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Deepa K, Venkatesha TV. Comparative Anticorrosion Performance of Electrochemically Produced Zn–NiO and Zn–NiO–ZrO2 Composite Coatings on Mild Steel. Surf Engin Appl Electrochem 2019. [DOI: 10.3103/s1068375519030050] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Vinutha MR, Venkatesha TV, Nagaraja C. Anticorrosive ability of electrochemically synthesized 2,2′-disulfanediyldianiline for mild steel corrosion: electrochemical and thermodynamic studies. Int J Ind Chem 2018. [DOI: 10.1007/s40090-018-0149-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ranganatha S, Venkatesha TV. Fabrication and anticorrosion performance of Ni–P–BN nanocomposite coatings on mild steel. Surf Engin Appl Electrochem 2017. [DOI: 10.3103/s106837551705009x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Mohan Reddy R, Praveen BM, Praveen Kumar CM, Venkatesha TV. Ni–Si3N4: Electrodeposition, properties and corrosion behavior. Surf Engin Appl Electrochem 2017. [DOI: 10.3103/s1068375517030127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Prasanna BM, Praveen BM, Hebbar N, Venkatesha TV. Anticorrosion potential of hydralazine for corrosion of mild steel in 1m hydrochloric acid solution. J Fundam and Appl Sci 2015. [DOI: 10.4314/jfas.v7i2.6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Hebbar N, Praveen BM, Prasanna BM, Venkatesha TV. Corrosion inhibition behavior of Ketosulfone for Zinc in acidic medium. J Fundam and Appl Sci 2015. [DOI: 10.4314/jfas.v7i2.9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Pavithra MK, Venkatesha TV, Punith Kumar MK, Anantha NS. Electrochemical, gravimetric and quantum chemical analysis of mild steel corrosion inhibition by colchicine in 1 M HCl medium. Res Chem Intermed 2015. [DOI: 10.1007/s11164-015-2158-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shalini S, Girija CR, Jotani MM, Sathish CD, Venkatesha TV. Crystal structure of 2-{(E)-[(2-hy-droxy-phen-yl)iminium-yl]meth-yl}-4-methyl-phenolate. Acta Crystallogr E Crystallogr Commun 2015; 71:o288. [PMID: 25995908 PMCID: PMC4420074 DOI: 10.1107/s2056989015006374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2015] [Accepted: 03/29/2015] [Indexed: 11/10/2022]
Abstract
The title compound, C14H13NO2, exists as a zwitterion in the solid state, with the H atom of the phenol group transferred to the imine N atom. The dihedral angle between the planes of the benzene rings is 10.13 (9)°. Intra-molecular N-H⋯O hydrogen bond generate S(6) and S(5) loops. In the crystal, mol-ecules are connected by O-H⋯O hydrogen bonds, generating C(9) chains propagating in the [010] direction.
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Affiliation(s)
- Suresh Shalini
- Chemistry Research Centre (Affiliated to Kuvempu University), SSMRV Degree College, Jayanagar 4th T Block, Bangalore 560 041, Karnataka, India
| | - C. R. Girija
- Govt. Science College, Nrupatunga Road, Ambedkar Veedhi, Sampangi Rama Nagar, Bengaluru 560 001, Karnataka, India
| | - Mukesh M. Jotani
- Department of Physics, Bhavans Sheth R. A. College of Science, Khanpur, Ahmedabad 380 001, Gujarat, India
| | - C. D. Sathish
- Department of Chemistry, PESIT, BSK III Stage, Bangalore 560 085, India
| | - T. V. Venkatesha
- Department of Chemistry, Jnana Sahyadri, Kuvempu University, Shankaragatta 577 451, India
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Shanbhag AV, Venkatesha TV, Praveen BM, Abd Hamid SB. Inhibition Effects of Chloroquinolines on Corrosion of Mild Steel in Hydrochloric Acid Solution. J Iron Steel Res Int 2014; 21:804-808. [DOI: 10.1016/s1006-706x(14)60145-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Pavithra MK, Venkatesha TV, Punith Kumar MK, Anantha NS. Synergistic effect of colchicine and iodide ions on the corrosion of mild steel in 0.5 M H2SO4. Res Chem Intermed 2014. [DOI: 10.1007/s11164-014-1701-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Abstract
Zinc–halloysite nanotube (HNT) composite coatings through electrodeposition technique were successfully fabricated on mild steel substrate.
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Affiliation(s)
- S. Ranganatha
- Department of studies in chemistry
- School of chemical sciences
- Kuvempu University
- Shimoga, India
| | - T. V. Venkatesha
- Department of studies in chemistry
- School of chemical sciences
- Kuvempu University
- Shimoga, India
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Shubha HN, Venkatesha TV, Vathsala K, Pavitra MK, Kumar MKP. Preparation of self assembled sodium oleate monolayer on mild steel and its corrosion inhibition behavior in saline water. ACS Appl Mater Interfaces 2013; 5:10738-10744. [PMID: 24144468 DOI: 10.1021/am4028857] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A self assembled monolayer (SAM) of sodium oleate was generated on mild steel by the dip coating method. Formation of the SAM on mild steel was examined using Infrared Reflection Absorption Spectroscopy (IRRAS) and contact angle measurements. The chemical and anticorrosive properties of the SAM were analyzed using different techniques. IRRAS and water contact angle data revealed the crystallinity and chemical stability of the SAM modified mild steel. The electrochemical measurements showed that the mild steel with the sodium oleate derived SAM exhibited better corrosion resistance in saline water. The effect of temperature and pH on the SAM formation and its anti corrosion ability was explored.
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Affiliation(s)
- H N Shubha
- Department of Studies in Chemistry, School of Chemical Sciences, Kuvempu University , Shankaraghatta 577451, Karnataka, India
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Shalini S, Girija CR, Simon L, Srinivasan KK, Venkatesha TV. rac-3-(4-Hy-droxy-benz-yl)chroman-4-one. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1011-2. [PMID: 24046596 PMCID: PMC3772453 DOI: 10.1107/s1600536813014645] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2013] [Accepted: 05/27/2013] [Indexed: 11/10/2022]
Abstract
In the racemic title compound, C16H14O3, the ring of the 4-hy-droxy-benzyl substituent group forms a dihedral angle of 80.12 (12)° with the benzene ring of the chromanone system. Two C atoms of the pyran-one ring and the H atoms on the benzyl α-C atom are disordered over two sites, with site-occupation factors of 0.818 (8) and 0.182 (8). The crystal structure is stabilized by O-H⋯O hydrogen bonds, which form parallel one-dimensional zigzag chains down the c axis and are inter-connected by both methine C-H⋯O hydrogen bonds and weak aromatic C-H⋯π inter-actions, giving a sheet structure lying parallel to [011].
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Affiliation(s)
- S Shalini
- Department of Chemistry, Chemistry Research Centre (Affiliated to Kuvempu University), SSMRV Degree College, Jayanagar 4th T Block, Bangalore 560 041, India
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Shalini S, Girija CR, Simon L, Srinivasan KK, Venkatesha TV, Jotani MM. 3-(3,4-Dimeth-oxy-benz-yl)chroman-4-one. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o241. [PMID: 23424520 PMCID: PMC3569774 DOI: 10.1107/s1600536813000925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2012] [Accepted: 01/10/2013] [Indexed: 11/13/2022]
Abstract
In the title compound, C18H18O4, the six-membered chroman-4-one ring adopts an envelope conformation with the C atom bonded to the bridging CH2 atom as the flap. The dihedral angle between the mean plane of the fused pyranone ring and the dimethoxy-substituted benzene ring is 89.72 (2)°. In the crystal, adjacent molecules are linked via C—H⋯π interactions.
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Affiliation(s)
- S Shalini
- Chemistry Research Centre (affiliated to Kuvempu University), SSMRV Degree College, 4th T Block, Jayanagar, Bangalore 560 041, India
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Punith Kumar MK, Venkatesha TV, Pavithra MK, Shetty AN. A Study on Corrosion Behavior of Electrodeposited Zn-Rutile TiO2 Composite Coatings. ACTA ACUST UNITED AC 2012. [DOI: 10.1080/15533174.2012.682684] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- M. K. Punith Kumar
- a Department of PG Studies & Research in Chemistry , Kuvempu University , Shankaraghatta , India
| | - T. V. Venkatesha
- a Department of PG Studies & Research in Chemistry , Kuvempu University , Shankaraghatta , India
| | - M. K. Pavithra
- a Department of PG Studies & Research in Chemistry , Kuvempu University , Shankaraghatta , India
| | - A. Nithyananda Shetty
- b Department of Chemistry , National Institute of Technology Karnataka , Surathkal , India
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Affiliation(s)
- K. Vathsala
- a Department of Studies in Chemistry, School of Chemical Sciences , Kuvempu University , Shankaraghatta , Karnataka , India
| | - T. V. Venkatesha
- a Department of Studies in Chemistry, School of Chemical Sciences , Kuvempu University , Shankaraghatta , Karnataka , India
| | - S. Ranganatha
- a Department of Studies in Chemistry, School of Chemical Sciences , Kuvempu University , Shankaraghatta , Karnataka , India
| | - M. K. Punith Kumar
- a Department of Studies in Chemistry, School of Chemical Sciences , Kuvempu University , Shankaraghatta , Karnataka , India
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Affiliation(s)
- C. M. Praveen Kumar
- a Department of Studies in Chemistry , School of Chemical Sciences, Kuvempu University , Shankaraghatta , Karnataka , India
| | - T. V. Venkatesha
- a Department of Studies in Chemistry , School of Chemical Sciences, Kuvempu University , Shankaraghatta , Karnataka , India
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Mahesh KC, Manjunatha H, Venkatesha TV, Suresh GS. Study of lithium ion intercalation/de-intercalation into LiNi1/3Mn1/3Co1/3O2 in aqueous solution using electrochemical impedance spectroscopy. J Solid State Electrochem 2012. [DOI: 10.1007/s10008-012-1739-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Girija CR, Shalini S, Jotani MM, Venkatesha TV, Rao GN. Crystal structure and semi-empirical quantum chemical calculation of 1,5-bis(3-thiophenyl)-1,4-pentadiene-3-one. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311094177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Shivashankaraiah RB, Manjunatha H, Mahesh KC, Suresh GS, Venkatesha TV. Electrochemical characterization of polypyrrole–LiNi1/3Mn1/3Co1/3O2 composite cathode material for aqueous rechargeable lithium batteries. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1520-7] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Abstract
Zn-Fe alloy electrodeposition was carried out in the presence of condensation product 2-{[(1E)-(3,4-dimethoxyphenyl)methylidene]amino}-3-hydroxypropanoic acid formed between veratraldehyde and serine in acid sulphate bath. Hull cell was used for optimizing the operating parameters and bath constituents. During deposition, the potential was shifted towards cathodic direction in the presence of addition agents and brightener. The polarization studies show that deposition taking place in basic bath and optimum bath was 1.08 and 1.15 V, respectively. Current efficiency and throwing power were reached around 85% and 26%, respectively. The SEM images of bright deposit indicated its fine-grained nature and appreciable reduction in the grain size. XRD studies have showed that the grain size of the deposit generated from optimum bath was 16 nm. UV-visible spectroscopic studies confirm the formation of complex between metal ion and brightener.
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Affiliation(s)
- B. M. Praveen
- Department of Chemistry, Srinivas School of Engineering, Mukka Mangalore 575 021, India
| | - T. V. Venkatesha
- Department of PG Studies and Research in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577 451, India
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Praveen BM, Venkatesha TV. Electrodeposition and Corrosion Resistance Properties of Zn-Ni/TiO2Nano composite Coatings. International Journal of Electrochemistry 2011. [DOI: 10.4061/2011/261407] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Nano sized TiO2particles were prepared by sol-gel method. TiO2nano particles were dispersed in zinc-nickel sulphate electrolyte and thin film of Zn-Ni-TiO2composite was generated by electrodeposition on mild steel plates. The effect of TiO2on the corrosion behavior and hardness of the composite coatings was investigated. The film was tested for its corrosion resistance property using electrochemical, weight loss, and salt spray methods. The paper revealed higher resistance of composite coating to corrosion. Microhardness of the composite coating was determined. Scanning electron microscope images and X-ray diffraction patterns of coating revealed its fine-grain nature. Average crystalline size of the composite coating was calculated. The anticorrosion mechanism of the composite coating was also discussed.
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Affiliation(s)
- B. M. Praveen
- Department of Chemistry, Srinivas School of Engineering, Mukka, Mangalore 575 021, India
| | - T. V. Venkatesha
- Department of PG Studies and Research in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577451, India
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Nayana KO, Venkatesha TV, Praveen BM, Vathsala K. Synergistic effect of additives on bright nanocrystalline zinc electrodeposition. J APPL ELECTROCHEM 2010. [DOI: 10.1007/s10800-010-0205-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shanbhag AV, Venkatesha TV, Prabhu RA, Kalkhambkar RG, Kulkarni GM. Corrosion inhibition of mild steel in acidic medium using hydrazide derivatives. J APPL ELECTROCHEM 2007. [DOI: 10.1007/s10800-007-9436-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Achary G, Sachin HP, Shivakumara S, Arthoba Naik Y, Venkatesha TV. Surface treatment of zinc by Schiff’s bases and its corrosion study. RUSS J ELECTROCHEM+ 2007. [DOI: 10.1134/s1023193507070154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sachin HP, Achary G, Shiva Kumara S, Arthoba Naik Y, Venkatesha TV. Electrochemical preparation of orthophenylenediamine on different cathodes in sulfuric acid. RUSS J ELECTROCHEM+ 2007. [DOI: 10.1134/s1023193507020085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Prabhu RA, Shanbhag AV, Venkatesha TV. Influence of tramadol [2-[(dimethylamino)methyl]-1-(3-methoxyphenyl) cyclohexanol hydrate] on corrosion inhibition of mild steel in acidic media. J APPL ELECTROCHEM 2007. [DOI: 10.1007/s10800-006-9280-2] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Prashantha K, Rashmi BJ, Venkatesha TV, Lee JH. Spectral characterization of apatite formation on poly(2-hydroxyethylmethacrylate)-TiO2 nanocomposite film prepared by sol-gel process. Spectrochim Acta A Mol Biomol Spectrosc 2006; 65:340-4. [PMID: 16503415 DOI: 10.1016/j.saa.2005.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2005] [Revised: 10/23/2005] [Accepted: 11/02/2005] [Indexed: 05/06/2023]
Abstract
Poly(2-hydroxyethylmethacrylate) films incorporated with titanium dioxide nanoparticles were successfully synthesized by an in situ sol-gel process. The in vitro bioactive properties of the films were assessed after immersion in simulated body fluid for up to 21 days through biomimetic method. Hydroxyapatite formation was observed on the surfaces of nanocomposites. This indicates that prepared composites are bioactive. Fourier transforms infrared spectroscopy, X-ray diffraction patterns, X-ray photoelectron spectroscopy and scanning electron microscope images confirm the hydroxyapatite formation on nanocomposite. The present study provides an analytical method for the assessment of titanium dioxide nanoparticles filled poly(2-hydroxyethylmethacrylate) polymer nanocomposites for biomedical applications.
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Affiliation(s)
- K Prashantha
- Department of Polymer Science and Technology, Division of Advanced Materials Engineering, Chonbuk National University, Duckjin-dong 1Ga 664-14, Jeonju, Jeonbuk 561-756, Republic of Korea.
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