The present study has been focused on the extraction of natural dyes from Curcuma longa, Trigonella foenumgraecumandNeriumoleanderandinvestigationoftheirphytochemicalandpharmacologicalchar-acteristics. Dyes were prepared using aqueous, acidic, alcoholic and alkaline extraction techniques. UV spectralstudiesofthedyesshowedavariationinabsorptionmaximaandtheircolorvariedwithrespectto thepHandthesolventusedduringextraction.Thedyespreparedfromturmericusingaqueousextraction technique and from fenugreek using alkaline extraction showed good antibacterial activity. The aque-ous and alcoholic extraction of Nerium oleander was able to inhibit the growth of many fungal strains including Tricoderma spp., Tricophyton rubrum, Candida albicans, Aspergillus niger, Cladosporium spp. etc. The antimicrobial property of the dyes was used in developing antimicrobial fabric.
The present study has been focused on the extraction of natural dyes from Curcuma longa, Trigonella foenumgraecumandNeriumoleanderandinvestigationoftheirphytochemicalandpharmacologicalchar-acteristics. Dyes were prepared using aqueous, acidic, alcoholic and alkaline extraction techniques. UV spectralstudiesofthedyesshowedavariationinabsorptionmaximaandtheircolorvariedwithrespectto thepHandthesolventusedduringextraction.Thedyespreparedfromturmericusingaqueousextraction technique and from fenugreek using alkaline extraction showed good antibacterial activity. The aque-ous and alcoholic extraction of Nerium oleander was able to inhibit the growth of many fungal strains including Tricoderma spp., Tricophyton rubrum, Candida albicans, Aspergillus niger, Cladosporium spp. etc. The antimicrobial property of the dyes was used in developing antimicrobial fabric.
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