scholarly journals Properties and Practical Application of Nanoporous Silicate Matrices, Filled with Mixture of NaNO2 and BaTiO3 Ferroelectrics. influence of Co-Encapsulation

2016 ◽  
Vol 17 (4) ◽  
pp. 465-470
Author(s):  
I.I. Grygorchak ◽  
I.M. Budzulyak ◽  
F.O. Ivashchyshyn ◽  
R.Ya. Shvets
Keyword(s):  
Porous Silica ◽  
Electric Energy ◽  
Frequency Dispersion ◽  
Silica Matrix ◽  
Magnetic Media ◽  
Practical Application ◽  
Energy Quantum ◽  
Electric Loss ◽  
Silicate Matrices ◽  
Nanoporous Silicate Matrices

Results of research the characteristics of MCM-41 porous silica matrix, encapsulated into her pores by sodium nitrite and its mix with barium titanate were presented. Nature of changes the impedance frequency dispersion, electric loss tangent and dielectric permittivity of intercalates, synthesized under heating, lighting and magnetic field were identified. The conditions, under which the synthesized nanohibrydes can be interesting in terms of formation the structures of electric energy quantum battery and capacitive apexes for reading information from magnetic media, were found.

Bioencapsulation in Sol-Gel Glasses

1998 ◽  
Vol 519 ◽  
Author(s):  
L. Bergogne ◽  
S. Fennouh ◽  
J. Livage ◽  
C. Roux
Keyword(s):  
Sol Gel ◽  
Porous Silica ◽  
Silica Matrix ◽  
Whole Cells ◽  
The Past ◽  
Wide Range ◽  
Activity Of Enzymes ◽  
Gel Glasses ◽  
Micro Organisms

AbstractBioencapsulation in sol-gel materials has been widely studied during the past decade. Trapped species appear to retain their bioactivity in the porous silica matrix. Small analytes can diffuse through the pores allowing bioreactions to be performed in-situ, inside the sol-gel glass. A wide range of biomolecules and micro-organisms have been encapsulated. The catalytic activity of enzymes is used for the realization of biosensors or bioreactors. Antibody-antigen recognition has been shown to be feasible within sol-gel matrices. Trapped antibodies bind specifically the corresponding haptens and can be used for the detection of traces of chemicals. Even whole cells are now encapsulated without any alteration of their cellular organization. They can be used for the production of chemicals or as antigens for immunoassays.

Katkons in transformer schemes

2016 ◽  
Author(s):  
Бутырин ◽  
P. Butyrin ◽  
Шакирзянов ◽  
F. Shakirzyanov ◽  
Гусев ◽  
...  
Keyword(s):  
Power Factor ◽  
Weak Coupling ◽  
Electric Energy ◽  
Frequency Characteristics ◽  
Practical Application ◽  
Secondary Circuit ◽  
Distributed Parameters ◽  
Resonant Modes ◽  
Current Limiting ◽  
Different Types

Macromodels of transformers with different types of relationships (not only inductance but also capacitance) on the basis of circuits with quasi-distributed parameters simulation were proposed. The analysis of resonant modes and frequency characteristics of transformers on the basis of katkons with identical parameters at the open and closed secondary circuit were obtained. Results of the study will help to evaluate the effectiveness of the practical application of these transformers to improve power factor and efficiency of the transmission, distribution and conversion of electric energy. Using the correct transformers macromodels on the bases of katkons with strong and weak coupling makes possible to realize polyfunctional filter-compensative devices and current-limiting devices with reduced weight and dimensions.

Dielectric properties of mixed NaNO2-KNO3 ferroelectrics in nanoporous silicate matrices

2009 ◽  
Vol 51 (6) ◽  
pp. 1243-1247 ◽  
Author(s):  
S. V. Baryshnikov ◽  
E. V. Charnaya ◽  
A. Yu. Milinskiĭ ◽  
E. V. Stukova ◽  
Cheng Tien ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Silicate Matrices ◽  
Nanoporous Silicate Matrices

scholarly journals Electromagnetic wave tunneling through an asymmetric three-layer structure containing a conductive negative-permittivity layer

2021 ◽  
Vol 26 (2) ◽  
pp. 3-9
Author(s):  
N. Beletskii ◽  
◽  
S. Borysenko ◽  
Keyword(s):  
Electromagnetic Wave ◽  
Numerical Simulations ◽  
Layer Structure ◽  
Frequency Dispersion ◽  
Negative Permittivity ◽  
Tunneling Effect ◽  
Practical Application ◽  
Layer Structures ◽  
Universal Approach ◽  
The Asymmetry

Subject and Purpose. In the context of growing anticipation of fundamentally new optical and radiophysical devices, the present study is concerned with the total electromagnetic wave tunneling through an asymmetric three-layer structure such that contains a conductive negative-permittivity layer. The aim of this work is to recognize how the asymmetry property of this three-layer structure acts on the effect of total wave tunneling with the frequency dispersion of the conductive negative-permittivity layer taken into account. Methods and Methodology. The frequency-dependent conditions of the total electromagnetic wave tunneling through an asymmetric three-layer structure are sought by numerical simulations. A universal approach based on the introduction of dimensionless frequencies and dimensionless layer thicknesses allows us to numerically investigate conditions of the total electromagnetic wave tunneling for any desired frequencies and geometric parameters of the asymmetric three-layer structure. Results. It has been shown that the asymmetry property of the three-layer structure can significantly change the total electromagnetic wave tunneling conditions. It has been demonstrated that parameters of the asymmetric three-layer structure can be selected in such a way as to modify the total electromagnetic wave tunneling conditions toward a desired practical application of the structure. It has been found that a proper choice of the parameters can minimize the action of the three-layer structure asymmetry on the electromagnetic wave tunneling effect. Conclusion. Asymmetric three-layer structures can be of use to effectively change conditions of the total electromagnetic wave tunneling in an effort to provide devices under development with desired characteristics.

Controlled growth of ZnS:Mn nanophosphor in porous silica matrix

2004 ◽  
Vol 96 (11) ◽  
pp. 6700-6705 ◽  
Author(s):  
D. Haranath ◽  
Nitesh Bhalla ◽  
Harish Chander ◽  
Rashmi ◽  
Meenakshi Kar ◽  
...  
Keyword(s):  
Porous Silica ◽  
Silica Matrix ◽  
Controlled Growth

CeO2 nanodots embedded in a porous silica matrix as an active yet durable catalyst for HCl oxidation

2016 ◽  
Vol 6 (13) ◽  
pp. 5116-5123 ◽  
Author(s):  
Xian Chen ◽  
Xihua Xu ◽  
Zhaoyang Fei ◽  
Xingxing Xie ◽  
Jiawei Lou ◽  
...  
Keyword(s):  
Surface Defects ◽  
Porous Silica ◽  
Silica Matrix ◽  
Redox Ability

The nano-sized CeO2 particles (2–4 nm) with significantly rich surface defects and excellent redox ability uniformly embedded in the porous SiO2 matrix exhibit superior and durable activity (1.60 gCl2 gcat−1 h−1) with a time on stream of 100 h.

Design of photochemical materials for carbohydrate production via the immobilisation of whole plant cells into a porous silica matrix

2010 ◽  
Vol 20 (5) ◽  
pp. 929-936 ◽  
Author(s):  
Christophe F. Meunier ◽  
Joanna C. Rooke ◽  
Alexandre Léonard ◽  
Pierre Van Cutsem ◽  
Bao-Lian Su
Keyword(s):  
Porous Silica ◽  
Plant Cells ◽  
Silica Matrix ◽  
Whole Plant
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