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Kalkhambkar AG, S K R, Manjanna J, Malimath G. Effect of expired doxofylline drug on corrosion protection of soft steel in 1 M HCl: Electrochemical, quantum chemical and synergistic effect studies. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100639] [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: 10/17/2022]
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Kalkhambkar AG, Rajappa S, Manjanna J, Malimath G. Saussurea obvallatta leaves extract as a potential eco-friendly corrosion inhibitor for mild steel in 1 M HCl. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109799] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Momin N, Manjanna J, Aruna ST, Senthilkumar S, Reddy DS, Kumar A. Structural and electrical properties of M-doped TiO2 (M = Ni, Cu, Zn) relevant to their application as electrolytes for solid oxide fuel cells. J CHEM SCI 2022. [DOI: 10.1007/s12039-022-02026-4] [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: 10/18/2022]
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Nayaka GP, Zhang Y, Dong P, Wang D, Pai KV, Manjanna J, Santhosh G, Duan J, Zhou Z, Xiao J. Effective and environmentally friendly recycling process designed for LiCoO 2 cathode powders of spent Li-ion batteries using mixture of mild organic acids. Waste Manag 2018; 78:51-57. [PMID: 32559940 DOI: 10.1016/j.wasman.2018.05.030] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 04/20/2018] [Accepted: 05/16/2018] [Indexed: 06/11/2023]
Abstract
An effective and environmentally friendly recycling process designed for LiCoO2 cathode powders of spent Li-ion batteries using mixture of mild organic acids, citric acid (CA), tartaric acid (TA) and ascorbic acid (AA), to recover the metals. Almost complete dissolution of Li and nearly 90% dissolution of Co occurred in at 80 °C for 6 h. The reducing agent, ascorbic acid (AA), converts the dissolved Co(III) to Co(II) thereby selective recovery of Co as Co(II)-oxalate is possible. The formation of Co(III)-and Co(II) complex is evident from the UV-Vis spectra of the dissolved solution as a function of dissolution time. Thus, the reductive-complexing dissolution mechanism is proposed here. These mild organic acids are environmentally benign unlike the mineral acids.
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Affiliation(s)
- G P Nayaka
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Yingjie Zhang
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Peng Dong
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
| | - Ding Wang
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - K V Pai
- Dept. of Industrial Chemistry, Kuvempu University, Shankaraghatta 577 451, India
| | - J Manjanna
- Dept. of Chemistry, Rani Channamma University, Belagavi 591 156, India
| | - G Santhosh
- Dept. of Mechanical Engineering, NMAM Institute of Technology, Nitte 574 110, India
| | - Jianguo Duan
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Zhongren Zhou
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Jie Xiao
- National and Local Joint Engineering Laboratory for Lithium-ion Batteries and Materials Preparation Technology, Key Laboratory of Advanced Battery Materials of Yunnan Province, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China
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Yallappa S, Manjanna J, Dhananjaya BL, Vishwanatha U, Ravishankar B, Gururaj H, Niranjana P, Hungund BS. Phytochemically Functionalized Cu and Ag Nanoparticles Embedded in MWCNTs for Enhanced Antimicrobial and Anticancer Properties. Nanomicro Lett 2015; 8:120-130. [PMID: 30460271 PMCID: PMC6223673 DOI: 10.1007/s40820-015-0066-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 09/07/2015] [Indexed: 05/20/2023]
Abstract
Nanomedicine is an emerging field concerned with the use of precision engineered nanomaterials, which leads to the development of novel remedial and diagnostic modalities for human use. In this study, Cu(NO3)2 and AgNO3 precursors were reduced to copper nanoparticles (CuNPs) and silver nanoparticles (AgNPs) using Terminalia arjuna bark extracts under microwave irradiation in the presence of well-dispersed multi-walled carbon nanotubes (MWCNTs) in aqueous medium. The formation of CuNPs or AgNPs and their functionalization with MWCNTs via bioactive molecules of plant extract were evidenced from UV-Vis spectra, XRD, FTIR, FESEM, EDX, and TEM images. The phytochemically functionalized Cu-MWCNTs and Ag-MWCNTs nanomaterials showed enhanced biocide activity, and the inhibitory activity for bacteria was higher than that of fungus. Furthermore, these biohybrid nanomaterials are non-toxic to normal epithelial cells (Vero), whereas they are highly toxic for tested human cancer cells of MDA-MB-231, HeLa, SiHa, and Hep-G2. The cell viability was found to decrease with the increasing dose from 10 to 50 µg mL-1, as well as incubation time from 24 to 72 h. For instance, the cell viability was found to be ~91 % for normal Vero cells and ~76 % for cancer cells for lower dose of 10 µg mL-1.
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Affiliation(s)
- S. Yallappa
- Department of Industrial Chemistry, Kuvempu University, Shankaraghatta, Shimoga-Dist, 577 451 India
| | - J. Manjanna
- Department of Chemistry, Rani Channamma University, Belagavi, 591 156 India
| | - B. L. Dhananjaya
- Toxicology and Drug Discovery Centre for Emerging Technologies, Jain University, Ramanagara, 562 112 India
| | - U. Vishwanatha
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118 India
| | - B. Ravishankar
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118 India
| | - H. Gururaj
- Department of Electronics, Kuvempu University, Shankarghatta, 577 451 India
| | - P. Niranjana
- Department of Biochemistry, Kuvempu University, Shankarghatta, 577 451 India
| | - B. S. Hungund
- Department of Biotechnology, B.V.B. College of Engineering & Technology, Hubli, 580 031 India
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Yallappa S, Manjanna J, Dhananjaya BL, Vishwanatha U, Ravishankar B, Gururaj H. Phytosynthesis of gold nanoparticles using Mappia foetida leaves extract and their conjugation with folic acid for delivery of doxorubicin to cancer cells. J Mater Sci Mater Med 2015; 26:235. [PMID: 26395360 DOI: 10.1007/s10856-015-5567-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 09/16/2015] [Indexed: 06/05/2023]
Abstract
Mappia foetida leaves extract is used as bioreductant for the synthesis of gold nanoparticles and their application in the efficient delivery of doxorubicin to human cancer cells is reported here. The formation of gold nanoparticles is evident from their characteristic optical absorption at ~560 nm. X-ray diffraction pattern of gold nanoparticles confirmed their fcc structure. Fourier transform infrared spectroscopy shows the bioactive molecules from plant extract capped on the surface of gold nanoparticles and conjugation of doxorubicin along with activated folic acid as navigational molecules for targeted drug delivery. Such a conjugation of gold nanoparticles is characterized by their weight loss, ~35-40 %, due to thermal degradation of plant biomass and conjugated drug along with receptor, as observed in thermogravimetric analysis. The spherical shaped gold nanoparticles (Φ 10-20 nm) are observed by field emission scanning electron microscopy and transmission electron microscopy images and the expected elemental composition by energy dispersive X-ray spectroscopy. Gold nanoparticles conjugated with activated folic acid and doxorubicin complex is found to be toxic for human cancer cells viz., MDA-MB-231, HeLa, SiHa and Hep-G2. Furthermore, the amount of drug released was maximum at pH 5.3 (an ambient condition for intravenous cancer drugs) followed by pH 7.2 and pH 6.8.
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Affiliation(s)
- S Yallappa
- Department of Industrial Chemistry, Kuvempu University, Shankaraghatta, 577 451, India
| | - J Manjanna
- Department of Chemistry, Rani Channamma University, Belagavi, 591 156, India.
| | - B L Dhananjaya
- Toxicology and Drug Discovery Centre for Emerging Technologies, Jain University, Ramanagara, 562 112, India
| | - U Vishwanatha
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118, India
| | - B Ravishankar
- SDM Centre for Research in Ayurveda and Allied Sciences, Udupi, 574 118, India
| | - H Gururaj
- Department of Electronics, Kuvempu University, Shankaraghatta, 577 451, India
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Yallappa S, Manjanna J, Dhananjaya BL. Phytosynthesis of stable Au, Ag and Au-Ag alloy nanoparticles using J. sambac leaves extract, and their enhanced antimicrobial activity in presence of organic antimicrobials. Spectrochim Acta A Mol Biomol Spectrosc 2015; 137:236-43. [PMID: 25222319 DOI: 10.1016/j.saa.2014.08.030] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [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: 03/28/2014] [Revised: 07/15/2014] [Accepted: 08/21/2014] [Indexed: 05/27/2023]
Abstract
A green chemistry approach for the synthesis of Au, Ag and Au-Ag alloy nanoparticles (NPs) using the corresponding metal precursors and Jasminum sambac leaves extract as both reducing and capping media, under microwave irradiation, is reported. During the formation, as expected, the reaction mixture shows marginal decrease in pH and an increase in solution potential. The formation of NPs is evident from their surface plasmon resonance (SPR) peak observed at ∼555 nm for Au, ∼435 nm for Ag and ∼510 nm for Au-Ag alloy. The XRD pattern shows fcc structure while the FTIR spectra indicate the presence of plant residues adsorbed on these NPs. Such a bio-capping of NPs is characterized by their weight loss, ∼35% due to thermal degradation of biomass, as observed in TG analysis. The colloidal dispersion of NPs is stable for about 6 weeks. The near spherical shape of NPs (ϕ20-50 nm) is observed by FE-SEM/TEM images and EDAX gives the expected elemental composition. Furthermore, these NPs showed enhanced antimicrobial activity (∼1-4-fold increase in zone of inhibition) in combination with antimicrobials against test strains. Thus, the phytosynthesized NPs could be used as effective growth inhibitors for various microorganisms.
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Affiliation(s)
- S Yallappa
- Department of Industrial Chemistry, Kuvempu University, Shankarghatta 577 451, India
| | - J Manjanna
- Department of Chemistry, Rani Channamma University, Belagavi 591 156, India.
| | - B L Dhananjaya
- Toxicology and Drug Discovery Unit (CET), Jain University, Ramanagara 562 112, India
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Yallappa S, Manjanna J. Biological Evaluation of Silver Nanoparticles Obtained from T. arjuna Bark Extract as Both Reducing and Capping Agent. J CLUST SCI 2014. [DOI: 10.1007/s10876-014-0722-4] [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: 11/24/2022]
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Yallappa S, Manjanna J, Peethambar SK, Rajeshwara AN, Satyanarayan ND. Green Synthesis of Silver Nanoparticles Using Acacia farnesiana (Sweet Acacia) Seed Extract Under Microwave Irradiation and Their Biological Assessment. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0599-7] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [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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Yallappa S, Manjanna J, Sindhe MA, Satyanarayan ND, Pramod SN, Nagaraja K. Microwave assisted rapid synthesis and biological evaluation of stable copper nanoparticles using T. arjuna bark extract. Spectrochim Acta A Mol Biomol Spectrosc 2013; 110:108-115. [PMID: 23562740 DOI: 10.1016/j.saa.2013.03.005] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 12/25/2012] [Accepted: 03/03/2013] [Indexed: 06/02/2023]
Abstract
Terminalia arjuna (T. arjuna) bark extract is used to reduce Cu(2+)→Cu(0) under microwave irradiation. The formation of copper nanoparticles (CuNPs) is monitored by recording the UV-Vis absorption spectra for surface plasmon resonance (SPR) peak, ~535 nm. The intensity of SPR increased linearly with increasing temperature of the reaction mixture. The formation mechanism of CuNPs is supported by the observed marginal decrease in pH and an increase in solution potential (E) of the reaction mixture. X-ray diffraction (XRD) pattern of the CuNPs agrees with the reported data for Cu metal and the crystallite size is ~23 nm. Fourier transform infrared spectroscopy (FT-IR) and solid-state (13)C NMR shows the presence of plant residues on the CuNPs, i.e., in situ bio-capping is possible by this method. Thermo gravimetric (TG) analysis shows the thermal degradation of plant residue and the conversion of Cu to CuO. Field emission electron microscopic (FESEM) image shows uniform spherical particles obtained here. Elemental analysis by energy dispersive X-ray (EDX) analysis confirms the presence of Cu alone, as expected. The in vitro antimicrobial activity is found to be effective for CuNPs dried at RT when compared to CuNPs dried at 70 °C. In addition, CuNPs shows very good antioxidant property.
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Affiliation(s)
- S Yallappa
- Department of Industrial Chemistry, Kuvempu University, Shankarghatta-577451, Shimoga-Dist., Karnataka, India
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Tripathi VS, Manjanna J, Venkateswaran G, Gokhale BK, Balaji V. Electrolytic Preparation of Vanadium(II) Formate in Pilot-Plant Scale Using Stainless Steel Mesh Electrodes: Dissolution of α-Fe2O3/Fe1.6Cr0.4O3 in an Aqueous VII-NTA Complex. Ind Eng Chem Res 2004. [DOI: 10.1021/ie0400292] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- V. S. Tripathi
- Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - J. Manjanna
- Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - G. Venkateswaran
- Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - B. K. Gokhale
- Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - V. Balaji
- Applied Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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Ananthan P, Venkateswaran G, Manjanna J. Enhanced dissolution of hematite in reductive-complexing formulation under regenerative mode. Chem Eng Sci 2003. [DOI: 10.1016/j.ces.2003.08.017] [Citation(s) in RCA: 5] [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: 10/27/2022]
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