Owing to the ethno-medicinal importance of Mentha arvensis L. the present study proposes in-vitro screening of different aerial parts of the plant. Instead of using whole plant, different parts of a plant can also be used which helps in sustainable management of medicinal plants. Phytochemical, antioxidant and antimicrobial activity study of young and mature leaves, inflorescence and stem of the plant was carried out using standard laboratory methods to determine their efficiency against some bacterial and fungal strains. Inflorescence recorded better extraction of phenol and flavonoid content.

Lamiaceae members are commonly used in ethno-medicinal practices of our country. The in vitro antibacterial and antifungal activity of various solvents extracts of different aerial parts of Ocimum americanum L., O. basilicum L. and O. sanctum L. wereassessed on standard bacterial and fungal strains using standard laboratory methods. Extracts from O. americanum have inhibitory activity against B. subtilis, B. cereus and S. aureus.Acetone extracts of O. basilicum and O. sanctum were found to be more potent being capable of exerting significant inhibitory activities against majority of the bacteria investigated. Acetone extract of young inflorescence of O. americanum showed highest antibacterial activity against B. cereus (14±1mm) which was also higher (10±1mm) than the inhibition of standard Clotrimazole (10mcg). Hot petroleum ether extract of mature leaves of O. basilicum showed highest activity against E. coli (16±2mm) which was also higher than the inhibition ofAmpicillin, Streptomycitin, Erythromycin.Petroleum ether extract of young leaves of O. sanctum recorded highest inhibition against P. vulgaris (20±2mm). Presence of tannins, flavonoids, saponins, phenols in all the parts of the plants. Use of different parts instead of using whole plant will help in sustainable management of these medicinal plants.

The main aim of the study was to determine the phytoconstituents present in different aerial parts of Leucas aspera (Willd.)Link and their antioxidant and antimicrobial activity collected from Dibrugarh, Assam. Acetone extract of young leaves recorded higher (6.00±0.12mgCE/g extract and 3.05±0.04mgQE/g extract respectively) phenol and flavonoid content. Methanol extract of young leaves recorded highest (83.84±0.68% and 88.09±0.04% respectively) antioxidant activity against DPPH and ABTS at 500μl of sample at 1mg/ml of concentration. Acetone extracts recorded higher antimicrobial activity than other extracts of the plant. The different solvent extract recorded antibacterial and antifungal activity. Using GC-MS analysis, hexane broad fraction of inflorescence was analysed for the phytoconstituent present in it. GC-MS analysis was done in Bombay, IIT, SAIF and the analysis revealed the presence of phytoconstituents like-7,9-Ditert-butyl-1-oxaspiro(4

No abstract

Terminalia bellerica (Gaertn.) Roxb. is widely cultivated plant due to its significance use as traditional medicine. The fruits of the plant were collected from Dibrugarh district of Assam, India. The present study aimed to evaluate the phytochemical, antioxidant and antimicrobial activity of different solvent extracts of the fruits of Terminalia bellerica. Antioxidant and phytochemical analysis were carried out using standard methods and the results revealed the presence of tannins, flavonoids, phenols and glycosides in the fruit sample. Among the solvent used for the extraction process, Ethyl acetate extract recorded the highest phenol content (6.56±0.004mgCE/gm dried body weight) and antioxidant activity (67.00± 0.12%) against DPPH. Similarly, ethyl acetate extract recorded the highest (22±1mm) inhibition against B. subtilis compared to Chloramphenicol (30mcg) and Clotrimazole (10mcg). It is concluded that the ethyl acetate extract of the fruits Terminelia bellerica yielded the best results and more efficacious in terms of antimicrobial activity which makes it more useful in new drug development.