Article
Biochemistry & Molecular Biology
Katarzyna Lewandowska, Marta Szulc
Summary: The study investigated the viscosity behavior and physical properties of blends containing hyaluronic acid (HA) and poly(N-vinylpyrrolidone) (PVP) using viscometric technique, steady shear tests, tensile tests, and infrared spectroscopy. The results showed that HA/PVP blends were miscible, with a shear-thinning flow behavior and increased pseudoplasticity with higher HA contents. The mechanical properties of blends with HA weight fractions of 0.5 were superior, showing higher tensile strength and elongation at the break compared to those with higher or lower HA contents. Additionally, infrared analysis confirmed interactions between HA and PVP, generating films with elasticity and improved properties compared to homopolymer films.
Article
Thermodynamics
Kazuhiko Ishikiriyama, Keisuke Kondo, Yuji Miyazaki, Yuto Sasada, Keisuke Sawada, Ryo Endo, Naoki Man, Motohiro Nakano, Yasuhiro Nakazawa
Summary: In this study, the heat capacity of dried PVP was measured to determine the recommended values for further analysis of the water state in biocompatible PVP. The heat capacity of the solid state was analyzed using group vibrational spectrum and skeletal vibrations. The heat capacity of the liquid was fitted to a linear function, and the change in heat capacity of amorphous PVP at the glass transition temperature was determined.
THERMOCHIMICA ACTA
(2023)
Article
Biochemistry & Molecular Biology
Katarzyna Lewandowska, Marta Szulc
Summary: The study characterized mixtures based on carboxymethyl chitosan (CMCh) and poly(N-vinylpyrrolidone) (PVP) using various analytical techniques. The results showed that CMCh/PVP mixtures had higher apparent viscosity and good miscibility in aqueous solution.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Trevor Gilbert, Matthew A. Campea, Nahieli Preciado Rivera, Michael Majcher, Richard Alsop, Mouhanad Babi, Thomas Kalab, Jose Moran-Mirabal, Maikel Rheinstadter, Todd Hoare
Summary: In this study, injectable PNIPAM/PVP interpenetrating polymer networks were fabricated and characterized. The results show that the internal structure of the injectable IPNs can be controlled by adjusting the PVP molecular weight and degree of thiolation. The PNIPAM gelation drives the formation of domains, with PNIPAM mainly located in the PVP-rich domains and PVP entrapped in the PNIPAM-rich domain. Additionally, the structural reconfiguration of the IPNs can be achieved by heating above the volume phase transition temperature of the PNIPAM phase, which is influenced by the molecular weight and thiolation degree of the PVP precursor polymers.
Article
Polymer Science
Aniket Raje, Kristian Buhr, Joachim Koll, Jelena Lillepaerg, Volker Abetz, Ulrich A. Handge
Summary: This study successfully prepared open porous polymer foams using physical blowing agents, achieving uniform foams with small pore sizes by adjusting the concentration of PVP. Flat sheet membranes with high porosity were also manufactured through post-treatment, demonstrating their applicability as ultrafiltration membranes.
Article
Biotechnology & Applied Microbiology
Youyi Yu, Behafarid Ghalandari, Guangxia Shen, Liping Wang, Xiao Liu, Aiting Wang, Sijie Li, Haiyang Xie, Xianting Ding
Summary: Phosphomolybdate-based nanoparticles are commonly used in nanomedicine, but protein corona formation upon contact with biofluids can lead to rapid clearance by macrophages. By capping with zwitterionic polymer PVP, the binding sites of proteins on PMo12-based NPs can be effectively reduced, indicating a potential strategy to improve anti-biofouling properties for nanodrug design.
JOURNAL OF NANOBIOTECHNOLOGY
(2021)
Article
Energy & Fuels
Xiaobo Wang, Xinqi Zhang, Minmin Cao, Xuefeng Wang, Qianwen Gao, Cunbao Deng, Xin Huang
Summary: A set of Pd-M-Al composite oxides with an ordered mesoporous structure were successfully prepared, and it was found that the addition of La2O3 can significantly improve the catalytic combustion performance of 1%Pd/Al2O3 catalyst.
Article
Energy & Fuels
Xiaobo Wang, Xinqi Zhang, Minmin Cao, Xuefeng Wang, Qanwen Gao, Cunbao Deng, Xin Huang
Summary: The influence of Pd-M-Al composite oxides on the catalytic combustion of methane was investigated, and it was found that the addition of La2O3 can greatly enhance the performance of the catalyst.
Article
Materials Science, Ceramics
Wen-Chiao Huang, Pei-Wen Huang, Chi-Yuen Huang, Fu-Su Yen, Cheng-Liang Huang
Summary: Modified theta-Al2O3@ polyethylene glycol (PEG) technology was used to prepare alpha-Al2O3 green compacts composed of <100-nm alpha-Al2O3 crystallites using theta-Al2O3 as the starting material. The preparation process consisted of two steps, involving the removal of PEG to separate alumina crystallites in theta-Al2O3 compacts and the transformation of theta-Al2O3 into alpha-Al2O3. The resulting compact exhibited a phase purity of >85% alpha-Al2O3, with crystallite sizes ranging from 50 to 100 nm, and a compact density exceeding 60% of the theoretical value.
CERAMICS INTERNATIONAL
(2022)
Article
Polymer Science
Danelya N. Makhayeva, Sergey K. Filippov, Sanzhar S. Yestemes, Galiya S. Irmukhametova, Vitaliy V. Khutoryanskiy
Summary: The study found that poly(2-ethyl-2-oxazoline) has a greater ability to bind iodine compared to poly(N-vinylpyrrolidone), but the iodophors formed by these two polymers exhibit similar antimicrobial properties.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hao Li, Quanwei Ma, Yizhi Yuan, Rui Wang, Ziyang Wang, Qianyu Zhang, Longhai Zhang, Jian Zhu, Shilin Zhang, Jianfeng Mao, Hongbao Li, Svetlana Eliseeva, Veniamin Kondratiev, Yun Zhang, Chaofeng Zhang, Yuping Wu
Summary: In this study, N, S co-doped carbon hollow nanospheres (NS-HCSs) were synthesized and used as an anode material for potassium ion batteries. The NS-HCSs exhibited high reversible capacity and excellent long-term cycling performance. The K-storage mechanism and dynamic evolution processes of the NS-HCSs were revealed through combined experiment and theoretical computation.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Durairaj Gopalakrishnan, S. Saravanan, Ronald Merckx, Arumugam Madan Kumar, Themmila Khamrang, Marappan Velusamy, K. Vasanth, S. Sunitha, Richard Hoogenboom, Samarendra Maji, Mani Ganeshpandian
Summary: Gold nanoparticles coated with Ru(arene)-functionalized PNVP-Py exhibited higher anti-proliferative activity against colorectal adenocarcinoma cells compared to individual organometallic ruthenium(ii) complexes. The development of a nanoconjugate combining a ruthenium organometallic complex and gold nanoparticles through a modification process has shown potential for cancer treatment by enhancing cellular permeability and inducing apoptotic cell death.
DALTON TRANSACTIONS
(2021)
Article
Polymer Science
Lei Li, Wenming Ge, Bingjie Zhao, Muhammad Adeel, Honggang Mei, Sixun Zheng
Summary: A novel five-membered cyclic carbonate compound was synthesized and used as the precursor for preparing PHU thermosets with improved thermomechanical properties and hydrophobicity. The nanostructured PHU thermosets showed enhanced T-g and mechanical properties compared to plain PHU thermosets, with significantly improved surface hydrophobicity. Introduction of PTFEA-b-PVPy maintained excellent shape memory and reprocessability in the nanostructured PHU thermosets.
Article
Polymer Science
Avnish Kumar Mishra, Junsub Lim, Jaeyong Lee, Soyeong Park, Yeseong Seo, Heedong Hwang, Jin Kon Kim
Summary: pH-sensitive and stable PNVP-b-P4VP micelles with low critical micelle concentration were successfully synthesized and showed excellent drug release capabilities under different pH conditions. The release of DOX could be effectively regulated by controlling pH, demonstrating high drug loading efficiency and good biocompatibility.
Article
Chemistry, Physical
Svetlana Kurmaz, Natalia Fadeeva, Anna Gorshkova, Sergey A. Kurochkin, Eugenia Knerelman, Galina Davydova, Vladimir Torbov, Nadezhda N. Dremova, Dmitry Konev, Vladimir A. Kurmaz, Vladislav M. Ignatiev, Nina S. Emelyanova
Summary: Mesoporous polymer networks were prepared by cross-linking radical copolymerization, showing high potential as precursors for molecularly imprinted polymers to recognize fluorescent dyes as nanomarkers. Experimental and modeling data demonstrated the strong hydrogen bonds within these systems, suggesting promising applications in biomedical practice.
Article
Chemistry, Physical
Michail A. Korchagin, Dina Dudina, Alexander Gavrilov, Boris B. Bokhonov, Natalia Bulina, Alexey Panin, Nikolay Z. Lyakhov
Article
Parasitology
Damira Avgustinovich, Maria Lvova, Galina Vishnivetskaya, Mikhail Tsyganov, Irina Orlovskaya, Lyudmila Toporkova, Elena Goiman, Aleksander Dushkin, Nikolay Lyakhov, Viatcheslav Mordvinov
Summary: Three-time administration of PZQ-Na(2)GA significantly reduced the number of liver helminths in the Opisthorchis felineus-infected hamster model, improved physiological status, and increased sensitivity to PZQ.
ACTA PARASITOLOGICA
(2021)
Article
Materials Science, Ceramics
Mikhail V. Khvostov, Marina S. Borisova, Natalia V. Bulina, Svetlana V. Makarova, Natalya B. Dumchenko, Tatjana G. Tolstikova, Nikolay Z. Lyakhov
Summary: In this study, mechanochemical synthesis was used to produce hydroxyapatite with double and triple substitutions. The triple substitution involving zinc ions showed the highest ability to promote cell proliferation in vitro and integrate into rat skull bones in vivo after four months, indicating promising potential for bone tissue engineering applications.
CERAMICS INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
T. F. Grigoreva, D. Dudina, S. A. Petrova, S. A. Kovaleva, I. S. Batraev, S. V. Vosmerikov, E. T. Devyatkina, N. Z. Lyakhov
Summary: X-ray analysis and scanning electron microscopy were utilized to study the microstructure and properties of mechanochemically synthesized Al/Cu9Al4 composites and their sintered materials. The research revealed that a composite structure with uniform distribution of particles can be formed even after a short period of mechanical activation. Additionally, the hardness of sintered composites is approximately twice that of pure aluminum without reinforcing additives.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Metallurgy & Metallurgical Engineering
T. F. Grigoreva, S. A. Petrova, S. A. Kovaleva, D. Dudina, I. S. Batraev, T. Yu Kiseleva, S. Zholudev, S. V. Vosmerikov, E. T. Devyatkina, T. A. Udalova, S. N. Polyakov, N. Z. Lyakhov
Summary: The mechanochemically synthesized Cu-20 wt % Al alloys and solid solution of aluminum in copper show unique microstructural characteristics, with small crystallites and low microstrains. The Cu(Al) solid solution produced by spark plasma sintering exhibits low residual porosity and high Vickers hardness.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Metallurgy & Metallurgical Engineering
T. F. Grigoreva, T. Yu. Kiseleva, S. A. Petrova, T. L. Talako, S. V. Vosmerikov, T. A. Udalova, E. T. Devyatkina, A. A. Novakova, N. Z. Lyakhov
Summary: The products of the mechanochemical reduction of iron oxide with aluminum were studied using X-ray diffraction analysis, infrared, and Mossbauer spectroscopy. The results showed that the products contain iron, alpha-Al2O3, and a large amount of spinel (hercynite), and the reduction of iron oxide proceeds faster with a twofold increase in the aluminum content. Excess aluminum reacts with the reduced iron to form intermetallic FexAly phases, mainly FeAl strengthened by alpha-Al2O3 particles.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Chemistry, Physical
Natalia V. Bulina, Sergey G. Baev, Svetlana V. Makarova, Alexander M. Vorobyev, Alexander I. Titkov, Victor P. Bessmeltsev, Nikolay Z. Lyakhov
Summary: This study focused on the laser irradiation treatment of mechanochemically synthesized hydroxyapatite with a wavelength of 10.6 μm, demonstrating that selective laser melting technology can be used to produce biodegradable implants with acceptable properties.
Article
Materials Science, Multidisciplinary
O. A. Logutenko, A. I. Titkov, A. M. Vorobyov, N. Z. Lyakhov
Summary: In this study, monodispersed micron-sized spherical copper and cuprous oxide particles were prepared by reducing copper 2-[2-(2-methoxyethoxy)ethoxy]acetate with benzyl alcohol. The method developed is simple, low cost, and highly scalable. The as-synthesized copper powders may have applications as metallic fillers in ink and paste formulations for 2D and 3D micro-printing to fabricate functional components and devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Metallurgy & Metallurgical Engineering
T. F. Grigoreva, T. Yu Kiseleva, S. A. Kovaleva, S. Zholudev, S. V. Vosmerikov, E. T. Devyatkina, V. D. Grigorev, N. Z. Lyakhov
Summary: Mechanochemical synthesis and subsequent sintering of the Fe-20 wt % Ga system result in the formation of Fe-based composites with varying phase compositions and microstructures. The materials exhibit good ferromagnetic properties, with different coercive forces, saturation magnetization, and residual magnetization depending on the activation and sintering conditions.
RUSSIAN METALLURGY
(2021)
Article
Thermodynamics
M. A. Korchagin, A. Gavrilov, I. Grishina, D. Dudina, A. Ukhina, B. B. Bokhonov, N. Z. Lyakhov
Summary: Ti3AlC2 and Ti3SiC2 single-phase MAX phases were successfully synthesized by preliminary mechanical activation and subsequent self-propagating high temperature synthesis.
COMBUSTION EXPLOSION AND SHOCK WAVES
(2022)
Article
Materials Science, Multidisciplinary
Dina Dudina, Tatyana F. Grigoreva, Vyacheslav Kvashnin, Evgeniya T. Devyatkina, Sergey V. Vosmerikov, Arina Ukhina, Aleksey N. Novoselov, Mikhail A. Legan, Maksim A. Esikov, Yaroslav L. Lukyanov, Alexander G. Anisimov, Svetlana A. Kovaleva, Nikolay Z. Lyakhov
Summary: A fabrication route of Cu-10 wt% Al bronze has been proposed using high-energy mechanical milling and spark plasma sintering (SPS). The sintered alloy at 800 degrees C exhibits favorable properties in terms of hardness, strength, deformation capability, and electrical conductivity.
Article
Multidisciplinary Sciences
Viktor I. Zhornik, Tatiana F. Grigoreva, Svetlana A. Kovaliova, Tatyana Yu. Kiseleva, Evgeniya T. Devyatkina, Sergey V. Vosmerikov, Ilya S. Veremey, Nikolay Z. Lyakhov
Summary: This study investigated the mechanochemical reduction of oxides of iron, nickel, and copper with aluminum, as well as the formation of metals modified with aluminum oxide. The conditions for the formation of aluminum monoaluminides and high aluminum content aluminides were determined. The preferred method for modifying metals with alumina is through mechanochemical reduction using a solid solution of aluminum.
DOKLADY NATSIONALNOI AKADEMII NAUK BELARUSI
(2022)
Article
Chemistry, Multidisciplinary
N. Bulina, A. Titkov, D. D. Isaev, S. Makarova, S. G. Baev, A. M. Vorobyev, V. P. Bessmeltsev, N. Z. Lyakhov
Summary: The behavior of hydroxyapatite containing zinc and silicate ions under selective laser melting at 10.6 μm radiation was studied for the first time. It was found that heating the mechanochemically synthesized material with a substitution degree of x = 0.2 through scanning laser spot enables recrystallization with retention of substituent ions in the apatite structure. Heating under different conditions leads to the formation of different impurity phases, with hydroxyapatites with higher degrees of substitution (x = 1, 2) being unstable under both heating regimes.
RUSSIAN CHEMICAL BULLETIN
(2021)
Article
Metallurgy & Metallurgical Engineering
T. F. Grigoreva, S. A. Petrova, S. A. Kovaleva, T. Yu Kiseleva, S. Zholudev, S. V. Vosmerikov, T. A. Udalova, E. T. Devyatkina, S. N. Polyakov, N. Z. Lyakhov
Summary: X-ray diffraction analysis was used to study the mechanochemical formation of a solid solution in the Cu-10 wt % Al system. The formation of the solid solution was found to occur via the formation of CuAl2 and Cu9Al4 intermetallic compounds, with a maximum Al concentration of 7.4 wt % in the solid solution. The two-phase product formed under the conditions of mechanical activation in a high-energy planetary ball mill consisted of 90 wt % Cu(Al) + 10 wt % Cu9Al4.
PHYSICS OF METALS AND METALLOGRAPHY
(2021)
Article
Chemistry, Physical
T. Yu. Kiseleva, S. A. Kovaleva, T. F. Grigoreva, A. B. Tsepelev, S. I. Zholudev, S. V. Vosmerikov, E. T. Devyatkina, I. P. Ivanenko, O. V. Kostenko, E. V. Yakuta, A. S. Ilyushin, N. Z. Lyakhov
Summary: Differential scanning calorimetry was used to study the effects of electron irradiation on the structural state of composite materials made from precursors of ultrahigh molecular weight polyethylene and boron carbide B4C. The study shows that the composite material is resistant to electron irradiation up to a fluence of 8 x 10(14) cm(-2).
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
