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Gopi D, Murugan N, Ramya S, Kavitha L. Retraction: Electrodeposition of a porous strontium-substituted hydroxyapatite/zinc oxide duplex layer on AZ91 magnesium alloy for orthopedic applications. J Mater Chem B 2023; 11:3262. [PMID: 36974896 DOI: 10.1039/d3tb90058d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
Retraction of 'Electrodeposition of a porous strontium-substituted hydroxyapatite/zinc oxide duplex layer on AZ91 magnesium alloy for orthopedic applications' by D. Gopi et al., J. Mater. Chem. B, 2014, 2, 5531-5540, https://doi.org/10.1039/C4TB00960F.
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Affiliation(s)
- D Gopi
- Department of Chemistry, Periyar University, Salem 636 011, Tamilnadu, India.
- Centre for Nanoscience and Nanotechnology, Periyar University, Salem 636 011, Tamilnadu, India
| | - N Murugan
- Department of Chemistry, Periyar University, Salem 636 011, Tamilnadu, India.
| | - S Ramya
- Department of Chemistry, Periyar University, Salem 636 011, Tamilnadu, India.
| | - L Kavitha
- Department of Physics, School of Basic and Applied Sciences, Central University of Tamilnadu, Thiruvarur-610 101, Tamilnadu, India
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Gopi D, Murugan N, Ramya S, Shinyjoy E, Kavitha L. Retraction: Ball flower like manganese, strontium substituted hydroxyapatite/cerium oxide dual coatings on the AZ91 Mg alloy with improved bioactive and corrosion resistance properties for implant applications. RSC Adv 2023; 13:10016. [PMID: 37011254 PMCID: PMC10053096 DOI: 10.1039/d3ra90029k] [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] [Received: 03/23/2023] [Accepted: 03/23/2023] [Indexed: 03/31/2023] Open
Abstract
Retraction of ‘Ball flower like manganese, strontium substituted hydroxyapatite/cerium oxide dual coatings on the AZ91 Mg alloy with improved bioactive and corrosion resistance properties for implant applications' by D. Gopi et al., RSC Adv., 2015, 5, 27402–27411, DOI: https://doi.org/10.1039/C5RA03432A.
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Affiliation(s)
- D. Gopi
- Department of Chemistry, Periyar UniversitySalem 636 011TamilnaduIndia+91 427 2345124+91 427 2345766
- Centre for Nanoscience and Nanotechnology, Periyar UniversitySalem 636 011TaminaduIndia
| | - N. Murugan
- Department of Chemistry, Periyar UniversitySalem 636 011TamilnaduIndia+91 427 2345124+91 427 2345766
| | - S. Ramya
- Department of Chemistry, Periyar UniversitySalem 636 011TamilnaduIndia+91 427 2345124+91 427 2345766
| | - E. Shinyjoy
- Department of Chemistry, Periyar UniversitySalem 636 011TamilnaduIndia+91 427 2345124+91 427 2345766
| | - L. Kavitha
- Department of Physics, School of Basic and Applied Sciences, Central University of TamilnaduThiruvarur 610 101TamilnaduIndia
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Murugan N, Kavitha L, Shinyjoy E, Rajeswari D, Vimala K, Kannan S, Gopi D. Retraction: Smart rose flower like bioceramic/metal oxide dual layer coating with enhanced anti-bacterial, anti-cancer, anti-corrosive and biocompatible properties for improved orthopedic applications. RSC Adv 2023; 13:9838. [PMID: 37000181 PMCID: PMC10043639 DOI: 10.1039/d3ra90026f] [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] [Received: 03/22/2023] [Accepted: 03/22/2023] [Indexed: 03/30/2023] Open
Abstract
Retraction of ‘Smart rose flower like bioceramic/metal oxide dual layer coating with enhanced anti-bacterial, anti-cancer, anti-corrosive and biocompatible properties for improved orthopedic applications’ by N. Murugan et al., RSC Adv., 2015, 5, 85831–85844, https://doi.org/10.1039/C5RA17747B.
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Affiliation(s)
- N. Murugan
- Department of Chemistry, Periyar UniversitySalem 636011TamilnaduIndia+91 427 2345124+91 427 2345766
| | - L. Kavitha
- Department of Physics, School of Basic and Applied Sciences, Central University of TamilnaduThiruvarur 610 101TamilnaduIndia
| | - E. Shinyjoy
- Department of Chemistry, Periyar UniversitySalem 636011TamilnaduIndia+91 427 2345124+91 427 2345766
| | - D. Rajeswari
- Department of Physics, Periyar UniversitySalem 636 011TamilnaduIndia
| | - K. Vimala
- Proteomics and Molecular Cell Physiology Laboratory, Department of Zoology, Periyar UniversitySalem 636011TamilnaduIndia
| | - S. Kannan
- Proteomics and Molecular Cell Physiology Laboratory, Department of Zoology, Periyar UniversitySalem 636011TamilnaduIndia
| | - D. Gopi
- Department of Chemistry, Periyar UniversitySalem 636011TamilnaduIndia+91 427 2345124+91 427 2345766
- Centre for Nanoscience and Nanotechnology, Periyar UniversitySalem 636011TamilnaduIndia
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Thamizhlarasan A, Murugan N, Liu YC, Anbarasan R, Tung KL. Effect of amine and acid functionalization on polyimide: A structure-property relationship study. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Murugan N, Sagong C, Cuamatzi Castelan AS, Moss K, Roth T, Drake CL, Cheng P. 0203 To and From the Night Shift: Risky On-the-Road Driving in Night Shift Workers. Sleep 2020. [DOI: 10.1093/sleep/zsaa056.201] [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: 11/14/2022] Open
Abstract
Abstract
Introduction
Drowsy driving is a common occupational hazard for night shift workers (NSWs). While sleep loss is commonly identified as the primary culprit of drowsy driving, another critical factor to consider is circadian phase. However, the role of circadian phase in driving safety has not been well characterized in NSWs. This study examined if dim light melatonin offset (DLMOff, i.e. the cessation of melatonin secretion) is also a relevant phase marker of susceptibility to four different subtypes of risky on-the-road driving behaviors.
Methods
On-the-road driving was monitored over 8 weeks via a mobile application that tracked risky driving behaviors using accelerometer and GPS data from cell phones (N=15; 3052 total driving events recorded). Risky driving behaviors included: 1) frequency of hard-braking events, 2) frequency of aggressive-acceleration events, 3) duration of excessive-speeding, and 4) duration of phone-usage. At week 2, participants spent 24 hours in-lab where hourly saliva samples were collected and assayed for melatonin, and DLMOff was calculated. Phase angle of driving events relative to DLMOff was used as the predictor in nested mixed-effects regressions, with risky driving behaviors as the outcome variables.
Results
The most common occurrences of risky driving were phone-usage and hard-braking. On average, NSWs had 46.7% and 42.0% of driving events with at least one occurrence of phone-usage and hard-braking, respectively. Rates of aggressive-acceleration and speeding were 24.4% and 20.4%. Positive phase angles (i.e. driving after DLMOff) were associated with reduced rates of hard-braking and aggressive-acceleration, but not of phone-usage and excessive-speeding. Specifically, rates of hard-braking and aggressive-acceleration decreased by 4.5% (p<.01) and 3.4% (p=.05) every two hours following DLMOff, respectively.
Conclusion
The study suggests DLMOff appears to be an important variable for predicting accident risk in NSWs. If replicated, circadian phase should be considered in recommendations to increase occupational health and safety of NSWs.
Support
Support for this study was provided to PC by NHLBI (K23HL138166).
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Affiliation(s)
- N Murugan
- Henry Ford Health System, Detroit, MI
| | - C Sagong
- Henry Ford Health System, Detroit, MI
| | | | - K Moss
- Henry Ford Health System, Detroit, MI
| | - T Roth
- Henry Ford Health System, Detroit, MI
| | - C L Drake
- Henry Ford Health System, Detroit, MI
| | - P Cheng
- Henry Ford Health System, Detroit, MI
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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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Jeevanandham G, Jerome R, Murugan N, Preethika M, Vediappan K, Sundramoorthy AK. Nickel oxide decorated MoS2nanosheet-based non-enzymatic sensor for the selective detection of glucose. RSC Adv 2020; 10:643-654. [PMID: 35494450 PMCID: PMC9047534 DOI: 10.1039/c9ra09318d] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [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: 11/09/2019] [Accepted: 12/11/2019] [Indexed: 11/23/2022] Open
Abstract
Understanding blood glucose levels in our body can be a key part in identifying and diagnosing prediabetes. Herein, nickel oxide (NiO) decorated molybdenum disulfide (MoS2) nanosheets have been synthesized via a hydrothermal process to develop a non-enzymatic sensor for the detection of glucose. The surface morphology of the NiO/MoS2 nanocomposite was comprehensively investigated by field-emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), powder X-ray diffraction (PXRD), X-ray photoelectron spectroscopy (XPS) and Brunauer–Emmett–Teller (BET) analysis. The electro-catalytic activity of the as-prepared NiO/MoS2 nanocomposite towards glucose oxidation was investigated by cyclic voltammetry, electrochemical impedance spectroscopy (EIS) and amperometry in 0.1 M NaOH. The NiO/MoS2 nanocomposite-based sensor showed outstanding electrocatalytic activity for the direct electro-oxidation of glucose due to it having more catalytic active sites, good conductivity, excellent electron transport and high specific surface area. Meanwhile, the NiO/MoS2 modified glassy carbon electrode (GCE) showed a linear range of glucose detection from 0.01 to 10 mM by amperometry at 0.55 V. The effect of other common interferent molecules on the electrode response was also tested using alanine, l-cysteine, fructose, hydrogen peroxide, lactose, uric acid, dopamine and ascorbic acid. These molecules did not interfere in the detection of glucose. Moreover, this NiO/MoS2/GCE sensor offered rapid response (2 s) and a wide linear range with a detection limit of 1.62 μM for glucose. The reproducibility, repeatability and stability of the sensor were also evaluated. The real application of the sensor was tested in a blood serum sample in the absence and presence of spiked glucose and its recovery values (96.1 to 99.8%) indicated that this method can be successfully applied to detect glucose in real samples. This study reported that NiO/MoS2 based nanocomposite can be used as an electrocatalytic material to detect glucose with high selectivity in a blood serum.![]()
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Affiliation(s)
| | - R. Jerome
- Department of Chemistry
- SRM Institute of Science and Technology
- India
| | - N. Murugan
- Department of Chemistry
- SRM Institute of Science and Technology
- India
| | - M. Preethika
- Department of Chemistry
- SRM Institute of Science and Technology
- India
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Murugan N, Kumar THV, Devi NR, Sundramoorthy AK. A flower-structured MoS2-decorated f-MWCNTs/ZnO hybrid nanocomposite-modified sensor for the selective electrochemical detection of vitamin C. NEW J CHEM 2019. [DOI: 10.1039/c9nj02993a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized an MoS2/f-MWCNTs/ZnO composite and successfully used it to prepare an electrochemical sensor for the selective detection of AA in blood serum samples.
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Affiliation(s)
- N. Murugan
- Department of Chemistry
- SRM Institute of Science and Technology
- India
| | | | - N. Ramila Devi
- Department of Chemistry
- SRM Institute of Science and Technology
- India
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Murugan N, Sundramoorthy AK. Green synthesis of fluorescent carbon dots from Borassus flabellifer flowers for label-free highly selective and sensitive detection of Fe3+ ions. NEW J CHEM 2018. [DOI: 10.1039/c8nj01894d] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Fluorescent carbon dots were derived from Borassus flabellifer flowers by thermal pyrolysis method and used for label-free highly selective and sensitive detection of Fe3+ ions.
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Affiliation(s)
- N. Murugan
- Department of Chemistry
- SRM Institute of Science and Technology
- Kattankulathur-603 203
- India
- SRM Research Institute
| | - Ashok K. Sundramoorthy
- Department of Chemistry
- SRM Institute of Science and Technology
- Kattankulathur-603 203
- India
- SRM Research Institute
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Murugan N, Manoharan P, Nando GB. Thermodynamic Compatibility, Crystallizability, Thermal, Mechanical Properties and Oil Resistance Characteristics of Nanostructure Poly (ethylene-co-methyl acrylate)/Poly(acrylonitrile-co-butadiene) Blends. OPEN CHEM 2017. [DOI: 10.1515/chem-2017-0047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThis paper addresses the compatibility, morphological characteristics, crystallization, physico-mechanical properties and thermal stability of the melt mixed EMA/NBR blends. FTIR spectroscopy reveals considerable physical interaction between the polymers that explain the compatibility of the blends. DSC results confirm the same (compatibility) and reveals that NBR hinders EMA crystallization. Mechanical and thermal properties of the prepared EMA/NBR blends notably enhance with increasing the fraction of EMA in the blends. Morphology study exhibit the dispersed particles in spherical shape in the nanometer level. Swelling and oil resistance study have also been carried out in details to understand the performance behaviour of these blends at service condition
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Affiliation(s)
- N. Murugan
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur721302, India
- V.S.V.N.Polytechnic College, Department of Plastic Technology, Virudhunagar626001, Tamilnadu, India
| | - Partheban Manoharan
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur721302, India
| | - Golok B. Nando
- Rubber Technology Centre, Indian Institute of Technology, Kharagpur721302, India
- V.S.V.N.Polytechnic College, Department of Plastic Technology, Virudhunagar626001, Tamilnadu, India
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Newtonraj A, Murugan N, Singh Z, Chauhan RC, Velavan A, Mani M. Factors Associated with Physical Inactivity among Adult Urban Population of Puducherry, India: A Population Based Cross-sectional Study. J Clin Diagn Res 2017; 11:LC15-LC17. [PMID: 28658812 DOI: 10.7860/jcdr/2017/24028.9853] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 09/08/2016] [Accepted: 02/01/2017] [Indexed: 11/24/2022]
Abstract
INTRODUCTION Physical inactivity is the fourth leading cause of death worldwide. Increase in physical activity decreases the incidence of cardiovascular diseases, Type 2 diabetes, stroke, and improves psychological wellbeing. AIM To study the level of physical inactivity among the adult population in an urban area of Puducherry in India and its associated risk factors. MATERIALS AND METHODS This cross-sectional study was conducted among 569 adult participants from an urban area of Pondicherry. The level of physical inactivity was measured by using WHO standard Global Physical Activity Questionnaire (GPAQ). RESULTS Overall prevalence of physical inactivity in our study was 49.7% (CI: 45.6-53.8). Among the physically active people, contribution of physical activity by work was 77.4%, leisure time activities were 11.6% and transport time was 11%. Both men and women were equally inactive {Physically inactive among women was 50% (CI:44.1-55.9)} and {Physically inactive among men was 49.5% (CI:43.8-55.2)}. Prevalence of physical inactivity was increasing with increasing age. Non tobacco users were two times more active than tobacco users {Adjusted Odds Ratio: 2.183 (1.175- 4.057)}. Employed were more active as compared to retired {Adjusted Odds Ratio: 0.412 (0.171-0.991)}, students {Adjusted Odds Ratio: 0.456 (0.196-1.060)}, house wives {Adjusted Odds Ratio: 0.757 (0.509-1.127)} and unemployed {Adjusted Odds Ratio: 0.538 (0.271-1.068)}. Non alcoholics were only 0.34 times as active as alcoholics. CONCLUSION Level of physical activity was found to be insufficient among adult urban population of Puducherry. Working adult population found to be active, that too due to their work pattern. There is a need to promote leisure time and travelling time physical activity.
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Affiliation(s)
- Ariarathinam Newtonraj
- Assistant Professor, Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Puducherry, India
| | - Natesan Murugan
- Associate Professor, Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Puducherry, India
| | - Zile Singh
- Assistant Professor, Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Puducherry, India
| | - Ramesh Chand Chauhan
- Assistant Professor, Department of Community Medicine, All India Institute of Medical Sciences, Bhubaneswar, Odisha, India
| | - Anandan Velavan
- Assistant Professor, Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Puducherry, India
| | - Manikandan Mani
- Assistant Professor, Department of Community Medicine, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Puducherry, India
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Pavithra Bharathi V, Ragavendran C, Murugan N, Natarajan D. Ipomoea batatas (Convolvulaceae)-mediated synthesis of silver nanoparticles for controlling mosquito vectors of Aedes albopictus, Anopheles stephensi, and Culex quinquefasciatus (Diptera:Culicidae). Artif Cells Nanomed Biotechnol 2016; 45:1568-1580. [PMID: 27929364 DOI: 10.1080/21691401.2016.1261873] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We proposed an effective and eco-friendly control of dengue, malaria, and filariasis-causing vectors. We tested Ipomoea batatas leaves-mediated silver nanoparticles (AgNPs) against first to fourth instar larvae and adults of Aedes albopictus, Anopheles stephensi, and Culex quinquefasciatus at different concentrations. The synthesized AgNPs showed broad spectrum of larvicidal and adulticidal effects after 48 h of exposure. The characterization of synthesized AgNPs was done using various spectral and microscopy analyses. The maximum efficacy was observed in synthesized AgNPs against the adult of Ae. albopictus with the LC50 and LC90 values were 10.069 and 15.657 μg/mL, respectively, followed by others.
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Affiliation(s)
- V Pavithra Bharathi
- a Department of Biotechnology, School of Biosciences, Natural Drug Research Laboratory , Periyar University , Salem , India
| | - C Ragavendran
- a Department of Biotechnology, School of Biosciences, Natural Drug Research Laboratory , Periyar University , Salem , India
| | - N Murugan
- a Department of Biotechnology, School of Biosciences, Natural Drug Research Laboratory , Periyar University , Salem , India
| | - D Natarajan
- a Department of Biotechnology, School of Biosciences, Natural Drug Research Laboratory , Periyar University , Salem , India
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Padmapriya S, Murugan N, Ragavendran C, Thangabalu R, Natarajan D. Phytoremediation potential of some agricultural plants on heavy metal contaminated mine waste soils, salem district, tamilnadu. Int J Phytoremediation 2016; 18:288-294. [PMID: 26366709 DOI: 10.1080/15226514.2015.1085832] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Pot culture experiment performed for phytoextraction potential of selected agricultural plants [millet (Eleusine coracana), mustard (Brassica juncea), jowar (Sorghum bicolor), black gram (Vigna mungo), pumpkin (Telfairia occidentalis)] grown in metal contaminated soils around the Salem region, Tamilnadu, India. Physiochemical characterization of soils, reported as low to medium level of N, P, K was found in test soils. The Cr content higher in mine soils than control and the values are 0.176 mg/L in Dalmia soil and 0.049 mg/L in Burn & Co soil. The germination rate low in mine soil than control soils (25 to 85%). The content of chlorophyll, carotenoid, carbohydrate and protein decreased in mine soils than control. The morphological parameters and biomass values decreased in experimental plants due to metal accumulation. Proline content increased in test plants and ranged from 0.113 mg g(-1) to 0.858 mg g(-1) which indicate the stress condition due to toxicity of metals. Sorghum and black gram plants reported as metal tolerant capacity. Among the plants, Sorghum produced good results (both biomass and biochemical parameters) which equal to control plant and suggests Sorghum plant is an ideal for remediation of metal contaminated soils.
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Affiliation(s)
- S Padmapriya
- a Natural Drug Research Laboratory, Department of Biotechnology Periyar University , Periyar Palkalai Nagar , Salem , Tamilnadu , India
| | - N Murugan
- a Natural Drug Research Laboratory, Department of Biotechnology Periyar University , Periyar Palkalai Nagar , Salem , Tamilnadu , India
| | - C Ragavendran
- a Natural Drug Research Laboratory, Department of Biotechnology Periyar University , Periyar Palkalai Nagar , Salem , Tamilnadu , India
| | - R Thangabalu
- a Natural Drug Research Laboratory, Department of Biotechnology Periyar University , Periyar Palkalai Nagar , Salem , Tamilnadu , India
| | - D Natarajan
- a Natural Drug Research Laboratory, Department of Biotechnology Periyar University , Periyar Palkalai Nagar , Salem , Tamilnadu , India
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Geetha T, Ramamoorthy K, Murugan N. Impact of foliar application of micronutrients on some biochemical parameters of mulberry ( Morus albaL.). Appl Biol Res 2015. [DOI: 10.5958/0974-4517.2015.00011.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gopi D, Murugan N, Ramya S, Shinyjoy E, Kavitha L. Ball flower like manganese, strontium substituted hydroxyapatite/cerium oxide dual coatings on the AZ91 Mg alloy with improved bioactive and corrosion resistance properties for implant applications. RSC Adv 2015. [DOI: 10.1039/c5ra03432a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Mn, Sr-HAP/CeO2dual layer coated AZ91 Mg alloy will be a revolutionary potential material for orthopedic implants.
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Affiliation(s)
- D. Gopi
- Department of Chemistry
- Periyar University
- Salem 636 011
- India
- Centre for Nanoscience and Nanotechnology
| | - N. Murugan
- Department of Chemistry
- Periyar University
- Salem 636 011
- India
| | - S. Ramya
- Department of Chemistry
- Periyar University
- Salem 636 011
- India
| | - E. Shinyjoy
- Department of Chemistry
- Periyar University
- Salem 636 011
- India
| | - L. Kavitha
- Department of Physics
- School of Basic and Applied Sciences
- Central University of Tamilnadu
- Thiruvarur 610 101
- India
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Murugan N, Kavitha L, Shinyjoy E, Rajeswari D, Vimala K, Kannan S, Gopi D. Smart rose flower like bioceramic/metal oxide dual layer coating with enhanced anti-bacterial, anti-cancer, anti-corrosive and biocompatible properties for improved orthopedic applications. RSC Adv 2015. [DOI: 10.1039/c5ra17747b] [Citation(s) in RCA: 12] [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] [Indexed: 11/21/2022] Open
Abstract
The flower like Se,Mn-HAP/ZrO2 dual layer coating on AZ91 magnesium alloy satisfies the requirements in bone cancer treatment and signifies progress in the field of implant materials.
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Affiliation(s)
- N. Murugan
- Department of Chemistry
- Periyar University
- Salem 636011
- India
| | - L. Kavitha
- Department of Physics
- School of Basic and Applied Sciences
- Central University of Tamilnadu
- Thiruvarur 610 101
- India
| | - E. Shinyjoy
- Department of Chemistry
- Periyar University
- Salem 636011
- India
| | - D. Rajeswari
- Department of Physics
- Periyar University
- Salem 636 011
- India
| | - K. Vimala
- Proteomics and Molecular Cell Physiology Laboratory
- Department of Zoology
- Periyar University
- Salem 636011
- India
| | - S. Kannan
- Proteomics and Molecular Cell Physiology Laboratory
- Department of Zoology
- Periyar University
- Salem 636011
- India
| | - D. Gopi
- Department of Chemistry
- Periyar University
- Salem 636011
- India
- Centre for Nanoscience and Nanotechnology
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Gopi D, Murugan N, Ramya S, Kavitha L. Electrodeposition of a porous strontium-substituted hydroxyapatite/zinc oxide duplex layer on AZ91 magnesium alloy for orthopedic applications. J Mater Chem B 2014; 2:5531-5540. [PMID: 32262186 DOI: 10.1039/c4tb00960f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [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
Magnesium alloy is a potential biomedical implant because of its outstanding biodegradability and mechanical properties. But the poor corrosion resistance of AZ91 magnesium alloy in physiological solution limits its biomedical applications. In order to improve the corrosion resistance and biological performance of AZ91 magnesium alloy, we have fabricated a strontium-substituted porous hydroxyapatite (Sr-HAP)/zinc oxide (ZnO) duplex layer on AZ91 magnesium alloy by electrodeposition. The porous Sr-HAP/ZnO duplex-layer coating on AZ91 magnesium alloy was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, high-resolution scanning electron microscopy and energy dispersive X-ray analysis. Also, the mechanical properties of the duplex-layer coating were evaluated using adhesion and Vickers micro-hardness tests. The effects of the duplex-layer coating on the corrosion behavior of AZ91 magnesium alloy were also investigated in simulated body fluid using electrochemical studies. The potentiodynamic polarization and electrochemical impedance spectroscopy results indicated that the corrosion resistance of AZ91 magnesium alloy was significantly improved by the duplex-layer coating. The in vitro cell-material interaction of the duplex-layer coating was observed with human osteosarcoma MG63 cells for cell viability at 1, 4 and 7 days of incubation and the coating exhibited good biocompatibility. Hence, from the obtained results we believe that the duplex-layer made of ZnO together with porous Sr-HAP on AZ91 magnesium alloy could provide effective corrosion protection and enhanced bioactivity. Thus, duplex-layer-coated AZ91 magnesium alloy can serve as a promising candidate for orthopedic applications.
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Affiliation(s)
- D Gopi
- Department of Chemistry, Periyar University, Salem 636 011, Tamilnadu, India.
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Murugan N, Dickens C, Pisa P, McCormack V, Joffe M, Jacobson J, Cubasch H. Down-staging of breast cancer in the pre-screening era: Experiences from Chris Hani Baragwanath Academic Hospital, Soweto, South Africa. S Afr Med J 2014; 104:380. [PMID: 25295329 PMCID: PMC7580286 DOI: 10.7196/samj.8243] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
We aimed to investigate the stage of breast cancer at first diagnosis and assess possible determinants of late-stage presentation. A consecutive series of women with newly diagnosed breast cancer at Chris Hani Baragwanath Academic Hospital (CHBAH), Soweto, South Africa were analysed. We retrospectively reviewed electronic patient records. Data were extracted for: (i ) stage and year at diagnosis; (ii ) travel distance (estimated straight-line distance from GPS-coded residential address to CHBAH); (iii ) receptor subtypes; and (iv ) age of patient. Generalised linear models were applied to estimate risk ratios for late- v. early-stage disease. Of the patients (N =1 071) studied, the mean age was 55 years and 90% were black Africans. Patients who lived >20 km from the hospital (n =347; 61.8%) presented with late-stage disease (stage 3/4) compared with 50.2% who lived ≤20 km from the hospital (n =724; p =0.02). The majority of patients (74%) >70 years of age who lived >20 km away presented with advanced breast cancer. However, in younger patients, age showed no clear association with stage at presentation. Travel distance was an important predictor of later-stage disease at diagnosis, which was more noticeable in elderly patients. Patients with more aggressive triple-negative and HER2+ tumours presented with later-stage disease.
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Affiliation(s)
- N Murugan
- Breast Unit, Department of Surgery, Chris Hani Baragwanath Academic Hospital, Soweto, South Africa
| | - C Dickens
- Section of Environment and Radiation, International Agency for Research on Cancer, Lyon, France
| | - P Pisa
- MRC/Wits Developmental Pathways for Health Research Unit, Department of Paediatrics, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - V McCormack
- Section of Environment and Radiation, International Agency for Research on Cancer, Lyon, France
| | - M Joffe
- Breast Unit, Department of Surgery, Chris Hani Baragwanath Academic Hospital, Soweto, South Africa
| | - J Jacobson
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, USA
| | - H Cubasch
- Breast Unit, Department of Surgery, Chris Hani Baragwanath Academic Hospital, Soweto, South Africa
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Perumal AV, Murugan N, Kumar GM. A discrete PSO approach for generating an integrated multi-plant aggregate production-distribution plan. KES 2013. [DOI: 10.3233/kes-130250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
| | - N. Murugan
- Coimbatore Institute of Technology, Coimbatore, India
| | - G. Mohan Kumar
- Park College of Engineering and Technology, Coimbatore, India
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Jayahar Bharathi M, Murugan N, Ramesh Kumar G, Ramakrishnan R, Anitha V, Ramesh S. Vittaforma corneae keratitis in southern India: role of a novel duplex PCR. J Med Microbiol 2013; 62:553-559. [PMID: 23319308 DOI: 10.1099/jmm.0.051722-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Microsporidia are obligate intracellular parasites that infect eukaryotic cells and have emerged as major opportunistic human pathogens. Due to the difficulties in definitive laboratory diagnosis and insufficient knowledge, ocular microsporidiosis is infrequently reported in India. To improve diagnostic facilities, we have developed a novel duplex PCR (dPCR) for the simultaneous identification of both genera and species of isolates with microsporidian aetiology that cause keratitis. The material scraped from the corneas of 12 clinically diagnosed microsporidial keratitis patients was subjected to routine microbiological examinations and molecular diagnosis using a novel dPCR that targeted the small-subunit rRNA gene (SSU-rRNA) of microsporidia and Vittaforma corneae using genus- and species-specific primers. Of the 12 corneal scrapes, 6 showed positive results in smears, while dPCR provided positive amplification with both pan-microsporidial and V. corneae species-specific primers for 9 corneal scrapes. The results were validated by sequencing and blast analysis. The sensitivity of this novel dPCR method was higher than that of conventional microscopy in the diagnosis of corneal microsporidial infection. dPCR with specific primers is potentially more sensitive, specific and depends less on more complicated methods for exact identification of the aetiology of microsporidial keratitis.
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Affiliation(s)
- M Jayahar Bharathi
- Department of Microbiology and Molecular Biology, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu 627 001, India
| | - N Murugan
- Department of Microbiology and Molecular Biology, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu 627 001, India
| | - G Ramesh Kumar
- Department of Microbiology and Molecular Biology, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu 627 001, India
| | - R Ramakrishnan
- Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu 627 001, India
| | - V Anitha
- Department of Cornea and External Eye Diseases, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu 627 001, India
| | - S Ramesh
- Postgraduate Department of Microbiology, Sri Paramakalyani College, Alwarkuruchi, Tirunelveli, Tamil Nadu 627412, India
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Varthanan PA, Murugan N, Kumar GM. A simulation based heuristic discrete particle swarm algorithm for generating integrated production–distribution plan. Appl Soft Comput 2012. [DOI: 10.1016/j.asoc.2012.05.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Purty AJ, Singh Z, Kisku KH, Bazroy J, Murugan N, Cherian J, Senthilvel A, Govindarajan S. P1-296 Case-finding and treatment of TB patients in medical colleges in pondicherry, S. India: patient and health system delays under the revised national TB control programme (RNTCP). Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976e.88] [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: 11/03/2022]
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Purty AJ, Mahajan P, Singh Z, Meenakshi A, Murugan N, Cherian J, Senthilvel A, Gurumurthy D. P2-537 Tracking progress towards elimination of iodine deficiency disorders in Puducherry (India), a school based study. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976m.64] [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]
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Jayahar Bharathi M, Ramakrishnan R, Ramesh S, Murugan N. Extended-spectrum beta-lactamase-mediated resistance among bacterial isolates recovered from ocular infections. Ophthalmic Res 2011; 47:52-6. [PMID: 21720185 DOI: 10.1159/000322807] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 11/12/2010] [Indexed: 11/19/2022]
Abstract
PURPOSE To evaluate resistances mediated by extended-spectrum β-lactamases (ESBLs) and AmpC β-lactamases among Gram-negative bacteria recovered from ocular infections. METHODS As per the Clinical Laboratory Standards Institute M100-S-16 document, a total of 135 Gram-negative bacilli were recovered from ocular specimens and were subjected to phenotypic confirmation for ESBL production by the double-disc synergy test, cephalosporin and clavulanate combination disc test and E test, and, for AmpC β-lactamase, the modified double-disc approximation method and AmpC disc test. RESULTS In the double-disc synergy test, 21 (15.5%) isolates showed positive results against the cefpodoxime disc, 19 (14%) against cefpodoxime and cefotaxime, 15 (11%) against cefpodoxime, cefotaxime and ceftriaxone and 10 (7%) isolates were against cefpodoxime, cefotaxime, ceftriaxone and ceftazidime discs. In the cephalosporin/clavulanate combination disc test, 19 (14%) isolates showed positive results against cefotaxime with clavulanic acid and 10 (7%) isolates against ceftazidime with clavulanic acid. In the E test, 10 (7%) isolates displayed positive results against ceftazidime and 19 (14%) against cefotaxime. In the AmpC disc test for phenotypic confirmation, indentations were observed in 15 (11%) isolates with flattening also occurring in 10 (7%) isolates. CONCLUSION The incidences of ESBL- and AmpC β-lactamase-mediated resistances are found to be 7 and 18.5% among ocular isolates, respectively, and are more prevalent among the strains of Escherichia coli and Klebsiella pneumoniae.
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Affiliation(s)
- M Jayahar Bharathi
- Department of Microbiology and Molecular Biology, Aravind Eye Hospital and Postgraduate Institute of Ophthalmology, Tirunelveli, Tamil Nadu, India.
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Mani TP, Murugan N, Rajendran C. Classical approach to contemporary TQM: An integrated conceptual TQM model as perceived in Tamil classical literature. Total Quality Management & Business Excellence 2010. [DOI: 10.1080/1478336032000053618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mani TP, Murugan N, Rajendran C. TQM is a must for success, but not sufficient for survival: A conceptual framework as contemplated in ancient Tamil literature in India. Total Quality Management & Business Excellence 2010. [DOI: 10.1080/1478336032000047237] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Christy T, Murugan N, Kumar S. A Comparative Study on the Microstructures and Mechanical Properties of Al 6061 Alloy and the MMC Al 6061/TiB<sub>2</sub>/12<sub>p</sub>. ACTA ACUST UNITED AC 2010. [DOI: 10.4236/jmmce.2010.91005] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Palani P, Murugan N. Comparison of regression and artificial neural network models for prediction of delta ferrite content in stainless steel claddings. KES 2006. [DOI: 10.3233/kes-2006-10603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- P.K. Palani
- Faculty of Mechanical Engineering, Government College of Technology, Coimbatore – 641 013, India
| | - N. Murugan
- Coimbatore Institute of Technology, Coimbatore – 641 014, India
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Murugan N, Burkhill G, Williams SG, Padley SPG, Murray-Lyon IM. The effect of khat chewing on gallbladder motility in a group of volunteers. J Ethnopharmacol 2003; 86:225-227. [PMID: 12738091 DOI: 10.1016/s0378-8741(03)00079-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An increase in the prevalence of gallstones has been reported from the Middle East and the Republic of Yemen. Changing dietary habits and obesity are thought to be responsible but other local factors may contribute such as chewing the leaves of the khat plant (Catha edulis Forsk.) which is a widespread social custom in Yemen. We have studied the effects of khat chewing on gallbladder motility in a group of 10 healthy volunteers. All subjects underwent ultrasound measurements of gallbladder volume after chewing khat leaves or lettuce, which was used as the control. Results were compared after chewing for up to 2h in the fasting state and in response to a fatty meal. There was no significant change in gallbladder volume after chewing khat compared with lettuce in the fasting state (P=0.7) or in gallbladder emptying after a fatty meal (P=0.4) and we conclude that khat chewing has no clinically significant effect on gallbladder motility.
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Affiliation(s)
- N Murugan
- Department of Gastroenterology, Chelsea and Westminster Hospital, 369 Fulham Road, London SW10 9NH, UK.
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Affiliation(s)
- R G Shidrawi
- Department of Gastroenterology, Chelsea and Westminster Hospital, 369 Fulham Rd, London SW10 9NH, UK.
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Miao YM, Amin Z, Healy J, Burn P, Murugan N, Westaby D, Allen-Mersh TG. A prospective single centre study comparing computed tomography pneumocolon against colonoscopy in the detection of colorectal neoplasms. Gut 2000; 47:832-7. [PMID: 11076883 PMCID: PMC1728155 DOI: 10.1136/gut.47.6.832] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND AND AIMS To determine the sensitivity and specificity of computed tomography (CT) pneumocolon in the detection of colorectal neoplasms. METHODS A total of 201 consecutive patients with colorectal symptoms or requiring surveillance for colorectal neoplasms underwent both conventional colonoscopy and CT pneumocolon. RESULTS On conventional colonoscopy 13 invasive colorectal carcinomas were detected in 13 patients, and 118 polyps in 63 patients (14 polyps were > or =1 cm in diameter, 25 were 6-9 mm, and 79 were < or =5 mm). CT pneumocolon detected all 13 cancers, two false positive cancers, but only 20 polyps (seven were > or =1 cm). This resulted in a sensitivity of 100% (95% confidence interval (CI) 87-100%) and specificity of 99% (95% CI 97-100%) for detection of invasive carcinoma, and a sensitivity of 73% (95% CI 56-90%) and specificity of 94% (95% CI 91-98%) for detection of invasive carcinoma and/or > or =1 cm polyps. CT pneumocolon also identified invasive carcinoma not seen at colonoscopy because of incomplete examination in three patients, and detected metastases in six colorectal carcinoma patients and extracolonic carcinoma in a further seven patients. CONCLUSIONS CT pneumocolon had a high sensitivity and specificity for detection of invasive colorectal carcinoma but not colorectal polyps. CT pneumocolon may be suitable for initial investigation of patients with symptoms of colorectal malignancy.
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Affiliation(s)
- Y M Miao
- Department of Gastroenterology, Chelsea and Westminster Hospital, London, UK
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Abstract
Magnetic resonance (MR) imaging and MR cholangiopancreatography are useful, noninvasive techniques for the assessment of pancreatic and hepatobiliary complications in cystic fibrosis. Abnormalities of the pancreas in cystic fibrosis are typically characterized by fat deposition, which has increased signal intensity on T1-weighted MR images, and pancreatic fibrosis, which has low signal intensity on both T1- and T2-weighted images. Pancreatic cysts are a relatively common finding; these cysts are typically quite small but are well demonstrated at MR imaging and MR cholangiopancreatography. Pancreatic duct abnormalities are also occasionally seen. Hepatic manifestations range from hepatomegaly and diffuse fatty infiltration to severe cirrhosis with fibrotic change, regenerative nodules, and portal hypertension. Splenomegaly is often characterized by siderotic nodules that manifest as multiple focal areas of abnormal low signal intensity within the spleen. Biliary manifestations include cholelithiasis, stricturization, and narrowing or dilatation of intra- and extrahepatic bile ducts. Gallbladder abnormalities including microgallbladder are also readily demonstrated. MR cholangiopancreatography can be used to help determine the presence and severity of biliary complications without resorting to more invasive procedures and, in conjunction with MR imaging, may prove useful in the assessment of patients with cystic fibrosis who present with abdominal symptoms that suggest hepatobiliary involvement.
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Affiliation(s)
- L J King
- Departments of Radiology, Chelsea and Westminster Hospital, London SW10 9NH, England
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