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...

Carrageenan-based active packaging film was prepared by adding olive leaf extract (OLE) as a bioactive agent to the lamb meat packaging. The OLE characterized in terms of its phenolic compounds (T.ph), antioxidant activity (AA), oleuropein, and minimum inhibitory concentration (MIC) against Escherichia coli. film’s formulation consisted carrageenan, glycerol plasticizer, water solvent, OLE. effects on thickness, vapor permeability (WVP), tensile strength (TS), elongation at break (EB),...

Abstract This research focused on the development of carrageenan based biodegradable films incorporated with olive leaves extract (OLE). OLE microbial inhibition and its total phenolics (TP) were evaluated. Carrageenan produced by casting technique characterized thickness, water vapor permeability (WVP), color, mechanical properties, infrared spectroscopy. In order to apply as lamb meat packaging, antimicrobial effect was investigated. Results showed that inhibited E. coli growth presented...

The moisture equilibrium isotherms of chitosan were determined at 20, 30, 40, 50 and 60 °C, using the gravimetric static method. Experimental data analyzed by GAB, Oswin, Halsey Smith equations. Isosteric heat differential entropy sorption from GAB model Clausius-Clapeyron Gibbs-Helmholtz equations, pore size distribution was calculated Kelvin Oswin equations showed best fit to experimental with R2 ≈ 99% low mean relative deviation values (E% < 10%). Monolayer content (from 0.12 0.20 kg...

ABSTRACT The thermomechanical degradation and thermostabilization of poly(lactic acid) (PLA) have been studied using subsequent extrusion cycles under different temperature profiles. Primary secondary antioxidants were used to avoid process during extrusion. Melt flow index (MFI), size exclusion chromatography (SEC), infrared spectroscopy (FTIR) analysis evaluate the stabilization PLA. MFI SEC show that main thermodegradation mechanism PLA is governed by scission reactions. FTIR confirmed...

This research focused on the development of active and intelligent films based a carrageenan biopolymer incorporated with jaboticaba peels extract (JPE). The bioactive was obtained by maceration extraction showed high concentrations total phenolic content (TP), anthocyanin (TA), cyanidin-3-glucoside (Cn-3-Glu), antioxidant activity (AA), microbial inhibition (MI) against E. coli, being promising for use as natural additive in food packaging. were produced using casting technique,...

The objective of this work was to develop a chitosan/agar-agar bioplastic film incorporated with bacteriocin that presents active potential when used as food packaging. formulation the solution determined from an experimental design, through optimization using desirability function. After establishing concentrations biopolymers and plasticizer, purified extract Lactobacillus sakei added, which acts antibacterial agent. films were characterized physical, chemical, mechanical, barrier,...

ABSTRACT The aim of this work was to study the drying Spirulina platensis , evaluating final product characteristics about its phycocyanin content and protein solubility in water. Two techniques were used: spouted bed thin layer. For a bed, cone‐cylindrical geometry chosen, namely type conventional (CSB) jet‐spouted with paste concentration 5%. thin‐layer performed at temperatures 50 60C, load material 4 kg/m 2 tray. dryer CSB demonstrated good functionality, not presenting collapse during...

This research investigated the bioactive potential of jaboticaba peel extract (JPE) and proposed an innovative material for food packaging based on carrageenan films incorporated with JPE. The was obtained through microwave assisted extraction (MAE) according to central composite rotational design optimized conditions showed a combined antimicrobial antioxidant actions when process is accomplished at 80 °C 1 min. film JPE manageable, homogeneous presence into increased thickness improved...

The proposal of this work was the preparation and characterization activated carbons obtained from water treatment plant sludge (WTS) to apply as adsorbents in removal organic dye contaminants wastewater. were produced with a combination chemical activation pyrolysis processes. textural characteristics both presented satisfactory superficial area mesoporous structure. presence phenolic carboxylic groups surface indicated better adsorption cationic adsorbates. When applied methylene blue (MB)...

Summary The moisture equilibrium isotherms of garlic and apple were determined at 50, 60 70 °C using the gravimetric static method. experimental data analysed GAB, BET, Henderson–Thompson Oswin equations. isosteric heat differential entropy desorption by applying Clausius–Clapeyron Gibbs–Helmholtz equations, respectively. GAB equation showed best fitting to ( R 2 &gt; 99% E % &lt; 10%). monolayer content values for higher than those studied temperatures; varied from 0.050 0.056 0.107 0.168...

The lack of adequate treatment for the removal pollutants from domestic, hospital and industrial effluents has caused great environmental concern. Therefore, there is a need to develop materials that have capacity treat these effluents. This work aims characterize an activated charcoal olive pomace, which agro-industrial residue, adsorption Nimesulide in liquid effluent evaluate kinetics equilibrium using experimental design. raw material was oven dried at 105 °C 24 h, ground, chemically...

In the search for new biodegradable materials and greater microbiological safety stability of perishable food products, this study aimed to develop a bioplastic antibacterial film incorporating bacteriocin application in commercial curd cheese monitoring stability. Films with good handling characteristics as well physical, barrier, mechanical properties were obtained. Regarding activity, microbial reduction was demonstrated matrix, obtaining 3 logarithmic cycles group coagulase positive...