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Akshata CR, Murugan E, Harichandran G. Alginate templated synthesis, characterization and in vitro osteogenic evaluation of strontium-substituted hydroxyapatite. Int J Biol Macromol 2023; 252:126478. [PMID: 37625758 DOI: 10.1016/j.ijbiomac.2023.126478] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 08/27/2023]
Abstract
The objective of this study is to explore the potential role of alginate (Alg) in the crystallization of metal-substituted hydroxyapatite, with application in orthopaedic reconstruction. The alginate at different concentrations (0.5 and 1.0 wt%) facilitated in situ mineralization of hydroxyapatite (HA) and strontium-substituted HA (SHA, 10 and 30 mol%). The incorporation of the biopolymer and dopant induced notable changes in HA, including reduced crystal size from 31.0 to 16.4 nm and increased lattice volume from 577.3 to 598.0 Å3. The superior affinity of alginate for Sr2+ than for Ca2+ resulted in higher residual alginate in Alg/SHA (13.0 to 19.0 %) compared to Alg/HA (7.1 to 8.2 %). This residual alginate influenced composite properties: surface charge decreased from -26.5 to -45.7 mV, microhardness increased from 0.33 to 0.54 GPa, and dissolution increased from 0.17 to 0.39 %. The in vitro studies revealed that strontium substitution as well as the organization and crystallographic aspects of apatite regulated osteoblastic cell survival, proliferation, differentiation, and biomineralization. The findings suggest that an alginate concentration of 0.5 wt% is optimal for the crystallization of SHA with 10 mol% substitution, and its resulting composite possesses the ideal biomechanical properties to imitate native bone.
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Affiliation(s)
- C R Akshata
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
| | - E Murugan
- Department of Physical Chemistry, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
| | - G Harichandran
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
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Murugan E, Akshata CR. Dextrose, maltose and starch guide crystallization of strontium-substituted hydroxyapatite: A comparative study for bone tissue engineering application. Int J Biol Macromol 2023; 248:125927. [PMID: 37481177 DOI: 10.1016/j.ijbiomac.2023.125927] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 07/12/2023] [Accepted: 07/19/2023] [Indexed: 07/24/2023]
Abstract
The influence of carbohydrates on the crystallization of metal-substituted hydroxyapatite predicts its relevance to natural bone growth. This study demonstrates the role of carbohydrates in the crystallization of strontium-substituted hydroxyapatite (SHAP). The increasing order of hydroxyl groups, dextrose (monosaccharide) < maltose (disaccharide) < starch (polysaccharide), coordinated with Ca2+/Sr2+ and thus guided SHAP crystallization, with crystal size reduced from 35 to 19 nm, lattice volume increased from 518 to 537 Å3, and residual carbohydrates increased from 1.8 to 20.2 %. The variation in residual carbohydrates is due to their interaction with apatite and/or aqueous insolubility. Compared to pure SHAP, the starch-SHAP with higher residual starch showed increased water uptake from 1.23 ± 0.18 to 4.26 ± 0.21 % and degradation from 0.22 ± 0.06 to 1.53 ± 0.14 %, but decreased microhardness from 0.73 ± 0.12 to 0.38 ± 0.01 GPa and protein affinity from 4.82 ± 0.01 to 0.81 ± 0.01 μg/mg. However, its microhardness value was bone-like, and the reduced protein adsorption was masked by the rich osteogenic behaviour. In vitro cellular response demonstrated that the residual carbohydrate and strontium augmented osteocompatibility, proliferation, differentiation and biomineralization. The result concludes that carbohydrates drive SHAP crystallization, and starch-SHAP replicates natural bone.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
| | - C R Akshata
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
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Akshata CR, Harichandran G, Murugan E. Effect of pectin on the crystallization of strontium substituted HA for bone reconstruction application. Colloids Surf B Biointerfaces 2023; 226:113312. [PMID: 37068445 DOI: 10.1016/j.colsurfb.2023.113312] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/29/2023] [Accepted: 04/09/2023] [Indexed: 04/19/2023]
Abstract
The biomacropolymers of bone extracellular matrix (ECM) guide the growth of hydroxyapatite (HA) with various ionic substitutions. Pectin, a plant polysaccharide with chemical similarities to ECM, was investigated for its potential to promote the crystallization of strontium-substituted HA (SH). The influence of pectin (0.5 and 1.0 wt%) on the in situ mineralization of SH (10 and 30 mol% calcium substitution with strontium) was studied. The preferential affinity of pectin to strontium over calcium favoured the incorporation of strontium in apatite, decreased crystal size (18.85-26.22 nm) and retained more pectin residues (8-16%). The residual pectin strongly interacted with small SH particles, resulting in high microhardness (0.43-0.85 GPa) and high surface charge (-32.1 to -30.3 mV), while weak interaction with large HA particles resulted in low microhardness (0.15-0.25 GPa) and low surface charge (-35.4 to -34.6 mV). The in vitro cellular study using human osteoblast-like MG-63 cells demonstrated that inorganic size and material crystallinity play a vital role in regulating osteogenesis. The study suggests that the synchronization of low pectin concentration (0.5 wt%) and high strontium substitution in HA (30 mol%) offers the desired microhardness and in vitro osteogenic properties to emulate natural bone.
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Affiliation(s)
- C R Akshata
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
| | - G Harichandran
- Department of Polymer Science, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
| | - E Murugan
- Department of Physical Chemistry, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
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Murugan E, Poongan A. Synchronous electrochemical detection of nanomolar Acetaminophen, Cytosine and Phenylephrine hydrochloride in drugs using Zn3V2O8/ZrO2@f-MWCNTs nanocomposite GC electrode. Results in Chemistry 2023. [DOI: 10.1016/j.rechem.2023.100886] [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: 03/12/2023] Open
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Murugan E, Yogaraj V. Development of a quaternary ammonium poly (amidoamine) dendrimer-based drug carrier for the solubility enhancement and sustained release of furosemide. Front Chem 2023; 11:1123775. [PMID: 36874076 PMCID: PMC9982094 DOI: 10.3389/fchem.2023.1123775] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 01/27/2023] [Indexed: 02/19/2023] Open
Abstract
Furosemide (FRSD) is a loop diuretic that has been categorized as a class IV drug according to the Biopharmaceutics Classification System (BCS). It is used in the treatment of congestive heart failure and edema. Owing to low solubility and permeability, its oral bioavailability is very poor. In this study, two types of poly (amidoamine) dendrimer-based drug carriers (generation G2 and G3) were synthesized to increase the bioavailability of FRSD through solubility enhancement and sustained release. The developed dendrimers enhanced the solubility of FRSD 58- and 109-fold, respectively, compared with pure FRSD. In vitro studies demonstrated that the maximum time taken to release 95% of the drug from G2 and G3 was 420-510 min, respectively, whereas for pure FRSD the maximum time was only 90 min. Such a delayed release is strong evidence for sustained drug release. Cytotoxicity studies using Vero and HBL 100 cell lines through an MTT assay revealed increased cell viability, indicating reduced cytotoxicity and improved bioavailability. Therefore, the present dendrimer-based drug carriers are proven to be prominent, benign, biocompatible, and efficient for poorly soluble drugs, such as FRSD. Therefore, they could be convenient choices for real-time applications of drug delivery.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India
| | - V Yogaraj
- Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai, Tamil Nadu, India
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Murugan E, Akshata CR. Graphene oxide reinforced SrHAP composite as a drug carrier in bone regeneration. Colloids Surf B Biointerfaces 2022; 219:112822. [PMID: 36162178 DOI: 10.1016/j.colsurfb.2022.112822] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 08/16/2022] [Accepted: 08/31/2022] [Indexed: 10/31/2022]
Abstract
Strontium substituted HAP (SrHAP), with a 10 mol% substitution, was mineralized on increasing weight percentages of graphene oxide (2, 4 and 6). The GS composites were comprehensively characterized for drug delivery in bone reconstruction. The formation of SrHAP was verified by XRD and FT-IR results. The apatite crystallization was influenced by graphene oxide content and strontium. The EDS results confirmed the presence of strontium and HR-SEM depicted rod shape apatite, of length between 58 and 135 nm, uniformly embedded on graphene oxide. The reinforcement of graphene oxide increased the surface area, porosity, microhardness (upto 0.59 GPa), protein adsorption (upto 18.16 μg/mg), water uptake and degradation properties. Also, the increase in graphene oxide fraction significantly enhanced the curcumin encapsulation efficiency (upto 80.16%) and the drug release was considerably retarded over SrHAP. The in vitro studies using human osteoblast-like MG-63 cells demonstrated that curcumin-loaded composite was biocompatible and promoted proliferation, differentiation and matrix mineralization. The results highlight the combinational therapy of osteogenic ion (strontium) and osteogenic drug (curcumin) as a promising platform in bone tissue engineering.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
| | - C R Akshata
- Department of Physical Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
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Murugan E, Akshata CR, Ilangovan R, Mohan M. Evaluation of quaternization effect on chitosan-HAP composite for bone tissue engineering application. Colloids Surf B Biointerfaces 2022; 218:112767. [PMID: 36007314 DOI: 10.1016/j.colsurfb.2022.112767] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/30/2022] [Accepted: 08/08/2022] [Indexed: 01/20/2023]
Abstract
This study attempts to improve the aqueous solubility of chitosan and utilizes it in the fabrication of composites with hydroxyapatite (HAP). The composites were evaluated as a curcumin delivery vehicle for bone regeneration. The chitosan was modified by quaternization, with a quaternization degree of 5 % for low quaternized chitosan (LQC) and 11 % for high quaternized chitosan (HQC). The modified chitosan, at alkaline pH 11, facilitated in situ HAP growth and formed LQC-HAP and HQC-HAP composites. The quaternization weakens intermolecular hydrogen bonds, facilitates interaction with the apatite precursor ions and promotes the growth of HAP. The modification significantly improved drug encapsulation (2.6 fold) but at the cost of a slight decrease in mechanical strength and increase in drug release. The in vitro studies with human osteoblast-like MG-63 cells established that the curcumin-loaded composites, LQC-HAP-C and HQC-HAP-C are biocompatible, encourage proliferation and promote a 2-fold increase in calcium mineralization over drug-free composites. The study exemplifies the reciprocity between quaternization degree and drug load/release properties and also illustrates that the magnitude of the latter reflects bioactivity. Thus, the quaternized chitosan-based HAP composite with tailorable bio-physicochemical properties becomes an interesting drug delivery system in bone regeneration.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Sciences University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India.
| | - C R Akshata
- Department of Physical Chemistry, School of Chemical Sciences University of Madras, Guindy Campus, Chennai 600025, Tamil Nadu, India
| | - R Ilangovan
- Department of Endocrinology, Dr. ALM PG Institute of Basic Medical Sciences University of Madras, Taramani Campus, Chennai 600113, Tamil Nadu, India
| | - Manju Mohan
- Department of Endocrinology, Dr. ALM PG Institute of Basic Medical Sciences University of Madras, Taramani Campus, Chennai 600113, Tamil Nadu, India
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Murugan E, Poongan A, Dhamodharan A. Electrochemical sensing of acetaminophen, phenylephrine hydrochloride and cytosine in drugs and blood serum samples using β-AgVO3/ZrO2@g-C3N4 composite coated GC electrode. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118447] [Citation(s) in RCA: 2] [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: 12/19/2022]
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Santhoshkumar S, Murugan E. Size controlled silver nanoparticles on β-cyclodextrin/graphitic carbon nitride: an excellent nanohybrid material for SERS and catalytic applications. Dalton Trans 2021; 50:17988-18000. [PMID: 34851335 DOI: 10.1039/d1dt02809j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A nanohybrid (NH), having high dispersion of silver nanoparticles (AgNPs) on β-cyclodextrin (β-CD)/graphitic carbon nitride (g-CN), designated as AgNPs/β-CD/g-CN-NH, was synthesized and characterized. It was exploited for a couple of environmental remediation applications like SERS sensing and catalytic reduction of specific organic pollutants in water. It showed excellent SERS activity as a Raman probe for the detection of malachite green (MG). Its enhancement factor (EF) and detection limit for MG were equal to 7.26 × 106 and 1 × 10-9 M, respectively. The relative standard deviation (RSD) was equal to 3.8% which indicates high homogeneity of AgNP dispersion and signal reproducibility of the SERS substrate. The NH displayed high catalytic activity for the reduction of eosin yellow (EY) in the presence of NaBH4 with the rate constant (k) of 0.1142 min-1. A comparison of the present NH with other reported materials reveals better SERS and catalytic activities of the former than those of the latter. The SERS activity of the NH was also examined for sensing of other triphenylamine dyes like methyl violet (MV), and it was successful. The same NH also exhibited high catalytic activity towards the reduction of Congo red (CR). The results of both studies clarify that the NH is an excellent SERS substrate and efficient catalyst for the detection of organic environmental pollutants having structures similar to MG and their degradation. This is due to the distribution of the controlled size of AgNPs on g-CN promoted by β-CD. Therefore, we focus our attention on future environmental applications of the nanohybrid as a very cheap SERS substrate and a very active catalyst.
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Affiliation(s)
- S Santhoshkumar
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Guindy, Chennai-25, India.
| | - E Murugan
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Guindy, Chennai-25, India.
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Murugan E, Govindaraju S, Santhoshkumar S. Hydrothermal synthesis, characterization and electrochemical behavior of NiMoO4 nanoflower and NiMoO4/rGO nanocomposite for high-performance supercapacitors. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138973] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Ratnayake S, Sandaruwan C, Mantilaka M, de Silva N, Dahanayake D, Wanninayake U, Bandara W, Santhoshkumar S, Murugan E, Amaratunga G, de Silva KN. Industrial and environmental significance of photonic zirconia nanoflakes: Influence of boron doping on structure and band states. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2020.12.025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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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Murugan E, Santhoshkumar S, Govindaraju S, Palanichamy M. Silver nanoparticles decorated g-C 3N 4: An efficient SERS substrate for monitoring catalytic reduction and selective Hg 2+ions detection. Spectrochim Acta A Mol Biomol Spectrosc 2021; 246:119036. [PMID: 33070011 DOI: 10.1016/j.saa.2020.119036] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/02/2020] [Accepted: 09/29/2020] [Indexed: 06/11/2023]
Abstract
Graphitic carbon nitride supported Ag NPs(AgNPs@g-C3N4) were synthesized by an in-situ chemical reduction using a green reducing agent, tannic acid. They were characterized by UV-Vis, FTIR, XPS, XRD, FESEM, EDAX and HRTEM. They were very much SERS sensitive, and capable of detecting methylene blue and 4-aminothiophenol at 1 × 10-12 M and 1 × 10-10 M, respectively with the corresponding SERS enhancement factor of 1.4 × 108 and 4.7 × 107. Apart from its high SERS sensitivity, it exhibited high catalytic activity for the reduction of MB with NaBH4. So, their SERS activity and catalytic activity were combined successfully to monitor catalytic reduction of MB by SERS technique. Further, the SERS activity towards MB was also employed for the detection/quantification of free Hg2+ ions in aqueous solution. The SERS intensity of MB drastically decreased in the presence of Hg2+ ions, and hence it provides novel route to detect and quantify the latter. Presence of Ca2+, Mg2+, Cu2+ and Cd2+ions showed zero interference for it. So, this study proves that Ag NPs@g-C3N4 as a unique substrate for multiple SERS applications.
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Affiliation(s)
- E Murugan
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India.
| | - S Santhoshkumar
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - S Govindaraju
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
| | - M Palanichamy
- Department of Physical Chemistry, School of Chemical Science, University of Madras, Guindy Campus, Chennai 600 025, Tamilnadu, India
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Ramesh A, Tamizhdurai P, Gopinath S, Sureshkumar K, Murugan E, Shanthi K. Facile synthesis of core-shell nanocomposites Au catalysts towards abatement of environmental pollutant Rhodamine B. Heliyon 2019; 5:e01005. [PMID: 30705977 PMCID: PMC6348150 DOI: 10.1016/j.heliyon.2018.e01005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 05/29/2018] [Revised: 09/24/2018] [Accepted: 11/29/2018] [Indexed: 10/28/2022] Open
Abstract
Magnetically recoverable Au nanoparticles immobilized/stabilized on core-shell nanocomposites are synthesized by the combination of suspension polymerization as well as surface initiator atom transfer radical polymerization (SI-ATRP) methods. The magnetic core-shell supported Au nanocatalysts are namely Fe3O4-PAC-AuNPs, Fe3O4-PVBC-g-PAC-AuNPs, Fe3O4-HEA-AuNPs, and Fe3O4-PVBC-g-HEA-AuNPs. Among all the catalysts, Fe3O4-PVBC-g-PAC-Au NPs exhibited an excellent activity in the reduction of Rhodamine B with an apparent rate constant of 10.77 × 10-3 s-1 and TOF value of 47.62 × 10-3 s-1 under pseudo-first order reaction condition. Further, Fe3O4-PVBC-g-PAC-Au NPs has an outstanding activity and recyclability without applying any external magnetic field. This new approach provides an exciting potential way in the preparation of recyclable metal nano-catalysts with high catalytic activity.
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Affiliation(s)
- A Ramesh
- Department of Chemistry, Anna University, Chennai 600 025, Tamilnadu, India.,Department of Physical Chemistry, University of Madras, Chennai 600 025 Tamilnadu, India
| | - P Tamizhdurai
- Department of Chemistry, Anna University, Chennai 600 025, Tamilnadu, India
| | - S Gopinath
- Department of Chemistry, Anna University, Chennai 600 025, Tamilnadu, India
| | - K Sureshkumar
- Department of Nanotechnology, Anna University Regional Campus, Coimbatore 641 046, Tamilnadu, India
| | - E Murugan
- Department of Physical Chemistry, University of Madras, Chennai 600 025 Tamilnadu, India
| | - K Shanthi
- Department of Chemistry, Anna University, Chennai 600 025, Tamilnadu, India
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Dispenza C, Sabatino MA, Grimaldi N, Mangione MR, Walo M, Murugan E, Jonsson M. On the origin of functionalization in one-pot radiation synthesis of nanogels from aqueous polymer solutions. RSC Adv 2016. [DOI: 10.1039/c5ra23926e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
E-beam irradiation is a “green”, one-step route for the production of biocompatible nanogels from polymer aqueous solutions. Functional group density is tuned independently from size and molecular weight by a proper choice of irradiation conditions.
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Affiliation(s)
- C. Dispenza
- Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
- School of Chemical Science and Engineering
| | - M. A. Sabatino
- Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - N. Grimaldi
- Dipartimento di Ingegneria Chimica, Gestionale, Informatica, Meccanica
- Università degli Studi di Palermo
- 90128 Palermo
- Italy
| | - M. R. Mangione
- CNR – Istituto di Biofisica (IBF) UOS Palermo
- 90146 Palermo
- Italy
| | - M. Walo
- Centre for Radiation Research and Technology
- Institute of Nuclear Chemistry and Technology
- 03-195 Warsaw
- Poland
| | - E. Murugan
- School of Chemical Science and Engineering
- Applied Physical Chemistry
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
| | - M. Jonsson
- School of Chemical Science and Engineering
- Applied Physical Chemistry
- KTH Royal Institute of Technology
- SE-100 44 Stockholm
- Sweden
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Murugan E, Yogaraj V, Geetha Rani DP, Sinha AK. Evaluation of surface acetylated and internally quaternized poly(propylene imine) dendrimer as a biocompatible drug carrier for piroxicam as a model drug. RSC Adv 2015. [DOI: 10.1039/c5ra20704e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two types of new surface acetylated and internally quaternized poly(propylene imine) dendrimers QPPI-NHAc (G2)/(G3) were prepared, characterized and then demonstrated as potential and biocompatible drug carriers using piroxicam as a model drug.
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Affiliation(s)
- E. Murugan
- Department of Physical Chemistry
- School of Chemical Sciences
- University of Madras
- Chennai – 600 025
- India
| | - V. Yogaraj
- Department of Physical Chemistry
- School of Chemical Sciences
- University of Madras
- Chennai – 600 025
- India
| | - D. P. Geetha Rani
- Department of Physical Chemistry
- School of Chemical Sciences
- University of Madras
- Chennai – 600 025
- India
| | - Alok Kumar Sinha
- Department of Science and Technology
- Nano Mission Division
- New Delhi – 110016
- India
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Murugan E, Vimala G. Synthesis, characterization, and catalytic activity for hybrids of multi-walled carbon nanotube and amphiphilic poly(propyleneimine) dendrimer immobilized with silver and palladium nanoparticle. J Colloid Interface Sci 2013; 396:101-11. [DOI: 10.1016/j.jcis.2012.12.074] [Citation(s) in RCA: 24] [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] [Received: 10/29/2012] [Revised: 12/21/2012] [Accepted: 12/26/2012] [Indexed: 11/27/2022]
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Murugan E, Gopinath P, Shanmugayya V, Mathivanan N. Antibacterial activity of novel insoluble bead-shaped polymer-supported multiquaternary ammonium salts. J Appl Polym Sci 2010. [DOI: 10.1002/app.32284] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Daisy P, Jasmine R, Ignacimuthu S, Murugan E. A novel steroid from Elephantopus scaber L. an ethnomedicinal plant with antidiabetic activity. Phytomedicine 2009; 16:252-257. [PMID: 18693100 DOI: 10.1016/j.phymed.2008.06.001] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Acetone extract of Elephantopus scaber, an ethnomedicnal plant, reduced the blood glucose levels in streptozotocin-induced diabetic rats significantly. Acute toxicity studies revealed the non-toxic nature of the crude extract. Fractionation of the acetone extract yielded a new steroid, 28Nor-22(R)Witha 2,6,23-trienolide. Biological testing of the compound demonstrated a significant antidiabetic activity by reducing the elevated blood glucose levels and restoring the insulin levels in streptozotocin-induced diabetic rats. This compound can be a useful candidate to treat diabetes.
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Affiliation(s)
- P Daisy
- Department of Biotechnology, Holy Cross College, Tiruchirappalli 620002, India
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Balakrishnan T, Murugan E. A Modified Method for the Synthesis and Characterization of a Novel Surface-Enriched (with Active Site) Polymer-Supported Phase Transfer Catalyst Using Vinyltoluene as a Functionality and Its Catalytic Efficiency in Dichlorocarbene Addition to Olefines—A Kinetic Study. Journal of Macromolecular Science, Part A 2003. [DOI: 10.1081/ma-120019890] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Balakrishnan T, Murugan E. Preparation and spectroscopic characterization of surface-enriched (with active sites) polymer-supported phase-transfer catalysts and their efficiency in organic addition reactions: A kinetic study. ACTA ACUST UNITED AC 2002. [DOI: 10.1002/pola.10562] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Balakrishnan T, Murugan E. Synthesis and spectral characterization of surface-enriched polymer-supported phase transfer catalysts and their effects on alkylation of phenylacetone. J Appl Polym Sci 2000. [DOI: 10.1002/(sici)1097-4628(20000418)76:3<408::aid-app16>3.0.co;2-i] [Citation(s) in RCA: 9] [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: 11/10/2022]
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Murugan E, Nanjundan S. Copolymers of p-Nitrobenzyl Acrylate with Methyl Acrylate: Synthesis, Characterization, and Monomer Reactivity Ratios. Journal of Macromolecular Science, Part A 1995. [DOI: 10.1080/10601329508010019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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