Dr. Rocktotpal Konwarh

Scientist (Nanomedicine)


Professional Positions/Experience

  • Assistant Professor (and Undergraduate Course Coordinator)

    Department of Biotechnology, College of Biological and Chemical Engineering,

    Addis Ababa Science and Technology University, Addis Ababa, Ethiopia

    Period: April 16, 2018- Dec 2020

  • Guest Faculty- (Nanobiotechnology)

    Faculty of Materials Science and Engineering, Jimma Institute of Technology,

    Jimma University, Jimma, Ethiopia

    Period: Mar 2019-April 2019

  • Guest Faculty- Immunology

    Centre for Biotechnology and Bioinformatics, Dibrugarh University, Assam, India

    Period: Mar 2017-May 2017

  • Post Doctorate in Biomaterial Engineering and Regenerative Medicine

    DST-UKIERI project co-investigator: Electrospun silk-bioglass scaffold for interfacial tissue engineering,

    Mentor: Dr. Biman B. Mandal, Department of Biosciences & Bioengineering, IIT Guwahati, India

    Period: Sep 2014- Oct 2016

    DST-UKIERI Visiting post-doctoral researcher

    Mentor: Prof. J. C. Knowles, Eastman Dental College, University College London, United Kingdom (2015)

  • DBT Research Associate- Bioinformatics

    Department of Molecular Biology and Biotechnology, Tezpur University

    Mentor: Dr. Suvendra Ray, Head, Department of MBBT, Tezpur University, India

    Period: 2013-2014

Academic Credentials

  • Doctor of Philosophy (Ph.D.) in Chemical Sciences (Spcl. Nanobiotechnology) (2013)

    Thesis title: ‘Polymer Assisted Nanomaterials Immobilized Biomolecules and Their Potential Applications’

    Supervisor: Prof. Niranjan Karak, Department of Chemical Sciences, Tezpur University, India

  • Post-graduation: M. Sc. - Molecular Biology and Biotechnology (2008)

    1st class 1st (Gold Medalist), Tezpur University, Sonitpur, Assam, India

National Level Examination

  • Qualified CSIR-UGC NET JRF (Life Science) held on 23 December, 2007.
  • Qualified DBT-JRF 2008 (Merit List A, Sl. No. 21), held on 20 April 2008.
  • Qualified GATE 2007 held on 11 February, 2007- Life Sciences (XL).

Scholarship / Fellowship

  • Institutional Post Doctorate Research Fellowship, IIT Guwahati- (September 2014-October 2016)
  • Department of Biotechnology, Govt. of India-Research Associate fellowship- November 2013-May 2014
  • Canadian Commonwealth Scholarship (Canadian Bureau for International Education, DFAIT) September 2011-February 2012 (Visiting Researcher to University of Guelph, Canada)
  • Department of Biotechnology, Govt. of India-SRF-November 2010- May 2013
  • Department of Biotechnology, Govt. of India JRF-November 2008- November 2010
  • Department of Biotechnology, Govt. of India, M.Sc. studentship 2006-2008
  • Indian Academy of Sciences, Bangalore- Indian National Science Academy, New Delhi-National Science Academy, Allahabad summer research fellowship, June-August 2007

Trainings and Projects/Research Experience

Prior to Ph.D

  • IASc-INSA-NASI 2 months summer research fellowship programme, 2007
    Project title: ‘Evaluation of the neuroprotective and anti-apoptotic effect of Rosmarinic acid in Japanese encephalitis in an experimental murine model’
    Supervisor: Dr. Anirban Basu, National Brain Research Centre, India
    The challenge to generate a safe, cost-effective and efficacious Japanese encephalitis (JE) vaccine is constantly intensifying. In this context, the potential of Rosmarinic acid (Ros A/RA) as a therapeutic agent against JE insult was evaluated. The treatment with RA, at least to a considerable extent, if not fully, was capable of counterchecking the JEV induced neuronal cell death.
  • M.Sc. project (6 months), 2008
    Project title:Statistical optimization of the media components using response surface methodology for alkaline keratinase production in solid state fermentation by a feather degrading Bacillus subtilis strain and immobilization of the crude keratinase onto iron-oxide nanoparticles’
    Supervisor: Prof. A.K. Mukherjee, Tezpur University, India
    Response surface methodology (RSM) was applied for optimization of the media composition for β-keratinase production by feather degrading Bacillus subtilis RM-01 in solid-state fermentation using chicken-feather as substrate. Preliminary investigation was done to evaluate the coupling of the crude enzyme onto iron oxide nanoparticles.

Ph.D. work (January 2009- May 2013)

Thesis title: ‘Polymer assisted nanomaterials immobilized biomolecules and their potential applications’

Supervisor: Prof. Niranjan Karak, Tezpur University, India

I had worked on the preparation (based on the use of various bioresources and green chemistry tool of sonication), statistical optimization and bio-physico-chemical characterization of various polymer supported nanomaterials (e.g., magnetically responsive and antimicrobial poly(ethylene glycol) assisted iron oxide - silver hybrid nanoparticles) and polymeric nanomaterials (e.g., polyaniline nanofibers) as immobilization platforms for biocatalysts (e.g., keratinase, porcine pancreatic lipase, amyloglucosidase) and phytocompounds (e.g., curcumin and lycopene) for various biomedical and industrial (e.g., leather, food etc.) applications along with preliminary investigation on their action at the bio-interface in the milieu of shape-size-surface chemistry accord. I also worked on the electrospinning of cellulose acetate nanofibers for prospective biomedical applications during my Ph.D. course under Canadian Commonwealth Scholarship (Supervisor: Prof. M. Misra and Prof. A. K. Mohanty, Bioproducts Discovery and Development Centre, Dept. of Plant Agriculture, University of Guelph, Ontario, Canada).

Post Ph.D.

  • Research Associate (November 2013- May 2014)

    Supervisor: Dr. S. K. Ray, Tezpur University, India

    During this period, I tried to understand the codon usage bias in organisms living in extreme ecological niches.

  • Institutional Post Doctorate Research Fellow (September 2014- October 2016)

    Mentor: Dr. B. B. Mandal, Indian Institute of Technology Guwahati, India

    I was involved in exploring the various silk varieties, endemic to North East India for various biomedical applications (primarily focused on electrospun nanofibrous hybrid mats for osteochondral tissue engineering). The other projects involved the investigation of the intrinsic fluorescence of silk based biomaterials as well as application of silk nanocomposites for environmental hazard remediation and water purification. Preparation and application of carbonaceous nanomaterial for drug delivery application was another of my endeavors. I also visited UCL, England as DST-UKIERI project co-investigator during this period to the lab, headed by Prof. J.C. Knowles.

Current Research Focus: Biocatalysts for industrial applications; regenerative medicine and tissue engineering, biopolymers for phytoprotection; nanobiomaterials for medical and environmental applications, nano-bio interfacial interactions; green nanotechnology; biomolecule immobilization

List Of Publications

(As on May 29, 2020, Citations: 1109, h-index: 16, i10-index: 20, courtesy: Google Scholar)

  • Mehrotra, S., Chouhan, D., Konwarh, R., Kumar, M., Kumar J.P., & Mandal, B,B, Comprehensive review on silk at nanoscale for regenerative medicine and allied applications ACS Biomater. Sci. Eng. 5, 2058--2074, 2019 (IF: 4.511)
  • Konwarh, R. Can the venerated silk be the next-generation nanobiomaterial for biomedical-device designing, regenerative medicine and drug delivery? Prospects and hitches. Bio-des. Manuf. 2, 278--286, 2019
  • Konwarh, R. Oliver Howe Lowry - the ‘incorrigible addict’ of micro-analytical methods. Curr. Sci. 117, 2067--2068, 2019 (IF: 0.756)
  • Konwarh, R. Exploring North East India's non-mulberry silk based bioinks for three dimensional bioprinting. Curr Sci. 118, 345-347, 2020 (IF: 0.756)
  • Konwarh R. Silk based nano fibrous biomaterials for tissue engineering and regenerative medicine (TERM): transcending new frontiers. Mat. Sci. Res. India 16 (1). 2019 (Editorial article)
  • Kumar, J.P., Konwarh, R., Kumar, M., Gangrade, A., & Mandal, B.B. Potential nanomedicine applications of multifunctional carbon nanoparticles developed using green technology. ACS Sustainable Chem. Eng., 6, 1235—1245, 2018 (IF: 6.97)
  • Christakiran, M. J, Reardon, P.J.T., Konwarh, R, Knowles, J.C., & Mandal, B.B. Mimicking hierarchical complexity of the osteochondral interface using electrospun silk-bioactive glass composites. ACS Appl. Mater. Interfaces 9, 8000--8013, 2017 (IF: 8.456)
  • Konwarh, R., Bhunia B.K., & Mandal B.B. Opportunities and challenges in exploring Indian nonmulberry silk for biomedical applications. Proc. Indian Natn. Sci. Acad. 83, 85--101, 2017
  • Konwarh, R., Gupta P., & Mandal B.B. Silk-microfluidics for advanced biotechnological applications: A progressive review. Biotechnol. Adv. 34, 845--858, 2016 (IF: 12.831)
  • Baruah, V., Satapathy S.S., Powdel, B. R., Konwarh, R., Buragohain, A.K., & Ray S.K. Comparative analysis of codon usage bias in crenarchaea and euryarchaea genome reveals differential preference of synonymous codons to encode highly expressed ribosomal and RNA polymerase proteins. J. Genetics. 95, 1--13, 2016. (IF: 0.825)
  • Pramanik, S., Konwarh, R., Barua N., Buragohain, A.K., & Karak, N. Bio-based hyperbranched poly(ester amide)/MWCNT nanocomposites: multimodalities at biointerface. Biomater. Sci., 2, 192--202, 2014 (IF: 5.251)
  • Konwarh, R., Shail, M., Medhi, T., Mandal, M., & Karak, N. Sonication assisted assemblage of exotic polymer supported nanostructured bio-hybrid system and prospective application. Ultrason. Sonochem, 21, 634--642, 2014 (IF: 7.279)
  • Konwarh, R., Karak, N., & Misra, M. Electrospun cellulose acetate nanofibers: the present status and gamut of biotechnological applications. Biotechnol. Adv. 31, 421--437, 2013 (IF: 12.831)
  • Konwarh, R., Misra, M., Mohanty, A.K., & Karak, N. Diameter-tuning of electrospun cellulose acetate fibers: a Box-Behnken design (BBD) study. Carbohyd. Polym. 92, 1100--1106, 2013. (IF: 6.044)
  • Pramanik, S., Konwarh, R., Deka, R.C., Aidew, L., Barua, N., Buragohain, A.K., Mohanta, D., & Karak, N. Microwave-assisted poly(glycidyl methacrylate)-functionalized multiwall carbon nanotubes with a 'tendrillar' nanofibrous polyaniline wrapping and their interaction at bio-interface. Carbon 55, 34-43, 2013 (IF: 7.466)
  • Barua, S., Konwarh, R., Bhattacharya, S.S., Das, P., Devi, K.S.P., Maiti, T.K., Mandal, M., & Karak, N. Non-hazardous anticancerous and antibacterial colloidal 'green' silver nanoparticles. Colloid Surf. B 105, 37--42, 2013 (IF: 3.973)
  • Pramanik, S., Konwarh, R., Sagar, K., Konwar, B.K., & Karak, N. Bio-degradable vegetable oil based hyperbranched poly(ester amide) as an advanced surface coating material. Prog. Org. Coat. 76, 689--697, 2013 (IF:3.420)
  • Saikia, J.P., Konwarh, R., Konwar, B.K., & Karak, N. Isolation and immobilization of aroid polyphenol on magnetic nanoparticles: enhancement of potency on surface immobilization. Colloid Surf. B 102, 450--456, 2013. (IF: 3.973)
  • Singh, S.P., Konwarh, R., Konwar, B.K., & Karak, N. Molecular docking studies on analogues of quercetin with D-alanine–D-alanine ligase of Helicobacter pylori. Med. Chem. Res. 22, 2139--2150, 2013 (IF: 1.720)
  • Barua, S., Konwarh, R., Mandal, M., Gopalakrishnan, R., Kumar, D., & Karak, N. Biomimetically prepared antibacterial, free radical scavenging poly(ethylene glycol) supported silver nanoparticles as Aedes albopictus larvicidal agent. Adv. Sci. Eng. Med. 5, 201--208, 2013. (IF: Not Assigned)
  • Konwarh, R., Pramanik, S., Devi, K. S. P., Saikia, N., Boruah, R., Maiti, T. K., Deka, R. C., & Karak N. Lycopene coupled ‘trifoliate’ polyaniline nanofibers as multi-functional biomaterial. J. Mat. Chem. 22, 15062--15070, 2012. (IF: 6.626)
  • Konwarh, R., Pramanik, S., Kalita, D., Mahanta, C.L., & Karak, N. Ultrasonication – A complementary ‘green chemistry’ tool to biocatalysis: A laboratory-scale study of lycopene extraction. Ultrason. Sonochem. 19, 292--299, 2012. (IF: 7.279)
  • Konwarh, R., Gogoi, B., Philip, R., Laskar, M. A., & Karak, N. Biomimetic preparation of polymer- supported free radical scavenging, cytocompatible and antimicrobial "green" silver nanoparticles using aqueous extract of Citrus sinensis peel. Colloid Surf. B 84, 338--345, 2011. (IF: 3.973)
  • Konwarh, R., Karak, N., Sawian, C.E., Baruah, S., & Mandal, M. Effect of sonication and aging on the templating attribute of starch for “green” silver nanoparticles and their interactions at bio-interface. Carbohyd. Polym. 83, 1245--1252, 2011. (IF: 6.044)
  • Konwarh, R., Saikia, J.P., Karak, N., & Konwar, B K. ‘Poly(ethylene glycol)-magnetic nanoparticles-curcumin’ trio: directed morphogenesis and synergistic free radical scavenging. Colloid Surf. B 81, 578--586, 2010. (IF: 3.973)
  • Konwarh, R., Kalita, D., Mahanta, C.L., Mandal, M., & Karak, N. Magnetically recyclable, antimicrobial, and catalytically enhanced polymer-assisted “green” nanosystem-immobilized Aspergillus niger amyloglucosidase. Appl. Microbiol. Biotechnol. 87, 1983--1992, 2010. (IF: 3.670)
  • Karak, N., Konwarh, R., & Voit, B. Catalytically active vegetable-oil based thermoplastic hyperbranched polyurethane/silver nanocomposite. Macromol. Mater. Eng 295, 159--169, 2010. (IF: 2.69)
  • Konwarh, R., Karak, N., Rai, S.K., & Mukherjee, A.K. Polymer-assisted iron oxide magnetic nanoparticle immobilized keratinase. Nanotechnol. 20, 225107, 2009. (IF: 3.399)
  • Rai, S.K., Konwarh, R., Mukherjee, A. K. Purification, characterization and biotechnological application of an alkaline β-keratinase produced by Bacillus subtilis RM-01 in solid-state fermentation using chicken-feather as substrate. Biochem. Eng. J. 45, 218--225, 2009. (IF: 3.371)

Book Chapters

  • Konwarh, R.* & Dhandayuthapani, B. “Sustainable bio-resource, silk at the nanoscale for biomedical applications.” Ed. Niranjan Karak. Dynamics of Advanced Sustainable Nanomaterials and their Related Nanocomposites at the Bio-Nano Interface. Elsevier, pp: 125-145, 2019 (*Corresponding author)
  • Barua, S., Baruah, S., & Konwarh, R.* “Ion-exchange nanocomposites: avant-garde materials for electrodialysis.” Ed. Kaushik Pal. Hybrid Nanocomposite: Fundamental, Synthesis and Applications. Pan Stanford Publishing, pp:215-246, 2019 (*Corresponding author)
  • Bacheti, R.K., Konwarh, R., Gupta, V., Husen, A., & Joshi, A. "Green synthesis of iron oxide nanoparticles: Cutting edge technology and multifaceted applications." Ed. Azamal Husen and Muhammad Iqbal. Nanomaterials and Plant Potential. Springer International Publishing, pp:239-259, 2019
  • Konwarh, R.*, & Sharma, P.L. “Nanosensor platforms for surveillance of plant pathogens and phytometabolites/analytes vis-à-vis plant health status.” Eds. Azamel Husen and Mohammad Jawaid. Nanomaterials for Agriculture and Forestry Applications. Elsevier, pp: 357-385, 2020 (*Corresponding author)
  • Konwarh R.*, Gollavelli, G., & Palanisamy, S.B. Designing of novel type nanosensor for environmental aspects.” Eds. Kaushik Pal and Fernando Gomes de Souza. Nanofabrication and Applications of Smart Nanosensors. Elsevier (2020, In Press) (*Corresponding author)
  • Konwarh, R. & Husen, A. “Alginate based nanocomposites for gene delivery.” Eds. Showkat A, Zoheb and Mohammad Jawaid. Polysaccharide based nanocomposites for gene delivery and tissue engineering. Elsevier (2020, In Press)

List Of COnferences and Seminars

  • Konwarh, R., From silk at the nanoscale for osteochondral regeneration to bio-based multifunctional carbon nanoparticle for anticancer drug delivery, in International Conference On New Frontiers In Engineering, Sciences, Law, Management, Humanities and Social Sciences 2019, Gauhati University, Assam, India [KEYNOTE SPEAKER]
  • Konwarh, R. Silk, a sustainable biomaterial: Transcending new frontiers in regenerative medicine, in 4th Annual Research Conference, AASTU-Research and Innovations for Sustainable Economy (2018), Addis Ababa Science and Technology University, Ethiopia [POSTER] Curriculum vitae - Dr. Rocktotpal Konwarh
  • Konwarh, R. Laying a new ‘silk-route’: from the farms to the operation theatre, in National Seminar on Problems, Prospects and Challenges for the Development of Northeast India (2017), St. Joseph’s College, Jakhama, Nagaland, India [ORAL]
  • Konwarh, R., Das, A., Sharma, M., Das, A., Gurung, P., Karak, N., & Buragohain, A.K. Nanoclay: can it be an alternative silicon source for in vitro culture of diatoms, in National Conference on Nanomaterials Science, Technology and Applications (NAMASTA- 2017), Dibrugarh University, Assam, India [POSTER]
  • Konwarh, R., & Deori, U. Assisting the specially abled persons with the ‘silky soldier’, ‘muga’ against degenerative conditions, on National Science Day (2017), Dibrugarh University, Assam, India. [POSTER]
  • Konwarh, R., & Mandal, B.B. Magnetic-field responsive and free radical scavenging electrospun silk fibroin mats, in Second Symposium on Advances in Sustainable Polymers (2015), IIT Guwahati, Assam, India. [POSTER]
  • Kumar, J.P., Konwarh, R., & Mandal, B.B. Fluorescent biopolymers- fibroin and sericin, extracted from mulberry and non-mulberry based silk, endemic to north east India, in National Conference on Advances in Polymer Science and Technology (2015) , Institute of Advanced Study in Science and Technology (IASST), Guwahati, Assam, India. [POSTER]
  • Kumar, M., Kumar, J.P., Gupta, P., Mehrotra, S., Singh, G., Konwarh, R., & Mandal, B.B. Silk based bioengineering, in Research Conclave (2015), IIT Guwahati, Assam, India. [POSTER]
  • Konwarh, R., & Karak, N. Biohybrids of polymeric nanomaterials/ nanocomposites: from clean hair-shaving technology to multifunctional biomaterial, in National Conference on Advanced Materials and Applications (2013), National Institute of Technology, Tiruchirapalli, Tamil Nadu, India. [ORAL]
  • Konwarh, R., & Karak, N. Polymer supported nanomaterials as immobilization platform for microbial biocatalysts: prospective application from leather industry to detergent industry, in National Seminar cum Workshop on Recent Advances in Microbial Biotechnology and Molecular Evolution (2013), Tezpur University, Assam, India [ORAL]
  • Konwarh, R., Mohanty, A.K., Misra, M., & Karak, N. Electrospun cellulose acetate mats for automotive applications, in Ontario Biocar Initiative, 8th Biannual Research Meeting (2011), University of Windsor, Windsor, Ontario, Canada. [POSTER]
  • Barua, S., Konwarh, R., Mandal, M., & Karak, N. Greener approach to prepare polymer stabilized biocidal silver nanoparticles, National Workshop on Recent Trends on Nanoscience and Technology(2011), Bahona College, Jorhat, Assam, India. [POSTER]
  • Konwarh, R., Pramanik, S., Boruah, R., & Karak, N. Tailoring the photoluminescent attributes of nanoscaled polyaniline, in National Workshop on Nuclear and Atomic Techniques Based Pure and Applied Sciences (NATPAS 2011), Tezpur University, Assam, India. [POSTER]
  • Konwarh, R., Pramanik, S., Boruah, R., & Karak, N. Bioconjugation of Polyaniline nanofibers for avant garde applications, in National Conference on Smart Nanostructures (2011), Tezpur University, Assam, India. [ORAL]
  • Saikia, J.P., Konwarh, R., Konwar, B.K., Borah, N.N., & Karak, N. Immobilization of polyphenolic compound from Colocasia esculenta onto polymer supported magnetic nanoparticles and their efficacy as antioxidant and antimicrobial agent, in National Seminar on Medicinal Plant and Microbe Diversity and their pharmaceuticals (2010), Tezpur University, Assam, India. [POSTER]
  • Konwarh, R. Avant-garde materials at the intersection of polymeric nanocomposite, green technology and bioconjugation, in Young Scientist Colloquium (2010), Materials Research Society of India (MRSI), Kolkata Chapter, BESU, Shibpur, West Bengal, India. [ORAL]
  • Karak, N., Mahapatra, S.S., Dutta, S., Deka, H., Konwar, U., Das, G., & Konwarh, R. Polymer nanocomposites - multifaceted advanced materials for today’s society, in National Seminar on Photonics and Quantum Structures (2009), Tezpur University, Assam, India. [POSTER]