Author
Padma S. Vankar
Other affiliations: University of Konstanz
Bio: Padma S. Vankar is an academic researcher from Indian Institute of Technology Kanpur. The author has contributed to research in topics: Dyeing & Mordant. The author has an hindex of 24, co-authored 96 publications receiving 1957 citations. Previous affiliations of Padma S. Vankar include University of Konstanz.
Topics: Dyeing, Mordant, Natural dye, Permanganate, Biosorption
Papers published on a yearly basis
Papers
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TL;DR: Two-stage ultrasonic dyeing of cotton and silk fabrics with natural dyes, Terminalia arjuna, Punica granatum, and Rheum emodi have been developed in which an enzyme is complexed with tannic acid first as a pretreatment as discussed by the authors.
190 citations
TL;DR: In this paper, aqueous extract of lemon leaves (Citrus limon) was used as reducing agent and encapsulating cage for the silver nanoparticles for durable textile finish on cotton and silk fabrics.
Abstract: Preparation of silver nanoparticles have been carried out using aqueous extract of lemon leaves (Citrus limon) which acts as reducing agent and encapsulating cage for the silver nanoparticles. These silver nanoparticles have been used for durable textile finish on cotton and silk fabrics. Remarkable antifungal activity has been observed in the treated fabrics. The antimicrobial activity of silver nanoparticles derived from lemon leaves showed enhancement in activity due to synergistic effect of silver and essential oil components of lemon leaves. The present investigation shows the extracellular synthesis of highly stable silver nanoparticles by biotransformation using the extract of lemon leaves by controlled reduction of the Ag+ ion to Ag0. Further the silver nanoparticles were used for antifungal treatment of fabrics which was tested by antifungal activity assessment of textile material by Agar diffusion method against Fusarium oxysporum and Alternaria brassicicola. Formation of the metallic nanoparticles was established by FT–IR, UV–Visible spectroscopy, transmission electron microscopy, scanning electron microscopy, atomic force microscopy.
183 citations
TL;DR: Rubia cordifolia (Tamin, local name) produces anthraquinone reddish orange dyes in roots, stem and leaves, which has been used for dyeing textiles since ancient times.
140 citations
124 citations
Journal Article•
TL;DR: The study suggests that M. jalapa flowers can be a cheap source as a reductant for the production of gold nanoparticles and reports a rapid and convenient method to reductively prepare gold nanoparticle from auric chloride using aqueous extract of Mirabilis jAlapa flowers.
Abstract: Biosynthesis of gold nanoparticles has emerged as an important area in nanotechnology and biotechnology due to growing need to develop environmentally benign technologies. Generally, nanoparticles are prepared by a variety of chemical methods which are not environmentally friendly. In the present study, we report a rapid and convenient method to reductively prepare gold nanoparticles from auric chloride using aqueous extract of Mirabilis jalapa flowers. The flower extract acts as a reducing agent and encapsulating cage for the gold nanoparticles. The production of gold nanoparticles has been done by the controlled reduction of the Au3+ ion to Au0. The formation of gold nanoparticles has been established by FT-IR and UV-Vis spectroscopy, as well as by TEM, XRD, EDAX and AFM. The study suggests that M. jalapa flowers can be a cheap source as a reductant for the production of gold nanoparticles.
97 citations
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TL;DR: This review is aimed to discuss different extraction techniques along with their basic mechanism for extracting bioactive compounds from medicinal plants.
1,754 citations
TL;DR: This review aim to describe and compare the most commonly used methods based on their principle, strength and limitation to help evaluating the suitability and economic feasibility of the methods.
Abstract: Medicinal plants are gaining much interest recently because their use in ethno medicine treating common disease such as cold, fever and other medicinal claims are now supported with sound scientific evidences. The study on medicinal plants started with extraction procedures that play a critical role to the extraction outcomes (e.g. yield and phytochemicals content) and also to the consequent assays performed. A wide range of technologies with different methods of extraction is available nowadays. Hence, this review aim to describe and compare the most commonly used methods based on their principle, strength and limitation to help evaluating the suitability and economic feasibility of the methods.
800 citations
TL;DR: The GGEC-2008-057 record was created on 2008-01-23, modified on 2016-08-08 as discussed by the authors, and was later extended to the present version.
Abstract: Reference GGEC-ARTICLE-2008-057doi:10.1002/jctb.1873View record in Web of Science Record created on 2008-01-23, modified on 2016-08-08
798 citations
720 citations
TL;DR: In this article, a review encompasses a summary of research performed in last 15 years (1998-2013) in different arenas of applications of natural dyes, with specific reference to technological development in natural textile dyeing and use of natural Dyes in functional finishing of textiles, food coloration and dye-sensitized solar cells.
681 citations