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Search for "calcium" in Full Text gives 117 result(s) in Beilstein Journal of Nanotechnology.
Changes of structural, magnetic and spectroscopic properties of microencapsulated iron sucrose nanoparticles in saline
Beilstein J. Nanotechnol. 2025, 16, 762–784, doi:10.3762/bjnano.16.59
- changes upon dissolution in saline were tested. For the undissolved sample, calcium alginate microcapsules with irregular shapes were registered via scanning electron microscopy, inside which core–shell nanoparticles were identified by transmission electron microscopy micrographs. Magnetic studies (DC and
- completely dissolved sample. Keywords: calcium alginate; dissolution; iron oxyhydroxide nanoparticles; magnetic properties; saline; spectroscopy; Introduction Hematinic are substances such as iron, vitamin B12, and folic acid that are essential in the production of blood [1]. Iron deficiency drugs, which
- microcapsules. The resolution of the SEM technique is insufficient to recognize iron sucrose nanoparticles. Therefore, it is impossible to determine whether calcium alginate uniformly covers all iron sucrose nanoparticles or if some nanoparticles are on the microcapsule surface. Furthermore, it remains unclear
Synthesis of a multicomponent cellulose-based adsorbent for tetracycline removal from aquaculture water
Beilstein J. Nanotechnol. 2025, 16, 728–739, doi:10.3762/bjnano.16.56
- –124,000, Thermo Scientific Chemicals, USA), GA (50%) (Zhanyun, China), calcium chloride anhydrous (Xilong, China), and zinc sulfate heptahydrate (Xilong, China). All reagents were of analytical grade, and deionized water was used for all experiments. Experimental optimization MODDE 5.0 software was
- their mechanical strength and hydrophobicity. Recent studies have revealed that inorganic salt mixtures, such as zinc chloride and calcium chloride, effectively dissolve cellulose, facilitating the fabrication of cellulose membranes for gas separation and organic pollutant removal [38][39]. Specifically
Colloidal few layered graphene–tannic acid preserves the biocompatibility of periodontal ligament cells
Beilstein J. Nanotechnol. 2025, 16, 664–677, doi:10.3762/bjnano.16.51
- microhardness without compromising biocompatibility [7]. In another work, the formulation of an injectable calcium phosphate cement–chitosan–graphene oxide (GO) composite was found to be effective. This composite fostered the proliferation of human dental pulp stem cells [8]. Despite these promising findings
- applications and dentistry. In future work, we will incorporate the FLG–TA composite into various dental biomaterials, such as sealer resins and calcium silicate cements, to improve their mechanical and physicochemical properties. Experimental Reagents and materials Tannic acid (MW = 1701.20 g·mol−1) and
Polyurethane/silk fibroin-based electrospun membranes for wound healing and skin substitute applications
Beilstein J. Nanotechnol. 2025, 16, 591–612, doi:10.3762/bjnano.16.46
- the injury and helped increase the production of VEGF, which aids in vasculogenesis. At the same time, the heat produced by NIR-II light activated specific ion channels of the nerve cells. These channels were permeable to calcium, and the influx of this ion triggered the release of important growth
Nanomaterials in targeting amyloid-β oligomers: current advances and future directions for Alzheimer's disease diagnosis and therapy
Beilstein J. Nanotechnol. 2025, 16, 561–580, doi:10.3762/bjnano.16.44
- internalized, AβOs activate N-methyl-ᴅ-aspartate-type glutamate receptors (NMDARs) located on neuronal membranes. This activation triggers endoplasmic reticulum (ER) stress through the stimulation of phospholipase C, leading to an influx of calcium ions (Ca2+) into the cytosol [15]. Elevated Ca2+ levels result
- complex, together with the co-activation of the mGluR5 receptor, leads to the activation of intracellular Fyn kinase. This activation causes dysregulation of calcium ion homeostasis, hyperphosphorylation of tau protein, and disruption of synaptic functions. Together, these processes, as depicted in Figure
Zeolite materials with Ni and Co: synthesis and catalytic potential in the selective hydrogenation of citral
Beilstein J. Nanotechnol. 2025, 16, 520–529, doi:10.3762/bjnano.16.40
- 96-900-0630), or CaCl2O4 (calcium hypochlorite, card 96-220-7380). The low nickel and cobalt contents in the CoNiZImp material (Table 1) may limit the detectability of diffraction peaks associated to cobalt and nickel chloride salts on the zeolite support. The contents of cobalt and nickel and other
- calcium cations leaving the zeolite, as proven by XRD. In line with expectations for a natural zeolite, the studied materials exhibited hybrid type-I/IV adsorption isotherms (see Figure S2 in Supporting Information File 1), indicating the presence of both microporous and mesoporous structures. The
Biomimetics and bioinspired surfaces: from nature to theory and applications
Beilstein J. Nanotechnol. 2025, 16, 418–421, doi:10.3762/bjnano.16.32
- scaling on steel surfaces. Using silicone nanofilaments, they achieved 75.5% reduction of calcium carbonate deposition on treated steel samples. While many articles concentrated on using natural designs to inspire technological innovation (biology-push), others took an application-driven (technology-pull
Development of a mucoadhesive drug delivery system and its interaction with gastric cells
Beilstein J. Nanotechnol. 2025, 16, 371–384, doi:10.3762/bjnano.16.28
- , A2033), poloxamer 407 (16758), calcium chloride, and mucin from porcine stomach (M1778) were purchased from Sigma-Aldrich, USA. Sunflower oil and sorbitan monooleate (Span 80) were from TCI Chemicals, USA. For in vitro studies, high-glucose DMEM and Pen-Step solution were purchased from Sartorius
Synthesis and the impact of hydroxyapatite nanoparticles on the viability and activity of rhizobacteria
Beilstein J. Nanotechnol. 2025, 16, 216–228, doi:10.3762/bjnano.16.17
- . Furthermore, they require only small quantities for utilization [8]. Several types of nanoparticles have been employed as carriers for rhizobacteria inoculants, including silica nanoparticles [9], clay nanoparticles [8], carbon nanoparticles [10], zinc oxide nanoparticles [11], and calcium carbonate
- applications. The nHA carrier is hydroxyapatite (Ca10(PO4)6(OH)2) in powder form, comprising the elements calcium, phosphorous, oxygen, and hydrogen. These elements provide nutrients that support the viability of rhizobacteria. Water within the carrier also plays a crucial role in maintaining the viability of
- % similarity to Bacillus altitudinis strain NPB34b. Experimental Nanohydroxyapatite synthesis The synthesis of nHA in this study builds upon previous protocols. Specifically, a mixture containing 2.7925 g of calcium oxide and 3.9663 g of diammonium phosphate (with a Ca/P ratio of 1.67) was dissolved in 100 mL
Nanocarriers and macrophage interaction: from a potential hurdle to an alternative therapeutic strategy
Beilstein J. Nanotechnol. 2025, 16, 97–118, doi:10.3762/bjnano.16.10
- inflammation resolution and tissue repair. In IBD, sustaining the M2 phenotype is particularly challenging because of the pro-ferroptotic microenvironment, which undermines macrophage survival. Zhao et al. addressed this issue by developing calcium carbonate (CaCO3)-mineralized liposomes (CLF) loaded with the
Bioinspired nanofilament coatings for scale reduction on steel
Beilstein J. Nanotechnol. 2025, 16, 25–34, doi:10.3762/bjnano.16.3
- stability on steel. Our study demonstrates the successful coating of stainless steel with SNFs, achieving super-hydrophobicity and resilience under high shear stress and explosion/decompression tests. Scaling experiments reveal a 75.5% reduction in calcium carbonate deposition on SNF-coated steel surfaces
- : bioinspired materials; calcium carbonate; offshore assets; stainless-steel coating; super-hydrophobicity; Introduction Small animals, such as insects, springtails (Collembola), and other hexapods, have distinctly large surface-to-volume ratios. This characteristic imposes significant challenges in terms of
- test. The water contact angle also remains unchanged after the decompression/explosion test (Figure 5D). Scale reduction on SNF-coated steel surfaces The scaling of SNF samples was tested in a flow loop designed for the observation of calcium carbonate scaling at surfaces. Coated and uncoated steel
Liver-targeting iron oxide nanoparticles and their complexes with plant extracts for biocompatibility
Beilstein J. Nanotechnol. 2024, 15, 1593–1602, doi:10.3762/bjnano.15.125
- wash and sterilization in 1% calcium hypochlorite solution (Sigma-Aldrich, Germany), plants were dried to 10% moisture level and ground in a mechanical homogenizer to obtain a homogeneous powder. The method for obtaining T. polium extracts is similar to the extraction method of Ocimum araratum
A biomimetic approach towards a universal slippery liquid infused surface coating
Beilstein J. Nanotechnol. 2024, 15, 1376–1389, doi:10.3762/bjnano.15.111
- reducing the potential for adverse effects. Factor XII, thrombin, and calcium are critical components of the coagulation cascade, and their removal represents a pathway for lowering thrombus formation due to contact with foreign materials. Each of these components has led to different approaches for the
Enhanced catalytic reduction through in situ synthesized gold nanoparticles embedded in glucosamine/alginate nanocomposites
Beilstein J. Nanotechnol. 2024, 15, 1227–1237, doi:10.3762/bjnano.15.99
- Materials The study utilized reagents and chemicals without additional purification. Glucosamine, gold(III) chloride, calcium acetate hydrate, sodium alginate, sodium tetrahydroborate, 2-nitrophenol, 4-nitrophenol, and methyl orange were procured from Acros Scientific (Belgium). Distilled water was used
- throughout the experimentation. Preparation of nanocomposites The preparation of the blank GluN/Alg nanocomposite involved an ionotropic gelation as outlined in our recent work [25]. In brief, calcium acetate aqueous solution (7.18 mL; 583 mg·mL−1) was gradually mixed with sodium alginate aqueous solution
- and 3.60 keV confirmed the presence of gold and calcium in the sample [36][37]. The identification of calcium reaffirms the formation of cross-links within the nanocomposite. Calculations revealed an average gold fraction of 17.4% (w/w) in the nanocomposite. This high concentration of gold
Unveiling the potential of alginate-based nanomaterials in sensing technology and smart delivery applications
Beilstein J. Nanotechnol. 2024, 15, 1077–1104, doi:10.3762/bjnano.15.88
- and polymer in the presence of divalent ions such as calcium or zinc. The microemulsion protocol is another technique that can be used to prepare alginate nanoparticles. The hydrogel formation method is yet another method for preparing alginate–polymer nanoparticles [56]. Another method for preparing
- alginate–polymer nanoparticles involves the use of oil-in-water emulsions in polymer and calcium alginate solutions to prepare polymer NPs and calcium alginate NPs separately [57]. Characterization techniques of alginate-based nanoparticles Characterization techniques play a crucial role in analyzing
- alginate–CuO–glucose oxidase-based biosensor for glucose detection, which demonstrated high repeatability and long-term stability. Another research used horseradish peroxidase coated in calcium alginate beads to detect hydrogen peroxide in ambient water samples [127]. Ionotropic alginate hydrogel
Interface properties of nanostructured carbon-coated biological implants: an overview
Beilstein J. Nanotechnol. 2024, 15, 1041–1053, doi:10.3762/bjnano.15.85
- be achieved by replacing GO with a mixture of nanostructured calcium carbonate and rGO [156] or fluorohydroxyapatite and GO [157]. Guo et al. [158] also proved the ability of GO coatings to prevent the release of Ni(II) ions from a nickel–titanium alloy during corrosion. The authors suggested that
Can neutral clusters: a two-step G0W0 and DFT benchmark
Beilstein J. Nanotechnol. 2024, 15, 1010–1016, doi:10.3762/bjnano.15.82
- /bjnano.15.82 Abstract Electronic and structural properties of calcium clusters with a varying size range of 2–20 atoms are studied using a two-step scheme within the GW and density functional theory (DFT) with generalized gradient approximation (GGA). The GGA overestimates the binding energies, optimized
- geometries, electron affinities, and ionization potentials reported in the benchmark. The ground-state structure geometry and binding energy were obtained from the DFT for the ground-state structure of each cluster. The binding energy of the neutral clusters of the calcium series follows an increasing trend
- , except for a few stable even and odd clusters. The electronic properties of the calcium cluster were studied with an all-electron FHI-aims code. In the G0W0 calculation, the magic cluster Ca10 has relatively high ionization potential and low electron affinity. The obtained ionization potentials from the
Electrospun nanofibers: building blocks for the repair of bone tissue
Beilstein J. Nanotechnol. 2024, 15, 941–953, doi:10.3762/bjnano.15.77
- of calcium and phosphate and the protection of bone marrow are among the characteristics of bone tissue [9][10]. Bone tissue, which is a special form of connective tissue, consists of cells, fibers, and extracellular matrix; histologically, it can be divided into two bone types, namely, woven bone
- , cancellous bone may support greater mass. Moreover, the metabolic turnover rate of cancellous bone is higher than that of compact bone; therefore, it is more active and has the potential to be rebuilt faster. Also, it acts as a reservoir in regulating the concentration of calcium and other mineral ions in
- -based nanofiber scaffolds for tissue regeneration (Stellenbosch Nanofiber Company, South Africa) [45]. ReBOSSIS consists of β-tricalcium phosphate, PLGA, and silicon-doped calcium carbonate to support bone formation. ReBOSSIS electrospun fibers are distinguished from other market products by a cotton
Curcumin-loaded nanostructured systems for treatment of leishmaniasis: a review
Beilstein J. Nanotechnol. 2024, 15, 37–50, doi:10.3762/bjnano.15.4
- leishmaniasis. Additionally, this molecule produces reactive oxygen species (ROS) and elevates cytosolic calcium. These occur in the exposure of phosphatidylserine to the outer plasma membrane leaflet and DNA fragmentation, causing the death of the leishmaniasis parasite [47][52]. Despite its promising
unDrift: A versatile software for fast offline SPM image drift correction
Beilstein J. Nanotechnol. 2023, 14, 1225–1237, doi:10.3762/bjnano.14.101
- velocity. In Figure 4a,b, we show two consecutive AFM images of a calcium fluoride (111) surface recorded under ultrahigh vacuum conditions. The periodic structures observed in these two raw-data images (see red unit cells in Figure 4a,b) show a striking difference compared to each other and compared to
- the corresponding drift-corrected images are shown on the right side. In all images, the unit cell used for drift correction is shown as a red quadrangle. Images (a–d) show the atomic structure of calcium fluoride (111) recorded with high-resolution AFM in ultrahigh vacuum. Images (e–h) and (j–m) were
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
- reagents were purchased from Acros (Belgium): silver nitrate (AgNO3), methyl orange (MO), rhodamine B (RhB), calcium acetate hydrate, sodium alginate, and sodium tetrahydroborate (NaBH4). Lactose was obtained from Yong Da (China). The chemicals were used without additional purification. Distilled water was
- , an aqueous solution of calcium acetate (14.36 mL; 6.5 mg·mL−1) was slowly added dropwise into an aqueous solution of sodium alginate (40 mL; 7 mg·mL−1) under stirring for 1 h at 1200 rpm. The mixture was allowed to equilibrate overnight. Subsequently, the Alg/Ca2+ spheres were separated by
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
- –biopolymer were assayed. In the case of sepiolite–alginate beads, after homogeneous dispersion, the mixture was introduced into a syringe and slowly introduced dropwise into a calcium bath (CaCl2·2H2O, 6% w/v) to form small alginate droplets that hardened via crosslinking the alginate chains with the calcium
- ions present in the bath. The formed beads were left in the calcium bath for 30 min and then recovered by filtration and washed with distilled water to remove excess calcium chloride. In the case of sepiolite–chitosan materials, the homogeneous suspensions were poured into a 7 cm diameter Petri dish
A novel approach to pulsed laser deposition of platinum catalyst on carbon particles for use in polymer electrolyte membrane fuel cells
Beilstein J. Nanotechnol. 2023, 14, 190–204, doi:10.3762/bjnano.14.19
- (absolute) pressure in an argon atmosphere. After thermal ignition, a mixture of magnesium and calcium formate powders (mixed with a 6:1 molar ratio) reacted vigorously in a self-propagating high-temperature regime, giving rise to MgO/CaO and carbon as the main solid-state products. After the reaction, a
- strong exothermic redox reaction (self-propagating high-temperature synthesis, SHS) between pulverized anhydrous calcium formate and magnesium powder (all reagents purchased from Sigma-Aldrich, United States). Pulsed laser deposition of platinum on the carbon supports The platinum catalyst was deposited
Hydroxyapatite–bioglass nanocomposites: Structural, mechanical, and biological aspects
Beilstein J. Nanotechnol. 2022, 13, 1490–1504, doi:10.3762/bjnano.13.123
- high glass solubility will provide an enhanced delivery of these elements, which are important for bone formation [24][27][28][29]. Boron was shown to promote the formation of amorphous calcium phosphate, which is beneficial for normal metabolism and bone tissue repair; besides, the addition of B2O3 to
- the incipient stage of calcium phosphate precipitation after 3 days of soaking (Figure 7a). In contrast, HAP-based composites did not exhibit any precipitate at the surface after 3 days of soaking (Figure 7b). This can be the result of the more porous structure of HAG-based composites (Figure 4a) and
- composites. We did not observe any influence of the glass content (5% or 10%) or sintering temperature (1200 or 1250 °C) on the mineralization capability of the composites. At higher magnification, the evolution of the fine microstructure of the calcium phosphate precipitates with soaking time can be traced
Microneedle-based ocular drug delivery systems – recent advances and challenges
Beilstein J. Nanotechnol. 2022, 13, 1167–1184, doi:10.3762/bjnano.13.98
- ], calcium sulfate and gelatin [135], gelatin and hydroxyapatite [136], and PLGA microparticles combined with PLA [137] are available in the scientific literature. Taking into consideration the shape and geometry of microneedles, they can be categorized as pyramids, cones, arrowheads, cylinders, bullets
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