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Rodda SR, Fararoda R, Gopalakrishnan R, Jha N, Réjou-Méchain M, Couteron P, Barbier N, Alfonso A, Bako O, Bassama P, Behera D, Bissiengou P, Biyiha H, Brockelman WY, Chanthorn W, Chauhan P, Dadhwal VK, Dauby G, Deblauwe V, Dongmo N, Droissart V, Jeyakumar S, Jha CS, Kandem NG, Katembo J, Kougue R, Leblanc H, Lewis S, Libalah M, Manikandan M, Martin-Ducup O, Mbock G, Memiaghe H, Mofack G, Mutyala P, Narayanan A, Nathalang A, Ndjock GO, Ngoula F, Nidamanuri RR, Pélissier R, Saatchi S, Sagang LB, Salla P, Simo-Droissart M, Smith TB, Sonké B, Stevart T, Tjomb D, Zebaze D, Zemagho L, Ploton P. LiDAR-based reference aboveground biomass maps for tropical forests of South Asia and Central Africa. Sci Data 2024; 11:334. [PMID: 38575638 PMCID: PMC10995191 DOI: 10.1038/s41597-024-03162-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 03/19/2024] [Indexed: 04/06/2024] Open
Abstract
Accurate mapping and monitoring of tropical forests aboveground biomass (AGB) is crucial to design effective carbon emission reduction strategies and improving our understanding of Earth's carbon cycle. However, existing large-scale maps of tropical forest AGB generated through combinations of Earth Observation (EO) and forest inventory data show markedly divergent estimates, even after accounting for reported uncertainties. To address this, a network of high-quality reference data is needed to calibrate and validate mapping algorithms. This study aims to generate reference AGB datasets using field inventory plots and airborne LiDAR data for eight sites in Central Africa and five sites in South Asia, two regions largely underrepresented in global reference AGB datasets. The study provides access to these reference AGB maps, including uncertainty maps, at 100 m and 40 m spatial resolutions covering a total LiDAR footprint of 1,11,650 ha [ranging from 150 to 40,000 ha at site level]. These maps serve as calibration/validation datasets to improve the accuracy and reliability of AGB mapping for current and upcoming EO missions (viz., GEDI, BIOMASS, and NISAR).
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Affiliation(s)
- Suraj Reddy Rodda
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India.
- Indian Institute of Space Science and Technology (IIST), Thiruvananthapuram, Kerala, India.
| | - Rakesh Fararoda
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India
| | | | - Nidhi Jha
- College of Forestry, Oregon State University, Corvallis, OR, 97331, USA
| | | | - Pierre Couteron
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
| | - Nicolas Barbier
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
| | - Alonso Alfonso
- Center for Conservation and Sustainability, Smithsonian National Zoo and Conservation Biology Institute, Washington, DC, USA
| | - Ousmane Bako
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Patrick Bassama
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Debabrata Behera
- Department of Ecology, French Institute of Pondicherry, Pondicherry, 605 001, India
| | - Pulcherie Bissiengou
- Institut de pharmacopée et de médecine traditionnelle (Herbier National du Gabon), CENAREST, Libreville, Gabon
| | - Hervé Biyiha
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Warren Y Brockelman
- National Biobank of Thailand (NBT), National Science and Technology Development Agency, Klong Luang, Pathum Thani, Thailand
| | - Wirong Chanthorn
- Department of Environmental Technology and Management, Faculty of Environment, Kasetsart University, Bangkok, 10900, Thailand
| | - Prakash Chauhan
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India
| | | | - Gilles Dauby
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
- International Joint Laboratory DYCOFAC, IRD-UYI-IRGM, P.O Box 1857, Yaoundé, Cameroon
| | - Vincent Deblauwe
- International Institute of Tropical Agriculture (IITA), BP 2008 (Messa), Yaoundé, Cameroon
- Center for Tropical Research, Institute of the Environment and Sustainability, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Narcis Dongmo
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Vincent Droissart
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Selvaraj Jeyakumar
- Department of Ecology, French Institute of Pondicherry, Pondicherry, 605 001, India
| | - Chandra Shekar Jha
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India
| | - Narcisse G Kandem
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - John Katembo
- Institut Supérieur d'Etudes Agronomiques de Bengamisa, République Démocratique du Congo, Congo, France
| | - Ronald Kougue
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Hugo Leblanc
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
| | - Simon Lewis
- Department of Geography, University College London (UCL), London, UK
- School of Geography, University of Leeds, Leeds, UK
| | - Moses Libalah
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Maya Manikandan
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India
| | | | - Germain Mbock
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Hervé Memiaghe
- Institut de pharmacopée et de médecine traditionnelle (Herbier National du Gabon), CENAREST, Libreville, Gabon
| | - Gislain Mofack
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Praveen Mutyala
- Forestry and Ecology Group, National Remote Sensing Centre, ISRO, Hyderabad, 500 037, India
| | - Ayyappan Narayanan
- Department of Ecology, French Institute of Pondicherry, Pondicherry, 605 001, India
| | - Anuttara Nathalang
- National Biobank of Thailand (NBT), National Science and Technology Development Agency, Klong Luang, Pathum Thani, Thailand
| | - Gilbert Oum Ndjock
- Dja Wildlife Reserve, Ministry of Forestry and Wildlife, Yaoundé, Cameroon
| | - Fernandez Ngoula
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Rama Rao Nidamanuri
- Indian Institute of Space Science and Technology (IIST), Thiruvananthapuram, Kerala, India
| | - Raphaël Pélissier
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
| | - Sassan Saatchi
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, 91109, USA
| | - Le Bienfaiteur Sagang
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
- Center for Tropical Research, Institute of the Environment and Sustainability, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Patrick Salla
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Murielle Simo-Droissart
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Thomas B Smith
- Center for Tropical Research, Institute of the Environment and Sustainability, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Bonaventure Sonké
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
- International Joint Laboratory DYCOFAC, IRD-UYI-IRGM, P.O Box 1857, Yaoundé, Cameroon
| | - Tariq Stevart
- Missouri Botanical Garden, Africa & Madagascar Program, 4344 Shaw Blvd., St. Louis, Missouri, 63110, USA
| | - Danièle Tjomb
- Ecole Nationale des Eaux et Forêts de Mbalmayo, Ministère Des Forêts Et De La Faune, Mbalmayo, Cameroon
| | - Donatien Zebaze
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Lise Zemagho
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
| | - Pierre Ploton
- AMAP, Univ Montpellier, IRD, CNRS, INRAE, CIRAD, Montpellier, France
- Plant Systematics and Ecology Laboratory, Higher Teachers' Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroun
- International Joint Laboratory DYCOFAC, IRD-UYI-IRGM, P.O Box 1857, Yaoundé, Cameroon
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G.R S, Arulneyam J, J. V, Manikandan M. Arm Length-Does It Influence Late Response in a Nerve Conduction Study? J Lab Physicians 2023; 15:493-497. [PMID: 37780872 PMCID: PMC10539072 DOI: 10.1055/s-0043-57229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 01/05/2023] [Indexed: 10/03/2023] Open
Abstract
Introduction F wave response, a late response obtained from a motor nerve, can be influenced by various external factors like gender, temperature, height, weight, and limb length, and hence it causes variation in the measured parameters. Since very few studies have studied the impact of arm length on the F wave, this study was conducted to analyze the relation between the arm length on various parameters of F wave and hence to consider the importance of it during conduct of a nerve conduction study. Methods The study was conducted among 40 healthy individuals and 40 diabetics with neuropathy. The arm length was measured in the upper limbs in both the groups and F wave was recorded following a conventional procedure using a standardized instrument. Results This study showed that in the upper limbs of both the groups, there existed a positive correlation for certain parameters like minimum, maximum and mean latencies, persistence, FM latency and M latency, and a negative correlation for chronodispersion. Conclusion F wave parameters should be adjusted for arm length to improve the sensitivity and diagnostic ability of neurological testing.
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Affiliation(s)
- Sathya G.R
- Department of Physiology, Pondicherry Institute of Medical Sciences, Ganapathichetikulam, Puducherry, India
| | - Jayanthi Arulneyam
- Department of Neurology, Pondicherry Institute of Medical Sciences, Ganapathichetikulam, Puducherry, India
| | - Venkatachalam J.
- Department of Social and Preventive Medicine, Jawaharlal Nehru Institute of Post Graduation and Research, Puducherry, India
| | - M. Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichetikulam, Puducherry, India
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Gebreyohannes L, Egigu MC, Manikandan M, Sasikumar JM. Allelopathic Potential of Lantana camara L. Leaf Extracts and Soils Invaded by It on the Growth Performance of Lepidium sativum L. ScientificWorldJournal 2023; 2023:6663686. [PMID: 37214643 PMCID: PMC10199798 DOI: 10.1155/2023/6663686] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/26/2023] [Accepted: 04/29/2023] [Indexed: 05/24/2023] Open
Abstract
Lantana camara is a noxious invasive plant that invades agricultural and natural ecosystems. In the current study, phytotoxicity of hexane and ethanolic leaf extracts of L. camara in different concentrations and soils invaded by it on Lepidium sativum were investigated under laboratory conditions. Soil toxicity was evaluated by comparing the growth of L. sativum on soils sampled from Lantana-invaded and Lantana-free sites. Results showed that extract concentrations and solvent type and their interaction significantly reduced percent seed germination and seedling growth. Compared to control (distilled water), both hexane and ethanol extracts at 5% w/v concentration significantly reduced percent germination and early seedling growth and completely inhibited seed germination at 10% w/v of hexane leaf extract, suggesting that hexane extract has a greater inhibitory effect than ethanolic extract in all the parameters measured. However, growth performance and seed yield of L. sativum grown on soil invaded by Lantana did not significantly vary from those grown on soils sampled from noninvaded sites. The results of this study generally showed that though Lantana leaf extracts have a direct negative allelopathic effect on L. sativum, soils invaded by Lantana have no toxic materials in the soil to directly or indirectly inhibit the growth of L. sativum. Further field studies on allelopathic effects of Lantana on L. sativum are recommended.
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Affiliation(s)
- Likyelesh Gebreyohannes
- School of Biological Sciences and Biotechnology, College of Natural and Computational Sciences, Haramaya University, Haramaya, P.O. Box 138, Ethiopia
| | - Meseret C. Egigu
- School of Biological Sciences and Biotechnology, College of Natural and Computational Sciences, Haramaya University, Haramaya, P.O. Box 138, Ethiopia
| | - M. Manikandan
- School of Biological Sciences and Biotechnology, College of Natural and Computational Sciences, Haramaya University, Haramaya, P.O. Box 138, Ethiopia
| | - J. M. Sasikumar
- School of Biological Sciences and Biotechnology, College of Natural and Computational Sciences, Haramaya University, Haramaya, P.O. Box 138, Ethiopia
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Manikandan M, Manikandan E, Alshgari RA, Karami AM, Ahmad A. NiTe Magnetic Semiconductor Nanorods for Optical Limiting and Hydrogen Peroxide Sensor. J Inorg Organomet Polym Mater 2023. [DOI: 10.1007/s10904-023-02565-4] [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: 02/13/2023]
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Anbumani P, Ashwin V, Narwade PU, Manikandan M. Management Strategy for Chronic Recurrent Temporomandibular Joint Dislocation: A Prospective Study. Indian J Otolaryngol Head Neck Surg 2022; 74:2160-2165. [PMID: 36452708 PMCID: PMC9702252 DOI: 10.1007/s12070-020-02054-x] [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: 04/18/2020] [Accepted: 08/10/2020] [Indexed: 11/26/2022] Open
Abstract
Various approach strategies have been followed for management of temporomandibular joint (TMJ) dislocation. In this study, a total of 12 patients (21 TM joints) with chronic recurrent TMJ dislocations were managed surgically by articular eminectomy due to unsatisfactory outcomes of conservative management methods. An improvement in pain, range of jaw movements and maximal mouth opening was achieved in 10 patients (83.3%).
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Affiliation(s)
- P. Anbumani
- Oral and Maxillofacial Surgery, Chennai, India
| | - V. Ashwin
- Pandit Bhagwat Dayal Sharma Post Graduate Institute of Dental Sciences, Rohtak, India
| | - Pallavi U. Narwade
- Pandit Bhagwat Dayal Sharma Post Graduate Institute of Dental Sciences, Rohtak, India
| | - M. Manikandan
- Pandit Bhagwat Dayal Sharma Post Graduate Institute of Dental Sciences, Rohtak, India
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Gadre S, Manikandan M, Duari P, Chhatar S, Sharma A, Khatri S, Kode J, Barkume M, Kasinathan NK, Nagare M, Patkar M, Ingle A, Kumar M, Kolthur‐Seetharam U, Patra M. A Rationally Designed Bimetallic Platinum (II)‐Ferrocene Antitumor Agent Induces Non‐Apoptotic Cell Death and Exerts
in Vivo
Efficacy. Chemistry 2022; 28:e202201259. [DOI: 10.1002/chem.202201259] [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] [Received: 04/23/2022] [Indexed: 11/11/2022]
Affiliation(s)
- Shubhankar Gadre
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - M. Manikandan
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Prakash Duari
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Sushant Chhatar
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Astha Sharma
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Subhash Khatri
- Molecular Physiology Laboratory Department of Biological Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Jyoti Kode
- Tumor Immunology & Immunotherapy Group (Kode lab) Advanced Centre for Treatment Research & Education in Cancer (ACTREC) Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
- Anti-Cancer Drug Screening Facility (ACDSF), ACTREC Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
- Homi Bhabha National Institute BARC Training School Complex Anushaktinagar Mumbai Maharashtra 400094 India
| | - Madan Barkume
- Anti-Cancer Drug Screening Facility (ACDSF), ACTREC Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
| | - Nirmal Kumar Kasinathan
- Anti-Cancer Drug Screening Facility (ACDSF), ACTREC Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
| | - Manasi Nagare
- Tumor Immunology & Immunotherapy Group (Kode lab) Advanced Centre for Treatment Research & Education in Cancer (ACTREC) Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
- Anti-Cancer Drug Screening Facility (ACDSF), ACTREC Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
| | - Meena Patkar
- Tumor Immunology & Immunotherapy Group (Kode lab) Advanced Centre for Treatment Research & Education in Cancer (ACTREC) Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
| | - Arvind Ingle
- Homi Bhabha National Institute BARC Training School Complex Anushaktinagar Mumbai Maharashtra 400094 India
- Laboratory Animal Facility ACTREC Tata Memorial Centre, Kharghar Navi Mumbai 410210 India
| | - Mukesh Kumar
- Homi Bhabha National Institute BARC Training School Complex Anushaktinagar Mumbai Maharashtra 400094 India
- Protein Crystallography Section Radiation Biology & Health Sciences Division Bhabha Atomic Research Centre Trombay Mumbai 400085 India
| | - Ullas Kolthur‐Seetharam
- Molecular Physiology Laboratory Department of Biological Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
| | - Malay Patra
- Medicinal Chemistry and Cell Biology Laboratory Department of Chemical Sciences Tata Institute of Fundamental Research Homi Bhabha Road Mumbai Maharashtra 400005 India
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Stalin P, Alexander T, Purty A, Manikandan M, Vaishnavi S. Health-seeking behavior for acute health problems during COVID-19 lockdown among the residents of an urban area in Puducherry. Indian J Community Med 2022; 47:299-301. [PMID: 36034256 PMCID: PMC9400363 DOI: 10.4103/ijcm.ijcm_739_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 10/13/2021] [Indexed: 11/06/2022] Open
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Swarnalatha A, Manikandan M. Intra-Vascular Ultra Sound Image Classification System for the Diagnosis of Coronary Artery Disease Using Adaptive Wavelet Transform with Support Vector Machine. j med imaging hlth inform 2021. [DOI: 10.1166/jmihi.2021.3811] [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: 11/23/2022]
Abstract
In this study, an efficient Decision Support System (DSS) is presented to classify coronary artery disease using Intra-Vascular Ultra Sound (IVUS) images. IVUS images are commonly used to diagnose coronary artery diseases. Wavelet transform is a multiresolution texture analysis tool
which is applied to various image analysis and classification systems. Unlike the wavelet transform, Empirical Wavelet Transform (EWT) is a dependent decomposition approach that provides superior temporal and frequency information. Hence, EWT is considered as a feature extraction approach
in this study. Before extracting EWT features, an adaptive non-linear speckle reducing filter; Lee filter is used to remove the IVUS images’ noises. The accumulated energies of EWT sub-bands are computed and fed to four Support Vector Machine (SVM) for coronary plague classification
into five different classes; normal, calcium, fibrous, necrotic (thrombus) and soft plague (fibro-fatty). A total number of 400 IVUS images and their corresponding labeling are obtained from Shifa hospitals, Tirunelveli, Tamilnadu, India. Results prove that the classification of coronary plague
is done with higher accuracy by using the EWT-SVM approach.
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Affiliation(s)
- A. Swarnalatha
- Electronics and Communication Engineering, Loyola Institute of Technology & Science, Kanyakumari 629302, India
| | - M. Manikandan
- Electronics and Communication Engineering, Madras Institute of Technology, Chennai 600044, India
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Sahu P, Mishra A, Wadwekar B, Sanjana E, Manikandan M. Burden of ocular trauma and its effect on vision: A community-based cross-sectional study in the coastal population of South India. J Curr Res Sci Med 2021. [DOI: 10.4103/jcrsm.jcrsm_12_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Kispotta R, Kasinathan A, Kumar Kommu PP, Manikandan M. Analysis of 262 Children with Scrub Typhus Infection: A Single-Center Experience. Am J Trop Med Hyg 2020; 104:622-627. [PMID: 33219642 DOI: 10.4269/ajtmh.20-1019] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 09/30/2020] [Indexed: 12/12/2022] Open
Abstract
Scrub typhus, a vector-borne rickettsiosis, is the leading treatable cause of non-malarial febrile illness in Asia. The myriad of typical and atypical features poses a clinical conundrum. We aimed to study the clinical and laboratory profile of children with scrub typhus infection diagnosed by IgM ELISA. Data of children < 12 years presenting with undifferentiated fever to the pediatric services of a tertiary teaching institute between January 2012 and December 2018 were retrieved. Children with seropositive IgM ELISA (InBios International Kit) for scrub typhus were enrolled in the study. Clinical features, laboratory investigations, treatment received, and the outcome recorded were obtained. Objective evidence of organ dysfunction was taken as severe scrub typhus. In total, 262 children were diagnosed with scrub typhus. The mean age was 5 years, with male preponderance (65%). And, 13 children presented during infancy. Fever was universal, and generalized lymphadenopathy (93.5%) and hepatomegaly (70%) were the common clinical signs. Eschar was identified in 31%, with greater predilection for groin and axilla. Thrombocytopenia was striking in one-third of children. Also, 25 children (9.5%) had severe scrub typhus and 18 required intensive care stay. Elevated aspartate aminotransferase enzyme levels was a predictor of severity ([OR 3.9], P value 0.005) by multivariate analysis. Lymphadenopathy was found significantly associated with eschar (P < 0.005). No mortality was recorded. This 6-year study underscores the varied spectrum of pediatric scrub typhus infection. Zero mortality in our cohort signifies the excellent outcome with judicious first-line antibiotics.
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Affiliation(s)
- Rashmi Kispotta
- Department of Pediatrics, Pondicherry Institute of Medical Sciences, Puducherry, India
| | | | | | - M Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
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Kharey P, Dutta SB, Gorey A, Manikandan M, Kumari A, Vasudevan S, Palani IA, Majumder SK, Gupta S. Pimenta dioicaMediated Biosynthesis of Gold Nanoparticles and Evaluation of Its Potential for Theranostic Applications. ChemistrySelect 2020. [DOI: 10.1002/slct.202001230] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Prashant Kharey
- Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology Indore 453552 India
| | | | - Abhijeet Gorey
- Discipline of Electrical EngineeringIndian Institute of Technology Indore 453552 India
| | - M. Manikandan
- Discipline of Mechanical EngineeringIndian Institute of Technology Indore 453552 India
| | - Anshu Kumari
- Discipline of Biosciences and Biomedical EngineeringIndian Institute of Technology Indore 453552 India
| | - Srivathsan Vasudevan
- Discipline of Electrical EngineeringIndian Institute of Technology Indore 453552 India
- Discipline of Biosciences and Biomedical EngineeringIndian Institute of Technology Indore 453552 India
| | - I. A. Palani
- Discipline of Mechanical EngineeringIndian Institute of Technology Indore 453552 India
| | - S. K. Majumder
- Laser Biomedical Applications DivisionRaja Ramanna Centre for Advanced Technology, Indore 452013 India
- Homi Bhabha National Institute (HBNI)Training School Complex, Anushakti Nagar Mumbai India 400094
| | - Sharad Gupta
- Discipline of Metallurgy Engineering and Materials ScienceIndian Institute of Technology Indore 453552 India
- Discipline of Biosciences and Biomedical EngineeringIndian Institute of Technology Indore 453552 India
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Narendhran S, Shakila PB, Manikandan M, Vinoth V, Rajiv P. Spectroscopic investigation on photocatalytic degradation of methyl orange using Fe 2O 3/WO 3/FeWO 4 nanomaterials. Spectrochim Acta A Mol Biomol Spectrosc 2020; 232:118164. [PMID: 32106029 DOI: 10.1016/j.saa.2020.118164] [Citation(s) in RCA: 4] [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: 11/22/2019] [Revised: 02/15/2020] [Accepted: 02/16/2020] [Indexed: 06/10/2023]
Abstract
In this study, iron oxide (Fe2O3), tungsten oxide (WO3) and iron-tungstate oxide (FeWO4) nanoparticles (NPs) were synthesized by simple precipitation, acid precipitation, and hydrothermal method respectively. All the spectroscopic analysis reveals that as-synthesized NPs are crystalline with a z-average size of 342, 313 and 373 d.nm respectively. The element compositions, shape and size of the NPs were identified with the help of SEM with EDX analysis. FTIR analysis concluded that the presence of functional groups on the surface of NPs and which responsible for capping and formation of NPs. Besides, the as-synthesized NPs have been used as a photocatalyst for the degradation of Methyl Orange (MO) dye under visible irradiation. FeWO4 NPs (98%) show more effective in the degradation of MO as compared to other NPs. Moreover, the degraded MO and its by-products were used to assess their toxicity on Vigna radiata and RAW 264.7 cell line and which were confirmed that degraded by-products were non-hazardous.
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Affiliation(s)
- S Narendhran
- Department of Biotechnology, Sri Krishna Arts and Science College, Kuniamuthur, Coimbatore 641 008, Tamil Nadu, India
| | - P Baby Shakila
- Department of Biotechnology, Sri Krishna Arts and Science College, Kuniamuthur, Coimbatore 641 008, Tamil Nadu, India
| | - M Manikandan
- Department of Biotechnology, Sri Krishna Arts and Science College, Kuniamuthur, Coimbatore 641 008, Tamil Nadu, India
| | - V Vinoth
- Department of Biotechnology, Sri Krishna Arts and Science College, Kuniamuthur, Coimbatore 641 008, Tamil Nadu, India
| | - P Rajiv
- Department of Biotechnology, Karpagam Academy of Higher Education, Coimbatore-21, Tamilnadu, India.
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Manikandan M, Rajagopalan P, Patra N, Jayachandran S, Muralidharan M, Mani Prabu SS, Palani IA, Singh V. Development of Sn-doped ZnO based ecofriendly piezoelectric nanogenerator for energy harvesting application. Nanotechnology 2020; 31:185401. [PMID: 31935698 DOI: 10.1088/1361-6528/ab6b9e] [Citation(s) in RCA: 2] [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: 06/10/2023]
Abstract
In this work, we have a demonstrated zinc oxide (ZnO) polymer-based ecofriendly piezoelectric nanogenerator (PENG) on a paper substrate for an energy harvesting application. The ZnO thin film is developed on the paper substrate, where different doping concentrations of Sn have been investigated systematically to validate the effect of doping towards enhancing the device performance. The piezoelectric potential of the fabricated device is evaluated by applying three different loads (4 N, 8 N, 22 N), where the source of the corresponding mechanical loads is based on the object of a musical drum stick. The results suggest that the pristine ZnO PENG device can generate a maximum output voltage and current of 2.15 V and 17 nA respectively. Moreover, the ZnO PENG device doped with 2.5% Sn achieved an even higher voltage (4.15 V) and current (36 nA) compared to pristine ZnO devices. In addition, the hydrothermal growth technique used to develop Sn-doped ZnO has the benefits of high scalability and low cost. Hence, the Sn-doped PENG device is a suitable candidate for energy harvesting applications operating in both uniform and non-uniform loading conditions.
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Affiliation(s)
- M Manikandan
- Mechatronics and Instrumentation Lab, Discipline of Mechanical Engineering, Indian Institute of Technology Indore, India
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Stalin P, Manikandan M, Antony V, Murugan N, Singh Z, Kisku KH, Purty AJ, Vasudevan K, Cherian J, Babu V, Pajanivel R, Kalaiselvan G. Identifying and Addressing Factors Contributing to Pretreatment Loss to Follow-Up of Tuberculosis Patients Referred for Treatment from Medical Colleges in Pondicherry: An Implementation Research. Indian J Community Med 2020; 45:27-31. [PMID: 32029980 PMCID: PMC6985961 DOI: 10.4103/ijcm.ijcm_118_19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Background: In India, there is no feedback regarding 34% of tuberculosis (TB) patients diagnosed and referred from medical colleges for treatment to peripheral health institutions (PHIs). Objectives: The aim of this study is to measure the effectiveness of the new intervention package, developed based on qualitative study in reducing pretreatment loss to follow-up (PTLFU) of all TB patients diagnosed and referred for treatment from medical colleges to PHIs. Materials and Methods: An intervention was developed based on the findings of in depth-interviews conducted among different stakeholders such as TB patients who did/did not report, service providers working in four medical colleges in Pondicherry. Intervention consisting of phone calls, home visits, etc., was implemented for a period of 6 months. The baseline and endline proportion of TB patients for whom feedback received was determined from the available records (Revised National TB Control Program State Task Force Quarterly reports). Results: Patient's ignorance, lack of faith in healthcare system, side effects and social stigma, unpleasant experience in hospitals, poor accessibility to directly observed treatment, short-course centers, drugs shortage, poor coordination between program and hospital staff were the risk factors for PTLFU. At baseline, the proportions of feedback received about TB patients referred for treatment from medical colleges to PHIs was 46%. After the initiation of interventions, it increased to 61% and 66% in the first and second quarters of 2017, respectively. Conclusion: Risk factors for PTLFU were multi-factorial related to both patient and health system. Simple, feasible interventions such as phone calls and home visits to TB patients were effective in reducing PTLFU.
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Affiliation(s)
- P Stalin
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - M Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Vincent Antony
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - N Murugan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Zile Singh
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - King Herald Kisku
- Department of Pulmonary Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Anil Jacob Purty
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Kavita Vasudevan
- Department of Community Medicine, Indira Gandhi Medical College and Research Institute, Puducherry, India
| | - Johnson Cherian
- Department of Community Medicine, Indira Gandhi Medical College and Research Institute, Puducherry, India
| | - Venkateswara Babu
- Department of Pulmonary Medicine, Indira Gandhi Medical College and Research Institute, Puducherry, India
| | - R Pajanivel
- Department of Pulmonary Medicine, Mahatma Gandhi Medical College and Research Institute, Puducherry, India
| | - G Kalaiselvan
- Department of Community Medicine, Sri Manakula Vinayagar Medical College and Hospital, Puducherry, India
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Manikandan M, Subramani K, Sathish M, Dhanuskodi S. Hydrothermal synthesis of cobalt telluride nanorods for a high performance hybrid asymmetric supercapacitor. RSC Adv 2020; 10:13632-13641. [PMID: 35493025 PMCID: PMC9051561 DOI: 10.1039/c9ra08692g] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 03/14/2020] [Indexed: 01/08/2023] Open
Abstract
Cobalt telluride nanostructured materials have demonstrated various applications, particularly in energy generation and storage. A high temperature and reducing atmosphere are required for the preparation of cobalt telluride-based materials, which makes this a difficult and expensive process. The development of a facile route for producing the desirable nanostructure of cobalt telluride remains a great challenge. We demonstrated a simple hydrothermal method for preparing cobalt telluride nanorods (CoTe NRs) and telluride nanorods (Te NRs) for supercapacitor applications. The morphology of CoTe NRs and Te NRs was analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The prepared CoTe NR electrode material exhibited a high specific capacity of 170 C g−1 at a current density of 0.5 A g−1 with an exceptional cyclic stability. The asymmetric supercapacitor was assembled using CoTe NRs and orange peel-derived activated carbon (OPAA-700) as a positive and negative electrode, respectively. The fabricated device delivered a high energy density of 40.7 W h kg−1 with a power density of 800 W kg−1 at 1 A g−1 current density. When the current density was increased to 30 A g−1, the fabricated device delivered a high power density of 22.5 kW kg−1 with an energy density of 16.3 W h kg−1. The fabricated asymmetric supercapacitor displayed a good cyclic stability performance for 10 000 cycles at a high current density of 30 A g−1 and retained 85% of its initial capacity for after 10 000 cycles. The prepared materials indicate their applicability for high performance energy storage devices. A one-step hydrothermal derived cobalt telluride nanorods and activated carbon-based hybrid asymmetric supercapacitor delivered a high energy (40.7 W h kg−1) and power density (22.5 kW kg−1) with an electrochemical stability of 85% for 10000 cycles.![]()
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Affiliation(s)
- M. Manikandan
- School of Physics
- Bharathidasan University
- Tiruchirappalli – 620 024
- India
| | - K. Subramani
- Electrochemical Power Sources Division
- CSIR-CECRI
- Karaikudi – 630 003
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - M. Sathish
- Electrochemical Power Sources Division
- CSIR-CECRI
- Karaikudi – 630 003
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - S. Dhanuskodi
- School of Physics
- Bharathidasan University
- Tiruchirappalli – 620 024
- India
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Soler DC, Manikandan M, Gopal SR, Sloan AE, McCormick TS, Stepanyan R. An uncharacterized region within the N-terminus of mouse TMC1 precludes trafficking to plasma membrane in a heterologous cell line. Sci Rep 2019; 9:15263. [PMID: 31649296 PMCID: PMC6813322 DOI: 10.1038/s41598-019-51336-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 09/24/2019] [Indexed: 12/21/2022] Open
Abstract
Mechanotransduction by hair cell stereocilia lies at the heart of sound detection in vertebrates. Considerable effort has been put forth to identify proteins that comprise the hair cell mechanotransduction apparatus. TMC1, a member of the transmembrane channel-like (TMC) family, was identified as a core protein of the mechanotransduction complex in hair cells. However, the inability of TMC1 to traffic through the endoplasmic reticulum in heterologous cellular systems has hindered efforts to characterize its function and fully identify its role in mechanotransduction. We developed a novel approach that allowed for the detection of uncharacterized protein regions, which preclude trafficking to the plasma membrane (PM) in heterologous cells. Tagging N-terminal fragments of TMC1 with Aquaporin 3 (AQP3) and GFP fusion reporter, which intrinsically label PM in HEK293 cells, indicated that residues at the edges of amino acid sequence 138–168 invoke intracellular localization and/or degradation. This signal is able to preclude surface localization of PM protein AQP3 in HEK293 cells. Substitutions of the residues by alanine or serine corroborated that the information determining the intracellular retention is present within amino acid sequence 138–168 of TMC1 N-terminus. This novel signal may preclude the proper trafficking of TMC1 to the PM in heterologous cells.
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Affiliation(s)
- D C Soler
- The Department of Neurosurgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA. .,Brain Tumor and Neuro-Oncology Center, University Hospitals Cleveland Medical Center, Cleveland, OH, USA. .,Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA.
| | - M Manikandan
- Department of Otolaryngology - HNS, Case Western Reserve University, Cleveland, OH, USA
| | - S R Gopal
- Department of Otolaryngology - HNS, Case Western Reserve University, Cleveland, OH, USA
| | - A E Sloan
- The Department of Neurosurgery, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Brain Tumor and Neuro-Oncology Center, University Hospitals Cleveland Medical Center, Cleveland, OH, USA.,Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, OH, USA
| | - T S McCormick
- Department of Dermatology, Case Western Reserve University, Cleveland, OH, USA.,Murdough Family Center for Psoriasis, Case Western Reserve University, Cleveland, OH, USA
| | - R Stepanyan
- Department of Otolaryngology - HNS, Case Western Reserve University, Cleveland, OH, USA. .,Department of Neurosciences, Case Western Reserve University, Cleveland, OH, USA.
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Chinnasami S, Manikandan M, Chandran S, Paulraj R, Ramasamy P. Growth, Hirshfeld surfaces, spectral, quantum chemical calculations, photoconductivity and chemical etching analyses of nonlinear optical p-toluidine p-toluenesulfonate single crystal. Spectrochim Acta A Mol Biomol Spectrosc 2019; 206:340-349. [PMID: 30145495 DOI: 10.1016/j.saa.2018.08.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 08/08/2018] [Accepted: 08/10/2018] [Indexed: 06/08/2023]
Abstract
A single crystal of p-toluidine p-toluenesulfonate (PTPT) has been grown by slow evaporation solution technique (SEST) at room temperature. Single crystal X-ray analysis confirms that grown crystal belongs to the monoclinic structure with space group P21. Intermolecular interactions and fingerprint plots of PTPT molecules are executed by Hirshfeld surface analysis. It was found that H···H (44.2%) contacts have maximum intermolecular interactions contributions in the total Hirshfeld surface area. The characteristic absorption band occurs at below 290 nm. The functional groups were identified using FTIR and FT-Raman analyses and compared with theoretical values. The title molecule contains fourteen CH bonds and three OH bonds. The calculated HOMO and LUMO energy values are -6.125 eV and -1.157 eV, respectively. The chemical potential (μ) and electronegativity (χ) values are estimated to be -3.4938 eV and 3.4938 eV, respectively. The strongest negative hyperconjugation occurs due to the charge transfer from the occupied orbital (σ) to the unoccupied orbital (π*) which is calculated for the σ(N20-C21) → π*(N20-O18). The green and red lines in the total density of states (TDOS) spectrum indicate the occupied orbital and virtual orbital levels, respectively. Photoconductivity studies have been done for the grown crystal. It is observed that the dark current is greater than photocurrent. It shows negative photoconductivity nature of PTPT crystal. The etching analysis was executed on (001) plane of PTPT crystal. It has rectangular shape etch pits patterns.
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Affiliation(s)
- S Chinnasami
- Centre for Crystal Growth, Department of Physics, SSN College of Engineering, Kalavakkam, Tamilnadu 603 110, India
| | - M Manikandan
- Centre for Crystal Growth, Department of Physics, SSN College of Engineering, Kalavakkam, Tamilnadu 603 110, India
| | - Senthilkumar Chandran
- Centre for Crystal Growth, Department of Physics, SSN College of Engineering, Kalavakkam, Tamilnadu 603 110, India
| | - Rajesh Paulraj
- Centre for Crystal Growth, Department of Physics, SSN College of Engineering, Kalavakkam, Tamilnadu 603 110, India.
| | - P Ramasamy
- Centre for Crystal Growth, Department of Physics, SSN College of Engineering, Kalavakkam, Tamilnadu 603 110, India
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Velavan A, Purty AJ, Shringarpure K, Sagili KD, Mishra AK, Selvaraj KS, Manikandan M, Saravanan V. Tuberculosis retreatment outcomes and associated factors: a mixed-methods study from Puducherry, India. Public Health Action 2018; 8:187-193. [PMID: 30775279 DOI: 10.5588/pha.18.0038] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Accepted: 10/11/2018] [Indexed: 12/24/2022] Open
Abstract
Setting: Four Tuberculosis (TB) Units in the Union Territory of Puducherry in India. Objectives: To identify factors associated with unfavourable outcomes among retreatment TB cases in Puducherry. Design: The study had a mixed-methods design in which routinely reported TB data from retreatment TB cases registered during 2014 and 2015 were used for the quantitative part; the qualitative phase comprised interviews and focus group discussions with health care providers. Results: Among the 392 retreatment cases, 297 (75.8%) had favourable outcomes. Outcome for previous treatment such as loss to follow-up (LTFU) (adjusted relative risk [aRR] 1.6, 95%CI 1.1-2.4, P = 0.001), treatment failure (aRR 1.7, 95%CI 1.04-2.8, P = 0.03) and pre-treatment weight <40 kg (aRR 1.8, 95%CI 1.3-2.5, P = 0.001) had increased risk for unfavourable outcomes. Health care providers reported that alcoholism, lack of family support, job-related issues and lack of access to trained staff for injections were some of the reasons for unfavourable outcomes. Providing incentives, nutritional supplements and early retrieval of the LTFU cases were some of the suggestions to reduce unfavourable outcomes. Conclusion: Outcome of previous treatment and low pre-treatment weight of the patient affected retreatment outcomes. Health professionals and workers highlighted social and health system-related factors. Commitment at all levels on the part of health care providers and addressing their concerns can improve retreatment outcomes.
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Affiliation(s)
- A Velavan
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India
| | - A J Purty
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India.,National Task Force, Revised National Tuberculosis Control Programme, New Delhi, India
| | - K Shringarpure
- Department of Preventive and Social Medicine, Medical College of Baroda, Vadodara, Gujarat, India
| | - K D Sagili
- International Union Against Tuberculosis and Lung Disease, South-East Asia Office, New Delhi, India
| | - A K Mishra
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India
| | - K S Selvaraj
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India
| | - M Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India
| | - V Saravanan
- Department of Community Medicine, Pondicherry Institute of Medical Science (PIMS), Puducherry, India
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Kalayarasan M, Shankar S, Manikandan M, Adithan K. Mechanical loading characteristics of total hip prosthetics subjected to dynamic loading cycles. Biomed Mater Eng 2018; 29:723-737. [PMID: 30282330 DOI: 10.3233/bme-181019] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The selection of best material pair in the hip prosthetics design for improved performance and life relies on the estimation of hip joint contact stresses and contact pressure distribution during various dynamic loading cycles: Climbing Upstairs, Climbing downstairs and Knee bending. The maximum Von Mises stress, contact pressure and deformation are considered factors in selecting the material pair in this current study. This is done by analysis of a three-dimensional finite element model of the acetabular component during the different dynamics cycles using ANSYS®. The different material combination of bearing couples considered for this analysis are metal in contact with plastic, metal on metal, metal on ceramic, ceramic on plastic, ceramic on metal and ceramic on ceramic. The numerical results were validated by comparing them with the FEA results of Hai-Bo Jiang et al. for the existing material combinations and a high correlation of 92% was observed. We found that the Alumina femoral head paired with ultra-high molecular weight polyethylene (UHMWPE) cup reduces the maximum Von Mises stress and maximum contact pressure developed at the interface amongst other material pairs.
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Affiliation(s)
- M Kalayarasan
- Department of Mechanical Engineering, PSG College of Technology, Coimbatore, India
| | - S Shankar
- Department of Mechatronics Engineering, Kongu Engineering College, Erode, India
| | - M Manikandan
- Department of Mechanical Engineering, Nandha Engineering College, Erode, India
| | - K Adithan
- Department of Mechanical Engineering, PSG College of Technology, Coimbatore, India
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Manikandan M, Subramani K, Sathish M, Dhanuskodi S. NiTe Nanorods as Electrode Material for High Performance Supercapacitor Applications. ChemistrySelect 2018. [DOI: 10.1002/slct.201801421] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- M. Manikandan
- School of Physics; Bharathidasan University; Tiruchirappalli 620 024 India
| | - K. Subramani
- Functional Materials Division; CSIR-Central Electrochemical Research Institute; Karaikudi - 630 003 India
| | - M. Sathish
- Functional Materials Division; CSIR-Central Electrochemical Research Institute; Karaikudi - 630 003 India
| | - S. Dhanuskodi
- School of Physics; Bharathidasan University; Tiruchirappalli 620 024 India
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Abhinand PA, Manikandan M, Mahalakshmi R, Ragunath PK. Meta-analysis study to evaluate the association of MTHFR C677T polymorphism with risk of ischemic stroke. Bioinformation 2017; 13:214-219. [PMID: 28729765 PMCID: PMC5512861 DOI: 10.6026/97320630013214] [Citation(s) in RCA: 8] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 06/07/2017] [Indexed: 12/02/2022] Open
Abstract
Ischemic stroke is a condition characterized by reduced blood supply to part of the brain, initiating the ischemic cascade, leading to
dysfunction of the brain tissue in that area. It is one of the leading causes of death and disability and is estimated to cause around 5.7
million deaths worldwide. Methyl tetra hydro-folate reductase (MTHFR) is a rate limiting enzyme in the methyl cycle which catalyzes
the only biochemical reaction which produces 5, Methyl tetra hydro folate, the co-substrate for the re-methylation of homocystiene to
produce methionine. MTFHR C677T is a common mutation of MTHFR and those homozygous for the MTFHR C677T produce a
thermo-labile form of the protein with drastically reduced catalytic activity resulting in elevated plasma homocystiene levels - a
common risk factor for cardiovascular diseases. However, the role of MTHFR C677T in ischemic stroke remains unclear. To evaluate
this association, we carried out a meta-analysis of existing published studies, which included 72 studies involving 12390 cases and
16274 controls. The forest plot was made to evaluate the overall risk of the mutation in the etiology of Ischemic Stroke. The overall
Odds- ratio of the study was found to be 1.319 for random effects model, revealing a ∼32% increased risk of Ischemic stroke in the
presence of MTHFR C667T mutation compared to controls. Publication bias in the study was analyzed using funnel plot which
revealed that only 7 studies out of the 72 contributed to publication bias. These 7 studies were excluded and Meta-analysis was
repeated for 65 studies and overall odds-ratio was 1.306, which showed that there was a 30% higher risk of Ischemic stroke in the
presence of MTHFR C667T.
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Affiliation(s)
- P A Abhinand
- Department of Bioinformatics, Sri Ramachandra University, Porur, Chennai-600 116, India
| | - M Manikandan
- Department of Bioinformatics, Sri Ramachandra University, Porur, Chennai-600 116, India
| | - R Mahalakshmi
- Department of Bioinformatics, Sri Ramachandra University, Porur, Chennai-600 116, India
| | - P K Ragunath
- Department of Bioinformatics, Sri Ramachandra University, Porur, Chennai-600 116, India
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Manikandan M, Dhanuskodi S, Maheswari N, Muralidharan G, Revathi C, Rajendra Kumar R, Mohan Rao G. High performance supercapacitor and non-enzymatic hydrogen peroxide sensor based on tellurium nanoparticles. Sensing and Bio-Sensing Research 2017. [DOI: 10.1016/j.sbsr.2017.02.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Jeyapal S, Kommu PPK, Manikandan M, Krishnan L. Performance of Two Different Pulse Oximeters in Neonatal Transition. Indian J Pediatr 2017; 84:7-12. [PMID: 27538981 DOI: 10.1007/s12098-016-2212-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 08/01/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To evaluate the performance of two different pulse oximeter technologies by comparing the time taken to achieve reliable oxygen saturation readings during neonatal transition. METHODS This cross-sectional study was done to compare the performance of two pulse oximeter technologies - Signal Extraction Technology (SET), and Resistor Calibration (RCAL) technology on 150 inborn, term neonates at birth. Probes of both pulse oximeters were connected to the pre-ductal limb and the time taken to obtain a reliable reading was recorded. Sequential saturation values were recorded every minute till ten minutes of life. Statistical analysis was done with Mann-Whitney U test and intraclass correlation coefficient was calculated. RESULTS Pulse oximeter with SET recorded reliable readings faster than RCAL technology - Median (IQR) 32 (21-60)s vs. 45 (21.75-105)s, p = 0.021. There was a significant difference in the time to record first saturation readings of the two pulse oximeters when used in normal deliveries [RCAL vs. SET-Median (IQR) 50s (25-120.75) vs. 32.5s (21.75-58.25), p = 0.004] but no such difference was observed in Lower Segment Cesarean section (LSCS) [RCAL vs. SET Median (IQR) 35.5s (18.25-70.75) vs. 31s (20-69.75), p = 0.968]. Sequential saturation readings for every minute for the first 10 min of life were higher with SET vs. RCAL technology. The intraclass correlation coefficient between both pulse oximeters, for each minute, was poor (r < 0.80). CONCLUSIONS The SET pulse oximeter picked up first saturation values faster than the RCAL technology pulse oximeters. Studies are needed to evaluate effect of this on decisions made during neonatal resuscitation.
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Affiliation(s)
- Sunita Jeyapal
- Department of Pediatrics, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Pondicherry, 605014, India
| | - Peter Prasanth Kumar Kommu
- Department of Pediatrics, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Pondicherry, 605014, India
| | - M Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettykulam, Pondicherry, 605014, India
| | - Lalitha Krishnan
- Department of Pediatrics, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Pondicherry, 605014, India.
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Manikandan M, Senthamarai Kannan K, Venkatachalam, Singh Z, Kumar D. Allocation of security system for terrorist events using binomial distribution. Journal of Information and Optimization Sciences 2016. [DOI: 10.1080/02522667.2015.1112516] [Citation(s) in RCA: 2] [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: 10/20/2022]
Affiliation(s)
- M. Manikandan
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | | | - Venkatachalam
- Department of Preventive and Social Medicine, Jawaharlal Institute of Postgraduate Medical Education & Research, Pondicherry, India
| | - Zile Singh
- Department of Community Medicine, Pondicherry Institute of Medical Sciences, Puducherry, India
| | - Denesh Kumar
- Department of Community Medicine, Vellammal Medical College Hospital & Research Institute, Madurai, India
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Elsafadi M, Manikandan M, Dawud RA, Alajez NM, Hamam R, Alfayez M, Kassem M, Aldahmash A, Mahmood A. Transgelin is a TGFβ-inducible gene that regulates osteoblastic and adipogenic differentiation of human skeletal stem cells through actin cytoskeleston organization. Cell Death Dis 2016; 7:e2321. [PMID: 27490926 PMCID: PMC5108308 DOI: 10.1038/cddis.2016.196] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 04/08/2016] [Accepted: 05/30/2016] [Indexed: 12/11/2022]
Abstract
Regenerative medicine is a novel approach for treating conditions in which enhanced bone regeneration is required. We identified transgelin (TAGLN), a transforming growth factor beta (TGFβ)-inducible gene, as an upregulated gene during in vitro osteoblastic and adipocytic differentiation of human bone marrow-derived stromal (skeletal) stem cells (hMSC). siRNA-mediated gene silencing of TAGLN impaired lineage differentiation into osteoblasts and adipocytes but enhanced cell proliferation. Additional functional studies revealed that TAGLN deficiency impaired hMSC cell motility and in vitro transwell cell migration. On the other hand, TAGLN overexpression reduced hMSC cell proliferation, but enhanced cell migration, osteoblastic and adipocytic differentiation, and in vivo bone formation. In addition, deficiency or overexpression of TAGLN in hMSC was associated with significant changes in cellular and nuclear morphology and cytoplasmic organelle composition as demonstrated by high content imaging and transmission electron microscopy that revealed pronounced alterations in the distribution of the actin filament and changes in cytoskeletal organization. Molecular signature of TAGLN-deficient hMSC showed that several genes and genetic pathways associated with cell differentiation, including regulation of actin cytoskeleton and focal adhesion pathways, were downregulated. Our data demonstrate that TAGLN has a role in generating committed progenitor cells from undifferentiated hMSC by regulating cytoskeleton organization. Targeting TAGLN is a plausible approach to enrich for committed hMSC cells needed for regenerative medicine application.
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Affiliation(s)
- M Elsafadi
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia.,KMEB, Department of Endocrinology, University Hospital of Odense and University of Southern Denmark, Odense, Denmark
| | - M Manikandan
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
| | - R A Dawud
- Berlin-Brandenburg Center for Regenerative Therapies, Charité-Universitätsmedizin Berlin, Berlin, Germany.,Department of Comparative Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | - N M Alajez
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
| | - R Hamam
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
| | - M Alfayez
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
| | - M Kassem
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia.,KMEB, Department of Endocrinology, University Hospital of Odense and University of Southern Denmark, Odense, Denmark
| | - A Aldahmash
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia.,KMEB, Department of Endocrinology, University Hospital of Odense and University of Southern Denmark, Odense, Denmark.,Prince Naif Health Research Center, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
| | - A Mahmood
- Stem Cells Unit, Department of Anatomy, College of Medicine, King Saud University, Riyadh 11461, Kingdom of Saudi Arabia
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Deneshkumar V, Senthamarai Kannan K, Manikandan M. Designing of Neural Network Models for Agricultural Forecasting. Journal of Statistics and Management Systems 2015. [DOI: 10.1080/09720510.2015.1040237] [Citation(s) in RCA: 2] [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: 10/22/2022]
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Karthik G, Sundaravadivelu M, Rajkumar P, Manikandan M. Diaza-adamantane derivatives as corrosion inhibitor for copper in nitric acid medium. Res Chem Intermed 2014. [DOI: 10.1007/s11164-014-1846-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Manikandan M, Gopal J, Hasan N, Wu HF. A nano-patterned self assembled monolayer (SAM) rutile titania cancer chip for rapid, low cost, highly sensitive, direct cancer analysis in MALDI-MS. Talanta 2014; 130:78-89. [PMID: 25159382 DOI: 10.1016/j.talanta.2014.06.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 03/28/2014] [Revised: 06/14/2014] [Accepted: 06/17/2014] [Indexed: 11/30/2022]
Abstract
We developed a cancer chip by nano-patterning a highly sensitive SAM titanium surface capable of capturing and sensing concentrations as low as 10 cancer cells/mL from the environment by Matrix Assisted Laser Desorption and Ionization Time of Flight Mass Spectrometry (MALDI-TOF MS). The current approach evades any form of pretreatment and sample preparation processes; it is time saving and does not require the (expensive) conventional MALDI target plate. The home made aluminium (Al) target holder cost, on which we loaded the cancer chips for MALDI-TOF MS analysis, is about 60 USD. While the conventional stainless steel MALDI target plate is more than 700 USD. The SAM surface was an effective platform leading to on-chip direct MALDI-MS detection of cancer cells. We compared the functionality of this chip with the unmodified titanium surfaces and thermally oxidized (TO) titanium surfaces. The lowest detectable concentration of the TO chip was 10(3) cells/mL, while the lowest detectable concentration of the control or unmodified titanium chips was 10(6) cells/mL. Compared to the control surface, the SAM cancer chip showed 100,000 times of enhanced sensitivity and compared with the TO chip, 1000 times of increased sensitivity. The high sensitivity of the SAM surfaces is attributed to the presence of the rutile SAM, surface roughness and surface wettability as confirmed by AFM, XRD, contact angle microscope and FE-SEM. This study opens a new avenue for the potent application of the SAM cancer chip for direct cancer diagnosis by MALDI-TOF MS in the near future.
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Affiliation(s)
- M Manikandan
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan
| | - Judy Gopal
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan
| | - Nazim Hasan
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan
| | - Hui-Fen Wu
- Department of Chemistry, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan; Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan; Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung 70, Lien-Hai Road, Kaohsiung 80424, Taiwan; School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 800, Taiwan; Institute of Medical Science and Technology, National Sun Yat-Sen University, Lien-Hai Road, Kaohsiung 80424, Taiwan.
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Manikandan M, Nasser Abdelhamid H, Talib A, Wu HF. Facile synthesis of gold nanohexagons on graphene templates in Raman spectroscopy for biosensing cancer and cancer stem cells. Biosens Bioelectron 2014; 55:180-6. [DOI: 10.1016/j.bios.2013.11.037] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/08/2013] [Accepted: 11/11/2013] [Indexed: 02/07/2023]
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Hua PY, Manikandan M, Abdelhamid HN, Wu HF. Graphene nanoflakes as an efficient ionizing matrix for MALDI-MS based lipidomics of cancer cells and cancer stem cells. J Mater Chem B 2014; 2:7334-7343. [DOI: 10.1039/c4tb00970c] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [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
This study demonstrates that graphene nanoflakes can be efficiently used as a successful, interference free matrix for matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS).
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Affiliation(s)
- Pei-Yang Hua
- Department of Chemistry
- National Sun Yat Sen University
- Kaohsiung, Taiwan
| | - M. Manikandan
- Department of Chemistry
- National Sun Yat Sen University
- Kaohsiung, Taiwan
- Center for Nanoscience and Nanotechnology
- National Sun Yat-Sen University
| | - Hani Nasser Abdelhamid
- Department of Chemistry
- National Sun Yat Sen University
- Kaohsiung, Taiwan
- Department of Chemistry
- Assuit University
| | - Hui-Fen Wu
- Department of Chemistry
- National Sun Yat Sen University
- Kaohsiung, Taiwan
- School of Pharmacy
- College of Pharmacy
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Gopal J, Manikandan M, Wu HF. Low cost aluminium foil platforms for rapid mass spectrometric differentiation of the fungal pathogen Aspergillus niger mycelium and spores by in situ gold nanosphere accelerated microwave digestion. RSC Adv 2014. [DOI: 10.1039/c3ra46788k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Manikandan M, Hasan N, Wu HF. Platinum nanoparticles for the photothermal treatment of Neuro 2A cancer cells. Biomaterials 2013; 34:5833-42. [DOI: 10.1016/j.biomaterials.2013.03.077] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 03/23/2013] [Indexed: 01/28/2023]
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Gopal J, Hasan N, Manikandan M, Wu HF. Bacterial toxicity/compatibility of platinum nanospheres, nanocuboids and nanoflowers. Sci Rep 2013; 3:1260. [PMID: 23405274 PMCID: PMC3569627 DOI: 10.1038/srep01260] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Accepted: 11/20/2012] [Indexed: 11/19/2022] Open
Abstract
For the first time, we have investigated the bacterial toxicity or compatibility properties of Pt nanoparticles (NPs) with different sizes (P1, P2, P3, P4 and P5). The bacterio-toxic or compatible properties of these five different sized Pt NPs with the clinical pathogen, Pseudomonas aeruginosa were explored by many analytical methods such as the conventional plate count method, matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS), fluorescence microscopy and fluorescence sensoring techniques. The results revealed that the 1-3 nm sized (P1 and P2) Pt NPs showed bacterio-toxic properties while the 4-21 nm (P3, P4 and P5) Pt NPs exhibited bacterio-compatible properties. This is the first study which reports the bacterial toxicity of Pt NPs. The information released from this study is significantly important to future clinical, medical, biological and biomedical applications of Pt NPs.
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Affiliation(s)
- Judy Gopal
- Department of Chemistry, National Sun Yat - Sen University, Kaohsiung, 70, Lien-Hai Road, 80424, Taiwan
- Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 800, Taiwan
| | - Nazim Hasan
- Department of Chemistry, National Sun Yat - Sen University, Kaohsiung, 70, Lien-Hai Road, 80424, Taiwan
| | - M. Manikandan
- Department of Chemistry, National Sun Yat - Sen University, Kaohsiung, 70, Lien-Hai Road, 80424, Taiwan
- Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 800, Taiwan
| | - Hui-Fen Wu
- Department of Chemistry, National Sun Yat - Sen University, Kaohsiung, 70, Lien-Hai Road, 80424, Taiwan
- Center for Nanoscience and Nanotechnology, National Sun Yat-Sen University, Kaohsiung, 800, Taiwan
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat - Sen University, Kaohsiung, 800, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung, 800, Taiwan
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Manikandan M, Wu HF. Rapid differentiation and quantification of live/dead cancer cells using differential photochemical behavior of acridine orange. Photochem Photobiol Sci 2013; 12:1921-6. [DOI: 10.1039/c3pp50165e] [Citation(s) in RCA: 6] [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: 11/21/2022]
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Gopal J, Manikandan M, Hasan N, Lee CH, Wu HF. A comparative study on the mode of interaction of different nanoparticles during MALDI-MS of bacterial cells. J Mass Spectrom 2013; 48:119-127. [PMID: 23303755 DOI: 10.1002/jms.3135] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Accepted: 10/26/2012] [Indexed: 06/01/2023]
Abstract
We propose the benefits of preincubation during nanoparticle-assisted bacterial analysis, where the bacteria are grown along with the nanoparticles. We were able to obtain a two to ten fold enhancement of bacterial signals in 3 h compared to the generally used methodology followed in previous literature. The previous literature method required a long time (18 h) to obtain such an enhancement. We probe the interactions of two bacteria, Staphylococcus aureus and Pseudomonas aeruginosa, with Ag, NiO, Pt TiO(2) and ZnO nanoparticles via transmission electron microscopy, ultraviolet spectroscopy and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS). Based on these results, we propose a mechanism for interaction of these five nanoparticles with bacteria. Two mechanisms were observed for the interactions: (1) Mechanism A is proposed for the Pt and NiO NPs which functioned based on affinity for bacterial cells. (2) Mechanism B was proposed for the bactericidal NPs such as TiO(2), ZnO and Ag NPs. The results indicate that the success of the unmodified NPs in MALDI-MS bacterial studies lies in following the ideal protocol for incubation at the ideal concentrations.
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Affiliation(s)
- Judy Gopal
- Department of Chemistry, National Sun Yat - Sen University, Kaohsiung, 70, Lien-Hai Road, 80424, Taiwan
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Gopukumar N, Manikandan M, Arivarignan G. Roosting patterns in a captive colony of short-nosed fruit bat Cynopterus sphinx (Vahl). Indian J Exp Biol 2002; 40:1187-90. [PMID: 12693703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Development of roosting patterns under a limited resource was studied in the short-nosed fruit bat C. sphinx in captivity. Spatial fidelity during the resting period (day time) and the individual male bat's presence/absence in the roost (occupancy index) were estimated during the active period (night time). Results show the presence of three groups on the basis of spatial fidelity. The first group was associated with the tent consisting of a harem male and seven females. The second group stayed near to the harem. The third group consisting of two males showed little occupancy index and no spatial fidelity. Female turnover between the first and second groups, and harem male replacement were observed. These findings of male groupings and female loyalty on the basis of "resource", suggest that resource defence polygyny is the primary mating strategy in C. sphinx.
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Affiliation(s)
- N Gopukumar
- Department of Animal Behaviour and Physiology, School of Biological Sciences, Madurai Kamaraj University, Madurai 625 021, India.
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