This page has only limited features, please log in for full access.
Polyvinyl chloride (PVC) is a widely used polymer, not only in industry, but also in our daily life. PVC is a material that can be applied in many different fields, such as building and construction, health care, and electronics. In recent decades, the success of electrospinning technology to fabricate nanofibers has expanded the applicability of polymers. PVC nanofibers have been successfully manufactured by electrospinning. By changing the initial electrospinning parameters, it is possible to obtain PVC nanofibers with diameters ranging from a few hundreds of nanometers to several micrometers. PVC nanofibers have many advantages, such as high porosity, high mechanical strength, large surface area, waterproof, and no toxicity. PVC nanofibers have been found to be very useful in many fields with a wide variety of applications such as air filtration systems, water treatment, oil spill treatment, batteries technology, protective clothing, corrosion resistance, and many others. This paper reviews the fabricating method, properties, applications, and prospects of PVC nanofibers.
Le Quoc Pham; Mayya Uspenskaya; Roman Olekhnovich; Rigel Olvera Bernal. A Review on Electrospun PVC Nanofibers: Fabrication, Properties, and Application. Fibers 2021, 9, 12 .
AMA StyleLe Quoc Pham, Mayya Uspenskaya, Roman Olekhnovich, Rigel Olvera Bernal. A Review on Electrospun PVC Nanofibers: Fabrication, Properties, and Application. Fibers. 2021; 9 (2):12.
Chicago/Turabian StyleLe Quoc Pham; Mayya Uspenskaya; Roman Olekhnovich; Rigel Olvera Bernal. 2021. "A Review on Electrospun PVC Nanofibers: Fabrication, Properties, and Application." Fibers 9, no. 2: 12.
For a long time, the pharmaceutical industry focused on natural biologically active molecules due to their unique properties, availability and significantly less side-effects. Mangiferin is a naturally occurring C-glucosylxantone that has substantial potential for the treatment of various diseases thanks to its numerous biological activities. Many research studies have proven that mangiferin possesses antioxidant, anti-infection, anti-cancer, anti-diabetic, cardiovascular, neuroprotective properties and it also increases immunity. It is especially important that it has no toxicity. However, mangiferin is not being currently applied to clinical use because its oral bioavailability as well as its absorption in the body are too low. To improve the solubility, enhance the biological action and bioavailability, mangiferin integrated polymer systems have been developed. In this paper, we review molecular mechanisms of anti-cancer action as well as a number of designed polymer-mangiferin systems. Taking together, mangiferin is a very promising anti-cancer molecule with excellent properties and the absence of toxicity.
Svetlana N. Morozkina; Thi Hong Nhung Vu; Yuliya E. Generalova; Petr P. Snetkov; Mayya V. Uspenskaya. Mangiferin as New Potential Anti-Cancer Agent and Mangiferin-Integrated Polymer Systems—A Novel Research Direction. Biomolecules 2021, 11, 79 .
AMA StyleSvetlana N. Morozkina, Thi Hong Nhung Vu, Yuliya E. Generalova, Petr P. Snetkov, Mayya V. Uspenskaya. Mangiferin as New Potential Anti-Cancer Agent and Mangiferin-Integrated Polymer Systems—A Novel Research Direction. Biomolecules. 2021; 11 (1):79.
Chicago/Turabian StyleSvetlana N. Morozkina; Thi Hong Nhung Vu; Yuliya E. Generalova; Petr P. Snetkov; Mayya V. Uspenskaya. 2021. "Mangiferin as New Potential Anti-Cancer Agent and Mangiferin-Integrated Polymer Systems—A Novel Research Direction." Biomolecules 11, no. 1: 79.
This paper investigates the mechanical properties of oriented polyvinyl chloride (PVC) nanofiber mats, which, were obtained by electrospinning a PVC solution. PVC was dissolved in a solvent mixture of tetrahydrofuran/dimethylformamide. Electrospinning parameters used in our work were, voltage 20 kV; flow rate 0.5 mL/h; the distance between the syringe tip and collector was 15 cm. The rotating speed of the drum collector was varied from 500 to 2500 rpm with a range of 500 rpm. Nanofiber mats were characterized by scanning electron microscope, thermogravimetric analysis, differential scanning calorimetry methods. The mechanical properties of PVC nanofiber mats, such as tensile strength, Young’s modulus, thermal degradation, and glass transition temperature were also analyzed. It was shown that, by increasing the collector’s rotation speed from 0 (flat plate collector) to 2500 rpm (drum collector), the average diameter of PVC nanofibers decreased from 313 ± 52 to 229 ± 47 nm. At the same time, it was observed that the mechanical properties of the resulting nanofiber mats were improved: tensile strength increased from 2.2 ± 0.2 MPa to 9.1 ± 0.3 MPa, Young’s modulus from 53 ± 14 to 308 ± 19 MPa. Thermogravimetric analysis measurements showed that there was no difference in the process of thermal degradation of nanofiber mats and PVC powders. On the other hand, the glass transition temperature of nanofiber mats and powders did show different values, such values were 77.5 °C and 83.2 °C, respectively.
Quoc Pham Le; Mayya V. Uspenskaya; Roman O. Olekhnovich; Mikhail A. Baranov. The Mechanical Properties of PVC Nanofiber Mats Obtained by Electrospinning. Fibers 2021, 9, 2 .
AMA StyleQuoc Pham Le, Mayya V. Uspenskaya, Roman O. Olekhnovich, Mikhail A. Baranov. The Mechanical Properties of PVC Nanofiber Mats Obtained by Electrospinning. Fibers. 2021; 9 (1):2.
Chicago/Turabian StyleQuoc Pham Le; Mayya V. Uspenskaya; Roman O. Olekhnovich; Mikhail A. Baranov. 2021. "The Mechanical Properties of PVC Nanofiber Mats Obtained by Electrospinning." Fibers 9, no. 1: 2.
Modern drug delivery systems demand the development of targeted polymer-carriers with the set of obligatory requirements. Thus, such capsules must have total biocompatibility, biodegradability, and possess non-allergenic, and non-tumorigenic properties. Hyaluronic acid (HA), as a natural linear polysaccharide that is included in the pericellular and extracellular matrixes, satisfies all these demands in the best possible way. In this study, the biopolymer nanoparticles with an average diameter of 300 nm were successfully obtained from aqueous HA solutions by electrospraying technique and characterized. Due to the presence of active functional groups in the structure of HA, such polymer particles can incorporate various pharmaceutical agents. This finding expands the investigation and subsequent application of drug-loaded nanoparticles based on HA as challenging and advanced targeted delivery systems.
Petr Snetkov; Kseniia Zakharova; Svetlana Morozkina; Mikhail Baranov; Roman Olekhnovich; Mayya Uspenskaya. Electrosprayed Nanoparticles Based on Hyaluronic Acid: Preparation and Characterization. Technologies 2020, 8, 71 .
AMA StylePetr Snetkov, Kseniia Zakharova, Svetlana Morozkina, Mikhail Baranov, Roman Olekhnovich, Mayya Uspenskaya. Electrosprayed Nanoparticles Based on Hyaluronic Acid: Preparation and Characterization. Technologies. 2020; 8 (4):71.
Chicago/Turabian StylePetr Snetkov; Kseniia Zakharova; Svetlana Morozkina; Mikhail Baranov; Roman Olekhnovich; Mayya Uspenskaya. 2020. "Electrosprayed Nanoparticles Based on Hyaluronic Acid: Preparation and Characterization." Technologies 8, no. 4: 71.
Hyaluronic acid, as a natural linear polysaccharide, has attracted researchers’ attention from its initial detection and isolation from tissues in 1934 until the present day. Due to biocompatibility and a high biodegradation of hyaluronic acid, it finds wide application in bioengineering and biomedicine: from biorevitalizing skin cosmetics and endoprostheses of joint fluid to polymeric scaffolds and wound dressings. However, the main properties of aqueous polysaccharide solutions with different molecular weights are different. Moreover, the therapeutic effect of hyaluronic acid-based preparations directly depends on the molecular weight of the biopolymer. The present review collects the information about relations between the molecular weight of hyaluronic acid and its original properties. Particular emphasis is placed on the structural, physical and physico-chemical properties of hyaluronic acid in water solutions, as well as their degradability.
Petr Snetkov; Kseniia Zakharova; Svetlana Morozkina; Roman Olekhnovich; Mayya Uspenskaya. Hyaluronic Acid: The Influence of Molecular Weight on Structural, Physical, Physico-Chemical, and Degradable Properties of Biopolymer. Polymers 2020, 12, 1800 .
AMA StylePetr Snetkov, Kseniia Zakharova, Svetlana Morozkina, Roman Olekhnovich, Mayya Uspenskaya. Hyaluronic Acid: The Influence of Molecular Weight on Structural, Physical, Physico-Chemical, and Degradable Properties of Biopolymer. Polymers. 2020; 12 (8):1800.
Chicago/Turabian StylePetr Snetkov; Kseniia Zakharova; Svetlana Morozkina; Roman Olekhnovich; Mayya Uspenskaya. 2020. "Hyaluronic Acid: The Influence of Molecular Weight on Structural, Physical, Physico-Chemical, and Degradable Properties of Biopolymer." Polymers 12, no. 8: 1800.
Hyaluronic acid, curcumin, and usnic acid are separately utilized as effective biological agents in medicine, and materials based on its blend are considered to have wider therapeutic effects than individual ones. In this study, for the first time, native hyaluronic acid-based fibers containing curcumin and usnic acid with an average diameter of 298 nm were successfully prepared by the electrospinning technique and characterized. Additionally, unstable and hydrophobic curcumin and usnic acid were loaded into the hydrophilic hyaluronic acid matrix without utilizing the activating (catalyzing) agents, resulting in the formation of an electrospinnable solution. Only the binary mixture deionized water—dimethyl sulfoxide (50:50)—was used as solvent. The presence of small amounts of dimethyl sulfoxide in the fibrous materials was expected to provide the materials with local anesthetic and antiseptic activity. The effect of electric voltage on the electrospinning process, diameter, and morphology of hyaluronic acid/curcumin/usnic acid fibers was investigated in detail. The impact of curcumin and usnic acid on the stability of fiber formation was observed. The investigation of fibers based on pure hyaluronic acid without additional polymers and with active pharmaceutical ingredients will lay the groundwork for the development of highly effective wound dressings and new drug delivery scaffolds.
Petr Snetkov; Svetlana Morozkina; Roman Olekhnovich; Thi Hong Nhung Vu; Maria Tyanutova; Mayya Uspenskaya. Curcumin/Usnic Acid-Loaded Electrospun Nanofibers Based on Hyaluronic Acid. Materials 2020, 13, 3476 .
AMA StylePetr Snetkov, Svetlana Morozkina, Roman Olekhnovich, Thi Hong Nhung Vu, Maria Tyanutova, Mayya Uspenskaya. Curcumin/Usnic Acid-Loaded Electrospun Nanofibers Based on Hyaluronic Acid. Materials. 2020; 13 (16):3476.
Chicago/Turabian StylePetr Snetkov; Svetlana Morozkina; Roman Olekhnovich; Thi Hong Nhung Vu; Maria Tyanutova; Mayya Uspenskaya. 2020. "Curcumin/Usnic Acid-Loaded Electrospun Nanofibers Based on Hyaluronic Acid." Materials 13, no. 16: 3476.
Edible films and coatings based on biopolymers to protect and extend the shelf life of food and medicine can be functionalized, by applying a holographic marker on the coating surface for marking products or sensing storage conditions. In this work, holographic markers were prepared on the surface of thin biopolymer coatings based on starch, gelatin, agar and also starch/gelatin and starch/agar blends by the nanoimprint method from a film-forming solution. The morphology of the surface of holographic markers using optical microscopy in reflection mode was examined, as well as the reasons for its formation using an analysis of the flow curves of film-forming solutions. It was found that the surface morphology of the marker strongly depends on the composition, consistency index of film-forming solution and miscibility of the components. It was shown that the starch/agar film-forming solution at the ratio of 70/30 wt.% has a low consistency index value of 21.38 Pa·s0.88, compared to 64.56 Pa·s0.67 for pure starch at a drying temperature of 30 °C, and the components are well compatible. Thus, an isotropic morphology of the holographic marker surface was formed and the value of diffraction efficiency of 3% was achieved, compared to 1.5% for the marker made of pure starch. Coatings without holographic markers were analyzed by tensile strength and water contact angle, and their properties are highly dependent on their composition.
Aleksandr Podshivalov; Alexandra Toropova; Maria Fokina; Mayya Uspenskaya. Surface Morphology Formation of Edible Holographic Marker on Potato Starch with Gelatin or Agar Thin Coatings. Polymers 2020, 12, 1123 .
AMA StyleAleksandr Podshivalov, Alexandra Toropova, Maria Fokina, Mayya Uspenskaya. Surface Morphology Formation of Edible Holographic Marker on Potato Starch with Gelatin or Agar Thin Coatings. Polymers. 2020; 12 (5):1123.
Chicago/Turabian StyleAleksandr Podshivalov; Alexandra Toropova; Maria Fokina; Mayya Uspenskaya. 2020. "Surface Morphology Formation of Edible Holographic Marker on Potato Starch with Gelatin or Agar Thin Coatings." Polymers 12, no. 5: 1123.
The effect of neutral salts on protein conformation was first analyzed by Hofmeister in 1888, however, even today this phenomenon is not completely understood. To clarify this effect, we studied changes in the secondary structure of two proteins: human serum albumin with predominantly α-helical structure and porcine pancreas β-trypsin with the typical β-structural arrangement in aqueous solutions of neutral salts (KSCN, KCl, (NH4)2SO4). The changes in the secondary structure were studied at 23 °C and 80 °C by using the second derivative deconvolution method of the IR spectra. Our results demonstrated that the ability of the salts to stabilize/destabilize these two proteins correlates with the Hofmeister series of ions. At the same time, some exceptions were also observed. The destabilization of the native structures of both α-helical albumin and β-structural trypsin upon interaction with neutral salts leads to the formation of intermolecular β-sheets typical for amyloid fibrils or amorphous aggregates. Thus, our quantitative FTIR-spectroscopy analysis allowed us to further clarify the mechanisms and complexity of the neutral salt actions on protein structures which may lead to strategies preventing unwelcome misfolding of proteins.
Dmitrii Usoltsev; Vera Sitnikova; Andrey Kajava; Mayya Uspenskaya. FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin and Trypsin under Neutral Salts. Biomolecules 2020, 10, 606 .
AMA StyleDmitrii Usoltsev, Vera Sitnikova, Andrey Kajava, Mayya Uspenskaya. FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin and Trypsin under Neutral Salts. Biomolecules. 2020; 10 (4):606.
Chicago/Turabian StyleDmitrii Usoltsev; Vera Sitnikova; Andrey Kajava; Mayya Uspenskaya. 2020. "FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin and Trypsin under Neutral Salts." Biomolecules 10, no. 4: 606.
Polymeric packaging materials are one of the factors of environmental pollution. Reducing the environmental burden is possible by increasing the environmental friendliness of packaging materials. In this work, we study polymer films based on polyvinyl chloride (PVC) with a copolymer of 3-hydroxybutyrate with 3-hydroxyhexanoate P (3-GB) (3-GG) with different component ratios. The process of processing blends in the process of obtaining a packaging film is considered. The optical characteristics of the obtained films are determined. Thermal analysis of the obtained films was carried out using the differential scanning calorimetry (DSC), TGA, and thermomechanical analysis (TMA) methods. The degree of gelling of the resulting mixture was determined. It is shown that PHB has miscibility with PVC.
Evgeniy V. Belukhichev; Vera E. Sitnikova; Evgenia O. Samuylova; Mayya V. Uspenskaya; Daria M. Martynova. Films Based on a Blend of PVC with Copolymer of 3-Hydroxybutyrate with 3-Hydroxyhexanoate. Polymers 2020, 12, 270 .
AMA StyleEvgeniy V. Belukhichev, Vera E. Sitnikova, Evgenia O. Samuylova, Mayya V. Uspenskaya, Daria M. Martynova. Films Based on a Blend of PVC with Copolymer of 3-Hydroxybutyrate with 3-Hydroxyhexanoate. Polymers. 2020; 12 (2):270.
Chicago/Turabian StyleEvgeniy V. Belukhichev; Vera E. Sitnikova; Evgenia O. Samuylova; Mayya V. Uspenskaya; Daria M. Martynova. 2020. "Films Based on a Blend of PVC with Copolymer of 3-Hydroxybutyrate with 3-Hydroxyhexanoate." Polymers 12, no. 2: 270.
Modification of the surface of polyvinyl chloride (PVC) deposited on a copper foil under the influence of nanosecond laser radiation with different peaks fluence was studied by using infrared spectroscopy of attenuated total reflection and optical microscopy. The dependences of the wetting angle of the texture surface with water on the peak fluence of laser radiation were measured. The obtained various relief textures demonstrate a sharp drop in water contact angles from (~ 50o) to super hydrophilic (~ 15o), which allows us to design and fabricate micro-scale elements of laboratory devices for the tasks of bactericidal treatment, collection and removal of liquids, as well as their separation and purification. A stable increase in the contact angles of water with the surface of the textures to hydrophobic (~ up to 140o) observed over time indicates degradation of the polymer coating.
I.V. Krylach; S.I. Kudryashov; R.O. Olekhnovich; V.E. Sitnikova; M.K. Moskvin; N.N. Shchedrina; M.V. Uspenskaya. Fabrication of a Functional Relief on the Surface of a Polyvinyl Chloride Film by Nanosecond Laser Microtexturing-=SUP=-*-=/SUP=-. Журнал технической физики 2020, 128, 1196 .
AMA StyleI.V. Krylach, S.I. Kudryashov, R.O. Olekhnovich, V.E. Sitnikova, M.K. Moskvin, N.N. Shchedrina, M.V. Uspenskaya. Fabrication of a Functional Relief on the Surface of a Polyvinyl Chloride Film by Nanosecond Laser Microtexturing-=SUP=-*-=/SUP=-. Журнал технической физики. 2020; 128 (8):1196.
Chicago/Turabian StyleI.V. Krylach; S.I. Kudryashov; R.O. Olekhnovich; V.E. Sitnikova; M.K. Moskvin; N.N. Shchedrina; M.V. Uspenskaya. 2020. "Fabrication of a Functional Relief on the Surface of a Polyvinyl Chloride Film by Nanosecond Laser Microtexturing-=SUP=-*-=/SUP=-." Журнал технической физики 128, no. 8: 1196.
Hyaluronic acid (HA) is a naturally occurring polymer that is found in variety of tissues and biological fluids. Due to its unique properties such as biodegradability and biocompatibility, HA can be applied in fabrication of nanofibers for tissue engineering and wound healing. Electrospinning as one of the methods of creating such structures allows to obtain fibers and particles with nano- and microscale from polymer solutions utilizing the high voltage power supply. However, the electrospinning process directly depends upon different parameters, including physical characteristics of the polymer solutions. This paper reviews physical properties of aqueous-organic HA solutions considering their suitability for electrospinning
Petr P. Snetkov; ITMO University; Kseniia S. Zakharova; Maria I Tyanutova; Svetlana N. Morozkina; Roman O. Olekhnovich; Mayya V. Uspenskaya. THE STUDY OF THE PHYSICAL PROPERTIES OF AQUEOUS-ORGANIC HYALURONAN ELECTROSPINNING SOLUTIONS. Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 2020, 55, 1 .
AMA StylePetr P. Snetkov, ITMO University, Kseniia S. Zakharova, Maria I Tyanutova, Svetlana N. Morozkina, Roman O. Olekhnovich, Mayya V. Uspenskaya. THE STUDY OF THE PHYSICAL PROPERTIES OF AQUEOUS-ORGANIC HYALURONAN ELECTROSPINNING SOLUTIONS. Bulletin of the Saint Petersburg State Institute of Technology (Technical University). 2020; 55 ():1.
Chicago/Turabian StylePetr P. Snetkov; ITMO University; Kseniia S. Zakharova; Maria I Tyanutova; Svetlana N. Morozkina; Roman O. Olekhnovich; Mayya V. Uspenskaya. 2020. "THE STUDY OF THE PHYSICAL PROPERTIES OF AQUEOUS-ORGANIC HYALURONAN ELECTROSPINNING SOLUTIONS." Bulletin of the Saint Petersburg State Institute of Technology (Technical University) 55, no. : 1.
Nano- and microfibers based on biopolymers are some of the most attractive issues of biotechnology due to their unique properties and effectiveness. Hyaluronan is well-known as a biodegradable, naturally-occurring polymer, which has great potential for being utilized in a fibrous form. The obtaining of fibers from hyaluronan presents a major challenge because of the hydrophilic character of the polymer and the high viscosity level of its solutions. Electrospinning, as the advanced and effective method of the fiber generation, is difficult. The nano- and microfibers from hyaluronan may be obtained by utilizing special techniques, including binary/ternary solvent systems and several polymers described as modifying (or carrying), such as polyethylene oxide (PEO) and polyvinyl alcohol (PVA). This paper reviews various methods for the synthesis of hyaluronan-based fibers, and also collects brief information on the properties and biological activity of hyaluronan and fibrous materials based on it.
Petr Snetkov; Svetlana Morozkina; Mayya Uspenskaya; Roman Olekhnovich. Hyaluronan-Based Nanofibers: Fabrication, Characterization and Application. Polymers 2019, 11, 2036 .
AMA StylePetr Snetkov, Svetlana Morozkina, Mayya Uspenskaya, Roman Olekhnovich. Hyaluronan-Based Nanofibers: Fabrication, Characterization and Application. Polymers. 2019; 11 (12):2036.
Chicago/Turabian StylePetr Snetkov; Svetlana Morozkina; Mayya Uspenskaya; Roman Olekhnovich. 2019. "Hyaluronan-Based Nanofibers: Fabrication, Characterization and Application." Polymers 11, no. 12: 2036.
Human serum albumin (HSA) is the most abundant protein in blood plasma. HSA is involved in the transport of hormones, fatty acids, and some other compounds, maintenance of blood pH, osmotic pressure, and many other functions. Although this protein is well studied, data about its conformational changes upon different denaturation factors are fragmentary and sometimes contradictory. This is especially true for FTIR spectroscopy data interpretation. Here, the effect of various denaturing agents on the structural state of HSA by using FTIR spectroscopy in the aqueous solutions was systematically studied. Our data suggest that the second derivative deconvolution method provides the most consistent interpretation of the obtained IR spectra. The secondary structure changes of HSA were studied depending on the concentration of the denaturing agent during acid, alkaline, and thermal denaturation. In general, the denaturation of HSA in different conditions is accompanied by a decrease in α-helical conformation and an increase in random coil conformation and the intermolecular β-strands. Meantime, some variation in the conformational changes depending on the type of the denaturation agent were also observed. The increase of β-structural conformation suggests that HSA may form amyloid-like aggregates upon the denaturation.
Dmitrii Usoltsev; Vera Sitnikova; Andrey Kajava; Mayya Uspenskaya. Systematic FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin under Various Denaturation Conditions. Biomolecules 2019, 9, 359 .
AMA StyleDmitrii Usoltsev, Vera Sitnikova, Andrey Kajava, Mayya Uspenskaya. Systematic FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin under Various Denaturation Conditions. Biomolecules. 2019; 9 (8):359.
Chicago/Turabian StyleDmitrii Usoltsev; Vera Sitnikova; Andrey Kajava; Mayya Uspenskaya. 2019. "Systematic FTIR Spectroscopy Study of the Secondary Structure Changes in Human Serum Albumin under Various Denaturation Conditions." Biomolecules 9, no. 8: 359.
T.N. Nosenko; V.E. Sitnikova; R.O. Olekhnovich; M.V. Uspenskaya. Application of infrared spectroscopy and multivariant analysis to study of serum for patients with epilepsy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics 2019, 19, 402 .
AMA StyleT.N. Nosenko, V.E. Sitnikova, R.O. Olekhnovich, M.V. Uspenskaya. Application of infrared spectroscopy and multivariant analysis to study of serum for patients with epilepsy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics. 2019; 19 (3):402.
Chicago/Turabian StyleT.N. Nosenko; V.E. Sitnikova; R.O. Olekhnovich; M.V. Uspenskaya. 2019. "Application of infrared spectroscopy and multivariant analysis to study of serum for patients with epilepsy." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 19, no. 3: 402.
T.N. Nosenko; V.E. Sitnikova; R.O. Olekhnovich; M.V. Uspenskaya. Detection of diabetes mellitus type II by infrared spectroscopy and multivariate analysis. Scientific and Technical Journal of Information Technologies, Mechanics and Optics 2019, 19, 202 -208.
AMA StyleT.N. Nosenko, V.E. Sitnikova, R.O. Olekhnovich, M.V. Uspenskaya. Detection of diabetes mellitus type II by infrared spectroscopy and multivariate analysis. Scientific and Technical Journal of Information Technologies, Mechanics and Optics. 2019; 19 (2):202-208.
Chicago/Turabian StyleT.N. Nosenko; V.E. Sitnikova; R.O. Olekhnovich; M.V. Uspenskaya. 2019. "Detection of diabetes mellitus type II by infrared spectroscopy and multivariate analysis." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 19, no. 2: 202-208.
Multilayer graphene has been obtained by ultrasonic splitting of graphite microparticles in a surface-active solvent that is a mixture of nonane and water and a surface-active surfactant, which provides dispersion of graphene in hydrophilic systems, has been selected. The chemical structure of the obtained materials has been investigated by IR Fourier spectroscopy. Possible mechanisms of the influence of inorganic surfactants (sodium liquid glass) on the graphene, the type of relations that arise between it and the graphene surface, and possible areas of its application have been discussed.
I. Yu. Denisyuk; K. Yu. Logushkova; M. I. Fokina; M. V. Uspenskaya. FT-IR-Spectra of Multilayered Graphene and Its Composition with Surface-Active Material. Optics and Spectroscopy 2018, 125, 918 -920.
AMA StyleI. Yu. Denisyuk, K. Yu. Logushkova, M. I. Fokina, M. V. Uspenskaya. FT-IR-Spectra of Multilayered Graphene and Its Composition with Surface-Active Material. Optics and Spectroscopy. 2018; 125 (6):918-920.
Chicago/Turabian StyleI. Yu. Denisyuk; K. Yu. Logushkova; M. I. Fokina; M. V. Uspenskaya. 2018. "FT-IR-Spectra of Multilayered Graphene and Its Composition with Surface-Active Material." Optics and Spectroscopy 125, no. 6: 918-920.
Detection of breast cancer has particular importance for the diagnosis of cancer diseases. This is the most common type of cancer among women. Breast cancer is a malignant tumor of the glandular tissue of the breast. It is proposed to use infrared spectroscopy of blood serum as a simple and quick way to detect breast cancer. The infrared spectra recorded on the attenuated total reflectance accessory, the blood serum of patients and healthy donors differ in the symmetry of the amide band I. The decomposition of the amide I band into its constituent components provides information on the conformational protein subunits present in the blood serum of patients.
Mariia Kotkova; Vera Sitnikova; Tatiana Nosenko; Tatiana Kotkova; Mayya Uspenskaya; Roman Olekhnovich. Spectroscopic Study of Blood Serum of Patients With Breast Cancer. 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES) 2018, 657 -660.
AMA StyleMariia Kotkova, Vera Sitnikova, Tatiana Nosenko, Tatiana Kotkova, Mayya Uspenskaya, Roman Olekhnovich. Spectroscopic Study of Blood Serum of Patients With Breast Cancer. 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES). 2018; ():657-660.
Chicago/Turabian StyleMariia Kotkova; Vera Sitnikova; Tatiana Nosenko; Tatiana Kotkova; Mayya Uspenskaya; Roman Olekhnovich. 2018. "Spectroscopic Study of Blood Serum of Patients With Breast Cancer." 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES) , no. : 657-660.
Diabetes is a group of metabolic disorders in which there are high blood sugar levels over a prolonged period. Type 2 DM begins with insulin resistance, a condition in which cells fail to respond to insulin properly. Diabetes type 2 accounts for about 90% of cases. Therefore, the development of new methods for the diagnosis of diabetes is relevant. In this article, the method of IR spectroscopy in combination with multidimensional analysis is proposed as a diagnostic method. Cluster analysis, partial least-squares (PLS) regression, principal component analysis (PCA) are performed to assess the correct diagnosis probability. Each of the three presented methods gives the best results when using the first derivative of the spectra in the whole range of the spectrum. Despite the fact that in this paper the PLS method differentiates samples with only 81% probability, the use of PLS methods is preferable, since in this case a training set of samples is used for which the desired characteristics are known.
Vera Sitnikova; Tatiana Nosenko; Roman Olekhnovich; Mayya Uspenskaya. Multivariate Analysis for Diagnostic of Type II Diabetes Mellitus. 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES) 2018, 642 -646.
AMA StyleVera Sitnikova, Tatiana Nosenko, Roman Olekhnovich, Mayya Uspenskaya. Multivariate Analysis for Diagnostic of Type II Diabetes Mellitus. 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES). 2018; ():642-646.
Chicago/Turabian StyleVera Sitnikova; Tatiana Nosenko; Roman Olekhnovich; Mayya Uspenskaya. 2018. "Multivariate Analysis for Diagnostic of Type II Diabetes Mellitus." 2018 IEEE-EMBS Conference on Biomedical Engineering and Sciences (IECBES) , no. : 642-646.
The paper considers the preparation of film materials based on the chitosan/polyhydroxybutyrate blend by the casting method. The combination of polysaccharide chitosan and polyester polyhydroxybutyrate gives the possibility to decrease the degradation rate and improve biomaterial mechanical characteristics. Acetic acid was used to dissolve biopolymer components. The paper presents compatibility study results for polymers in the blend composition. It was demonstrated that crystallization of polyhydroxybutyrate is suppressed by mixing with chitosan. In order to reduce the film coating solubility, we have studied the application possibility of ionic cross-linking with the help of calcium chloride. The effect of the calcium chloride content on the structure and morphology of the surface of the film compositions was studied by infrared spectroscopy and optical microscopy. Infrared spectroscopy showed that chemical cross-linking with calcium chloride occurs with the participation of carbonyl groups of polyhydroxybutyrate and hydroxyl groups of chitosan. It has been found that addition of more than 9% calcium chloride provides optically homogeneous surface of the film composition based on the chitosan/polyhydroxybutyrate blend. The obtained polymeric compositions of chitosan/polyhydroxybutyrate/CaCl2 have high perspectives for their further application in the development of medical materials.
Ekaterina N. Glazacheva; Daria O. Evtyukhova; M.V. Uspenskaya. Structure research of film compositions based on chitosan/polyhydroxybutyrate blend by infrared and X-ray fluorescence spectroscopy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics 2018, 117, 787 -793.
AMA StyleEkaterina N. Glazacheva, Daria O. Evtyukhova, M.V. Uspenskaya. Structure research of film compositions based on chitosan/polyhydroxybutyrate blend by infrared and X-ray fluorescence spectroscopy. Scientific and Technical Journal of Information Technologies, Mechanics and Optics. 2018; 117 (5):787-793.
Chicago/Turabian StyleEkaterina N. Glazacheva; Daria O. Evtyukhova; M.V. Uspenskaya. 2018. "Structure research of film compositions based on chitosan/polyhydroxybutyrate blend by infrared and X-ray fluorescence spectroscopy." Scientific and Technical Journal of Information Technologies, Mechanics and Optics 117, no. 5: 787-793.
Polymeric polyelectrolyte hydrogel composites based on a copolymer of acrylic acid and acrylamide are synthesized. The composites are filled with bentonite (1 to 5 wt %). The kinetics of the collapse of hydrogel composites in aqueous solutions of salts of alkali and alkaline-earth metals at a constant temperature of 25°C are studied. Gravimetry is used to study the kinetics of the swelling and collapse of a gel of the cross-linked copolymer of acrylic acid and acrylamide, and its composites with bentonite in aqueous solutions of salts of mono- and divalent metals. It is found that the presence of bentonite prevents the collapse of composites based on acrylic hydrogels in aqueous solutions of electrolytes, due to the steric and electrostatic interactions between filler particles. By comparing these two kinetic models, it is shown that Peleg’s kinetic model best describes the experimental data on the collapse of the polymer hydrogel composite in aqueous solutions of metal salts. It is established that the kinetic constant of hydrogel collapse does not depend on the radius of metal ions at equal concentrations of the studied salts in a solution.
E. O. Samuilova; V. E. Sitnikova; Roman Olekhnovich; M. V. Uspenskaya. Studying the Collapse of Bentonite-Containing Composites Based on Acrylic Copolymers. Russian Journal of Physical Chemistry A 2018, 92, 1602 -1608.
AMA StyleE. O. Samuilova, V. E. Sitnikova, Roman Olekhnovich, M. V. Uspenskaya. Studying the Collapse of Bentonite-Containing Composites Based on Acrylic Copolymers. Russian Journal of Physical Chemistry A. 2018; 92 (8):1602-1608.
Chicago/Turabian StyleE. O. Samuilova; V. E. Sitnikova; Roman Olekhnovich; M. V. Uspenskaya. 2018. "Studying the Collapse of Bentonite-Containing Composites Based on Acrylic Copolymers." Russian Journal of Physical Chemistry A 92, no. 8: 1602-1608.