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Aswin P, Sreenavya A, Venkatesha NJ, Ganesh V, Balamurugan S, Sakthivel A. Hydrodeoxygenation of Anisole by Using a Ruthenium‐Containing Nickel‐Iron Hydrotalcite‐Based Catalyst. ChemistrySelect 2022. [DOI: 10.1002/slct.202202523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- P. Aswin
- Department of Chemistry, Inorganic Materials & Heterogeneous Catalysis Laboratory Department of Chemistry School of Physical Sciences Central University of Kerala, Sabarmati Building Thejaswini Hills, Periye P.O. Kasaragod 671320 Kerala India
| | - A. Sreenavya
- Department of Chemistry, Inorganic Materials & Heterogeneous Catalysis Laboratory Department of Chemistry School of Physical Sciences Central University of Kerala, Sabarmati Building Thejaswini Hills, Periye P.O. Kasaragod 671320 Kerala India
| | - N. J. Venkatesha
- Post Graduate Department of Chemistry Visveswarapura College of Science Bangalore Institute of Technology K.R. Road, V.V.Pura Bengaluru 560004 India
| | - V. Ganesh
- Electrodics and Electrocatalysis (EEC) Division, CSIR – Central Electrochemical Research Institute (CSIR–CECRI) Karaikudi 630003 Tamilnadu India
| | - S. Balamurugan
- Advanced Nanomaterials Research Laboratory Department of Nanotechnology Noorul Islam Centre for Higher Education Thuckalay, Kumaracoil 629 180 India
| | - A. Sakthivel
- Department of Chemistry, Inorganic Materials & Heterogeneous Catalysis Laboratory Department of Chemistry School of Physical Sciences Central University of Kerala, Sabarmati Building Thejaswini Hills, Periye P.O. Kasaragod 671320 Kerala India
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Neethu PP, Aswin P, Sreenavya A, Nimisha S, Aswathi PS, Sakthivel A. Ruthenium on α-Ni(OH)2 as potential catalyst for anisole hydrotreating and cinnamyl alcohol oxidation. Reac Kinet Mech Cat 2022. [DOI: 10.1007/s11144-022-02211-z] [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: 10/18/2022]
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Jose PA, Sankarganesh M, Raja JD, Sakthivel A, Annaraj J, Jeyaveeramadhavi S, Girija A. Spectrophotometric and fluorometric detection of DNA/BSA interaction, antimicrobial, anticancer, antioxidant and catalytic activities of biologically active methoxy substituted pyrimidine-ligand capped copper nanoparticles. Spectrochim Acta A Mol Biomol Spectrosc 2022; 267:120454. [PMID: 34666266 DOI: 10.1016/j.saa.2021.120454] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/09/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
New Schiff base ligand (DPMN) was synthesized from the condensation of 2-hydroxy-5-nitrobenzaldehyde and 2-amino-4,6-dimethoxypyrimidine which was confirmed by spectroscopic and analytical methods. Solid air stable copper nanoparticles (DPMN-CuNPs) were synthesized from its copper chloride salt and it is stabilized by the prepared Schiff base ligand by phase transfer assisted synthesis which is a modified Brust-Schiffrin technique. The formation of ligand stabilized copper nanoparticles was confirmed by UV-Visible and FT-IR spectroscopic techniques. The size, surface morphology and quality of DPMN-CuNPs were analyzed by SEM and TEM techniques. Antioxidant activities of DPMN and DPMN-CuNPs with DPPH, SOD, peroxide and nitrous oxide were analyzed by electronic absorption spectroscopy. DNA interaction between DPMN and DPMN-CuNPs with CT-DNA was carried out using electronic absorption, fluorescence, viscometric measurements and cyclic voltammetric techniques. Interaction between BSA and the synthesized compounds analyzed by electronic absorption spectroscopy, Antimicrobial studies confirmed that the synthesized DPMN-CuNPs possess significant biological activities than DPMN. Anticancer results suggest that prepared DPMN-CuNPs have significant anticancer activity against different cancer cell lines and least toxic effect against the normal (NHDF) cell line. Other than the positive response in biological evaluation, our DPMN-CuNPs possess good catalytic activity in methyl orange reduction, methylene blue degradation and nitro phenol reduction.
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Affiliation(s)
- P Adwin Jose
- Department of Chemistry, E.G.S. Pillay Engineering College (Autonomous), Nagapattinum, Tamil Nadu 611 002, India
| | - M Sankarganesh
- Department of Chemistry, The American College, Tallakkulam, Madurai, Tamil Nadu 625 002, India; Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - J Dhaveethu Raja
- Department of Chemistry, The American College, Tallakkulam, Madurai, Tamil Nadu 625 002, India.
| | - A Sakthivel
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, Tamil Nadu 626 005, India
| | - J Annaraj
- Department of Materials Science, School of Chemistry, Madurai Kamaraj University, Madurai, Tamil Nadu 625 021, India
| | - S Jeyaveeramadhavi
- Department of Chemistry, The American College, Tallakkulam, Madurai, Tamil Nadu 625 002, India
| | - A Girija
- Department of Chemistry, Velumanokaran Arts and Science College for Women, Ramanathapuram, Tamil Nadu 623 504, India
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Neethu PP, Sakthivel A. Esterification of biomass-derived levulinic acid using molybdate-intercalated hydrotalcite materials. NEW J CHEM 2022. [DOI: 10.1039/d2nj03625h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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]
Abstract
The molybdate-stabilized MgFe-HT is demonstrated as a potential catalyst for levulinic acid esterification with 93% conversion and 95% butyl-levulinate selectivity.
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Affiliation(s)
- P. P. Neethu
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O. Kasaragod 671320, Kerala, India
| | - A. Sakthivel
- Inorganic Materials & Heterogeneous Catalysis Laboratory, Department of Chemistry, School of Physical Sciences, Central University of Kerala, Sabarmati Building, Tejaswini Hills, Periya P.O. Kasaragod 671320, Kerala, India
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Thangagiri B, Sakthivel A, Jeyasubramanian K, Seenivasan S, Dhaveethu Raja J, Yun K. Removal of hexavalent chromium by biochar derived from Azadirachta indica leaves: Batch and column studies. Chemosphere 2022; 286:131598. [PMID: 34325269 DOI: 10.1016/j.chemosphere.2021.131598] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 06/29/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
This report details the preparation, characterization, and applications of an inexpensive adsorbent obtained from Azadirachta indica leaves (Neem biochar (NBC)) and used to remove Cr(VI) from the synthetic waste water. The obtained NBC was characterized by XRD, FTIR, FESEM, EDX and Zeta potential measurements. Adsorption experiments conducted at various pH levels confirmed that 58.54 mg g-1 of Cr(VI) was removed by NBC at pH 2. Experiments conducted at various temperatures revealed that the Cr(VI) adsorption on NBC fits the Langmuir-type adsorption isotherm. A fixed-bed column study was conducted to obtain breakthrough curve for the adsorption process, which confirmed that the NBC usage rate was 4.63 g/L. Cr(VI)NBC was reactivated by NaOH treatment, and the reactivated NBC was used as a sorbent to remove fresh Cr(VI) from the synthetic waste water repeatedly. A cost analysis was also performed for the Cr(VI) removal confirmed that the process was less expensive.
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Affiliation(s)
- B Thangagiri
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, 626005, Tamil Nadu, India
| | - A Sakthivel
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, 626005, Tamil Nadu, India.
| | - K Jeyasubramanian
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, 626005, Tamil Nadu, India
| | - S Seenivasan
- Department of Environmental Toxicology, Texas Tech University, Lubbock, TX, 79409-1163, USA
| | - J Dhaveethu Raja
- Department of Chemistry, The American College, Madurai, 625 005, India
| | - Kyusik Yun
- Department of BioNano Technology, Gachon University, Seongnam, 13120, Republic of Korea.
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Sreenavya A, Ahammed S, Ramachandran A, Ganesh V, Sakthivel A. Nickel–Ruthenium Bimetallic Species on Hydrotalcite Support: A Potential Hydrogenation Catalyst. Catal Letters 2021. [DOI: 10.1007/s10562-021-03673-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Sakthivel A, Jeyasubramanian K, Thangagiri B, Raja JD. Recent advances in schiff base metal complexes derived from 4-aminoantipyrine derivatives and their potential applications. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128885] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Sharma D, Sakthivel A, Michelraj S, Muthurasu A, Ganesh V. Surfactant Intercalated Mono‐metallic Cobalt Hydrotalcite: Preparation, Characterization, and its Bi‐functional Electrocatalytic Application. ChemistrySelect 2020. [DOI: 10.1002/slct.202002030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dhanjay Sharma
- Department of ChemistryInorganic Materials & Catalysis LaboratoryUniversity of Delhi (North Campus) Delhi 110007 India
| | - A. Sakthivel
- Department of ChemistrySchool of Physical SciencesCentral University of Kerala, Tejaswini Hills Periye P.O. Kasaragod 671320 Kerala India
| | - S. Michelraj
- Electrodics and Electrocatalysis (EEC) DivisionCSIR – CentralElectrochemical Research Institute (CSIR–CECRI) Karaikudi 630003 Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - A. Muthurasu
- Electrodics and Electrocatalysis (EEC) DivisionCSIR – CentralElectrochemical Research Institute (CSIR–CECRI) Karaikudi 630003 Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - V. Ganesh
- Electrodics and Electrocatalysis (EEC) DivisionCSIR – CentralElectrochemical Research Institute (CSIR–CECRI) Karaikudi 630003 Tamilnadu India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
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Sakthivel A, Thangagiri B, Raman N, Joseph J, Guda R, Kasula M, Mitu L. Spectroscopic, SOD, anticancer, antimicrobial, molecular docking and DNA binding properties of bioactive VO(IV), Cu(II), Zn(II), Co(II), Mn(II) and Ni(II) complexes obtained from 3-(2-hydroxy-3-methoxybenzylidene)pentane-2,4-dione. J Biomol Struct Dyn 2020; 39:6500-6514. [PMID: 32794423 DOI: 10.1080/07391102.2020.1801508] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Novel macrocyclic Schiff base complexes [[ML]X; where M = Cu(II), Co(II), Ni(II), Zn(II), Mn(II) and VO(IV); L = macrocyclic ligand; X = Cl2 and SO42-] have been synthesized and characterized by microanalytical, 1H, 13C NMR, IR, Mass, UV-Vis, EPR spectral studies, as well as conductivity data. All the complexes exhibit square-planar geometry except vanadium complex. Magnetic susceptibility measurements and high conductance data reveal the monomeric and electrolytic nature of the complexes. Electronic absorption, cyclic voltammetry, viscosity measurements have been carried out on the interaction of the complexes with DNA. The results suggest that the complexes bind to DNA by intercalation via the aromatic ring of the macrocycle into the base pairs of DNA. Using gel electrophoresis experiment in the presence and absence of oxidant (H2O2) the nuclease cleavage activity of the complexes has been performed on plasmid DNA. The results demonstrate that most of the complexes have promising superoxide dismutase (SOD)-mimetic activity. The in vitro cytotoxicity of ligand and its complexes has also been evaluated against human breast and colon carcinoma cells. Binding interactions and energies of ligand and its metal complexes [ML]2+ (M = VO(IV), Mn(II), Co(II), Ni(II), Cu(II), Zn(II)) against the receptors EGFR and HER2 are performed using the Auto dock module. Consequently, it is found that the ligand is strong inhibitor for EGFR and HER2 while [VOL]SO4 is good inhibitor for EGFR and [ZnL]Cl2 is moderate inhibitor for HER2. The antimicrobial activity of the ligand and its complexes against bacteria Salmonella typhi, Staphylococcus aureus, Escherichia coli and Bacillus subtilis and fungi Aspergillus niger, Aspergillus flavus, Candida Albicans and Rhizoctonia bataicola. The complexes have higher activities than the macrocyclic free Schiff base. Interaction of [VOL]SO4 to the binding sites of target protein EGFR (PDB ID: 4HJ0). Research HighlightsMacrocyclic Schiff base and its metal complexes were synthesized.Complexes bind to DNA by intercalation via the aromatic ring of the macrocycle into the base pairs of DNA.Vanadyl complex is a good inhibitor for EGFR.The complexes of copper, zinc and vanadium show efficient antitumor activity.Copper and vanadium complexes have superior antimicrobial activity than the standards.
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Affiliation(s)
- A Sakthivel
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, India
| | - B Thangagiri
- Department of Chemistry, Mepco Schlenk Engineering College, Sivakasi, India
| | - N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, India
| | - J Joseph
- Department of Chemistry, Noorul Islam Centre for Higher Education, Kumaracoil, Tamil Nadu, India
| | - Ramu Guda
- Department of Chemistry, Kakatiya University, Warangal, India
| | - Mamatha Kasula
- Department of Chemistry, Kakatiya University, Warangal, India
| | - L Mitu
- Department of Nature Sciences, University of Pitesti, Pitesti, Romania
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Muthukumar K, Jayalalitha S, Sureshkumar K, Sakthivel A, Balamurugan K, Ramasamy M. Application of hybrid heuristic technique for optimal shunt capacitors planning problem in radial distribution network. Soft comput 2018. [DOI: 10.1007/s00500-018-03680-y] [Citation(s) in RCA: 1] [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: 11/30/2022]
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Anjali K, Ahmed M, Christopher J, Sakthivel A. Rhodium-calix[4]pyrrole and rhodium-tetraphenyl porphyrin: preparation, surface grafting and their catalytic application in nitro-benzene reduction. Dalton Trans 2018; 47:12353-12361. [DOI: 10.1039/c8dt02151a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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]
Abstract
Rhodium containing macromolecules calix[4]pyrrole (RhCP) and tetraphenyl porphyrin (RhTPP) were prepared, grafted on functionalized SBA-15 and demonstrated as promising catalysts for nitro-arene reduction.
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Affiliation(s)
- K. Anjali
- Department of Chemistry
- Central University of Kerala
- Kasaragod
- India
| | - M. Ahmed
- Department of Chemistry
- University of Delhi
- Delhi
- India
| | | | - A. Sakthivel
- Department of Chemistry
- Central University of Kerala
- Kasaragod
- India
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Sharma D, Sakthivel A. Hydroisomerization of 1-Octene on Rhodium Nanoparticles Supported on Silicate Intercalated Magnesium-Aluminium Hydrotalcite. J Nanosci Nanotechnol 2018; 18:381-385. [PMID: 29768857 DOI: 10.1166/jnn.2018.14566] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Uniformly dispersed Rh nanoparticles on silicate intercalated magnesium-aluminium hydrotalcite were prepared for the first time by an incipient wetness method. FT-IR and powder XRD studies confirmed the presence of a layered structure even after Rh loading. Uniform distribution of Rh nanoparticles on HT materials was confirmed by HR-TEM. The resultant Rh nanoparticle supported HT materials showed good catalytic activity for hydroisomerization of 1-octene.
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Affiliation(s)
- Dhanjay Sharma
- Inorganic Materials and Catalysis Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
| | - A Sakthivel
- Inorganic Materials and Catalysis Laboratory, Department of Chemistry, University of Delhi, Delhi 110007, India
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Trinh A, Wong P, Sakthivel A, Fahey MC, Hennel S, Brown J, Strauss BJ, Ebeling PR, Fuller PJ, Milat F. Fat-Bone Interactions in Adults With Spina Bifida. J Endocr Soc 2017; 1:1301-1311. [PMID: 29264455 PMCID: PMC5686646 DOI: 10.1210/js.2017-00258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2017] [Accepted: 09/15/2017] [Indexed: 12/13/2022] Open
Abstract
Context: Spina bifida (SB) can lead to changes in body composition and bone mineral density (BMD) through diminished ambulation, renal impairment, and anticonvulsant medication. With increased life expectancy, diseases such as obesity and osteoporosis are emerging comorbidities in SB, with limited data to guide management. Objective: To examine the relationship between cardiometabolic factors, body composition, BMD, and minimal trauma fractures (MTFs) in adults with SB. Design: Retrospective cross-sectional study. Setting and Participants: Forty-nine adults with SB (median age, 32.7 years; interquartile range, 22.6 to 39.0) who had undergone dual-energy x-ray absorptiometry imaging at a single tertiary hospital from 2004 to 2015. Results: The mean body mass index was 31.7 ± 7.5 kg/m2; 26 (53.1%) were obese. Using age- and sex-matched fat percentiles from the National Health and Nutrition Examination Survey III, 62.5% had a total body percentage fat greater than the 95th percentile. Low bone mass (defined as a Z-score of ≤−2.0) was present in 21.9% at the L1 vertebra and in 35.1% at the femoral neck. Ten (20.4%) had a history of MTFs. A BMD or Z-score at L1, femoral neck, or total body site did not correlate with the occurrence of MTF. Fat mass was significantly and positively associated with BMD after adjustment for age, sex, and height and accounted for 18.6% of the variance in BMD (P = 0.005). The prevalence of metabolic comorbidities, such as hypertension (20.4%) and obstructive sleep apnea (16.3%), was high. Conclusions: Obesity and low BMD are common in young adults with SB. An increased fat mass correlated significantly with BMD. The prevalence of metabolic complications in patients with SB is increased and deserves further study.
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Affiliation(s)
- Anne Trinh
- Department of Endocrinology, Monash Health, Melbourne, Victoria 3168, Australia.,Hudson Institute of Medical Research, Clayton, Melbourne, Victoria 3168, Australia.,Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
| | - Phillip Wong
- Department of Endocrinology, Monash Health, Melbourne, Victoria 3168, Australia.,Hudson Institute of Medical Research, Clayton, Melbourne, Victoria 3168, Australia.,Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
| | - Anuradha Sakthivel
- Department of General Medicine and Endocrinology, Eastern Health, Melbourne, Victoria 3168, Australia
| | - Michael C Fahey
- Hudson Institute of Medical Research, Clayton, Melbourne, Victoria 3168, Australia.,Department of Paediatrics, Monash Health, Melbourne, Victoria 3168, Australia
| | - Sabine Hennel
- Department of Paediatrics, Monash Health, Melbourne, Victoria 3168, Australia
| | - Justin Brown
- Department of Paediatrics, Monash Health, Melbourne, Victoria 3168, Australia.,Department of Paediatrics, Monash University, Melbourne, Victoria 3168, Australia
| | - Boyd J Strauss
- Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
| | - Peter R Ebeling
- Department of Endocrinology, Monash Health, Melbourne, Victoria 3168, Australia.,Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
| | - Peter J Fuller
- Department of Endocrinology, Monash Health, Melbourne, Victoria 3168, Australia.,Hudson Institute of Medical Research, Clayton, Melbourne, Victoria 3168, Australia.,Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
| | - Frances Milat
- Department of Endocrinology, Monash Health, Melbourne, Victoria 3168, Australia.,Hudson Institute of Medical Research, Clayton, Melbourne, Victoria 3168, Australia.,Department of Medicine, Monash University, Melbourne, Victoria 3168, Australia
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Reekhaye A, Sakthivel A, Nagarajan S, Gowda R. Metachronous bilateral testicular metastases from renal cell carcinoma: a case report. Journal of Clinical Urology 2017. [DOI: 10.1177/2051415815607420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- A Reekhaye
- Department of Urology, James Cook University Hospital, Middlesbrough, UK
| | - A Sakthivel
- Department of Urology, James Cook University Hospital, Middlesbrough, UK
| | - S Nagarajan
- Department of Pathology, James Cook University Hospital, Middlesbrough, UK
| | - R Gowda
- Department of Urology, James Cook University Hospital, Middlesbrough, UK
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Raman N, Sakthivel A, Pravin N. Exploring DNA binding and nucleolytic activity of few 4-aminoantipyrine based amino acid Schiff base complexes: a comparative approach. Spectrochim Acta A Mol Biomol Spectrosc 2014; 125:404-413. [PMID: 24566120 DOI: 10.1016/j.saa.2014.01.108] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/20/2014] [Accepted: 01/22/2014] [Indexed: 06/03/2023]
Abstract
A series of novel Co(II), Cu(II), Ni(II) and Zn(II) complexes were synthesized from Schiff base(s), obtained by the condensation of 4-aminoantipyrine with furfural and amino acid (glycine(L1)/alanine(L2)/valine(L3)) and respective metal(II) chloride. Their structural features and other properties were explored from the analytical and spectral methods. The binding behaviors of the complexes to calf thymus DNA were investigated by absorption spectra, viscosity measurements and cyclic voltammetry. The intrinsic binding constants for the above synthesized complexes are found to be in the order of 10(2) to 10(5) indicating that most of the synthesized complexes are good intercalators. The binding constant values (Kb) clearly indicate that valine Schiff-base complexes have more intercalating ability than alanine and glycine Schiff-base complexes. The results indicate that the complexes bind to DNA through intercalation and act as efficient cleaving agents. The in vitro antibacterial and antifungal assay indicates that these complexes are good antimicrobial agents against various pathogens. The IC50 values of [Ni(L1)2] and [Zn(L1)2] complexes imply that these complexes have preferable ability to scavenge hydroxyl radical.
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Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India.
| | - A Sakthivel
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
| | - N Pravin
- Research Department of Chemistry, VHNSN College, Virudhunagar 626 001, Tamil Nadu, India
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Raman N, Sakthivel A, Raja JD, Rajasekaran K. Designing, Structural Elucidation and Comparison of the Cleavage Ability of Metal Complexes Containing Tetradentate Schiff Bases 1. RUSS J INORG CHEM+ 2014. [DOI: 10.1134/s0036023608020113] [Citation(s) in RCA: 9] [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: 11/22/2022]
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Raman N, Sakthivel A, Jeyamurugan R. Synthesis, structural characterization, antimicrobial, DNA-binding, and photo-induced DNA cleavage activity of some bio-sensitive Schiff base copper(II) complexes. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.539212] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001 , Tamilnadu , India
| | - A. Sakthivel
- b Department of Chemistry , Unnamalai Institute of Technology , Kovilpatti – 628 502 , Tamilnadu , India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar – 626001 , Tamilnadu , India
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Raman N, Sakthivel A, Jeyamurugan R. Synthesis, characterization, DNA binding, photo-induced DNA cleavage, and antimicrobial activity of metal complexes of a Schiff base derived from bis(3-aminophenyl)malonamide. J COORD CHEM 2010. [DOI: 10.1080/00958970903288294] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College , Virudhunagar 626001, India
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Raman N, Sakthivel A, Jeyamurugan R. Binuclear copper and zinc complexes possessing bio-potential ligands: synthesis, characterization, antimicrobial, SOD mimetic, DNA binding, and cleavage studies. J COORD CHEM 2010. [DOI: 10.1080/00958971003699745] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
| | - R. Jeyamurugan
- a Research Department of Chemistry , VHNSN College, Madurai Kamaraj University , Virudhunagar 626001, Tamil Nadu, India
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Raman N, Jeyamurugan R, Sakthivel A, Mitu L. Novel metal-based pharmacologically dynamic agents of transition metal(II) complexes: designing, synthesis, structural elucidation, DNA binding and photo-induced DNA cleavage activity. Spectrochim Acta A Mol Biomol Spectrosc 2010; 75:88-97. [PMID: 19910242 DOI: 10.1016/j.saa.2009.09.047] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2009] [Revised: 09/20/2009] [Accepted: 09/25/2009] [Indexed: 05/28/2023]
Abstract
Novel Schiff base Cu(II), Ni(II), Co(II) and Zn(II) complexes have been designed and synthesized using the macrocyclic ligand derived from the condensation of diethylphthalate with Schiff base, obtained from benzene-1,2-diamine and 3-benzylidene-pentane-2,4-dione. The ligand and its complexes have been characterized by analytical and spectral techniques. DNA binding properties of these complexes have been investigated by UV-vis, viscosity measurements, cyclic voltammetric and differential pulse voltammogram studies. The intrinsic binding constants for Co(II), Ni(II), Cu(II) and Zn(II) complexes are 1.6x10(6), 1.8x10(6), 2.0x10(6) and 1.5x10(6) M(-1) respectively which are obtained from electronic absorption experiment. Control DNA cleavage experiments using pUC19 supercoiled (SC) DNA and minor groove binder (distamycin) suggest the major groove binding tendency for the synthesized complexes. In the presence of a reducing agent like 3-mercaptopropionic acid (MPA), the synthesized complexes show chemical nuclease activity under dark reaction condition. The complexes also show efficient photo-induced DNA cleavage activity on irradiation with a monochromatic UV light of 360 nm in the presence of inhibitors. Control experiments show inhibition of cleavage in the presence of singlet oxygen quencher like sodium azide and enhancement of cleavage in D(2)O, suggesting the formation of singlet oxygen as a reactive species in a type-II process.
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Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar, India.
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Sakthivel A, Nankervis AJ, Conn J, Oats J, Chitturi S. 318. POLYURIA IN PREGNANCY - CHALLENGES OF DIAGNOSIS! Reprod Fertil Dev 2010. [DOI: 10.1071/srb10abs318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Increased urinary frequency is a widely experienced symptom in pregnancy; true polyuria is less common and can have a number of causes. It is essential, however that it should be recognized and appropriately investigated, as it may be potentially life threatening to mother and fetus. Diabetes insipidus (DI) is a rare complication of pregnancy. It can be the first presentation of pre-gestational DI, gestational DI or DI associated with acute fatty liver of pregnancy. The latter conditions are illustrated by the following two clinical cases. Osmotic homeostasis can be altered in pregnancy due to resetting of the osmostat and degradation of vasopressin by vasopressinase secreted by the placenta in increasing quantities in the 2nd and 3rd trimesters. Liver failure results in the availability of higher circulating levels of vasopressinase. These cases highlight the difficulties and importance of diagnosis and treatment. Pregnant women often report polyuria during the 3rd trimester. It is important to have a high level of clinical suspicion for the pathological causes, despite the non-specific presentation as underlying conditions can have catastrophic sequelae.
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Raman N, Sakthivel A, Rajasekaran K. Design, structural elucidation, DNA interaction and antimicrobial activities of metal complexes containing tetraazamacrocyclic Schiff bases. J COORD CHEM 2009. [DOI: 10.1080/00958970802687554] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar, Tamil Nadu, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College , Virudhunagar, Tamil Nadu, India
| | - K. Rajasekaran
- a Research Department of Chemistry , VHNSN College , Virudhunagar, Tamil Nadu, India
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Affiliation(s)
- N. Raman
- a Research Department of Chemistry , VHNSN College , Virudhunagar-626 001, India
| | - S. Johnson Raja
- a Research Department of Chemistry , VHNSN College , Virudhunagar-626 001, India
| | - A. Sakthivel
- a Research Department of Chemistry , VHNSN College , Virudhunagar-626 001, India
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Raman N, Raja SJ, Joseph J, Sakthivel A. Designing, structural elucidation, comparison of DNA cleavage, and antibacterial activity of metal(II) complexes containing tetradentate Schiff base. RUSS J COORD CHEM+ 2008. [DOI: 10.1134/s1070328408110092] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [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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Raman N, Raja JD, Sakthivel A. Design, synthesis, spectroscopic characterization, biological screening, and DNA nuclease activity of transition metal complexes derived from a tridentate Schiff base. RUSS J COORD CHEM+ 2008. [DOI: 10.1134/s107032840806002x] [Citation(s) in RCA: 19] [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: 11/23/2022]
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Raman N, Sakthivel A, Rajasekaran K. Synthesis and spectral characterization of antifungal sensitive schiff base transition metal complexes. Mycobiology 2007; 35:150-153. [PMID: 24015086 PMCID: PMC3763143 DOI: 10.4489/myco.2007.35.3.150] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Indexed: 06/02/2023]
Abstract
New N2O2 donor type Schiff base has been designed and synthesized by condensing acetoacetanilido-4-aminoantipyrine with 2-aminobenzoic acid in ethanol. Solid metal complexes of the Schiff base with Cu(II), Ni(II), Co(II), Mn(II), Zn(II), VO(IV), Hg(II) and Cd(II) metal ions were synthesized and characterized by elemental analyses, magnetic susceptibility, molar conduction, fast atom bombardment (FAB) mass, IR, UV-Vis, and (1)H NMR spectral studies. The data show that the complexes have the composition of ML type. The UV-Vis. and magnetic susceptibility data of the complexes suggest a square-planar geometry around the central metal ion except VO(IV) complex which has square-pyramidal geometry. The in vitro antifungal activities of the compounds were tested against fungi such as Aspergillus niger, Aspergillus flavus, Rhizopus stolonifer, Candida albicans, Rhizoctonia bataicola and Trichoderma harizanum. All the metal complexes showed stronger antifungal activities than the free ligand. The minimum inhibitory concentrations (MIC) of the metal complexes were found in the range of 10~31 µg/ml.
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Affiliation(s)
- N Raman
- Research Department of Chemistry, VHNSN College, Virudhunagar-626 001, India
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Kumar S, Sakthivel A, Chacko KN, Kekre NS, Ganesh G. Shock Wave Lithotripsy in Solitary Functioning Kidneys: Is Prophylactic Stenting Necessary? Urol Int 2006; 77:179-81. [PMID: 16888427 DOI: 10.1159/000093916] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2005] [Accepted: 01/13/2006] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To assess the safety of shock wave lithotripsy (SWL) without prophylactic stents in solitary functioning kidneys. PATIENTS AND METHODS Sixteen solitary functioning kidneys with 23 renal stones with a size of <15 mm were treated with SWL as the primary modality. All patients were counseled about the possibility of obstruction, and treatment was offered to those who consented. The safety of SWL was assessed by the need for interventions and the posttreatment renal function. RESULTS In 14 patients lithotripsy was uneventful. The duration of treatment ranged from 5 to 35 days. One patient with a 15-mm pelvic calculus presented with anuria which resolved before intervention. In 1 patient fragmentation failed, and percutaneous nephrolithotomy was performed. CONCLUSIONS In solitary functioning kidneys, SWL is safe without prophylactic stents in properly selected and closely monitored patients. Avoiding stents decreases costs, duration of treatment, and stent-related morbidity without unduly compromising safety.
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Affiliation(s)
- S Kumar
- Department of Urology, Christian Medical College, Vellore, India.
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Dapurkar S, Sakthivel A, Selvam P. Mesoporous VMCM-41: highly efficient and remarkable catalyst for selective oxidation of cyclohexane to cyclohexanol. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2003.10.067] [Citation(s) in RCA: 46] [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: 10/26/2022]
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Badamali S, Sakthivel A, Selvam P. Influence of aluminium sources on the synthesis and catalytic activity of mesoporous AlMCM-41 molecular sieves. Catal Today 2000. [DOI: 10.1016/s0920-5861(00)00471-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.8] [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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Young RA, Sakthivel A, Moss TS, Paiva-Santos CO. DBWS-9411 – an upgrade of theDBWS*.* programs for Rietveld refinement with PC and mainframe computers. J Appl Crystallogr 1995. [DOI: 10.1107/s0021889895002160] [Citation(s) in RCA: 607] [Impact Index Per Article: 20.9] [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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DeBoer BG, Sakthivel A, Cagle JR, Young RA. Determination of the antimony substitution site in calcium fluorapatite from powder X-ray diffraction data. Acta Crystallogr B Struct Sci 1991. [DOI: 10.1107/s0108768191004986] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Sriram K, Sakthivel A. Sciatic nerve palsy in the new born. Ann Acad Med Singap 1981; 10:472-5. [PMID: 7344575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Twelve new born children with sciatic nerve paralysis are reported in this paper. Complete paralysis was present in six and partial paralysis in six neonates. In all cases of breech delivery, a definite history of prolonged labour and forceful extraction by pulling the leg of the fetus was obtained. explained. The relevant literature has been reviewed. Follow up radiological examination in two children showed delayed ossification of the femoral head on the affected side. Recovery was incomplete in most of the cases with total sciatic nerve palsy.
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