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BackgroundThere is increasing demand from consumers for more natural foods with potential health benefits. The marine environment is an abundant source of potentially health-promoting substances like bioactive peptides, polyunsaturated fats, photosynthetic pigments, antioxidants, and antimicrobials. The application of these substances in the food and pharmaceutical industries is often limited by their low water-solubility, poor oral bioavailability, adverse food matrix interactions, and undesirable impact on sensory attributes. Nano-scaled delivery systems have been developed to address many of these challenges.Scope and approachIn this article, a review of the current understanding of nanostructured delivery vehicles for hydrophobic marine
For the improvement of the probiotics’ viability, a novel nanofiber mats consisting of chitosan (CS)/poly(vinyl alcohol) (PVA) loaded with the probiotic Bifidobacterium animalis subsp. lactis Bb12 and inulin (INU) as a prebiotic were fabricated via electrospinning approach. Scanning electron microscopy revealed that cells were well encapsulated in nanofibers with a diameter ranging from 117.5 ? 70.6 to 217.6 ? 62.7 nm and fluorescence microscopy images also revealed the viability of bacteria. Thermal analysis of fibrous mats proposed potential use of them in heat-treated foods owing to high melting temperatures (> 200 ?C). Moreover, in comparison to free cells, the survivability of cells especially enclosed in CS/PVA/INU elect
This study deals with the preparation of a green nanocomposite coating based on polyurethane containing nickel oxide, MnxFe3-xO4 (x?=?0.5, 1, and 1.5) and polyaniline nanoparticles for electromagnetic wave absorption. Polyurethane nanocomposites were successfully synthesized from a vegetable polyol based on epoxidized soybean oil and methylene diphenyl diisocyanate (MDI). X-ray diffractometer (XRD), scanning electron microscope, (SEM) and energy dispersive X-ray spectrometer (EDS), were utilized to the characterization of the phase structures, morphologies, particle size and chemical composition of the compounds, respectively. A vector network analyzer (VNA) in X-band frequency range was used to study microwave absorbing properties of the p
This work studies microwave absorption properties of the polyester composite containing the nanoparticles of Ca3Al2Si3O12/polyaniline/(Cu, Mg, and Ni) spinel ferrite. For this purpose, the nanoparticles were firstly prepared using clear methods. Then, the synthesized nanoparticles were placed into a polyester matrix. The structural characteristics of the synthesized nanocomposites have been investigated by X-ray diffractometer (XRD) and scanning electron microscope (SEM). Fourier-transform infrared spectroscopy (FT-IR) was used to determine functional groups in the synthesized nanoparticles. Besides, microwave absorption performance has been examined by a vector network analysis (VNA) in the frequency domain of 8–12?GHz. The experimental
To enhance the physicochemical stability of ω-3 PUFAs concentrates from fish oil, biopolymer coating based on chitosan (CH) and gelatin (GE) deposited on the surface of nanoliposomes (NLs) has been synthesized and characterized. The mean particle size of surface-decorated nanoliposomes (SDNLs) containing ω-3 PUFAs concentrates was found to be in the range of 209.5-454.3 nm. Scanning and transmission electron microscopy revealed the spherical shape and smooth surface of the nanovesicles. Fourier-transform infrared spectroscopy and X-ray diffraction observations confirmed that the NLs have been successfully coated by biopolymeric blends. The highest entrapment efficiency of 81.6% was obtained in polymer-stabilized NLs with a concentration r
There is increasing demand from consumers for healthier and more sustainable foods. The marine biosphere is a rich source of health-promoting substances like bioactive peptides, polysaccharides, polyunsaturated lipids, carotenoids, polyphenolic compounds, minerals, saponins, and phytosterols. These substances display a myriad of potentially beneficial biological functions including antioxidant, antimicrobial, anticancer, anti-diabetic, anti-obesity, anti-Alzheimer, anti-fibrotic, neuroprotective, sleep-enhancing, lipid-lowering, wound healing, and skin protection activities. This review provides an update on recent research on bioactive ingredients derived from aquatic sources and highlights their potential application in the f
Biofunctional quadripartite films were developed by adding trans-Cinnamaldehyde (CIN) (0.4, 0.8, and 1.6% w/v) into chitosan (CH)/poly(vinyl alcohol) (PVA)/fish gelatin (FG) matrices. Rheological data revealed that all solutions exhibited shear-thinning and typical entangle polymers solutions behavior. Mechanical results showed that the incorporation of CIN caused a significant increase (p?0.05) in tensile strength, while a significant decrease was observed in elongation-at-break. With increasing CIN content, the WVP of the films, which were in the range of 0.785–0.995?g?mm/kPa h m2, increased to some extent, whereas the water solubility and water absorption were reduced up to 47 and 87%, respectively. Moreover, water contact angle anal
Amino acid profiles, functionality, and antioxidative potential of orangefin ponyfish (Photopectoralis bindus) protein hydrolysates, using 1% alcalase, with diverse hydrolysis times (1, 2, 3 and 4 h), were evaluated. The samples solubility in the pH range of 3-9, emulsifying and foaming properties at various protein contents (2.5, 5 and 10 mg/mL), as well as the scavenging of DPPH, ABTS free radicals and reducing power (at concentrations of 1-5 mg/mL), were studied. The amino acid profile of orangefin ponyfish was used to estimate nutritional value. A high amount of essential amino acids (35%) involved in protein hydrolysates and Glx, Asx, and Gly were the dominant amino acids. Solubility was above 90% in the pH range 3-9 and increased at a
The present study was conducted to compare the effect of adding cinamaldehyde in two forms i.e. free 1.6% v/v and nanoencapsulated 0.375% w/w on the properties of biodegradable film based on chitosan/polyvinyl alcohol/fish gelatin, and then it’s potential on shelf-life extension of chilled rainbow trout Oncorhynchus mykiss fillets at cold temperature. The results showed that the addition of free and nanoencapsulated cinnamaldehyde contributes to the increase of water vapor permeability WVP, as well as scanning electron microscopy SEM images revealed remarkable differences in the surface morphology between pure films and films containing free and encapsulated cinemaldehyde. In the second phase of the present study, the antioxidant/antimicr
Electrospun chitosan/poly(vinyl alcohol) (CS/PVA) fibrous mats encapsulating fish-purified antioxidant peptide (AOP) were successfully fabricated under the optimal conditions (flow rate = 0.2 mL/h, applied voltage = 15 kV, and tip-to-collector distance = 15 cm). The AOP-loaded electrospun fibers displayed uniform and bead-free nanostructures with fiber diameter ranging from 157.9 ? 28.8 to 195.5 ? 34.4 nm, indicating the miscibility of CS and PVA polymers in nanoscale. Atomic force microscopy revealed the dense fibrous nature of the mats, with surface roughness ranging from 180.6 to 279.1 nm. Fourier transform infrared spectroscopy and X-ray diffraction analyses demonstrated the molecular interaction between co
Films with appropriate mechanical properties and low permeability are very important for food packages. The aim of this research was to develop and characterize the ternary films made from chitosan (CH), poly(vinyl alcohol) (PVA), and fish gelatin (FG) at different blend compositions (50/50/0, 40/40/20, 35/35/30, 30/30/40, and 25/25/50, CH/PVA/FG) via a simple casting method. Stress-strain curves showed that the incorporation of 20% FG into the films made them tougher as well as making them more elastic; optimum ternary films were obtained using CH/PVA/FG ratio of 40/40/20, giving maximum values of TS and EAB as 41.93 ? 3.24 MPa and 133.13 ? 13.23%, respectively. The water vapor permeability (WVP) values of the ternary films were
Development of antimicrobial electrospun nanofibrous mats is one of the most recent trends in the field of food biopackaging. Herein, novel antimicrobial fibrous mats consisting of blend electrospun chitosan (CS)/poly(ε-caprolactone) (PCL) embedded with oregano essential oil (OEO) were fabricated via electrospinning approach and investigated. FE-SEM manifested that as-spun fibers were well-oriented with uniform diameters along their lengths, and AFM displayed the dense nature of the fibrous mats, with surface roughness in the range of 62.9 to 84.6 nm. The physical interactions and hydrogen bonding between CS/PCL and OEO were verified by FTIR. This novel hybrid mat demonstrated excellent mechanical strength of 14.0 MPa and achieved good
Cinnamaldehyde (CIN), a well‐known botanical active compound but with low aqueous solubility and susceptible to degradation by oxidation reactions, was entrapped in monodispersed nanoparticles (NPs) that were assembled from chitosan (CS) and tripolyphosphate (TPP). Scanning electron microscopy/atomic force microscopy images declared the uniformed spherical shape of NPs with a size range of 60–80?nm, respectively. The ζ‐potential of the particles were observed to be positive (4.01 to?10.40?mV). Based on FT‐IR spectroscopy results, the electrostatic interactions between the active agent and CS/TPP were regarded as a motive for the formation of CIN‐encapsulated NPs. Thermal stability of the particles entrapping CIN compared with t
Background and objectives: Ponyfish (Leiognathus bindus) includes 54. 77% of by-catch in the Mahshahr creeks that has no commercial value due to its small size. So, the production of value-added products, such as protein hydrolysates with high nutritional value could pave the way for full use of this species. By applying enzyme technology for protein recovery in the fish processing, it may be possible to produce a broad spectrum of food ingredients or industrial products for a wide range of applications. Use of proteolytic enzymes is an interesting technique for improving the functional properties of food proteins without losing their nutritional value. The functional properties of fish protein hydrolysate are important, particularly if the
The present study evaluated the effect of packagin g (air, vacuum) with or without addition of sodium acetate (2% W /V) on shelf-life extension of rainbow trout ( Oncorhynchus mykiss ) under refrigeration, for a period of 18 days. Fou r different treatments were tested: CAP: control air pack; SAAP : sodium acetate treated aerobic packaging; VP: vacuum packaging in the absence of s odium acetate; and SAVP, sodium acetate under VP. Trimethylamine nitrogen (TMA-N), free fatty acids (FFA) and peroxide values (PV) of SAVP samples were lower com pared to the other treatments during the entire refrigerated storage period. In t he present study, th