Effects of chitosan coatings incorporating with free or nano-encapsulated Satureja plant essential oil on quality characteristics of lamb meat

Lipid-based nanocarriers loaded with bioactive compounds in active food packaging: Fabrication, characterization, and applications

New trends in the food industry emphasize safer, more stable, eco-friendly, and value-added packaging solutions. Active packaging has emerged to release or absorb bioactive components, which are often sensitive to physical, chemical and/or enzymatic factors as well as being unstable. Lipid-based nanocarriers (nanoemulsions, nanoliposomes, solid lipid nanoparticles and nanostructured lipid carriers) have demonstrated their industrial potential and efficiency in the uptake, protection, bioavailability and controlled/targeted release of a wide variety of water-soluble, fat-soluble or amphiphilic bioactive substances. Additionally, their reduced size and consequently, high surface-to-volume ratio, give them unique physicochemical attributes, novel characteristics in the final product and biocompatibility as well as adhesion strength with the food packaging, without altering the sensory attributes of the food. Despite these benefits, challenges related to stability, regulatory concerns, and large-scale production must be addressed. This review examines the fabrication, characterization, and application of lipid-based nanocarriers in active food packaging, emphasizing their benefits, challenges, and future potential while further exploring their successful integration into the food packaging industry.

Effect of hydrogen-producing magnesium-incorporated edible coating on Metabolomic and Volatilomic of beef meatballs

Meat products are highly perishable and have a short shelf life. The effects of using a molecular hydrogen-producing magnesium-incorporated coating (H2-P-Mg) on the color, pHysicochemical properties, deterioration, biogenic amines, free amino acid profile, and volatilomic profile of beef meatballs were evaluated. The meatballs were coated with different films as follows: group A (uncoated), group B (whey protein coating), group C (whey protein coating +7 % thyme extract), group D (whey protein coating +7 % thyme extract + Mg), and group E (whey protein coating + Mg). At the end of storage, group E samples showed higher color scores and lower pH (5.89) and Eh7 (+260 mV) values. At the end of storage, the H2-P-Mg coating (groups D and E) showed an inhibitory effect on TBARS (58-64 %) and biogenic amines (15.38-25.87 %). The concentrations of putrescine, histamine, cadaverine, and tyramine were reduced by about 15, 20, 22, and 26 % in Mg-coated samples compared to the control. Group E showed higher levels of histidine, tyrosine, and lysine. Group D had the lowest levels of ketones and aldehydes. The use of H2-P-Mg as an edible coating can bring numerous nutritional, safety, and technological benefits to meat technology.

Ultrasound triggered process optimization of Etlingera linguiformis (Roxb.) R.M.Sm. nanoemulsion: Its stability, cytotoxicity and antibacterial activity

Periodontal infections and dental caries are leading causes of tooth loss, impacting overall health and quality of life. Conventional treatments involve antibiotics, antiamoebic drugs, and quaternary ammonium compounds, their prolonged use can cause resistance and toxicity. In this study, E. linguiformis essential oil (ELEO) was evaluated for chemical composition, and its nanoemulsion (ELEON) with good stability was characterized for ELEON properties, prepared using ultrasonication, and assessed for their antibacterial efficacy. The results showed that ELEO is dominated by estragole as the major compound, with the 60-minute sonicated sample exhibiting the best stability and uniform droplet size (220.03 d.nm) distribution. Prolonged ultrasonication led to an increase in particle size, highlighting the importance of optimal processing. Antibacterial analysis revealed that ELEON exhibited higher activity than ELEO against S. mutans and S. aureus, attributed to its smaller droplet size and enhanced penetration into microbial cells. Transmission Electron Microscope (TEM) showed the droplet diameter comparable to the particle size measured in Dynamic light scattering (DLS). Scanning Electron Microscopy (SEM) revealed significant morphological changes and membrane disruption in bacteria treated with ELEO and ELEON, leading to cell death. The cytotoxicity of ELEO and ELEON from E. linguiformis rhizomes was evaluated on L929 fibroblast cell lines using the MTT assay, showing no significant reduction in cell viability across tested concentrations. ELEON enhances essential oil stability and antimicrobial efficacy, demonstrating thepotential for pharmaceutical applications and antibiotic resistance management.

Effects of hot air drying on muscle quality, volatile flavor compounds, and lipid profiles in sword prawn (Parapenaeopsis hardwickii) based on physicochemical, GC-IMS, and UHPLC-MS/MS-based lipidomics analysis

The changes in physicochemical index, volatile flavor, and lipid profiles in Parapenaeopsis hardwickii during hot air drying were studied. As drying time progressed, the L*, hardness, chewiness, gumminess, peroxide value (PV), and thiobarbituric acid reactive substances (TBARS) of P. hardwickii increased gradually, while the a* and b* values first increased and then decreased, and springness decreased progressively. Hot air drying caused the myofibrils to widen and become disordered. Additionally, 5 volatile organic compounds (VOCs) and 30 lipid molecules were identified as key differential markers to the flavor and lipid profiles, respectively. Pearson correlation analysis revealed a strong relationship between shrimp muscle quality and lipid oxidation, with lipid oxidation promoting the development of characteristic flavors and an increase in their levels. Lysophosphatidylethanolamine (LPE), specifically 20:2e, 18:2e, 18:1e, and 16:1e, were identified as primary lipids contributing to the formation of these characteristic flavor differential markers during hot air drying. Glycerophospholipids (GPs) containing LPE as key substrates driving flavor formation in shrimp during hot air drying. This study offers a comprehensive theoretical framework for controlling flavor quality in shrimp muscle during hot air drying.

Enhancing oxidative stability and sensory properties of ostrich meat using Malva neglecta mucilage nanocomposite coating loaded with Myrtus communis essential oil during refrigeration

Ostrich meat has a favorable nutritional profile but is susceptible to oxidative deterioration due to its high prooxidants. This study aimed to assess the effects of edible coatings made from Malva neglecta mucilage (MLM) including Myrtus communis essential oil (MEO), in both conventional and nanocomposite (nanoclay-based) forms on the oxidative stability and sensory characteristics of ostrich meat during 21-day storage at 4 °C. Samples coated with nanocomposite MLM containing 8 % MEO (NMLM-MEO 8 %) showed significantly lower pH (6.19), peroxide value (1.67 meq/kg lipid), thiobarbituric acid reactive substances index (1.11 mg MDA/kg), and carbonyl content (1.74 nmol/mg protein), alongside higher phenolic content (3.51 mg GAE/g meat) and overall acceptability score (4.6) compared to other groups (P ≤ 0.05). These findings demonstrate the potential of NMLM-MEO 8 % coating containing natural antioxidants as effective active packaging material, providing oxidative protection and sensory improvement in ostrich meat, while offering a sustainable alternative for the meat packaging industry.

Investigating the inhibitory effect of nettle (Urtica dioica L.) essential oil and Pickering nanoemulsion on some pathogenic bacteria inoculated into pizza cheese

The aim of the present research was to evaluate the effect of Urtica dioica L. (nettle) essential oil (in the forms of Pickering nanoemulsion (NEO) and free (EO)) on microbial, chemical and sensory changes of pizza cheese stored at 4 °C for 12 days. For this purpose, Escherichia coli and Listeria monocytogenes were inoculated into pizza cheese. In all tests, the control group had the lowest score after 12 days of storage. In the antimicrobial assay test in different treatments, NEO4% treatment decreased the growth of E.coli from 4 (0th day) to 3.3 log CFU/g (12th day) and the growth of L. monocytogenes from 3.8 (0th day) to 3.1 log CFU/g (12th day). The minimum inhibitory concentration (MIC) of NEO and EO for E.coli and L. monocytogenes was 0.62 ± 0.01 mg/mL. Additionally, the minimum bactericidal concentration (MBC) of EO and NEO for E. coli was 25 ± 0.1 mg/mL, and for L. monocytogenes was 1.25 ± 0.1 mg/mL. At day 12, almost all treatments (free form and nano) had relatively similar pH. In our study, the minimum and maximum value of DPPH was detected in the treatment of NEO1% (31.25 ± 1.50 %) and BHT200 (96.40 ± 2.5 %), respectively. Also, on the 12th day of the test, the NEO treatment obtained the highest score in all sensory tests (appearance & color, body & texture, odor and overall acceptability). According to the findings of the present study, Pickering emulsion form of nettle EO increases the storage period of pizza cheese.

The Coating Effect of Persian Gum (Zedo Gum) Containing Lactobacillus sakei on the Beef Quality Parameters During Storage at Refrigerator Temperature

Coatings with antibacterial properties, integrated with biological agents, offer a novel and promising strategy for preserving meat products. This study investigates the effect of Persian gum (PG) coating containing Lactobacillus sakei bacteria on beef quality during refrigerated storage. Beef loin pieces were divided into five groups (control, 1% PG, 2% PG, and 1% and 2% PG with L. sakei bacteria). The groups were evaluated for microbial, chemical, and sensory tests at specific periods (days 0, 2, 4, 6, and 8). The results of the microbial analysis (the mean LAB count) revealed that the quality of meat significantly (p < 0.05) improved in the presence of L. sakei coatings, ranging from 6.08 to 7.31 log10 CFU/g in different treatment groups at the end of the experiment. Additionally, coatings containing L. sakei significantly (p < 0.05) reduced the microbial counts of mesophilic, psychrophilic, and Enterobacteriaceae bacteria, resulting in an extended shelf life of at least 8 days. The chemical findings indicated that increases in pH values (ranging from 5.98 to 6.57), total volatile basic nitrogen (TVB-N) levels (from 18.30 to 32.33 mg N/g), thiobarbituric acid reactive substances (TBARs) (from 2.16 to 4.12 mg MDA/kg), and protein carbonyl (PC) concentrations (from 1.33 to 2.05 nmol/mg protein) during storage at 4°C were ranked as follows: PG 2% + L. sakei < PG 1% + L. sakei < PG 2% < PG 1% < control. Additionally, overall acceptability, texture, odor, and color were significantly higher in the groups coated with L. sakei than in other groups. Based on the results, the groups covered with PG and L. sakei indicated that the quality and safety of beef increased and extended the shelf life of meat. In conclusion, PG solution containing L. sakei bacteria can be recommended as a new method for beef packaging.

Impacts of chitosan/pullulan/carvacrol film on the quality and microbial diversity of refrigerated goat meat

In this study, our previously prepared chitosan/pullulan film (CS/PU) and chitosan/pullulan/carvacrol film (CS/PU/CAR) were applied to goat meat preservation, the dynamic changes in quality and microbial communities of goat meat during chilled storage (4 °C) were investigated, and the fresh-keeping effects of the two biodegradable antibacterial films on goat meat were comprehensively evaluated. The results showed that when the goat meat was wrapped with CS/PU or CS/PU/CAR films during chilled storage, the total plate count and total volatile basic nitrogen (TVB-N) could be inhibited significantly, but the CS/PU/CAR film has a better fresh-keeping effect. Furthermore, during the chilled storage of goat meat, CS/PU/CAR film also could inhibit the production of alcohol compounds and the growth of Pseudomonas spp., thereby slowing down the meat's deterioration and extending the goat meat's shelf life to about 13 days. This study can provide a reference for the application of active packaging film of fresh goat meat.

Synergistic inactivation effect and mechanism of ultrasound combined with Zanthoxylum schinifolium essential oil nanoemulsions against Escherichia coli O157:H7 and its application on fresh-cut cucumber

Fresh-cut produce is often contaminated with Escherichia coli O157, posing a significant risk to public health. This study investigated the synergistic inactivation effect and underlying mechanism of ultrasound (US) combined with Zanthoxylum schinifolium essential oil nanoemulsion (ZEO-NE) against E. coli O157:H7, and explored its potential application in fresh-cut cucumbers. The results demonstrated that combined treatment of US and ZEO-NE significantly reduced the viable counts of E. coli O157:H7 compared to treatment with US or ZEO-NE alone. In particular, US (20 kHz, 345 W/cm2) + ZEO-NE (1.0 mg/mL) treatment for 12 min achieved an 8.91 log colony-forming units (CFU)/mL reduction in viable counts of E. coli O157:H7. Moreover, biofilm formation assay revealed that US+EO-NE treatment significantly reduced mobility, altered surface properties, and inhibited biofilm formation of E. coli O157:H7 cells compared to single treatments. The synergistic inactivation mechanism of US+ZEO-NE treatment against E. coli O157:H7 was revealed to involve increased cell membrane permeability, resulting in leakage of nucleic acids, proteins, and LDH, AKP, and ATP, disruption of cell membrane integrity, and alterations in membrane potential. Additionally, the US+ZEO-NE treatment induced reactive oxygen species accumulation and disrupted cell morphology, ultimately leading to E. coli O157:H7 cell death. Notably, the US+EO-NE treatment also significantly reduced the E. coli O15:H7 counts in fresh-cut cucumbers compared to single treatments, without adversely affecting the quality and sensory properties of the produce during storage at 4 °C for 12 days. Overall, these findings suggest that US+EO-NE is a promising technique for bacterial inactivation, and holds potential for improving microbial safety in fresh-cut produce.

Tapioca starch/konjac gum-based composite film incorporated with nanoliposomes encapsulated grape seed oil: Structure, functionality, controlled release and its preservation role for chilled mutton

In this study, grape seed oil nanoliposomes (GSO-NLs) were constructed and doped into tapioca starch/konjac gum composite films (TK-GSO-NLs) to evaluate the preservation of chilled mutton. The results showed that the GSO-NLs have a good spherical or rounded state and good stability. The doping of GSO-NLs resulted in a smooth, flat, and dense structure on the surface and cross-section of the TK films. The TK-GSO-NLs showed the best compatibility among the components, with excellent mechanical and barrier properties. FTIR and XRD confirmed the presence of ionic bonds between the components, further improving the copolymer crystal structure. Notably, the packaging material provided ideal antioxidant and bacteriostatic stability as well as delayed GSO release. This packaging could effectively maintain the quality of chilled mutton and prolong the shelf-life to 15 days. The study provides ideas for the design of green and active food packaging and for extending the shelf life of meat.

The application of dietary fibre as microcapsule wall material in food processing

In the food industry, functional ingredients derived from active substances of natural sources and microbiological resources are gaining acceptance and demand due to their beneficial health properties. However, the inherent instability of these constituents poses a challenge in utilizing their functional properties. Microencapsulation with dietary fibre as wall material technology offers a promising solution, providing convenient manipulability and effective safeguarding of encapsulated substances. This paper presents a comprehensive overview of the current state of research on dietary fibre-based microcapsules in food processing. It examines their functional attributes, the preparation technology, and their applications within the food industry. Furthermore, the constraints associated with industrial production are discussed, as well as potential future developments. This article offers researchers a reference point and a theoretical basis for the selection of innovative food ingredients, the high-value utilisation of dietary fibre, and the design of conservation strategies for functional substances in food production.

Enhancing Beef Hamburger Quality: A Comprehensive Review of Quality Parameters, Preservatives, and Nanoencapsulation Technologies of Essential and Edible Oils

Essential and edible oils have applications in reducing oxidative processes and inhibiting the growth of microorganisms in meats and their derivatives, providing a natural alternative to synthetic preservatives. This preservative action meets the demand for clean labels and safe products, aiming to replace synthetic additives that pose potential health risks. Advances and limitations in applying essential and edible oils in meat preservation, highlighting their preservative properties or ability to improve nutritional profiles, are explored in this study. Despite the benefits, the direct application of oils faces limitations such as low solubility and sensory impact, which can be overcome by nanotechnology, including association with biopolymeric matrices, focusing on the protection of bioactive compounds and enhancing the functionality of natural oils in food systems. This approach is essential for innovation in food preservation, promoting safety and sustainability in the meat sector, and following consumer expectations and food safety guidelines. Studies suggest that by combining the functional benefits of essential and edible oils associated with nanotechnology, there can be significant contributions to innovation and sustainability in the meat sector, promoting natural preservation and meeting market regulations and expectations.

Variation of nanoparticles in pickering emulsion optimize the physical, control-release and sustained antioxidant properties of hydroxypropyl methylcellulose based microporous film

The proper encapsulation of liposoluble tea polyphenols (LTP) is expected to better protect oil system. Chitosan hydrochloride-carboxymethyl starch (CHC-CMS) nanoparticles-based Pickering emulsions and hydroxypropyl methylcellulose/sodium citrate (HPMC/SC) microporous film were combined to embed and control-release LTP. With the CHC:CMS ratio varied from 1:0.5 to 1:2, the average size of LTP droplets of Pickering emulsion increased from 6.0 μm to 8.5 μm, the average area of cross-sectional pores of functional films increased from 1.78 μm2 to 3.22 μm2, the water vapor permeability of functional films increased from 2.02 × 10-10 to 2.44 × 10-10 g·mm-1·s-1·Pa-1, the light transmittance and the quantity of cross-sectional pores decreased. The release ratio first increased (<24 days) and then remained stable (≥24 days), the stable release ratio was positively correlated with the size of the emulsion droplets in the emulsion and the size of cross-sectional pores in the film. Functional films had better protection effect on oil than free LTP during later storage period (≥32 days), among which, functional film containing CHC-CMS 1:2 showed optimal sustained antioxidant effect on Perilla seed oil, which corresponded well to its highest stable release ratio.

Waste to wealth: Polyhydroxyalkanoates (PHA) production from food waste for a sustainable packaging paradigm

The growing demand for sustainable food packaging and the increasing concerns regarding environmental pollution have driven interest in biodegradable materials. This paper presents an in-depth review of the production of Polyhydroxyalkanoates (PHA), a biodegradable polymer, from food waste. PHA-based bioplastics, particularly when derived from low-cost carbon sources such as volatile fatty acids (VFAs) and waste oils, offer a promising solution for reducing plastic waste and enhancing food packaging sustainability. Through optimization of microbial fermentation processes, PHA production can achieve significant efficiency improvements, with yields reaching up to 87 % PHA content under ideal conditions. This review highlights the technical advancements in using PHA for food packaging, emphasizing its biodegradability, biocompatibility, and potential to serve as a biodegradable alternative to petroleum-based plastics. However, challenges such as high production costs, mechanical limitations, and the need for scalability remain barriers to industrial adoption. The future of PHA in food packaging hinges on overcoming these challenges through further research and innovation in production techniques, material properties, and cost reduction strategies, along with necessary legislative support to promote widespread use.

A bibliometric analysis: what do we know about edible coatings?

Packaging aims first to protect the quality and safety of food. Although synthetic packaging is easy and practical to use, it significantly poses many health and environmental hazards. In this context, the need for environmentally and food-friendly packaging is increasing. Edible coatings with many barrier properties cover the food surface like a blanket. This study evaluated content analyses and research trends on the edible coating of foods. For this goal, a bibliometric network analysis of the studies that included the concepts of "edible packaging", "coating", and "food" together in the abstracts, keywords, and titles of the articles was carried out. Today, with this network analysis method, it is easier to summarize innovations in edible coating technology and their applicability to foods in a detailed and understandable way. Between 2016 and 2023, bibliometric data consisting of 2131 studies were processed VOSviewer program using the network analysis method. Results revealed that China is the leading country in coatings studies, followed by India. The study shows which foods and methods the coatings are applied.

Supplementary Information

The online version contains supplementary material available at 10.1007/s13197-024-06052-7.

Effect of chitosomes loaded zein on physicochemical, mechanical, microbial, and sensory characteristics of probiotic Kashk during cold storage

Functional foods like probiotics offer health benefits against various diseases, and plant bioactive compounds can enhance their growth. Zein, a protein, shows biological activity upon hydrolysis, and encapsulating it in nanoparticles improves bioavailability. This study examined chitosan-coated nanoliposomes as carriers for hydrolyzed and unhydrolyzed maize zein to fortify kashk. Combining chitosan and hydrolyzed zein in a 1:2 ratio achieves the highest encapsulation efficiency, antioxidant activity, smallest particle size, polydispersity index, and zeta potential. FTIR and XRD analyses confirm hydrolyzed zein's entrapment and crystalline nature post-encapsulation. Optimized nanoliposomes release hydrolyzed zein faster in simulated intestinal fluid than in gastric fluid, indicating high bioavailability and stability. When used to fortify kashk, these nanoliposomes slightly lower acidity but maintain standard pH over 60-day cold storage, improve elastic properties, and enhance probiotic viability. At the same time, sensory attributes remain comparable to the control, highlighting their functional food potential.

Assessment of chitosan coating enriched with Citrus limon essential oil on the quality characteristics and shelf life of beef meat during cold storage

The present work aimed to assess the effects of chitosan coating comprising Citrus limon essential oil (CLEO) as an antimicrobial and antioxidant on the quality and the shelf-life of beef meat during storage in cold temperatures. The microbial, chemical, and sensory characteristics of beef meat were repeatedly evaluated. The outcomes showed that CLEO had a substantial preservative effect on refrigerated beef meat by reducing total volatile basic nitrogen compounds (TVB-N), inhibiting the replication of microorganisms (p < 0.05), and decreasing oxidation (p < 0.05) during storage. The incorporation of CLEO into chitosan coating significantly reduced (p < 0.05), TBARS, especially for the Nano-CS- ClEO 2 % and 4 % groups, with values at the end of storage of approximately 0.68 and 1.01 mg MDA/kg respectively. Moreover, the meat treatments with essential oils led to lower carbonyl content production in compared to other groups that treated without essential oils. Coated beef meat had the highest inhibitory effects against microbial growth. The counts of Enterobacteriaceae, lactic acid bacteria (LAB), psychrophilic, and mesophilic bacteria were significantly lower (p < 0.05) in the Nano-CS- ClEO 2 % (1.1, 4.2, 6.2, and 6.32 Log CFU/g, respectively) at day 16. The sensory evaluation indicated that this coating with chitosan nanoemulsions in combination with ClEOs could significantly preserve sensory characteristics of beef meat during storage. Moreover, concerning sensory features, the control samples gained the maximum score. Additionally, the group that contains chitosan in combination with 4 % ClEO nanoliposomes had the highest inhibition of microbial growth, reduced sensory changes, and extending the shelf life of beef meat (p < 0.05). In conclusion, nanoemulsions containing Citrus limon essential oil had a significant preservation effect on beef meat during refrigerated storage by preventing the microorganism's proliferation and decreasing the oxidation of fat and protein (p < 0.05). Therefore, they are suggested to extend the durability of fresh meat products during refrigerated storage.

Effect of active composite coating based on nanochitosan-whey protein isolate on the microbial safety of chilled rainbow trout fillets packed with oxygen absorber

This study aimed to assess the effect of coating based on nanochitosan-whey protein isolate (NCH-WPI) containing summer savory essential oil (SEO) combined with oxygen absorber (OA) packaging on Pseudomonas aeruginosa, Listeria monocytogenes, and Escherichia coli O157H7, inoculated to rainbow trout fillets stored under refrigeration. Except control and OA groups, L. monocytogenes decreased (0.49-1.82 log CFU/g) in all treatment groups until the eighth day, and then increased (0.39-0.68 log CFU/g). This indicates that the treatments were ineffective to inhibit the proliferation of this bacterium. Considering the forced aerobic nature of inoculated P. aeruginosa, the counts of these bacteria become undetectable in groups packed with OA after the fourth day of storage, while the other groups showed an increase (0.99-2.23 log CFU/g) in this bacteria population during entire storage period. This growth rate was slower in the NCH-WPI + 1%SEO and NCH-WPI + 2%SEO groups. Regarding the inoculated E. coli, its count was decreased (1.48-2.41 log CFU/g) during storage, and this reduction (2.24-2.41 log CFU/g) was the highest in NCH-WPI + 1%SEO + OA and NCH-WPI + 2%SEO + OA groups. In conclusion, NCH-WPI treatments delayed the growth of all pathogenic bacteria, but the ternary treatment (NCH-WPI + SEO + OA) was the most effective treatment in this regard.

Impact of Packaging Methods Coupled with High Barrier Packaging Loaded with TiO2 on the Preservation of Chilled Pork

This study investigated the impact of packaging methods coupled with high barrier packaging loaded with titanium dioxide (TiO2) on the quality of chilled pork. The experiment consisted of three treatment groups: air packaging (AP), vacuum packaging (VP), and vacuum antibacterial packaging (VAP). Changes in total viable count (TVC), pH value, total volatile basic nitrogen (TVB-N) value, sensory attributes, and water holding capacity of pork were analyzed at 0, 3, 6, 9, and 12 d. TVC of the VAP group was 5.85 Log CFU/g at 12 d, which was lower than that of AP (6.95 Log CFU/g) and VP (5.93 Log CFU/g). The antibacterial film incorporating TiO2 effectively inhibited microorganism growth. The VAP group exhibited the lowest pH value and TVB-N value among all the treatment groups at this time. The findings demonstrated that the application of VAP effectively preserved the sensory attributes of pork, the hardness, cohesiveness and adhesiveness of pork in VAP group were significantly superior than those in AP group (p<0.05), but not significantly compared with VP group. On the 12 d, the CIE a* value of pork in VAP group was significantly higher (p<0.05). This exhibited that VAP could effectively maintain the freshness of chilled pork and extend the shelf life for 3 d compared to the AP group. These findings provide empirical evidence to support the practical implementation of TiO2-loaded packaging film in the food industry.

Effect of tragacanth gum-chitin nanofiber film containing free or nano-encapsulated cumin essential oil on the quality of chilled turkey burgers packed with oxygen absorber

This research was undertaken to assess the effect of tragacanth gum-chitin nanofiber (TG-CNF) film containing free (CEO) or encapsulated cumin essential oil (CNE) combined with oxygen absorber (OA) packaging on the shelf-life of ready-to-cook (RTC) turkey breast burgers during chilled storage. The experimental groups were OA and TG-CNF as single treatments, TG-CNF + CEO, TG-CNF + CNE, and TG-CNF + OA as binary treatments, TG-CNF + CEO + OA and TG-CNF + CNE + OA as ternary treatments, and control. The samples were stored at 3°C for 20 days and analyzed for microbial, physicochemical, and sensory attributes. Binary treatments, when compared to single treatments, and ternary treatments, when compared to binary treatments, exhibited enhanced effectiveness in managing microbial growth, hindering physicochemical alterations, and decelerating sensory alterations. At day 20, TG-CNF + CNE + OA group was identified as the most effective group in inhibiting the growth of total mesophilic bacteria (TMB), total psychrophilic bacteria (TSB), and coliforms (final counts were 4.8, 4.16, and ≤1 log CFU/g, respectively), and TG-CNF + CNE + OA and TG-CNF + CEO + OA groups were known as the most effective groups in inhibiting lactic acid bacteria (LAB) (final counts were 4.71 and 5.15 log CFU/g, respectively). Furthermore, the TG-CNF + CNE + OA treatment proved to be the most effective group in reducing the total volatile nitrogen (TVN) (final level was 19.2 mg N/100 g) and thiobarbituric acid reactive substances (TBARS) (final level was 0.119 mg malondialdehyde (MDA)/kg). TG-CNF + CNE + OA and TG-CNF + CEO + OA were the most efficient groups to delay the increasing rate of cooking loss (final values were 23.3% and 24.6%) and pH (final values were 7.01 and 6.99). The sample's shelf-life was 4 days in control and TG-CNF, 8 days in OA and TG-CNF + OA, 12 days in TG-CNF + CEO, 16 days in TG-CNF + CNE and TG-CNF + CEO + OA, and at least 20 days in TG-CNF + CNE + OA. As a result, the incorporation of TG-CNF + CNE alongside OA packaging emerges as a highly effective active packaging method for preserving RTC turkey breast burgers during chilled storage.

Liposomes as Carriers of Bioactive Compounds in Human Nutrition

This article provides an overview of the literature data on the role of liposomal structures and encapsulated substances in food technology and human nutrition. The paper briefly describes how liposomes are created and how they encapsulate food ingredients, which can either be individual compounds or plant extracts. Another very interesting application of liposomes is their use as antimicrobial carriers to protect food products from spoilage during storage. The encapsulation of food ingredients in liposomes can increase their bioavailability, which is particularly important for compounds with health-promoting properties but low bioavailability. Particular attention was paid to compounds such as phytosterols, which lower blood cholesterol levels but have very low absorption in the human body. In addition, consumer expectations and regulations for liposomes in food are discussed. To date, no in vivo human studies have been conducted to indicate which encapsulation methods give the best results for gastrointestinal effects and which food-added substances are most stable during food storage and processing. The paper identifies further lines of research that are needed before liposomes can be introduced into food.

Ferrous sulfate combined with ultrasound emulsified cinnamaldehyde nanoemulsion to cause ferroptosis in Escherichia coli O157:H7

The purpose of this study was to investigate ferroptosis in Escherichia coli O157:H7 caused by ferrous sulfate (FeSO4) and to examine the synergistic effectiveness of FeSO4 combined with ultrasound-emulsified cinnamaldehyde nanoemulsion (CALNO) on inactivation of E. coli O157:H7 in vitro and in vivo. The results showed that FeSO4 could cause ferroptosis in E. coli O157:H7 via generating reactive oxygen species (ROS) and exacerbating lipid peroxidation. In addition, the results indicated that FeSO4 combined with CALNO had synergistic bactericidal effect against E. coli O157:H7 and the combined treatment could lead considerable nucleic acids and protein to release by damaging the cell membrane of E. coli O157:H7. Besides, FeSO4 combined with CALNO had a strong antibiofilm ability to inhibit E. coli O157:H7 biofilm formation by reducing the expression of genes related on biofilm formation. Finally, FeSO4 combined with CALNO exhibited the significant antibacterial activity against E. coli O157:H7 in hami melon and cherry tomato.

Incorporation of ascorbic acid in chitosan-based coating combined with plasma-activated water: A technology for quality preservation of red grapes after simulated transportation

Red grapes possess multiple bioactivities but are highly susceptible to spoilage due to the lack of efficient preservation techniques. Plasma-activated water (PAW) treatment and the incorporation of antioxidants in bio-based coatings are promising methods for preserving produce. In this study, we tested a novel combination by incorporating ascorbic acid (AA) into a chitosan-based edible coating (CH) and combining it with plasma-activated water (PAW) treatment (CA-PAW) before simulating transport vibrations to extend the shelf-life of red grapes. The results from storage at 4 °C for 20 d indicated that the CA-PAW treatment reduced microbial counts by 2.62 log10 CFU/g for bacteria, 1.72 log10 CFU/g for yeasts and molds, and 1.1 log10 CFU/g for coliforms, in comparison to the control group treated with sterile deionized water. Total phenols and total flavonoid content were the highest observed, at 111.2 mg GAE/100 g and 262.67 mg RE/100 g, respectively. This treatment also inhibited water migration and erosion, and reduced damage to cell structure. Microstructural observations revealed that the CH coating on the surface of red grapes diminished the degradation of bioactive components. In conclusion, the CA-PAW treatment effectively inhibited the adverse physiological changes caused by vibration and mechanical damage to red grapes, maintained their nutritional and sensory qualities, and extended the shelf life by at least 8 d.

Application of essential oils as slow-release antimicrobial agents in food preservation: Preparation strategies, release mechanisms and application cases

Food spoilage caused by foodborne microorganisms will not only cause significant economic losses, but also the toxins produced by some microorganisms will also pose a serious threat to human health. Essential oil (EOs) has significant antimicrobial activity, but its application in the field of food preservation is limited because of its volatile, insoluble in water and sensitive to light and heat. Therefore, in order to solve these problems effectively, this paper first analyzed the antibacterial effect of EOs as an antimicrobial agent on foodborne bacteria and its mechanism. Then, the application strategies of EOs as a sustained-release antimicrobial agent in food preservation were reviewed. On this basis, the release mechanism and application cases of EOs in different antibacterial composites were analyzed. The purpose of this paper is to provide technical support and solutions for the preparation of new antibacterial packaging materials based on plant active components to ensure food safety and reduce food waste.

Chitosan nanoemulsion incorporated with Carum carvi essential oil as ecofriendly alternative for mitigation of aflatoxin B1 contamination in stored herbal raw materials

The present investigation entails the first report on entrapment of Carum carvi essential oil (CCEO) into chitosan polymer matrix for protection of stored herbal raw materials against fungal inhabitation and aflatoxin B1 (AFB1) production. Physico-chemical characterization of nanoencapsulated CCEO was performed through Fourier transform infrared spectroscopy, dynamic light scattering, X-ray diffractometry, and scanning electron microscopy. The nanoencapsulated CCEO displayed improved antifungal and AFB1 suppressing potentiality along with controlled delivery over unencapsulated CCEO. The encapsulated CCEO nanoemulsion obstructed the ergosterol production and escalated the efflux of cellular ions, thereby suggesting plasma membrane as prime target of antifungal action in Aspergillus flavus cells. The impairment in methyglyoxal production and modeling based carvone interaction with Afl-R protein validated the antiaflatoxigenic mechanism of action. In addition, CCEO displayed augmentation in antioxidant potentiality after encapsulation into chitosan nanomatrix. Moreover, the in-situ study demonstrated the effective protection of Withania somnifera root samples (model herbal raw material) against fungal infestation and AFB1 contamination along with prevention of lipid peroxidation. The acceptable organoleptic qualities of W. somnifera root samples and favorable safety profile in mice (animal model) strengthen the application of nanoencapsulated CCEO emulsion as nano-fungitoxicant for preservation of herbal raw materials against fungi and AFB1 mediated biodeterioration.

Enhancing the lipid stability of foods of animal origin using edible packaging systems

Foods of animal origin are prone to oxidation due to their high lipid content and fatty acid profile. Edible packaging systems have evolved as a new way of preserving animal-derived foods and have been reported to retard lipid oxidation using antioxidant molecules from side-streams, waste, and agricultural by-products. Studies have evaluated previously undocumented film materials and novel bioactive molecules as additives for edible packaging for animal-derived foods. However, none of the studies is specifically focused on evaluating the packaging systems available for enhancing lipid stability. This paper thoroughly examines and discusses the application of edible packaging containing novel antioxidant molecules for controlling the lipid oxidation of animal-derived foods. The paper analyses and interprets the main findings of the recently published research papers. The materials and active principles used for enhancing lipid stability have been summarised and the underlying mechanisms discussed in detail. Studies should aim at using cheaper and readily available natural ingredients in future for the production of affordable packaging systems.

Evaluation of whey protein coating containing nanoliposome dill (Anethum graveolens L.) essential oil on microbial, physicochemical and sensory changes of rainbow trout fish

The aim of this study was to investigate the effect of whey coating containing dill (Anethum graveolens L.) essential oil nanoliposome on the physicochemical, microbiological and sensory characteristics of rainbow trout (Oncorhynchus mykiss). Treatments comprise: sample without coating (control), coating containing whey, coating containing whey with essential oil (whey-EO) and coating containing whey with nano EO (whey-NEO). The particle size, zeta potential, polydispersity index and the encapsulation efficiency were ranged from 142 to 159 nm, -16.3 to -11.7 mV, 0.79 to 0.88 Mw/Mn and 45.85-70.01 %, respectively. Microbial analysis, after 21 days, the maximum and minimum of TVC (total viable counts), TPC (total psychrophilic counts) and LAB (lactic acid bacteria) counts were related to control (8.16 for TVC, 8.46 for TPC and 7.7 log CFU/g for LAB) and whey + NEO (7 for TVC, 7.3 for TPC and 6.16 log CFU/g for LAB), respectively. Also, results of pH, peroxide value (PV), thiobarbituric acid reactive substances (TBARS) and total volatile base-nitrogen (TVB-N) after 21 days were ranged from 6.3 (whey-NEO) to 7.5 (control), from 11.5(whey-NEO) to 20.9 mEq/Kg (control), from 5.23(whey-NEO) to 8.34 mg MDA/kg (control) and from 22.5 (whey-NEO) to 37 mg N/100 g (control), respectively. Finally, in all sensory evaluation items (texture, off-odor, discoloration and red color), the best result after 21 days was related to whey-NEO (score = 1). Consequently, the edible coating comprising whey and nanoliposome of EO could be effective to the maintenance of fish's microbiological, physicochemical, and sensory properties.

An overview of the potential application of chitosan in meat and meat products

Chitosan is considered the second most ubiquitous polysaccharide next to cellulose. It has gained prominence in various industries including biomedicine, textile, pharmaceutical, cosmetic, and notably, the food industry over the last few decades. The polymer's continual attention within the food industry can be attributed to the increasing popularity of greener means of packaging and demand for foods incorporated with natural alternatives instead of synthetic additives. Its antioxidant, antimicrobial, and film-forming abilities reinforced by the polymer's biocompatible, biodegradable, and nontoxic nature have fostered its usage in food packaging and preservation. Microbial activity and lipid oxidation significantly influence the shelf-life of meat, resulting in unfavorable changes in nutritional and sensory properties during storage. In this review, the scientific studies published in recent years regarding potential applications of chitosan in meat products; and their effects on shelf-life extension and sensory properties are discussed. The utilization of chitosan in the form of films, coatings, and additives in meat products has supported the extension of shelf-life while inducing a positive impact on their organoleptic properties. The nature of chitosan and its compatibility with various materials make it an ideal biopolymer to be used in novel arenas of food technology.

The effect of essential oil of Zataria multiflora incorporated chitosan (free form and Pickering emulsion) on microbial, chemical and sensory characteristics in salmon (Salmo trutta)

The objective of current research was to prepare a new biodegradable coating containing chitosan (Ch) and zataria multiflora essential oil (ZMEO) (free and Pickering emulsion (PEO) forms), in order to enhance the Salmo trutta shelf life. Our results showed, the mean of films thickness, mechanical properties (elastic modulus (EM) and tensile strength (TS) analysis) and WVP in different treatments were ranged from 0.103 ± 0.003 (for Ch) to 0.109 ± 0.003 (for Ch-PEO (2.5 %)) µm for thickness, from 3.2 ± 1.6 (for Ch) to 8.15 ± 2.3 (for Ch-EO) MPa for EM, from 1.3 ± 0.5 (for Ch-EO) to 1.6 ± 0.06 (for Ch) Mpa for TS and from 0.1 ± 0.02 (for Ch) to 0.8 ± 0.05 (for Ch-EO) (×10 - 11(g m/m2 s Pa) for WVP. In current research, the lowest and highest total viable counts (TVC) was related to Ch-PEO (1.7 log CFU/g) and control treatments (4.65 log CFU/g). The lowest and highest of pH was related to the Ch-PEO (6.45) and the control (7.1), the lowest and highest of PV (peroxide value) was related to Ch-PEO (0.34 meq/kg) and control treatment (1.37 meq/kg), the lowest and highest of TBARS (thiobarbituric acid reactive substances) was related to Ch-PEO (0.37 mg/kg) and control treatment (2.23 mg/kg) and also the lowest and highest of TVB-N (total volatile base nitrogen) was related to Ch-PEO (17.7 mg) and control (59 mg). Also, Ch-PEO showed the best sensory properties after sixteen days. Among all the treatments in all the tests, the best maintenance property was related to the Ch-PEO, therefore, chitosan coatings containing ZM Pickering emulsion should be considered as a potential active coating in the fish industry.

Effect of Urtica dioica L. Essential oil (forms of free and nanoliposome) on some inoculated pathogens (Escherichia coli and Listeria monocytogenes) in minced camel meat

The goal of research was to investigate the impact of nanoliposome and free forms of nettle (Urtica dioica L.) essential oil (EO) on sensory, chemical and microbial properties of minced camel meat during storage at 4 °C. In our investigation, Listeria monocytogenes and Escherichia coli were inoculated into minced camel meat. The outcomes expressed the zeta potential, particle size, polydispersity index and efficiency of encapsulation of prepared nanoliposome were -17.5 mV to -12.8 mV, 143 to 158 nm, 0.77 ± 0.05 to 0.86 ± 0.07 Mw/Mn and 50.26-67.28 %, respectively. Also, according to the microbial analysis, the MIC of EO and nanoliposome-EO (N-EO) for E.coli was 25 ± 2.5 and 25 ± 2.1 mg/mL, respectively, and for L. monocytogenes was 12.5 ± 2.1 and 12.5 ± 2.1 mg/mL, respectively, and the MBC of EO and N-EO for L. monocytogenes was 50 ± 3.1 and 50 ± 3.2 mg/mL, respectively, and for E. coli was 50 ± 2.2 and 50 ± 2.2 mg/mL, respectively. The highest of 2,2-Diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assay were detected in the BHT 200 (94.7 ± 2.7 and 95.6 ± 3.2, respectively) and lowest of them were detected NEO1% (33.7 ± 12.2 and 22.37 ± 0.22, respectively). After 18 days, the minimum value of pH was identified in the N-EO 2 % group incubated with L. monocytogenes (with pH = 6.9) and E. coli (with pH = 6.87). Furthermore, after 18 days of storage, the minimum TVB-N (total volatile basic nitrogen) value was observed in the N-EO group (26.89 mg N/100 g) and the maximum TVB-N value was observed in the control group (33.78 mg N/100 g). Finally, the N-EO and control treatment (during the experiment) had the highest and lowest sensory evaluation score, respectively. Finally, the N-EO group got a highest sensory score, whilst the group of control got the lowest acceptance score, after 18 days of storage. Based on the outcomes obtained from this research, using nettle (Urtica dioica L.) EO (in nanoliposome form) increases the storing time of minced camel meat.

Investigation of structural and physicochemical properties of microcapsules obtained from protein-polysaccharide conjugate via the Maillard reaction containing Satureja khuzestanica essential oil

In this study, some common proteins including, whey protein isolate (WPI), soy protein isolate (SPI), and gelatin (G) conjugated with maltodextrin (MD) via Maillard reaction and were then used to encapsulate Satureja khuzestanica essential oil (SKEO). The higher glycation degree was obtained at a pH of 9 and 3 h of heating at 60 °C for SPI and WPI, and 90 °C for G. The results of FTIR and intrinsic fluorescence test showed the possibility of covalent binding formation between proteins and maltodextrin. The encapsulation efficiencies were obtained about 83.84 %, 88.95 %, and 89.27 % for MD-SPI, MD-G, and MD-WPI, respectively. Moreover, the Maillard reaction-based microcapsules had higher antioxidant activity than the physical mixture of protein-polysaccharide. The addition of SKEO to microcapsules improved antimicrobial activity. The results of this study demonstrated that MD-WPI and MD-G, as encapsulating materials, can be used to enhance the physiochemical properties of microcapsules loaded with SKEO.

The effects of double gelatin containing chitosan nanoparticles-calcium alginate coatings on the stability of chicken breast meat

The effects of gelatin coatings (2% and 4%) containing chitosan nanoparticles (ChNPs; 1% and 2%), in combination with calcium-alginate coatings (CA; 2%), on quality attributes and shelf life of chicken breast meat were evaluated at 4°C for 12 days. The results indicated that double-active gelatin-calcium alginate coatings had significant (p < .05) effects on moisture and protein content. Incorporation of ChNPs into double gelatin-CA coatings led to significant reduction (p < .05) in TBARS, pH, and TVB-N values at the end of storage. The counts of total viable count (TVC), coliforms, yeasts, and molds were significantly (p < .05) lower in all coated samples, particularly in treated samples by 4% gelatin containing 2% ChNPs + 2% CA coatings (6.85, 6.78, and 5.91 log CFU/g, respectively, compared with 8.35, 8.76, and 7.71 log CFU/g in control) at the end of keeping time. The results of sensory attributes showed that the coated samples had higher overall acceptability scores compared with the untreated samples. A synergistic relationship between the concentrations of gelatin and ChNPs was observed in maintaining the quality characteristics of meat samples during storage. Therefore, this study aims to evaluate the performance of double gelatin coating containing ChNPs in combination with CA coating in the storage quality improvement of chicken breast meat stored for 12 days at 4 °C to develop novel and practical coatings for meat and meat products.

The Research Field of Meat Preservation: A Scientometric and Visualization Analysis Based on the Web of Science

Meat plays a significant role in human diets, providing a rich source of high-quality protein. With advancements in technology, research in the field of meat preservation has been undergoing dynamic evolution. To gain insights into the development of this discipline, the study conducted an analysis and knowledge structure mapping of 1672 papers related to meat preservation research within the Web of Science Core Collection (WOSCC) spanning from 2001 to 2023. And using software tools such as VOSviewer 1.6.18 and CiteSpace 5.8.R3c allowed for the convenient analysis of the literature by strictly following the software operation manuals. Moreover, the knowledge structure of research in the field of meat preservation was synthesized within the framework of "basic research-technological application-integration of technology with fundamental research," aligning with the research content. Co-cited literature analysis indicated that meat preservation research could be further categorized into seven collections, as well as highlighting the prominent role of the antibacterial and antioxidant properties of plant essential oils in ongoing research. Subsequently, the future research direction and focus of the meat preservation field were predicted and prospected. The findings of this study could offer valuable assistance to researchers in swiftly comprehending the discipline's development and identifying prominent research areas, thus providing valuable guidance for shaping research topics.

Recent Updates on Multifunctional Nanomaterials as Antipathogens in Humans and Livestock: Classification, Application, Mode of Action, and Challenges

Pathogens cause infections and millions of deaths globally, while antipathogens are drugs or treatments designed to combat them. To date, multifunctional nanomaterials (NMs), such as organic, inorganic, and nanocomposites, have attracted significant attention by transforming antipathogen livelihoods. They are very small in size so can quickly pass through the walls of bacterial, fungal, or parasitic cells and viral particles to perform their antipathogenic activity. They are more reactive and have a high band gap, making them more effective than traditional medications. Moreover, due to some pathogen's resistance to currently available medications, the antipathogen performance of NMs is becoming crucial. Additionally, due to their prospective properties and administration methods, NMs are eventually chosen for cutting-edge applications and therapies, including drug administration and diagnostic tools for antipathogens. Herein, NMs have significant characteristics that can facilitate identifying and eliminating pathogens in real-time. This mini-review analyzes multifunctional NMs as antimicrobial tools and investigates their mode of action. We also discussed the challenges that need to be solved for the utilization of NMs as antipathogens.

Advances in efficient extraction of essential oils from spices and its application in food industry: A critical review

With the increase of people's awareness of food safety, it is crucial to find natural and green antimicrobial agents to replace traditional antimicrobial agents. Essential oils of spices (SEOs) are low toxicity or nontoxic, which exhibited antioxidants and antimicrobial activity according to many in vitro and in situ experiments. Spices are widely available and low cost as a plant raw material for the extraction of SEOs. This review summarized highly efficient extraction techniques for SEOs, such as physical field assisted extraction technology, supercritical fluid extraction, and biological-based techniques. Furthermore, purification of SEOs and components were also recapitulated. Purification techniques of SEOs improve their utilization value due to the increased content of bioactive components. Finally, the review concentrated on the applications of SEOs in food industry, including food preservation, food active packaging by means of films or coatings, antioxidant properties. In addition, addressing the problem of unstability of SEOs and its role to inhibit the pathogenic bacteria, the encapsulation of SEOs for use in the food industrial sectors reduces the safety risk to human health.

Alginate-based edible coating with oregano essential oil/β-cyclodextrin inclusion complex for chicken breast preservation

A sodium alginate (SA) edible coating containing oregano essential oil (OEO)/β-cyclodextrin (β-CD) inclusion complexes (SA/OEO-MP coating) was developed to extend the shelf life of fresh chicken breast during refrigeration storage. First, OEO was inserted into the hydrophobic interior of β-CD to form an inclusion complex (OEO-MP) that maintained its excellent antioxidant and antibacterial activities. The formed OEO-MP was characterized using fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). In addition, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results demonstrated that β-CD could improve the thermal stability of OEO. The encapsulation efficiency reached 71.6 %, and OEO was released continuously from the OEO-MP. The lipid oxidation, total viable count (TVC) and sensory properties of chicken breasts were regularly monitored when OEO-MP was incorporated into the SA coating for chicken breast preservation. Compared with the uncoated group, the SA/OEO-MP-coated groups showed significantly reduced increases in pH, thiobarbituric acid reactive substances (TBARS), total volatile base nitrogen (TVB-N), and TVC, especially in the SA/OEO-MP1 group. In summary, the SA/OEO-MP coating could preserve the chicken breast by reducing lipid oxidation and inhibiting the proliferation of microorganisms. It would be developed as a prospective edible packaging for chicken preservation.

Nanoparticles of chitosan and oregano essential oil: application as edible coatings on chicken patties

Abstract

The dense nutritional structure of meat predisposes it to microbial spoilage and oxidative changes. Thus, the present study evaluated the antimicrobial and antioxidant effect of the edible coating of nanoparticles of chitosan and oregano essential oil on the quality and shelf-life of chicken patties. Total four types of edible coatings were prepared, viz. T1:0.3% chitosan; T2:0.3% chitosan incorporated with 0.3% v/v oregano essential oil; T3:0.3% chitosan nanoparticles and T4: nanoparticles of 0.3% chitosan incorporated with 0.3% v/v oregano essential oil which were characterized by UV-visible spectrophotometry, particle size analysis and High-Resolution Transmission Electron Microscopy (HR-TEM). The chicken patties were dipped in developed edible coatings and evaluated for quality parameters at five days interval during refrigeration storage (4 ± 1 °C). The results indicated significantly (P < 0.05) improved physicochemical, microbiological, Hunter colour and sensory parameters in treatments than in control. Among the treatments, quality parameters were significantly enhanced in T4 than in other treatments. The results revealed that T3 and T4 had an improved shelf life of about 25 days while T1 and T2 had a shelf life of 15 and 20 days, respectively, but control spoiled on the 10th day of refrigeration storage.

Graphical abstract

Edible coating of nanoparticles of chitosan alone (T3) as well as chitosan incorporated with incorporated with oregano essential (T4) oil were prepared and characterized by HR-TEM and UV-Vis Spectrophotometry. UV-Vis Spectrophotometry revealed that T3 and T4 had the absorption maximum of 209 nm and 276 nm, respectively. HR-TEM revealed that (T4) had a spherical shape, with average size ranging from 100 to 200 nm while (T3) had a smaller size ranging from 80 to 100 nm, with a rough surface having a dense structure. Upon coating of chicken patties with edible coatings, a significant improvement was observed in the quality and shelf-life of chicken patties than control during refrigeration storage (4±1 °C).

Supplementary Information

The online version contains supplementary material available at 10.1007/s13197-023-05804-1.

New coating containing chitosan and Hyssopus officinalis essential oil (emulsion and nanoemulsion) to protect shrimp (Litopenaeus vannamei) against chemical, microbial and sensory changes

In this study, the effect of chitosan coating containing emulsion and nanoemulsion of Hyssopus officinalis essential oil (EO) on the chemical, microbiological and sensory characteristics of shrimp (Litopenaeus vannamei) was investigated. The minimum value of TVB-N (Total volatile basic nitrogen), TBARS (Thiobarbituric acid reactive substances), PV (peroxide value), TMA-N (Trimethylamine-nitrogen) and FFA (Free fatty acids) after 12 days were shown in NE + HEO 1% (coating containing chitosan with nanoemulsion of EO) with 20.53 mg N/100 g, 0.5 µg/kg, 0.88 MAQ peroxide/kg, 1.3 mg/100 g and 12.16 mg 100% of oleic acid, respectively. Also, minimum value of pH after 12 days was related to the CE + HEO 1% (coating containing chitosan with emulsion of EO) with 7.60. The minimum value of psychrophilic and mesophilic microbial count after 12 days were shown in NE + HEO 1%, 4.40 ± 0.36 and 4.03 ± 0.06 cfu/g, respectively. The best score of sensory evaluation was observed in the NE-HEO 1% treatment. As a result, the edible coating containing chitosan-based nanoemulsion could be effective to the preservation of shrimp's microbiological, chemical, and sensory characteristics.

The effect of essential oil of Anethum graveolens L. seed and gallic acid (free and nano forms) on microbial, chemical and sensory characteristics in minced meat during storage at 4 °C

The aim of this study was to evaluate the effect of gallic acid (GA) and essential oil (EO) of Anethum graveolens L. seed (forms of nanoliposome and free) on bacteriological, chemical and sensory properties of minced meat during storage. In this research, Escherichia coli (gram negative) and Staphylococcus aureus (gram positive) were used to examine the effect of these compounds on meat. The particle sizes (z-average diameter) of prepared nanoliposomes of EO and GA were in the range of 141 to 165 nm and 146-160 nm, respectively and the efficiency of encapsulation (EE %) in the current research was 51.76-69.8% in nano EO (NEO) and 53.23-67.07% in nano gallic acid (N-GA). Also, the outcomes indicated the treatment containing nano-liposomes had a better antimicrobial effect in both of bacteria. In present study, the Minimum Inhibitory Concentration (MIC) of GA, N-GA, EO and NEO for S. aureus was 0.62 ± 0.01, 0.62 ± 0.02, 0.62 ± 0.01 and 0.62 ± 0.01 mg/mL, respectively, and for E. coli was 0.62 ± 0.01, 0.62 ± 0.01, 1.25 ± 0.1 and 1.25 ± 0.1 mg/mL, respectively. Also, the results showed MBC (The Minimum Bactericidal Concentration) of GA, N-GA, EO and NEO for S. aureus was 0.62 ± 0.02, 0.62 ± 0.03, 1.25 ± 0.1 and 1.25 ± 0.1 mg/mL, respectively, and for E. coli was0.62 ± 0.01, 1.25 ± 0.1, 2.5 ± 0.2, 2.5 ± 0.2 mg/mL, respectively. The highest and lowest of 2,2-Diphenyl-1-picrylhydrazyl (DPPH) radical scavenging were detected, in the Butylated hydroxytoluene (BHT) 200 and EO1%, respectively. Furthermore, after 18 day, minimum pH and Total volatile basic nitrogen (TVB-N) value were related to the N-GA2% on S. aureus with pH = 6.5 and NEO group (27 mg N/100 g), respectively. Finally, the treatment of NEO showed a higher acceptance score of sensory evaluation after 18 days. According to the outcomes of current investigation, the use of nanocapsulated EO and GA are effective (as a coating for food storage) and can increase the shelf life of minced meat.

Recent Trends in Active Packaging Using Nanotechnology to Inhibit Oxidation and Microbiological Growth in Muscle Foods

Muscle foods are highly perishable products that require the use of additives to inhibit lipid and protein oxidation and/or the growth of spoilage and pathogenic microorganisms. The reduction or replacement of additives used in the food industry is a current trend that requires the support of active-packaging technology to overcome novel challenges in muscle-food preservation. Several nano-sized active substances incorporated in the polymeric matrix of muscle-food packaging were discussed (nanocarriers and nanoparticles of essential oils, metal oxide, extracts, enzymes, bioactive peptides, surfactants, and bacteriophages). In addition, the extension of the shelf life and the inhibitory effects of oxidation and microbial growth obtained during storage were also extensively revised. The use of active packaging in muscle foods to inhibit oxidation and microbial growth is an alternative in the development of clean-label meat and meat products. Although the studies presented serve as a basis for future research, it is important to emphasize the importance of carrying out detailed studies of the possible migration of potentially toxic additives, incorporated in active packaging developed for muscle foods under different storage conditions.

Effect of chitosan-gelatine edible coating containing nano-encapsulated clove ethanol extract on cold storage of chilled pork

Meat safety and quality are the main concerns of consumers in the present food market. Chitosan-gelatin edible coatings containing nano-encapsulated clove ethanol extracts (CNPs), designated as CHI-GEL-CNPs, on the quality preservation of chilled pork were studied. Results showed that the mean particle diameters of CNPs were 346.15 ± 37.30 nm. Nano-modification improved the antibacterial activity of free clove ethanol extract. The increasing rate order of TVB-N and TBARS was CHI-GEL-CNPs < CHI-GEL-Clove < CHI-GEL < CHI < CON group. The CHI-GEL-CNPs coating inhibited the elevation of pH and total viable count (TVC) of chilled pork. The TVB-N and TVC values demonstrated that the CHI-GEL-CNPs coating effectively extended the shelf life of chilled pork up to 13 days. In addition, the sensory properties of CHI-GEL-CNPs chilled pork loins were superior to that of control samples. Therefore, the developed CHI-GEL-CNPs coatings have great promise as a nanocomposite for meat preservation.

Edible packaging systems for enhancing the sensory quality of animal-derived foods

Maintaining the sensory quality of animal-derived foods from paddock to plate is a big challenge due to their fatty acid profile and susceptibility to oxidative changes and microbial spoilage. Preventive measures are taken by manufacturers and retailers to offset the adverse effects of storage to present animal foods to consumers with their best sensory attributes. The use of edible packaging systems is one of the emerging strategies that has recently attracted the attention of researchers and food processors. However, a review that specifically covers the edible packaging systems focused on improving the sensory quality of animal-derived foods is missing in the literature. Therefore, the objective of this review is to discuss in detail various edible packaging systems currently available and their mechanisms for enhancing the sensory properties of animal-derived foods. The review includes the findings of recent papers published during the last 5 years and summarises the novel materials and bioactive agents.

Plant Antimicrobials for Food Quality and Safety: Recent Views and Future Challenges

The increasing demand for natural, safe, and sustainable food preservation methods drove research towards the use of plant antimicrobials as an alternative to synthetic preservatives. This review article comprehensively discussed the potential applications of plant extracts, essential oils, and their compounds as antimicrobial agents in the food industry. The antimicrobial properties of several plant-derived substances against foodborne pathogens and spoilage microorganisms, along with their modes of action, factors affecting their efficacy, and potential negative sensory impacts, were presented. The review highlighted the synergistic or additive effects displayed by combinations of plant antimicrobials, as well as the successful integration of plant extracts with food technologies ensuring an improved hurdle effect, which can enhance food safety and shelf life. The review likewise emphasized the need for further research in fields such as mode of action, optimized formulations, sensory properties, safety assessment, regulatory aspects, eco-friendly production methods, and consumer education. By addressing these gaps, plant antimicrobials can pave the way for more effective, safe, and sustainable food preservation strategies in the future.

Characterization of Synthetic Polymer Coated with Biopolymer Layer with Natural Orange Peel Extract Aimed for Food Packaging

This research was aimed to make biolayer coatings enriched with orange peel essential oil (OPEO) on synthetic laminate, oriented poly(ethylene-terephthalate)/polypropylene (PET-O/PP). Coating materials were taken from biobased and renewable waste sources, and the developed formulation was targeted for food packaging. The developed materials were characterized for their barrier (O₂, CO₂, and water vapour), optical (colour, opacity), surface (inventory of peaks by FTIR), and antimicrobial activity. Furthermore, the overall migration from a base layer (PET-O/PP) in an acetic acid (3% HAc) and ethanol aqueous solution (20% EtOH) were measured. The antimicrobial activity of chitosan (Chi)-coated films was assessed against Escherichia coli. Permeation of the uncoated samples (base layer, PET-O/PP) increased with the temperature increase (from 20 °C to 40 °C and 60 °C). Films with Chi-coatings were a better barrier to gases than the control (PET-O/PP) measured at 20 °C. The addition of 1% (w/v) OPEO to the Chi-coating layer showed a permeance decrease of 67% for CO₂ and 48% for O₂. The overall migrations from PET-O/PP in 3% HAc and 20% EtOH were 1.8 and 2.3 mg/dm², respectively. Analysis of spectral bands did not indicate any surface structural changes after exposure to food simulants. Water vapour transmission rate values were increased for Chi-coated samples compared to the control. The total colour difference showed a slight colour change for all coated samples (ΔE > 2). No significant changes in light transmission at 600 nm for samples containing 1% and 2% OLEO were observed. The addition of 4% (w/v) OPEO was not enough to obtain a bacteriostatic effect, so future research is needed.

Studying the microbial, chemical, and sensory characteristics of shrimp coated with alginate sodium nanoparticles containing Zataria multiflora and Cuminum cyminum essential oils

Retardation of quality loss of seafood has been a new concept in recent years. This study's main objective was to evaluate the microbial, chemical, and sensory attributes of shrimp coated with alginate sodium nanoparticles containing Zataria multiflora and Cuminum cyminum essential oils (EOs) during refrigerated storage. At the end of storage time (15 days storage at 4°C), the pH, thiobarbituric acid reactive substances (TBARS), and total volatile basic nitrogen (TVBN) amounts in shrimps coated with the alginate nanoparticles were 7.62, 1.14 mg MDA/kg, and 117 mg/100 g which were significantly (p < .05) lower than the control groups. The count of all bacteria groups was also lower in this treatment, which was 2-2.74 Log CFU/mL on day 15 of cold storage. This combined treatment also obtained the highest sensory scores (around 7) and the lowest melanosis score (2.67) due to the effective delaying microbial and oxidation activities. Therefore, this edible coating could substantially retard microbial and chemical changes and improve the organoleptic properties of shrimp under refrigerated storage.

Chitosan edible coating: a potential control of toxic biogenic amines and enhancing the quality and shelf life of chilled tuna filets

Edible films and coatings offer great potential to support sustainable food production by lowering packaging waste, extending product shelf life, and actively preserving food quality. Using edible coatings containing plant extracts with antioxidant and antibacterial characteristics could help to enhance the quality and shelf life of fish products. In this study, the combination effect of chitosan with beetroot, curcumin, and garlic extracts on biogenic amines (BAs) reduction, biochemical quality [pH, thiobarbituric acid index (TBA), trimethylamine (TMA), and total volatile base (TVB)], shelf life and sensory characteristics of tuna filets was investigated over 14 days of refrigerated storage compared to control (uncoated) samples. The results showed that the coated samples experienced a lower increase in BAs levels than the control samples. Among the treated samples, chitosan incorporated with curcumin (CH-C) showed the highest reduction in BAs formation (1.45 – 19.33, 0.81 – 4.45, and 1.04 – 8.14 mg/kg), followed by chitosan with garlic (CH-G) (1.54 – 21.74, 0.83 – 5.77, and 1.08 – 8.84 mg/kg), chitosan with beetroot extract (CH-B) (1.56 – 31.70, 0.84 – 6.79, and 1.07 – 10.82 mg/kg), and chitosan without extract addition (CH) (1.62 – 33.83, 0.71 – 7.82 and 1.12 – 12.66 mg/kg) compared to control samples (1.62 – 59.45, 0.80 – 11.96, and 1.14 – 20.34 mg/kg) for histamine, cadaverine, and putrescine, respectively. In addition, the rate of increase in pH, TBA, TMA, and TVB of all coated treatments was lower than in the control samples. Sensory evaluation results revealed that chitosan-treated samples incorporated with beetroot, garlic, and curcumin extracts showed good quality and acceptability characteristics. Overall, chitosan edible coatings incorporated with beetroot, garlic, and curcumin extracts reduced the formation of biogenic amine, delayed biochemical deterioration, and extended the shelf life of tuna filets. Among the treated samples, CH-C demonstrated a remarkable superiority in all the studied parameters. Therefore, this study provides a promising strategy for the incorporation of active compounds in edible coatings to improve the quality and safety of foods during storage.

Obtaining non-digestible polysaccharides from distillers' grains of Chinese baijiu after extrusion with enhanced antioxidation capability

Distillers' grains of Chinese Baijiu (DGS) presents a significant challenge to the environmentally-friendly production of the brewing industry. This study utilized screw extrusion to modify the morphological and crystalline characteristics of DGS, resulting in a 316 % increase in the yield of non-digestible polysaccharides extraction. Physiochemical characteristics of extracted polysaccharides were variated, including infrared spectrum, monosaccharide composition, and molecular weight. Polysaccharides extracted from extruded DGS exhibited enhanced inhibitory capacity on α-amylase activity and starch hydrolyzation, as compared to those extracted from unextruded DGS. Additionally, the ABTS, DPPH, and OH radical scavenging efficiencies took a maximum increase of 1.20, 1.38, and 1.02-fold, correspondingly. Extrusion is a novel approach for the recycling non-digestible polysaccharides from DGS, augmenting the bioactivity of extracts and their potential application in functional food.

Fortification of polysaccharide-based packaging films and coatings with essential oils: A review of their preparation and use in meat preservation

As the demand for botanical food additives and eco-friendly food packaging materials grows, the use of essential oils, edible biodegradable films and coatings are becoming more popular in packaging. In this review, we discussed the recent research trends in the use of natural essential oils, as well as polysaccharide-based coatings and films: from the composition of the substrates to preparing formulations for the production of film-forming technologies. Our review emphasized the functional properties of polysaccharide-based edible films that contain plant essential oils. The interactions between essential oils and other ingredients in edible films and coatings including polysaccharides, lipids, and proteins were discussed along with effects on film physical properties, essential oil release, their active role in meat preservation. We presented the opportunities and challenges related to edible films and coatings including essential oils to increase their industrial value and inform the development of edible biodegradable packaging, bio-based functional materials, and innovative food preservation technologies.

'Click' synthesized calcium-chitosan-triazole nanocomplex from CaC2 as an efficient drug carrier, antimicrobial and antioxidant polymer

A calcium-chitosan-triazole nanocomplex (Ca@CS-Tz) was synthesized via the robust copper catalyzed azide-alkyne cycloaddition using calcium carbide (CaC2) as an in-situ source of acetylene. The nanocomplex was characterized by various techniques and it was proved to be an efficient drug carrier with satisfactory antimicrobial and antioxidant properties. Quercetin loaded nanocomplex (encapsulation efficiency- 68.2 ± 1.0 %) was studied for targeted drug release and the drug release after 120 h was found to be 80.7 ± 0.8 % and 8.69 ± 0.5 % at pH 5.0 and 7.4 respectively. On biological evaluation, the nanocomplex showed enhanced antimicrobial activity against gram-negative bacteria Escherichia coli (E. coli), gram-positive bacteria Bacillus subtilis (B. subtilis) and a fungi Aspergillus niger (A. niger). Moreover, the synthesized Ca@CS-Tz nanocomplex also exhibited significant antioxidant property. Herein, the novel results corresponding to the antimicrobial effect on A. niger and drug delivery studies performed using our previously synthesized chitosan triazole (CS-triazole) derivative have also been reported. Finally, the results of the present study were compared to the results obtained to our previously reported derivative. The incorporation of calcium ions into CS-triazole can lead to the utilization of this complex in various other biomedical applications e.g. bone tissue engineering.

Application of oleaster leaves (Elaeagnus angustifolia L.) essential oil and natural nanoparticle preservatives in frankfurter-type sausages: An assessment of quality attributes and stability during refrigerated storage

The effects of oleaster leave essential oil (OLEOs: 1000 and 2000 ppm) in combination with nisin nanoparticles (200 ppm) and ε-polylysine nanoparticles (2000 ppm) on the physicochemical, microbiological and sensory properties of the emulsion-type sausages without added chemical nitrite/nitrate salts were evaluated during 45 days of storage. Nanoparticle attributes were assessed, including encapsulation efficiency (EE%), zeta potential, nanoparticles size, FTIR analysis, and thermal stability (DSC). Overall, ε-PL nanoparticles (ε-PL-NPs) were thermally more stable and showed higher EE% (91.52%) and zeta potential (37.80%) as compared to nisin nanoparticles (82.85%) and (33.60%), respectively. The use of combined ε-PL-NPs (2000 ppm) + Ni-NPs (200 ppm) with oleaster leaves essential oil (2000 ppm) resulted in a higher pH value (5.88), total phenolic content (10.45 mg/100 g) and lower TBARS (2.11 mg/kg), and also decreased total viable bacteria (1.28 Log CFU/g), Clostridium perfringens (1.43 Log CFU/g), E. coli (0.24 Log CFU/g), Staphylococcus aureus (0.63 Log CFU/g), and molds and yeasts (0.86 Log CFU/g) count in samples at day 45 in comparison to the control (120 ppm nitrite). The consumers approved sensory traits in nitrite-free formulated sausages containing ε-PL-NPs and Ni-NPs combined with OLEOs.