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Search for "alginate" in Full Text gives 33 result(s) in Beilstein Journal of Nanotechnology.
Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity
Beilstein J. Nanotechnol. 2023, 14, 781–792, doi:10.3762/bjnano.14.64
- ionotropic gelation utilizing the biodegradable saccharides lactose (Lac) and alginate (Alg). The lactose reduced silver ions to form AgNPs. The crystallite structure of the nanocomposite AgNPs@Lac/Alg, with a mean size of 4–6 nm, was confirmed by analytical techniques. The nanocomposite exhibited high
- activity. These findings suggest that this nanocomposite has the potential to be tailored for specific applications in environmental and medicinal treatments, making it a highly promising material. Keywords: alginate; bacterial activity; catalysis; lactose; silver nanoparticles; synthesis; Introduction
- an in situ reduction process that requires no additional chemicals [16][17]. This technique using polysaccharides such as alginate [18] or chitosan [19] in conjunction with reducing agents enhanced cost efficiency and reduced the amounts of impurities or toxic compounds. AgNPs are widely used as
Nanoarchitectonics to entrap living cells in silica-based systems: encapsulations with yolk–shell and sepiolite nanomaterials
Beilstein J. Nanotechnol. 2023, 14, 522–534, doi:10.3762/bjnano.14.43
- microorganisms, that is, cyanobacteria and yeast cells, have been immobilized in silica and silicate-based substrates organized as nanostructured materials. In a first attempt, matrices based on bionanocomposites of chitosan and alginate incorporating sepiolite clay mineral and shaped as films, beads, or foams
- entrapment of microalgal species such as Chlorella vulgaris and Anabaena PCC7120 allowing for more than two months of viability [38]. In the present work, various bionanocomposites based on the combination of alginate and/or chitosan and sepiolite have been prepared and processed in different conformations
- to be tested as immobilization matrices of microalgae. Sepiolite–alginate beads, sepiolite–chitosan/alginate thin films, and sepiolite–chitosan foams were produced (Figure 1). Sepiolite and biopolymer concentration, synthesis temperature, and microorganism concentration were modified to study their
Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities
Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31
- , caffeic acid has also been reported to have antiviral, anticoagulant, anti-inflammatory, antibacterial, and anticancer activities [31][32][33][34]. Silver nanoparticles are an important example of different types of nanomaterials (copper, zinc, titanium, magnesium, gold, and alginate) that have been
Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration
Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92
- . Different kinds of polymeric materials have been utilized including chitosan, alginate, fucoidan, carrageenan, and ulvan from natural polymeric materials. Polycaprolactone (PCL), poly ᴅ,ʟ-lactic-co-glycolic acid (PLGA), and polylactic acid (PLA) have been extensively studied with hydroxyapatite to develop
- properties against Escherichia coli and Staphylococcus aureus were obtained [87]. In another study, Lu et al. (2018) developed a scaffolding system of copper ions incorporated in carboxymethyl chitosan and alginate for bone tissue repair. The porous size of the scaffolds was in the range of 45 to 107 μm and
- activity was increased. In addition, Alizarin red S staining tests detected the development of mineralized nodules [81]. On the Ti substrate, TiO2 nanotubes carrying a gentamicin drug mixture were deposited. Furthermore, a combination of alginate and chitosan was utilized to cover the TiO2–gentamicin
Ciprofloxacin-loaded dissolving polymeric microneedles as a potential therapeutic for the treatment of S. aureus skin infections
Beilstein J. Nanotechnol. 2022, 13, 517–527, doi:10.3762/bjnano.13.43
- attributed to the shrinkage of the polymer gel upon drying as suggested by previous studies [32][33]. A similarly faceted shape of microneedles was observed with polymeric microneedles made of chitosan and alginate [34]. Also, a similar microneedle shape was obtained using hydroxypropyl methyl cellulose and
Micro- and nanotechnology in biomedical engineering for cartilage tissue regeneration in osteoarthritis
Beilstein J. Nanotechnol. 2022, 13, 363–389, doi:10.3762/bjnano.13.31
- scaffold by mixing them into the scaffold structure. Once incorporated, they provide new properties and possibly improve physical characteristics. In a study of in vitro and in vivo MSC chondrogenesis [26], the researchers encapsulated TGF-β3 in alginate microspheres coated with biofilm and subsequently
- using separate loading systems may provide desirable kinetics for the sequential controlled release of growth factors. In line with this, a two-growth-factor system consisting of TGF-β2-loaded NPs encapsulated in a BMP-7-loaded alginate hydrogel enabled a slower release of TGF-β2 and a faster release of
- improve the expression of the chondrogenic phenotype [110]. Fragmented PLA fibers incorporated into HA-grafted alginate hydrogel have been shown to increase the compressive modulus by approximately 81% compared to the nanofiber-free hydrogel scaffolds. Moreover, they maintained the round phenotype of the
Engineered titania nanomaterials in advanced clinical applications
Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15
- alginate, gelatin, and chitosan to enhance strength and durability [70]. In another strategy to improve the bioactivity of titania scaffolds, alkaline phosphatase (ALP) was functionalized onto 3D TiO2 scaffolds based on a simple dip-coating method. ALP catalyzes the hydrolysis of organic phosphate that
A comprehensive review on electrospun nanohybrid membranes for wastewater treatment
Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10
- mixture of PVA, sodium alginate, and PEO with incorporated nano-sized ZSM5 zeolite, which contains hydroxy functional groups (HZSM5). The maximum adsorption values of Th4+ and U6+ ions were found to be 274.6 and 144.7 mg/g, respectively, at a HZSM5 content of 10 wt %, an adsorbent dosage of 1 g/L, and pH
Use of nanosystems to improve the anticancer effects of curcumin
Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78
- treatments were significantly effective antiproliferative agents in concentrations of 12.5–100 μM, while the empty system (without CUR) showed no effect or potential toxicity. Subsequent experiements incorporated the nanoemulsion into an alginate microgel, which the authors argue may be useful as controlled
- . Results showed that cells readily internalized MNP by endocytosis, which simultaneously allowed for imaging the affected cells [132]. Other report showed that, using the same breast cancer cells, alginate/chitosan MNP had a 3–6-fold increase in cellular uptake, as compared to F-CUR [133]. This has been
- promising application of gold nanostructures with CUR-loaded alginate microgels, which showed photothermal properties. High CUR retention and preferential toxicity against cancerous cells was also shown. The photoactive agent, wavelength, time of exposure, and distance to the light source are important
Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications
Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64
The impact of molecular tumor profiling on the design strategies for targeting myeloid leukemia and EGFR/CD44-positive solid tumors
Beilstein J. Nanotechnol. 2021, 12, 375–401, doi:10.3762/bjnano.12.31
Plant growth regulation by seed coating with films of alginate and auxin-intercalated layered double hydroxides
Beilstein J. Nanotechnol. 2020, 11, 1082–1091, doi:10.3762/bjnano.11.93
- auxin 1-naphthalenoacetic acid (ZnAl-NAA-LDH), (ii) the coating of bean seeds (Phaseolus vulgaris L.) with composite films produced from mixtures of alginate polymer and ZnAl-NAA-LDH, and (iii) the evaluation of the plant response by bioassays. The hybrid ZnAl-NAA-LDH was characterized by a set of
- germination rate and germination speed index of the seeds, as well as biometric analyses including measurements of root area, root fresh matter, and shoot length of the plants. The bioassay performed in soil pots showed that the alginate film containing ZnAl-NAA-LDH yields an enhancement regarding root area
- , fresh root matter and shoot length of plants. Thus, films produced from a mixture of alginate and the hybrid material containing the growth regulator intercalated into LDH can be a viable alternative to enhance plant development, which can be included in seed management. Keywords: bioassays
Wet-spinning of magneto-responsive helical chitosan microfibers
Beilstein J. Nanotechnol. 2020, 11, 991–999, doi:10.3762/bjnano.11.83
- polysaccharides such as alginate, hyaluronic acid or chitosan, are widely used as biocompatible materials since they are biochemically similar to the native extracellular matrix (ECM) [16]. Chitosan is a biopolymer that combines excellent biocompatibility, low toxicity and antibacterial properties with a low
- of nanometers to a few micrometers [21]. Blends of chitosan with alginate, silk, fibroin, cellulose or collagen can also be processed into composite fibers by electrospinning [22]. Wet-spinning is another well-established method of fabricating chitosan fibers with a diameter in the micrometer range
- in which freshly-spun alginate fibers containing magnetic nanoparticles were fixed with a magnetized conical tip and rotated around micropillars, acquiring a helical shape with three to four windings [47]. Non-scalable procedures, such as high-temperature synthesis, photolithography or the use of
Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery
Beilstein J. Nanotechnol. 2020, 11, 508–532, doi:10.3762/bjnano.11.41
- drying and spontaneously entrapped water-soluble positively charged rhodamine B molecules similar to wet capsules [33]. PAH/PMA capsules fabricated using an alginate-doped CaCO3 template displayed an interconnected matrix in the interior of hollow capsules, enhancing encapsulation of cationic molecules
- most commonly used method is the movement of cargo from lower to higher concentration via a concentration gradient based diffusion process such as in case of Dox loading in GA cross-linked (chitosan-alginate)5 microcapsules [76]. At low feeding concentrations (e.g., 750 µg/mL), the drug loading was
- cancer cells was achieved through folate-targeted sodium alginate/chitosan capsules. The lipid coating on the PAH/PSS microcapsule surface significantly reduced the permeability of the capsule walls [110]. Alternatively, carbohydrate functionalization has been widely used in hepatic drug delivery systems
The different ways to chitosan/hyaluronic acid nanoparticles: templated vs direct complexation. Influence of particle preparation on morphology, cell uptake and silencing efficiency
Beilstein J. Nanotechnol. 2019, 10, 2594–2608, doi:10.3762/bjnano.10.250
- , typically an inorganic anion of low molecular weight, such as triphosphate (TPP) is used, while in the latter negatively charged polymers, e.g., hyaluronic acid (HA) [11][12] or alginate [13], are commonly used. HA is a particularly interesting component, since its presence allows for a reduced serum
High-tolerance crystalline hydrogels formed from self-assembling cyclic dipeptide
Beilstein J. Nanotechnol. 2019, 10, 1894–1901, doi:10.3762/bjnano.10.184
- hydrogel with crystal features and close-knit three-dimensional network structures. Importantly, the C-WY hydrogel exhibited adjustable rheological properties, excellent stability, and high tolerance under various conditions, including in the presence of charged biopolymers (poly-ʟ-lysine (PLL), alginate
Layered double hydroxide/sepiolite hybrid nanoarchitectures for the controlled release of herbicides
Beilstein J. Nanotechnol. 2019, 10, 1679–1690, doi:10.3762/bjnano.10.163
- for agricultural applications. In order to achieve a more controlled release of the herbicide and to act for several days on the surface of the soil, the hybrid nanoarchitectures were encapsulated in a biopolymer matrix of alginate/zein and shaped into spheres. In in vitro tests carried out in
- in vitro tests of MCPA release, confirming the improvement of retention properties. For a better control in the MCPA release, the hybrid nanoarchitectures were also combined with mixtures of alginate–zein biopolymers [36] to improve the retention properties. Results and Discussion MCPA-LDH/sepiolite
- ], a biopolymer mixture of alginate and zein incorporating the MCPAie-LDH hybrid prepared by ion exchange was able to reduce the initial release of MCPA by approximately 10–15% in the first 8 h. In the current work, the MCPA-LDH/Sep0.5:1_60C nanoarchitecture was selected, as it releases 100% of the
Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices
Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129
- , MWCNTs and poly(vinyl alcohol) [25], sepiolite, graphene nanoplatelets, and biopolymers (e.g., alginate, gelatine) [26] and cellulose or foams of microfibrillated cellulose and starch [47], which exhibit Young’s moduli in the range from 0.1 to 9 GPa. The high stiffness of these materials has been
- conductivity values, i.e., 2700 S·m−1 for alginate, 900 S·m−1 for gelatin, and 300 S·m−1 for poly(vinyl alcohol), and the chitosan matrix discussed here yielded conductivity of 2900 S·m−1 [26]. The increase of the conductivity in chitosan films can tentatively be ascribed to the presence of physically adsorbed
Nanocellulose: Recent advances and its prospects in environmental remediation
Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232
- -based alternatives for wastewater purification. These flocculants are expected to be degradable and prevent secondary pollution to the natural environment. Biopolymer-based flocculants such as chitosan, tannins, cellulose and alginate are attracting wide interest from many researchers. Bio-based
Preparation of micro/nanopatterned gelatins crosslinked with genipin for biocompatible dental implants
Beilstein J. Nanotechnol. 2018, 9, 1735–1754, doi:10.3762/bjnano.9.165
- degree of crosslinking with genipin was achieved. Of note, it was not possible to pattern gelatin on the 100 nm diameter scale using this current method (Figure 1f). In previous studies we have demonstrated that on the 500 nm diameter scale, using the impression of hydrocolloid materials such as alginate
Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction
Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137
- suppressed the electron/hole pair recombination due to which photoreduction of Cr(VI) was increased [167]. Cu/Cu2O-decorated TiO2/alginate beads synthesized by a novel, environmentally friendly polyol process exhibited excellent photoreduction of Cr(VI). The superior performance may be attributed to the
Electrodeposition of reduced graphene oxide with chitosan based on the coordination deposition method
Beilstein J. Nanotechnol. 2018, 9, 1200–1210, doi:10.3762/bjnano.9.111
- and good adsorption capacity [1][2].Graphene has a diverse range of applications in solar cells, hydrogen storage materials, electroluminescent devices and electrode materials [3][4][5]. In particular, graphene or reduced graphene oxide (rGO) and biopolymer (e.g., gellan gum, chitosan, and alginate
Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots
Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157
- environmental applications [12][13]. Carbohydrates such as chitosan [14][15], alginate [16], and agarose [7][17] hydrogels have also been used to incorporate CNDs. Only a very few studies have incorporated CNDs into supramolecular hydrogels obtained from low-molecular-weight gelators (LMWGs). Relative to
Biological and biomimetic materials and surfaces
Beilstein J. Nanotechnol. 2017, 8, 403–407, doi:10.3762/bjnano.8.42
- articles of this Thematic Series, Egorov et al. proposed a relatively simple protocol for 3D printing of complex-shaped biocompatible structures based on sodium alginate and calcium phosphate for bone tissue engineering [24]. The analysis of 3D printed structures shows that they possess large
3D printing of mineral–polymer bone substitutes based on sodium alginate and calcium phosphate
Beilstein J. Nanotechnol. 2016, 7, 1794–1799, doi:10.3762/bjnano.7.172
- Research Centre "Crystallography and Photonics", Russian Academy of Sciences, 2 Pionerskaya St., 142092 Troitsk, Moscow, Russia 10.3762/bjnano.7.172 Abstract We demonstrate a relatively simple route for three-dimensional (3D) printing of complex-shaped biocompatible structures based on sodium alginate and
- alginate; tissue engineering; Introduction 3D printing is one promising methodology for tissue engineering constructions with specific architectonics and properties. It has the attractive advantages of both accurate and reproducible layer-by-layer fabrication of complex-shaped structures [1][2][3][4]. A
- number of biocompatible materials, such as polymers of different nature (both natural and synthetic), as well as a variety of calcium phosphates (CPs) are used for this purpose [2]. In this respect, the alginate-based materials are of particular interest. Alginate (extracellular polysaccharide) is a
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