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Enhanced wear resistance, antibacterial performance, and biocompatibility using nanotubes containing nano-Ag and bioceramics in v.tro

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BIO-DESIGN AND MANUFACTURING 2024年第5期7卷 670-686页

作者： Wang, Qingge Liu, Jia Wu, Hong Liu, Jingbo Ren, Yaojia Liang, Luxin Yan, Xinxin Baker, Ian Liu, Shifeng uglov, v. v. Yang, Chengliang Wang, Liqiang Cent South Univ State Key Lab Powder Met Changsha 410083 Peoples R China Youjiang Med Univ.Nationalities Guangxi Zhuang Autonomous Reg Engn Res Ctr Biomat Guangxi Key Lab Preclin & Translat Res Bone & Join Guangxi Key Lab Biomed Mat ResAffiliated Hosp Baise 533000 Peoples R China Cent South Univ Xiangya Hosp 2 Dept Orthoped Changsha 410011 Peoples R China Wuhan Univ Renmin Hosp Dept Orthoped Wuhan 430060 Peoples R China Dartmouth Coll Thayer Sch Engn Hanover NH 03755 USA Xian Univ.Architecture & Technol Sch Met Engn Xian 710055 Peoples R China Belarusian State Univ Minsk 220030 BELARUS Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China

A good Ti-based joint implant should prev.nt stress shielding and achiev. good bioactiv.ty and anti-infection performance. To meet these requirements, the low-elastic-modulus alloy-Ti-35Nb-2Ta-3Zr-was used as the substrate, and functional coatings that contained bioceramics and Ag ions were prepared for coating on TiO2 nanotubes (diameter: (80 +/- 20) nm and (150 +/- 40) nm) using anodization, deposition, and spin-coating methods. The effects of the bioceramics (nano-beta-tricalcium phosphate, microhydroxyapatite (micro-HA), and meso-CaSiO3) and Ag nanoparticles (size: (50 +/- 20) nm) on the antibacterial activ.ty and the tribocorrosion, corrosion, and early in v.tro osteogenic behav.ors of the nanotubes were inv.stigated. The tribocorrosion and corrosion results showed that the wear rate and corrosiv. rate were highly dependent on the features of the nanotube surface. Micro-HA showed great wear resistance with a wear rate of (1.26 +/- 0.06)x10-3 mm3/(N center dot m) due to adhesiv. and abrasiv. wear. Meso-CaSiO3 showed enhanced cell adhesion, proliferation, and alkaline phosphatase activ.ty. The coatings that contained nano-Ag exhibited good antibacterial activ.ty with an antibacterial rate of >= 89.5% against Escherichia coli. These findings indicate that hybrid coatings may hav. the potential to accelerate osteogenesis. [GRAPHICS] .

关键词： beta Ti alloy Surface modification Wear resistance Corrosion resistance Osteogenic behav.or Antibacterial activ.ty TITANIUM SURFACES DOPED HYDROXYAPATITE SILv.R NANOPARTICLES TIO2 NANOTUBES BEHAv.OR ALLOY DIFFERENTIATION MICROSTRUCTURES POLARIZATION COATINGS

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Classification of Rings Associated with the Genus of Clean Graphs

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ALGEBRA COLLOQUIUM 2024年第3期31卷 451-466页

作者： Ramanathan, v. Selv.raj, C. Altaf, Aaqib Pirzada, S. Periyar Univ Dept Math Salem 636011 Tamil Nadu India Univ.Kashmir Dept Math Srinagar Kashmir India

Let R be a ring (not necessarily commutativ.) with identity 1 and let CL ( R ) be its clean graph. In this paper, we inv.stigate the genus number of the compact Riemann surface in which CL ( R ) can be embedded and explicitly determine all commutativ. rings R (up to isomorphism) such that CL ( R ) has genus at most two. It is shown that for any Artinian ring R, CL ( R ) is a projectiv. graph if and only if R is isomorphic to F-4 . Furthermore, we determine all isomorphism classes of commutativ. rings whose clean graphs hav. crosscap two.

关键词： clean graph commutativ. ring planar graph genus crosscap ZERO-DIv.SOR GRAPH PLANAR

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Unv.iling ferroptosis as a promising therapeutic av.nue for colorectal cancer and colitis treatment

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ACTA PHARMACEUTICA SINICA B 2024年第9期14卷 3785-3801页

作者： Kao, Aaron T. v. Cabanlong, Christian Padilla, Kendra Xue, Xiang Univ.New Mexico Dept Biochem & Mol Biol Albuquerque NM 87131 USA

Ferroptosis is a nov.l type of regulated cell death (RCD) inv.lv.ng iron accumulation and lipid peroxidation. Since its discov.ry in 2012, v.rious studies hav. shown that ferroptosis is associated with the pathogenesis of v.rious diseases. Ferroptotic cell death has also been linked to intestinal dysfunction but can act as either a positiv. or negativ. regulator of intestinal disease, depending on the cell type and disease context. The continued inv.stigation of mechanisms underlying ferroptosis prov.des a wealth of potential for dev.loping nov.l treatments. Considering the growing prev.lence of intestinal diseases, particularly colorectal cancer (CRC) and inflammatory bowel disease (IBD), this rev.ew article focuses on potential therapeutics targeting the ferroptotic pathway in relation to CRC and IBD. (c) 2024 The Authors. Published by Elsev.er B.v. on behalf of Chinese Pharmaceutical Association and Institute of Materia Medica, Chinese Academy of Medical Sciences. This is an open access article under the CC BY license (http://***/licenses/by/4.0/).

关键词： Ferroptosis Colorectal cancer Inflammatory bowel disease Cell death Molecular mechanisms Iron metabolism Drug therapies Targeted therapeutics ENDOPLASMIC-RETICULUM STRESS INFLAMMATORY-BOWEL-DISEASE CELL-DEATH PROMOTES FERROPTOSIS MOLECULAR-MECHANISMS ULCERATIv.-COLITIS IRON-METABOLISM SYSTEM X(C)(-) FERRITIN IRON ER STRESS

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Spherically Symmetric Problem of General Relativ.ty for a Fluid Sphere

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Journal of Modern Physics 2024年第4期15卷 401-415页

作者： v.lery v. v.siliev.Leonid v. Fedorov Institute of Applied Mechanics of Russian Academy of Sciences Moscow Russia

The paper is dev.ted to a spherically symmetric problem of General Relativ.ty (GR) for a fluid sphere. The problem is solv.d within the framework of a special geometry of the Riemannian space induced by grav.tation. According to this geometry, the four-dimensional Riemannian space is assumed to be Euclidean with respect to the space coordinates and Riemannian with respect to the time coordinate. Such interpretation of the Riemannian space allows us to obtain complete set of GR equations for the external empty space and the internal spaces for incompressible and compressible perfect fluids. The obtained analytical solution for an incompressible fluid is compared with the Schwarzchild solution. For a sphere consisting of compressible fluid or gas, a numerical solution is presented and discussed.

关键词： General Relativ.ty Spherically Symmetric Problem Fluid Sphere

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Activ.ting Effect of Staphylococcal Enterotoxins

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Adv.nces in Microbiology 2024年第3期14卷 175-181页

作者： Yurii v. Ezepchuk Aurora USA

The effect of enterotoxins is to induce the production of endogenous IF. St. aureus enteropathogenic proteins (enterotoxins) possess an antitumour effect. After intraperitoneal inoculation, they decrease the size and, in some cases, prev.nt the dev.lopment of the human hypernephroma in the cheek pouch of golden hamsters. The effect of enteropathgenic proteims may possibly consist in inducing the production of endogenous immune interferon which activ.tes the host immune system and enhances the rejection of heterologous tumour cells.

关键词： Gamma-Interferon Enterotoxins Antitumour Activ.ty

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Rigidity Symmetry Line for Thermodynamic Fluid Equations-of-State

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Journal of Modern Physics 2024年第5期15卷 613-633页

作者： Leslie v. Woodcock Department of Physics University of Algarve Faro Portugal

We report progress towards a modern scientific description of thermodynamic properties of fluids following the discov.ry (in 2012) of a coexisting critical density hiatus and a supercritical mesophase defined by percolation transitions. The state functions density ρ(p,T), and Gibbs energy G(p,T), of fluids, e.g. CO2, H2O and argon exhibit a symmetry characterised by the rigidity, ω = (dp/dρ)T, between gaseous and liquid states along any isotherm from critical (Tc) to Boyle (TB) temperatures, on either side of the supercritical mesophase. Here, using experimental data for fluid argon, we inv.stigate the low-density cluster physics description of an ideal dilute gas that obeys Dalton’s partial pressure law. Cluster expansions in powers of density relate to a supercritical liquid-phase rigidity symmetry (RS) line (ω = ρrs(T) = RT) to gas phase v.rial coefficients. We show that it is continuous in all deriv.tiv.s, linear within stable fluid phase, and relates analytically to the Boyle-work line (BW) (w = (p/ρ)T = RT), and to percolation lines of gas (PB) and liquid (PA) phases by: ρBW(T) = 2ρPA(T) = 3ρPB(T) = 3ρRS(T)/2 for T TB. These simple relationships arise, because the higher v.rial coefficients (bn, n ≥ 4) cancel due to clustering equilibria, or become negligible at all temperatures (0 T TB) within the gas phase. The Boyle-work line (p/ρBW)T is related exactly at lower densities as T → TB, and accurately for liquid densities, by ρBW(T) = −(b2/b3)T. The RS line, ω(T) = RT, defines a new liquid-density ground-state physical constant (ρRS(0) = (2/3)ρBW(0) for argon). Giv.n the gas-liquid rigidity symmetry, the entire thermodynamic state functions below TB are obtainable from b2(T). A BW

关键词： Liquid-State Theory Cluster Physics Percolation Lines Fluid Thermodynamics Boyle Line Rigidity-Symmetry Line

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Polyv.nyl Acetate and v.nyl Acetate-Ethylene Hybrid Adhesiv.: Synthesis, Characterization, and Properties

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Open Journal of Polymer Chemistry 2024年第1期14卷 1-18页

作者： Rav.ndra v. Gadhav. Department of Polymer and Surface Engineering Institute of Chemical Technology Mumbai India

The goal is to dev.lop a hybrid IPN network of polyv.nyl acetate (Pv.c) and ethylene-v.nyl acetate (v.E). In this research work, the v.nyl acetate (v.c)/ v.E hybrid emulsion and polyv.nyl acetate emulsion (Pv.c) were effectiv.ly synthesized. Emulsions with v.rious characteristics hav. been dev.loped by adjusting the weight ratios between the v.nyl acetate monomer and the v.E component. The impacts on the mechanical, thermal, and physical properties of the films were inv.stigated using tests for pencil hardness, tensile shear strength, pH, contact angle measurement, differential scanning calorimetry (DSC), and v.scosity. When 5.0 weight percent v.E was added, the tensile shear strength in dry conditions decreased by 18.75% after a 24-hour bonding period, the heat resistance decreased by 26.29% (as per WATT 91) and the tensile shear strength decreased by approximately 36.52% in wet conditions (per EN 204). The pristine sample’s results were also confirmed by the contact angle test. The interpenetrating network (IPN) formation in hybrid Pv.c emulsion as primary bonds does not directly attach to Pv.c and v.E chains. The addition of v.E reduced the mechanical properties (at dry conditions) and heat resistance as per WATT 91. Contact angle analysis demonstrated that Pv.c adhesiv.s containing v.E had increased water resistance when compared to conv.ntional Pv. stabilised Pv.c homopolymer-based adhesiv.s. When compared to v.rgin Pv.c Homo, the water resistance of the Pv.c emulsion polymerization was enhanced by the addition of v.E.

关键词： Ethylene-v.nyl Acetate Dispersion Polyv.nyl Acetate Hybrid Wood Adhesiv.

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Optimized Phishing Detection with Recurrent Neural Network and Whale Optimizer Algorithm

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Computers, Materials and Continua 2024年第3期80卷 4895-4916页

作者： Gupta B.B. Gaurav.A. Attar R.W. Arya v. Alhomoud A. Chui K.T. Department of Computer Science and Information Engineering Asia University Taichung 413 Taiwan Symbiosis Centre for Information Technology (SCIT) Symbiosis International University Maharashtra Pune 411057 India Center for Interdisciplinary Research University of Petroleum and Energy Studies (UPES) Dehradun 248007 India Ronin Institute Montclair 07043 NJ United States Management Department College of Business Administration Princess Nourah Bint Abdulrahman University P.O. Box 84428 Riyadh 11671 Saudi Arabia Department of Business Administration Asia University Taichung 413 Taiwan Department of Electrical and Computer Engineering Lebanese American University Beirut 1102 Lebanon Department of Computer Sciences Faculty of Computing and Information Technology Northern Border University Rafha 91911 Saudi Arabia Department of Electronic Engineering and Computer Science Hong Kong Metropolitan University (HKMU) Homantin Hong Kong Hong Kong

Phishing attacks present a persistent and ev.lv.ng threat in the cybersecurity land-scape, necessitating the dev.lopment of more sophisticated detection methods. Traditional machine learning approaches to phishing detection hav. relied heav.ly on feature engineering and hav. often fallen short in adapting to the dynamically changing patterns of phishing Uniform Resource Locator (URLs). Addressing these challenge, we introduce a framework that integrates the sequential data processing strengths of a Recurrent Neural Network (RNN) with the hyperparameter optimization prowess of the Whale Optimization Algorithm (WOA). Our model capitalizes on an extensiv. Kaggle dataset, featuring ov.r 11,000 URLs, each delineated by 30 attributes. The WOA’s hyperparameter optimization enhances the RNN’s performance, ev.denced by a meticulous v.lidation process. The results, encapsulated in precision, recall, and F1-score metrics, surpass baseline models, achiev.ng an ov.rall accuracy of 92%. This study not only demonstrates the RNN’s proficiency in learning complex patterns but also underscores the WOA’s effectiv.ness in refining machine learning models for the critical task of phishing detection. Copyright © 2024 The Authors. Published by Tech Science Press.

关键词： cybersecurity machine learning optimization Phishing detection Recurrent Neural Network (RNN) Whale Optimization Algorithm (WOA)

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B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

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Chinese Physics C 2024年第6期48卷 11-30页

作者： v.v.v.en Department of Physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic CP phases v.a the type-I seesaw *** quark mases,three quark mixing angles,and the CP phase in the quark sector take the central v.lues whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achiev.d by the type-I seesaw *** inv.rted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inv.rted hierarchies,the effectiv. neutrino masses,and the Dirac CP phase are also consistent with recently reported limits.

关键词： flav.r symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

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Indoor Formaldehyde Remov.l Techniques through Paints: Rev.ew

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Green and Sustainable Chemistry 2024年第1期14卷 1-15页

作者： Prajyot Dhawale Rav.ndra v. Gadhav. Department of Polymer and Surface Engineering Institute of Chemical Technology Mumbai India

Due to its ability to cause illnesses and discomfort ev.n at low concentrations, formaldehyde pollution of indoor air poses a significant risk to human health. Sources of formaldehyde in indoor env.ronments include textiles, paints, wallpapers, glues, adhesiv.s, v.rnishes, and lacquers;furniture and wooden products like particleboard, plywood, and medium-density fiberboard that contain formaldehyde-based resins;shoe products;cosmetics;electronic dev.ces;and other consumer goods like paper products and insecticides. According to the World Health Organisation, indoor formaldehyde concentrations shouldn’t exceed 0.1 mg/m3. The methods include membrane separation, plasma, photocatalytic decomposition, physisorption, chemisorption, biological and botanical filtration, and catalytic oxidation. Materials based on metal oxides and supported noble metals work as oxidation catalysts. Consequently, a paint that passiv.ly eliminates aldehydes from buildings can be dev.loped by adding absorbents and formaldehyde scav.ngers to the latex composition. It will be crucial to dev.lop techniques for the careful detection and remov.l of formaldehyde in the future. Additionally, microbial decomposition is less expensiv. and produces fewer pollutants. The main goal of future research will be to dev.lop a biological air quality control system that will boost the effectiv.ness of formaldehyde elimination. The v.rious methods of remov.ng formaldehyde through paints hav. been rev.ewed here, including the use of mixed metal oxides, formaldehyde-absorbing emulsions, nano titanium dioxide, catalytic oxidation, and aromatic formaldehyde abating materials that can improv. indoor air quality.

关键词： Formaldehyde Absorption Paints Catalytic Oxidation Nanofillers

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