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Article
Investigation of the Relationship Between the Composition and Photoluminescence Properties of Porous Silicon and Its Porosity
Porous silicon (por-Si) is a complex multiphase material, the composition and functional properties of which greatly depend on the features of its formation. In this work, samples of porous silicon with porosi...
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Article
Chitosan and Chitosan Succinate as Photoprotectors for Papain Immobilized on Their Matrix
It has been established that UV radiation in doses of 453–6040 J/m2 has an effect on the decrease in the specific activity of free papain. Adsorption immobilization on a matrix of medium-molecular (200 kDa), high...
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Article
Trypsin Immobilization on Poly(N-Vinylcaprolactam) and Its Copolymers with N-Vinylimidazole
Poly(N-vinylcaprolactam) and its copolymers with N-vinylimidazole were studied as carriers for trypsin immobilization. Trypsin immobilization on poly(N-vinylcaprolactam) was shown to have practically no effect on...
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Article
A Chitosan Matrix as a Photomodulator for Bromelain
We report here that exposure to UV radiation at a dose of 151 J/m2 increased the activity of free bromelain (EC 3.4.22.4) by 86%, while UV radiation at a dose of 6040 J/m2 caused a decrease in its catalytic activ...
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Article
Chitosan as Photo Protector for Papain Immobilized on Its Matrix
It has been demonstrated that exposure of papain to UV radiation at doses of 453–6040 J/m2 results in a decrease in its catalytic activity. Immobilization on the chitosan matrix leads to the improved stability of...
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Article
Characterization of Functional Nanofilms on InP by Ultrasoft X-ray Emission and Infrared Spectroscopies
The thermal oxidation of InP in the presence of both a MnO2 chemical stimulator layer produced on its surface by magnetron sputtering and a Mn3(PO4)2 modifier introduced through the gas phase leads to the formati...
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Article
Studies of the Processes of the Trypsin Interactions with Ion Exchange Fibers and Chitosan
A localization of charged and hydrophobic amino acid residues in the trypsin molecule was studied, and a percentage of the amino acids of different types on a surface of the enzyme globule was determined. The ...
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Article
Synthesis and Optical Properties of Cobalt-Modified Titanium Oxide Films
Properties of polycrystalline TiO2 films modified by magnetron sputtering of cobalt followed by pulsed photon-irradiation processing in air are investigated by methods of X-ray phase analysis, raster electron mic...
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Article
Characteristics of Changes in the Ozone Content in the Upper Stratosphere over Moscow during the Cold Half-Years of 2014–2015 and 2015–2016
The results of ground-based microwave measurements of the stratospheric ozone profiles over Moscow during the cold half-years of 2014–2015 and 2015–2016 are presented. The causes of the observed changes in the...
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Article
Influence of a por-Si Buffer Layer on the Optical Properties of Epitaxial InxGa1 –xN/Si(111) Heterostructures with a Nanocolumnar Film Morphology
Integrated heterostructures exhibiting a nanocolumnar morphology of the InxGa1 –xN film are grown on a single-crystal silicon substrate (c-Si(111)) and a substrate with a nanoporous buffer sublayer (por-Si) by mo...
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Article
Effect of Conditions of Electrochemical Etching on the Morphological, Structural, and Optical Properties of Porous Gallium Arsenide
The properties of porous GaAs samples produced by the electrochemical etching of single-crystal n-GaAs(100) wafers are studied by X-ray diffraction analysis, electron microscopy, and infrared and ultraviolet spec...
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Article
Effect of Misorientation and Preliminary Etching of the Substrate on the Structural and Optical Properties of Integrated GaAs/Si(100) Heterostructures Produced by Vapor Phase Epitaxy
It is shown for the first time that the structural and optical functional characteristics of integrated GaAs/Si(100) heterostructures can be controlled by using misoriented Si(100) substrates and their prelimi...
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Article
Structural and Spectroscopic Investigation of Biomimetic Composites—Promising Agents for the Remineralization of Native Dental Tissue
Biomimetic materials (biocomposites) with an organic-mineral composition related to natural dental tissues (enamel and dentin) are obtained for the first time and their structural and optical characteristics a...
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Article
IR Spectroscopic Study of Interatomic Interaction in [(CoFeB)60C40/SiO2]200 and [(CoFeB)34(SiO2)66/C]46 Multilayer Nanostructures with Metal-Containing Composite Layers
This paper presents an IR spectroscopic study of chemical bonds between components of amorphous [(CoFeB)60C40/SiO2]200 and [(CoFeB)34(SiO2)66/C]46 multilayer nanostructures (MNS’s) made up of metal-containing com...
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Article
Variations in the Ozone Concentration in the Stratosphere over Moscow due to Dunamic Processes in the Cold Period of 2015–2016
New data on variations in vertical distribution of stratospheric ozone overMoscow in the cold half-year of 2015–2016 are presented. This period differed significantly from previous winters in a number of strat...
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Article
Experimental studies of the effects of atomic ordering in epitaxial Ga x In1 – x P alloys on their optical properties
The properties of epitaxial Ga x In1 – x P alloys with an ordered arrangement of atoms in the crystal lattice are studied by a number of spectrosc...
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Article
Influence of strong sudden stratospheric warmings on ozone in the middle stratosphere according to millimeter wave observations
This paper reports the study data on variations in the ozone content in the middle stratosphere over Moscow based on millimeter wavelength observations during a range of midwinter sudden stratospheric warmings...
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Article
Variations in Microwave Radiation of the Nighttime Mesospheric Ozone over Moscow
We consider the instrumentation and methods for the nighttime ground-based measurements of the atmospheric-ozone emission line at a frequency of 142.175 GHz. The ozone-radiation spectra were measured in Moscow...
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Article
Growth features and spectroscopic structure investigations of nanoprofiled AlN films formed on misoriented GaAs substrates
Nanostructured aluminum-nitride films are formed by reactive ion-plasma sputtering onto GaAs substrates with different orientations. The properties of the films are studied via structural analysis, atomic forc...
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Article
Features of interannual variations of ozone in the middle stratosphere over Moscow according to observations at millimeter waves
The features of interannual variations of ozone in the middle stratosphere over Moscow in cold half-years since 1995 to 2015 are considered. These features are most pronounced in two separated groups of winter...
