...]Article : documento electrónico
ESCOBAR, DANIELA, Autor ; SALA, ANGELINA, Autor ; MÁRQUEZ, ROSA, Autor ; HARISPE, RODRIGO, Autor |Dentro INNOTEC (No. 4, dic. 2009)Las películas se elaboraron a partir de soluciones de aislado de proteínas de suero lácteo (WPI), utilizando glicerol como plasticante y con el agregado o no de sorbato de potasio como conservador. Los métodos utilizados fueron el de moldeo por [...]documento electrónico
ESCOBAR, DANIELA, Autor ; SALA, ANGELINA, Autor ; SILVERA, CARLOS, Autor ; HARISPE, RODRIGO, Autor ; MÁRQUEZ, ROSA, Autor | Montevideo [URUGUAY] : Laboratorio Tecnológico del Uruguay (LATU) | 2010Las películas se elaboraron a partir de soluciones de aislado de proteínas de suero lácteo (WPI), utilizando glicerol como plastificante y con el agregado o no de sorbato de potasio como conservador. Los métodos utilizados fueron el de moldeo po[...]texto impreso
As proteínas miofibrilares são materiais promissores na tecnologia de filmes comestíveis. Os objetivos deste trabalho foram verificar a influência do tipo de ácido sobre a permeabilidade ao vapor de água de biofilmes à base de proteínas miofibri[...]texto impreso
CARVALHO, R. A., Autor ; SOBRAL, PAULO JOSE DO AMARAL, Autor ; FAVARO-TRINDADE, C. S., AutorEdible films are thin materials based on biopolymers from renewable sources, and plasticizers. Normally plasticizers are colorless low molecular components. The use of natural pigments may be valuable for the edible film technology. The choice o[...]texto impreso
The short-term stability and the water sorption of films prepared from binary mixtures of chitosan and native amylose maize starch (Hylon VII) were evaluated using free films. The aqueous polymer solutions of the free films contained 2% (w/w) fi[...]texto impreso
A elaboração de filmes comestíveis à base de biopolímeros implica conhecimento das propriedades físico-químicas da macromolécula. Os objetivos deste trabalho foram a descrição de um método de preparo de proteínas miofibrilares de tilápia-do-nilo[...]texto impreso
GROSSO, C. R. F., Autor ; CHAMBI, M., AutorMechanical and permeability properties of plant tissues are mainly dependent on cell walls that show in their composition polysaccharides (cellulose, glucomannans, and pectins) and differente proteins standing out protein rich in proline.texto impreso
The improvement of the safety and quality of minimally processed foods is of major interest to both the consumer and the food industry and is the topic of an EU-sponsored research project with nine international partners. The project optimizes e[...]texto impreso
A utilização de proteínas sarcoplasmáticas junto de proteínas miofibrilares pode ser interessante na tecnologia de filmes comestíveis, pois eliminaria o processo de lavagem do músculo no preparo das proteínas. O objetivo deste trabalho foi estud[...]texto impreso
Apresenta-se neste trabalho um processo brando de extração de queratina de penas de frango em solução aquosa contendo uréia, 2-mercaptoetanol e um surfactante (pH 9,0). Fforam realizadas as determinações das massas molares, do perfil de aminoáci[...]texto impreso
Effects of plasticizers (glycerol, sorbitol, and 1:1 mixture of glycerol and sorbitol) on moisture sorption characteristics of hydrophilic soyprotein isolate (SPI) films were investigated at three levels of plasticizer concentration (0.3, 0.5, a[...]texto impreso
Transparent glycerol (Gly)-plasticized whey protein isolate (WPI) sheets could be formed from Gly-WPI mixtures using compression molding, demonstrating that such mixtures display flowability and fusion behavior under certain conditions. The effe[...]texto impreso
The thermal stability of starch cross-linked with tetraethylene glycol diacrylate was studied under nitrogen atmosphere by thermogravimetry (TG) and infrared spectroscopy (FTIR). The cross-linking reaction was confirmed by the increase in intens[...]texto impreso
Moisture sorption isotherms of high amylose corn starch (HACS) films at 5, 25, 35 and 45 oC within an approximate water activity (aw)range of 0.11–0.85 were obtained using a static gravimetric method. HACS films fitted a type III BET model at al[...]documento electrónico
VM HERNANDEZ-IZQUIERDO, Autor ; JM. KROCHTA, AutorIncreasing interest in high-quality food products with increased shelf life and reduced environmental impact has encouraged the study and development of edible and/or biodegradable polymer films and coatings. Edible films provide the opportunity[...]texto impreso
ALVES, V. D., Autor ; COELHOSO, I. M., Autor ; COSTA, N. R. R., AutorThe intense use of synthetic packaging films has led to serious ecological problems due to their non-biodegradability. Consequantly , research interest into the use of biodegradable natural biopolymers has greatly increased.texto impreso
Effects of plasticizers (glycerol, sorbitol, and 1:1 mixture of glycerol and sorbitol) on moisture sorption characteristics of cassava starch films were investigated at three levels of plasticizer concentration (0, 20, and 40 g/100 g starch). Th[...]texto impreso
The water vapor (WVP) and oxygen (O2P) permeabilities of beeswax (BW), candelilla wax (CnW), carnauba wax (CrW) and microcrystalline wax (MW), formed as freestanding films, were determined. CnW and CrW both had small values for O2P (0.29 and 0.2[...]texto impreso
Water transport in edible films of starch based products is a complex phenomenon due to the strong interaction of sorbed water molecules with polymeric structure of starch. Water sorption isotherms on high amylose starch based films are highly n[...]