Nanofibrous zein/PEG based membranes incorporated with natural antimicrobial compounds were fabricated by electrospinning method. Structural and thermal analysis of prepared nanofibers revealed that the applied processing technique did not significantly affect the structure of pristine zein polymer. Morphological characterization showed a higher degree of polydispersity in the fibers modified with eugenol, thymol, nisin, or their combinations, and an average fiber diameter in the range from 300 to 390 nm. Nanofibrous samples with eugenol and thymol prevented the growth of Escherichia coli and Staphylococcus aureus, while the nisin or its mixtures with phenols proved a high antibacterial effect against Gram-positive Listeria ivanovii. Zein/PEG membranes with bioactive molecules significantly eliminated biofilm formation, with the most pronounced effect of zein/PEG/Eug/Thy combination. Biodegradability testing of bioactive membranes revealed no significant slowdown of degradation process in comparison to control sample. Zein/PEG hydrophilic nanofibers enriched with phenol/nisin combinations demonstrated a high potential for development of sustainable packaging to improve the shelf-life and quality of foods.
- Klíčová slova
- Antibacterial, Antibiofilm, Biodegradable, Nanofibers, Nisin, Sustainable, Zein,
- MeSH
- antibakteriální látky farmakologie chemie MeSH
- antiinfekční látky * farmakologie chemie MeSH
- biofilmy účinky léků MeSH
- Escherichia coli účinky léků MeSH
- Listeria účinky léků MeSH
- mikrobiální testy citlivosti MeSH
- nanovlákna * chemie ultrastruktura MeSH
- nisin farmakologie chemie MeSH
- obaly potravin * metody MeSH
- polyethylenglykoly * chemie MeSH
- Staphylococcus aureus účinky léků MeSH
- zein * chemie MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- antibakteriální látky MeSH
- antiinfekční látky * MeSH
- nisin MeSH
- polyethylenglykoly * MeSH
- zein * MeSH
Antibacterial biodegradable PLA-based nanofibers loaded with phenolic monoterpenes - thymol, eugenol, carvacrol, and cinnamaldehyde, were prepared by electrospinning. The effect of bioactive molecule on the surface, thermal, morphological, and biological properties has been investigated about the potential pharmaceutical and food processing applications. Fiber diameters ranged from 320 nm for PLA fibrous mat up to 480 nm for PLA membrane with 6 % thymol. All the prepared active nanofibers exhibited hydrophobic surfaces with a slightly decreasing contact angle after the incorporation of phenols. Antimicrobial testing proved a strong efficiency against Escherichia coli and Staphylococcus aureus, depending on the specific type and content of the bioactive compound. A significant biofilm formation reduction of bioactive PLA nanofibers was revealed against tested microorganisms. Modification of PLA fibers with active molecules did not significantly affect the biodegradation kinetics in comparison to PLA samples with their absence. This study demonstrates the high potential of newly developed PLA-based/phenol nanofibrous membranes for use as antibacterial and antifouling systems applicable in wound dressings and food packaging.
- Klíčová slova
- Antibacterial, Antifouling, Biodegradable, Biomedical applications, Electrospinning, Polylactic acid, Sustainable,
- MeSH
- antibakteriální látky * farmakologie chemie MeSH
- biofilmy účinky léků MeSH
- cymeny MeSH
- Escherichia coli účinky léků MeSH
- fenoly * chemie farmakologie MeSH
- mikrobiální testy citlivosti MeSH
- monoterpeny * chemie farmakologie MeSH
- nanovlákna * chemie ultrastruktura MeSH
- obaly potravin MeSH
- polyestery * chemie MeSH
- Staphylococcus aureus účinky léků MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- antibakteriální látky * MeSH
- carvacrol MeSH Prohlížeč
- cymeny MeSH
- fenoly * MeSH
- monoterpeny * MeSH
- poly(lactide) MeSH Prohlížeč
- polyestery * MeSH
Tree gums, classified as non-wood forest products (NWFPs), are becoming increasingly popular because of their substantial influence on the livelihoods of individuals in developing nations and their ability to enhance the well-being of locals. As food additives and frameworks for current and future non-food applications, tree-based carbohydrate gums are critical as sustainable, ecological, biodegradable, and recyclable materials. This review expounds on the crucial and assorted applications of gum Karaya (Sterculia urens; GK) and gum Kondagogu (Cochlospermum gossypium; KG) and their derivatives in nanoparticle synthesis, energy harvesting/storage, food packaging, hydrogel formulations, environmental bioremediation, and water purification. They can be applied as functional nanofibers, sponges, films, hydrogels, and nanocomposites. A thorough evaluation of recent scientific research on 'green' and sustainable manifestations of these gum polymers (including their functionalized material forms, fabrication techniques, products, and advances) has been directed in terms of various scientific applications and possible industrial domains. This review extends sustainable product enhancement based on these natural gums ranging from laboratory to future industrial-scale manufacturing and the associated challenges, thus envisaging a platform for the United Nations Sustainable Development Goals (UNSDGs 1, 2, 6, and 7) in livelihood, agricultural sustainability, clean water, and sanitation, as well as affordable clean energy.
- Klíčová slova
- Binders, Carbohydrate gum polymers, Fibers, Films, Gum Karaya, Kondagogu Gum, Sponges, Sustainable products,
- MeSH
- Bixaceae * chemie MeSH
- guma karaya * chemie MeSH
- hydrogely chemie MeSH
- obaly potravin MeSH
- rostlinné gumy * chemie MeSH
- Sterculia * chemie MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
- Názvy látek
- guma karaya * MeSH
- hydrogely MeSH
- rostlinné gumy * MeSH
Due to the growing environmental concerns of petroleum-based plastics, there has been a surge of interest in biodegradable alternatives. In this study, starch-based bioplastic was prepared using biopolymers extracted from corn and potato and the biopolymer was mixed with calcium carbonate (filler) and plasticizers (glycerol-sorbitol) and evaluated. For the fabricated formulation, Taguchi analysis gave an optimal formulation of 9 g corn starch, 9 mL glycerol, and 2.5 g calcium carbonate, having a well-balanced mechanical strength, flexibility, and biodegradability. The results showed a major improvement in tensile strength of 22.5% (6.08 MPa) and a 31.7% increase in Young's modulus (0.103 GPa), compared to the least effective sample. In biodegradation tests, the degradation rate of C1 (66.68%) was the fastest, while C3 had a slower rate (29.08%). Moisture absorption varied considerably, with sample COM3 absorbing 25.92% compared to just 4.35% for P3, while P3 absorbed only 4.35%. Among compounds, the higher and lower percentage for water solubility were for P1 (20.50%) and C3 (49.04%) respectively. These results underscore the potential of starch-based bioplastics for sustainable packaging, offering an environmentally friendly option compared to traditional plastics.
- Klíčová slova
- Biodegradable alternatives, Biodegradation, Environmental impact, Petroleum-based plastics, Starch-based bioplastics,
- MeSH
- biodegradace MeSH
- biologicky odbouratelné plasty * chemie MeSH
- biopolymery chemie MeSH
- glycerol chemie MeSH
- kukuřice setá chemie MeSH
- modul pružnosti MeSH
- obaly potravin * MeSH
- pevnost v tahu MeSH
- plastické hmoty * chemie MeSH
- rozpustnost MeSH
- škrob * chemie MeSH
- Solanum tuberosum chemie MeSH
- uhličitan vápenatý chemie MeSH
- změkčovadla chemie MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- biologicky odbouratelné plasty * MeSH
- biopolymery MeSH
- glycerol MeSH
- plastické hmoty * MeSH
- škrob * MeSH
- uhličitan vápenatý MeSH
- změkčovadla MeSH
BACKGROUND: Over 1800 food contact chemicals (FCCs) are known to migrate from food contact articles used to store, process, package, and serve foodstuffs. Many of these FCCs have hazard properties of concern, and still others have never been tested for toxicity. Humans are known to be exposed to FCCs via foods, but the full extent of human exposure to all FCCs is unknown. OBJECTIVE: To close this important knowledge gap, we conducted a systematic overview of FCCs that have been monitored and detected in human biomonitoring studies according to a previously published protocol. METHODS: We first compared the more than 14,000 known FCCs to five biomonitoring programs and three metabolome/exposome databases. In a second step, we prioritized FCCs that have been frequently detected in food contact materials and systematically mapped the available evidence for their presence in humans. RESULTS: For 25% of the known FCCs (3601), we found evidence for their presence in humans. This includes 194 FCCs from human biomonitoring programs, with 80 of these having hazard properties of high concern. Of the 3528 FCCs included in metabolome/exposome databases, most are from the Blood Exposome Database. We found evidence for the presence in humans for 63 of the 175 prioritized FCCs included in the systematic evidence map, and 59 of the prioritized FCCs lack hazard data. SIGNIFICANCE: Notwithstanding that there are also other sources of exposure for many FCCs, these data will help to prioritize FCCs of concern by linking information on migration and biomonitoring. Our results on FCCs monitored in humans are available as an interactive dashboard (FCChumon) to enable policymakers, public health researchers, and food industry decision-makers to make food contact materials and articles safer, reduce human exposure to hazardous FCCs and improve public health. IMPACT STATEMENT: We present systematically compiled evidence on human exposure to 3601 food contact chemicals (FCCs) and highlight FCCs that are of concern because of their known hazard properties. Further, we identify relevant data gaps for FCCs found in food contact materials and foods. This article improves the understanding of food contact materials' contribution to chemical exposure for the human population and highlights opportunities for improving public health.
- MeSH
- biologický monitoring MeSH
- kontaminace potravin * analýza MeSH
- lidé MeSH
- obaly potravin * MeSH
- vystavení vlivu životního prostředí * analýza MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
This study evaluates the influence of inadequate transport conditions on the microbiological quality of chilled chicken meat packaged in plain and modified atmosphere packaging (MAP). The experiments simulated the temperature increase during sample transport to 8, 11, 14, 17, 20, and 25°C with exposure times of 1, 2, 3, and 4 h. Aerobic plate count (APC), psychrotrophic microorganisms count (PMC), β-D-glucuronidase-positive Escherichia coli, and Salmonella spp. were evaluated immediately after the exposure to the elevated temperature (0 h), 3 h, and 24 h after the return to the temperature of ≤4°C. The upper acceptable limits for APC and PMC were set for each combination of investigated chicken meat and packaging type, taking also the initial bacterial condition into account. Chilled chicken breast samples in plain packaging exceeded the APC limits in 16 cases and PMC limits in 20 cases when exposed to temperatures of >4°C, while only 2 MAP samples exceeded APC limits and 8 samples PMC limits, respectively. In chicken legs, 8 samples in plain packaging exceeded the APC limits and 15 the PMC limits, while 12 samples in MAP exceeded the APC limits and 19 the PMC limits. In 402 samples (31.9%) in which the presence of E. coli was detected, its amount ranged from 1.70 to 3.65 log CFU.g-1. It was more commonly detected in chicken legs (255 of 630; 40.5%) than chicken breasts (147 of 630; 23.3%) but was not related to exposure temperature, exposure time, or time until examination. The presence of Salmonella spp. was not detected in any of the samples. Data acquired in the presented study will be used in the development of software helping the national supervisory authorities in the Czech Republic to evaluate whether inadequate transport of samples to analytical laboratories could have affected the microbiological profile of the sample.
- Klíčová slova
- aerobic plate count, modified atmosphere, plain packaging, psychrotrophic microorganism,
- MeSH
- chlazení MeSH
- Escherichia coli izolace a purifikace MeSH
- kur domácí * MeSH
- maso * mikrobiologie MeSH
- nízká teplota MeSH
- obaly potravin * metody MeSH
- potravinářská mikrobiologie * MeSH
- Salmonella izolace a purifikace MeSH
- zvířata MeSH
- Check Tag
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Biodegradable films derived from polysaccharides are increasingly considered eco-friendly alternatives to synthetic packaging in the food industry. The study's purpose was to improve the antimicrobial properties of biopolymer-based films made from starch, chitosan, alginate, and their blends (starch/chitosan and starch/alginate) and to evaluate the effects of modifiers, i.e., plant extracts, plasticizers, cross-linking agents, and nanofillers. Films were prepared via the Solution Casting Method and modified with various plasticizers, calcium chloride, oxidized sucrose, and nanofiber cellulose (NC). Chestnut, nettle, grape, and graviola extracts were tested for antimicrobial activity against Staphylococcus epidermidis, Escherichia coli, and Candida albicans. The film's mechanical and hydrophilic properties were studied as well. The chestnut extract showed the strongest antimicrobial properties, leading to its incorporation in all the films. The chitosan films displayed better antibacterial activity against Gram-positive than Gram-negative bacteria but were ineffective against C. albicans. NC significantly improved the mechanical and antimicrobial properties of the chitosan films. The alginate films, modified with various plasticizers cross-linked with calcium chloride, demonstrated the highest antimicrobial efficacy against E. coli. The starch films, cross-linked with oxidized sucrose, exhibited slightly lower antimicrobial resistance due to a more compact structure. Films such as ALG6 and ALG5, including plasticizers EPGOS and PGOS, respectively, indicated optimal hydrophilicity and mechanical properties and achieved the best antimicrobial performance against all the investigated microorganisms. All these findings highlight the potential of these biodegradable films for food packaging, offering enhanced antimicrobial activity that prolongs shelf life and reduces spoilage, making them promising candidates for sustainable food preservation.
- Klíčová slova
- antimicrobial, biofilms, environmentally friendly, food packaging,
- MeSH
- algináty chemie MeSH
- antiinfekční látky * farmakologie chemie MeSH
- biopolymery chemie farmakologie MeSH
- Candida albicans * účinky léků MeSH
- chitosan * chemie farmakologie MeSH
- Escherichia coli účinky léků růst a vývoj MeSH
- mikrobiální testy citlivosti MeSH
- obaly potravin * metody MeSH
- rostlinné extrakty chemie farmakologie MeSH
- škrob * chemie MeSH
- Staphylococcus epidermidis účinky léků MeSH
- změkčovadla chemie MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- algináty MeSH
- antiinfekční látky * MeSH
- biopolymery MeSH
- chitosan * MeSH
- rostlinné extrakty MeSH
- škrob * MeSH
- změkčovadla MeSH
Food packaging waste significantly impacts global environmental changes, prompting the adoption of a green circular economy approach. Recycling packaging waste is a critical element of this strategy. However, it faces challenges related to the quality of recycled materials and concerns about their safety. Thus, this review aimed to highlight different analytical methods alone or in combination to evaluate the quality of the recycled material. Furthermore, the safety and health aspects related to the migration of contaminants and their relevant regulations have also been discussed. An important parameter while selecting an appropriate recycling method is the composition and nature of the recyclate, for instance, HDPE (High-Density Polyethylene), PET (Polyethylene Terephthalate), and PP (Polypropylene) materials can be recycled using mechanical and chemical recycling, however, PVC (Polyvinyl Chloride) and PS (Polystyrene) present challenges during mechanical recycling due to lower molecular weight and complex compositions, thus are often downcycled into lower-grade products. Still, recycled papers can be more problematic than recycled plastics due to the nature of the materials and the impact of recycling. The literature review suggested that three quality properties i.e., presence of low molecular weight compounds, degree of degradation, and composition should be analyzed by using different spectroscopic, thermo-mechanical, and chromatographic techniques to obtain a detailed understanding of recycled material quality. Furthermore, recycling should be done in such a way that the migration of contaminants should be lower than the migratory limits set by the relevant authorities to avoid any toxicological effects.
- Klíčová slova
- Green economy, Migration analysis, Quality assessment techniques, Recycled packaging waste, Safety concerns,
- MeSH
- nakládání s odpady metody MeSH
- obaly potravin * MeSH
- plastické hmoty MeSH
- recyklace * metody MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
- Názvy látek
- plastické hmoty MeSH
The aim of this study was to analyze the functional properties of newly obtained films based on sodium alginate and lecithin with the addition of antioxidant-rich coffee extracts and to verify their potential as safe edible food packaging materials. In our study, we developed alginate-lecithin films enriched with green or roasted coffee bean extracts. The roasting process of coffee beans had a significant impact on the total phenolic content (TPC) in the studied extracts. The highest value of TPC (2697.2 mg GAE/dm3), as well as antioxidant activity (AA) (17.6 mM T/dm3), was observed for the extract of light-roasted coffee beans. Films with the addition of medium-roasted coffee extracts and baseline films had the highest tensile strength (21.21 ± 0.73 N). The addition of coffee extract improved the barrier properties of the films against UV light with a decrease in the transmittance values (200-400 nm), regardless of the type of extract added. Studies on Caco-2, HepG2 and BJ cells showed that digestated films were non-cytotoxic materials (100-0.1 μg/cm3) and had no negative effect on cell viability; an increase was noted for all cell lines, the highest after 48 h in a dose of 1 μg/cm3 for a film with medium-roasted coffee (194.43 ± 38.30) for Caco-2. The tested films at 20% digestate concentrations demonstrated the ability to reduce nitric oxide (NO) production in the RAW264.7 cell line by 25 to 60% compared to the control. Each of the tested films with coffee extracts had growth inhibitory properties towards selected species of bacteria.
- Klíčová slova
- antimicrobial activity, antioxidant activity, biopolymer-based packaging, coffee extracts, cytotoxicity, edible packaging, lecithin, nitric oxide, sodium alginate,
- MeSH
- algináty * chemie farmakologie MeSH
- antiflogistika * farmakologie chemie MeSH
- antiinfekční látky farmakologie chemie MeSH
- antioxidancia * farmakologie chemie MeSH
- buňky Hep G2 MeSH
- Caco-2 buňky MeSH
- Coffea chemie MeSH
- jedlé filmy MeSH
- káva chemie MeSH
- lecitiny * chemie MeSH
- lidé MeSH
- myši MeSH
- obaly potravin metody MeSH
- rostlinné extrakty * chemie farmakologie MeSH
- semena rostlinná chemie MeSH
- viabilita buněk účinky léků MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- algináty * MeSH
- antiflogistika * MeSH
- antiinfekční látky MeSH
- antioxidancia * MeSH
- káva MeSH
- lecitiny * MeSH
- rostlinné extrakty * MeSH
The present research was conducted to explore the potential of mango kernel starch from the Chaunsa variety to develop starch and starch nanoparticles (SNPs) based films. The investigation included starch isolation from mango kernel followed by the preparation of SNPs by acid hydrolysis and a thorough examination of various physicochemical properties for film formation. The properties of SNPs were found to be distinctly different from those of native starch. SNPs exhibited an aggregated form with an irregular surface, whereas native starch had an oval and elongated shape with a smooth surface. X-ray diffraction (XRD) analysis confirmed that the starch type in SNPs was of the A-type. Additionally, the pasting properties of SNPs were minimal due to the acid hydrolysis process. SNP-based composite film was developed with (5 %) SNP concentration added. This successful incorporation of SNPs enhanced biodegradability, with complete degradation occurring within three weeks. Moreover, the composite films displayed increased burst strength, measuring 1303.51 ± 73.7 g, and lower water vapor transmission rates (WVTR) at (7.40 ± 0.50) × 10-3 g per square meter per second and reduced water solubility at 35.32 ± 3.0 %. This development represents a significant advancement in the field of eco-friendly packaging materials.
- Klíčová slova
- Mango kernel starch, Nanoparticles films, Waste utilization,
- MeSH
- difrakce rentgenového záření MeSH
- hydrolýza MeSH
- Mangifera * chemie MeSH
- nanočástice * chemie MeSH
- obaly potravin metody MeSH
- rozpustnost MeSH
- škrob * chemie MeSH
- Publikační typ
- časopisecké články MeSH
- Názvy látek
- škrob * MeSH
