Abstract The aim of this work was to investigate the effect glycerol contents on physical properties cassava starch films. films were prepared from film‐forming solutions (FFS) with 2g starch/100g water and 0, 15, 30 45g glycerol/100g starch, analysed determine its mechanical by tensile tests, glass‐transition temperature (Tg) differential scanning calorimetry (DSC) crystallinity X‐ray diffraction (XRD). infrared spectra also recorded. resistance values decreased, while those elasticity...

Physicochemical properties including rheology of sorghum (Sorghum saccharatum) starch, with cactus (Opuntia ficus) indica mucilage addition were evaluated. Native starch and mixtures the ratios 90:10 95:5 (g:g) prepared. A significant increase in gelatinization temperature enthalpy was observed addition. Fourier Transform Infrared (FTIR) X-ray diffraction (XRD), revealed physical interactions between mucilage, possibly by hydrogen bonds, that might restrain water mobility through granule...

The objective of this work was to study the rheological and thermal properties film forming solutions (FFS) based on blends gelatin poly(vinyl alcohol) (PVA). effect PVA concentration plasticizer presence flow behavior, viscoelastic FFS studied by steady-shear oscillatory experiments, also, microcalorimetry. presented Newtonian behavior at 30 °C, viscosity not affected neither nor plasticizer. All a phase transition during tests applying temperature scanning. It verified that dilution...

Composite flours containing 5%, 10%, 15%, and 20% of chia seed flour corn were used for tortilla formulations. The effects powders supplementation on the physicochemical sensorial characteristics as well starch digestibility tortillas evaluated. Nutritionally, all had significantly higher levels (P < 0.001) protein, lipids, total dietary fibre than control. reduced enzymatic hydrolysis rate predicted glycemic index recorded seed-added indicated slow digestion features. Sensory evaluation did...

The objective of this work was to investigate the effect zein and film formulation on mechanical structural properties native (FNS), oxidized with 2.5% (FOSA) 3.5% (FOSB) banana starch. starch showed differences from due oxidation process, showing a decrease in lipids, proteins, amylose. increase sodium hypochlorite increased content carbonyl carboxyl groups ranges 0.015–0.028% 0.022–0.031%, respectively. obtained FOSB displayed highest tensile strength (5.05 MPa) satisfactory elongation...

The production of resistant starch from non-conventional sources using an extruder was studied. Starch isolated unripe banana and mango fruits, commercial corn used for comparison purposes. Moisture, ash fat content were higher in than starch, but presented a lower protein dietary fibre starches. Amylose starches starch. Besides, had the smallest granule size (5–10 m). Extruded lowest solubility which may be related with size, case swelling, extruded products highest values, pattern that due...

BACKGROUND: Antioxidant and chelating activities were determined in protein hydrolysates that produced by treating a isolate of non-toxic genotype Jatropha curcas with the protease preparation alcalase. RESULTS: 50 min hydrolysate degree hydrolysis 31.7% showed highest antioxidant activity. These also six peptidic fractions separated gel filtration chromatography hydrolysate. The lower-molecular-weight had activities, which correlated higher content amino acids such as tyrosine histidine....

Abstract Resistant starches (RS) were prepared from banana starch by debranching with pullulanase for different times and after autoclaving treatment. The treatments produced seven RS products, which tested respect to available (AS), in vitro hydrolysis rate. control sample (without debranching) had the highest AS (80.5%) lowest content (9.1%). samples debranched 5 h longer did not show significant differences (α = 0.05) (approximately 72%) 18%). values obtained twice as high that of sample....

Abstract The chemical, physicochemical and rheological characteristics of Oxalis tuberosa starch were investigated. presented an apparent amylose content 33%, similar to maize used as control, with a granule size between 25–50 μm oval elliptical shapes A‐type X‐ray diffraction pattern. gelatinization temperature oxalis was 64.0°C, that lower than the one determined in (73.0°C), enthalpy value 12.2 J/g, which starch. Both pastes behaved weak viscoelastic systems elastic character ( G ′)...

Research studies concerning the overall effect of addition plasticizers, cross-linking and strengthening agents in gelatin film-forming mixtures are very scarce. Also, there no focused on interactions among their individual components, or showing what sort effects they might cause all together. A film obtained from a composite consisting tannic acid, bentonite glycerol was evaluated. Nine films were manufactured by casting method, using these materials, following 2(3) factorial design with...

A new method to prepare glycerol/gelatin based films, by doping the film with carbon nanotubes (CNTs) and sodium dodecyl sulfate (SDS), was proposed. SDS used disperse CNTs in gelatin/glycerol films as follows: (GG) incubated equal concentrations of CNT SDS; GG 0.001% w/w CNT/SDS; 0.002% CNT/SDS 0.004% CNT/SDS. Diffractograms /glycerol showed an amorphous structure, being consistent thermograms involving temperature fusion enthalpy. Mechanical tests 30% increase elongation at break CNT/SDS,...

The objective of this work was to obtain biomaterials as gelatin films or biofilms produced by casting, reinforced with a microfiber (MF) from Agave angustifolia Haw bagasse and bentonite (BN) nanoparticles evaluate the effect such reinforcements at different concentrations. microfibers were obtained non-abrasive chemical method. Three formulations based on glycerol microfiber, both materials 1.5, 3.5 5.5% w/w solids content. Physicochemical properties determined using SEM FTIR, thickness,...

Kefir grains represent a symbiotic association group of yeasts, lactic acid bacteria and acetic within an exopolysaccharide protein matrix known as kefiran. The mechanism growth biomass kefir after successive fermentations optimal conditions is not well understood yet. Biomass kinetics were determined to evaluate the effects temperatures (10 °C 40 °C) different substrates, such monosaccharides (fructose, galactose, glucose), disaccharides (lactose, saccharose) polysaccharides (Agave...

Encapsulation is a process in which base material encapsulated wall that can protect it against external factors and/or improve its bioavailability. Among the different encapsulation techniques, ionic gelation stands out as being useful for thermolabile compounds. The aim of this work was to encapsulate Saccharomyces boulardii by using agavins (A) and whey protein (WP) materials evaluate morphostructural changes occur during vitro gastrointestinal digestion. Encapsulations at levels A WP...

Abstract: Starch isolated from macho banana was oxidized by using 2.5% and 3.5% (w/w) of sodium hypochlorite. Native starches with glycerol were processed a conical twin screw extruder to obtain thermoplastic laminates or sheets, which partially characterized. Oxidized presented higher moisture total starch but lower ash, protein, lipids, apparent amylose content than the native starch. Micrographs sheets showed wrinkles cavities presumably caused plasticizer, less free unplasticized...