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Dr.(Ms.) Jyotirekha G. Handique

Professor, Department of Chemistry
  • Email - jghandique@dibru.ac.in
  • Department of Chemistry
  • Designation - Professor

Profile

Educational Qualifications

  • M.Sc. (Gauhati University)
  • Ph.D. (Indian Institute of Technology-Guwahati)

Specialization: Organic Chemistry

Contact: jghandique@rediffmail.com

Professional Experience

12.05.2013 - till date 

Professor, Dept. of Chemistry, DU

01.01.2018 - 30.06.2019

Director (Honorary)
Educational Multimedia Research Centre (EMRC), DU

02.07.2012 - 01.07.2015

Head, Department of Chemistry, DU

12.05.2010 - 11.05.2013

Associate Professor, Dept. of Chemistry, DU

12.05.2007 - 11.05.2010

Reader, Dept. of Chemistry, DU

09.01.2001 – 11.05.2007

Senior Lecturer, Dept. of Chemistry, DU

29.03.1994 - 08.01.2001

Lecturer, Dept. of Chemistry, DU

Worked as Part time faculty

  1. Centre for Women Studies, DU to teach Science, Technology and Women, Upgradation of Technology Skills and Rural Technology in PGCC in Women’s Studies in 2006
  2. Centre for Bioinformatics Studies, DU, to teach Biochemistry in M.Sc. in Bioinformatics in 2010-11.

Area of interest

  • Synthetic Organic Chemistry and Natural Products Chemistry

Area of research       

  • Synthesis of dendritic polyphenols and studies of their antioxidant properties
  • Antioxidant properties of herbal food and beverages of North East India
  • Chemical investigation of medicinal plants of North East India

Research guidance

M. Phil.: 6 (Degree awarded)

1. Prakash Upadhyay

Chemical Investigation of Stephania hernandifolia, A less known medicinal plant species of Assam, used for antifertility

2. Manas Pratim Boruah

Evaluation of Antioxidant Properties of Some Herbal Food Additives and Beverages of North East India

3. Moushumi Hazarika

Studies on Antioxidant and Antibacterial Properties of Some Medicinal Plants of North East India

4. Nishi Gandha Gogoi

Studies on Curcumin Derived Imines as Antioxidant and Stabilizer for Nanosilver Catalyst

5. Jhorna Borah

Synthesis of Some Phenolic Schiff Bases and Evaluation of their Antioxidant, Antibacterial and Ion Sensing Properties

6. Madhusmita Baruah

Hydrogel Composite Fertilizer for Slow Phosphorous Delivery for Agricultural Application

 

Ph.D.: Degree awarded: (8)            

Names of the scholars

Title of Thesis

1. Dr. Manas Pratim Boruah

Studies on antioxidant and antimicrobial activities of some traditional medicinal plants and preserved food additives of North East India

2. Dr.(Ms.) Dipika Kalita

Studies on phenolic antioxidants of some medicinal plants of Assam

3. Dr. Dhrubajyoti Mahanta

Design, synthesis and studies of some important properties of dendritic polyphenols

4. Dr. Dipankoj Gogoi

Studies on antioxidant activities of some traditional alcoholic beverages of Assam and the plants used in their fermentation cakes

5. Dr. Romesh Borgohain

Development of Synthetic Protocols and Physicochemical Studies of Derivatives of Phenolic Acids and Aldehydes

6. Dr. Gyanashree Bora

Synthesis of Some Phenolic Schiff Bases and Study of Their Applications

7. Dr. Mridusmita Sarmah

Biochar from Tea Waste and its Application for Sustainable Tea Cultivation: Utilizing the Unutilized

8. Dr. Nishi Gandha Gogoi

Synthesis and Studies of Biological Activities of some Curcumin Conjugates and Their Role in Nanoformulations

Ph.D.: Present Group: (5)

Bidyot Bikash Gogoi (Thesis submitted), Pradip Kumar Goswami, Jitupon Gogoi, Upasana Bhuyan, Kaberijyoti Konwar

Research projects

1) Synthesis, characterization and physicochemical properties of some polyphenols with simple dendritic architecture: Funded by DST, Govt. of India (2008-2012) (Principal Investigator)

Amount: Rs. 31 lakh

2) Chemical prospecting of certain less known medicinal plant species of Assam used for antifertility: Funded by G B Pant Institute of Himalayan Environment and Development (GBPIHED), Govt. of India, (2004-2008) (Principal Investigator)

Amount: Rs. 8.5 lakh

3) A scientific study of medicinal properties of some unexplored ethno-medicinal plants of North-East India: (SAP-DRS-I): Funded by UGC, Govt. of India (2008-2013) (Deputy Co-ordinator)

Amount: Rs. 39 lakh

Reviewer of various Journals, viz., RSC Advances, European Journal of Medicinal Chemistry, National Academy Science Letters, Natural Product Research, Journal of Food and Nutritional Disorders, Advances in Pharmacological Sciences

Seminar organised

Organising Secretary, National Seminar on Recent Advances in Chemical Sciences, held in Department of Chemistry, DU on 26-27 March, 2009

Chairperson, Organising Committee, National Seminar on Recent Trends in Fundamental and Applied Chemical Sciences, held in Department of Chemistry, DU, on 19-21 November, 2014

Other Academic and Administrative Assignments

  1. Member, Dibrugarh University Court, 03.03.2011 - 02.03.2014
  2. Chairperson, Departmental Research Committee, 02.07.2012 - 01.07.2015
  3. Chairperson, Board of Studies in Chemistry, DU, 02.07.2012 - 01.07.2015
  4. Chairperson, Departmental Management Committee (DMC), for three terms of one year each for (i) June, 2009 – May, 2010 and ii) June, 2002 - May, 2004
  5. Member, Academic Council, DU, 02.07.2012 - 01.07.2015
  6. Member, Research Council in Science, DU, 02.07.2012 - 01.07.2015
  7. Head, Department of Chemistry, DU, 02.07.2012 - 01.07.2015

Membership in Committees/Boards of other Institutions

  1. Court Member, Bodoland University for a period of 3 years w.e.f. January, 2020.
  2. Member, Governing Body, Sibsagar Girls' College, Sivasagar for a period of 3 years w.e.f. 18.07.2018
  3. Member, Governing Body, DHSK College, Dibrugarh for a period of 3 years w.e.f. 04.01.2018
  4. Member, Academic Council, North Lakhimpur College (Autonomous) for a period of 3 years w.e.f. 01.06.2016
  5. Member, Board of Post Graduate Studies (BPGS) in Chemistry, North eastern Hill University (NEHU) for a period of 3 years w.e.f. 25.08.2010

Students' Administrative Activity

·     Warden, Joymati Chatri Nivas (JCN - DU Girls' Hostel No. 1) (2005-2011)

Membership, Professional Organisation

  • Vice President, Dibrugarh University Teachers' association (DUTA) (2013-2014)
  • Life Member, Chemical Research Society of India (CRSI)
  • Life Member, Association of Chemistry Teachers (ACT)
  • Life Member, Society for Chemical Education, Assam (SCEA)
  • Life Member, North East Biotechnological Association (NEBA)

Other Educational Extension Activities

Actively engaged in Popularisation of science through delivering lectures, participating in interactive sessions, writing popular science articles in newspapers and magazines.

Worked as a Mentor in the DST sponsored INSPIRE INTERNSHIP PROGRAMME (SCIENCE CAMP), organized by Sibsagar Girls' College, Sivasagar on 8-12 April, 2014, And there, delivered talks on

1.Organic Chemistry at Your Service (For career and for the service of mankind)

2.My Journey with Organic Chemistry: A Dendritic Quest for Phenolic Antioxidants of Synthetic and Natural Origin

Academic Distinction

  1. Secured Second Position in Pre-Degree (Science) Examination of Dibrugarh University
  2. Qualified in Joint CSIR-UGC National Eligibility Test (NET) for JRF in 1988
  3. Jogendra Nath Borbora Memorial Award for securing highest marks in Chemistry Major in B.Sc. Examination, 1984 from J B College, Jorhat
  4. Jayanta Madhab Borthakur Memorial Award for securing highest marks in Chemistry Major in B.Sc. Examination, 1984 from J B College, Jorhat
  5. National Merit Scholarship H.S.L.C. Exam onward

 Honours/Awards/Recognitions that have been received by the Research Scholars

Publications

Research Publications

A) Research papers, published in Peer-reviewed Journals

  1. Bidyot Bikash Gogoi, Md Yeasin, Ranjit Kumar Paul, Diganta Deka, Harisadhan Malakar, Jiban Saikia, Feroze Hasan Rahman, C.S. Maiti, Animesh Sarkar, Jyotirekha G. Handique, Bappaditya Kanrar, A.K. Singh, Tanmoy Karak,* (2024) Pollution indices of selected metals in tea (Camellia sinensis L.) growing soils of the Upper Assam region divulge a non-trifling menace of National Highway, Science of the Total Environment 920, 170737, Elsevier, IF: 9.8
  2. Nishi Gandha Gogoi, Aziza Rahman, Pankaj Dutta, Jiban Saikia, Anupaul Baruah, and Jyotirekha G Handique (2024) Design, synthesis, biological evaluation and in silico studies of curcumin pyrrole conjugates, Chemistry and Biodiversity, 2024, e202301605, https://doi.org/10.1002/cbdv.202301605, Wiley online. IF: 2.9 (Clarivate)
  3. Jitupon Gogoi, Shyamalima Saikia, Pankaj Chetia, Bolin Chetia, Jyotirekha G. Handique* (2024) Design and synthesis of novel coumarin based 1,2,3-triazole derivatives and their antibacterial evaluation, Russian Journal of Bioorganic Chemistry, Springer, Accepted, IF: 1.0
  4. Arup Borgohain, Mridushmita Sarmah, Bidyot Bikash Gogoi, Kaberijyoti Konwar, Jyotirekha G. Handique, Ranjit Kumar Paul, Md. Yeasin, Versha Pandey, Ranu Yadav, Harisadhan Malakar, Jiban Saikia, Diganta Deka, Feroze Hasan Rahman, Saumik Panja, Puja Khare, Tanmoy Karak* (2023) Can tea pruning litter biochar be a friend or foe for tea plants (Camellia sinensis L.) growth and regulators?: Feasible or fumes of fancy, Industrial Crops and Products, 194, 116394, https://doi.org/10.1016/j.indcrop.2023.116394, Elsevier, IF: 6.449
  5. Mridusmita Sarmah, Arup Borgohain, Bidyot Bikash Gogoi, Md Yeasin, Ranjit K. Paul, Harisadhan Malakar, Jyotirekha G. Handique, Jiban Saikia, Diganta Deka, Puja Khare, Tanmoy Karak (2023) Insights into the effects of tea pruning litter biochar on major micronutrients (Cu, Mn, and Zn) pathway from soil to tea plant: An environmental armour, Journal of Hazardous Material, 442, 129970, https://doi.org/10.1016/j.jhazmat.2022.129970, Elsevier, IF: 14.224
  6. Nishi Gandha Gogoi, Pankaj Dutta, Jiban Saikia and Jyotirekha G. Handique (2022), Antioxidant, Antibacterial, and BSA Binding Properties of Curcumin Caffeate Capped Silver Nanoparticles Prepared by Greener Method, ChemistrySelect, 7 (48), e202203989, https://doi.org/10.1002/slct.202203989, Wiley-VCH, IF:2.307
  7. Nishi Gandha Gogoi, Aziza Rahman, Jiban Saikia, Pankaj Dutta, Anupaul Baruah, and Jyotirekha G. Handique (2022), Enhanced biological activity of Curcumin Cinnamates: an experimental and computational analysis, Medicinal Chemistry Research,31, 2195–2208, https://doi.org/10.1007/s00044-022-02977-w, Springer, IF: 2.351
  8. Arup Borgohain, Mridusmita Sarmah, Kaberijyoti Konwar, Rimjim Gogoi, Bidyot Bikash Gogoi, Puja Khare, Ranjit Kumar Paul, Jyotirekha G. Handique, Harisadhan Malakar, Diganta Deka, Jiban Saikia, Tanmoy Karak (2022), Tea pruning litter biochar amendment in soil reduces arsenic, cadmium, and chromium in made tea (Camellia sinensis L.) and tea infusion: A safe drink for tea consumers, Food Chemistry:X, 13, 100255, https://doi.org/10.1016/j.fochx.2022.100255, Elsevier, IF: 6.443
  9. Bidyot Bikash Gogoi, Arup Borgohain, Kaberijyoti Konwar, Jyotirekha G. Handique, Ranjit Kumar Paul, Puja Khare, Harisadhan Malakar, Jiban Saikia, Tanmoy Karak  (2021), National highway induced selected chemical properties of soils across tea bowl of India: scale and assessment, International Journal of Environmental Science and Technology, 19, 12019–12038 https://doi.org/10.1007/s13762-021-03789-y , Springer, IF: 2.86
  10. Hanan Mohamed Fathy Elnagdy, Nishi Gandha Gogoi, Jyotirekha G. Handique, Diganta Sarma (2021), CuO-NPs/TFA: a New Catalytic System to Synthesize a Novel Series of Pyrazole Imines with High Antioxidant Properties, BioNanoScience, https://doi.org/10.1007/s12668-021-00888-5, Springer, IF:3.0
  11. Nishi Gandha Gogoi and Jyotirekha G. Handique* (2019), Novel Protocol for Synthesis of 1,4-Diimino Curcumin Stabilized Silver nanoparticles and Application as Heterogenous
    Recyclable Catalyst and Antibacterial Agent, Journal of Chemical Sciences131, 74. https://doi.org/10.1007/s12039-019-1654-1, Springer, IF: 1.573
  12. Gyanashree Bora, Dipankoj Gogoi, Subhasmita Saikia, Archana Pareek and Jyotirekha G. Handique* (2019), Stannous Chloride Catalyzed Synthesis of Schiff Bases from Hyhydroxybenzaldehydes and Determination of Their Antioxidant Activity by ABTS and DPPH Assay, Journal of Chemical Sciences,131, 68, https://doi.org/10.1007/s12039-019-1645-2, Springer, IF: 1.573
  13. Prodip K. Goswami, Monsum Kashyap, Pranjal P. Das, Prakash J. Saikia & Jyotirekha G. Handique (2019), Poly(Glycidyl Methacrylate-co-Octadecyl Methacrylate) particles by dispersion radical copolymerization, Journal of Dispersion Science and Technology, http://doi.org/10.1080/01932691.2019.1635026, Taylor and Francis, IF: 2.262
  14. Dipankoj Gogoi, Gyanashree Bora, Romesh Borgohain, Jyotirekha G. Handique* (2018), Antioxidant Capacity and GC-MS Analysis of Hexane, Ethylacetate and Methanol Extracts of Ficus bhotanica – A Potential Folklore Medicinal Plant, International Journal of Pharmacognosy and Phytochemical Research,10(5); 201-212
  15. Romesh Borgohain, Jyotirekha G. Handique*, Ankur Kanti Guha, Sanjay Pratihar (2017), A Theoretical Study of Antioxidant Activity of Some Schiff Bases Derived from Biologically Important Phenolic Aldehydes and Phenylenediamines, Journal of Physical Organic Chemistry, 2017;e3757. http://doi.org/10.1002/poc.3757 (Wiley online), IF: 2.391
  16. Gitalee Sharma*, Jyotirekha G. Handique (2016) Synthesis of Series of Low Band Gap Small Organic Molecules and Evaluation of Their Solar Cell Activity, Asian Journal of Chemistry, 28(10), 2223-2227
  17. Romesh Borgohain, Jyotirekha G. Handique*, Ankur Kanti Guha, Sanjay Pratihar (2016), A Theoretical Study on Antioxidant Activity of Ferulic Acid and its Ester Derivatives, Journal of Theoretical and Computational Chemistry, 15(4), 1650028, http://doi.org/10.1142/S0219633616500280, World Scientific, IF: 2.44
  18. Jyotirekha G. Handique*, Dipankoj Gogoi (2016), Antioxidant Activities of the Medicinal Plants Used for Preparation of Fermentation Cakes of “Haanj”, the Rice Based Alcoholic Beverage of Ahom Community People of Assam, India, International Journal of Pharmacognosy and Phytochemical Research; 8(2); 217-22
  19. Alakesh Phukan, Bolin Chetia, Jyotirekha G. Handique and Devid Kardong (2016) Antimicrobial and Antioxidant Activities and RP-HPLC Analysis of Three Edible Medicinal Plants Olax acuminata, Gnetum gnemon and Raphidophora hangkongensis, National Academy Science Letters(published online: 9 Feb, 2016) http://doi.org/10.1007/s40009-016-0422-8, Springer, IF: 0.788
  20. Romesh Borgohain, Ankur Kanti Guha, Sanjay Pratihar and Jyotirekha G. Handique* (2015) Antioxidant Activity of Some Phenolic Aldehydes and Their Diimine Derivatives: A DFT Study, Computational and Theoretical Chemistry, 1060, 17-23, http://doi.org/10.1016/j.comptc.2015.02.014 Elsevier, IF: 2.29
  21. Manas Pratim Boruah*, Jyotirekha. G. Handique (2014) Antioxidant and Antibacterial Properties of some Traditional Medicinal Plants of North East India, International Journal of Advances in Pharmacy Biology and Chemistry, 3(3), 543-549
  22. Manas Pratim Boruah*, Jyotirekha. G. Handique (2014) Antioxidant Behavior of some North East Indian Ethno Medicinal Vegetables and their RP-HPLC Analysis, International Journal of Advances in Pharmacy Biology and Chemistry, 3(2), 426-433
  23. Jyotirekha G. Handique*, Dhrubajyoti Mahanta, Archana Devi and Manas Pratim. Boruah (2013) Synthesis and Electrochemical Behavior of Some Dendritic Polyphenols as Antioxidants, Letters in Organic Chemistry, 10(1), 53-59, Bentham Science, IF: 0.867
  24. Jyotirekha G. Handique*, Manas Pratim Boruah and Dipika Kalita (2012) Antioxidant activities and total phenolic and flavonoid contents in three indigenous medicinal vegetables of North-east India, Natural Product Communications,7(8), 1021-1023, Sage Journals, IF: 0.986
  25. Manas Pratim Boruah, Dhrubajyoti Mahanta and Jyotirekha G. Handique* (2012) Comparative evaluation of antioxidant activities of some fresh and preserved herbal products of North East India by cyclic voltammetry, Indian Journal of Natural Products and Resources,3(1), 40-47, CSIR-NIScPR.
  26. Dipika Kalita, Rahul Kar, Jyotirekha G. Handique (2012) A Theoretical Study on the Antioxidant Property of Gallic Acid and its Derivatives, Journal of Theoretical and Computational Chemistry, 11(2), 391-402, World Scientific, IF: 2.44
  27. Dhrubajyoti Mahanta and Jyotirekha G. Handique* (2011) Simple, Clean and Highly Efficient Synthesis of Polyphenolic Amides Catalysed by Ferric Exchanged Montmorillonite, Letters in Organic Chemistry, 8(9), 618-624, Bentham Science, IF: 0.867
  28. Dhrubajyoti Mahanta and Jyotirekha G. Handique (2011) Highly efficient esterification of phenolic acid over metal exchanged montmorillonite clay, Asian Journal of Science and Technology, 4, 51-58
  29. Jyotirekha G. Handique*, Moushumi Hazarika, Manas Pratim Boruah and Pradip K. Gogoi (2011) Antioxidant activities of some North East Indian ethnomedicinal plants by Cyclic voltammetry, National Academy Science Letters, 34(3&4), 83-91, Springer, IF: 0.788
  30. Jyotireka G. Handique, Jubaraj B. Baruah* (2003) The Oligomer of 1,2,3-trihydroxybenzene with benzaldehyde, Reactive and Functional Polymers, 55, 319-332, Elsevier, IF: 3.975
  31. Jyotirekha G. Handique, Jubaraj B. Baruah* (2002) Polyphenolic Compounds: An Overview (Review), Reactive and Functional Polymers, 52, 163-188 (rated as one of the TOP 25 HOTTEST ARTICLES in several periods), Elsevier, IF: 3.975
  32. Jyotirekha G. Handique, Jubaraj B. Baruah* (2002) Conversion of 1,4-naphthalenediol to 1,4-naphthoquinone by 1,4-benzoquinone, Journal of Molecular Catalysis A: Chemical 184, 85-93, Elsevier, IF: 5.062
  33. Jyotirekha G. Handique, L. Baruah, Rupam J. Sharma and Jubaraj B. Baruah* (2002) Participation of Self-generated polyaniline support in copper(II) catalysed oxidative reaction of phenyl aldimines, Journal of Molecular Catalysis A: Chemical, 188, 63-69, Elsevier, IF: 5.062
  34. Jyotirekha G. Handique, Jubaraj B. Baruah* (2001) The oligomer of 1,6-naphthalenediol as a support in oxidative reactions of cis-bis glycinato copper(II) and hydrogen peroxide, Journal of Molecular Catalysis A: Chemical, 172, 19-23, Elsevier, IF: 5.062
  35. Jyotirekha G. Handique, Arup Purkayastha, Jubaraj B. Baruah* (2001) Reduction of α,β-unsaturated carbonyl compounds by Ni2+/BH4-, Journal of Organometallic Chemistry, 620, 90-93, Elsevier, IF: 2.369
  36. Jyotirekha G. Handique, Jubaraj B. Baruah* (2001) Oxidative oligomerisation of 2-naphthol by cis-bis glycinato copper(II) Journal of Molecular Catalysis A: Chemical, 166, 225-231, 2001, Elsevier, IF: 5.062
  37. Amrit Puzari, Jyotirekha G. Handique, Arup Purkayastha, A. Srinivasan and Jubaraj B. Baruah* (1999) Thermoelectric switch from anilinic compounds, Indian Journal of Chemistry, 38A, 521-524, CSIR-NIScPR, IF: 0.491
  38. Jyotirekha Gogoi* and Pabitra K. Sarma (1997) Chemical investigation of Vangueria spinosa II, Indian Drugs, 34(109), 610-611

B) Research papers, published in Conference Proceedings

  1. Jyotirekha G. Handique, Dipika Kalita and Pratap J. Handique (2017) A correlation study of antioxidant activity, total phenolic content and total flavonoid content of fruits of Solanum species of North East India, 2nd International Conference on Herbal and Traditional Medicine (HTM-2017), 25-27 January, Hosted by Khon Kaen Univ., Bangkok, Thailand
  2. Jyotirekha G. Handique and Jubaraj B. Baruah (2001) Thermochemical properties of naphthalenediol oligomers, The 6th Asian Thermophysical Society Conference, 8-11 October, Gauhati Univ.
  3. Jyotirekha Gogoi and Pabitra K. Sarma (1993) Chemical investigation of Meyna laxiflora Robyns. syn Vangueria spinosa Roxb. III Proc. Natl. Seminar on Chemical Reactivity: Recent Trends, 23-25 Nov, Gauhati Univ
  4. Jyotirekha Gogoi* and Pabitra K. Sarma (1992) Chemical investigation of Vangueria spinosa Roxb. I, Proc. Natl. Seminar on Modern Trends in Anal. Tech.: Applications in Chemistry, 4-6 May, Gauhati University

*Gogoi was my maiden title

C) Book Chapters

  1. Upasana Bhuya and Jyotirekha G. Handique, Plant polyphenols as potent antioxidants: Highlighting the mechanism of antioxidant activity and synthesis/development of some polyphenol conjugates, Chapter 6, p. 243-266, In Studies in Natural Products Chemistry: Bioactive Natural Products, Vol. 75, Atta-ur-Rahman (Ed.), Elsevier, Amsterdam, Netherlands, ISBN: 978-0-323-91250-1, ISSN: 1572-5995, 2022
  2. Nishi Gandha Gogoi and Jyotirekha G. Handique, Biosurfactants being a potential alternative to the chemical surfactants available in the market, Chapter 9, p. 153-180 In Advanced Research in Chemistry, Vol. 4, D. T. Sakhare (Ed.), AkiNik Publications, Delhi, ISBN: 978-93-5570-297-5, Book DOI: https://doi.org/10.22271/ed.book.1800, 2022
  3. Gyanashree Bora and Jyotirekha G. Handique, Oxidation of Lignin from Wood Dust to Vanillin Using Ionic Liquid Medium and Study of Its Antioxidant Activity, Chapter 15, p. 277-296, In Re-Use and Recycling of Materials: Solid Waste Management and Water Treatment, Editors Jibin K. P., Nandakumar Kalarikkal, Sabu Thomas and Ange Nzihou, River Publishers, Denmark and The Netherlands, ISBN: 978-87-7022-058-3 (Hardback), 978-87-7022-057-6 (Ebook), 2019
  4. Jyotirekha G. Handique, Polyphenols as Antioxidants, Chapter 4, In “Chemistry of Phenolic Compounds: State of the Art”, J.B. Baruah (Ed), Nova Science Publishers, 2011 (ISBN 978-1-61761-335-7), New York, p 31-48.

D) Research papers/posters, presented in Seminars/Conferences, that received Awards

  1. Archana Devi and Jyotirekha G. Handique* (2011) International Conference on Emerging Areas of Chemistry, 12-14 January, 2011, at Tripura University in association with IACS, Kolkata: Best Poster Award

E)Seminar/Conference/Workshop/Training Programme, attended/ Paper presented

  1. 2nd International Conference on Herbal and Traditional Medicine (HTM-2017), 25-27 January, 2017, Hosted by Khon Kaen Univ., at Asia Hotel, Bangkok, Thailand
  2. International Training Programme on Leadership and Career Development for Women Scientists/Technologists, organised by DST & IUSSTF& COACh-University of Oregon, USA at INSA, New Delhi, 1-5 Sept. 2014
  3. International Conference on Harnessing the sub-Himalayan Plant Diversity for Human Welfare, Dibrugarh University, 11-13 March 2015
  4. National Seminar on Recent Trends in Fundamental and Applied Chemical Sciences, Dept. of Chemistry, Dibrugarh University, 19-21 November, 2014
  5. 18th International Conference (Post ISCBC- 2012) Perspective and Challenges in Chemical and Biological Sciences: Innovation Cross Roads, IASST, Guwahati, 28-30 Jan, 2012 (Oral presentation)
  6. International Conference on Emerging Areas of Chemistry, held at the Department of Chemistry, Tripura University in association with Indian Association for Cultivation of Science, Kolkata, 12–14 Jan, 2011, Received the Best Poster Presentation award in the Conference.
  7. National Seminar on Recent Advances in Synthesis and Catalysis, Dept of Chemistry, Dibrugarh University,10-12 Feb, 2011
  8. National Seminar on Recent Advances in Chemical Sciences, Dept. of Chemistry, Dibrugarh University, 27-28 March, 2009.
  9. National Seminar on Biodiversity Conservation and Future Concern, Dept. of Biotechnology, GU, June 17-18, 2005
  10. DST sponsored National Workshop on Sensors for Agricultural and Industrial Application, Dept. of Physics, Dibrugarh University, 20–Oct 1, 2004
  11. National Seminar on medicinal plants in North Eastern Region, Govt. Ayurvedic College, Guwahati, 7 – 10 Oct, 2004.
  12. JNCASR sponsored Frontier Lectures in Chemistry, IIT-Guwahati, Aug 29-30, 2003
  13. The 6thAsian Thermophysical Society Conference, Gauhati University, 8-11 Oct., 2001
  14. Workshop cum Training Programme on Utilization, Plantation and Conservation of Medicinal Plants, Gauhati University, 16-17 May, 1997
  15. Assam Science Society Annual Technical Session, Dibrugarh University, 28 Dec, 1993
  16. National Seminar on Chemical Reactivity: Recent Trends, Gauhati University, 23-25 Nov, 1993
  17. National Seminar on Modern Trends in Anal. Tech.: Applications in Chemistry, Gauhati University, 4-6 May, 1992.

Plenary Lecture/Invited Talk delivered

  1. Invited Talk on “Effective online Teaching Strategies in Higher Education” in a Faculty Development Programme (FIP-04) Aug 2-31, 2021, organized by UGC-HRDC, Gauhati University, on 17th August, 2021
  2. Invited Talk on “Use of Digital Platforms for Education in India during Covid-19 situation” in a National Webinar organised by Biswanath College on 13th July, 2020
  3. Invited Talk on “SWAYAM: A New Dimension in Teaching and Learning” in the Refresher Course in Environmental Studies (ID), 24 Sep-14 Oct, 2018, organized by UGC-HRDC, Gauhati University, on 3rd October, 2018 
  4. Teachers’ Day Talk, organised by Department of Chemistry Dibrugarh University, 5thAugust, 2018 on the topic “SWAYAM: A New Dimension in Teaching and Learning”
  5. One-Day Orientation Workshop on SWAYAM and MOOCs, organised by SWAYAM Cell, IQAC, DHSK College and Assam College Teachers Association (ACTA), DHSK College unit, DHSK College, Dibrugarh, 30th August, 2018 (Invited Talk on “MOOCs for SWAYAM: Role of EMRCs”)
  6. One-Day State Level Workshop on SWAYAM, organised by Kakojan College, Kakojan, 25th August, 2018 (Invited Talk on “MOOCs for SWAYAM: Role of EMRCs”)
  7. One-Day Workshop on SWAYAM, organized by Department of Commerce in collaboration with Internal Quality Assurance Cell (IQAC), Margherita College, Margherita, 7th June 2018 (Invited Talk on “SWAYAM: The Digital Platform for Education: Anytime-Anywhere –Anyone”)
  8. National Seminar on Indigenous Health Practices with special reference to the Tribes of North East India, Department of Anthropology, DU, 22-23 March, 2013 (Plenary Lecture) (Topic: Antihepatotoxic Activities of Some Medicinal Plants of North-East India)
  9. Invited Lecture Programme by Women Studies Cell, MDKG College, Dibrugarh, 9thJune, 2012 (Topic: Women in Science and Technology-Perspectives and Challenges)
  10. National Workshop on Gender Budgeting and Women Empowerment, Sponsored by the Ministry of Women and Child Development, Govt. of India at Centre for Women Studies, DU, 14-16 March, 2012(Topic: Women in Science and Technology and Gender Budgeting)
  11. National Workshop on Drug precursors from Natural Resources under SAP-DRS-Iprogramme, Department of Chemistry, D.U., 29th March, 2011 (Topic: Quest for Antioxidants: In Nature and in Synthetic Ways)

Other Publications of Professional Interest

Contribution to compiled volume of literary work

  1. Contributed write-ups on science topics for "Bishwakosh" (Encyclopaedia), published by Asam Sahitya Sabha
  2. Contributed a chapter on History of Chemistry in a book titled “Bigyanor Itihas” (“History of Science”), Publication division, Dibrugarh University, page 279-398, 2023

Other interests

  1. Creative writing (Short stories, thought provoking articles, musing on personal experiences).
  2. Academic administration activities
  3. Women empowerment programmes

(1) Creative writings

  1. Prohoree (A short story) published in JBianor Nirbachito Galpa (Selected Short Stories from JBian – The College Magazine of J. B. College, Jorhat), published by Publication Cell of Jagannath Barooah College (Autonomous) 2022, p. 299-303
  2. Maar Taantshal (Mom’s Loom), Amar Asom (An Assamese Daily), October 6 and 8, 2020
  3. Joy of being known by name, Smriti Saurobh (Souvenir of First Alumni Meet, Dept. of Chemistry, DU), 28 Dec, 2017, p. 17-22
  4. Gharee (The Clock), Nahor Deshor Galpa (A collection of short stories, published by DU Yuva Chatra Mancha), April, 2014, p. 32-37 [Earlier published in Prantik, The Assamese Fortnightly Magazine, 2008, 27(7), p. 52-54 and also in Amar Asom, (Short Story)
  5. Janapriyatar sadhana banam utkristatar sadhana (Quest for popularity vs. quest for Excellence), DUPGSU Magazine, 2010, p. 44-46 (Article)
  6. Shikshakatar Glamour: Medhai jar mul bheti (Glamour of teaching: where talent is the basis), DUPGSU Magazine, 2008, p. 17-19 (Article)
  7. Morijanjit ejobora (A plunge in the dead river ‘Morijanji’), Amar Asom, The Assamese Daily, 2010, June 13-14 (Story)
  8. Raamdhanu (The Rainbow), Amar Asom, The Assamese Daily, 2008, Aug 31, p. 6-7(Story)
  9. Madhurena samapayet (Ending with a Sweetnote), Amar Asom, The Assamese Daily, 2008, Feb. 9, p. 4, Story
  10. Chaka (The Wheel), Amar Asom, The Assamese Daily, 2007, Dec. 15, p. 4, (Story)
  11. Maar chasma (Mom’s spectacles), Saatsori, The Assamese Fortnightly Magazine, 2006, July 1-15, p. 50, (Story)
  12. Katha kuthambolom (The Saga of the Kuthambolom: The indigenous amphitheatre of Kerala), Saatsori, 2006, May 1-15, p. 60-62, Translated from ‘The God of Small Things’
  13. Byoktigata aru anusthanik (Personal and Institutional), Saatsori, The Assamese Fortnightly Magazine, 2005, Aug 15-31, p. 20-21, (Article)
  14. Methoni baganot esandhya (An evening at the Methoni Tea Estate), Amar Asom, The Assamese Daily, 2004, Aug 7, p. 4, (Story)
  15. Chorailoi sholagor suhuri (Thanking the birds), Purbachal, (The Sunday supplement of Amar Asom, The Assamese Daily), 2002, Oct. 13, p. 18&14, (Story)
  16. Ipsita (Oicchik) santanhinatar dharana (Principle of Optional Childlessness), Amar Asom, The Assamese Daily, 2002, Jan 3, p. 3, (Article)
  17. To have or not to have, North East Times (High Point), 1995, Sept 24, (Article)

(2) Popular Science Publications

  1. Vigyaane ki bichare? Eeshwarok ne Satyok? (What does science search for? God or Truth?), Niyomiya Barta, The Assamese Daily, 2018, March 15
  2. Sheri: A Call for Occupational Safety, ChemiDUscope, (A science magazine, published by Department of Chemistry, DU) Vol 1, September 5, 2016, p. 13-17
  3. Antarjatik rasayanbarsha, pratyahban aru sambhabana (International Year of Chemistry, Challenges and Prospects), Dainik Janambhumi, The Assamese Daily, 2011, Mar 23, p. 4
  4. Kharga (The Rhinohorn), Amar Asom, The Assamese Daily, 2008, Feb 26, p. 4
  5. Premor bignan aru bibartanbad (The Science and Evolution of ‘Love’), Saatsori, The Assamese Fortnightly Magazine, 2006, June 1-15, p. 24-27
  6. Wise management of waste, My Green Earth, 2002, Feb-Mar, 2(3), 4-6
  7. Being rationally herbal, North East Times (High Point), 2000, Feb 6, p. 3
  8. Kotkora gach (Meyna laxiflora tree), Prantik, The Assamese Fortnightly Magazine, 2006, March 16, p. 35-36
  9. Andhabiswas banam mukta manasikata, (Superstition vs. open mindedness), Amar Asom, The Assamese Daily, 2004, Aug 30, p. 4
  10. Prasadhan samagrir rasayan (Chemistry of cosmetics), Payobhara, 2002, Nov, p. 10-12
  11. Mor mother’s day card: Kola mekuree nedekhile (My mother’s day card : When no ‘black cat’ is seen!), Amar Asom, The Assamese Daily, 2002, May 12, p. 6
  12. Aksharam paramam brahmam (Literacy is the absoluteness), Amar Asom, 2002, Mar 11, p. 4
  13. Asustha namrata (Unhealthy politeness), Amar Asom, The Assamese Daily, 2002, Feb 14, p. 4
  14. Bonoushadhi, Biswakosh aru Asomiya manuhor udyam (1) and (2) (Herbal-drug, Encyclopedia and the Assamese spirit), Amar Asom, The Assamese Daily, 2001, Nov 27-28, p. 3
  15. Daini-hatya, Biswakarma puja, Aranyam sewa ityadi (Witch-killing, Biswakarma Puja, ‘Aranyam Sewa’ etc.), Amar Asom, The Assamese Daily, 2001, Oct 25, p. 3
  16. Dainik byabahrita samagrit rasayanik padartha (Chemicals in daily used products), Payobhara, 2001, June, p. 28-30
  17. Janapriya starat bignan shikshar prachar (Extension of science education at popular level), Angik, 2001, April, p. 17-20
  18. Bardhakya (Ageing), Payobhara, 2001, Feb, p. 21-22
  19. Keshcharcchar samagri: Rasayan aru byabasay (Hair-care products: Chemistry and trade), Payobhara, 2000, Nov, p. 20-22
  20. Bharatat aborjanar pora shakti utpadan (Generation of energy from waste in India), Payobhara, 2000, June, p. 12-15
  21. Peloniya dravyar suphaladayak byabastha (Fruitful management of waste), Payobhara, 1999, Sept, p. 36-38
  22. Paribesh sangrakshanat mahilar bhumika (Role of women in protection of environment), Payobhara, 1999, July, p. 21-23
  23. Paribeshar sampadsamuh (The wealth of the environment), Payobhara, 1999, Mar, p. 13-14
  24. Cancerkarak rasayanik dravya (Carcinogenic chemicals), Payobhara, 1998, June, p. 36-38
  25. Kuhumkanta, ebidh oushadhi udbhid (Kuhumkata, a medicinal plant), Payobhara, 1996, June, p. 25
Profile

Profile

Educational Qualifications

  • M.Sc. (Gauhati University)
  • Ph.D. (Indian Institute of Technology-Guwahati)

Specialization: Organic Chemistry

Contact: jghandique@rediffmail.com

Professional Experience

12.05.2013 - till date 

Professor, Dept. of Chemistry, DU

01.01.2018 - 30.06.2019

Director (Honorary)
Educational Multimedia Research Centre (EMRC), DU

02.07.2012 - 01.07.2015

Head, Department of Chemistry, DU

12.05.2010 - 11.05.2013

Associate Professor, Dept. of Chemistry, DU

12.05.2007 - 11.05.2010

Reader, Dept. of Chemistry, DU

09.01.2001 – 11.05.2007

Senior Lecturer, Dept. of Chemistry, DU

29.03.1994 - 08.01.2001

Lecturer, Dept. of Chemistry, DU

Worked as Part time faculty

  1. Centre for Women Studies, DU to teach Science, Technology and Women, Upgradation of Technology Skills and Rural Technology in PGCC in Women’s Studies in 2006
  2. Centre for Bioinformatics Studies, DU, to teach Biochemistry in M.Sc. in Bioinformatics in 2010-11.

Area of interest

  • Synthetic Organic Chemistry and Natural Products Chemistry

Area of research       

  • Synthesis of dendritic polyphenols and studies of their antioxidant properties
  • Antioxidant properties of herbal food and beverages of North East India
  • Chemical investigation of medicinal plants of North East India

Research guidance

M. Phil.: 6 (Degree awarded)

1. Prakash Upadhyay

Chemical Investigation of Stephania hernandifolia, A less known medicinal plant species of Assam, used for antifertility

2. Manas Pratim Boruah

Evaluation of Antioxidant Properties of Some Herbal Food Additives and Beverages of North East India

3. Moushumi Hazarika

Studies on Antioxidant and Antibacterial Properties of Some Medicinal Plants of North East India

4. Nishi Gandha Gogoi

Studies on Curcumin Derived Imines as Antioxidant and Stabilizer for Nanosilver Catalyst

5. Jhorna Borah

Synthesis of Some Phenolic Schiff Bases and Evaluation of their Antioxidant, Antibacterial and Ion Sensing Properties

6. Madhusmita Baruah

Hydrogel Composite Fertilizer for Slow Phosphorous Delivery for Agricultural Application

 

Ph.D.: Degree awarded: (8)            

Names of the scholars

Title of Thesis

1. Dr. Manas Pratim Boruah

Studies on antioxidant and antimicrobial activities of some traditional medicinal plants and preserved food additives of North East India

2. Dr.(Ms.) Dipika Kalita

Studies on phenolic antioxidants of some medicinal plants of Assam

3. Dr. Dhrubajyoti Mahanta

Design, synthesis and studies of some important properties of dendritic polyphenols

4. Dr. Dipankoj Gogoi

Studies on antioxidant activities of some traditional alcoholic beverages of Assam and the plants used in their fermentation cakes

5. Dr. Romesh Borgohain

Development of Synthetic Protocols and Physicochemical Studies of Derivatives of Phenolic Acids and Aldehydes

6. Dr. Gyanashree Bora

Synthesis of Some Phenolic Schiff Bases and Study of Their Applications

7. Dr. Mridusmita Sarmah

Biochar from Tea Waste and its Application for Sustainable Tea Cultivation: Utilizing the Unutilized

8. Dr. Nishi Gandha Gogoi

Synthesis and Studies of Biological Activities of some Curcumin Conjugates and Their Role in Nanoformulations

Ph.D.: Present Group: (5)

Bidyot Bikash Gogoi (Thesis submitted), Pradip Kumar Goswami, Jitupon Gogoi, Upasana Bhuyan, Kaberijyoti Konwar

Research projects

1) Synthesis, characterization and physicochemical properties of some polyphenols with simple dendritic architecture: Funded by DST, Govt. of India (2008-2012) (Principal Investigator)

Amount: Rs. 31 lakh

2) Chemical prospecting of certain less known medicinal plant species of Assam used for antifertility: Funded by G B Pant Institute of Himalayan Environment and Development (GBPIHED), Govt. of India, (2004-2008) (Principal Investigator)

Amount: Rs. 8.5 lakh

3) A scientific study of medicinal properties of some unexplored ethno-medicinal plants of North-East India: (SAP-DRS-I): Funded by UGC, Govt. of India (2008-2013) (Deputy Co-ordinator)

Amount: Rs. 39 lakh

Reviewer of various Journals, viz., RSC Advances, European Journal of Medicinal Chemistry, National Academy Science Letters, Natural Product Research, Journal of Food and Nutritional Disorders, Advances in Pharmacological Sciences

Seminar organised

Organising Secretary, National Seminar on Recent Advances in Chemical Sciences, held in Department of Chemistry, DU on 26-27 March, 2009

Chairperson, Organising Committee, National Seminar on Recent Trends in Fundamental and Applied Chemical Sciences, held in Department of Chemistry, DU, on 19-21 November, 2014

Other Academic and Administrative Assignments

  1. Member, Dibrugarh University Court, 03.03.2011 - 02.03.2014
  2. Chairperson, Departmental Research Committee, 02.07.2012 - 01.07.2015
  3. Chairperson, Board of Studies in Chemistry, DU, 02.07.2012 - 01.07.2015
  4. Chairperson, Departmental Management Committee (DMC), for three terms of one year each for (i) June, 2009 – May, 2010 and ii) June, 2002 - May, 2004
  5. Member, Academic Council, DU, 02.07.2012 - 01.07.2015
  6. Member, Research Council in Science, DU, 02.07.2012 - 01.07.2015
  7. Head, Department of Chemistry, DU, 02.07.2012 - 01.07.2015

Membership in Committees/Boards of other Institutions

  1. Court Member, Bodoland University for a period of 3 years w.e.f. January, 2020.
  2. Member, Governing Body, Sibsagar Girls' College, Sivasagar for a period of 3 years w.e.f. 18.07.2018
  3. Member, Governing Body, DHSK College, Dibrugarh for a period of 3 years w.e.f. 04.01.2018
  4. Member, Academic Council, North Lakhimpur College (Autonomous) for a period of 3 years w.e.f. 01.06.2016
  5. Member, Board of Post Graduate Studies (BPGS) in Chemistry, North eastern Hill University (NEHU) for a period of 3 years w.e.f. 25.08.2010

Students' Administrative Activity

·     Warden, Joymati Chatri Nivas (JCN - DU Girls' Hostel No. 1) (2005-2011)

Membership, Professional Organisation

  • Vice President, Dibrugarh University Teachers' association (DUTA) (2013-2014)
  • Life Member, Chemical Research Society of India (CRSI)
  • Life Member, Association of Chemistry Teachers (ACT)
  • Life Member, Society for Chemical Education, Assam (SCEA)
  • Life Member, North East Biotechnological Association (NEBA)

Other Educational Extension Activities

Actively engaged in Popularisation of science through delivering lectures, participating in interactive sessions, writing popular science articles in newspapers and magazines.

Worked as a Mentor in the DST sponsored INSPIRE INTERNSHIP PROGRAMME (SCIENCE CAMP), organized by Sibsagar Girls' College, Sivasagar on 8-12 April, 2014, And there, delivered talks on

1.Organic Chemistry at Your Service (For career and for the service of mankind)

2.My Journey with Organic Chemistry: A Dendritic Quest for Phenolic Antioxidants of Synthetic and Natural Origin

Academic Distinction

  1. Secured Second Position in Pre-Degree (Science) Examination of Dibrugarh University
  2. Qualified in Joint CSIR-UGC National Eligibility Test (NET) for JRF in 1988
  3. Jogendra Nath Borbora Memorial Award for securing highest marks in Chemistry Major in B.Sc. Examination, 1984 from J B College, Jorhat
  4. Jayanta Madhab Borthakur Memorial Award for securing highest marks in Chemistry Major in B.Sc. Examination, 1984 from J B College, Jorhat
  5. National Merit Scholarship H.S.L.C. Exam onward

 Honours/Awards/Recognitions that have been received by the Research Scholars

Publications

Publications

 

Research Publications

A) Research papers, published in Peer-reviewed Journals

  1. Bidyot Bikash Gogoi, Md Yeasin, Ranjit Kumar Paul, Diganta Deka, Harisadhan Malakar, Jiban Saikia, Feroze Hasan Rahman, C.S. Maiti, Animesh Sarkar, Jyotirekha G. Handique, Bappaditya Kanrar, A.K. Singh, Tanmoy Karak,* (2024) Pollution indices of selected metals in tea (Camellia sinensis L.) growing soils of the Upper Assam region divulge a non-trifling menace of National Highway, Science of the Total Environment 920, 170737, Elsevier, IF: 9.8
  2. Nishi Gandha Gogoi, Aziza Rahman, Pankaj Dutta, Jiban Saikia, Anupaul Baruah, and Jyotirekha G Handique (2024) Design, synthesis, biological evaluation and in silico studies of curcumin pyrrole conjugates, Chemistry and Biodiversity, 2024, e202301605, https://doi.org/10.1002/cbdv.202301605, Wiley online. IF: 2.9 (Clarivate)
  3. Jitupon Gogoi, Shyamalima Saikia, Pankaj Chetia, Bolin Chetia, Jyotirekha G. Handique* (2024) Design and synthesis of novel coumarin based 1,2,3-triazole derivatives and their antibacterial evaluation, Russian Journal of Bioorganic Chemistry, Springer, Accepted, IF: 1.0
  4. Arup Borgohain, Mridushmita Sarmah, Bidyot Bikash Gogoi, Kaberijyoti Konwar, Jyotirekha G. Handique, Ranjit Kumar Paul, Md. Yeasin, Versha Pandey, Ranu Yadav, Harisadhan Malakar, Jiban Saikia, Diganta Deka, Feroze Hasan Rahman, Saumik Panja, Puja Khare, Tanmoy Karak* (2023) Can tea pruning litter biochar be a friend or foe for tea plants (Camellia sinensis L.) growth and regulators?: Feasible or fumes of fancy, Industrial Crops and Products, 194, 116394, https://doi.org/10.1016/j.indcrop.2023.116394, Elsevier, IF: 6.449
  5. Mridusmita Sarmah, Arup Borgohain, Bidyot Bikash Gogoi, Md Yeasin, Ranjit K. Paul, Harisadhan Malakar, Jyotirekha G. Handique, Jiban Saikia, Diganta Deka, Puja Khare, Tanmoy Karak (2023) Insights into the effects of tea pruning litter biochar on major micronutrients (Cu, Mn, and Zn) pathway from soil to tea plant: An environmental armour, Journal of Hazardous Material, 442, 129970, https://doi.org/10.1016/j.jhazmat.2022.129970, Elsevier, IF: 14.224
  6. Nishi Gandha Gogoi, Pankaj Dutta, Jiban Saikia and Jyotirekha G. Handique (2022), Antioxidant, Antibacterial, and BSA Binding Properties of Curcumin Caffeate Capped Silver Nanoparticles Prepared by Greener Method, ChemistrySelect, 7 (48), e202203989, https://doi.org/10.1002/slct.202203989, Wiley-VCH, IF:2.307
  7. Nishi Gandha Gogoi, Aziza Rahman, Jiban Saikia, Pankaj Dutta, Anupaul Baruah, and Jyotirekha G. Handique (2022), Enhanced biological activity of Curcumin Cinnamates: an experimental and computational analysis, Medicinal Chemistry Research,31, 2195–2208, https://doi.org/10.1007/s00044-022-02977-w, Springer, IF: 2.351
  8. Arup Borgohain, Mridusmita Sarmah, Kaberijyoti Konwar, Rimjim Gogoi, Bidyot Bikash Gogoi, Puja Khare, Ranjit Kumar Paul, Jyotirekha G. Handique, Harisadhan Malakar, Diganta Deka, Jiban Saikia, Tanmoy Karak (2022), Tea pruning litter biochar amendment in soil reduces arsenic, cadmium, and chromium in made tea (Camellia sinensis L.) and tea infusion: A safe drink for tea consumers, Food Chemistry:X, 13, 100255, https://doi.org/10.1016/j.fochx.2022.100255, Elsevier, IF: 6.443
  9. Bidyot Bikash Gogoi, Arup Borgohain, Kaberijyoti Konwar, Jyotirekha G. Handique, Ranjit Kumar Paul, Puja Khare, Harisadhan Malakar, Jiban Saikia, Tanmoy Karak  (2021), National highway induced selected chemical properties of soils across tea bowl of India: scale and assessment, International Journal of Environmental Science and Technology, 19, 12019–12038 https://doi.org/10.1007/s13762-021-03789-y , Springer, IF: 2.86
  10. Hanan Mohamed Fathy Elnagdy, Nishi Gandha Gogoi, Jyotirekha G. Handique, Diganta Sarma (2021), CuO-NPs/TFA: a New Catalytic System to Synthesize a Novel Series of Pyrazole Imines with High Antioxidant Properties, BioNanoScience, https://doi.org/10.1007/s12668-021-00888-5, Springer, IF:3.0
  11. Nishi Gandha Gogoi and Jyotirekha G. Handique* (2019), Novel Protocol for Synthesis of 1,4-Diimino Curcumin Stabilized Silver nanoparticles and Application as Heterogenous
    Recyclable Catalyst and Antibacterial Agent, Journal of Chemical Sciences131, 74. https://doi.org/10.1007/s12039-019-1654-1, Springer, IF: 1.573
  12. Gyanashree Bora, Dipankoj Gogoi, Subhasmita Saikia, Archana Pareek and Jyotirekha G. Handique* (2019), Stannous Chloride Catalyzed Synthesis of Schiff Bases from Hyhydroxybenzaldehydes and Determination of Their Antioxidant Activity by ABTS and DPPH Assay, Journal of Chemical Sciences,131, 68, https://doi.org/10.1007/s12039-019-1645-2, Springer, IF: 1.573
  13. Prodip K. Goswami, Monsum Kashyap, Pranjal P. Das, Prakash J. Saikia & Jyotirekha G. Handique (2019), Poly(Glycidyl Methacrylate-co-Octadecyl Methacrylate) particles by dispersion radical copolymerization, Journal of Dispersion Science and Technology, http://doi.org/10.1080/01932691.2019.1635026, Taylor and Francis, IF: 2.262
  14. Dipankoj Gogoi, Gyanashree Bora, Romesh Borgohain, Jyotirekha G. Handique* (2018), Antioxidant Capacity and GC-MS Analysis of Hexane, Ethylacetate and Methanol Extracts of Ficus bhotanica – A Potential Folklore Medicinal Plant, International Journal of Pharmacognosy and Phytochemical Research,10(5); 201-212
  15. Romesh Borgohain, Jyotirekha G. Handique*, Ankur Kanti Guha, Sanjay Pratihar (2017), A Theoretical Study of Antioxidant Activity of Some Schiff Bases Derived from Biologically Important Phenolic Aldehydes and Phenylenediamines, Journal of Physical Organic Chemistry, 2017;e3757. http://doi.org/10.1002/poc.3757 (Wiley online), IF: 2.391
  16. Gitalee Sharma*, Jyotirekha G. Handique (2016) Synthesis of Series of Low Band Gap Small Organic Molecules and Evaluation of Their Solar Cell Activity, Asian Journal of Chemistry, 28(10), 2223-2227
  17. Romesh Borgohain, Jyotirekha G. Handique*, Ankur Kanti Guha, Sanjay Pratihar (2016), A Theoretical Study on Antioxidant Activity of Ferulic Acid and its Ester Derivatives, Journal of Theoretical and Computational Chemistry, 15(4), 1650028, http://doi.org/10.1142/S0219633616500280, World Scientific, IF: 2.44
  18. Jyotirekha G. Handique*, Dipankoj Gogoi (2016), Antioxidant Activities of the Medicinal Plants Used for Preparation of Fermentation Cakes of “Haanj”, the Rice Based Alcoholic Beverage of Ahom Community People of Assam, India, International Journal of Pharmacognosy and Phytochemical Research; 8(2); 217-22
  19. Alakesh Phukan, Bolin Chetia, Jyotirekha G. Handique and Devid Kardong (2016) Antimicrobial and Antioxidant Activities and RP-HPLC Analysis of Three Edible Medicinal Plants Olax acuminata, Gnetum gnemon and Raphidophora hangkongensis, National Academy Science Letters(published online: 9 Feb, 2016) http://doi.org/10.1007/s40009-016-0422-8, Springer, IF: 0.788
  20. Romesh Borgohain, Ankur Kanti Guha, Sanjay Pratihar and Jyotirekha G. Handique* (2015) Antioxidant Activity of Some Phenolic Aldehydes and Their Diimine Derivatives: A DFT Study, Computational and Theoretical Chemistry, 1060, 17-23, http://doi.org/10.1016/j.comptc.2015.02.014 Elsevier, IF: 2.29
  21. Manas Pratim Boruah*, Jyotirekha. G. Handique (2014) Antioxidant and Antibacterial Properties of some Traditional Medicinal Plants of North East India, International Journal of Advances in Pharmacy Biology and Chemistry, 3(3), 543-549
  22. Manas Pratim Boruah*, Jyotirekha. G. Handique (2014) Antioxidant Behavior of some North East Indian Ethno Medicinal Vegetables and their RP-HPLC Analysis, International Journal of Advances in Pharmacy Biology and Chemistry, 3(2), 426-433
  23. Jyotirekha G. Handique*, Dhrubajyoti Mahanta, Archana Devi and Manas Pratim. Boruah (2013) Synthesis and Electrochemical Behavior of Some Dendritic Polyphenols as Antioxidants, Letters in Organic Chemistry, 10(1), 53-59, Bentham Science, IF: 0.867
  24. Jyotirekha G. Handique*, Manas Pratim Boruah and Dipika Kalita (2012) Antioxidant activities and total phenolic and flavonoid contents in three indigenous medicinal vegetables of North-east India, Natural Product Communications,7(8), 1021-1023, Sage Journals, IF: 0.986
  25. Manas Pratim Boruah, Dhrubajyoti Mahanta and Jyotirekha G. Handique* (2012) Comparative evaluation of antioxidant activities of some fresh and preserved herbal products of North East India by cyclic voltammetry, Indian Journal of Natural Products and Resources,3(1), 40-47, CSIR-NIScPR.
  26. Dipika Kalita, Rahul Kar, Jyotirekha G. Handique (2012) A Theoretical Study on the Antioxidant Property of Gallic Acid and its Derivatives, Journal of Theoretical and Computational Chemistry, 11(2), 391-402, World Scientific, IF: 2.44
  27. Dhrubajyoti Mahanta and Jyotirekha G. Handique* (2011) Simple, Clean and Highly Efficient Synthesis of Polyphenolic Amides Catalysed by Ferric Exchanged Montmorillonite, Letters in Organic Chemistry, 8(9), 618-624, Bentham Science, IF: 0.867
  28. Dhrubajyoti Mahanta and Jyotirekha G. Handique (2011) Highly efficient esterification of phenolic acid over metal exchanged montmorillonite clay, Asian Journal of Science and Technology, 4, 51-58
  29. Jyotirekha G. Handique*, Moushumi Hazarika, Manas Pratim Boruah and Pradip K. Gogoi (2011) Antioxidant activities of some North East Indian ethnomedicinal plants by Cyclic voltammetry, National Academy Science Letters, 34(3&4), 83-91, Springer, IF: 0.788
  30. Jyotireka G. Handique, Jubaraj B. Baruah* (2003) The Oligomer of 1,2,3-trihydroxybenzene with benzaldehyde, Reactive and Functional Polymers, 55, 319-332, Elsevier, IF: 3.975
  31. Jyotirekha G. Handique, Jubaraj B. Baruah* (2002) Polyphenolic Compounds: An Overview (Review), Reactive and Functional Polymers, 52, 163-188 (rated as one of the TOP 25 HOTTEST ARTICLES in several periods), Elsevier, IF: 3.975
  32. Jyotirekha G. Handique, Jubaraj B. Baruah* (2002) Conversion of 1,4-naphthalenediol to 1,4-naphthoquinone by 1,4-benzoquinone, Journal of Molecular Catalysis A: Chemical 184, 85-93, Elsevier, IF: 5.062
  33. Jyotirekha G. Handique, L. Baruah, Rupam J. Sharma and Jubaraj B. Baruah* (2002) Participation of Self-generated polyaniline support in copper(II) catalysed oxidative reaction of phenyl aldimines, Journal of Molecular Catalysis A: Chemical, 188, 63-69, Elsevier, IF: 5.062
  34. Jyotirekha G. Handique, Jubaraj B. Baruah* (2001) The oligomer of 1,6-naphthalenediol as a support in oxidative reactions of cis-bis glycinato copper(II) and hydrogen peroxide, Journal of Molecular Catalysis A: Chemical, 172, 19-23, Elsevier, IF: 5.062
  35. Jyotirekha G. Handique, Arup Purkayastha, Jubaraj B. Baruah* (2001) Reduction of α,β-unsaturated carbonyl compounds by Ni2+/BH4-, Journal of Organometallic Chemistry, 620, 90-93, Elsevier, IF: 2.369
  36. Jyotirekha G. Handique, Jubaraj B. Baruah* (2001) Oxidative oligomerisation of 2-naphthol by cis-bis glycinato copper(II) Journal of Molecular Catalysis A: Chemical, 166, 225-231, 2001, Elsevier, IF: 5.062
  37. Amrit Puzari, Jyotirekha G. Handique, Arup Purkayastha, A. Srinivasan and Jubaraj B. Baruah* (1999) Thermoelectric switch from anilinic compounds, Indian Journal of Chemistry, 38A, 521-524, CSIR-NIScPR, IF: 0.491
  38. Jyotirekha Gogoi* and Pabitra K. Sarma (1997) Chemical investigation of Vangueria spinosa II, Indian Drugs, 34(109), 610-611

B) Research papers, published in Conference Proceedings

  1. Jyotirekha G. Handique, Dipika Kalita and Pratap J. Handique (2017) A correlation study of antioxidant activity, total phenolic content and total flavonoid content of fruits of Solanum species of North East India, 2nd International Conference on Herbal and Traditional Medicine (HTM-2017), 25-27 January, Hosted by Khon Kaen Univ., Bangkok, Thailand
  2. Jyotirekha G. Handique and Jubaraj B. Baruah (2001) Thermochemical properties of naphthalenediol oligomers, The 6th Asian Thermophysical Society Conference, 8-11 October, Gauhati Univ.
  3. Jyotirekha Gogoi and Pabitra K. Sarma (1993) Chemical investigation of Meyna laxiflora Robyns. syn Vangueria spinosa Roxb. III Proc. Natl. Seminar on Chemical Reactivity: Recent Trends, 23-25 Nov, Gauhati Univ
  4. Jyotirekha Gogoi* and Pabitra K. Sarma (1992) Chemical investigation of Vangueria spinosa Roxb. I, Proc. Natl. Seminar on Modern Trends in Anal. Tech.: Applications in Chemistry, 4-6 May, Gauhati University

*Gogoi was my maiden title

C) Book Chapters

  1. Upasana Bhuya and Jyotirekha G. Handique, Plant polyphenols as potent antioxidants: Highlighting the mechanism of antioxidant activity and synthesis/development of some polyphenol conjugates, Chapter 6, p. 243-266, In Studies in Natural Products Chemistry: Bioactive Natural Products, Vol. 75, Atta-ur-Rahman (Ed.), Elsevier, Amsterdam, Netherlands, ISBN: 978-0-323-91250-1, ISSN: 1572-5995, 2022
  2. Nishi Gandha Gogoi and Jyotirekha G. Handique, Biosurfactants being a potential alternative to the chemical surfactants available in the market, Chapter 9, p. 153-180 In Advanced Research in Chemistry, Vol. 4, D. T. Sakhare (Ed.), AkiNik Publications, Delhi, ISBN: 978-93-5570-297-5, Book DOI: https://doi.org/10.22271/ed.book.1800, 2022
  3. Gyanashree Bora and Jyotirekha G. Handique, Oxidation of Lignin from Wood Dust to Vanillin Using Ionic Liquid Medium and Study of Its Antioxidant Activity, Chapter 15, p. 277-296, In Re-Use and Recycling of Materials: Solid Waste Management and Water Treatment, Editors Jibin K. P., Nandakumar Kalarikkal, Sabu Thomas and Ange Nzihou, River Publishers, Denmark and The Netherlands, ISBN: 978-87-7022-058-3 (Hardback), 978-87-7022-057-6 (Ebook), 2019
  4. Jyotirekha G. Handique, Polyphenols as Antioxidants, Chapter 4, In “Chemistry of Phenolic Compounds: State of the Art”, J.B. Baruah (Ed), Nova Science Publishers, 2011 (ISBN 978-1-61761-335-7), New York, p 31-48.

D) Research papers/posters, presented in Seminars/Conferences, that received Awards

  1. Archana Devi and Jyotirekha G. Handique* (2011) International Conference on Emerging Areas of Chemistry, 12-14 January, 2011, at Tripura University in association with IACS, Kolkata: Best Poster Award

E)Seminar/Conference/Workshop/Training Programme, attended/ Paper presented

  1. 2nd International Conference on Herbal and Traditional Medicine (HTM-2017), 25-27 January, 2017, Hosted by Khon Kaen Univ., at Asia Hotel, Bangkok, Thailand
  2. International Training Programme on Leadership and Career Development for Women Scientists/Technologists, organised by DST & IUSSTF& COACh-University of Oregon, USA at INSA, New Delhi, 1-5 Sept. 2014
  3. International Conference on Harnessing the sub-Himalayan Plant Diversity for Human Welfare, Dibrugarh University, 11-13 March 2015
  4. National Seminar on Recent Trends in Fundamental and Applied Chemical Sciences, Dept. of Chemistry, Dibrugarh University, 19-21 November, 2014
  5. 18th International Conference (Post ISCBC- 2012) Perspective and Challenges in Chemical and Biological Sciences: Innovation Cross Roads, IASST, Guwahati, 28-30 Jan, 2012 (Oral presentation)
  6. International Conference on Emerging Areas of Chemistry, held at the Department of Chemistry, Tripura University in association with Indian Association for Cultivation of Science, Kolkata, 12–14 Jan, 2011, Received the Best Poster Presentation award in the Conference.
  7. National Seminar on Recent Advances in Synthesis and Catalysis, Dept of Chemistry, Dibrugarh University,10-12 Feb, 2011
  8. National Seminar on Recent Advances in Chemical Sciences, Dept. of Chemistry, Dibrugarh University, 27-28 March, 2009.
  9. National Seminar on Biodiversity Conservation and Future Concern, Dept. of Biotechnology, GU, June 17-18, 2005
  10. DST sponsored National Workshop on Sensors for Agricultural and Industrial Application, Dept. of Physics, Dibrugarh University, 20–Oct 1, 2004
  11. National Seminar on medicinal plants in North Eastern Region, Govt. Ayurvedic College, Guwahati, 7 – 10 Oct, 2004.
  12. JNCASR sponsored Frontier Lectures in Chemistry, IIT-Guwahati, Aug 29-30, 2003
  13. The 6thAsian Thermophysical Society Conference, Gauhati University, 8-11 Oct., 2001
  14. Workshop cum Training Programme on Utilization, Plantation and Conservation of Medicinal Plants, Gauhati University, 16-17 May, 1997
  15. Assam Science Society Annual Technical Session, Dibrugarh University, 28 Dec, 1993
  16. National Seminar on Chemical Reactivity: Recent Trends, Gauhati University, 23-25 Nov, 1993
  17. National Seminar on Modern Trends in Anal. Tech.: Applications in Chemistry, Gauhati University, 4-6 May, 1992.

Plenary Lecture/Invited Talk delivered

  1. Invited Talk on “Effective online Teaching Strategies in Higher Education” in a Faculty Development Programme (FIP-04) Aug 2-31, 2021, organized by UGC-HRDC, Gauhati University, on 17th August, 2021
  2. Invited Talk on “Use of Digital Platforms for Education in India during Covid-19 situation” in a National Webinar organised by Biswanath College on 13th July, 2020
  3. Invited Talk on “SWAYAM: A New Dimension in Teaching and Learning” in the Refresher Course in Environmental Studies (ID), 24 Sep-14 Oct, 2018, organized by UGC-HRDC, Gauhati University, on 3rd October, 2018 
  4. Teachers’ Day Talk, organised by Department of Chemistry Dibrugarh University, 5thAugust, 2018 on the topic “SWAYAM: A New Dimension in Teaching and Learning”
  5. One-Day Orientation Workshop on SWAYAM and MOOCs, organised by SWAYAM Cell, IQAC, DHSK College and Assam College Teachers Association (ACTA), DHSK College unit, DHSK College, Dibrugarh, 30th August, 2018 (Invited Talk on “MOOCs for SWAYAM: Role of EMRCs”)
  6. One-Day State Level Workshop on SWAYAM, organised by Kakojan College, Kakojan, 25th August, 2018 (Invited Talk on “MOOCs for SWAYAM: Role of EMRCs”)
  7. One-Day Workshop on SWAYAM, organized by Department of Commerce in collaboration with Internal Quality Assurance Cell (IQAC), Margherita College, Margherita, 7th June 2018 (Invited Talk on “SWAYAM: The Digital Platform for Education: Anytime-Anywhere –Anyone”)
  8. National Seminar on Indigenous Health Practices with special reference to the Tribes of North East India, Department of Anthropology, DU, 22-23 March, 2013 (Plenary Lecture) (Topic: Antihepatotoxic Activities of Some Medicinal Plants of North-East India)
  9. Invited Lecture Programme by Women Studies Cell, MDKG College, Dibrugarh, 9thJune, 2012 (Topic: Women in Science and Technology-Perspectives and Challenges)
  10. National Workshop on Gender Budgeting and Women Empowerment, Sponsored by the Ministry of Women and Child Development, Govt. of India at Centre for Women Studies, DU, 14-16 March, 2012(Topic: Women in Science and Technology and Gender Budgeting)
  11. National Workshop on Drug precursors from Natural Resources under SAP-DRS-Iprogramme, Department of Chemistry, D.U., 29th March, 2011 (Topic: Quest for Antioxidants: In Nature and in Synthetic Ways)

Other Publications of Professional Interest

Contribution to compiled volume of literary work

  1. Contributed write-ups on science topics for "Bishwakosh" (Encyclopaedia), published by Asam Sahitya Sabha
  2. Contributed a chapter on History of Chemistry in a book titled “Bigyanor Itihas” (“History of Science”), Publication division, Dibrugarh University, page 279-398, 2023

Other interests

  1. Creative writing (Short stories, thought provoking articles, musing on personal experiences).
  2. Academic administration activities
  3. Women empowerment programmes

(1) Creative writings

  1. Prohoree (A short story) published in JBianor Nirbachito Galpa (Selected Short Stories from JBian – The College Magazine of J. B. College, Jorhat), published by Publication Cell of Jagannath Barooah College (Autonomous) 2022, p. 299-303
  2. Maar Taantshal (Mom’s Loom), Amar Asom (An Assamese Daily), October 6 and 8, 2020
  3. Joy of being known by name, Smriti Saurobh (Souvenir of First Alumni Meet, Dept. of Chemistry, DU), 28 Dec, 2017, p. 17-22
  4. Gharee (The Clock), Nahor Deshor Galpa (A collection of short stories, published by DU Yuva Chatra Mancha), April, 2014, p. 32-37 [Earlier published in Prantik, The Assamese Fortnightly Magazine, 2008, 27(7), p. 52-54 and also in Amar Asom, (Short Story)
  5. Janapriyatar sadhana banam utkristatar sadhana (Quest for popularity vs. quest for Excellence), DUPGSU Magazine, 2010, p. 44-46 (Article)
  6. Shikshakatar Glamour: Medhai jar mul bheti (Glamour of teaching: where talent is the basis), DUPGSU Magazine, 2008, p. 17-19 (Article)
  7. Morijanjit ejobora (A plunge in the dead river ‘Morijanji’), Amar Asom, The Assamese Daily, 2010, June 13-14 (Story)
  8. Raamdhanu (The Rainbow), Amar Asom, The Assamese Daily, 2008, Aug 31, p. 6-7(Story)
  9. Madhurena samapayet (Ending with a Sweetnote), Amar Asom, The Assamese Daily, 2008, Feb. 9, p. 4, Story
  10. Chaka (The Wheel), Amar Asom, The Assamese Daily, 2007, Dec. 15, p. 4, (Story)
  11. Maar chasma (Mom’s spectacles), Saatsori, The Assamese Fortnightly Magazine, 2006, July 1-15, p. 50, (Story)
  12. Katha kuthambolom (The Saga of the Kuthambolom: The indigenous amphitheatre of Kerala), Saatsori, 2006, May 1-15, p. 60-62, Translated from ‘The God of Small Things’
  13. Byoktigata aru anusthanik (Personal and Institutional), Saatsori, The Assamese Fortnightly Magazine, 2005, Aug 15-31, p. 20-21, (Article)
  14. Methoni baganot esandhya (An evening at the Methoni Tea Estate), Amar Asom, The Assamese Daily, 2004, Aug 7, p. 4, (Story)
  15. Chorailoi sholagor suhuri (Thanking the birds), Purbachal, (The Sunday supplement of Amar Asom, The Assamese Daily), 2002, Oct. 13, p. 18&14, (Story)
  16. Ipsita (Oicchik) santanhinatar dharana (Principle of Optional Childlessness), Amar Asom, The Assamese Daily, 2002, Jan 3, p. 3, (Article)
  17. To have or not to have, North East Times (High Point), 1995, Sept 24, (Article)

(2) Popular Science Publications

  1. Vigyaane ki bichare? Eeshwarok ne Satyok? (What does science search for? God or Truth?), Niyomiya Barta, The Assamese Daily, 2018, March 15
  2. Sheri: A Call for Occupational Safety, ChemiDUscope, (A science magazine, published by Department of Chemistry, DU) Vol 1, September 5, 2016, p. 13-17
  3. Antarjatik rasayanbarsha, pratyahban aru sambhabana (International Year of Chemistry, Challenges and Prospects), Dainik Janambhumi, The Assamese Daily, 2011, Mar 23, p. 4
  4. Kharga (The Rhinohorn), Amar Asom, The Assamese Daily, 2008, Feb 26, p. 4
  5. Premor bignan aru bibartanbad (The Science and Evolution of ‘Love’), Saatsori, The Assamese Fortnightly Magazine, 2006, June 1-15, p. 24-27
  6. Wise management of waste, My Green Earth, 2002, Feb-Mar, 2(3), 4-6
  7. Being rationally herbal, North East Times (High Point), 2000, Feb 6, p. 3
  8. Kotkora gach (Meyna laxiflora tree), Prantik, The Assamese Fortnightly Magazine, 2006, March 16, p. 35-36
  9. Andhabiswas banam mukta manasikata, (Superstition vs. open mindedness), Amar Asom, The Assamese Daily, 2004, Aug 30, p. 4
  10. Prasadhan samagrir rasayan (Chemistry of cosmetics), Payobhara, 2002, Nov, p. 10-12
  11. Mor mother’s day card: Kola mekuree nedekhile (My mother’s day card : When no ‘black cat’ is seen!), Amar Asom, The Assamese Daily, 2002, May 12, p. 6
  12. Aksharam paramam brahmam (Literacy is the absoluteness), Amar Asom, 2002, Mar 11, p. 4
  13. Asustha namrata (Unhealthy politeness), Amar Asom, The Assamese Daily, 2002, Feb 14, p. 4
  14. Bonoushadhi, Biswakosh aru Asomiya manuhor udyam (1) and (2) (Herbal-drug, Encyclopedia and the Assamese spirit), Amar Asom, The Assamese Daily, 2001, Nov 27-28, p. 3
  15. Daini-hatya, Biswakarma puja, Aranyam sewa ityadi (Witch-killing, Biswakarma Puja, ‘Aranyam Sewa’ etc.), Amar Asom, The Assamese Daily, 2001, Oct 25, p. 3
  16. Dainik byabahrita samagrit rasayanik padartha (Chemicals in daily used products), Payobhara, 2001, June, p. 28-30
  17. Janapriya starat bignan shikshar prachar (Extension of science education at popular level), Angik, 2001, April, p. 17-20
  18. Bardhakya (Ageing), Payobhara, 2001, Feb, p. 21-22
  19. Keshcharcchar samagri: Rasayan aru byabasay (Hair-care products: Chemistry and trade), Payobhara, 2000, Nov, p. 20-22
  20. Bharatat aborjanar pora shakti utpadan (Generation of energy from waste in India), Payobhara, 2000, June, p. 12-15
  21. Peloniya dravyar suphaladayak byabastha (Fruitful management of waste), Payobhara, 1999, Sept, p. 36-38
  22. Paribesh sangrakshanat mahilar bhumika (Role of women in protection of environment), Payobhara, 1999, July, p. 21-23
  23. Paribeshar sampadsamuh (The wealth of the environment), Payobhara, 1999, Mar, p. 13-14
  24. Cancerkarak rasayanik dravya (Carcinogenic chemicals), Payobhara, 1998, June, p. 36-38
  25. Kuhumkanta, ebidh oushadhi udbhid (Kuhumkata, a medicinal plant), Payobhara, 1996, June, p. 25
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