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Showing posts from January, 2015

Comparative antibacterial studies of in vivo and in vitro leaves of Lawsonia inermis L.- A multipurpose medicinal plant

Plant Science Research 35 (1&2) : 47-50, 2014 A. Moharana1, S. Kumar1, P. K. Jena1, S. K. Naik1, S. Bal2 and D. P. Barik1Ψ 1 Department of Botany, Ravenshaw University, Cuttack-753 003, Odisha, India 2 Directroate of Oil Seed Research, Hyderabad-500 030, TG, India Abstract A comparative antibacterial study of in vivo and in vitro leaf extracts was performed against four different bacterial strains viz., Streptococcus pyogenes, Streptococcus mutans, Shigella flexnerii and Salmonella enteric-typhii. Both types of leaf materials (in vivo and in vitro) of L. inermis screened for four different solvent systems, showed anti-bacterial activity (MIC values) against all human pathogenic bacteria tested. Of the four bacterial strains evaluated, the best MIC value (200 μg/ml) was observed in in vitro leaf extract of all the solvent system against Streptococcus pyogenes. Acetone and n-hexane in vitro leaf extract was found to be more effective (MIC = 200 μg/ml) than in vivo leaf extrac

Natural dye-yielding plants of tribal Odisha

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Plant Lovers' Association, Bhubaneswar Sabujima, 23: 23-25 Natural dye-yielding plants of tribal Odisha Sanjeet Kumar and Padan Kumar Jena Department of Botany, Ravenshaw University, Cuttack-753003, Odisha sanjeet.biotech@gmail.com Color is of paramount importance in nature that makes human living more aesthetic and fascinating. It is supposed to be associated with seasons, festivals, human emotions, qualities and passion of life. A dye gives a color. A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is applied. A dye, which is resistance to light, water and soap. There are two types of dye, natural and synthetics. Natural dyes are dyes or colorants derived from plants , animals, minerals or other natural resources whereas synthetic dyes are synthesised from different chemicals. The majority of natural dyes are obtained from plant parts, such as leaves, flowers, rhizomes, tubers, fruits, bark and