1
|
Kuril AK, Saravanan K. High-throughput method for Peptide mapping and Amino acid sequencing for Calcitonin Salmon in Calcitonin Salmon injection using Ultra High Performance Liquid Chromatography - High Resolution Mass Spectrometry (UHPLC-HRMS) with the application of Bioinformatic tools. J Pharm Biomed Anal 2024; 243:116094. [PMID: 38479303 DOI: 10.1016/j.jpba.2024.116094] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 02/21/2024] [Accepted: 03/05/2024] [Indexed: 04/06/2024]
Abstract
BACKGROUND Tandem mass spectrometry (MS/MS) can provide direct and accurate sequence characterization of synthetic peptide drugs, and peptide drug products including side chain modifications in the Peptide drugs. This article explains a step-by-step guide to developing a high-throughput method using high resolution mass spectrometry for characterization of Calcitonin Salmon injection containing high proportion of UV-active excipients. METHODS The major challenge in the method development of Amino acid sequencing and Peptide mapping was presence of phenol in drug product. Phenol is a UV-active excipient and reacts with both Dithiothreitol (DTT) and Trypsin. Hence Calcitonin Salmon was extracted from the Calcitonin Salmon injection using solid phase extraction after the extraction, Amino acid sequencing and peptide mapping study was performed. Upon incubation of Calcitonin Salmon with Trypsin and DTT, digested fragments were generated which were separated by mass compatible reverse phase chromatography and the molecular mass of each fragment was determined using HRMS. RESULTS A reverse phase chromatographic method was developed using UHPLC-HRMS for the determination of direct mass, peptide mapping and to determine the amino acid sequencing in the Calcitonin Salmon injection. The method was found Specific and fragments after trypsin digest are well resolved from each other and the molecular mass of each fragment was determined using HRMS. Sequencing was performed using automated identification of b and y ions annotation and identifications based on MS/MS spectra using Biopharma finder and Proteome discoverer software. CONCLUSION Using this approach 100% protein coverage was obtained and protein was identified as Calcitonin Salmon and the observed masses of tryptic digest of peptide was found similar with theoretical masses. The method can be used for both UV and MS based Peptide mapping and whereas the UV based peptide mapping method can be used as identification test for Calcitonin Salmon drug substance and drug product in quality control.
Collapse
Affiliation(s)
| | - K Saravanan
- Bhagwant University, Sikar Road, Ajmer, Rajasthan, India
| |
Collapse
|
2
|
P K, K S, M A, Egbuna C. Preparation of bio-synthesized Ag nanoparticles and assessment of their antidiabetic and antioxidant potential against STZ-induced diabetic albino rats. J Biomater Sci Polym Ed 2024; 35:535-558. [PMID: 38234041 DOI: 10.1080/09205063.2024.2301808] [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: 09/29/2023] [Accepted: 12/29/2023] [Indexed: 01/19/2024]
Abstract
Bio-synthesized silver nanoparticles (AgNPs) were successfully obtained using the leaf extract from Ventilago maderaspatana. Extensive analysis was conducted to evaluate the physical and chemical characteristics of the bioderived AgNPs. XRD analysis confirmed their cubic structure, and revealed a well-defined size distribution with average crystallite size of 11.7 nm. FE-SEM and TEM images visually supported the observed size range. The presence of plant-mediated phytochemicals on the surface of AgNPs was confirmed through DLS, FTIR, and TGA/DTA studies. To assess their antidiabetic potential, rats were induced with streptozotocin, resulting in elevated levels of biochemical parameters associated with diabetes. Conversely, serum insulin levels (2.50 ± 0.55) and glucokinase activity (64.50 ± 8.66) decreased. However, treatment with AgNPs demonstrated a dose-dependent reduction in blood glucose, total protein, albumin, and HbA1c levels, effectively restoring them to normal ranges. Moreover, the treatment significantly increased insulin levels (7.55 ± 0.63) and glucokinase activity (121.50 ± 4.60), indicating the antidiabetic potential of V. maderaspatana-mediated AgNPs. Notably, the exitance of phytochemicals, like flavonoids and phenols, on the surface of AgNPs facilitated their ability to neutralize reactive oxygen species (ROS) through electron donation. This property enhanced their overall antidiabetic efficiency.
Collapse
Affiliation(s)
- Karuppannan P
- PG & Research Department of Zoology, Vivekanandha College for Women, Thiruchengodu, Tamilnadu, India
| | - Saravanan K
- PG and Research Department of Zoology, Nehru Memorial College (Autonomous), Puthanampatti, Thiruchirappalli, Tamilnadu, India
| | - Ashokkumar M
- Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamilnadu, India
| | - Chukwuebuka Egbuna
- Department of Biochemistry, Faculty of Natural Sciences, Chukwuemeka Odumegwu Ojukwu University, Igbariam, Nigeria
| |
Collapse
|
3
|
Lakshmanan G, Altemimi AB, Sivaraj C, Selvakumari J, Karthik L, Saravanan K, Viswanathan V, Pandian A, Cacciola F, Rashad Ali M, Najm MAA, Gamal Abedelmaksoud T. Imperatorin from the aerial parts of Cleome viscosa L.: a characterization study and evaluation of the antibacterial activity. Nat Prod Res 2024; 38:848-855. [PMID: 36987594 DOI: 10.1080/14786419.2023.2190116] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 03/07/2023] [Indexed: 03/30/2023]
Abstract
Cleome viscosa L., a member of the family Cleomaceae, is a potential medicinal plant, known for several bioactive properties such as: anticancer, antidiabetic, antioxidant, anti-inflammatory, antimicrobial, wound healing, etc. Our study aimed to isolate a bioactive compound and assess its antibacterial activity. The crystal compound imperatorin was isolated and reported for the first time from the aerial parts of C. viscosa. The isolation was made using silica gel (100-200 mesh) column chromatography. The structure of imperatorin was investigated through single-crystal XRD, unit cell molecules, FTIR, and ESI-MS spectral analysis. The results validated imperatorin's triclinic crystal structure and P2i/c distance group. The electronic structure was also calculated (4.28/6.21 D) along with the frontier molecular orbital, dipole moment, atomic charges, and electrostatic map of particles in gaseous stage and active site. Imperatorin showed highest activity at 40 µg/mL concentration against Gram + ve bacteria: Staphylococcus aureus (3 ± 0.2 mm), Bacillus subtilis (3 ± 0.6 mm), and Gram -ve bacteria: Klebsiella pneumoniae (3 ± 0.2 mm), Escherichia coli (5 ± 0.2 mm). The study highlights that the compound can be isolated in larger quantities as the plant is easily available across the tropics.
Collapse
Affiliation(s)
- Govindan Lakshmanan
- Centre for Advanced Studies in Botany, University of Madras, Chennai, India
- Department of Anatomy, Saveetha Medical College and Hospital, Institute of Medical and Technical Sciences, Chennai, Tamil Nadu, India
| | - Ammar B Altemimi
- Department of Food Science, College of Agriculture, University of Basrah, Basrah, Iraq
- College of Medicine, University of Warith Al-Anbiyaa, Karbala, Iraq
| | - C Sivaraj
- Phytochemistry and Natural Product, ARMATS Biotek Training and Research Institute, Chennai, India
| | - Jeyaperumal Selvakumari
- Directorate of Health & Family Welfare Services, Integrated Disease Surveillance Program, Puducherry, India
| | - L Karthik
- Central Research Laboratory, ToxiVen Biotech Private Limited, Kovaipudur, Tamil Nadu, India
| | - K Saravanan
- Department of Physics, Periyar University, Salem, Tamil Nadu, India
| | - Vijay Viswanathan
- Department of Biophysics, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Arjun Pandian
- Department Research and Innovation, Institute of Biotechnology, Saveetha School of Engineering (SSE), Saveetha Institute of Medical and Technical Sciences (SIMATS), Chennai, Tamil Nadu, India
| | - Francesco Cacciola
- Department of Biomedical, Dental, Morphological and Functional Imaging Sciences, University of Messina, Messina, Italy
| | - Marwa Rashad Ali
- Food Science Department, Faculty of Agriculture, Cairo University, Giza, Egypt
| | - Mazin A A Najm
- Pharmaceutical Chemistry Department, College of Pharmacy, Al-Ayen University, Thi-Qar, Iraq
| | | |
Collapse
|
4
|
Revathi G, Elavarasi S, Saravanan K, Ashokkumar M, Egbuna C. Greater efficiency of polyherbal drug encapsulated biosynthesized chitosan nano-biopolymer on diabetes and its complications. Int J Biol Macromol 2023; 240:124445. [PMID: 37060982 DOI: 10.1016/j.ijbiomac.2023.124445] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 11/24/2022] [Revised: 03/21/2023] [Accepted: 04/10/2023] [Indexed: 04/17/2023]
Abstract
Diabetes is a highly complex disease that has an adverse impact on the lives of individuals, and the current medicines used to manage diabetes have obvious side effects. Medicinal plants, on the other hand, may serve as an alternate source of anti-diabetic drugs. A polyherbal combination has a higher and more extensive therapeutic potential than a single herb. Yet, due to deterioration during the absorption process, the usage of this drug still yields inadequate results. Encapsulation of polyherbal drug with chitosan nanoparticles is one of the key ways to solve this problem due to its biocombatibilty, slow and targeted drug delivery characteristics. In the present study, the chitosan was derived from prawn shell and the chitosan nanoparticles had been prepared by ionic-gelation method. The anti-diabetic polyherbal drug (Andrographis paniculata, Andrographis alata, Adhatoda zeylanica, Gymnema sylvestre, Syzygium cumini, and Justicia glabra) was encapsulated with a bio-derived chitosan biopolymer. The drug loading efficiency was about 85 %. The chemical and physical properties of the chitosan and drug-loaded chitosan nanoparticles had been analyzed by FT-IR absorption, XRD, SEM, TEM and EDAX analysis. The antidiabetic efficiency, hepatoprotective activity and antihyperlipedimic activity of the chitosan nanoparticles, polyherbal drug and polyherbal drug encapsulated with chitosan nanoparticles were assessed in a group of rats. The polyherbal drug reduced the serum glucose level from 306.4 mg/dL to 134.47 mg/dL, while the polyherbal drug encapsulated with chitosan nanoparticles reduced to 127.017 mg/dL. This was very close to the serum glucose level of non-diabetic rat (124.65 mg/dL). Further, it considerably increased the insulin level close to that of non-diabetic rat. Thus, the polyherbal drug encapsulated with chitosan nanoparticles showed superior efficiency in antidiabetic and also diabetic complications.
Collapse
Affiliation(s)
- G Revathi
- PG and Research Dept. of Zoology, Nehru Memorial College (Autonomous), Puthanampatti, Thiruchirappalli, Tamilnadu, India
| | - S Elavarasi
- PG and Research Dept. of Zoology, Holy Cross College (Autonomous), Thiruchirappalli, Tamilnadu, India
| | - K Saravanan
- PG and Research Dept. of Zoology, Nehru Memorial College (Autonomous), Puthanampatti, Thiruchirappalli, Tamilnadu, India
| | - M Ashokkumar
- Department of Physics, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Thandalam, Chennai 602 105, India.
| | - Chukwaebuka Egbuna
- Department of Biochemistry, Faculty of Natural Sciences, Chukwuemeka Odumegwu Ojukwu University, Nigeria
| |
Collapse
|
5
|
Kiruba-Sankar R, Haridas H, Pandey SK, George Z, Saravanan K, Gladston Y, Praveenraj J, SM A. The Nicobarese tribes and their coastal fishing activities during the COVID-19 pandemic-related restrictions- preliminary findings. J Coast Conserv 2023; 27:11. [PMID: 36915700 PMCID: PMC9996549 DOI: 10.1007/s11852-023-00942-2] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
We interviewed the Nicobarese tribal community (N = 95) of Car Nicobar Island situated in the Andaman and Nicobar archipelago, India to analyze the impact of COVID-19-related restrictions on their coastal fishing activities. Our surveys revealed a significant reduction (p < 0.001) in the average monthly income and fish catches during pre and post-COVID-19 scenarios. Constraints faced during the pandemic-related restrictions and the possible solutions to reinforce the fishing activities were highlighted for sustainable resource management in Car Nicobar Island.
Collapse
Affiliation(s)
- R. Kiruba-Sankar
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| | - Harsha Haridas
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| | - Sanjay Kumar Pandey
- ICAR- Krishi Vigyan Kendra (KVK), Car Nicobar Island, Andaman and Nicobar Islands India
| | - Zachariah George
- ICAR- Krishi Vigyan Kendra (KVK), Car Nicobar Island, Andaman and Nicobar Islands India
| | - K. Saravanan
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| | - Y. Gladston
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| | - J. Praveenraj
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| | - Ajina SM
- ICAR- Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands India
| |
Collapse
|
6
|
Balasubadra K, Umamageswaran J, Saravanan K. IoT based Chronic Obstructive Pulmonary Lung Disease Patient Management System using Air Quality. CM 2023. [DOI: 10.18137/cardiometry.2023.26.604608] [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
Smoking is primarily responsible for the development of chronically obstructing pulmonary disease (COPD), a breathing condition that is treatable and preventable. One of the environmental challenges that cannot be ignored is air pollution. Extended exposed to contamination slows or harms the treatment of the lungs in COPD patients. Air quality, temperature, humidity, and dusty density tracking are given top priority during the product's development. Because Bronchitis is a disease that may be treated, air quality is essential.The major objective of this research is to develop a method for monitoring air quality that will alert patients to it and promote awareness. This product will assess how COPD patients are affected by exposure to poor air quality. A model mobile device that continually monitors ventilation rate, breathing rate, physically activity, nap quality, the possibility of respiratory problems, and the degree of distress and tiredness was developed in order to fulfil this unmet need. The information stored by this gadget would be accessible from portable devices all around the world via a safe central server.
Collapse
|
7
|
Umamageswaran J, Saravanan K, Srinivasan V. Intelligent Technique for Stress Level Management for IT Employees in the Work from Home Environment using IoT Technology. CM 2023. [DOI: 10.18137/cardiometry.2023.26.618622] [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
Working from home (WFH) online has raised stress during the COVID-19 epidemic. According to recent studies, the crisis has an impact on students and online employees. The body's natural reaction to both internal and external stimuli is stress. Even while stress is common, working online for an extended period of time can lead to major health problems if nothing is done to manage it. In our study, the most effective variables that are related to the stress level of online employees have been carefully examined.According to the results, our system as a whole was capable of generating outputs with an accuracy of more than 70%. It will offer the most precise forecasts for averting health problems. Our main goal is to give online workers the tools they need to live healthy lifestyles. Based on the comments we get from users in the future, we'll update users. In the future, our technology will be a very practical tool for online employees.
Collapse
|
8
|
Kavitha R, Jothi DK, Saravanan K, Swain MP, Gonzáles JLA, Bhardwaj RJ, Adomako E. Ant Colony Optimization-Enabled CNN Deep Learning Technique for Accurate Detection of Cervical Cancer. Biomed Res Int 2023; 2023:1742891. [PMID: 36865486 PMCID: PMC9974247 DOI: 10.1155/2023/1742891] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 10/03/2022] [Accepted: 02/07/2023] [Indexed: 02/23/2023]
Abstract
Cancer is characterized by abnormal cell growth and proliferation, which are both diagnostic indicators of the disease. When cancerous cells enter one organ, there is a risk that they may spread to adjacent tissues and eventually to other organs. Cancer of the cervix of the uterus often initially manifests itself in the uterine cervix, which is located at the very bottom of the uterus. Both the growth and death of cervical cells are characteristic features of this condition. False-negative results provide a significant moral dilemma since they may cause women to get an incorrect diagnosis of cancer, which in turn can result in the woman's premature death from the disease. False-positive results do not raise any significant ethical concerns; but they do require a patient to go through an expensive and time-consuming treatment process, and they also cause the patient to experience tension and anxiety that is not warranted. In order to detect cervical cancer in its earliest stages in women, a screening procedure known as a Pap test is often performed. This article describes a technique for improving images using Brightness Preserving Dynamic Fuzzy Histogram Equalization. To individual components and find the right area of interest, the fuzzy c-means approach is applied. The images are segmented using the fuzzy c-means method to find the right area of interest. The feature selection algorithm is the ACO algorithm. Following that, categorization is carried out utilizing the CNN, MLP, and ANN algorithms.
Collapse
Affiliation(s)
- R. Kavitha
- Sri Ram Nallamani Yadava Arts and Science College, Manonmaniam Sundaranar University, Tirunelveli, India
| | - D. Kiruba Jothi
- Department of Information Technology, Sri Ram Nallamani Yadava college of Arts and Science, Manonmaniam Sundaranar University, Tirunelveli, India
| | - K. Saravanan
- Department of Information Technology, R.M.D. Engineering College, Chennai, India
| | - Mahendra Pratap Swain
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi, India
| | | | - Rakhi Joshi Bhardwaj
- Department of Computer Engineering, Vishwakarma Institute of Technology, Savitribai Phule Pune University, Pune, India
| | | |
Collapse
|
9
|
Shankar SM, David Stephen A, Pitchumani Violet Mary C, Madhukar H, Dege N, Kahveci Yagcl N, Saravanan K, Nidhin PV, Maruthamuthu S. Validation of crystal structure of 2-acetamidophenyl acetate: an experimental and theoretical study. J Biomol Struct Dyn 2022; 40:13233-13245. [PMID: 34606422 DOI: 10.1080/07391102.2021.1984310] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In this present study, we have determined the crystal structure of 2-acetamidophenyl acetate (2-AAPA) commonly used as influenza neuraminidase inhibitor, to analyze the polymorphism. Molecular docking and molecular dynamics have been performed for the 2-AAPA-neuraminidase complex as the ester-derived benzoic group shows several biological properties. The X-ray diffraction studies confirmed that the 2-AAPA crystals are stabilized by N-H···O type of intermolecular interactions. Possible conformers of 2-AAPA crystal structures were computationally predicted by ab initio methods and the stable crystal structure was identified. Hirshfeld surface analysis of both experimental and predicted crystal structure exhibits the intermolecular interactions associated with 2D fingerprint plots. The lowest docking score and intermolecular interactions of 2-AAPA molecule against influenza neuraminidase confirm the binding affinity of the 2-AAPA crystals. The quantum theory of atoms in molecules analysis of these intermolecular interactions was implemented to understand the charge density redistribution of the molecule in the active site of influenza neuraminidase to validate the strength of the interactions.Communicated by Ramaswamy H. Sarma.
Collapse
Affiliation(s)
- S M Shankar
- Department of Physics, PSG Institute of Technology and Applied Research, Coimbatore, Tamil Nadu, India
| | - A David Stephen
- Department of Physics, PSG College of Arts and Science, Coimbatore, Tamil Nadu, India
| | - C Pitchumani Violet Mary
- Department of Physics, Sri Shakthi Institute of Engineering and Technology, Coimbatore, Tamil Nadu, India
| | - Hemamalini Madhukar
- Department of Chemistry, Mother Teresa Women's University, Kodaikanal, Tamil Nadu, India
| | - Necmi Dege
- Department of Physics, Ondokuz Mayis University, Samsun, Turkey
| | | | - K Saravanan
- Faculty of Chemistry, University of Warsaw, Poland
| | - P V Nidhin
- Department of Physics, Safa Arts and Science College, Kerala, India
| | - S Maruthamuthu
- Department of Physics, PSG Institute of Technology and Applied Research, Coimbatore, Tamil Nadu, India
| |
Collapse
|
10
|
Tiwari B, Pandey P, G V, K S. Various Techniques and Outcomes of Arterial Anastomosis in Live Renal Transplant: An Institutional Experience. Cureus 2022; 14:e25262. [PMID: 35755546 PMCID: PMC9224832 DOI: 10.7759/cureus.25262] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/23/2022] [Indexed: 12/02/2022] Open
Abstract
Introduction Renal transplantation with multiple arteries is associated with a major index of surgical complications. Relevant papers and meta-analyses have shown relatively more vascular and urological complications in transplant of donor kidneys with multiple arteries. In live donor grafts due to the unavailability of a carrel patch, several techniques for bench and in situ reconstruction have been described in order to reduce the incidence of these vascular complications. In this study, the short and long-term results of living donor kidney transplants with multiple renal arteries (MRAs) versus single renal artery (SRA) were compared retrospectively. Methods This is a retrospective study done on patients who received a living donor kidney between January 2012 and January 2018 at the Institute of Urology, Madras Medical College, Chennai. We have excluded deceased donor kidney transplants and ABO-incompatible cases done in the same time period. The study was approved by the Institutional Ethics Committee (Approval No: IES-MMC-008) and performed in accordance with the guidelines of the Declaration of Helsinki. Open live donor nephrectomy was performed through an extra-peritoneal flank incision in all cases. In the SRA group, the renal artery was anastomosed end to end to the Internal iliac artery, while the renal vein was anastomosed to the external iliac vein in the end to side fashion. Urinary tract reconstruction was accomplished by the Gregoir technique in both groups. We looked at recipient complications, baseline and postoperative serum creatinine, total ischemia time, mean operating time, and short- and long-term graft and patient survival as postoperative outcomes. Results In a six-year period (2012-2018) at our institute, 256 living donor transplantations were performed; 36 (14%) kidneys had two or more renal arteries which were anastomosed using various techniques. Cold ischemia time was relatively longer in the MRA group (45 mins vs 28 mins in the SRA group) (p-value <0.05). while warm ischemia time was comparable in both groups (2.5 vs 2.9 mins) serum creatinine was comparable in both groups at the 30th postoperative day (1.4 in SRA group vs 1.2 in MRA group) (p-value >0.05). Incidence of surgical complications in SRA and MRA groups was: vascular - 3.6% and 2.7%; urological - 3.2% and 2.7%; the incidence of lymphocele was 4.5% and 5.5% and delayed graft function 4.5% and 5.5% respectively. Conclusion Multiple renal arteries are no longer a relative contraindication with advanced surgical techniques. in renal grafts with multiple arteries, all techniques of vessel anastomosis are comparable in terms of post-surgical complications.
Collapse
|
11
|
Vinnarasi F, Srinivasamoorthy K, Saravanan K, Rajesh Kanna A, Gopinath S, Prakash R, Ponnumani G, Babu C. Hydrogeochemical characteristics and risk evaluation of potential toxic elements in groundwater from Shanmughanadhi, Tamilnadu, India. Environ Res 2022; 204:112199. [PMID: 34673025 DOI: 10.1016/j.envres.2021.112199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 09/29/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Hydrogeochemical and Health Risk Assessments of trace elements are integral to groundwater resource assessment, utilization, and human health. Investigation of groundwater chemistry and trace elemental impact on local inhabitants were attempted in Shanmuganadhi basin, Tamilnadu, India. About 60 groundwater samples were collected during the pre-monsoon period and analyzed for hydrochemical composition, including major and trace elements (Fe, Cr, Ni, Cu Pb, Mn, and As) to isolate chemical characteristics and human health risk assessment. Groundwater geochemistry is prejudiced by geochemical reactions uniting cation exchange, dissolution and precipitation, adsorption, and anthropogenic contributions. About thirty-two percent of groundwater samples recorded higher F-(>1.5 mg/L) than the prescribed limit suggests sources from rock weathering and silicate dissolution. Nitrates (>45.0 mg/L) suggest sources from agricultural influences. Water types indicate alkalis (Na+ + K+) dominating alkali earth (Ca2+ - Mg2+) and strong acids (Cl- and SO42-) looming weak acid (CO32- and HCO3-) irrespective of water samples. The geochemical stability diagram suggests precipitation of silica, carbonate, and magnesium and dissolution of sulphate minerals along the groundwater flow path. Significant correlation between major ions and trace elements (Pb, Mn, Ni, and Cu) suggests origin from rock weathering, human impacts, and cultivation practices. Non-carcinogenic human risk for trace elements was higher in children compared with adults via ingestion and dermal exposure. The carcinogenic result suggests that Cr in CHK (7.1 × 10-2) and HBG (4.3 × 10-2) have the most excellent chance of cancer risk. The environmental risk category attempted using Comprehensive risk factor (CRI) suggests Pb (3.2-CHK, 2.6-HBG) with potential cancer risk. The comprehensive evaluation index recommends environmental damage between mild to moderate, indicating continuous exposure of traceable elements might result in cancer cause to the inhabitants. The study suggests water quality seems to be prejudiced by various geological and anthropogenic causes and endorses counteractive measures and proper execution of existing laws to protect groundwater resources in the study area.
Collapse
Affiliation(s)
- F Vinnarasi
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India.
| | - K Srinivasamoorthy
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - K Saravanan
- Soil Mechanics Lab, Department of Civil Engineering, Indian Institute of Science, Bangalore, 560 012, India
| | - A Rajesh Kanna
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - S Gopinath
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - R Prakash
- Geological Oceanography Division, CSIR- National Institute of Oceanography, Dona Paula, 403 004, Goa, India
| | - G Ponnumani
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - C Babu
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| |
Collapse
|
12
|
Pattanayak P, Saravanan K. Synthesis and Biological Activity of Some Novel Metronidazole Derivatives Containing a 1,3,4-Thiadiazole Schiff Base Moiety. Russ J Org Chem 2022. [DOI: 10.1134/s1070428022010146] [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: 11/23/2022]
|
13
|
Kiruba-Sankar R, Saravanan K, Haridas H, Praveenraj J, Biswas U, Sarkar R. Policy framework and development strategy for freshwater aquaculture sector in the light of COVID-19 impact in Andaman and Nicobar archipelago, India. Aquaculture 2022; 548:737596. [PMID: 34720238 PMCID: PMC8536500 DOI: 10.1016/j.aquaculture.2021.737596] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 05/17/2023]
Abstract
The present study was aimed at understanding the impact of COVID-19 pandemic related restrictions on the freshwater aquaculture sector of Andaman and Nicobar archipelago (ANI). We interviewed the freshwater fish farmers (N = 211) covering all the three districts (North and Middle, South Andaman, Nicobar district) of the archipelago. The results revealed the critical issues faced by the stakeholders such as fish seed unavailability, limitations in feeding, insufficient logistical support, movement related restrictions, lack of inputs, manpower shortages, etc. as the important constraints during lockdown. Our surveys also revealed that there was a significant reduction in the income of the farmers post COVID-19 outbreak (p < 0.001). Possible reform strategies that could promote the sector development and resilience were outlined to recover from the COVID-19 impacts. The study also highlights the significance of effective networking among the stakeholders and necessary preparedness measures to be undertaken by the fish farmers to deal with the exigencies. The study also recommends a policy framework to strengthen the planning and management of freshwater aquaculture sector towards the path of sustainability.
Collapse
Affiliation(s)
- R Kiruba-Sankar
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - K Saravanan
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Harsha Haridas
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - J Praveenraj
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Utpal Biswas
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Ritika Sarkar
- ICAR- Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| |
Collapse
|
14
|
Chen H, Yu L, Saravanan K, Li Y, Ma X, Wen Z, Li Y. N-doped carbon nanotube encapsulated cobalt for efficient oxidative esterification of 5‑hydroxymethylfurfural. REACT CHEM ENG 2022. [DOI: 10.1039/d1re00542a] [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: 11/21/2022]
Abstract
The cobalt nanoparticles embedded into graphitic nitrogen-rich carbon nanotube (Co/GCN) was prepared with a facile method and employed as an efficient catalyst for oxidative esterification of 5-hydroxymethylfurfural (HMF). The introduction...
Collapse
|
15
|
Kalpande S, Saravanan PR, Saravanan K. Study of factors influencing the encrustation of indwelling catheters: prospective case series. Afr J Urol 2021. [DOI: 10.1186/s12301-021-00139-9] [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
Abstract
Background
Long-term catheterisation is frequently necessary for patients with retention of urine or intractable incontinence who are unfit for definitive treatment or being evaluated for definitive treatment. In this study, the important factors influencing the encrustation of indwelling catheters are analysed.
Methods
A total of 52 patients on catheter drainage for a period ranging from 1 month to 1 year were taken in the study. Patients reported either for problems like catheter block or routine changing of catheter. The catheters were removed, and encrustation was subjected to chemical analysis. Urine was examined for pH, specific gravity, culture sensitivity and appearance. Blood samples were taken for estimation of calcium, phosphorus and uric acid.
Results
Out of 52 patients, 28 with urea splitting and 15 with non-urea splitting had positive urine culture (43 out of 52). Amongst 28, 27 (96%) had encrustation compared to 10 (50%) out of 15 with non-urea splitting bacteria (p value < .05). Amongst 24 patients having pH > 6, 22 (92%) had encrustation (p value < .05). The encrustation was found to be more common in bedridden patients (91%) when compared to physically active patients (54%) (p value < .05). The encrustation was more common in patients having single catheter for more than 15 days (86%) when compared to patients having catheter for shorter period (43%) (p value < .05).
Conclusion
This study showed definitive influence of the following factors in encrustation formation: infection with urea splitting organism, alkaline pH, physical activity of patient and duration of keeping a particular catheter.
Collapse
|
16
|
Reddy PA, Saravanan K, Madhukar A. A Study to Evaluate the Quality of Life of Patients with Diabetes Mellitus. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i47b33157] [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: 11/09/2022]
Abstract
Aim: The aim of the study was to evaluate the QOL of patients with Diabetes Mellitus.
Study Design: This was a prospective, observational study.
Duration of Study: The study was conducted from August 2019 to January 2021 in Yashoda Hospital, Hyderabad.
Methodology: Patients of either sex with ≥1year history of diabetes willing to give the consent were included in the study. Patients of either sex with <1year history of DM, Pregnant/lactating women and patients not willing to give the consent were excluded from the study. Data on Blood glucose levels (FBS, PPBS) and HbA1C was also obtained and assessed. QOLID questionnaire was administered to the patients and assessed which consisted of a set of 34 items representing 8 domains such as Role limitation due to the physical health, Physical endurance, General health, Treatment satisfaction, Symptom botherness, Financial worries, Mental health, and Diet satisfaction).
Results: A total of 200 patients were analysed in the study,108(54%) were males and 92(46%) were females. The average age of the patients was 58.5 years with majority being 51-70years (73.5%) of age. Patients with higher age and females had poor QOL compared to others. The correlation between various categorical variables with that of scores of QOL in various domains was assessed, Age of the patients influenced QOL score in various domains like RLPH (p value-0.038), PE (p value-0.0183), and SB (p value-0.0002), Gender has influenced QOL score in domains like RLPH (p value-0.0008), PE (p value-0.0106), TS (p value-0.0005) and Educational Qualification has influenced QOL score in RLPH (p value-0.0008), GH (p value-<0.0001), TS (p value-<0.0001), E/MH (p value-<0.0001).
Conclusion: The results concluded that overall QOL was noticeably low in Diabetic patients especially in Women and elderly thus indicating that Diabetes management is not restricted to treatment but also requires attention on QOL of patients.
Collapse
|
17
|
Saravanan K, Kiruba-Sankar R, Khan MJ, Hashmi AS, Velmurugan A, Haridas H, Prakasan S, Deepitha RP, Laxmi MNV. Baseline assessment of marine debris with soil, sediment, and water quality characteristics from the fish landing centres of South Andaman, Andaman archipelago, India. Mar Pollut Bull 2021; 172:112879. [PMID: 34464820 DOI: 10.1016/j.marpolbul.2021.112879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/11/2021] [Accepted: 08/16/2021] [Indexed: 06/13/2023]
Abstract
The present study investigates the issue of marine debris and the associated soil, sediment, water quality, and microbial load from the fish landing centres (Junglighat, Chatham, Wandoor, and Guptapara) of South Andaman. The results revealed that significantly (P < 0.05) higher number and weight of marine debris was found in urban landing centres such as Chatham (21.26 ± 1.03 numbers/m2) and Junglighat (268.16 ± 27.00 g/m2), respectively. Plastic debris was found to be the most abundant type of debris, among which plastic bags were dominant. Better soil, sediment, and water quality parameters were observed in rural landing centres such as Wandoor and Guptapara, whereas microbial load was found to be higher in urban landing centres. The study recommends the imperative need to generate awareness on better management practices among the stakeholders to deal with the issue of marine debris and to aim sustainable management of the coastal environment.
Collapse
Affiliation(s)
- K Saravanan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - R Kiruba-Sankar
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India.
| | - Md Junaid Khan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Aqsa Siraj Hashmi
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - A Velmurugan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - Harsha Haridas
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India; ICAR-Central Institute of Fisheries Education, Powarkheda Research Centre, Hoshangabad 461110, Madhya Pradesh, India
| | - Sreepriya Prakasan
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - R P Deepitha
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| | - M Naga Venkat Laxmi
- ICAR-Central Island Agricultural Research Institute, Port Blair 744105, Andaman and Nicobar Islands, India
| |
Collapse
|
18
|
Mathew MK, Saravanan K, Abraham S. Utilization Pattern of Indian Traditional Medicine in the Treatment of Cancer. JPRI 2021. [DOI: 10.9734/jpri/2021/v33i34a31833] [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: 11/09/2022]
Abstract
Aim: The aim of this study was to find the utilization pattern of Indian traditional medicine systems among the cancer patients.
Study Design: The present study is an observation cross-section design and conducted among the patients visiting in a hospital practicing Indian Traditional Medicine system from January2019 – December 2019.
Methodology: 379 cancer patients were participated in this study and required information were collected using a descriptive semi-structured questionnaire.
Results: The result implies that ITMS is widespread in cancer patients with 86.28% treating with selected form of ITS. A mixed group of 341 remedy was recognized and practiced. Ayurveda, Siddha, Homeopathy, Unani as well as Yoga and nutrition was the very frequently prescribed ITMS remedies. Herbal medicine use tripled from use prior to detection of cancer. Multivariate analysis showed that the usage patterns of the ITMS patients were belong to the adult populations and female. The source of information was mainly from friends/ family and the media, while directions from allopathic doctors and nurses were very negligible in giving ITMS related suggestions. 82.06% of patients used ITMS in order to improve the immunity to fight against cancer and/ or increase physical well-being. 88.92% of patients have gained from ITMS. 10.03% of patients reported minor side effects.
Conclusion: From the findings of the present, that the healthcare professionals can investigate the use of ITMS with cancer patients. The patients have shown strong attraction towards the ITM system due to less side effects and comparatively treatment cost is less though the efficacy and safety are yet to be explored many therapy regimens. The patients can be counselled regarding its potential benefits of ITMS remedies with the restricted existing effectiveness and for the improvement of patients.
Collapse
|
19
|
Ranjithkumar R, Saravanan K, Balaji B, Hima S, Sreeja S, Timane SR, Ram Pravin Kumar M, Kabilan S, Ramanathan M. Novel daidzein molecules exhibited anti-prostate cancer activity through nuclear receptor ERβ modulation, in vitro and in vivo studies. J Chemother 2021; 33:582-594. [PMID: 34060437 DOI: 10.1080/1120009x.2021.1924935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Eight novel ERβ selective daidzein analogues (NCE1-8) were synthesized and their anti-cancer activity was evaluated by in vitro and in vivo methods. Cytotoxicity study, Receptor binding studies, Luciferase assay, cMYC & Cyclin D1 expression and Caspase 3, 8 & 9 activities were measured to ascertain the anticancer activity and mechanism. Uterotropic, anti-androgenic and anti-tumour activities were performed in rodents. The results revealed that NCEs produced anti-prostate cancer activity in DU145, LNCaP and PC3 cell lines and 50% more active than genistein. NCEs was significantly down-regulated cMYC & Cyclin D1 genes and elevated caspase 3 & 9 levels and did not show any difference in uterotropic, anti-androgenic activities. The tumour weight was also reduced. The NCE 1 and 2 have shown ERβ selectivity in receptor binding studies. Daidzein with methyl substitution at R or R1 position exhibited more ERβ selectivity and could be considered as lead molecules for anti-prostate cancer activity.
Collapse
Affiliation(s)
- R Ranjithkumar
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| | - K Saravanan
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalai Nagar, Tamil Nadu, India
| | - B Balaji
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| | - S Hima
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - S Sreeja
- Cancer Research Program, Rajiv Gandhi Centre for Biotechnology, Thiruvananthapuram, Kerala, India
| | - S R Timane
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| | - M Ram Pravin Kumar
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| | - S Kabilan
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalai Nagar, Tamil Nadu, India
| | - M Ramanathan
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| |
Collapse
|
20
|
Iyer S, Velmurugan T, Gandomi AH, Noor Mohammed V, Saravanan K, Nandakumar S. Structural health monitoring of railway tracks using IoT-based multi-robot system. Neural Comput Appl 2021. [DOI: 10.1007/s00521-020-05366-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
21
|
Praveenraj J, Uma A, Saravanan K, Rebecca G, Mandal CK. Outbreak of hirudiniasis in aquarium-reared albino red-bellied pacu Piaractus brachypomus. Dis Aquat Organ 2021; 144:55-59. [PMID: 33704092 DOI: 10.3354/dao03569] [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] [Indexed: 06/12/2023]
Abstract
We report hirudiniasis caused by the leech Hemiclepsis marginata asiatica Moore, 1924 in albino red-bellied pacu (pirapitinga) Piaractus brachypomus (Cuvier, 1818), constituting the first documentation of a freshwater fish species being affected in India. The outbreak occurred in a tank of an aquarium-fish retailer; infested fish appeared asphyxiated, unable to swim or swimming upside down, with cloudy eyes and body with thick mucus secretion. The prevalence and mortality was 100%, with a mean intensity of 81 leeches per fish. The histopathology of the morbid fish revealed degenerative necrosis, eosinophilic infiltration in the muscle tissue and haemorrhages in the fin membrane. The leech mitochondrial 18S rDNA and 12S rDNA genes were characterised and submitted to GenBank under accession numbers MN380443 (18S) and MK733282 (12S). A maximum likelihood tree was constructed using 12S rDNA gene sequences to demonstrate the phylogenetic position of Hemiclepsis marginata asiatica among its congeners.
Collapse
Affiliation(s)
- J Praveenraj
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105, India
| | | | | | | | | |
Collapse
|
22
|
Vinnarasi F, Srinivasamoorthy K, Saravanan K, Gopinath S, Prakash R, Ponnumani G, Babu C. Chemical weathering and atmospheric carbon dioxide (CO 2) consumption in Shanmuganadhi, South India: evidences from groundwater geochemistry. Environ Geochem Health 2021; 43:771-790. [PMID: 32095933 DOI: 10.1007/s10653-020-00540-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 02/12/2020] [Indexed: 06/10/2023]
Abstract
Chemical weathering in a groundwater basin is a key to understanding global climate change for a long-term scale due to its association with carbon sequestration. The present study aims to characterize and to quantify silicate weathering rate (SWR), carbon dioxide consumption rate and carbonate weathering rate (CWR) in hard rock terrain aided by major ion chemistry. The proposed study area Shanmuganadhi is marked with superior rainfall, oscillating temperature and runoff with litho-units encompassing charnockite and hornblende-biotite gneiss. Groundwater samples (n = 60) were collected from diverse locations and analysed for major chemical constituents. Groundwater geochemistry seems to be influenced by geochemical reactions combining dissolution and precipitation of solids, cation exchange and adsorption along with minor contribution from anthropogenic activities. The SWR calculated for charnockite and hornblende-biotite gneiss was 3.07 tons km-2 year-1 and 5.12 tons km-2 year-1, respectively. The calculated CWR of charnockite and hornblende-biotite gneiss was 0.079 tons km-2 year-1 and 0.74 tons km-2 year-1, respectively. The calculated CO2 consumption rates via silicate weathering were 1.4 × 103 mol km-2 year-1 for charnockite and 5.8 × 103 mol km-2 year-1 for hornblende-biotite gneiss. Lithology, climate and relief were the key factors isolated to control weathering and CO2 consumption rates.
Collapse
Affiliation(s)
- F Vinnarasi
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - K Srinivasamoorthy
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India.
| | - K Saravanan
- Soil Mechanics Lab, Department of Civil Engineering, Indian Institute of Science, Bangalore, 560012, India
| | - S Gopinath
- Institute of Geophysics, Universidad Nacional Autónoma de México, Mexico City, CP 04510, Mexico
| | - R Prakash
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - G Ponnumani
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| | - C Babu
- Hydrogeology Lab, Department of Earth Sciences, Pondicherry University, Puducherry, 605 014, India
| |
Collapse
|
23
|
L B, R S, K S, N A S. Groundwater vulnerability mapping using the modified DRASTIC model: the metaheuristic algorithm approach. Environ Monit Assess 2021; 193:25. [PMID: 33389229 DOI: 10.1007/s10661-020-08787-0] [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] [Received: 06/09/2020] [Accepted: 11/30/2020] [Indexed: 06/12/2023]
Abstract
Vulnerability assessment and mapping is a significant tool for sustainable management of the precious natural groundwater resources. DRASTIC is an extensively used index model to map groundwater vulnerable zones. However, the original DRASTIC model rates and weights used in most of the research depict the poor correlation between nitrate concentration and groundwater vulnerability index. Wilcoxon test and five population-based metaheuristic (MH) algorithms, namely, firefly algorithm (FA), invasive weed optimization (IWO), teaching learning-based optimization (TLBO), shuffled frog leaping algorithm (SFLA), and particle swarm optimization (PSO), were used to optimize the rates and weights of the DRASTIC model to improve its accuracy. The performance of all the employed metaheuristic algorithms converges to a global optimal solution at different iterations, and to choose the best algorithm for DRASTIC weights optimization, a ranking methodology was proposed. The algorithms were ranked by calculating the relative closeness of alternatives with computational speed and the number of iterations as attributes in the TOPSIS method. This study identifies FA as the outperforming algorithm among the employed for this specified weight optimization problem based on ranking. The result of the optimization model proposed depicts significant improvement in the correlation coefficient between the groundwater vulnerability index and nitrate concentration from 0.0545 for the original DRASTIC model to 0.7247 for the Wilcoxon-MH- DRASTIC. Hence, this ranking approach can be adopted when global optimal solution is found by all employed algorithms in DRASTIC weight optimization.
Collapse
Affiliation(s)
- Balaji L
- Centre for Water Resources, Anna University, Chennai, 600025, India.
| | - Saravanan R
- Centre for Water Resources, Anna University, Chennai, 600025, India
| | - Saravanan K
- Centre for Water Resources, Anna University, Chennai, 600025, India
| | | |
Collapse
|
24
|
Prakash R, Srinivasamoorthy K, Sundarapandian SM, Nanthakumar C, Gopinath S, Saravanan K, Vinnarasi F. Submarine Groundwater Discharge from an Urban Estuary to Southeastern Bay of Bengal, India: Revealed by Trace Element Fluxes. Arch Environ Contam Toxicol 2021; 80:208-233. [PMID: 33108482 DOI: 10.1007/s00244-020-00774-3] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 10/10/2020] [Indexed: 06/11/2023]
Abstract
Submarine groundwater discharge and associated trace element fluxes from the Coleroon River estuary to south bay, India, has been attempted, because increasing trace elements could result in harmful algal blooms and eutrophication. Trace elements (Al, Cr, Mn, Fe, Ni, Cu, Zn, Sr, Mo, Ba, Pb, Th, and U) in surface water, pore, and groundwater samples were monitored for 10 days in three locations (A, B, and C) by considering tidal fluctuations. The trace elements Al, Cr, Fe, Ni, Zn, Sr, Mo, Pb, Th, and U were greater and found to be influenced by processes, such as fresh groundwater discharge and seawater intrusion. Lower Mn, Cu, and Ba signifies impact due to sediment adsorption, mixing, and elemental exchange during fresh groundwater and seawater mixing. Salinity versus trace element plot infers greater trace element mobility with cumulative salinity influenced by the conformist behavior of freshwater, seawater, and mixing. The calculated submarine groundwater discharge supported dissolved trace elements fluxes were 107,047.8 n mol d-1 m-1 for location A, 183,520.2 n mol d-1 m-1 for location B, and 181,474.4 n mol d-1 m-1 for location C, respectively. Variations in dissolved trace elements fluxes are attributed to variations in pH, free redox environment in the aquifer, adsorption or desorption by sediments, and the environmental cycle of marine organisms.
Collapse
Affiliation(s)
- R Prakash
- Department of Earth Sciences, Pondicherry University, Puducherry, 605014, India.
- Department of Geology, Khajamalai Campus, Bharathidasan University, Trichy, 620 023, India.
| | - K Srinivasamoorthy
- Department of Earth Sciences, Pondicherry University, Puducherry, 605014, India
| | - S M Sundarapandian
- Department of Ecology and Environmental Sciences, Pondicherry University, Puducherry, 605014, India
| | - C Nanthakumar
- Department of Statistics, Salem Sowdeswari College, Salem, 636010, India
| | - S Gopinath
- Institute of Geophysics, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | - K Saravanan
- Department of Civil Engineering, Indian Institute of Sciences, Bangalore, 560 012, India
| | - F Vinnarasi
- Department of Earth Sciences, Pondicherry University, Puducherry, 605014, India
| |
Collapse
|
25
|
Vijayalakshmi K, Raghuram PH, Saravanan K, Krithika CL, Kannan A. Validity of 3-Tesla diffusion-weighted magnetic resonance imaging for distinction of reactive and metastatic lymph nodes in head-and-neck carcinoma. J Cancer Res Ther 2020; 16:587-593. [PMID: 32719272 DOI: 10.4103/jcrt.jcrt_55_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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Objectives The objective was to study the relationship of 3-Tesla (3T) diffusion-weighted magnetic resonance imaging (DW-MRI) with apparent diffusion coefficient (ADC) value for distinction of reactive and metastatic lymph nodes (LNs) in head-and-neck carcinoma (HNC) patients and to determine the ADC cutoff value for metastatic LNs at various levels. Materials and Methods 3T DW and T1- and T2-weighted imaging sequences were done in 34 patients with biopsy-proven primary HNC of 100 cervical LNs ≥1 cm in diameter. The mean ADC values were compared with histopathologically proven LNs using the independent t-test. ADC cutoff value was evaluated with sensitivity, specificity, accuracy, positive predictive value, negative predictive value and a receiver operating characteristic curve analysis. Results The mean ADC value of reactive LN was 1.2933 × 10-3 mm2/s and metastatic LN was 0.908 × 10-3 mm2/s. An ADC cutoff value was 0.868 × 10-3 mm2/s with 84% sensitivity, 96% specificity, 93% accuracy, 87.5% positive predictive value, and 94.7% negative predictive value. A significant difference in mean ADC value between reactive and metastatic LNs was noted (P< 0.001). Conclusion 3T DW-MRI is useful in differentiating reactive and metastatic cervical LNs in HNC patients. However, studies with larger sample size have to be performed to validate ADC threshold value with 3T DW-MRI in differentiating between reactive and metastatic LNs for clinical practice.
Collapse
Affiliation(s)
- K Vijayalakshmi
- Department of Oral Medicine and Radiology, SRM Dental College, Chennai, Tamil Nadu, India
| | - P H Raghuram
- Department of Oral Medicine and Radiology, SRM Dental College, Chennai, Tamil Nadu, India
| | - K Saravanan
- Department of Radio Diagnosis, Sri Balaji Medical College and Hospital, Chennai, Tamil Nadu, India
| | - C L Krithika
- Department of Oral Medicine and Radiology, SRM Dental College, Chennai, Tamil Nadu, India
| | - A Kannan
- Department of Oral Medicine and Radiology, SRM Dental College, Chennai, Tamil Nadu, India
| |
Collapse
|
26
|
Prakash R, Srinivasamoorthy K, Gopinath S, Saravanan K. Submarine groundwater discharge as sources for dissolved nutrient fluxes in Coleroon river estuary, Bay of Bengal, India. J Contam Hydrol 2020; 233:103660. [PMID: 32480099 DOI: 10.1016/j.jconhyd.2020.103660] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2019] [Revised: 04/02/2020] [Accepted: 05/22/2020] [Indexed: 06/11/2023]
Abstract
Groundwater contributed nutrients aided with increasing population threaten the global coastal ecosystems. In this study, attempt has been made using major ions and nutrients to evaluate the significance of submarine groundwater discharge (SGD) in a semi-arid estuary of south India. Surface, seepage and groundwater chemistry altered from fresh (NaK-CaMg-NO3Cl) to mixed (NaK-NO3Cl) to saline water (NaCl) type from upstream to outlet that connects Bay of Bengal. We predicted abundant nitrate (NO3-) along upstream and towards the bay due to application of fertilizers and aquaculture activities, respectively. Elevated ammonium (NH4+) observed in the recirculated groundwater/sea water suggests contribution from sea water intrusion and higher phosphate (PO43-) noted at the outer bay suggests sources from phosphatic nodules. Decreasing Redfield ratio towards the bay suggests anoxic aquifer condition due to salinization. The SGD driven nutrient fluxes were 40.0-47.0% for NO3-, 43.0-51.0% for NH4+ and 9.0-32.0% for PO43- from the total input fluxes. The estimated nutrient fluxes showed that NO3- and PO43- discharges to the sea due to SGD and NH4+ removed from the coast due to consumption by microorganisms that creates toxic algal blooms in the study area.
Collapse
Affiliation(s)
- R Prakash
- Department of Earth Sciences, Pondicherry University, Puducherry 605 014, India; Department of Geology, Khajamalai Campus, Bharathidasan University, Trichy 620 023, India.
| | - K Srinivasamoorthy
- Department of Earth Sciences, Pondicherry University, Puducherry 605 014, India
| | - S Gopinath
- Instituto de Geofísica, Universidad Nacional Autonoma de Mexico (UNAM), Mexico DF 04510, Mexico
| | - K Saravanan
- Department of Civil Engineering, Indian Institute of Science, Bengaluru 560012, India
| |
Collapse
|
27
|
Gopinath S, Srinivasamoorthy K, Saravanan K, Prakash R. Tracing groundwater salinization using geochemical and isotopic signature in Southeastern coastal Tamilnadu, India. Chemosphere 2019; 236:124305. [PMID: 31306975 DOI: 10.1016/j.chemosphere.2019.07.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 12/20/2018] [Revised: 07/02/2019] [Accepted: 07/04/2019] [Indexed: 06/10/2023]
Abstract
Attempt has been made to discriminate groundwater salinity causes along the east coast of India. A total of 122 groundwater samples (61/season) were collected for two diverse seasons (Pre Monsoon and Post Monsoon) and analyzed for physical and chemical components along with stable isotopes. The Piper diagram proposes samples along the coast predisposed by saltwater incursion. Ionic ratio plots recommend groundwater discriminatory by changing geochemical signatures. The statistical correlation suggests impact of saltwater incursion, anthropogenic and rock water interaction as sources for dissolved constituents in groundwater. The thermodynamic stability plot suggests higher silicate dissolution, weathering and ion exchange prompting water chemistry nevertheless of seasons. The δ18O and δ2H increases towards the sea suggesting enrichment attributed to the sea water influence and rainfall influences along the southwestern parts of the study area.
Collapse
Affiliation(s)
- S Gopinath
- Department of Earth Sciences, School of Physical, Chemical and Applied Sciences, Pondicherry University, Puducherry, 605 014, India.
| | - K Srinivasamoorthy
- Department of Earth Sciences, School of Physical, Chemical and Applied Sciences, Pondicherry University, Puducherry, 605 014, India.
| | - K Saravanan
- Department of Civil Engineering, Indian Institute of Science, Bengaluru, 560012, India.
| | - R Prakash
- Department of Earth Sciences, School of Physical, Chemical and Applied Sciences, Pondicherry University, Puducherry, 605 014, India.
| |
Collapse
|
28
|
Nakkeeran K, Saravanan K, Babu P, John R. Evaluation of bone regeneration in periapical osseous defects with and without platelet rich plasma, combined calcium sulfate and autologous bone graft – A comparative study. Journal of Stomatology, Oral and Maxillofacial Surgery 2019; 120:196-202. [DOI: 10.1016/j.jormas.2018.11.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/12/2018] [Accepted: 11/19/2018] [Indexed: 11/30/2022]
|
29
|
Saravanan K, Rajendran KV, Gireesh-Babu P, Purushothaman CS, Makesh M. Molecular characterization and expression analysis of secretory immunoglobulin M (IgM) heavy chain gene in rohu, Labeo rohita. Anim Biotechnol 2019; 31:413-425. [PMID: 31081447 DOI: 10.1080/10495398.2019.1612411] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Immunoglobulin M (IgM) is the major isotype among teleost immunoglobulins. The present study was aimed to explore IgM heavy chain gene and its expression profile in rohu. Full-length IgM heavy chain cDNA of rohu consisted of 1994 bp encoding a polypeptide of 576 amino acid residues including a leader peptide, variable (VH) and constant (CH1-CH2-CH3-CH4) domains confirming the secretory form of IgM. The sequence carries conserved residues such as cysteine, tryptophan and amino acid motifs like 'YYCAR' and 'FDYWGKGT-VTV-S'. The predicted 3 D model confirmed various domains of rohu IgM heavy chain. Phylogenetic tree analysis revealed that IgM heavy chain gene of rohu shared the same cluster with that of other cyprinid fishes. Tissue distribution analysis showed the predominant level of IgM heavy chain gene expression in kidney, spleen and intestine. IgM heavy chain gene expression in rohu kidney was found to be up-regulated and reached a maximum at 7 days post-challenge with Aeromonas hydrophila. These findings demonstrate the first report of full-length secretory IgM heavy chain gene in rohu. Besides, IgM heavy chain gene was highly expressed in major lymphoid tissues and bacterial challenge influenced its expression which further confirmed its role in the adaptive humoral immune response.
Collapse
Affiliation(s)
- K Saravanan
- ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India.,ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands, India
| | - K V Rajendran
- ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | - P Gireesh-Babu
- ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India
| | - C S Purushothaman
- ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India.,ICAR-Central Marine Fisheries Research Institute, Kochi, Kerala, India
| | - M Makesh
- ICAR-Central Institute of Fisheries Education, Mumbai, Maharashtra, India.,ICAR-Central Institute of Brackishwater Aquaculture, Chennai, India
| |
Collapse
|
30
|
Venkatesan T, Saravanan K, Ramkumar T. A Big Data Recommendation Engine Framework Based on Local Pattern Analytics Strategy for Mining Multi-Sourced Big Data. J Info Know Mgmt 2019. [DOI: 10.1142/s0219649219500096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Organisations that perform business operations in a multi-sourced big data environment are in imperative need to discover meaningful patterns of interest from their diversified data sources. With the advent of big data technologies such as Hadoop and Spark, commodity hardwares play vital role in the task of data analytics and process the multi-sourced and multi-formatted big data in a reasonable cost and time. Though various data analytic techniques exist in the context of big data, recommendation system is more popular in web-based business applications to suggest suitable products, services, and items to potential customers. In this paper, we put forth a big data recommendation engine framework based on local pattern analytics strategy to explore user preferences and taste for both branch level and central level decisions. The framework encourages the practice of moving computing environment towards the data source location and avoids forceful integration of data. Further it assists decision makers to reap hidden preferences and taste of users from branch data sources for an effective customer campaign. The novelty of the framework has been evaluated in the benchmark dataset, MovieLens100k and results clearly confirm the advantages of the proposal.
Collapse
Affiliation(s)
- T. Venkatesan
- Department of Computer Science, PRIST University, Thanjavur, Tamilnadu, India
| | - K. Saravanan
- Faculty of Computer Science, PRIST University, Thanjavur, Tamilnadu, India
| | - T. Ramkumar
- School of Information Technology & Engineering, VIT University, Vellore, Tamilnadu, India
| |
Collapse
|
31
|
Lakshmithendral K, Archana K, Saravanan K, Kabilan S, Selvanayagam S. Crystal structures of 3-meth-oxy-4-{[5-(4-meth-oxy-phen-yl)-1,3,4-oxa-diazol-2-yl]meth-oxy}benzo-nitrile and N-(4-{[5-(4-chloro-phen-yl)-1,3,4-oxa-diazol-2-yl]meth-oxy}phen-yl)acetamide. Acta Crystallogr E Crystallogr Commun 2018; 74:1919-1922. [PMID: 30574401 PMCID: PMC6281121 DOI: 10.1107/s2056989018016754] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 11/25/2018] [Indexed: 11/10/2022]
Abstract
The title compounds, C18H15N3O4 and C17H14ClN3O3, are heterocyclic 1,3,4-oxa-diazole derivatives which differ from each other in the groups attached to the carbon atoms: a meth-oxy-phenyl ring and a benzo-nitrile group in (I) and a chloro-phenyl ring and an acetamide group in (II). Short intra-molecular C-H⋯O hydrogen bonds occur in both mol-ecules. The crystal structure of (I) features C-H⋯N hydrogen bonds, while in the crystal structure of (II), N-H⋯N, C-H⋯N and C-H⋯O hydrogen bonds are observed.
Collapse
Affiliation(s)
- K. Lakshmithendral
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India
| | - K. Archana
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India
| | - K. Saravanan
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India
| | - S. Kabilan
- Drug Discovery Lab, Department of Chemistry, Annamalai University, Annamalainagar, Chidambaram 608 002, India
| | - S. Selvanayagam
- PG & Research Department of Physics, Government Arts College, Melur 625 106, India
| |
Collapse
|
32
|
Saravanan K, Anusuya E, Kumar R, Son LH. Real-time water quality monitoring using Internet of Things in SCADA. Environ Monit Assess 2018; 190:556. [PMID: 30159608 DOI: 10.1007/s10661-018-6914-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 08/08/2018] [Indexed: 05/12/2023]
Abstract
Water pollution is the root cause for many diseases in the world. It is necessary to measure water quality using sensors for prevention of water pollution. However, the related works remain the problems of communication, mobility, scalability, and accuracy. In this paper, we propose a new Supervisory Control and Data Acquisition (SCADA) system that integrates with the Internet of Things (IoT) technology for real-time water quality monitoring. It aims to determine the contamination of water, leakage in pipeline, and also automatic measure of parameters (such as temperature sensor, flow sensor, color sensor) in real time using Arduino Atmega 368 using Global System for Mobile Communication (GSM) module. The system is applied in the Tirunelveli Corporation (Metro city of Tamilnadu state, India) for automatic capturing of sensor data (pressure, pH, level, and energy sensors). SCADA system is fine-tuned with additional sensors and reduced cost. The results show that the proposed system outperforms the existing ones and produces better results. SCADA captures the real-time accurate sensor values of flow, temperature, and color and turbidity through the GSM communication.
Collapse
Affiliation(s)
- K Saravanan
- Department of Computer Science and Engineering, Anna University Regional Campus, Tirunelveli, Tamilnadu, India
| | - E Anusuya
- Department of Computer Science and Engineering, Anna University Regional Campus, Tirunelveli, Tamilnadu, India
| | - Raghvendra Kumar
- Department of Computer Science and Engineering, LNCT College, Jabalpur, MP, India
| | - Le Hoang Son
- VNU Information Technology Institute, Vietnam National University, Hanoi, Vietnam.
| |
Collapse
|
33
|
Saravanan K, Panigrahi BK, Suresh K, Sundaravel B, Magudapathy P, Gupta M. A novel green approach for reduction of free standing graphene oxide: electrical and electronic structural investigations. Nanotechnology 2018; 29:345204. [PMID: 29856728 DOI: 10.1088/1361-6528/aac9b4] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ion beam irradiation technique has been proposed, for efficient, fast and eco-friendly reduction of graphene oxide (GO), as an alternative to the conventional methods. 5 MeV, Au+ ion beam has been used to reduce the free standing GO flake. Both electronic and nuclear energy loss mechanisms of the irradiation process play a major role in removal of oxygen moieties and recovery of graphene network. Atomic resolution scanning tunnelling microscopy analysis of the irradiated GO flake shows the characteristic honeycomb structure of graphene. X-ray absorption near edge structure analysis at C K-edge reveals that the features of the irradiated GO flake resemble the few layer graphene. Resonant Rutherford backscattering spectrometry analysis evidenced an enhanced C/O ratio of ∼23 in the irradiated GO. In situ sheet resistance measurements exhibit a sharp decrease of resistance (few 100 s of Ω) at a fluence of 6.5 × 1014 ions cm-2. Photoluminescence spectroscopic analysis of irradiated GO shows a sharp blue emission, while pristine GO exhibits a broad emission in the visible-near IR region. Region selective reduction, tunable electrical and optical properties by controlling C/O ratio makes ion irradiation as a versatile tool for the green reduction of GO for diverse applications.
Collapse
Affiliation(s)
- K Saravanan
- Materials Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam-603102, Tamilnadu, India
| | | | | | | | | | | |
Collapse
|
34
|
Ajay Kumar TV, Athavan AAS, Loganathan C, Saravanan K, Kabilan S, Parthasarathy V. Design, 3D QSAR modeling and docking of TGF-β type I inhibitors to target cancer. Comput Biol Chem 2018; 76:232-244. [PMID: 30077902 DOI: 10.1016/j.compbiolchem.2018.07.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 10/04/2017] [Revised: 05/30/2018] [Accepted: 07/08/2018] [Indexed: 01/13/2023]
Abstract
Transforming growth factor-β (TGF-β) family members plays a vital role in regulating hormonal function, bone formation, tissue remodeling, and erythropoiesis, cell growth and apoptosis. TGF-β super-family members mediate signal transduction via serine/threonine kinase receptors located on the cell membrane. Variation in expression of the TGF-β type I and II receptors in the cancer cells compromise its tumor suppressor activities which direct to oncogenic functions. The present study was aimed to screen the potent TGF-β type I inhibitors through atom based 3D-QSAR and pharmacophore modelling. For this purpose, we have chosen known TGF-β type I inhibitors from the binding database. The PHASE module of Schrodinger identified the best Pharmacophore model which includes three hydrogen bond acceptors (A), one hydrophobic region (H), and one ring (R) as the structural features. The top pharmacophore model AAAHR.27 was chosen with the R2 value of 0.94 and validated externally using molecules of the test set. Moreover the AAAHR.27 model underwent virtual screening using the molecules from the NCI, ZINC and Maybridge database. The screened molecules were further filtered using molecular docking and ADME properties prediction. Additionally, the 7 lead molecules were compared with a newly identified compound "SB431542" (well known TGF-β type I receptor inhibitor) and Galunisertib, a small molecule inhibitor of TGF-β type I, under clinical development (phase II trials) using the docking score and other binding properties. Also a top scored screened molecule from our study has been compared and confirmed using molecular dynamic simulation studies. By this way, we have obtained 7 distinct drug-like TGF-β type I inhibitors which can be beneficial in suppressing cancers reported with up-regulation of TGF-β type I. This result highlights the guidelines for designing molecules with TGF-β Type I inhibitory properties.
Collapse
Affiliation(s)
- T V Ajay Kumar
- Immunology Laboratory, Department of Pharmacy, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - Alias Anand S Athavan
- Drug Discovery laboratory, Department of Chemistry, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - C Loganathan
- Drug Discovery laboratory, Department of Chemistry, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - K Saravanan
- Drug Discovery laboratory, Department of Chemistry, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - S Kabilan
- Drug Discovery laboratory, Department of Chemistry, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India
| | - V Parthasarathy
- Immunology Laboratory, Department of Pharmacy, Annamalai University, Annamalai Nagar 608002, Tamil Nadu, India.
| |
Collapse
|
35
|
Abstract
This article describes how cloud applications are negotiated, deployed, monitored, evaluated and terminated through the service level agreements (SLA). The service definition & their objectives, performance measures, pricing, roles of the involved parties are stated as part of the SLA. Searching for SLA templates from the provider's place is considered as a cumbersome process for the consumer. Also, it is not guaranteed that retrieved SLAs always match with the consumer requirements. Hence, semantic search engine platforms for cloud SLA using a novel architecture are introduced here. SLA agreements are crawled from the web and annotation is performed in the agreement terms using SLA ontologies to fasten and improve the accuracy of the search process. In the proposed architecture, 3 ontologies are developed for SaaS, PaaS and IaaS as well as 140 SLA documents are gathered. Results revealed that the search efficacy is almost 90% in finding the desired SLA for the consumer to ease negotiation. Moreover, the performance is compared with similar search engine GoNTogle, and it was observed that proposed model produced good results.
Collapse
Affiliation(s)
- K. Saravanan
- Anna University Regional Campus, Tirunelveli, India
| | | |
Collapse
|
36
|
Jayalakshmi G, Saravanan K, Panigrahi BK, Sundaravel B, Gupta M. Tunable electronic, electrical and optical properties of graphene oxide sheets by ion irradiation. Nanotechnology 2018; 29:185701. [PMID: 29451500 DOI: 10.1088/1361-6528/aab011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The tunable electronic, electrical and optical properties of graphene oxide (GO) sheets were investigated using a controlled reduction by 500 keV Ar+-ion irradiation. The carbon to oxygen ratio of the GO sheets upon the ion beam reduction has been estimated using resonant Rutherford backscattering spectrometry analyses and its effect on the electrical and optical properties of GO sheets has been studied using sheet resistance measurements and photoluminescence (PL) measurements. The restoration of sp 2-hybridized carbon atoms within the sp 3 matrix is found to be increases with increasing the Ar+-ion fluences as evident from Fourier transform infrared, and x-ray absorption near-edge structure measurements. The decrease in the number of disorder-induced local density of states (LDOSs) within the π-π* gap upon the reduction causes the shifting of PL emission from near infra-red to blue region and decreases the sheet resistance. The improved electrical and optical properties of GO sheets were correlated to the decrease in the number of LDOSs within the π-π* gap. Our experimental investigations suggest ion beam irradiation is one of an effective approaches to reduce GO to RGO and to tailor its electronic, electrical and optical properties.
Collapse
Affiliation(s)
- G Jayalakshmi
- Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam-603 102, Tamilnadu, India
| | | | | | | | | |
Collapse
|
37
|
Prakash R, Srinivasamoorthy K, Gopinath S, Saravanan K, Vinnarasi F, Ponnumani G, Chidambaram S, Anandhan P. Radon isotope assessment of submarine groundwater discharge (SGD) in Coleroon River Estuary, Tamil Nadu, India. J Radioanal Nucl Chem 2018. [DOI: 10.1007/s10967-018-5877-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
38
|
Saravanan K, Park KS, Jeon S, Bae JW. Aqueous Phase Synthesis of 5-Hydroxymethylfurfural from Glucose over Large Pore Mesoporous Zirconium Phosphates: Effect of Calcination Temperature. ACS Omega 2018; 3:808-820. [PMID: 31457931 PMCID: PMC6641390 DOI: 10.1021/acsomega.7b01357] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 01/05/2018] [Indexed: 06/10/2023]
Abstract
For a solid acid-catalyzed dehydration of biomass-derived carbohydrates into useful furan derivatives, a suitable porous solid acid catalyst having an optimum acidic density and its strength is required to avoid cascade reactions in biomass conversion processes. A large-pore mesoporous zirconium phosphate (m-ZrP) was prepared hydrothermally using P123 as a template in water solvent, which resulted in a higher pore diameter (>9 nm) having wormhole-like pore structures with balanced Lewis (L) to Brönsted (B) acid sites. The effects of calcination temperature (500-800 °C) on the textural, acidic/basic, and structural properties of the m-ZrP with its catalytic performance for glucose dehydration to 5-hydroxymethylfurfural (HMF) were investigated in a pure water media as a green and sustainable alternative solvent. The larger number of L and B acid sites and basic sites with their appropriate strengths were clearly related with a better catalytic performance in terms of glucose conversion and HMF yield. The strong L acid and basic sites in the m-ZrP efficiently promoted the glucose isomerization to fructose, which dehydrated exclusively on the weak B acid sites resulting in a maximum conversion of glucose (83.8%) and HMF yield (46.6%). The adjusted acidic and basic sites with large mesopore sizes make the m-ZrP yield a higher reaction rate (2.78 mmol gcat -1 h-1) and turnover frequency (11.68/h) for conversion of glucose to HMF, which showed higher catalytic activity than those of a small-pore m-ZrP and other mesoporous heterogeneous and homogeneous acid catalysts.
Collapse
Affiliation(s)
| | | | | | - Jong Wook Bae
- E-mail: . Tel: +82-31-290-7347. Fax: +82-31-290-7272
| |
Collapse
|
39
|
Saravanan K, Puneeth Kumar P, Baruah A, Praveenraj J, Sathish Kumar T, Pramod Kumar S, Sivaramakrishnan T, Anuraj A, Raymond Jani Angel J, Kiruba Sankar R, Dam Roy S. IHHNV Infection from the Wild Shrimps of Andaman and Nicobar Islands, India. CURR SCI INDIA 2017. [DOI: 10.18520/cs/v113/i10/2027-2031] [Citation(s) in RCA: 2] [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: 11/15/2022]
|
40
|
Saravanan K, Kumar PP, Praveenraj J, Baruah A, Sivaramakrishnan T, Kumar TS, Kumar SP, Sankar RK, Roy SD. Investigation and confirmation of white spot syndrome virus (WSSV) infection in wild caught penaeid shrimps of Andaman and Nicobar Islands, India. Virusdisease 2017; 28:368-372. [PMID: 29291227 DOI: 10.1007/s13337-017-0406-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 10/28/2017] [Indexed: 11/30/2022] Open
Abstract
White spot syndrome virus (WSSV) is one of the most prevalent, widespread and devastating pathogen associated with shrimp population. The present study was aimed at screening the wild caught shrimps from Andaman and Nicobar Islands (ANI) for WSSV infection. Shrimp samples of different penaeid species including Penaeus monodon, Penaeus indicus, Penaeus merguiensis and Metapenaeus monoceros collected from nine different landing centers across the coast of ANI were screened for WSSV infection. Presence of white spots, a typical clinical sign of white spot disease was observed on the exoskeleton of WSSV infected shrimp samples. Out of 241 shrimp samples, 39 samples of P. monodon were found positive for WSSV by nested PCR. Histopathological examination revealed eosinophilic to basophilic intranuclear inclusion bodies in gill tissue which are typical characteristics of WSSV infection. Nucleotide sequence of WSSV isolated from ANI showed 100% identity to the sequences of WSSV reported from Thailand, Taiwan, China, Egypt, Mexico, Korea, France and 99% identity to WSSV reported from India. The detection of WSSV in wild P. monodon of ANI further confirms the virus spread and biogeography.
Collapse
Affiliation(s)
- K Saravanan
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - P Puneeth Kumar
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - J Praveenraj
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - Arunjyoti Baruah
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - T Sivaramakrishnan
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India.,ICAR-Central Institute of Brackishwater Aquaculture, 75 Santhome High Road, Raja Annamalai Puram, Chennai, 600028 Tamil Nadu India
| | - T Sathish Kumar
- ICAR-Central Institute of Brackishwater Aquaculture, 75 Santhome High Road, Raja Annamalai Puram, Chennai, 600028 Tamil Nadu India
| | - S Pramod Kumar
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - R Kiruba Sankar
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| | - S Dam Roy
- ICAR-Central Island Agricultural Research Institute, Port Blair, Andaman and Nicobar Islands 744105 India
| |
Collapse
|
41
|
Sudha SP, Gopalakrishnan MS, Saravanan K. The role of CT myelography in sparing the spinal cord during definitive radiotherapy in vertebral hemangioma. J Appl Clin Med Phys 2017; 18:174-177. [PMID: 28834112 PMCID: PMC5874956 DOI: 10.1002/acm2.12144] [Citation(s) in RCA: 6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 04/21/2017] [Accepted: 06/09/2017] [Indexed: 11/06/2022] Open
Abstract
Introduction The spinal cord is poorly visualized on CT images but is well visualized in MRI images. However, implants used for spinal stabilization can produce artifacts on the MRI images which can interfere with identification of the cord. CT myelography in conjunction with CT simulation helps to clearly delineate the cord. Materials and methods CT simulation was done in a patient with vertebral hemangioma. Pre‐ and post myelography images were obtained. Two plans were generated on pre and post myelography CT images using Eclipse™ treatment planning system (TPS) version 10.0, Varian Medical Systems, USA. The prescribed total dose to PTV was 40 Gy in 20 fractions. Results The cord was poorly visualized in the premyelogram CT images. The titanium implants used for spinal cord stabilization produced artifacts in the MRI images. Figure 1 Post myelogram, the contrast lit up the spinal cord. There was an overlap of 0.75 cc volume of the spinal cord with the PTV in the premyelogram images. This volume was reduced to 0 cc in the post myelogram images. There was an overlap of 5.4 cc volume of the PRV of spinal cord with the PTV in the premyelogram images which was reduced to 1 cc in the post myelogram images. The overlap region between the PTV and spinal cord received around 71% of the prescribed dose in premyelogram CT could be reduced to 0% in the post myelogram CT. The mean dose received by the overlap PRV spinal cord and PTV could be increased from 70% in the premyelogram to 92% in the post myelogram plans. Conclusion CT myelogram in conjunction with CT simulation is particularly useful in cases where the tumor margin is very close to the cord and spinal implants are causing distortion of magnetic resonance images.
Collapse
Affiliation(s)
- S P Sudha
- Department of Radiotherapy, Jawaharlal Institute of Post-Graduate Medical Education and Research (JIPMER), Pondicherry, India
| | - M S Gopalakrishnan
- Department of Neurosurgery, Jawaharlal Institute of Post-Graduate Medical Education and Research (JIPMER), Pondicherry, India
| | - K Saravanan
- Department of Medical Physics, Jawaharlal Institute of Post-Graduate Medical Education and Research (JIPMER), Pondicherry, India
| |
Collapse
|
42
|
Archana K, Lakshmithendral K, Saravanan K, Kabilan S, Selvanayagam S. N-[4-(4-Fluorophenyl)-1,3-thiazol-2-yl]-3-(4-methoxyphenyl)-4-methylbenzamide. IUCr Data 2017. [DOI: 10.1107/s2414314617010896] [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
In the title compound, C24H19FN2O2S, the dihedral angle between the fluorophenyl and thiazole rings is 12.8 (1)°. In the crystal, molecules are linked via strong N—H...O hydrogen bonds, forming C(11) chains propagating along [001]. In addition, C—H...O interactions are observed in this structure, forming C(10) chains propagating along [001].
Collapse
|
43
|
Divakar S, Saravanan K, Karthikeyan P, Elancheran R, Kabilan S, Balasubramanian KK, Devi R, Kotoky J, Ramanathan M. Iminoenamine based novel androgen receptor antagonist exhibited anti-prostate cancer activity in androgen independent prostate cancer cells through inhibition of AKT pathway. Chem Biol Interact 2017; 275:22-34. [PMID: 28757136 DOI: 10.1016/j.cbi.2017.07.023] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 11/03/2016] [Revised: 06/21/2017] [Accepted: 07/26/2017] [Indexed: 11/24/2022]
Abstract
Treatment by androgen receptor (AR) antagonists is one of the regimens for prostate cancer. The prolonged treatment with AR antagonist leads to the expression of point mutation in the ligand binding domain of the AR. This point mutation causes resistance to AR antagonist by converting them into an agonist. The T887A mutated AR was frequently expressed in androgen independent prostate cancer (AIPC) patients. Through literature survey and molecular modelling, we have identified a novel AR antagonist having a bulky β-iminoenamine BF2 complex scaffold. The tested and standard ligands were screened in AR positive (LNCaP, MCF-7 and MDA-MB-453), AR negative (PC3), and non-cancerous (3T3) cell lines through anti-proliferation assay. The ligand, ARA3 was the most potent molecule among all the tested ligands and was 7.6 folds selective for AR positive cell lines. The mechanism of anti-prostate cancer activity of ARA3 was confirmed by western blot, qPCR, and apoptotic assays in LNCaP (T887A positive AR) cells. Structural activity relationship was derived by correlating the in-vitro and in-silico data. Consequently, we have identified the essential functional groups that could prevent the resistance concerning mutant AR. The ARA3 induces the apoptosis in AIPC cells by preventing the AR mediated activation of AKT pathway. The bicalutamide did not induce the apoptosis because it failed to prevent the AR mediated activation of AKT.
Collapse
Affiliation(s)
- S Divakar
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India
| | - K Saravanan
- Department of Chemistry, Annamalai University, Chidambaram, Tamil Nadu, India
| | - P Karthikeyan
- Shasun Research Centre, Kellakottaiyur, Chennai, Tamil Nadu, India
| | - R Elancheran
- Department of Chemistry, IASST, Guwahati, Assam, India
| | - S Kabilan
- Department of Chemistry, Annamalai University, Chidambaram, Tamil Nadu, India
| | | | | | - J Kotoky
- Department of Chemistry, IASST, Guwahati, Assam, India
| | - M Ramanathan
- Department of Pharmacology, PSG College of Pharmacy, Coimbatore, Tamil Nadu, India.
| |
Collapse
|
44
|
Lee ASY, Liang S, Saravanan K, Chong D, Tan BY, Ho KL, Teo WS, Ching CK, Tan VH, Wong K. P380The Zerox pilot study: use of zero fluoroscopy for electrophysiological intervention. Europace 2017. [DOI: 10.1093/ehjci/eux141.105] [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: 11/12/2022] Open
|
45
|
Archana K, Saravanan K, Lakshmithendral K, Kabilan S, Selvanayagam S. 3-(4-Methoxyphenyl)-4-methyl- N-[4-(4-methylphenyl)-1,3-thiazol-2-yl]benzamide. IUCr Data 2017. [DOI: 10.1107/s2414314617007210] [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
In the title compound, C25H22N2O2S, the methylphenyl rings are oriented with a dihedral angle of 19.4 (1)° with respect to each other. In the crystal, molecules are linkedviastrong N—H...O hydrogen bonds, which formC(11) chains propagating along [001]. In addition, weak C—H...O and C—H...π interactions are observed in the structure.
Collapse
|
46
|
Saravanan K, Jayalakshmi G, Chandra S, Panigrahi BK, Krishnan R, Sundaravel B, Annapoorani S, Shukla DK, Rajput P, Kanjilal D. The influence of carbon concentration on the electronic structure and magnetic properties of carbon implanted ZnO thin films. Phys Chem Chem Phys 2017; 19:13316-13323. [PMID: 28492651 DOI: 10.1039/c7cp01939d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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
The influence of carbon concentration on the electronic and magnetic properties of C-implanted ZnO thin films has been studied using synchrotron radiation based X-ray absorption spectroscopic techniques and vibrating sample magnetometer measurements. 20 keV carbon ions were implanted in ZnO films with different fluences (2 × 1016, 4 × 1016 and 6 × 1016 ions per cm2). The pristine ZnO film shows diamagnetic behaviour while the C-implanted films exhibit room temperature ferromagnetism. Our first-principles calculations based on density functional theory show an appreciable magnetic moment only when the implanted C atom sits either in the O-site (2 μB) or in the interstitial position (1.88 μB), whereas the C atom in the Zn substitutional position does not possess any magnetic moment. X-ray absorption near edge structure analysis at the O K-edge reveals that the charge transfer from O-2p to the C-defect site causes the ferromagnetism in the C-implanted ZnO film at low fluence. However at high fluence, the implanted C replaces the lattice and produces more Zn vacancies, as evidenced by extended X-ray absorption fine structure studies at the Zn K-edge, which favors the ferromagnetism. The persistence of the implanted carbon and ferromagnetism of the C-implanted ZnO film has also been studied by isothermal annealing at 500 °C and discussed in detail.
Collapse
Affiliation(s)
- K Saravanan
- Material Science Group, Indira Gandhi Centre for Atomic Research, HBNI, Kalpakkam - 603102, India.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Saravanan K, Jayalakshmi G, Panigrahi BK, Hübner R. Strain and particle size analysis in ion beam synthesized SiC nanoparticles using Raman scattering studies. Crystal Research and Technology 2017. [DOI: 10.1002/crat.201600391] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- K. Saravanan
- Materials Science Group; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
| | - G. Jayalakshmi
- Materials Science Group; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
| | - B. K. Panigrahi
- Materials Science Group; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
- Homi Bhabha National Institute; Indira Gandhi Centre for Atomic Research; Kalpakkam 603102 India
| | - René Hübner
- Institute of Ion Beam Physics and Materials Research; Helmholtz-Zentrum Dresden-Rossendorf; 01328 Dresden Germany
| |
Collapse
|
48
|
Saravanan K, Elancheran R, Divakar S, Anand SAA, Ramanathan M, Kotoky J, Lokanath N, Kabilan S. Design, synthesis and biological evaluation of 2-(4-phenylthiazol-2-yl) isoindoline-1,3-dione derivatives as anti-prostate cancer agents. Bioorg Med Chem Lett 2017; 27:1199-1204. [DOI: 10.1016/j.bmcl.2017.01.065] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 01/08/2017] [Accepted: 01/23/2017] [Indexed: 11/28/2022]
|
49
|
Magudapathy P, Srivastava S, Gangopadhyay P, Amirthapandian S, Saravanan K, Das A, Panigrahi B. Alloying of metal nanoparticles by ion-beam induced sputtering. Chem Phys Lett 2017. [DOI: 10.1016/j.cplett.2016.11.041] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
50
|
Park KS, Saravanan K, Park SJ, Lee YJ, Jeon KW, Bae JW. Effects of CO2 on the deactivation behaviors of Co/Al2O3 and Co/SiO2 in CO hydrogenation to hydrocarbons. Catal Sci Technol 2017. [DOI: 10.1039/c7cy01065f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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
Different deactivation behaviors of the prototype Co/γ-Al2O3 (CoAl) and Co/SiO2 (CoSi) catalysts under an excess CO2 environment were investigated in terms of the surface oxidation and aggregation of cobalt crystallites for the Fischer–Tropsch Synthesis (FTS) reaction.
Collapse
Affiliation(s)
- Kyung Soo Park
- School of Chemical Engineering, Sungkyunkwan University (SKKU)
- Suwon
- Republic of Korea
| | - K. Saravanan
- School of Chemical Engineering, Sungkyunkwan University (SKKU)
- Suwon
- Republic of Korea
| | - Seon-Ju Park
- Korea Research Institute of Chemical Technology (KRICT)
- Daejeon 305-600
- Republic of Korea
| | - Yun-Jo Lee
- Korea Research Institute of Chemical Technology (KRICT)
- Daejeon 305-600
- Republic of Korea
| | - Ki-Won Jeon
- Korea Research Institute of Chemical Technology (KRICT)
- Daejeon 305-600
- Republic of Korea
| | - Jong Wook Bae
- School of Chemical Engineering, Sungkyunkwan University (SKKU)
- Suwon
- Republic of Korea
| |
Collapse
|