Nanostructured cobalt salts and their application in functional food products

2021 ◽  
pp. 495-502
Author(s):  
A.A. Krolevets ◽  
N.I. Myachikova ◽  
O.V. Binkovskaya ◽  
S.G. Glotova ◽  
E.M. Mamaeva ◽  
...  
Keyword(s):  
Functional Food ◽  
Trajectory Analysis ◽  
Particle Trajectory ◽  
Spherical Shape ◽  
Gellan Gum ◽  
Core Shell ◽  
Analysis Method ◽  
Cobalt Sulfate ◽  
Average Size ◽  
Polydispersity Coefficient

The paper provides data on the use of nanostructured cobalt sulfate in the production of marmalade as functional food for prophylactic purposes. The particle trajectory analysis method (NTA method) was used to determine the sizes of nanostructured cobalt sulfate. In this case, the smallest size (25.7 nm) is formed only in gellan gum with a “core : shell” ratio of 1:1. When the “core : shell” ratio in gellan gum is 1:3, the average size of nanocapsules is 49.9 nm. This result can be explained by the tighter packing of cobalt sulfate in the capsule. In sodium alginate, the average nanocapsule size is already 191 nm. The polydispersity coefficient in all studied shells and at different “core : shell” ratios are practically equal and amounts to 0.84–1.09, which corresponds to a spherical shape.

Nanostructured nickel sulphate: properties and applications in marmalade production

2021 ◽  
pp. 738-745
Author(s):  
A.A. Krolevets ◽  
S.G. Glotova ◽  
E.M. Mamaeva ◽  
K.V. Golubkova
Keyword(s):  
Sodium Alginate ◽  
Functional Food ◽  
Nickel Sulfate ◽  
Spherical Shape ◽  
Food Product ◽  
Gellan Gum ◽  
Nanoparticle Tracking Analysis ◽  
Nickel Sulphate ◽  
Cobalt Sulfate ◽  
Average Size

The paper presents the data on the use of nanostructured nickel sulfate in the production of marmalade as a functional food product for prophylactic purposes. The nanoparticle tracking analysis (NTA method) was used to determine the size of nanostructured nickel sulfate. In this case, the smallest size (25.7 nm) is formed only in gellan gum with a core:shell ratio of 1:1. When the core:shell ratio in gellan gum is 1:3, the average size of nanocapsules is 49.9 nm. This result can be explained by the tighter packing of cobalt sulfate in the capsule. In sodium alginate, the average nanocapsule size is already 191 nm. The polydispersity index in all studied shells and at different core:shell ratios are practically equal and amounts to 0.84–1.09, which corresponds to a spherical shape.

scholarly journals Facile Synthesis of Carboxymethyl Cellulose Coated Core/Shell SiO2@Cu Nanoparticles and Their Antifungal Activity against Phytophthora capsici

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 888
Author(s):  
Nguyen Thi Thanh Hai ◽  
Nguyen Duc Cuong ◽  
Nguyen Tran Quyen ◽  
Nguyen Quoc Hien ◽  
Tran Thi Dieu Hien ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Carboxymethyl Cellulose ◽  
Chemical Reduction ◽  
Low Cost ◽  
Phytophthora Capsici ◽  
Reduction Process ◽  
Spherical Shape ◽  
Core Shell ◽  
Cu Nanoparticles ◽  
Average Size

Cu nanoparticles are a potential material for creating novel alternative antimicrobial products due to their unique antibacterial/antifungal properties, stability, dispersion, low cost and abundance as well as being economical and ecofriendly. In this work, carboxymethyl cellulose coated core/shell SiO2@Cu nanoparticles (NPs) were synthesized by a simple and effective chemical reduction process. The initial SiO2 NPs, which were prepared from rice husk ash, were coated by a copper ultrathin film using hydrazine and carboxymethyl cellulose (CMC) as reducing agent and stable agent, respectively. The core/shell SiO2@Cu nanoparticles with an average size of ~19 nm were surrounded by CMC. The results indicated that the SiO2@Cu@CMC suspension was a homogenous morphology with a spherical shape, regular dispersion and good stability. Furthermore, the multicomponent SiO2@Cu@CMC NPs showed good antifungal activity against Phytophthora capsici (P. capsici). The novel Cu NPs-based multicomponent suspension is a key compound in the development of new fungicides for the control of the Phytophthora disease.

Synthesis and Characterization of SiO2@Y2MoO6:Eu3+ Core–Shell Structured Spherical Phosphors by Sol–Gel Process

2016 ◽  
Vol 16 (4) ◽  
pp. 3914-3920 ◽  
Author(s):  
G. Z Li ◽  
F. H Liu ◽  
Z. S Chu ◽  
D. M Wu ◽  
L. B Yang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Annealing Temperature ◽  
Uv Light ◽  
Sol Gel ◽  
Spherical Shape ◽  
Core Shell ◽  
X Ray ◽  
Transmission Electron ◽  
Sol Gel Process ◽  
Average Size

SiO2@Y2MoO6:Eu3+ core–shell phosphors were prepared by the sol–gel process. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectra (EDS), transmission electron microscopy (TEM), photoluminescence (PL) spectra as well as kinetic decays were used to characterize the resulting SiO2@Y2MoO6:Eu3+ core–shell phosphors. The XRD results demonstrated that the Y2MoO6:Eu3+ layers on the SiO2 spheres crystallized after being annealed at 700 °C and the crystallinity increased with raising the annealing temperature. The obtained core–shell phosphors have spherical shape with narrow size distribution (average size ca. 640 nm), non-agglomeration, and smooth surface. The thickness of the Y2MoO6:Eu3+ shells on the SiO2 cores could be easily tailored by varying the number of deposition cycles (70 nm for four deposition cycles). The Eu3+ shows a strong PL emission (dominated by 5D0–7F2 red emission at 614 nm) under the excitation of 347 nm UV light. The PL intensity of Eu3+ increases with increasing the annealing temperature and the number of coating cycles.

Nanostructured motherwort extract and its use in ice-cream production

2020 ◽  
pp. 10-16
Author(s):  
А.А. Krolevets ◽  
N.I. Myachikova ◽  
S.G. Glotova ◽  
K.M. Semichev ◽  
Ye.M. Mamayeva
Keyword(s):  
Sodium Alginate ◽  
Carboxymethyl Cellulose ◽  
Functional Food ◽  
Ice Cream ◽  
Food Product ◽  
Sodium Carboxymethyl Cellulose ◽  
Nanoparticle Tracking Analysis ◽  
Analysis Method ◽  
Average Size ◽  
Konjac Gum

The paper presents data on the use of nanostructured motherwort extract in ice-cream production to be used as a functional food product for preventive purposes. Using the Nanoparticle Tracking Analysis method (NTA method), we determined nanostructured motherwort extract sizes, depending, to a large extent, on the membrane. Thus, the size of motherwort extract nanocapsules greatly depends on the carbohydrate membrane nature: 10% of nanocapsules are from 63 to 88 nm, only in sodium alginate particles are smaller 3 25 nm. The smallest average nanocapsule size is 192 nm in konjac gum, the average 227.00-249.80 nm in carrageenan and sodium alginate, respectively, the highest average size (322 nm) is in sodium carboxymethyl cellulose.

The properties of nanostructured dry extract of bergenia (bergenia crassifolia) and its use in the production of functional food products

2021 ◽  
pp. 519-529
Author(s):  
A.A. Krolevets ◽  
N.I. Myachikova ◽  
O.V. Binkovskaya ◽  
S.G. Glotova ◽  
K.M. Semichev ◽  
...  
Keyword(s):  
Sodium Alginate ◽  
Functional Foods ◽  
Guar Gum ◽  
Spherical Shape ◽  
Sodium Carboxymethylcellulose ◽  
Dry Extract ◽  
Bergenia Crassifolia ◽  
Average Size ◽  
Kappa Carrageenan ◽  
Polydispersity Coefficient

The paper presents the properties of a nanostructured dry extract of bergenia (self-organization and the size of nanocapsules are determined using the NTA method). The smallest average size is 118 nm in kappa-carrageenan, and the largest is 273 nm in sodium alginate with a “core : shell” ratio of 1:1. With regard to the polydispersity coefficient, it was shown that in sodium alginate, guar gum and kappacarrageenan it is 2.73–6.58, which corresponds to the ellipsoid form, while in sodium carboxymethylcellulose this coefficient is 1.1–1.3, which corresponds to a spherical shape, although the dimensions themselves are much larger. The resulting compounds have been used in a variety of functional foods.

Nanostructured dry extract of aloe vera: properties and applications in the production of functional foods

2021 ◽  
pp. 682-693
Author(s):  
A.A. Krolevets ◽  
N.I. Myachikova ◽  
O.V. Binkovskaya ◽  
S.G. Glotova ◽  
K.M. Semichev ◽  
...  
Keyword(s):  
Functional Food ◽  
Xanthan Gum ◽  
Functional Foods ◽  
Aloe Vera ◽  
Spherical Shape ◽  
Food Products ◽  
Polydispersity Index ◽  
Self Organization ◽  
Dry Extract ◽  
Average Size

The paper presents the properties of a nanostructured dry extract of badan (self-organization and the size of nanocapsules are determined using the NTA method). The polydispersity index in carrageenan is 0.61–1.096 in agar-agar and xanthan gum, respectively, which suggests that nanocapsules of dry aloe extract approach a spherical shape in this case. The average size of nanocapsules is in the range of 68–160 nm. The obtained compounds were used in various functional food products.

Synthesis and Characterization of Monodisperse Spherical SiO2@Y2O3: Tb3+ Particles with Core-Shell Structure

2014 ◽  
Vol 997 ◽  
pp. 317-320 ◽  
Author(s):  
Huan Wang ◽  
Ya Bing Liu ◽  
Ling Wei Kong
Keyword(s):  
Smooth Surface ◽  
Annealing Temperature ◽  
Sol Gel ◽  
Spherical Shape ◽  
Core Shell ◽  
The Core ◽  
Sol Gel Process ◽  
Shell Particles ◽  
Average Size

Spherical submicron SiO2 particles have been coated with luminescent Y2O3: Tb3+ layers by a Pechini sol-gel process, resulting in the formation of SiO2@Y2O3: Tb3+ core-shell particles. The obtained core–shell phosphors have perfect spherical shape with narrow size distribution (average size ca. 450 nm), smooth surface and non-agglomeration. The thickness of shells could be easily controlled by changing the number of deposition cycles (35 nm for two deposition cycles). Under the excitation of ultraviolet, the Tb3+ ion mainly shows its characteristic emissions in the core-shell particles from Y2O3: Tb3+) shells. The emission intensity of Tb3+ can be tuned by the annealing temperature and the number of coating cycles.

Formation of Core-Shell Nanoparticles by Laser Ablation of Copper and Brass in Liquids

2005 ◽  
Vol 106 ◽  
pp. 23-26 ◽  
Author(s):  
P.V. Kazakevich ◽  
A.V. Simakin ◽  
V.V. Voronov ◽  
G.A. Shafeev ◽  
D. Starikov ◽  
...  
Keyword(s):  
Core Shell ◽  
Copper Vapour Laser ◽  
Shell Nanoparticles ◽  
Liquid Environment ◽  
Pulsed Nd:Yag Laser ◽  
Plasmon Peak ◽  
Average Size ◽  
Core Shell Nanoparticles ◽  
20 Nm ◽  
Surrounding Liquid

Experimental results are presented on the ablation of copper and brass targets in a liquid environment: ethanol, acetone, or water by irradiation with either a pulsed copper vapour laser (0.51 μm) or a pulsed Nd:YAG laser (1.06 μm). The ablated material was ejected into the surrounding liquid as nanoparticles of average size 20 nm. The nanoparticle composition depends on the nature of the liquid. Ablation of 60%Cu, 40%Zn brass in ethanol results in formation of core-shell nanoparticles. Brass nanoparticles were characterized by a well-defined plasmon peak at 510-520 nm.

scholarly journals Susceptibility Pattern of Caspofungin-Coated Gold Nanoparticles against Clinically Important Candida Species

2020 ◽  
Author(s):  
Zahra Salehi ◽  
Azam Fattahi ◽  
Ensieh lotfali ◽  
Abdolhassan Kazemi ◽  
Ali Shakeri-Zadeh ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Gold Nanoparticles ◽  
Cell Wall ◽  
Candida Species ◽  
Spherical Shape ◽  
Sem Analysis ◽  
Antifungal Drugs ◽  
Wall Structure ◽  
Candida Spp ◽  
Average Size

Purpose: The present study was performed to examine whether caspofungin-coated gold nanoparticles (CAS-AuNPs) may offer the right platform for sensitivity induction in resistant isolates. Methods: For the purpose of the study, a total of 58 archived Candida species were enrolled in the research. The identification of Candida spp. was performed using polymerase chain reaction-restriction fragment length polymorphism and HWP1 gene amplification approaches. The conjugated CAS-AuNPs were synthesized and then characterized using transmission electron microscopy (TEM) and Zetasizer system to determine their morphology, size, and charge. Furthermore, the efficacy of CAS, CAS-AuNPs conjugate, and AuNPs against Candida spp. was assessed based on the Clinical and Laboratory Standards Institute M60. Finally, the interaction of CAS-AuNPs with Candida element was evaluated via scanning electron microscopy (SEM). Results: According to the TEM results, the synthesized CAS-AuNPs had a spherical shape with an average size of 20 nm. The Zeta potential of CAS-AuNPs was -38.2 mV. Statistical analyses showed that CAS-AuNPs could significantly reduce the minimum inhibitory concentration against C. albicans (P=0.0005) and non-albicans Candida (NAC) species (P<0.0001). All isolates had a MIC value of ≥ 4 µg/ml for CAS, except for C. glabrata. The results of SEM analysis confirmed the effects of AuNPs on the membrane and cell wall structure of C. globrata exposed to CAS-AuNPs, facilitating the formation of pores on the cell wall and finally cell death. Conclusion: The findings revealed that CAS-AuNPs conjugates had significant antifungal effects against Candida spp. through the degradation of the membrane and cell wall integrity. Therefore, it can be concluded that the encapsulation of antifungal drugs in combination with NPs not only diminishes side effects but also enhances the effectiveness of the medications.

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