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1.
Anal Chim Acta ; 1316: 342837, 2024 Aug 08.
Article in English | MEDLINE | ID: mdl-38969427

ABSTRACT

Monitoring the levels of L-Tryptophan (L-Trp) in body fluids is crucial due to its significant role in metabolism and protein synthesis, which ultimately affects neurological health. Herein, we have developed a novel magneto-responsive electrochemical enantioselective sensor for the recognition of L-Trp based on oriented biochar derived from Loofah, Fe3O4 nanoparticles, and molecularly imprinted polydopamine (MIPDA) in xanthan hydrogel. The successful synthesis of these materials has been confirmed through physicochemical and electrochemical characterization. Various operational factors such as pH, response time, loading sample volume, and loading of active materials were optimized. As a result, the sensor exhibited an affordable linear range of 1.0-60.0 µM, with a desirable limit of detection of 0.44 µM. Furthermore, the proposed electrochemical sensor demonstrated good reproducibility and desirable selectivity for the determination of L-Trp, making it suitable for analyzing L-Trp levels in human plasma and serum samples. The development presented offers an appealing, easily accessible, and efficient strategy. It utilizes xanthan hydrogel to improve mass transfer and adhesion, biochar-stabilized Fe3O4 to facilitate magnetic orientation and accelerate mass transfer and sensitivity, and polydopamine MIP to enhance selectivity. This approach enables on-site evaluation of L-Trp levels, which holds significant value for healthcare monitoring and early detection of related conditions.


Subject(s)
Electrochemical Techniques , Hydrogels , Polysaccharides, Bacterial , Tryptophan , Tryptophan/chemistry , Tryptophan/blood , Polysaccharides, Bacterial/chemistry , Hydrogels/chemistry , Stereoisomerism , Humans , Molecular Imprinting , Polymers/chemistry , Molecularly Imprinted Polymers/chemistry , Indoles/chemistry , Biopolymers/chemistry , Limit of Detection , Magnetite Nanoparticles/chemistry
2.
ACS Appl Bio Mater ; 7(6): 3841-3853, 2024 Jun 17.
Article in English | MEDLINE | ID: mdl-38836520

ABSTRACT

One of the gut-derived uremic toxins 4-ethylphenyl sulfate (4-EPS) exhibits significantly elevated plasma levels in chronic kidney diseases and autism, and its early quantification in bodily fluids is important. Therefore, the development of rapid and sensitive technologies for 4-EPS detection is of significant importance for clinical diagnosis. In the current work, the synthesis of a molecularly imprinted biopolymer (MIBP) carrying 4-EPS specific cavities only using the biopolymer polydopamine (PDA) and molybdenum disulfide (MoS2) nanosheets has been reported. The fabricated electrode was prepared using screen-printed carbon electrodes on a polyvinyl chloride substrate. The synthesized material was characterized using several techniques, and electrochemical studies were performed using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. The DPV technique for the electrochemical sensing of 4-EPS using the fabricated sensor (PDA@MoS2-MIBP) determined a sensitivity of 0.012 µA/ng mL/cm2 and a limit of detection of 30 ng/mL in a broad linear range of 1-2200 ng/mL. Also, the interferent study was performed to evaluate the selectivity of the fabricated sensor along with the control and stability study. Moreover, the performance of the sensor was evaluated in the spiked urine sample, and a comparison was made with the data obtained by ultraperformance liquid chromatography-tandem mass spectroscopy.


Subject(s)
Disulfides , Electrochemical Techniques , Materials Testing , Molecular Imprinting , Molybdenum , Molybdenum/chemistry , Disulfides/chemistry , Polymers/chemistry , Polymers/chemical synthesis , Nanostructures/chemistry , Biocompatible Materials/chemistry , Biocompatible Materials/chemical synthesis , Particle Size , Indoles/chemistry , Biopolymers/chemistry , Humans , Sulfhydryl Compounds
3.
Drug Des Devel Ther ; 18: 2063-2087, 2024.
Article in English | MEDLINE | ID: mdl-38882042

ABSTRACT

The burgeoning global mortality rates attributed to cancer have precipitated a critical reassessment of conventional therapeutic modalities, most notably chemotherapy, due to their pronounced adverse effects. This reassessment has instigated a paradigmatic shift towards nanomedicine, with a particular emphasis on the potentialities of biopolymer-assisted drug delivery systems. Biopolymers, distinguished by their impeccable biocompatibility, versatility, and intrinsic biomimetic properties, are rapidly ascending as formidable vectors within the cancer theragnostic arena. This review endeavors to meticulously dissect the avant-garde methodologies central to biopolymer-based nanomedicine, exploring their synthesis, functional mechanisms, and subsequent clinical ramifications. A key focus of this analysis is the pioneering roles and efficacies of lipid-based, polysaccharide, and composite nano-carriers in enhancing drug delivery, notably amplifying the enhanced permeation and retention effect. This examination is further enriched by referencing flagship nano formulations that have received FDA endorsement, thereby underscoring the transformative potential and clinical viability of biopolymer-based nanomedicines. Furthermore, this discourse illuminates groundbreaking advancements in the realm of photodynamic therapy and elucidates the implications of advanced imaging techniques in live models. Conclusively, this review not only synthesizes current research trajectories but also delineates visionary pathways for the integration of cutting-edge biomaterials in cancer treatment. It charts a course for future explorations within the dynamic domain of biopolymer-nanomedicine, thereby contributing to a deeper understanding and enhanced application of these novel therapeutic strategies.


Subject(s)
Antineoplastic Agents , Drug Delivery Systems , Nanomedicine , Neoplasms , Humans , Biopolymers/chemistry , Neoplasms/drug therapy , Antineoplastic Agents/chemistry , Antineoplastic Agents/administration & dosage , Antineoplastic Agents/pharmacology , Animals , Drug Carriers/chemistry
4.
Sci Rep ; 14(1): 13110, 2024 06 07.
Article in English | MEDLINE | ID: mdl-38849459

ABSTRACT

Low-impact fishing gear, such as fish pots, could help reduce human's impact on coastal marine ecosystems in fisheries but catch rates remain low and the harvest of resources used for baiting increases their environmental cost. Using black seabreams (Spondyliosoma cantharus) as target species in the Bay of Biscay, we developed and assessed the efficiency of biodegradable biopolymer-based baits (hereafter bio-baits) made of cockles (Cerastoderma edule) and different biopolymer concentrations. Through a suite of deep and machine learning models, we automatized both the tracking and behavior classification of seabreams based on quantitative metrics describing fish motion. The models were used to predict the interest behavior of seabream towards the bait over 127 h of video. All behavior predictions categorized as interested to the bait were validated, highlighting that bio-baits have a much weaker attractive power than natural bait yet with higher activity after 4 h once natural baits have been consumed. We also show that even with imperfect tracking models, fine behavioral information can be robustly extracted from video footage through classical machine learning methods, dramatically lifting the constraints related to monitoring fish behavior. This work therefore offers new perspectives both for the improvement of bio-baits and automatic fish behavior recognition.


Subject(s)
Behavior, Animal , Fisheries , Sea Bream , Animals , Behavior, Animal/physiology , Sea Bream/physiology , Machine Learning , Fishes/physiology , Conservation of Natural Resources/methods , Ecosystem , Biopolymers/chemistry
5.
Biomater Adv ; 162: 213921, 2024 Sep.
Article in English | MEDLINE | ID: mdl-38870740

ABSTRACT

Eco-friendly nanotechnology-enabled biopolymers are one of the novel concepts of packaging materials to substitute traditional synthetic polymers and their composites. This article succinctly reviews the recent developments of introducing additional functionalities to biopolymers using metal and metal oxide nanoparticles. The functionality of metal nanoparticles such as silver, zinc oxide, titanium dioxide, copper oxide, gold, and magnesium oxide, as food packaging materials were discussed. The addition of nanoparticles in biopolymers improves mechanical properties, gas barrier properties, durability, temperature stability, moisture stability, antimicrobial activity, antioxidant property, and UV absorbance and can prevent the presence of ethylene and oxygen, hence extending the shelf life of foodstuffs. Other than this, the functional activity of these biopolymer composite films helps them to act like smart or intelligent packaging. The selection of metal nanoparticles, particle migration, toxicological effect, and potential future scope in the food packaging industry are also reviewed.


Subject(s)
Food Packaging , Metal Nanoparticles , Food Packaging/methods , Biopolymers/chemistry , Metal Nanoparticles/chemistry , Nanocomposites/chemistry , Humans , Antioxidants/chemistry , Antioxidants/pharmacology
6.
Int J Biol Macromol ; 273(Pt 1): 132920, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38851611

ABSTRACT

Electromagnetic induction (EMI) shielding has become essential across various industries to counteract the detrimental impact of EMI on electronic devices and delicate machinery. Traditional EMI shielding materials, predominantly composed of metals and metal alloys, raise environmental concerns due to their non-biodegradability and energy-intensive manufacturing processes. Consequently, demand for environmentally friendly materials for EMI shielding applications is rising. This comprehensive review focuses on sustainable materials derived from bamboo, wood, cellulose, biopolymers, and industrial recycled materials for EMI shielding. The study begins with an overview of the theoretical principles and mechanisms underlying EMI shielding, providing insights into the ideal requirements and structure-property relationships of shielding materials. Subsequently, various categories of sustainable materials for EMI shielding are compared, including aerogel-based, foam-based, nanocarbon (CNT/graphene)-based, nanocellulose-based, and hybrid biocomposites. These materials will be studied in-depth based on their material type, structure type, and production method, encompassing diverse approaches such as bottom-up synthesis, top-down fabrication, and composite assembly. Furthermore, the review highlights the difficulties and potential advantages linked with developing sustainable materials for EMI shielding. By exploring bamboo, wood, cellulose and biopolymer-based materials, this review contributes to the ongoing efforts in advancing sustainable practices in EMI shielding technology.


Subject(s)
Cellulose , Cellulose/chemistry , Wood/chemistry , Biopolymers/chemistry
7.
Int J Biol Macromol ; 273(Pt 1): 133051, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38862057

ABSTRACT

Pollen is a promising material for water treatment owing to its renewable nature, abundant sources, and vast reserves. The natural polymer sporopollenin, found within pollen exine, possesses a distinctive layered porous structure, mechanical strength, and stable chemical properties, which can be utilized to prepare sporopollenin exine capsules (SECs). Leveraging these attributes, pollen or SECs can be used to develop water pollution remediation materials. In this review, the structure of pollen is first introduced, followed by the categorization of various methods for extracting SECs. Then, the functional expansion of pollen adsorbents, with an emphasis on their recyclability, reusability, and visual sensing capabilities, as opposed to mere functional group modification, is discussed. Furthermore, the progress made in utilizing pollen as a biological template for synthesizing catalysts is summarized. Intriguingly, pollen can also be engineered into self-propelled micromotors, enhancing its potential application in adsorption and catalysis. Finally, the challenges associated with the application of pollen in water pollution treatment are discussed. These challenges include the selection of environmentally friendly, non-toxic reagents in synthesizing pollen water remediation products and the large-scale application after synthesis. Moreover, the multifunctional synthesis and application of different water remediation products are prospected.


Subject(s)
Carotenoids , Pollen , Pollen/chemistry , Biopolymers/chemistry , Carotenoids/chemistry , Water Purification/methods , Adsorption , Water Pollutants, Chemical/chemistry , Catalysis , Water Pollution/prevention & control
8.
Int J Biol Macromol ; 273(Pt 2): 132986, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38866286

ABSTRACT

As a unique natural resource, fungi are a sustainable source of lipids, polysaccharides, vitamins, proteins, and other nutrients. As a result, they have beneficial medicinal and nutritional properties. Polysaccharides are among the most significant bioactive components found in fungi. Increasing research has revealed that fungal polysaccharides (FPS) contain a variety of bioactivities, including antitumor, antioxidant, immunomodulatory, anti-inflammatory, hepatoprotective, cardioprotective, and anti-aging properties. However, the exact knowledge about FPS and their applications related to their future possibilities must be thoroughly examined to enhance a better understanding of this sustainable biopolymer source. Therefore, FPS' biological applications and their role in the food and feed industry, agriculture, and cosmetics applications were all discussed in this work. In addition, this review highlighted the mode of action of FPS on human diseases by regulating gut microbiota and discussed the mechanism of FPS as antioxidants in the living cell. The structure-activity connections of FPS were also highlighted and explored. Moreover, future perspectives were listed to pave the way for future studies of FPS applications. Hence, this study can be a scientific foundation for future FPS research and industrial applications.


Subject(s)
Antioxidants , Fungal Polysaccharides , Humans , Fungal Polysaccharides/chemistry , Fungal Polysaccharides/pharmacology , Antioxidants/pharmacology , Antioxidants/chemistry , Biopolymers/chemistry , Animals , Fungi
9.
Int J Biol Macromol ; 273(Pt 2): 133090, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38878920

ABSTRACT

Biodegradable and sustainable food packaging (FP) materials have gained immense global importance to reduce plastic pollution and environmental impact. Therefore, this review focused on the recent advances in biopolymers based on cellulose derivatives for FP applications. Cellulose, an abundant and renewable biopolymer, and its various derivatives, namely cellulose acetate, cellulose sulphate, nanocellulose, carboxymethyl cellulose, and methylcellulose, are explored as promising substitutes for conventional plastic in FP. These reviews focused on the production, modification processes, and properties of cellulose derivatives and highlighted their potential for their application in FP. Finally, we reviewed the effects of incorporating cellulose derivatives into film in various aspects of packaging properties, including barrier, mechanical, thermal, preservation aspects, antimicrobial, and antioxidant properties. Overall, the findings suggest that cellulose derivatives have the potential to replace conventional plastics in food packaging applications. This can contribute to reducing plastic pollution and lessening the environmental impact of food packaging materials. The review likely provides insights into the current state of research and development in this field and underscores the significance of sustainable food packaging solutions.


Subject(s)
Cellulose , Food Packaging , Food Packaging/methods , Cellulose/chemistry , Biopolymers/chemistry , Anti-Infective Agents/chemistry , Anti-Infective Agents/pharmacology
10.
Int J Biol Macromol ; 273(Pt 2): 133204, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38889831

ABSTRACT

Herein, the novel eco-friendly biopolymer electrolytes consisting of banana powder and konjac glucomannan host matrix doped with zinc acetate salt were successfully fabricated through simple casting technique. The biopolymer electrolyte exhibited satisfactory thermal stability and mechanical properties; tensile strength (13.82 MPa); elongation at break (60.52 %) and Young's modulus (93.2 MPa). The electrochemical studies were carried out in symmetrical cells Zn/Zn cells. Biopolymer electrolyte showed favorable ionic conductivity of 5.59 × 10-4 S/cm along with stable cycling performance. The potential stability was found to be 2.52 V. The as-prepared biopolymer electrolytes demonstrated the potential as green, simple yet effective biopolymer electrolytes for zinc-ion batteries.


Subject(s)
Electric Power Supplies , Electrolytes , Mannans , Musa , Powders , Zinc , Mannans/chemistry , Musa/chemistry , Electrolytes/chemistry , Zinc/chemistry , Biopolymers/chemistry , Ions/chemistry , Electric Conductivity , Tensile Strength
11.
Biomolecules ; 14(6)2024 Jun 14.
Article in English | MEDLINE | ID: mdl-38927101

ABSTRACT

In recent years, there has been growing interest in the development of metal-free, environmentally friendly, and cost-effective biopolymer-based piezoelectric strain sensors (bio-PSSs) for flexible applications. In this study, we have developed a bio-PSS based on pure deoxyribonucleic acid (DNA) and curcumin materials in a thin-film form and studied its strain-induced current-voltage characteristics based on piezoelectric phenomena. The bio-PSS exhibited flexibility under varying compressive and tensile loads. Notably, the sensor achieved a strain gauge factor of 407 at an applied compressive strain of -0.027%, which is 8.67 times greater than that of traditional metal strain gauges. Furthermore, the flexible bio-PSS demonstrated a rapid response under a compressive strain of -0.08%. Our findings suggest that the proposed flexible bio-PSS holds significant promise as a motion sensor, addressing the demand for environmentally safe, wearable, and flexible strain sensor applications.


Subject(s)
Biosensing Techniques , Curcumin , DNA , Graphite , Curcumin/chemistry , DNA/chemistry , Graphite/chemistry , Biopolymers/chemistry , Biosensing Techniques/methods
12.
J Mater Chem B ; 12(26): 6351-6370, 2024 Jul 03.
Article in English | MEDLINE | ID: mdl-38864220

ABSTRACT

Surface wrinkling provides an approach to modify the surfaces of biomedical devices to better mimic features of the extracellular matrix and guide cell attachment, proliferation, and differentiation. Biopolymer wrinkling on active materials holds promise but is poorly explored. Here we report a mechanically actuated assembly process to generate uniaxial micro-and nanosized silk fibroin (SF) wrinkles on a thermo-responsive shape-memory polymer (SMP) substrate, with wrinkling demonstrated under both dry and hydrated (cell compatible) conditions. By systematically investigating the influence of SMP programmed strain magnitude, film thickness, and aqueous media on wrinkle stability and morphology, we reveal how to control the wrinkle sizes on the micron and sub-micron length scale. Furthermore, as a parameter fundamental to SMPs, we demonstrate that the temperature during the recovery process can also affect the wrinkle characteristics and the secondary structures in the silk network. We find that with increasing SMP programmed strain magnitude, silk wrinkled topographies with increasing wavelengths and amplitudes are achieved. Furthermore, silk wrinkling is found to increase ß-sheet content, with spectroscopic analysis suggesting that the effect may be due primarily to tensile (e.g., Poisson effect and high-curvature wrinkle) loading modes in the SF, despite the compressive bulk deformation (uniaxial contraction) used to produce wrinkles. Silk wrinkles fabricated from sufficiently thick films (roughly 250 nm) persist after 24 h in cell culture medium. Using a fibroblast cell line, analysis of cellular response to the wrinkled topographies reveals high viability and attachment. These findings demonstrate use of wrinkled SF films under physiologically relevant conditions and suggest the potential for biopolymer wrinkles on biomaterials surfaces to find application in cell mechanobiology, wound healing, and tissue engineering.


Subject(s)
Fibroins , Fibroins/chemistry , Animals , Biopolymers/chemistry , Mice , Biocompatible Materials/chemistry , Biocompatible Materials/pharmacology , Protein Structure, Secondary , Bombyx/chemistry , Surface Properties , Silk/chemistry , Fibroblasts/cytology , Smart Materials/chemistry
13.
Carbohydr Polym ; 339: 122228, 2024 Sep 01.
Article in English | MEDLINE | ID: mdl-38823903

ABSTRACT

Meat products consumption is rising globally, but concerns about sustainability, fat content, and shelf life. Synthetic additives and preservatives used for extending the shelf life of meat often carry health and environmental drawbacks. Seed mucilage, natural polysaccharides, possesses unique functional properties like water holding, emulsifying, and film forming, offering potential alternatives in meat processing and preservation. This study explores the application of seed mucilage from diverse sources (e.g., flaxseed, psyllium, basil) in various meat and meat products processing and preservation. Mucilage's water-holding and emulsifying properties can potentially bind fat and decrease the overall lipid content in meat and meat-based products. Moreover, antimicrobial and film-forming properties of mucilage can potentially inhibit microbial growth and reduce oxidation, extending the shelf life. This review emphasizes the advantages of incorporating mucilage into processing and coating strategies for meat and seafood products.


Subject(s)
Food Preservation , Meat Products , Plant Mucilage , Seeds , Seeds/chemistry , Meat Products/analysis , Plant Mucilage/chemistry , Food Preservation/methods , Flax/chemistry , Biopolymers/chemistry , Polysaccharides/chemistry , Animals , Psyllium/chemistry , Food Handling/methods
14.
J Mater Chem B ; 12(27): 6550-6562, 2024 Jul 10.
Article in English | MEDLINE | ID: mdl-38913025

ABSTRACT

The development of diverse types of biomaterials has significantly contributed to bringing new biomedical strategies to treat clinical conditions. Applications of these biomaterials can range from mechanical support and protection of injured tissues to joint replacement, tissue implants, and drug delivery systems. Among the strategies commonly used to prepare biomaterials, the use of electromagnetic radiation to initiate crosslinking stands out. The predominance of photo-induced polymerization methods relies on a fast, efficient, and straightforward process that can be easily adjusted to clinical needs. This strategy consists of irradiating the components that form the material with photons in the near ultraviolet-visible wavelength range (i.e., ∼310 to 750 nm) in the presence of a photoactive molecule. Upon photon absorption, photosensitive molecules can generate excited species that initiate photopolymerization through different reaction mechanisms. However, this process could promote undesired side reactions depending on the target zone or treatment type (e.g., oxidative stress and modification of biomolecules such as proteins and lipids). This review explores the basic concepts behind the photopolymerization process of ex situ and in situ biomaterials. Particular emphasis was put on the photosensitization initiated by the most employed photosensitizers and the photoreactions that they mediate in aqueous media. Finally, the undesired oxidation reactions at the bio-interface and potential solutions are presented.


Subject(s)
Biocompatible Materials , Photosensitizing Agents , Biocompatible Materials/chemistry , Biocompatible Materials/pharmacology , Photosensitizing Agents/chemistry , Photosensitizing Agents/pharmacology , Biopolymers/chemistry , Humans , Cross-Linking Reagents/chemistry , Polymerization , Photochemical Processes , Animals
15.
Environ Sci Pollut Res Int ; 31(25): 36615-36625, 2024 May.
Article in English | MEDLINE | ID: mdl-38750275

ABSTRACT

The present study explored the utilization of Rugulopteryx okamurae (RO), an invasive brown seaweed, as a renewable raw material for plastic materials based on biopolymer blends. The goal of this study was to improve the previously observed poor mechanical properties of materials based on single biopolymer RO. To enhance these properties, two polymers with distinct hydrophobicities were incorporated into the formulation of different blends: hydrophobic polycaprolactone (PCL) and hydrophilic acylated soy protein isolate (SPIa). SPIa was derived from soy protein through a chemical modification process, introducing hydrophilic carboxyl groups. The addition of PCL significantly strengthened the blend, increasing the storage modulus (E'1 Hz) from ~ 110 to ~ 250 MPa. Conversely, SPIa incorporation resulted in softening, with E' values around 40 MPa. Both additives enhanced deformability proportionally to their concentrations, with SPIa exhibiting notably higher deformability, reaching a maximum deformation of ~ 23% for a RO/SPIa ratio of 25/75. In summary, the study demonstrates the feasibility of producing environmentally friendly blend materials based on RO, tailored for specific applications by incorporating suitable additives into the formulation. Therefore, PCL is recommended for applications susceptible to moisture effects, such as packaging, while SPIa is suggested for highly absorbent applications such as personal care or horticulture.


Subject(s)
Hydrophobic and Hydrophilic Interactions , Polyesters , Soybean Proteins , Polyesters/chemistry , Biopolymers/chemistry , Soybean Proteins/chemistry , Seaweed/chemistry
16.
Food Res Int ; 187: 114420, 2024 Jul.
Article in English | MEDLINE | ID: mdl-38763670

ABSTRACT

Vitamins are responsible for providing biological properties to the human body; however, their instability under certain environmental conditions limits their utilization in the food industry. The objective was to conduct a systematic review on the use of biopolymers and lipid bases in microencapsulation processes, assessing their impact on the stability, controlled release, and viability of fortified foods with microencapsulated vitamins. The literature search was conducted between the years 2013-2023, gathering information from databases such as Scopus, PubMed, Web of Science and publishers including Taylor & Francis, Elsevier, Springer and MDPI; a total of 49 articles were compiled The results were classified according to the microencapsulation method, considering the following information: core, coating material, solvent, formulation, process conditions, particle size, efficiency, yield, bioavailability, bioaccessibility, in vitro release, correlation coefficient and references. It has been evidenced that gums are the most frequently employed coatings in the protection of vitamins (14.04%), followed by alginate (10.53%), modified chitosan (9.65%), whey protein (8.77%), lipid bases (8.77%), chitosan (7.89%), modified starch (7.89%), starch (7.02%), gelatin (6.14%), maltodextrin (5.26%), zein (3.51%), pectin (2.63%) and other materials (7.89%). The factors influencing the release of vitamins include pH, modification of the coating material and crosslinking agents; additionally, it was determined that the most fitting mathematical model for release values is Weibull, followed by Zero Order, Higuchi and Korsmeyer-Peppas; finally, foods commonly fortified with microencapsulated vitamins were described, with yogurt, bakery products and gummy candies being notable examples.


Subject(s)
Drug Compounding , Food, Fortified , Vitamins , Vitamins/analysis , Chitosan/chemistry , Biological Availability , Humans , Biopolymers/chemistry , Alginates/chemistry , Whey Proteins/chemistry
17.
Int J Biol Macromol ; 271(Pt 2): 132336, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38744371

ABSTRACT

The current study entails the encapsulation validity to enclose naturally occurring food preservatives, such as cinnamon essential oil (CM), within various wall materials. This approach has demonstrated enhanced encapsulated compounds' stability, efficiency, and bioactivity. The base carrier system consisted of a solid lipid (Berry wax, RW) individually blended with whey protein (WYN), maltodextrin (MDN), and gum Arabic (GMC) as wall materials. The resulting formulations were freeze-dried: WYN/RW/CM, MDN/RW/CM, and GMC/RW/CM. The study comprehensively analyzed encapsulation efficiency, morphology, crystallinity, thermal, and physiochemical properties. When RW was combined with WYN, MDN, and GMC, the microcapsule WYN/RW/CM showed the highest efficiency at 93.4 %, while the GMC/RW/CM exhibited the highest relative crystallinity at 46.54 %. Furthermore, the investigation assessed storage stability, release of bioactive compounds, and oxidative stability during storage at 4 °C/ 25 % RH ± 5 % and 25 °C/40 % RH ± 5 % for 55 days, revealing optimal stability in the WYN/RW/CM microcapsule. Additionally, the antimicrobial activity was assessed at various concentrations of microcapsules, revealing their inhibitory effect against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) bacteria. The WYN/RW/CM microcapsule exhibited the highest inhibition activity in both strains, reaching 40 mm. This study demonstrates that combining WYN with RW as a wall material has greater efficiency in encapsulation and potential uses in various industrial sectors.


Subject(s)
Antioxidants , Capsules , Cinnamomum zeylanicum , Oils, Volatile , Oils, Volatile/chemistry , Oils, Volatile/pharmacology , Antioxidants/chemistry , Antioxidants/pharmacology , Cinnamomum zeylanicum/chemistry , Biopolymers/chemistry , Anti-Infective Agents/pharmacology , Anti-Infective Agents/chemistry , Gum Arabic/chemistry , Drug Stability , Polysaccharides/chemistry , Polysaccharides/pharmacology , Whey Proteins/chemistry , Chemical Phenomena , Staphylococcus aureus/drug effects , Escherichia coli/drug effects , Microbial Sensitivity Tests
18.
Int J Biol Macromol ; 270(Pt 1): 132392, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38754681

ABSTRACT

The most likely materials for use in packaging are plastics. A lot of synthetic polymers are harming the environment. A plasticizer is required for all polymers to improve their characteristics and workability. The plasticizers come in liquid form and are also derived from fossil fuels, which are harmful to the environment. Producing functional and affordable biopolymer for packaging applications is a difficult task nowadays. The preparation of biofilm for packaging using biopolymer and bioplasticizer is the main aim of this work. The biopolymer poly L-lactic acid (PLA) is used, and the bio plasticizer is extracted from Pedalium murex plant. Chemical and mechanical methods are used to extract the plasticizer. Plasticization of polylactic acid biopolymer was done using the extracted plasticizer at additions of 1 %, 2 %, 3 %, 4 %, and 5 %. FT-IR spectroscopy, X-ray diffraction spectroscopy, and surface roughness values are used to characterise the prepared biofilms. Scanning electron spectroscopy pictures are utilised to evaluate the morphological orientation of the biofilms. Strawberries packed with biofilms are used to evaluate the barrier properties of biofilms using UV spectroscopy analysis. Thermal degradation behaviour is investigated using thermo gravimetric analysis. We examined the mechanical characteristics, such as tensile strength, elongation modulus, and elongation break percentage. The plasticizing effect of the plasticizer raises the elongation break percentage while decreasing the tensile strength and modulus. For 2 % plasticizer addition the elongation break increases and the tensile not much affected. To demonstrate biodegradability and microbial resistance, the soil degradation behaviour and antimicrobial activities were examined.


Subject(s)
Biofilms , Food Packaging , Plasticizers , Polyesters , Polyesters/chemistry , Plasticizers/chemistry , Food Packaging/methods , Biofilms/drug effects , Fruit/chemistry , Biopolymers/chemistry , Biopolymers/pharmacology , Tensile Strength , Spectroscopy, Fourier Transform Infrared
19.
Int J Biol Macromol ; 270(Pt 2): 132338, 2024 Jun.
Article in English | MEDLINE | ID: mdl-38763237

ABSTRACT

Extracellular polymeric substances (EPSs) in excess sludge of wastewater treatment plants are valuable biopolymers that can act as recovery materials. However, effectively concentrating EPSs consumes a significant amount of energy. This study employed novel energy-saving pressure-free dead-end forward osmosis (DEFO) technology to concentrate various biopolymers, including EPSs and model biopolymers [sodium alginate (SA), bovine serum albumin (BSA), and a mixture of both (denoted as BSA-SA)]. The feasibility of the DEFO technology was proven and the largest concentration ratios for these biopolymers were 94.8 % for EPSs, 97.1 % for SA, 97.8 % for BSA, and 98.4 % for BSA-SA solutions. An evaluation model was proposed, incorporating the FO membrane's water permeability coefficient and the concentrated substances' osmotic resistance, to describe biopolymers' concentration properties. Irrespective of biopolymer type, the water permeability coefficient decreased with increasing osmotic pressure, remained constant with increasing feed solution (FS) concentration, increased with increasing crossing velocity in the draw side, and showed little dependence on draw salt type. In the EPS DEFO concentration process, osmotic resistance was minimally impacted by osmotic pressure, FS concentration, and crossing velocity, and monovalent metal salts were proposed as draw solutes. The interaction between reverse diffusion metal cations and EPSs affected the structure of the concentrated substances on the FO membrane, thus changing the osmotic resistance in the DEFO process. These findings offer insights into the efficient concentration of biopolymers using DEFO.


Subject(s)
Osmosis , Biopolymers/chemistry , Alginates/chemistry , Serum Albumin, Bovine/chemistry , Permeability , Osmotic Pressure , Water/chemistry , Cattle , Membranes, Artificial , Animals , Water Purification/methods
20.
Waste Manag ; 184: 1-9, 2024 Jul 15.
Article in English | MEDLINE | ID: mdl-38781721

ABSTRACT

Unavoidable food wastes could be an important feedstock for industrial biotechnology, while their valorization could provide added value for the food processor. However, despite their abundance and low costs, the heterogeneous/mixed nature of these food wastes produced by food processors and consumers leads to a high degree of variability in carbon and nitrogen content, as well as specific substrates, in food waste hydrolysate. This has limited their use for bioproduct synthesis. These wastes are often instead used in anaerobic digestion and mixed microbial culture, creating a significant knowledge gap in their use for higher value biochemical production via pure and single microbial culture. To directly investigate this knowledge gap, various waste streams produced by a single food processor were enzymatically hydrolyzed and characterized, and the degree of variability with regard to substrates, carbon, and nitrogen was quantified. The impact of hydrolysate variability on the viability and performance of polyhydroxyalkanoates biopolymers production using bacteria (Cupriavidus necator) and archaea (Haloferax mediterranei) as well as sophorolipids biosurfactants production with the yeast (Starmerella bombicola) was then elucidated at laboratory-scale. After which, strategies implemented during this experimental proof-of-concept study, and beyond, for improved industrial-scale valorization which addresses the high variability of food waste hydrolysate were discussed in-depth, including media standardization and high non-selective microbial organisms growth-associated product synthesis. The insights provided would be beneficial for future endeavors aiming to utilize food wastes as feedstocks for industrial biotechnology.


Subject(s)
Waste Products , Waste Products/analysis , Nitrogen/metabolism , Food , Carbon/metabolism , Polyhydroxyalkanoates/biosynthesis , Hydrolysis , Biotechnology/methods , Surface-Active Agents/metabolism , Biopolymers
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