Profile
Name Dr. M. Thirumalaikumar
Designation Assistant Professor
Areas of Interest Organic Chemistry
Room No. 13-101
Intercom No. 169 and 851
Mobile 9710265497
Email Id (Official) mtkumar@svce.ac.in
Email Id (Personal) mtkumarsiva@rediffmail.com
Qualification
  • Ph.D. (Organic Chemistry) – Madurai Kamaraj University, Madurai – 1998
  • M.Sc. (Chemistry) – Madurai Kamaraj University, Madurai – 1991
  • B.Sc. (Chemistry) – Madurai Kamaraj University, Madurai – 1989

    • MEMBERSHIP

  • Life Member – ISTE
Academic Experience
  • Academic Experience, Assistant Professor (01.10.2010 – Till date), Department of Applied Chemistry, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudhur – 602117.
  • Lecturer (01.08.2006 – 30.09.2010), Department of Applied Chemistry, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudhur – 602117.
  • Deputy Manager (01-12-2004 – 31-05-2005), Amrutanjan Limited, Egattur, Padur P.O., Chennai – 603 103, TN, INDIA
  • Post Doctoral Fellow (01-01-2003 – 31-12-2003), Prof. Pedro Merino, Laboratory of Asymmetric Synthesis, Department of Organic Chemistry, University of Zaragoza, E-50009 Zaragoza, SPAIN.
  • Research Associate (12-04-2002 – 30-09-2002), Prof. G. Sundararajan, Department of Chemistry, Indian Institute of Technology Madras, Chennai – 600 036, TN, INDIA.
  • Post Doctoral Fellow (14-12-2000 – 13-12-2001), Prof. Israel Agranat, Department of Organic Chemistry, The Hebrew University of Jerusalem, 91904 – Jerusalem, ISRAEL.
  • Research Associate (01-09-1998 – 31-10-2000), Prof. M. Periasamy, School of Chemistry, University of Hyderabad, Hyderabad – 500 046, AP, INDIA.
Courses Handled
  • Engineering Chemistry I (CY16151)
  • Engineering Chemistry II (CY16251)
  • Engineering Chemistry (CY18151)
  • Chemistry Laboratory (PC18161)
  • Organic Chemistry (CH16301 & CY18251)
  • Organic Chemistry Laboratory (CH16311)
  • Physical Chemistry (CH16303)
  • Instrumental Methods of Analysis (CH16405 & CH18405)
  • Environmental Science and Engineering (GE16451 & GE18251)
  • Applied Chemistry (CH18305)
  • Applied Chemistry Laboratory (CH18311)
  • Technical Analysis Laboratory (CH18412)
Research & Consultancy
    Part-time Ph.D. candidate registered

  • Ms. Revathi, DMI College of Engineering

    • Papers Published

  • Green corrosion inhibitors in various corroding media, M.Thirumalaikumar, Bulgarian Chemical Communications, 53(2), 142-157 (2021).
  • Ring Opening Reactions of Epoxides – A Review, M.Thirumalaikumar, Org. Prep. Proceed. Int.,1-38 (2021).
  • Structural, spectral elucidation, wave functional properties, natural bond orbitals and molecular docking analysis of synthesized 1-phenyl-3-(4-methoxyphenyl)-2-propenone: protease kinase inhibitor, H.Revathi, M.Thirumalaikumar, S.Muthu, Spectroscopy Letters, 1-18 (2021).
  • Quantum Chemical Vibrational Study, FTIR and FT-Raman Spectra of 1,3-Diphenyl Propenone, H.Revathi, M.Thirumalaikumar, S.Sampathkrishnan, C.Charanya and N.Balamurugan, Spectrsocopy and Spectral Analysis, 39(12), 3932 – 3929 (2019).
  • Quantum Chemical and Corrosion Inhibition studies of (4-Chlorophenyl)-N-(4-Methylphenyl) nitrone, P.G.Rubarani, S.Sampathkrishnan and M.Thirumalaikumar, Spectrsocopy and Spectral Analysis, 39(12), 3940 – 3945 (2019).
  • Structural and spectral studies on Benzoyl thiourea based on DFT calculations R.Kumutha, S.Sampath Krishnan, P.G.Rubarani and M.Thirumalaikumar Journal of Advances in Chemistry, 12(15), 4826 – 4844 (2016)
  • Molecular structure, non linear optical, second order perturbation studies and thermodynamic properties of 2-(1-phenylethylidene)hydrazine carbaxamide by density functional theory P.G.Rubarani, S.Sampath Krishnan and M.Thirumalaikumar Journal of Chemical and Pharmaceutical Research, 7(7), 875 – 893 (2015)
  • Computational studies on 2-(2-hydroxyphenyl)-N-phenyl nitrone, spectroscopic investigation R.Kumutha, S.Sampath Krishnan and M.Thirumalaikumar Oriental Journal of Chemistry, 30(4), 1905 – 1912 (2014)
  • Experimental and theoretical investigations of spectroscopic properties of N-acetyl thiourea R.Kumutha, M.Thirumalaikumar, S.Sampath Krishnan Elixir Comp. Chem., 63, 18536 – 18554 (2013)
  • Reductive amination of aldehydes with sodium borohydride-silica gel system H.Revathi and M.Thirumalaikumar Chemical Science Transactions, 2(S1), S43 – S46 (2013)
  • Quantum mechanical study of the structure and spectroscopic, first order hyperpolarizability, Fukui function, NBO, normal coordinate analysis of phenyl-N-(4-methylphenyl) nitrone N.R.Sheela, S.Sampathkrishnan, M.Thirumalaikumar and S.Muthu Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 112, 62-77 (2013).
  • Synthesis, spectroscopic (FT-IR, FT-Raman, 13C, 1H, UV) study, first order hyperpolarizability, NBO analysis, HOMO and LUMO analysis of 2(2-hydroxyphenyl(-N-(4-methylphenyl) nitrone N.R.Sheela, S.Sampathkrishnan, M.Thirumalaikumar and S.Muthu Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 109, 272-281 (2013).
  • Deoxygenation of nitrones using NaBH4-silica gel system M.Thirumalaikumar , S.Jegannathan and S.Dharaniya Int. J. Chem. Sci., 10, 2027-2032 (2012).
  • Zinc Phosphating of Aluminium by Electrochemical Method S.Jegannathan and M.Thirumalaikumar International Journal of Contemporary Science, Engineering and Technology, 2, 19-26 (2011).
  • Enantioselective Michael Addition Reactions M.Thirumalaikumar Organic Preparations and Procedures International, 43,(1),67-129(2011).
  • Inhibition effects of nitrones on the corrosion of mild steel in organic acid media M.Thirumalaikumar and S.Jegannathan Portugaliae Electrochimica Acta, 29(1), 1-8 (2011).
  • Stereoselective synthesis of pyrrolidinyl glycines from nitrones: complementarity of nucleophilic addition and 1,3-dipolar cycloaddition P.Merino, P.Padar, I.Delso, M.Thirumalaikumar , T.Tejero and L.Kovacs Tetrahedron Letters, 47, 5013 – 5016 (2006).
  • Unusual dimerization of 3-methylphenalen-1-one, leading to a chiral heptacyclic oxocin S. Pogodin, M. Thirumalaikumar , S. Cohen and I. Agranat Letters in Organic Chemistry, 2, 398 – 403 (2005).
  • Peri interactions in naphthalene diketones : A preference for (Z,Z) conformations Shmuel Cohen, Muniappan Thirumalaikumar , Sergey Pogodin and Israel Agranat Structural Chemistry, 15, 339 (2004).
  • Asymmetric dihydroxylation of trans-stilbene with a new chiral ligand prepared using dihydrocinchonine and C2 symmetric chiral trans-9,10-dihydroethanoanthracene-11,12- dicarboxylic acid M.Periasamy, C.R.Ramanathan, N.Sampath Kumar and M.Thirumalaikumar Journal of Chemical Research (S), 512 – 513 (2001).
  • Methods of enhancement of reactivity and selectivity of sodium borohydride for applications in organic synthesis M.Periasamy and M.Thirumalaikumar Journal of Organometallic Chemistry, 609, 137 – 151 (2000).
  • Synthesis, characterisation and antimicrobial studies of metal(II) bis- chelates and mixed-ligand complexes of -(2-hydroxyphenyl)-N-(1- phenyl-2-nitroethyl)nitrone M.Thirumalaikumar , S.Sivakolunthu, S.Muthusubramanian, P.Mohan and S.Sivasubramanian Bolletino Chimico Farmaceutico, 138(5), 207- 210 (1999).
  • Unexpected reaction of -aryl-N-( -phenylethyl)nitrones with chlorinating agents P.Mohan, A.Vanangamudi, M.Thirumalaikumar , S.Muthusubramanian and S.Sivasubramanian Synthetic Communications, 29(11), 2013 (1999).
  • Synthesis and characterisation of cobalt(II), nickel(II) and copper(II) bis-chelates and mixed-ligand complexes of -(2-hydroxyphenyl)-N-(2- nitrocyclohexyl)nitrone M.Thirumalaikumar , S.Sivakolunthu, A.Ponnuswamy and S.Sivasubramanian Indian Journal of Chemistry(Sec.A), 38A, 720 – 722 (1999).
  • Synthesis and antibacterial study of nitrones with sulfur heterocycles G.Valli, M.Thirumalaikumar , S.Muthusubramanian and S.Sivasubramanian Indian Journal of Heterocyclclic Chemistry, 8, 153 – 154 (1998).
  • A clean clay catalyzed synthesis of ,N-diarylnitrones C.Venkatachalapathy, M.Thirumalaikumar , S.Muthusubramanian, K.Pitchumani and S.Sivasubramanian Synthetic Communications, 27(23), 4041 -4047 (1997).
  • Synthesis, reactions and antimicrobial studies of -aryl-N-(2- nitrocyclohexyl)nitrones M.Thirumalaikumar , S.Sivasubramanian, A.Ponnuswamy and P.Mohan European Journal of Medicinal Chemistry, 31, 905 – 908 (1996).
  • Rearrangement of nitrones with acetic anhydride S.Sivasubramanian, M.Thirumalaikumar , K.Ravichandran and S.Muthusubramanian Indian Journal of Chemistry(Sec.B), 35B, 1345 – 1346 (1996).
  • Synthesis, reactions and antibacterial activity of N-(arylmethylene)- – phenyl- – nitroethylamine-N-oxides S.Sivasubramanian, C.Amutha, M.Thirumalaikumar and S.Muthusubramanian Indian Journal of Chemistry(Sec.B), 35B, 503 – 504(1996).
  • Chemoselective elimination of iodine azide – Directivity effect of the t- butyl group S.Sivasubramanian, A.Ponnuswamy, S.Muthusubramanian and M.Thirumalaikumar Indian Journal of Chemistry(Sec.B), 35B, 77 – 78 (1996).
  • Synthesis and separation of the E and Z isomers of simple aldonitrones S.Sivasubramanian, P.Mohan, M.Thirumalaikumar and S.Muthusubramanian Journal of Chemical Society – Perkin Transactions 1, 3353 – 3354 (1994).
Conference / Workshop / FDP
  • Undergone Innovation Ambassador Training (Foundation Level) conducted by MoE’s Innovation Cell & AICTE during 30.06.2021 – 30.07.2021.
  • Participated in the International Conference on “Smart Materials and Emerging Technologies for Industry 4.0” organized by the Department of Mechanical Engineering, Sri Venkateswara College of Engineering on 16 & 17 October 2020.
  • Participated in International webinar on “Laser activated drugs for cancer treatment – a potential alternative to conventional chemotherapy” organized by the Department of Applied Physics, SVCE on 3rd August 2020.
  • Participated in a three days workshop on “Aspects of Outcome Based Education and Use of Software” organized by the Department of Biotechnology, SVCE during 6 – 8 August 2020.
  • Participated in National webinar on “Chemistry, the cradle of nanochemistry” organized by the Department of Chemistry, BMS College for Women on 7th August 2020.
  • Participated in the webinar on “Nanotechnology and Climate Change” organized by the Department of Biotechnology and Biochemical Engineering, Sree Chitra Thirunal College of Engineering on 28th August 2020.
  • Participated in the International Level Webinar on “Corrosion Performances of Light Metals” organized by the Department of Chemistry, Hindusthan Institute of Technology, on 2nd July 2020.
  • Participated in the International Level Webinar on “Interactions of water/ionic liquid solutions & Biomolecules” organized by the Department of Applied Physics, Sri Venkateswara College of Engineering, on 3rd July 2020.
  • Participated in the webinar on “Pharmaceutical Chemistry – Advancements in Drug Manufacturing” organized by the Department of Applied Chemistry on 10th July 2020.
  • Participated in the webinar on “Insightful Introduction to MATLAB” organized by the Department of Mechanical Engineering & IQAC, Sri Venkateswara College of Engineering on 11th July 2020.
  • Participated in online FDP on “Recent Advanced Research in Chemistry” organized by the Department of Chemistry, C B H College of Engineering and Technology during 15 – 19 July 2020.
  • Participated in online FDP on “Emerging Trends in Energy, Environment and Nanomaterials (EEN 2020)” organized by the Department of Applied Chemistry during 24 – 30 July 2020.
  • Participated in the webinar on “Nanotechnology Approaches for COVID-19 Challenges” organized by the Department of Chemistry, SNS College of Technology on 31st July 2020.
  • Participated in the National Level Webinar on “Solid Waste Management” organized by Department of Chemistry, School of Arts and Science, AV Campus, VMRF, Paiyanoor, Chennai, on 5th June 2020.
  • Participated in the Webinar on “How to get the fastest promotion highest increment” organized by J.Z.Shah Arts & H.P.Desai Commerce College, Amroli, on 7th June 2020.
  • Participated in the Webinar on “Youth and Nation” organized by J.Z.Shah Arts & H.P.Desai Commerce College, Amroli, on 9th June 2020.
  • Participated in the Webinar series on “Chemistry” organized by Department of Chemistry, Queen Mary’s College, Chennai, during 10th – 13th June 2020.
  • Participated in the Webinar on “Metal Complexes as Anticancer Agents” organized by Department of Applied Chemistry, Sri Venkateswara College of Engineering, Chennai, on 11th June 2020.
  • Attended “Leadership Talk with Shri. R. Subrahmanyam” organized by MHRD’s Innovation Cell, on 13th June 2020.
  • Participated in the Webinar on “Corrosion and its control initiation in Environments” organized by Department of Chemistry, Kings Engineering College, Chennai, on 13th June 2020.
  • Participated in the National level E-Quiz on “Green Chemistry” conducted by Department of Chemistry, Periyar EVR College, Trichy, on 18th June 2020.
  • Participated in the online Super Session “Future of Education” conducted by ICT Academy, on 18th June 2020.
  • Participated in the National level webinar on “Cyber Crime & Law” conducted by IETE, Chennai, on 20th June 2020.
  • Participated in the International Webinar on “Advanced Materials for Biomedical Devices: Challenges and Progress” organized by Department of Applied Physics, SVCE, on 24th June 2020.
  • Participated in the Webinar on “Optimum Cyber Security functions required for an Organization” organized by Department of Information Technology, SVCE, on 26th June 2020.
  • Participated in the International Webinar on “Foods: Fabulous Medicines” organized by the Department of Chemistry, Government Arts College for Women, Salem, on 26th June 2020.
  • Participated in the Webinar on “Fundamentals of Mass Spectrometry” organized by Department of Applied Chemistry, SVCE, on 29th June 2020.
  • Participated in the Webinar on “Preparation and Characterization of Antibacterial, Nano composite films & fabrics by in-situ Bioreduction” organized by Department of Applied Physics, SVCE, on 30th June 2020.
  • Completed online course on “Introduction to Molecular Spectroscopy” Coursera, on 3rd June 2020.
  • Completed online course on “Nanotechnology: A Maker’s Course”, Coursera, on 14th June 2020.
  • Completed online course on “Air Pollution – a Global Threat to our Health, Coursera, on 15th June 2020.
  • Participated in the International Webinar on “Cloud Computing for Everyone”, organized by IQAC, SVCE, on 19th July 2020.
  • Attended CO-PO Attainment Computation and Outcomes Analysis webinar conducted by InPods on 30th May 2020.
  • Participated in the National Level Webinar on “Watershed Prioritization” organized by Department of Chemistry, School of Arts and Science, AV Campus, VMRF, Paiyanoor, Chennai on 30th May 2020.
  • Participated in a Webinar on “Insights to INDUSTRY 4.0” organized by Department of Mechanical Engineering, S.A.Engineering College, Chennai on 29th May 2020.
  • Attended NAAC Accreditation Management System demo webinar conducted by InPods on 27th May 2020.
  • Participated in the two day online workshop on “Matlab Applications in Process Simulation and Control”, organized by Department of Chemical Engineering, Sri Venkateswara College of Engineering, Sriperumbudur on 23rd and 24th May 2020.
  • Attended the Webinar on “Chemistry through IT – a Lighthouse to Chemist” conducted by the Department of Chemistry, Bhaktavatsalam Memorial College for Women, Chennai on 20th May 2020.
  • Completed e-learning program on “Fuel and Combustion” on 18th May 2020.
  • Attended Leadership Talk with Dr.Pramod Chaudhari, Chairman, Praj Industries Limited on 16th May 2020.
  • Participated in online FDP on “The Impact of Covid-19 in Manufacturing Sector in India” conducted by Shree Chandraprabhu Jain College, Minjur on 16th May 2020.
  • Attended the India First Leadership Talk webinar with Prof.D.P.Singh, Chairman UGC on 9th May 2020 by MHRD’s Innovation Cell.
  • Completed online course “Organic Chemistry: Spectroscopy Master Class” on 9th May 2020.
  • Quantum chemical vibrational study, FT-IR and FT-Raman spectra of 1,3-diphenyl propenone H.Revathi, M.Thirumalaikumar, S.Sampathkrishnan, C.Charanya and N.Balamurugan Spectroscopy and Spectral Analysis, 39(12), 3932 (2019).
  • Quantumemical and corrosion inhibition studies of (4-chlorophenyl)-N-(4-methylphenyl) nitrone P.G.Ruparani, S.Sampathkrishnan and M.Thirumalaikumar Spectroscopy and Spectral Analysis, 39(12), 3940 (2019).
  • Participated in the IQAC enabled National Conference on Food Processing and Preservation : Biochemical Principles, Quality & Safety (FPP 2019) during 22-03-2019 and 23-03-2019 at Annamalai University, Chidambaram.
  • Participated in the AICTE sponsored one week QIP Short Term Course on NMR Spectroscopy for Pharma and Biotech Research during 20 24 May 2019 at IIT Bombay, Mumbai.
  • Participated in QIP Short Term Course on Fundamental and Practical Aspects of Corrosion during 22 26 June 2019 at IIT Kanpur, Kanpur.
  • Participated in a course on “Electrochemistry Basics, Analysis and Applications” during 11 – 15 June 2018 under the Quality Improvement Programme of AICTE, New Delhi conducted by Centre for Continuing Education, Indian Institute of Science, Bangaluru.
  • Attended Short Term Course on “Nanomaterials: Characterization & Applications” conducted by Department of Applied Sciences, NITTTR – Chandigarh during 21.11.2016 – 25.11.2016.
  • Contemporary Research and Practices in Pollutant Elimination Systems Towards Cleaner Environment conducted by Department of Chemical Engineering, Sri Venkateswara College of Engineering, Srieprumbudur from 20th to 26th May 2013.
  • Attended Faculty Development Programme on “Catalysis – From Concepts to Applications” at NIT Calicut, Kerala during 04-06-2012 – 08-06-2012.
  • Presented a paper entitled “Utility of Non-biodegradable Wastes” (S. Jegannathan and M. Thirumalaikumar) at National Level Conference on “Recent Trends in Solid Waste Management – NCRTSWM 2012 organized by Department of Chemistry, Chennai Institute of Technology, Kundrathur, Chennai – 600069 on 17th March 2012.
  • Presented a paper entitled “Reductive amination of carbonyl compounds by using sodium borohydride-silica gel system” (K. Jayashree, G. Archana and M. Thirumalaikumar) at National Level Technical Symposium “CHEMFLUENCE’12” organized by Department of Chemical Engineering, Anna University, Chennai – 600025 during 29-02-2012 – 02-03-2012 (Received second prize for this presentation).
  • Synthesis, AB initio and Density Functional Theory studies of vibrational spectra of (2-Hydroxyphenyl)-N-(4-methylphenyl)nitrone N.R.Sheela, M.Thirumalaikumar, R.P.Gangadharan, S.Muthu and S.Sampath Krishnan Proceedings of the National Seminor on “Current Trends in Chemistry”, CTriC 2011, Cochin University of Science and Technology, Kochi, Kerala, PP-6, 26, March 4-5, 2011.
  • QIP on Instructional Design and Delivery conducted by NITTTR, Sri Venkateswara College of Engineering, Pennalur, May 2009.
  • QIP on Instructional Design and Delivery conducted by NITTTR, Sri Venkateswara College of Engineering, Pennalur, January 2007.
  • Nitrones from vanillin and its tosylates – M.Thirumalaikumar, G.Valli, S.Muthusubramanian and S.Sivasubramanian- National Symposium, Madurai Kamaraj University, Madurai, OP-1, 22-24 April 1998.
  • Sodium borohydride reduction of -aryl-N-(2-nitrocyclohexyl)nitrones – M.Thirumalaikumar, S.Muthusubramanian, P.Mohan and S.Sivasubramanian – National Symposium, Madurai Kamaraj University, Madurai, OP-2,22-24 April 1998.
  • Sulphuryl chloride initiated rearrangement of -aryl-N-( -phenylethyl) nitrones – P.Mohan, M.Thirumalaikumar, S.Muthusubramanian and S.Sivasubramanian National Symposium, Madurai Kamaraj University, Madurai, OO-13,22-24 April 1998.
  • Synthesis and biological studies of -(2-p-toluenesulphonato)phenyl-N- arylnitrones – G.Valli, M.Thirumalaikumar, S.Muthusubramanian and S.Sivasubramanian – National Symposium, Madurai Kamaraj University, Madurai, OP-66,22-24 April 1998.
  • Synthesis of -aryl-N-(1-phenyl-2-nitroethenyl)nitrones via the tandem synthesis of 2-nitro-1-phenyl-1-hydroxylaminoethylene – M.Thirumalaikumar, P.Mohan, S.Muthusubramanian and S.Sivasubramanian Indian Council of Chemists, 15th Conference, Dr.Baba Saheb Ambedkar Marathwada University, Aurangabad, OP-42, 24-25 October 1996.
  • Synthesis and characterisation of Cu(II), Co(II) and Ni(II) bis-chelates of -(2-hydroxyphenyl)-N-( -phenylethyl)nitrone – P.Mohan, M.Thirumalaikumar, S.Sivakolunthu and S.Sivasubramanian Indian Council of Chemists, 15th Conference, Dr.Baba Saheb Ambedkar Marathwada University, Aurangabad, IO-14, 24-25 October 1996.
  • Synthesis and characterisation of Cu(II), Co(II) and Ni(II) bis-chelates of -(2- hydroxyphenyl)-N-(2-nitrocyclohexyl)nitrone – M.Thirumalaikumar, S.Sivakolunthu and S.Sivasubramanian Indian Council of Chemists, 14th Conference, The Institute of Science, Bombay, IO-26, 28-30 December 1995.
  • Stereochemistry of the addition of nitroalkanes to 2-aryl-2-cyclohexen-1- ones – S.Muthusubramanian, A.Ponnuswamy, M.Thirumalaikumar and S.Sivasubramanian – Indian Council of Chemists, 14th Conference, The Institute of Science, Bombay, OO-45, 28-30 December 1995.
  • Synthesis and reactions of -aryl-N-(2-nitrocyclohexyl)nitrones – S.Sivasubramanian, M.Thirumalaikumar and A.Ponnuswamy – Indian Council of Chemists, 13th Conference, University of Jammu, Jammu, OO-48, 24-26 October 1994.
Laboratory Handled
Training Attended
Additional Responsibilities
  • College Time Table Coordinator
  • ISO Auditor
  • NBA, NAAC, IQAC Coordinator
  • Physical Chemistry Laboratory Incharge
  • Research Coordinator
Achievements
expand_less
motorchip aiflasksideasketch website toygearbiotechnologydata-complexitypromotioncomputersoftwareweb-design idea-1 creativitymicroscopechemistrymodelassemblyplay-outlined-circular-buttonpausecreative open-bookteamwork-team gaugegoallaboratory mathematicsatommechanicmicroscope-1 factory sketch-1 charitysystempistonscruise envelopefacebook-placeholder-for-locate-places-on-mapssmartphone-callold-typical-phoneuserantennacoding computers-network-interface-symbolsearchgoodwillplay-buttonpause-1 tickleft-arrow