1
|
Sudha G, Saravanan N, Muthalakshmi M, Birunda M. Dynamically stabilized recurrent neural network optimized with Artificial Gorilla Troops espoused Alzheimer's disorder detection using EEG signals. Health Inf Sci Syst 2024; 12:25. [PMID: 38495674 PMCID: PMC10942965 DOI: 10.1007/s13755-024-00284-9] [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: 08/31/2023] [Accepted: 02/21/2024] [Indexed: 03/19/2024] Open
Abstract
Alzheimer's disease is an incurable neurological disorder that damages cognitive abilities, but early identification reduces the symptoms significantly. The absence of competent healthcare professionals has made automatic identification of Alzheimer's disease more crucial since it lessens the amount of work for staff members and improves diagnostic outcomes. The major aim of this work is "to develop a computer diagnostic scheme that makes it possible to identify AD using the Electroencephalogram (EEG) signal". Therefore, Dynamically Stabilized Recurrent Neural Network Optimized with Artificial Gorilla Troops espoused Alzheimer's Disorder Detection using EEG signals (DSRNN-AGTO-ADD) is proposed in this paper. Here, Dynamic Context-Sensitive Filter (DCSF) is considered to eliminate the noise, and interference from the EEG signal. Then Adaptive and Concise Empirical Wavelet Transform (ACEWT) is utilized to separate the filtered signals from the frequency bands, and to feature extraction from the EEG signals. Signal's characteristics, like logarithmic bandwidth power, standard deviation, variance, kurtosis, mean energy, mean square, norm are combined to ACEWT method to create feature vectors and enhance diagnostic performance. After that, the extracted features are fed to Dynamically Stabilized Recurrent Neural Network (DSRNN) for task classification. Weight parameter of DSRNN is enhanced using Artificial Gorilla Troops Optimization Algorithm (AGTOA). The proposed DSRNN-AGTOA-ADD algorithm is activated in MATLAB. The metrics including accuracy, specificity, sensitivity, precision, computation time, ROC are examined for AD diagnosis. The performance of the proposed DSRNN-AGTOA-ADD approach attains 12.98%, 5.98% and 23.45% high specificity; 29.98%, 23.32% and 19.76% lower computation Time and 29.29%, 8.365%, 8.551% and 7.915% higher ROC compared with the existing methods.
Collapse
Affiliation(s)
- G. Sudha
- Department of Biomedical Engineering, Muthayammal Engineering College, Rasipuram, Namakkal, Tamil Nadu India
| | - N. Saravanan
- Department of Biotechnology, Muthayammal Engineering College, Rasipuram, Namakkal, Tamil Nadu India
| | - M. Muthalakshmi
- Department of Bio Medical Engineering, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai, 62 Tamil Nadu India
| | - M. Birunda
- Department of Biomedical Engineering, Muthayammal Engineering College, Rasipuram, Namakkal, Tamil Nadu India
| |
Collapse
|
2
|
Subbiah M, Mariappan A, Sundaramurthy A, Venkatachalam S, Renganathan RT, Saravanan N, Pitchaimuthu S, Srinivasan N. Protonated C 3N 4 Nanosheets for Enhanced Energy Storage in Symmetric Supercapacitors through Hydrochloric Acid Treatment. ACS Omega 2024; 9:11273-11287. [PMID: 38496973 PMCID: PMC10938317 DOI: 10.1021/acsomega.3c06747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 03/19/2024]
Abstract
Next-generation electrochemical energy storage materials are essential in delivering high power for long periods of time. Double-layer carbonaceous materials provide high power density with low energy density due to surface-controlled adsorption. This limitation can be overcome by developing a low-cost, more abundant material that delivers high energy and power density. Herein, we develop layered C3N4 as a sustainable charge storage material for supercapacitor applications. It was thermally polymerized using urea and then protonated with various acids to enhance its charge storage contribution by activating more reaction sites through the exfoliation of the C-N framework. The increased electron-rich nitrogen moieties in the C-N framework material lead to better electrolytic ion impregnation into the electrode, resulting in a 7-fold increase in charge storage compared to the pristine material and other acids. It was found that C3N4 treated with hydrochloric acid showed a very high capacitance of 761 F g-1 at a current density of 20 A g-1 and maintained 100% cyclic retention over 10,000 cycles in a three-electrode configuration, outperforming both the pristine material and other acids. A symmetric device was fabricated using a KOH/LiI gel-based electrolyte, exhibiting a maximum specific capacitance of 175 F g-1 at a current density of 1 A g-1. Additionally, the device showed remarkable power and energy density, reaching 600 W kg-1 and 35 Wh kg-1, with an exceptional cyclic stability of 60% even after 5000 cycles. This study provides an archetype to understand the underlying mechanism of acid protonation and paves the way to a metal-carbon-free environment.
Collapse
Affiliation(s)
- Mahalakshmi Subbiah
- Department
of Renewable Energy Science, Manonmaniam
Sundaranar University, Tirunelveli 627012, India
- Laboratory
of Electrochemical Interfaces, Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli 627012, India
| | - Annalakshmi Mariappan
- Laboratory
of Electrochemical Interfaces, Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli 627012, India
| | - Anandhakumar Sundaramurthy
- Biomaterials
Research Laboratory, Department of Chemical Engineering, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu India
| | - Sabarinathan Venkatachalam
- Department
of Renewable Energy Science, Manonmaniam
Sundaranar University, Tirunelveli 627012, India
- Department
of Physics, Manonmaniam Sundaranar University, Tirunelveli 627012, India
| | | | - Nishakavya Saravanan
- Department
of Physics and Nanotechnology, SRM Institute
of Science and Technology, Kattankulathur603203, Tamil Nadu, India
| | - Sudhagar Pitchaimuthu
- Research
Centre for Carbon Solutions (RCCS), Institute
of Mechanical, Processing and Energy Engineering, School of Engineering
and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K.
| | - Nagarajan Srinivasan
- Laboratory
of Electrochemical Interfaces, Department of Chemistry, Manonmaniam Sundaranar University, Tirunelveli 627012, India
| |
Collapse
|
3
|
Nagabooshanam S, Kumar A, Ramamoorthy S, Saravanan N, Sundaramurthy A. Rapid and sensitive electrochemical detection of oxidized form of glutathione in whole blood samples using Bi-metallic nanocomposites. Chemosphere 2024; 346:140517. [PMID: 37879374 DOI: 10.1016/j.chemosphere.2023.140517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/07/2023] [Accepted: 10/20/2023] [Indexed: 10/27/2023]
Abstract
We report a facile one-pot synthesis of bimetallic nickel-gold (Ni-Au) nanocomposite for ultra-sensitive and selective electrochemical detection of oxidized glutathione (GSSG) by electrochemical deposition on fluorine doped tin oxide (FTO) substrate. The electrodeposition of Ni-Au nanocomposite on FTO was confirmed by various characterization techniques such as field emission scanning electron microscopy (FE-SEM), X-ray diffractometer (XRD) and Fourier transform infra-red (FTIR) spectroscopy. The cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) was utilized for the electrochemical characterization of glutathione reductase (GR)/Ni-Au/FTO working electrode at each stage of modification. The GR enzyme immobilized on the Ni-Au/FTO working electrode via glutaraldehyde cross-linking exhibited excellent selectivity against GSSG in the presence of nicotinamide adenine dinucleotide phosphate (NADPH). The immobilized GR enzyme breaks down the GSSG to reduced glutathione (GSH) and converting NADPH to NADP+ whereby generating an electron for the electrochemical sensing of GSSG. The synergistic behavior of bimetals and good electro-catalytic property of the fabricated sensor provided a broad linear detection range from 1 fM to 1 μM with a limit of detection (LOD) of 6.8 fM, limit of quantification (LOQ) of 20.41 fM and sensitivity of 0.024 mA/μM/cm2. The interference with other molecules such as dopamine, glycine, ascorbic acid, uric acid and glucose was found to be negligible due to the better selectivity of GR enzyme towards GSSG. The shelf-life and response time of the fabricated electrode was found to be 30 days and 32 s, respectively. The real sample analysis of GSSG in whole blood samples showed average recovery percentage from 95 to 101% which matched well with the standard calibration plot of the fabricated sensor with relative standard deviation (RSD) below 10%.
Collapse
Affiliation(s)
- Shalini Nagabooshanam
- Biomaterials Research Laboratory (BMRL), Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu, Tamil Nadu, India; Department of Mechanical Engineering, Toyohashi University of Technology, 1-1 Hibarigaoka, Tenpaku-cho, Toyohashi, Aichi, 441-8580, Japan
| | - Akash Kumar
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu, Tamil Nadu, India
| | - Sharmiladevi Ramamoorthy
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu, Tamil Nadu, India
| | - Nishakavya Saravanan
- Department of Physics and Nanotechnology, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu, Tamil Nadu, India
| | - Anandhakumar Sundaramurthy
- Biomaterials Research Laboratory (BMRL), Department of Chemical Engineering, College of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, 603203, Chengalpattu, Tamil Nadu, India.
| |
Collapse
|
4
|
Saravanan N, Sudha G, Selvarasu S, Hariprakash R, Ajaykumar A, Surjith V. A non-invasive technique to detect thyroid using IoT. CM 2023. [DOI: 10.18137/cardiometry.2023.26.568572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
This system presents a thyroid monitoring sensor for Internet of Things (IoT) applications. The proposed architecture is energy-efficient and user-friendly. Thyroid monitoring can be done either by monitoring the basal body conductance or through blood samples. In this work, basal body conductance is the quantity sensed for thyroid monitoring. The conductance acquisition is performed by an electrode along with an amplifier and a Node MCU. The designed module implements the conductance acquisition module along with the calibration method to dynamically optimize the sensor design. The sensor should be non-intrusive to avoid possible disturbs and also because the person who wears it could feel uncomfortable. Furthermore, the system acquisition should be designed with wireless technology. Finally, the sampling rate of the acquisition and the material of the sensor have to be revised. A large majority of sensors provide signals with artifacts and out layers that make difficult information extraction.
Collapse
|
5
|
Birunda M, Saravanan N, Selvi C, Ramya S, Thirishiya L, Selvabharathi K. Design and implementation of diabetic retinopathy detections on retinal images. CM 2023. [DOI: 10.18137/cardiometry.2023.26.550555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
A retinal picture gives a depiction of what's going on inside the human body. Specifically, the condition of the retinal vessels has been appeared to mirror the cardiovascular state of the body. Retinal pictures give impressive data on neurotic changes brought about by neighbourhood visual illness which uncovers diabetes, hypertension, arteriosclerosis, cardiovascular infection and stroke. PC supported examination of retinal picture assumes a focal part in indicative methodology. Nonetheless, programmed retinal division is muddled by the way that retinal pictures are frequently uproarious, inadequately differentiated, and the vessel widths can shift from enormous to exceptionally little. So in this venture, we can carry out robotize division approach dependent on diagram hypothetical strategy to give local data utilizing measure. We address the portioned vascular construction as a vessel fragment diagram and make the issue of recognize vessels as one of discovering the veins in the chart given a bunch of requirements like CRAE and CRVE. These estimations are found to have great connection with hypertension, coronary illness, and stroke. Be that as it may, they require the precise extraction of particular vessels from a retinal picture. We plan a strategy to tackle this improvement issue and assess it on an enormous genuine world dataset of retinal pictures.
Collapse
|
6
|
Padmapriyadarsini C, Vohra V, Bhatnagar A, Solanki R, Sridhar R, Anande L, Muthuvijaylakshmi M, Rana MB, Jeyadeepa B, Taneja G, Balaji S, Shah P, Saravanan N, Chavan V, Kumar H, Ponnuraja C, Livchits V, Bahl M, Alavadi U, Sachdeva KS, Swaminathan S. Bedaquiline, Delamanid, Linezolid and Clofazimine for Treatment of Pre-extensively Drug-Resistant Tuberculosis. Clin Infect Dis 2022; 76:ciac528. [PMID: 35767251 PMCID: PMC9907500 DOI: 10.1093/cid/ciac528] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 06/18/2022] [Accepted: 06/24/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Treatment success rates for multidrug-resistant tuberculosis (MDR-TB) remain low globally. Availability of newer drugs has given scope to develop regimens that can be patient-friendly, less toxic, with improved outcomes. We proposed to determine the effectiveness of an entirely oral, short-course regimen with Bedaquiline and Delamanid in treating MDR-TB with additional resistance to fluoroquinolones (MDR-TBFQ+) or second-line injectable (MDR-TBSLI+). METHODS We prospectively determined the effectiveness and safety of combining two new drugs with two repurposed drugs - Bedaquiline, Delamanid, Linezolid, and Clofazimine for 24-36 weeks in adults with pulmonary MDR-TBFQ+ or/and MDR-TBSLI+. The primary outcome was a favorable response at end of treatment, defined as two consecutive negative cultures taken four weeks apart. The unfavorable outcomes included bacteriologic or clinical failure during treatment period. RESULTS Of the 165 participants enrolled, 158 had MDR-TBFQ+. At the end of treatment, after excluding 12 patients due to baseline drug susceptibility and culture negatives, 139 of 153 patients (91%) had a favorable outcome. Fourteen patients (9%) had unfavorable outcomes: four deaths, seven treatment changes, two bacteriological failures, and one withdrawal. During treatment, 85 patients (52%) developed myelosuppression, 69 (42%) reported peripheral neuropathy, and none had QTc(F) prolongation >500msec. At 48 weeks of follow-up, 131 patients showed sustained treatment success with the resolution of adverse events in the majority. CONCLUSION After 24-36 weeks of treatment, this regimen resulted in a satisfactory favorable outcome in pulmonary MDR-TB patients with additional drug resistance. Cardiotoxicity was minimal, and myelosuppression, while common, was detected early and treated successfully.
Collapse
Affiliation(s)
| | - Vikram Vohra
- National Institute for Tuberculosis and Respiratory Diseases, New Delhi, India
| | - Anuj Bhatnagar
- Rajan Babu Institute of Pulmonary Medicine and Tuberculosis, Delhi, India
| | | | | | | | | | - Meera Bhatia Rana
- National Institute for Tuberculosis and Respiratory Diseases, New Delhi, India
| | | | - Gaurav Taneja
- Rajan Babu Institute of Pulmonary Medicine and Tuberculosis, Delhi, India
| | - S Balaji
- ICMR–National Institute for Research in Tuberculosis, Chennai, India
| | - Prashant Shah
- B. J. Medical College and Hospital, Ahmedabad, India
| | - N Saravanan
- ICMR–National Institute for Research in Tuberculosis, Chennai, India
| | | | - Hemanth Kumar
- ICMR–National Institute for Research in Tuberculosis, Chennai, India
| | | | | | - Monica Bahl
- Clinical Development Service Agency, New Delhi, India
| | - Umesh Alavadi
- US Agency for International Development, Washington D.C., USA
| | - K S Sachdeva
- Central TB Division, Ministry of Health and Family Welfare, New Delhi, India
| | - Soumya Swaminathan
- Indian Council of Medical Research, New Delhi, India
- World Health Organization, Geneva, Switzerland
| |
Collapse
|
7
|
Deepa Lakshmi KP, Venkatalakshmi S, Bharath C, Saravanan N, Reddy L, Nagilla J. Correlation of knowledge, attitude, and practice with their oral health status among young adults of nursing care: A cross-sectional survey. J Pharm Bioallied Sci 2022; 14:S82-S86. [PMID: 36110659 PMCID: PMC9469441 DOI: 10.4103/jpbs.jpbs_555_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 09/12/2021] [Indexed: 11/04/2022] Open
Abstract
Background: Nursing profession execute an imperative role in health promotion, disease, and injury prevention, providing care and assist in cure of patients with diverse age groups, and backgrounds both in individual and community settings. The study aimed to determine and compare the oral health knowledge, attitude, and practice (KAP) with oral health status among nursing students in Salem. Materials and Methods: A cross-sectional study was conducted on nursing students of Vinayaka Mission's Annapoorna College of Nursing, Salem, Tamil Nadu, India. The study included self-administered questionnaire covering demographic details and oral health KAP questions (18-items) followed by oral examination using the World Health Organization survey (2013). Data analysis was performed using SPSS 22. Results: Two hundred and sixty-one students were included in the survey (63 males and 198 females). Females reported better mean ± standard deviation (SD) in knowledge (24.08 ± 4.3), attitude (5.43 ± 1.3), and practice (10.82 ± 1.5, P = 0.000) than males. Moreover third-year students had higher mean ± SD scores in knowledge (24.42 ± 4.3) and practice (10.89 ± 1.7) while higher mean ± SD attitude scores (5.61 ± 1.2) was reported among second years. Relationship between attitude-practice indicated a positive significant correlation (r = 0.145, P = 0.05). Conclusions: There are an adequate knowledge, negative attitude, and inadequate practice toward oral health among nursing students. The study introspects the gap between knowledge and actions. As attitude influence on a person's behavior, discriminate knowledge in the right direction to best bring out the outcomes.
Collapse
|
8
|
Lakshmi SV, Deepa Lakshmi KP, Bharath C, Saravanan N, Shaik S, Nagilla J. Cervical cancer knowledge and attitude among a cohort of female schoolteachers in Salem city – A cross-sectional survey. J Family Med Prim Care 2022; 11:3459-3464. [DOI: 10.4103/jfmpc.jfmpc_2168_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] [Received: 11/01/2021] [Revised: 02/10/2022] [Accepted: 02/15/2022] [Indexed: 11/04/2022] Open
|
9
|
Bharath C, Lakshmi KPD, Lakshmi SV, Saravanan N. COVID-19 outbreak: Knowledge, attitude, and practice among dental students in a tertiary care hospital: A cross-sectional study. J Indian Assoc Public Health Dent 2022. [DOI: 10.4103/jiaphd.jiaphd_55_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
|
10
|
Affiliation(s)
- Gaurav Marothiya
- Department of Aerospace Engineering IIT Madras Chennai 600036 India
| | | | - N. Saravanan
- PDSS-TSS Propellant Fuel Complex VSSC (ISRO) Thiruvananthapuram 695586 India
| | | |
Collapse
|
11
|
|
12
|
Lakshmi KPD, Bharath C, Venkatalakshmi S, Saravanan N. Correlation of pharmacy students' knowledge, attitude, and practices with their oral health status in Salem city-A cross-sectional survey. J Family Med Prim Care 2020; 9:1944-1949. [PMID: 32670945 PMCID: PMC7346931 DOI: 10.4103/jfmpc.jfmpc_1172_19] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 12/25/2019] [Accepted: 02/20/2020] [Indexed: 11/04/2022] Open
Abstract
Background Pharmacy is the health profession that links the health sciences with the basic sciences also contributes in health maintenance and promotion for the population. Objectives The primary objective was to assess knowledge, attitude, and practice (KAP) among pharmacy students in Salem toward oral health. Secondary objectives are to correlate KAP with their oral health status. Methods A descriptive cross-sectional study was carried out using self-administered 16-item pretested and pre-validated questionnaire and oral health status data were collected using the WHO oral health assessment form (1997) targeting pharmacy students Vinayaka Missions College of pharmacy. Six, four, and six questions were used to assess pharmacy students' knowledge, attitude, and practice, respectively. Data analysis was done using SPSS version 20.0 to perform the Chi-square test, Mann-Whitney, Kruskal-Wallis, Spearman's correlation, and linear regression analysis. Results 386 participated in the survey (263 males and 123 females). The highest mean for knowledge was among 17-21 years of age group students (18.07 ± 3.07) and this was statistically significant when compared to another age group (P < 0.05). The gender difference was seen with males having a significantly (P < 0.001) more positive mean ± SD oral health KAP compared to their female counterparts. KAP scores upon correlation revealed a positive relationship between knowledge-attitude (r = 0.015), knowledge-practice (r = 0.016), and attitude-practice (r = 0.069). Results 386 participated in the survey (263 males and 123 females). The highest mean for knowledge was among 17-21 years of age group students (18.07 ± 3.07) and this was statistically significant when compared to another age group (P < 0.05). The gender difference was seen with males having a significantly (P < 0.001) more positive mean ± SD oral health KAP compared to their female counterparts. KAP scores upon correlation revealed a positive relationship between knowledge-attitude (r = 0.015), knowledge-practice (r = 0.016), and attitude-practice (r = 0.069). Conclusion Results of this study suggest that oral health KAP of students is inadequate and needs to be improved as they play an important role in the patients' counseling toward oral care.
Collapse
Affiliation(s)
- K Priya Deepa Lakshmi
- Department of Public Health Dentistry, Vinayaka Mission Sankarachariyar Dental College, Vinayaka Missions Research Foundation (Deemed to be University), Salem, Tamil Nadu, India
| | - C Bharath
- Department of Public Health Dentistry, Vinayaka Mission Sankarachariyar Dental College, Vinayaka Missions Research Foundation (Deemed to be University), Salem, Tamil Nadu, India
| | - S Venkatalakshmi
- Department of Public Health Dentistry, Vinayaka Mission Sankarachariyar Dental College, Vinayaka Missions Research Foundation (Deemed to be University), Salem, Tamil Nadu, India
| | - N Saravanan
- Department of Public Health Dentistry, Vinayaka Mission Sankarachariyar Dental College, Vinayaka Missions Research Foundation (Deemed to be University), Salem, Tamil Nadu, India
| |
Collapse
|
13
|
Fowler M, Mendez L, Whitehead S, Shah B, Garel K, Saravanan N, Hendessi P, Anand M. 79: Liposomal bupivacaine in open gynecologic surgery at an urban safety-net hospital. Am J Obstet Gynecol 2020. [DOI: 10.1016/j.ajog.2019.12.119] [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: 11/25/2022]
|
14
|
Venkatesh S, Sakthivel M, Saranav H, Saravanan N, Rathnakumar M, Santhosh K. Performance investigation of the combined series and parallel arrangement cyclone separator using experimental and CFD approach. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2019.10.087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
15
|
Venkatesan M, Arumugam V, Ayyasamy R, Murugesan S, Saravanan N, Sundaresan U, Ramachandran S, Manivasagam T, Thenmozhi AJ, Qoronfleh MW. Bioactive Metabolites from Marine Ascidians: Future Treatment for Autism Spectrum Disorder. Adv Neurobiol 2020; 24:661-678. [PMID: 32006379 DOI: 10.1007/978-3-030-30402-7_25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Autism spectrum disorder (ASD) is a developmental disorder that influences communication and behavior. Numerous researches propose that genes can act together with manipulations from the environment to affect development in ways that lead to ASD. The broad range of issues facing people with ASD means that there is no single proper drug and treatment for ASD. Numerous shortcomings associated with the present conventional therapeutic strategies have forced researchers to venture into alternative natural sources for effective compounds. The marine environment has emerged as an alternate search environment due to its versatile conditions where organisms employ various biodefense mechanisms for their survival. Ascidians are an excellent source for unique bioactive compounds with nutritive and therapeutic content and it still holds credit for being an underused source from marine animals. Bioactive compounds isolated from ascidians have various commendable biomedical applications due to their unique chemical structures. The present chapter will focus on the potential of bioactive compounds derived from ascidians for the treatment of the neurologic disorder-ASD.
Collapse
Affiliation(s)
- Manigandan Venkatesan
- Department of Medical Biotechnology, Chettinad Academy of Research and Education, Chennai, Tamil Nadu, India
| | - Velusamy Arumugam
- Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India.
| | - Rathinam Ayyasamy
- Department of Animal Science, Centre for Pheromone Technology, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - Selvakumar Murugesan
- Department of Biotechnology, Anna University, Tiruchirappalli, Tamil Nadu, India
| | - Nishakavya Saravanan
- Department of Medical Biotechnology, Chettinad Academy of Research and Education, Chennai, Tamil Nadu, India
| | - Umamaheswari Sundaresan
- Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - Saravanan Ramachandran
- Department of Medical Biotechnology, Chettinad Academy of Research and Education, Chennai, Tamil Nadu, India
| | - Thamilarasan Manivasagam
- Department of Biochemistry and Biotechnology, Annamalai University, Chidambaram, Tamil Nadu, India
| | | | - M Walid Qoronfleh
- Research & Policy Department, World Innovation Summit for Health (WISH), Qatar Foundation, Doha, Qatar
| |
Collapse
|
16
|
|
17
|
Srinivasan M, Venkatesan M, Arumugam V, Natesan G, Saravanan N, Murugesan S, Ramachandran S, Ayyasamy R, Pugazhendhi A. Green synthesis and characterization of titanium dioxide nanoparticles (TiO2 NPs) using Sesbania grandiflora and evaluation of toxicity in zebrafish embryos. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.02.010] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
18
|
Arumugam V, Venkatesan M, Saravanan N, Ramachandran S, Sengodan K, Sundaresan U, Palanisamy SK. Tunicates as a biocontrol tool for larvicides acute toxicity of Zika virus vector Aedes aegypti. 3 Biotech 2019; 9:172. [PMID: 30997309 PMCID: PMC6456632 DOI: 10.1007/s13205-019-1699-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 04/01/2019] [Indexed: 12/13/2022] Open
Abstract
In this present study, we conducted untargeted metabolic profiling using gas chromatography-mass spectrometry (GC-MS) analysis of ascidian Didemnum bistratum to assess the chemical constituents by searching in NIST library with promising biological properties against anti-bacterial and Zika virus vector mosquitocidal properties. Metabolites, steroids and fatty acids are abundant in crude compounds of ascidian D. bistratum and showed potential zone growth inhibition against bacterial strains Kluyvera ascorbate (10 mm). The active crude compounds of D. bistratum exhibited prominent larvicidal activity against the Zika vector mosquitoes of Aedes aegypti (LC50 values of 0.44 mg/ml) and Cluex quinquefasciatus (LC50 values of 2.23 mg/ml). The findings of this study provide a first evidence of the biological properties exhibited by D. bistratum extracts, thus increasing the knowledge about the Zika virus vector mosquitocidal properties of ascidian. Overall, ascidian D. bistratum is promising and biocontrol or eco-friendly tool against A. aegypti and C. quinquefasciatus with prospective toxicity against non-target organisms.
Collapse
Affiliation(s)
- Velusamy Arumugam
- Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024 India
| | - Manigandan Venkatesan
- Native Medicine and Marine Pharmacology Laboratory, Department of Medical Biotechnology, Chettinad Academy of Research and Education, Kelambakkam, Chennai, Tamil Nadu 603 013 India
| | - Nishakavya Saravanan
- Native Medicine and Marine Pharmacology Laboratory, Department of Medical Biotechnology, Chettinad Academy of Research and Education, Kelambakkam, Chennai, Tamil Nadu 603 013 India
| | - Saravanan Ramachandran
- Native Medicine and Marine Pharmacology Laboratory, Department of Medical Biotechnology, Chettinad Academy of Research and Education, Kelambakkam, Chennai, Tamil Nadu 603 013 India
| | - Karthi Sengodan
- Department of Biochemistry, K.S. Rangasamy College of Arts and Science (Autonomous), Tiruchengode, Namakkal, Tamil Nadu 637 215 India
| | - Umamaheswari Sundaresan
- Department of Environmental Biotechnology, School of Environmental Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu 620 024 India
| | - Satheesh Kumar Palanisamy
- Department of Zoology, Ryan Institute, School of Natural Science, National University of Ireland, Galway, Ireland
| |
Collapse
|
19
|
Kassim A, Zainal Z, Saravanan N, Vikneshwari R, Malathi S. Preparation and Studies of Electrodeposited CuSe Thin Films. Eurasian Chem Tech J 2017. [DOI: 10.18321/ectj598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Cathodic electrodeposition in the presence of sodium dodecyl-sulphate in aqueous solution was used to prepare CuSe thin film deposited on titanium substrates. The effect of deposition potential, concentration<br />and deposition time were studied to determine the optimum condition for the electrodeposition process. The films were characterized by X-ray diffractrometry. Scanning electron microscopy was used to study<br />the morphology of the deposits. The photoresponse of the films prepared was analysed using linear sweep voltammetry in the presence of sodium thiosulphate.
Collapse
|
20
|
Abstract
INTRODUCTION Male homosexual behavior carries a high risk of transmitting sexually transmitted infections (STIs). Ignorance regarding the associated high risk, indulgence inspite of no natural homosexual orientation and not using protective barrier methods can affect the sexual health of adolescents and adults. AIM (1) To assess the proportion of men who have sex with men (MSM) having a natural homosexual orientation compared to those who had acquired the homosexual behavior initially under various circumstances (such as due to certain misconceptions, fear of having heterosexual contact, peer pressure, and influence of alcohol). (2) To assess the level of awareness regarding increased risk of transmission of STIs associated with homosexual behavior and regarding protective barrier methods. MATERIALS AND METHODS After obtaining consent from the subjects, questionnaire - based interview used for obtaining data for this observational (cross-sectional) study. RESULTS (1) Of the 50 subjects, only about 25% had interest in homosexual behavior prior to initial episode. (2) About 50% subjects indulged in homosexual behavior due to lack/fear of having heterosexual contact. (3) About 60% subjects believed that homosexual behavior carried relatively lower risk of acquiring STIs and 68% subjects have had unprotected contact. (4) About 70% subjects had only acquired this behavior and nearly 60% subjects were interested in heterosexual marriage and not interested in further homosexual behavior. CONCLUSION (1) Homosexuality is a natural orientation in some and an acquired behavior in the rest. (2) If homosexual behavior is acquired, due to misconceptions, then imparting sex education and awareness regarding involved risks, and the importance of protective barrier methods will prevent ignorance driven behavior. For those with natural homosexual orientation, the importance of protective barrier methods in homosexual behavior needs emphasis.
Collapse
Affiliation(s)
- R Ramachandran
- Department of Dermatology, Venereology and Leprosy, SRM Medical College and Hospital, Chennai, India
| | - Sudha Viswanath
- Institute of Venereology, Madras Medical College and Rajiv Gandhi Government General Hospital, Chennai, India
| | - P Elangovan
- Department of Dermatology, Chettinad Hospital and Research Institute, Chennai, India
| | - N Saravanan
- Department of Dermatology, Madras Medical College and Rajiv Gandhi Government General Hospital, Chennai, India
| |
Collapse
|
21
|
Ramachandran R, Viswanath S, Elangovan P, Saravanan N. A study on male homosexual behavior. Indian J Sex Transm Dis AIDS 2015; 36. [PMID: 26692607 PMCID: PMC4660555 DOI: 10.4103/2589-0557.167153] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Male homosexual behavior carries a high risk of transmitting sexually transmitted infections (STIs). Ignorance regarding the associated high risk, indulgence inspite of no natural homosexual orientation and not using protective barrier methods can affect the sexual health of adolescents and adults. AIM (1) To assess the proportion of men who have sex with men (MSM) having a natural homosexual orientation compared to those who had acquired the homosexual behavior initially under various circumstances (such as due to certain misconceptions, fear of having heterosexual contact, peer pressure, and influence of alcohol). (2) To assess the level of awareness regarding increased risk of transmission of STIs associated with homosexual behavior and regarding protective barrier methods. MATERIALS AND METHODS After obtaining consent from the subjects, questionnaire - based interview used for obtaining data for this observational (cross-sectional) study. RESULTS (1) Of the 50 subjects, only about 25% had interest in homosexual behavior prior to initial episode. (2) About 50% subjects indulged in homosexual behavior due to lack/fear of having heterosexual contact. (3) About 60% subjects believed that homosexual behavior carried relatively lower risk of acquiring STIs and 68% subjects have had unprotected contact. (4) About 70% subjects had only acquired this behavior and nearly 60% subjects were interested in heterosexual marriage and not interested in further homosexual behavior. CONCLUSION (1) Homosexuality is a natural orientation in some and an acquired behavior in the rest. (2) If homosexual behavior is acquired, due to misconceptions, then imparting sex education and awareness regarding involved risks, and the importance of protective barrier methods will prevent ignorance driven behavior. For those with natural homosexual orientation, the importance of protective barrier methods in homosexual behavior needs emphasis.
Collapse
Affiliation(s)
- R. Ramachandran
- Department of Dermatology, Venereology and Leprosy, SRM Medical College and Hospital, Chennai, India,Address for correspondence: Dr. R. Ramachandran, D-201, Purva Jade Apts, No.170, Arcot Road, Valasaravakkam, Chennai - 600 087, Tamil Nadu, India. E-mail:
| | - Sudha Viswanath
- Institute of Venereology, Madras Medical College and Rajiv Gandhi Government General Hospital, Chennai, India
| | - P. Elangovan
- Department of Dermatology, Chettinad Hospital and Research Institute, Chennai, India
| | - N. Saravanan
- Department of Dermatology, Madras Medical College and Rajiv Gandhi Government General Hospital, Chennai, India
| |
Collapse
|
22
|
Kodeeswaran M, Ramesh VG, Saravanan N, Udesh R. Percutaneous retrogasserian glycerol rhizotomy for trigeminal neuralgia: A simple, safe, cost-effective procedure. Neurol India 2015; 63:889-94. [PMID: 26588622 DOI: 10.4103/0028-3886.170103] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVE Trigeminal neuralgia (TN) is a condition that has been studied over decades and whose pathogenesis has still not been well defined. Various open and minimally invasive procedures are in vogue for the treatment of intractable TN. All these procedures have their complications and recurrence rates. Percutaneous retrogasserian glycerol rhizotomy (PRGR) is one of the minimally invasive procedures that have been popular for quite a long time. MATERIAL AND METHODS This paper is a prospective study analyzing the results of 93 patients with refractory TN who were treated with PRGR. RESULTS There was an immediate pain relief in 96.8% of patients and long-term pain relief in 89.4% of patients, with a mean follow-up duration of 18.8 months. Recurrence of pain was seen in 10.4% of patients. CONCLUSIONS The PRGR is a simple, safe, cost-effective procedure without any need for expensive equipment and with a good outcome that is compared to the other relatively more expensive open and minimally invasive procedures.
Collapse
Affiliation(s)
- M Kodeeswaran
- Department of Neurosurgery, Institute of Neurology, Madras Medical College, Chennai, Tamil Nadu, India
| | | | | | | |
Collapse
|
23
|
Saravanan N, Thiruneervannan R, Christopher P. A Study to Assess the Periodontal Status of Transgender in Chennai City. ACTA ACUST UNITED AC 2014. [DOI: 10.13005/bbra/1567] [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: 11/16/2022]
|
24
|
|
25
|
Arora A, Delloglio E, Ceccarelli A, Glanz B, Healy B, Tauhid S, Jackson J, Saravanan N, Benedict R, Bakshi R, Neema M. Quantification of Global Cerebral Gray Matter Atrophy in Multiple Sclerosis from 3T MRI (P03.056). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.056] [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: 11/15/2022] Open
|
26
|
Jaianand K, Saravanan N, Gunasekaran P, Sheriff AK. Development of a new method for diagnosis of Group B Coxsackie genome by reverse transcription loop-mediated isothermal amplification. Indian J Med Microbiol 2011; 29:110-7. [PMID: 21654103 DOI: 10.4103/0255-0857.81780] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Coxsackie B viruses (genus, Enterovirus; family, Picornaviridae) can cause aseptic meningitis, encephalitis, pleurodynia, and fatal myocarditis, and are implicated in the pathogenesis of dilated cardiomyopathy. The differentiation of the group B Coxsackieviruses into their subtypes has potential clinical and epidemiological implications. OBJECTIVE In this study, we developed a one-step, single-tube genogroup-specific reverse transcription loop-mediated isothermal amplification (RT-LAMP) assay for the detection of group B Coxsackie genomes targeting 5' UTR region. MATERIALS AND METHODS The amplification can be obtained in less than 1 hour by incubating all the reagents in a single tube with reverse transcriptase and Bst DNA polymerase at 63°C. Detection of gene amplification could be accomplished by agarose gel electrophoresis and the monitoring of gene amplification can also be visualised with the naked eye by using SYBR green I fluorescent dye. RESULTS A total of 40 samples comprising 31 positive samples and 9 negative samples were used in this study for comparative evaluation. The results were compared with those from Real-Time Polymerase Chain Reaction (RT-PCR). None of the RT-PCR-positive samples were missed by RT-LAMP, thereby indicating a higher sensitivity of the RT-LAMP assay. CONCLUSION Thus, due to easy operation without a requirement of sophisticated equipment and skilled personnel, the RT-LAMP assay reported here is extremely rapid, cost-effective, highly sensitive, and specific and has potential usefulness for rapid detection of non-polio enterovirus (NPEV) not only by well-equipped laboratories but also by peripheral diagnostic laboratories with limited financial resources in developing countries.
Collapse
Affiliation(s)
- K Jaianand
- Department of Virology, King Institute of Preventive Medicine, Guindy, Chennai 600 032, India.
| | | | | | | |
Collapse
|
27
|
Thakkar AD, Raj H, Chakrabarti D, Ravishankar, Saravanan N, Muthuvelan B, Balakrishnan A, Padigaru M. Identification of gene expression signature in estrogen receptor positive breast carcinoma. Biomark Cancer 2010; 2:1-15. [PMID: 24179381 PMCID: PMC3783308 DOI: 10.4137/bic.s3793] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A significant group of patient with estrogen receptor (ER) α positive breast tumors fails to appreciably respond to endocrine therapy. An increased understanding of the molecular basis of estrogen-mediated signal transduction and resultant gene expression may lead to novel strategies for treating breast cancer. In this study, we sought to identify the dysregulated genes in breast tumors related to ERα status. Microarray analyses of 31 tumor samples showed 108 genes differentially expressed in ERα (+) and ERα (−) primary breast tumors. Further analyses of gene lists indicated that a significant number of dysregulated genes were involved in mRNA transcription and cellular differentiation. The majority of these genes were found to have promoter-binding sites for E74-like factor 5 (ELF5; 54.6% genes), E2F transcription factor 1 (E2F1; 22.2% genes), and nuclear transcription factor Y alpha (NFYA; 32.4% genes). Six candidate genes (NTN4, SLC7A8, MLPH, ENPP1, LAMB2, and PLAT) with differential expression were selected for further validation studies using RT-qPCR (76 clinical specimen) and immunohistochemistry (48 clinical specimen). Our studies indicate significant over-expression of all the six genes in ERα (+) breast tumors as compared to ERα (−) breast tumors. In vitro studies using T-47D breast cancer cell line confirmed the estrogen dependant expression of four of the above six genes (SLC7A8, ENPP1, LAMB2, and PLAT). Collectively, our study provides further insights into the molecular basis of estrogen-dependent breast cancer and identifies “candidate biomarkers” that could be useful for predicting endocrine responsiveness.
Collapse
Affiliation(s)
- Arvind D Thakkar
- Department of Biomarker Discovery, Piramal Life Sciences Limited, Mumbai, Maharashtra, India
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Saravanan N, Siddabattuni VK, Ramachandran K. Fault diagnosis of spur bevel gear box using artificial neural network (ANN), and proximal support vector machine (PSVM). Appl Soft Comput 2010. [DOI: 10.1016/j.asoc.2009.08.006] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
29
|
Radhakrishnan NV, Saravanan N, Namushi RN, Sharma RK, Johns CW, West CGH. A case of intractable nausea and vomiting following posterior fossa craniotomy. Br J Neurosurg 2007; 21:621-3. [PMID: 18071994 DOI: 10.1080/02688690701534730] [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: 10/22/2022]
Abstract
We describe a unique case of prolonged nausea and vomiting following posterior fossa craniotomy for removal of a meningioma. No apparent neurological or gastrointestinal causes were discovered except for a delayed gastric emptying time. The symptoms gradually resolved along with normalization of the gastric emptying time. Possible pathogenic mechanisms are discussed.
Collapse
Affiliation(s)
- N V Radhakrishnan
- Department of Gastroenterology, Rochdale Infirmary, Pennine Acute Hospitals NHS Trust, UK
| | | | | | | | | | | |
Collapse
|
30
|
Kalra N, Suri S, Bhasin DK, Sinha SK, Saravanan N, Kour T, Vaiphei K, Wig JD. Comparison of multidetector computed tomographic colonography and conventional colonoscopy for detection of colorectal polyps and cancer. Indian J Gastroenterol 2006; 25:229-32. [PMID: 17090838] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Computed tomographic colonography (CTC) is a new technique for detecting colonic neoplasms. Data on the utility of this method in the Indian population are limited. METHODS Forty-two patients with symptoms of colonic disease underwent CTC and conventional colonoscopy (CC) within one week of each other and the findings at these two investigations were compared. RESULTS The entire colon could be evaluated in 38 patients on CTC and in 23 patients on CC. Of the 19 patients who had incomplete CC, 14 had occlusive colonic lesions. Of the 86 lesions detected on CC, 76 (88.4%) were correctly identified on CTC with regard to location and size. CTC was false negative for 10 lesions and false positive for 5 lesions in 3 patients. The sensitivity and specificity of CTC were 65% and 77%, respectively, for lesions 1-5 mm; 97% and 83% for 6-9 mm-sized lesions; and 100% and 100% for lesions 10 mm or larger. Extracolonic findings were seen in 24 of 42 patients (57%). CONCLUSIONS CTC is reliable for detecting lesions 6 mm or larger in size. It permits evaluation of the region proximal to an occlusive growth, which is often not possible with CC.
Collapse
Affiliation(s)
- Naveen Kalra
- Department of Radiodiagnosis, Postgraduate Institute of Medical Education and Research, Chandigarh 160 012, India.
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Saravanan N, Reddy C, Veeresh DJ. A Study to Assess the Oral Health Status and Treatment Needs of Eunuchs in Chennai City. J Indian Assoc Public Health Dent 2006. [DOI: 10.4103/2319-5932.194995] [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: 02/25/2023] Open
|
32
|
Saravanan N, Bapuraj JR, Suri S. Radiology quiz case 4. Osteosarcoma of the maxilla. ACTA ACUST UNITED AC 2004; 130:1445, 1450. [PMID: 15611414 DOI: 10.1001/archotol.130.12.1445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Affiliation(s)
- N Saravanan
- Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | | | | |
Collapse
|
33
|
Tarafder MTH, Kasbollah A, Saravanan N, Crouse KA, Ali AM, Tin Oo K. S-methyldithiocarbazate and its Schiff bases: evaluation of bondings and biological properties. J Biochem Mol Biol Biophys 2002; 6:85-91. [PMID: 12186762 DOI: 10.1080/10258140290027207] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Eight selective nitrogen-sulfur donor ligands have been synthesized from the condensation of S-methyldithiocarbazate (SMDTC) with aldehydes and ketones with a view to evaluating their antimicrobial and cytotoxic activities, and also to correlate the biological properties with the structure of the ligands. The compounds were all characterized by elemental analyses and other physicochemical techniques. SMDTC and the Schiff bases were screened for antimicrobial and cytotoxic activities. SMDTC showed very large inhibition zones (24-44 mm) against bacteria and fungi with a minimum inhibitory concentration (MIC) of 390-25,000 and 1562-6250 microg ml(-1), against different bacteria and fungi, respectively. Streptomycin and nystatin were used as the internal standards against bacteria and fungi, respectively. SMDTC along with its Schiff bases with pyridine-2-carboxaldehyde, acetylacetone and 2,3-butanedione were strongly antifungal and the MIC values were comparable to nystatin. Most of the Schiff bases were strongly cytotoxic. In particular, those with pyridine-2-carboxaldehyde and 2,3-butanedione have CD(50) values of 5.5, 1.9-2.0 microg ml(-1), respectively, against leukemic cells, while against colon cancer cells, the values were 3.7 and 2.0 microg ml(-1), respectively. The glyoxal Schiff base was strongly active only against leukemic cell with CD(50) value of 4.0 microg ml(-1). The present findings have been compared with standard drugs.
Collapse
|
34
|
Tarafder Μ, Saravanan N, Crouse K, Yamin Β, Fun HK, Raj S, Razak I. Crystal structure of 5-methyl ß-N-(methylacetyl)methylenedithiocarbazate, C6H10N2OS2. Z KRIST-NEW CRYST ST 2001. [DOI: 10.1524/ncrs.2001.216.14.293] [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: 11/24/2022]
|
35
|
|
36
|
Tarafder MTH, Saravanan N, Crouse KA, Yamin BM, Raj SSS, Razak IA, Fun HK. Crystal structure of 2,5-di-5-benzyl(1-thia-3,4-diazacyclopenta-2,5-diene), C16H14N2S3. Z KRIST-NEW CRYST ST 2000. [DOI: 10.1515/ncrs-2000-0413] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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)
- M. T. H. Tarafder
- 1Universiti Putra Malaysia, Department of Chemistry, 43400 Serdang, Selangor, Malaysia
| | - N. Saravanan
- 1Universiti Putra Malaysia, Department of Chemistry, 43400 Serdang, Selangor, Malaysia
| | - K. A. Crouse
- 1Universiti Putra Malaysia, Department of Chemistry, 43400 Serdang, Selangor, Malaysia
| | - B. M. Yamin
- 2Universiti Kebangsaan Malaysia, School of Chemical Sciences and Food Technology, 43600 Bangi, Selangor, Malaysia
| | - S. S. S. Raj
- 3Universiti Sains Malaysia, School of Physics, X-ray Crystallography Unit, 11800 USM, Penang, Malaysia
| | - I. A. Razak
- 3Universiti Sains Malaysia, School of Physics, X-ray Crystallography Unit, 11800 USM, Penang, Malaysia
| | - H.-K. Fun
- 3Universiti Sains Malaysia, School of Physics, X-ray Crystallography Unit, 11800 USM, Penang, Malaysia
| |
Collapse
|
37
|
|
38
|
Abstract
OBJECTIVE To study the effect of L-cysteine on urinary risk factors in hyperoxaluric urolithiasis in rats. MATERIALS AND METHODS Twenty-four rats were divided into four groups of six rats each; those in Group I served as controls, those in Group II had hyperoxaluria induced using sodium glycollate, those in Group III were given cysteine alone and those in Group IV were given sodium glycollate and cysteine. Samples of 24 h urine were collected and analysed to determine the content of calcium, oxalate, phosphorus and magnesium, and the organic acids, glycollic, glyoxylic and citric acid. RESULTS Hyperoxaluric rats treated with cysteine had significantly lower excretion rates of calcium, oxalate, phosphorus, glycollic and glyoxylic acid than the glycollate fed rats. When cysteine was given, the excretion of urinary citric acid and magnesium were also increased. CONCLUSION Cysteine may be a useful agent in preventing oxalate urolithiasis.
Collapse
Affiliation(s)
- N Saravanan
- Department of Medical Biochemistry, Dr A L M Post-Graduate Institute of Basic Medical Sciences, University of Madras, India
| | | | | |
Collapse
|
39
|
Senthil D, Subha K, Saravanan N, Varalakshmi P. Influence of sodium pentosan polysulphate and certain inhibitors on calcium oxalate crystal growth. Mol Cell Biochem 1996; 156:31-5. [PMID: 8709973 DOI: 10.1007/bf00239316] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 02/01/2023]
Abstract
Calcium oxalate crystal growth and aggregation leads to the formation of renal calculi. It is known to be inhibited by several compounds both in vitro and in vivo conditions. The present study highlights the inhibitory potential of sodium pentosan polysulphate (SPP), a semi-synthetic glycosaminoglycan (GAG) on calcium oxalate crystal growth in vitro. Its efficacy was compared with those of known inhibitors like pyrophosphate, heparin and chondroitin-4-sulphate. Of the above compounds pyrophosphate was found to be the most potent inhibitor. Among the GAGs, SPP exhibited 80% inhibitory activity as compared to heparin. A lesser degree of inhibition was observed with chondroitin-4-sulphate.
Collapse
Affiliation(s)
- D Senthil
- Department of Medical Biochemistry, Dr. A.L.M. Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani, India
| | | | | | | |
Collapse
|
40
|
Govindarajan S, Nasrin Banu SU, Saravanan N, Sivasankar BN. Bis-hydrazine metal maleates and fumarates: Preparation, spectral and thermal studies. J CHEM SCI 1995. [DOI: 10.1007/bf02869486] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
41
|
Abstract
Oxalate, the major stone-forming constituent induces lipid peroxidation during lithogenesis. In experimental condition oxalate formation was induced by the administration of its precursor glycollate. Glycollate-fed rats showed increased susceptibility to lipid peroxidation in the presence of promoters. In addition, antioxidant enzymes-catalase, superoxide dismutase and glutathione peroxidase also showed decreased activity. Reduced glutathione, total thiols and ascorbic acid were also significantly decreased. On the other hand, an increased xanthine oxidase and decreased glucose-6-phosphate dehydrogenase activity was also observed upon glycollate administration. Cysteine, a sulphydryl compound, is known to inhibit free radical toxicity in various pathologies. Cysteine administration to glycollate-fed rats brought about a significant decrease in the peroxidative level, with an increase in the antioxidant status.
Collapse
Affiliation(s)
- N Saravanan
- Department of Medical Biochemistry, University of Madras, India
| | | | | |
Collapse
|
42
|
Baskar R, Saravanan N, Varalakshmi P. Effect ofCrataeva nurvala bark decoction on enzymatic changes in liver of normal and stone forming rats. Indian J Clin Biochem 1995. [DOI: 10.1007/bf02871010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
43
|
|
44
|
Abstract
Evolutionary algorithms, including evolutionary programming and evolution strategies, have often been applied to real-valued function optimization problems. These algorithms generally operate directly on the real values to be optimized, in contrast with genetic algorithms which usually operate on a separately coded transformation of the objective variables. Evolutionary algorithms often rely on a second-level optimization of strategy parameters, tunable variables that in part determine how each parent will generate offspring. Two alternative methods for performing this second-level optimization have been proposed and are compared across a series of function optimization tasks. The results appear to favor the approach offered originally in evolution strategies, although the applicability of the findings may be limited to the case where each parameter of a parent solution is perturbed independently of all others.
Collapse
|
45
|
Abstract
Glyoxylic lithiasis by acute intoxication with sodium glyoxylate, significantly raised the levels of renal tissue calcium and oxalate which has been reflected simultaneously in their urinary levels. Administration of DL alpha-lipoic acid lowered the oxalate levels in the kidney and urine. Sodium glyoxylate administration resulted in enhanced liver glycollate oxidase activity, the major enzyme in endogenous oxalate synthesis. DL alpha-lipoic acid decreased glycollate oxidase activity but did not have any effect on lactate dehydrogenase. The possibility of regulating oxalate metabolism in glyoxylic lithiasis with the use of DL alpha-lipoic acid, by way of inhibiting liver glycollate oxidase, looks attractive.
Collapse
Affiliation(s)
- S Jayanthi
- Department of Medical Biochemistry, Dr A.L. Mudaliar Post Graduate Institute of Basic Medical Sciences, University of Madras, India
| | | | | |
Collapse
|
46
|
Abstract
The chemical bath deposition technique was used to deposit thin films of coppersulphide onto indium tin oxide glass substrates. The bath composition included copperchloride which was the source of Cu2+ and sodium thiosulfate which supplied the S2- ions. Xraydiffraction and atomic force microscopy were used to investigate structural andmorphological characterization, respectively. The influence of deposition time was studiedto determine the optimum condition for deposition process. The deposited CuS films showedhexagonal structure. The number of peaks attributable to CuS increased as the depositiontime was increased to 16 hours based on XRD data. AFM images revealed that the chemicalbath-deposited films for 16 hours showed more homogeneous and uniform compared withother deposition times, and the highest absorbance value was obtained for the filmsdeposited at this period. The band gap energy decreased from 2.9 to 2.45 eV when thedeposition time was increased from 8 to 20 hours.Keywords: Chemical bath deposition, copper sulphide, thin films, solar cells.DOI: 10.3126/jncs.v25i0.3276Journal of Nepal Chemical Society Volume 25, 2010 pp 2-8
Collapse
|