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Santosh MS, Purushotham S, Gopinathan P, Guna V, Dileepkumar VG, Kumar M, Reddy N. Natural sub-bituminous coal as filler enhances mechanical, insulation and flame retardant properties of coir-polypropylene bio-composites. Environ Geochem Health 2023; 45:6955-6965. [PMID: 36725791 DOI: 10.1007/s10653-023-01489-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 11/24/2022] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Additives provide substantial improvement in the properties of composites. Although bio-based composites are preferred over synthetic polymer and metal-based composites, they do not have the requisite properties to meet specific needs. Hence, organic, inorganic and metallic additives are included to improve the properties of bio-based composites. Coal is a readily available resource with high thermal insulation, flame resistance and other properties. This work demonstrates the addition of 20-30% natural sub-bituminous coal as filler for coir-reinforced polypropylene (PP) composites and exhibits an increased tensile strength by 66% and flexural strength by 55% compared to the composites without any filler. Such composites are intended for insulation applications and as a replacement for gypsum-based false ceiling tiles. Various ratios of coal samples were included in the composites and their effect on mechanical, acoustic, thermal insulation, flame and water resistance have been determined. A substantial improvement in both flexural and tensile properties has been observed due to the addition of coal. However, a marginal improvement has been observed in both thermal conductivity (0.65 W/mK) and flame resistance values due to the presence of coal. Adding coal increases the intensity of noise absorption, particularly at a higher frequency, whereas water sorption of the composites tends to decrease with an increase in the coal content. The addition of coal improves and adds unique properties to composites, allowing coir-coal-PP composites to outperform commercially available gypsum-based insulation panels.
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Affiliation(s)
- M S Santosh
- Coal to Hydrogen Energy for Sustainable Solutions (CHESS) Division, CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, PO: FRI, Dhanbad, Jharkhand, 828108, India.
| | - Sanjay Purushotham
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology Campus, Thataguni Post, Bengaluru, 560082, India
| | - P Gopinathan
- Resource Quality Assessment (RQA) Division, CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, PO: FRI, Dhanbad, Jharkhand, 828108, India
| | - Vijaykumar Guna
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology Campus, Thataguni Post, Bengaluru, 560082, India
| | - V G Dileepkumar
- Coal to Hydrogen Energy for Sustainable Solutions (CHESS) Division, CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, PO: FRI, Dhanbad, Jharkhand, 828108, India
| | - Manish Kumar
- Coal Carbonization Division, CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, PO: FRI, Dhanbad, Jharkhand, 828108, India
| | - Narendra Reddy
- Center for Incubation Innovation Research and Consultancy, Jyothy Institute of Technology Campus, Thataguni Post, Bengaluru, 560082, India.
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Nath M, Gopinathan P, Santosh MS, Subramani T, Ramakrishna V, Khan AA, Ravikumar CR. Exploring the potential of sulphur forms in Northeastern Indian coals: Implications in environmental remediation and heavy metal sensing. Chemosphere 2023; 338:139471. [PMID: 37442395 DOI: 10.1016/j.chemosphere.2023.139471] [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] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 07/02/2023] [Accepted: 07/09/2023] [Indexed: 07/15/2023]
Abstract
The Sampar Coalfield in Northeastern India is a source of plentiful coal reserves, which are burnt for energy production and industrial applications, resulting in the release of pollutants such as sulphur , arsenic, and lead, which are hazardous to the environment and public health. In this work, samples from the Sampar coalfield have been analyzed to understand the origin, distribution, and various forms of sulphur and their ability to detect toxic heavy metals. The total sulphur concentration ranged from 4.31% to 6%, with organic sulphur being the predominant form at 69.21%, followed by pyritic sulphur at 16.49% and sulphate sulphur at 14.28%. With high sulphur content, this coal indicates a marine influence in the peat-forming swamps. The samples have also been examined for petrographic and elemental analysis, which have revealed the presence of vitrinite, liptinite, inertinite, carbon, hydrogen, nitrogen, oxygen, and mineral matter. In addition, the same coal sample has also been used for electrochemical sensing-based detection of toxic heavy metals like arsenic and lead, and the findings indicate an improved efficacy. These results are expected to have significant implications in the development of effective bio-based remediation strategies in the region to mitigate the harmful effects of coal-related pollution.
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Affiliation(s)
- Manabendra Nath
- Department of Geology, Gurucharan College, Silchar, Assam, 788004, India
| | - P Gopinathan
- Resource Quality Assessment Division, CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India.
| | - M S Santosh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India; Coal to Hydrogen Energy for Sustainable Solutions (CHESS) Division, CSIR-Central Institute of Mining and Fuel Research(Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India
| | - T Subramani
- Department of Geology, College of Engineering Guindy, Anna University, Chennai, Tamil Nadu, 600025, India
| | - Vallu Ramakrishna
- Resource Quality Assessment Division, CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201002, India
| | - Afaq Ahmad Khan
- Coal to Hydrogen Energy for Sustainable Solutions (CHESS) Division, CSIR-Central Institute of Mining and Fuel Research(Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India
| | - C R Ravikumar
- Research Centre, Department of Science, East West Institute of Technology, Bangalore, 560091, Karnataka, India
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Gopinathan P, Santosh MS, Dileepkumar VG, Subramani T, Reddy R, Masto RE, Maity S. Geochemical, mineralogical and toxicological characteristics of coal fly ash and its environmental impacts. Chemosphere 2022; 307:135710. [PMID: 35842041 DOI: 10.1016/j.chemosphere.2022.135710] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [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: 05/02/2022] [Revised: 06/22/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
Coal and coal-based products (by-products), along with other fossil fuels should be used with caution because of their impact on human health and the global climate. In the light of the environmental impact these fossil fuels cause, it's essential to understand the elemental configuration of coal-derived samples and their impact on the ecosystem. Some reports in past have described, geochemical and mineralogical physiognomies of fly-ash and their impact on the environment. However, a comprehensive investigation of various aspects of fly ash like geochemistry, mineralogy, morphology, and toxicological effects has been very sparse and the present study reports the above aspects. The ICP-OES studies confirm the presence of various elements (Al, Ca, Fe, Mg, Na, P, S, Si, and Ti) in the samples. The XRD analysis exposed the presence of minerals like Quartz, H-Hematite, Anatase, Muscovite, and Rutile, in addition to the various phases such as amorphous and crystalline in the fly-ash. Specific samples also possessed Ilmenite which is uncommon in many other samples. Chromium and lead, the well-known heavy metals to cause soil and water pollution in the neighbourhood were found to be existing in higher concentrations in the fly-ash samples, whereas cadmium was found to be the least among the toxic elements found in the samples. The samples were subjected to FE-SEM analysis, which reveals the presence of irregularly shaped minerals and unburnt carbon known to reduce the burning efficiency of coal, especially in power plants. Toxicology studies reported in the work suggested that fly-ash is toxic to the environment at higher concentrations than at lower concentrations.
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Affiliation(s)
- P Gopinathan
- CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| | - M S Santosh
- CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India.
| | - V G Dileepkumar
- CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India
| | - T Subramani
- Department of Geology, College of Engineering Guindy (CEG), Anna University, Chennai, 600025, Tamil Nadu, India
| | - Roopa Reddy
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology, Bangalore, Karnataka, 560082, India
| | - R E Masto
- CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
| | - Sudip Maity
- CSIR-Central Institute of Mining and Fuel Research (Ministry of Science and Technology, Govt. of India), Dhanbad, Jharkhand, 828108, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201 002, India
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Kumar VGD, Balaji KR, Viswanatha R, Ambika G, Roopa R, Basavaraja BM, Chennabasappa M, Kumar CRR, Chen Z, Bui XT, Santosh MS. Visible light photodegradation of 2,4-dichlorophenol using nanostructured NaBiS 2: Kinetics, cytotoxicity, antimicrobial and electrochemical studies of the photocatalyst. Chemosphere 2022; 287:132174. [PMID: 34826902 DOI: 10.1016/j.chemosphere.2021.132174] [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: 07/01/2021] [Revised: 08/30/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Removal of the hazardous and endocrine-disrupting 2,4-dichlorophenol (2,4-DCP) from water bodies is crucial to maintain the sanctity of the ecosystem. As a low bandgap material (1.37 eV), NaBiS2 was hydrothermally prepared and used as a potential photocatalyst to degrade 2,4-DCP under visible light irradiation. NaBiS2 appeared to be highly stable and remained structurally undeterred despite thermal variations. With a surface area of 6.69 m2/g, NaBiS2 has enough surface-active sites to adsorb the reactive molecules and exhibit a significant photocatalytic activity. In alkaline pH, the adsorption of 2,4-DCP on NaBiS2 appeared to decrease whereas, the acidic and neutral environments favoured the degradation. An increase in the photocatalyst dosage enhanced the degradation efficiency from 81 to 86 %, because of higher vacant adsorbent sites and the electrostatic attraction between NaBiS2 and 2,4-DCP. The dominant scavengers degraded 2,4-DCP by forming a coordination bond between chlorine's lone pair of electrons and the vacant orbitals of bismuth, following the order hole> OH > singlet oxygen. Being non-toxic to both natural and aquatic systems, NaBiS2 exhibits antifungal properties at higher concentrations. Finally, the electron-rich NaBiS2 is an excellent electrocatalyst that effectively degrades organic pollutants and is a promising material for industrial and environmental applications.
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Affiliation(s)
- V G Dileep Kumar
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India; Department of Chemistry, PES University, 100 Ft. Ring Road, BSK 3rd Stage, Bangalore, 560085, Karnataka, India
| | - K R Balaji
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India; Visvesvaraya Technological University, Jnana Sangama, Belgaum, 590018, Karnataka, India
| | - R Viswanatha
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India
| | - G Ambika
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India
| | - R Roopa
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC) and Department of Chemistry, Jyothy Institute of Technology, Tataguni, Off Kanakapura Road, Bangalore, 560082, Karnataka, India
| | - B M Basavaraja
- Department of Chemistry, PES University, 100 Ft. Ring Road, BSK 3rd Stage, Bangalore, 560085, Karnataka, India.
| | - Madhu Chennabasappa
- Department of Physics, Siddaganga Institute of Technology, B.H. Road, Tumakuru, 572103, India
| | - C R Ravi Kumar
- Research Centre, Department of Science, East West Institute of Technology, Bangalore, 560091, Karnataka, India
| | - Zhong Chen
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Xuan-Thanh Bui
- Faculty of Environment and Natural Resources, University of Technology, Vietnam National University - Ho Chi Minh, Ho Chi Minh City, 700000, Viet Nam; Key Laboratory for Advanced Waste Treatment Technology, Vietnam National University - Ho Chi Minh, Ho Chi Minh City, 700000, Viet Nam
| | - M S Santosh
- Coal and Mineral Processing Division, CSIR - Central Institute of Mining and Fuel Research (CIMFR), Digwadih Campus, PO: FRI, Dhanbad, 828108, Jharkhand, India.
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Divakara MB, Ashwini R, Santosh MS, Priyanka M, Ravikumar CR, Viswanatha R, Murthy HCA. Early-stage culprit in protein misfolding diseases investigated using electrochemical parameters: New insights over peptide-membrane interactions. Biomed Pharmacother 2021; 142:111964. [PMID: 34329823 DOI: 10.1016/j.biopha.2021.111964] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 11/16/2022] Open
Abstract
The dysfunctioning of β-cells caused by the unspecific misfolding of the human islet amyloid polypeptide (hIAPP) at the membrane results in type 2 diabetes mellitus. Here, we report for the first time, the early-stage interaction of hIAPP oligomers on the DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine) lipid membrane using electrochemical parameters. Electrochemical techniques are better than other techniques to detect hIAPP at significantly lower concentrations. The surface level interactions between the peptide (hIAPP) and lipid membrane (DMPC) were investigated using atomic force microscopy (AFM), confocal microscopy (CM) and electrochemical techniques such as Tafel polarization, cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). Inserting IAPP into the fluid domains results in breaking the lipid-to-lipid interaction, leading to restriction of membrane mobility. The SLateral values of the liposome and IAPP co-solubilized liposome indicates the cooperative insertion of IAPP. Further, a new method of immobilizing a membrane to the gold surface has been employed, resulting in an electrical contact with the buffer, preventing the direct utilization of a steady-state voltage across the bilayer. The electrochemical studies revealed that the charge transfer resistance decreased for 3-mercaptopropanoic acid modified gold (MPA-Au) electrode coated with the liposome and after the addition of IAPP, followed by an increase in the capacitance. The present study has opened up new dimensions to the understanding of peptide-membrane interactions and shows different experimental approaches for the future researchers in this domain.
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Affiliation(s)
- M B Divakara
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology (Affiliated to Visvesvaraya Technological University (VTU), Belgaum), Thataguni, Off Kanakapura Road, Bengaluru 560082, Karnataka, India
| | - R Ashwini
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology (Affiliated to Visvesvaraya Technological University (VTU), Belgaum), Thataguni, Off Kanakapura Road, Bengaluru 560082, Karnataka, India
| | - M S Santosh
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology (Affiliated to Visvesvaraya Technological University (VTU), Belgaum), Thataguni, Off Kanakapura Road, Bengaluru 560082, Karnataka, India.
| | - M Priyanka
- East Point college of Medical Sciences and Research Centre (affiliated to RGUHS), Jnana Prabha, Virgonagar Post, Bidrahalli, Bengaluru 560049, Karnataka, India
| | - C R Ravikumar
- Research Centre, Department of Science, East West Institute of Technology, Bengaluru 560091, India
| | - R Viswanatha
- Centre for Incubation, Innovation, Research and Consultancy (CIIRC), Jyothy Institute of Technology (Affiliated to Visvesvaraya Technological University (VTU), Belgaum), Thataguni, Off Kanakapura Road, Bengaluru 560082, Karnataka, India
| | - H C Ananda Murthy
- Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia.
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Ilangovan M, Guna V, Olivera S, Ravi A, Muralidhara HB, Santosh MS, Reddy N. Highly porous carbon from a natural cellulose fiber as high efficiency sorbent for lead in waste water. Bioresour Technol 2017; 245:296-299. [PMID: 28898823 DOI: 10.1016/j.biortech.2017.08.141] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 06/23/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
The persistence of hollow centre in the carbon obtained from milkweed floss provides exceptional sorption characteristics, not seen in common biomasses or their derivatives. A considerably high sorption of 320mg of lead per gram of milkweed carbon was achieved without any chemical modification to the biomass. In this research, we have carbonized milkweed floss and used the carbon as a sorbent for lead in waste water. A high surface area of 170m2g-1 and pore volume of 1.07cm3g-1 was seen in the carbon. Almost complete removal (>99% efficiency) of lead could be achieved within 5min when the concentration of lead in the solution was 100ppm, close to that prevailing in industrial waste water. SEM images showed that the carbon was hollow and confocal images confirmed that the sorbate could penetrate inside the hollow tube.
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Affiliation(s)
- Manikandan Ilangovan
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India
| | - Vijaykumar Guna
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India; Visvesvaraya Technological University-Research Resource Centre, Jnana Sangama Belagavi 590018, Karnataka, India
| | - Sharon Olivera
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India; Visvesvaraya Technological University-Research Resource Centre, Jnana Sangama Belagavi 590018, Karnataka, India
| | - Ashwini Ravi
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India; Visvesvaraya Technological University-Research Resource Centre, Jnana Sangama Belagavi 590018, Karnataka, India
| | - H B Muralidhara
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India
| | - M S Santosh
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India
| | - Narendra Reddy
- Centre for Incubation, Innovation, Research and Consultancy, Jyothy Institute of Technology, Thathaguni Post, Bengaluru 560082, Karnataka, India.
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Kishore V, Yarla NS, Zameer F, Nagendra Prasad MN, Santosh MS, More SS, Rao DG, Dhananjaya BL. Inhibition of Group IIA Secretory Phospholipase A2 and its Inflammatory Reactions in Mice by Ethanolic Extract of Andrographis paniculata, a Well-known Medicinal Food. Pharmacognosy Res 2016; 8:213-6. [PMID: 27365993 PMCID: PMC4908853 DOI: 10.4103/0974-8490.182916] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Andrographis paniculata Nees is an important medicinal plant found in the tropical regions of the world, which has been traditionally used in Indian and Chinese medicinal systems. It is also used as medicinal food. A. paniculata is found to exhibit anti-inflammatory activities; however, its inhibitory potential on inflammatory Group IIA phospholipases A2 (PLA2) and its associated inflammatory reactions are not clearly understood. The aim of the present study is to evaluate the inhibitory/neutralizing potential of ethanolic extract of A. paniculata on the isolated inflammatory PLA2 (VRV-PL-VIIIa) from Daboii rusellii pulchella (belonging to Group IIA inflammatory secretory PLA2 [sPLA2]) and its associated edema-induced activities in Swiss albino mice. A. paniculata extract dose dependently inhibited the Group IIA sPLA2 enzymatic activity with an IC50 value of 10.3 ± 0.5 μg/ml. Further, the extract dose dependently inhibited the edema formation, when co-injected with enzyme indicating that a strong correlation exists between lipolytic and pro-inflammatory activities of the enzyme. In conclusion, results of this study shows that the ethanolic extract of A. paniculata effectively inhibits Group IIA sPLA2 and its associated inflammatory activities, which substantiate its anti-inflammatory properties. The results of the present study warranted further studies to develop bioactive compound (s) in ethanolic extract of A. paniculata as potent therapeutic agent (s) for inflammatory diseases.
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Affiliation(s)
- V Kishore
- Department of Research, School of Chemical and Biotechnology, SASTRA University, Thanjavur, Tamil Nadu, India
| | - N S Yarla
- Department of Biochemistry/Bioinformatics, Institute of Science, GITAM University, Visakhapatnam, Andhra Pradesh, India
| | - F Zameer
- Department of Studies in Biotechnology, Microbiology and Biochemistry, Mahajana Life Science Research Centre, SBRR Mahajana First Grade College, Affiliated to University of Mysore, Mysore, Karnataka, India
| | - M N Nagendra Prasad
- Department of Biotechnology, Sri Jayachamarajendra College of Engineering, JSS Institution Campus, Mysore, Karnataka, India
| | - M S Santosh
- Chemical Biology Unit, Centre for Emerging Technologies, Jain University, Ramanagara, Karnataka, India
| | - S S More
- Department of Basic and Applied Sciences, Dayananda Sagar University, Bengaluru, Karnataka, India
| | - D G Rao
- Department of Biochemistry/Bioinformatics, Institute of Science, GITAM University, Visakhapatnam, Andhra Pradesh, India
| | - Bhadrapura Lakkappa Dhananjaya
- Toxinology/Toxicology and Drug Discovery Unit, Centre for Emerging Technologies, Jain University, Kanakapura, Karnataka, India
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Santosh MS, Lyubartsev AP, Mirzoev AA, Bhat DK. Molecular dynamics investigation of dipeptide-transition metal salts in aqueous solutions. J Phys Chem B 2010; 114:16632-40. [PMID: 21086976 DOI: 10.1021/jp108376j] [Citation(s) in RCA: 10] [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: 02/02/2023]
Abstract
Molecular dynamics (MD) simulations of glycylglycine dipeptide with transition metal ions (Mn(2+), Fe(2+), Co(2+), Ni(2+), Cu(2+), and Zn(2+)) in aqueous solutions have been carried out to get an insight into the solvation structure, intermolecular interactions, and salt effects in these systems. The solvation structure and hydrogen bonding were described in terms of radial distribution function (RDF) and spatial distribution function (SDF). The dynamical properties of the solvation structure were also analyzed in terms of diffusion and residence times. The simulation results show the presence of a well-defined first hydration shell around the dipeptide, with water molecules forming hydrogen bonds to the polar groups of the dipeptide. This shell is, however, affected by the strong electric field of divalent metal ions, which at higher ion concentrations lead to the shift in the dipeptide-water RDFs. Higher salt concentrations lead also to increased residence times and slower diffusion rates. In general, smaller ions (Cu(2+), Zn(2+)) demonstrate stronger binding to dipeptide than the larger ones (Fe(2+), Mn(2+)). Simulations do not show any stronger association of peptide molecules indicating their dissolution in water. The above results may be of potential interest to future researchers on these molecular interactions.
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Affiliation(s)
- M S Santosh
- Physical Chemistry Division, Department of Chemistry, National Institute of Technology Karnataka, Surathkal, Mangalore-575025, India
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Santosh MS, Bhat DK. Acoustical and Compressibility Parameters of Glycylglycine−FeCl3in Aqueous Ethanol Mixture atT= (293.15, 303.15, and 313.15) K. Ind Eng Chem Res 2010. [DOI: 10.1021/ie101415y] [Citation(s) in RCA: 6] [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: 11/28/2022]
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