The aim of this study was to develop pH-sensitive films based on corn starch and anthocyanins extracted from black bean seed coat red cabbage. were developed solvent casting polymer solutions containing starch, glycerol, anthocyanin extract (from cabbage or bean) prepared at pH 5. color changed pink purple blue, as a function the pH. evaluated by their morphological, chemical, physical, mechanical thermal properties. In addition, stability during 28 days storage (presence absence light; with...

Acetylation and oxidation are chemical modifications which alter the properties of starch. The degree modification acetylated oxidized starches is dependent on catalyst active chlorine concentrations, respectively. objective this study was to evaluate effect acetylation structural, morphological, physical–chemical, thermal pasting barley Barley were at different levels (11%, 17%, 23% NaOH solution) sodium hypochlorite concentrations (1.0%, 1.5%, 2.0% chlorine). Fourier-transformed infrared...

The high-, medium-, and low-amylose rice starches were isolated by the alkaline method acetylated using acetic anhydride for 10, 30, 90 min of reaction. degree substitution (DS), Fourier-transformed infrared spectroscopy (FTIR), X-ray diffractograms, thermal, morphological, pasting properties, swelling power solubility native evaluated. DS starch was higher than medium- high-amylose starches. introduction acetyl groups confirmed FTIR spectroscopy. acetylation treatment reduced crystallinity,...

The commercial cellulose fibers and extracted from rice oat husks were analyzed by chemical composition, morphology, functional groups, crystallinity thermal properties. used to produce hydrogels with poly (vinyl alcohol). presented different structural, crystallinity, properties, depending on the source. hydrogel had a network structure similar agglomeration sponge, more homogeneous pores compared fibers. prepared showed water absorption capacity of 141.6-392.1% high opacity. highest...

Gelatinization and retrogradation, influenced by amylose amylopectin ratio, are important characteristics for starch hydrogels elaboration. The objective of this study was to evaluate the influence content gelatinization method on physicochemical native cross-linked rice hydrogels. starches were gelatinized with heating or alkaline solution, added polyvinyl alcohol, frozen then freeze-dried. had a low final viscosity (101.38 RVU), which made heat-induced hydrogel readily disintegrated in...

Black bean protein hydrolysates obtained from pepsin and alcalase digestions until 120min of hydrolysis were evaluated by gel electrophoresis, relative fluorescence intensity, emulsifying properties, light micrograph emulsions in vitro antioxidant activity. The emulsion stability the during 30days storage. pepsin-treated presented higher degree than alcalase-treated hydrolysates. showed surface hydrophobicity. Moreover, with digestion 30-days those digestion. concentrate especially had good...

The effect of heat-moisture treatment (HMT) on the properties rice starches with high-, medium- and low-amylose content was investigated. were adjusted to 15%, 20% 25% moisture levels, heated at 110 °C for 1 h. swelling power, solubility, pasting properties, morphology, enzymatic susceptibility X-ray crystallinity evaluated. HMT reduced power solubility starches. strongest occurred high-amylose starch; temperature increased peak viscosity, breakdown, final viscosity setback reduced. starch's...

This study investigated the effects of sodium hypochlorite oxidation and a heat-moisture treatment potato starch on physicochemical, pasting textural properties starches in addition to water vapour permeability (WVP) mechanical films produced from these starches. The carbonyl contents, carboxyl swelling power, solubility, gel texture native, oxidised treated (HMT) were evaluated. made HMT characterised by thickness, colour, opacity, WVP. had lower viscosity power compared native starch....

The effects of single and dual heat-moisture treatment (HMT) rice, cassava pinhão starches at 100 °C 120 were investigated. adjusted to 22% w.b. moisture content subjected HMT (autoclaved for 2 h) or (after being autoclaved 1 h, the material was allowed stand 24 h again more h). Starch crystallinity, solubility, swelling power, thermal properties, pasting gel hardness evaluated. temperature variation affected starch properties than HMT. most applicable food applications, where low viscosity...

The objective of this study was to evaluate the effects oxidation with sodium hypochlorite at different concentrations active chlorine (0.5, 1.0 and 1.5 g/100 g) on physicochemical, morphological, pasting, thermal gel texture properties potato starch. native oxidized starches were used in (3.0, 4.0 5.0 g starch/100 mL) for preparation biodegradable films using glycerol as plasticizer. evaluated their mechanical properties, color, water solubility permeability vapor. degree more intense there...

The effect of bean starch oxidation at different active chlorine concentrations (0.5%, 1.0% and 1.5%) on the physicochemical, crystallinity, pasting morphological properties was investigated. carbonyl content, carboxyl colour, swelling power, solubility, gel hardness, X-ray properties, gelatinisation characteristics morphology starches were evaluated. oxidised with 0.5% had characteristic a slightly crosslinked starch. As compared to native chlorine-oxidised starches, 1.5% increased content...

Biodegradable films from native or acetylated starches with different amylose levels were prepared. The characterized according to the mechanical, water vapor barrier, thermal, and biodegradability properties. high had higher moisture content solubility than starch film. However, acetylation did not affect acid of films, regardless content. Films made medium rice obtained; however low starches, whether acetylated, form desirable characteristics. decreased tensile strength increased...

The aim of this study was to produce ultrafine fibers from zein incorporated with a complex eucalyptus essential oil (EEO) and β-cyclodextrin (β-CD) antimicrobial properties by electrospinning technique. EEO characterized chemical composition tests against three Gram positive four negative bacteria. inclusion (IC) prepared β-CD co-precipitation technique added at different concentrations in polymer solution using aqueous ethanol as solvent. morphology, thermal properties, functional groups,...

The ultrafine fibers were produced using a polymeric blend of soy protein isolate (SPI), polyethylene oxide (PEO), and zein at ratio 1:1:1 (v/v/v) by electrospinning. ginger essential oil (GEO) was encapsulated in the morphology, Fourier-Transform Infrared Spectroscopy (FTIR) analysis, thermal properties relative crystallinity evaluated. antimicrobial activity evaluated against five bacteria (Listeria monocytogenes, Staphylococcus aureus, Escherichia coli 0157:H7, Salmonella typhimurium,...

Ozone is a more powerful oxidant than common oxidising agents, such as sodium hypochlorite and hydrogen peroxide. It considered safer starch modification method for both consumers the environment. However, few studies have investigated changes in properties associated with ozone treatment, particularly when applied aqueous solution. This work aimed to evaluate carbonyl carboxyl contents, X-ray diffraction patterns, spectrum profiles of Fourier transform infrared spectroscopy, pasting surface...

In this study, a method was developed to encapsulated carvacrol in nanofibers from soluble potato starch. The added starch solutions at various concentrations (0, 20, 30 and 40% v/v) electrospun into fibers. morphology, size distribution, thermal stability, FT-IR spectra, relative crystallinity (RC) antioxidant of the fibers were analyzed. For mechanical properties antimicrobial activities evaluation nonwovens obtain. carvacrol-loaded showed homogeneous morphology average diameters ranging...

The objective of this study was to evaluate the effects acid and oxidation modifications on sorghum starch, as well effect dual modification starch physical, morphological, mechanical, barrier properties biodegradable films. performed with 3% lactic 1.5% active chlorine. For modification, first, followed by under same conditions above. Both films oxidized starches, single dual, had increased stiffness, providing a higher tensile strength lower elongation when compared based native modified...