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Publikasjoner (4 av 4) Visa alla publikasjoner
Iyer, S., Nemeshwaree, B. & Nierstrasz, V. (2019). Measurement of luminescence intensity on textiles using Luminous bacterial biocatalytic system. In: : . Paper presented at Textile Science and Economy 2019 French - Croatian Forum, Zagreb, Croatia, January 23-24, 2019. (pp. 29). Zagreb
Åpne denne publikasjonen i ny fane eller vindu >>Measurement of luminescence intensity on textiles using Luminous bacterial biocatalytic system
2019 (engelsk)Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
Abstract [en]

Nature is the most exquisite thing around us with the existence of living organisms exhibiting different phenomena such as water repel/ency, touch sensitive plant and chameleon skin. Some of these phenomena inspired scientists to explore and design smart fabrics biomimicking the behaviour or pattern in living organisms. Bioluminescence is one such phenomenon where-in different living organisms such as firefly, jelly fish and crustaceans have the ability to impart visible light of specific wavelength, by enzyme catalysed reactions. Existence and study of such light emitting living organisms have been carried out, and harnessing these reactions has already transformed significant areas of medical field and clinical diagnosis, but research work on transforming this into living light is limited. In the present study, luminous bacterial system was investigated to assess and detect the bioluminescence behaviour onto the textile material. In the Luminous bacterial system, in vivo biochemical mecha­nism involves two different enzymes as well as different substrate components. Emission of light due to in vivo luminous bacterial reaction mechanism is seen in visible region. For in vitro reaction mechanism study, physical adsorption technique was used to graft both enzymes on plasma activated PET nonwoven textile and when substrates were introduced manually during the analysis, the biochemical reaction leading to light production occured. A Luminometer equipment was used to determine the light intensity in terms of Relative light units (RLU). The measurement results were obtained for nonwoven plasma treated PET with enzyme and substrate addition at different concentration and RLU value was obtained. The analysis data revealed that light intensity in RLU could be recorded by introducing both the enzymes and substrates on textile material, however intensive research is required in order to observe emitted light through the naked eye. The research study will help to attain

sted, utgiver, år, opplag, sider
Zagreb: , 2019
HSV kategori
Identifikatorer
urn:nbn:se:hb:diva-22281 (URN)
Konferanse
Textile Science and Economy 2019 French - Croatian Forum, Zagreb, Croatia, January 23-24, 2019.
Tilgjengelig fra: 2019-12-19 Laget: 2019-12-19 Sist oppdatert: 2019-12-20bibliografisk kontrollert
Iyer, S., Nierstrasz, V., Behary, N., Guan, J. & Chen, G. (2019). Study of photoluminescence property on cellulosic fabric using multifunctional biomaterials riboflavin and its derivative Flavin mononucleotide. Scientific Reports (9), Article ID 8696.
Åpne denne publikasjonen i ny fane eller vindu >>Study of photoluminescence property on cellulosic fabric using multifunctional biomaterials riboflavin and its derivative Flavin mononucleotide
Vise andre…
2019 (engelsk)Inngår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, nr 9, artikkel-id 8696Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Flavins are ubiquitous in nature and participate in various biochemical reactions mainly in the form of coenzyme Flavin mononucleotide (FMN) or as precursor such as Riboflavin (RF). Both flavins, RF and FMN are multifunctional bio-based molecules yielding yellow coloration and exhibit photoluminescence, UV protection, and redox properties. The aim of the present research study was to investigate the diffusion method as a technique to obtain photoluminescent cellulosic fabric using multifunctional RF and FMN. The photoluminescent moiety RF and FMN exhibited three maximum absorbance peaks at about 270 nm, 370 nm and 446 nm in aqueous solution at pH 7. The solutions of RF and FMN with concentration 4% and 20% (owf) at pH 7 were prepared and used in diffusion method for cellulosic fabric dyeing. The study involved the determination of color performance and evaluation of luminescence property of the dyed fabric using UV-visible spectrophotometer and photoluminescence spectroscopy, respectively. Under monochromatic UV lamp exposure emitting at 370 nm, the dyed fabric showed an intense emission of greenish yellow color, which was later confirmed by the intense photoluminescence observed at a wavelength of about 570 nm. The study demonstrates the theoretical evaluation of quantum efficiency (φ) obtaining maximum φ value of 0.28. Higher color strength value and improved wash fastness were obtained by treatment with different biobased mordants such as tannic acid and citric acid as well as calcium chloride for both RF and FMN. Additionally, ultraviolet (UV) protection ability for both RF and FMN dyed fabric were determined and showed UPF factor of 50+ and 35 respectively. The work allowed us to explore the photoluminescence property of riboflavin and Flavin mononucleotide for its application in the field of textiles as a new scope of producing photoluminescent textile along with multifunctional properties such as coloration and UV protection.

sted, utgiver, år, opplag, sider
London: Nature Publishing Group, 2019
Emneord
Riboflavin, Flavin mononucleotide, Diffusion, Photoluminescent textile, Bio-based mordants, Ultraviolet protection ability.
HSV kategori
Forskningsprogram
Textil och mode (generell)
Identifikatorer
urn:nbn:se:hb:diva-21447 (URN)10.1038/s41598-019-45021-5 (DOI)000471868600011 ()31354023 (PubMedID)2-s2.0-85067566758 (Scopus ID)
Forskningsfinansiär
EU, European Research Council, SMDTEX 2016-42
Tilgjengelig fra: 2019-12-19 Laget: 2019-12-19 Sist oppdatert: 2020-01-29bibliografisk kontrollert
IYER, S. & Nierstrasz, V. (2018). Photoluminescent textile using biobased riboflavin derivative (FMN). In: 18th AUTEX World Textile Conference, Istanbul, Turkey: . Paper presented at 18th AUTEX World Textile Conference, Istanbul, June 20-22, 2018 (pp. 1-4). Institute of Physics (IOP), Article ID 3471.
Åpne denne publikasjonen i ny fane eller vindu >>Photoluminescent textile using biobased riboflavin derivative (FMN)
2018 (engelsk)Inngår i: 18th AUTEX World Textile Conference, Istanbul, Turkey, Institute of Physics (IOP), 2018, s. 1-4, artikkel-id 3471Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

Riboflavin derivative such as Flavin mononucleotide possesses distinctive biological and physicochemical properties such as photosensitivity, redox activity and fluorescence. Flavin mononucleotide widely known as FMN is a biomolecule having molecular formula as C17H20N4NaO9P and is produced from biobased riboflavin by enzymatic reaction in living organisms. In contrast to riboflavin which is sparingly soluble in water, FMN is highly water soluble due to the presence of an ionic phosphate group. The presence of isoalloxazine ring in FMN is responsible for its properties such as UV absorption and fluorescence. This study evaluates the potential use of Flavin mononucleotide (FMN) for production of photoluminescent textile.

sted, utgiver, år, opplag, sider
Institute of Physics (IOP), 2018
HSV kategori
Identifikatorer
urn:nbn:se:hb:diva-14905 (URN)
Konferanse
18th AUTEX World Textile Conference, Istanbul, June 20-22, 2018
Forskningsfinansiär
EU, European Research Council
Tilgjengelig fra: 2018-08-08 Laget: 2018-08-08 Sist oppdatert: 2018-11-16bibliografisk kontrollert
Iyer, S., Behary, N. & Nierstrasz, V. (2017). Bio-inspired approaches to design bio-luminescent textiles. In: : . Paper presented at Designer biology, from proteins and cells to scaffolds and materials, Vienna, June 7–9, 2017..
Åpne denne publikasjonen i ny fane eller vindu >>Bio-inspired approaches to design bio-luminescent textiles
2017 (engelsk)Konferansepaper, Oral presentation with published abstract (Fagfellevurdert)
Abstract [en]

Luminescent textiles are being increasingly used in apparel and sportswear aswell as in buildings, agriculture and automotives, for safety alert or forillumination or as a design feature[1]. Till now these luminescent textiles havebeen based on technologies such as LED, luminescent particles (rare earthmetals and metal oxides), which are not so eco‐friendly[2].Bio‐inspired strategies can provide efficient methods to achieve eco friendlybioluminescent textiles. Research projects have explored ways which aremainly based on culture of bioluminescent algae[3] or bacteria on textiles.Here we present another approach to achieve bioluminesence using biobasedproducts from various living organisms such as fireflies, fungi, earthwormsthat are found in land and in jelly fishes, shrimps, dinoflagellates, corals inmarine environment [4]. In order to mimic the luminescence effect seen innature, reaction mechanisms in various bioluminescent living organisms arestudied and the components or molecules responsible for luminescence areidentified [5‐10]. Most of the time, these involve enzymatic reactions.However the main challenge is to reproduce the bioluminescent mechanismand to adapt it to new materials which can yield some eco efficient bioinspired luminescent textiles.

HSV kategori
Identifikatorer
urn:nbn:se:hb:diva-22268 (URN)
Konferanse
Designer biology, from proteins and cells to scaffolds and materials, Vienna, June 7–9, 2017.
Tilgjengelig fra: 2019-12-19 Laget: 2019-12-19 Sist oppdatert: 2019-12-20bibliografisk kontrollert
Organisasjoner
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-9671-1242