Bioactive constituents, sorption behaviour, antioxidant and antimicrobial activity of solar dried ajwain (Trachyspermum copticum L.) leaves

Authors

  • Galla Narsing Rao CSIR-Central Food Technological Research Institute, Resource Centre, Hyderabad 500007, Telangana, India
  • Guruguntla Sulochanamma CSIR-Central Food Technological Research Institute, Resource Centre, Hyderabad 500007, Telangana, India
  • Dasari Madhusudhan Rao CSIR-Central Food Technological Research Institute, Resource Centre, Hyderabad 500007, Telangana, India
  • Kripanand Sathiya Mala CSIR-Central Food Technological Research Institute, Resource Centre, Hyderabad 500007, Telangana, India

DOI:

https://doi.org/10.56042/ijnpr.v14i2.4212

Keywords:

Antimicrobial activity, Antioxidant activity, Bioactive components, Solar dried ajwain leaves, Sorption studies

Abstract

The stability of active compounds, sorption studies, and antioxidant and antimicrobial activity of solar-dried ajwain (Trachyspermum copticum L.) leaves were studied. Fresh ajwain leaf (FAL) on solar drying yielded solar-dried ajwain leaf (SDAL) and was packed in polyethylene pouches for further studies. SDAL was rich in protein, fibre and mineral matter. Active compounds such as β-carotene (17 and 89 mg/100 g) and total chlorophyll (112 and 82 mg/100 g) contents were found in FAL and SDAL respectively. Similarly, higher ascorbic acid and polyphenols content were found in SDAL. Moisture sorption isotherm studies indicated that the SDAL was found to be non-hygroscopic in nature and stable at room temperature. Antioxidant activity as assayed by methanolic extract indicated SDAL had better activity than FAL. The ethanol extract of FAL and SDAL was evaluated for antimicrobial activity by disc diffusion method, which showed that the extract was sensitive at 20 µg/mL concentration on Gram-negative and positive bacteria. The study encourages the isolation and characterization of active ingredients from FAL and SDAL and their application in foods as nutraceuticals.

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Published

2023-07-26

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Articles