Volatile constituents of essential oils isolated from the inflorescence and leaf of anisomeles indica [L.] O. Ktze.

The composition of the inflorescence and leaf essential oil of Anisomeles indica [L] O. Ktze. from Bangladesh was examined by GC-MS. Seventy-six components were identified in Inflorescence oil and 52 components were identified in leaf oil, accounting for 98.6% and 98.96% of the total yields, respectively. The main component in inflorescence oil was citronellyl propionate [16.12%]; citronellyl epoxide [13.71%]; [+] agathadiop [9.59%] and pinol D [7.58%]. On the other hand, leaf oil contained caryophyllene [62.52%], cadina, 1, 4-diene [5.50%] and triethanol amine [5.14%]. The composition of both oils varied qualitatively and quantitatively

Volatile constituents of essential oil isolated from the leaves of piper chaba hunt. Occuring in Bangladesh

The composition of the leaf essential oil of Piper chaba Hunt, from Bangladesh was examined by GC-MS. Ninety three components were identified in leaf oil accounting for 98.6% of the total yield. The main components in leaf oil were terpinolene [33.03%]. beta-pinene [8.23%], 8-cadinol [6.86%], y-elemene [4.90%], cedren-13-ol, 8-[4.77%], [+]-cyclosativene [3.43%] and nerolidyl acetate [3.15%]. The compositions of both oils varied qualitatively and quantitatively

Effect of planting time on growth and development of wedelia chinensis [osbek] merr. [mohavringaraj]

Linear regression equations based on growth of a medicinal herb Wedelia chinensis were compared for plants, grown in three different periods viz. 1st January [S[1]], 1st May [S[2]] and 1st September [S[3]]. A pot experiment was carried out to study the effect of planting time on growth and development of wedelia chinensis. Growth performance in terms of plant length, number of leaves, number of new leaves, number of branches and number of new branches were determined weekly for 10 weeks. The highest value of plant length, number of leaves and number of branches were found for S[2] and lowest for S[1]. Comparison of linear regression equations [total leaf number] showed that S[1] and S[3] took 23.23 and 6.72 times more period respectively than S[2] to produce a crop with the same number of leaves. Growth rate differences considered were temperature and rainfall related

Antimicrobial activity of lawsonia inermis linn

Leaf extracts of Lawsonia inermis Linn. [Lythraceae] were screened for their antimicrobial activity against 11 human pathogenic bacteria [Bacillus subtilis, B. cereus, B. megaterium, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Sal. paratyphi, Shigella dysenteriae, Sh. sonnei, and Vibrio cholerae] and 6 fungal phytopathogens [Alternaria alternata, Botryodiplodia theobromae, Colletotrichum corchori, Curvularia lunata, Fusarium equiseti and Macrophomina phaseolina]. During preliminary screening, the chloroform soluble fraction of L. inermis was found active against all the bacterial test organisms. The antifungal activities of extracts were found non-potential. VLC analysis of chloroform fraction showed 10 groups [A to J] depending on TLC behavior [Rf. value]. Fraction C showed highest antibacterial activity [20-41 mm] against all the pathogens tested at a concentration of 1000 microg/disc. GC/MS analysis of fraction C characterizes 14 components representing 89.14% of the total fraction. The major components were Diisooctylphthalate, 3-Octadecane [E], Heptadecane, 2, 6-Dimethyl etc

Essential oil analysis of callstemon lanceolatus DC. leaves from Bangladesh

Two samples of the essential oil obtained by hydrodistillation from leaves of Callistemon lanceolatus DC was analyzed by GC-MS. The oil yield was 0.70%. Fifty compounds were identified in the leaf oil. 1,8-cineole [51.22%], [E]-ocimene [22.89%], terpinyl acetate [7.46%] and beta-pinene [2.09%] were the major components representing 97.5% of the oil. The compositions of both oil samples varied qualitatively and quantitatively

Some tribal medicinal plants of Ghagra union of Rangamati district and their uses

Chakma is the largest tribal community in the Ghagra union of Rangamati District. Majority of them still depend on medicinal plants for the treatment of different ailments. A study was carried out in that area to document their knowledge about medicinal plants. 52 species under 38 families have been recorded which are used for the treatment of 43 diseases. Botanical name, tribal name, parts used and doses are mentioned

Antibacterial activity of 1,2-benzenedicarboxylic acid, diisooctyl ester isolated from the root of plumbago zeylanica linn

1,2-Benzenedicarboxylic acid, diisooctyl ester [diisooctyl phthalate] isolated from the roots of Plumbago zeylanica was screened for its antibacterial activity against eleven human pathogenic bacteria viz., Bacillus subtilis, B. cereus, B. megaterium. Escherichia coli, INABA ET [Vibrio], Shigella dysenteriae, S. sonnei, Salmonella typhi, S. paratyphi, Staphylococcus aureus and Pseudomonas mutabilis. The antibacterial activity of the compound was evaluated using the disc diffusion and macrodilution method. The compound showed moderate to good antibacterial activity against almost all the test bacterial pathogens. The largest zone of inhibition 22 mm, 14 mm, 11 mm, and 6 mm in diameter were recorded against Pseudomonas mutabilis at the concentration of 50 micro g, 20 micro g, 10 micro g and 5 micro g/disc respectively. The compound exhibited the lowest MIC [40 micro g/ml] against Bacillus subtilis, B. cereus, B. megaterium, Escherichia coli, Shigella sonnei, Salmonella paratyphi and Pseudomonas mutabilis and MBC [160 micro g/ml] against Bacillus cereus, B. megaterium, Escherichia coli and Pseudomonas mutabilis

Investigation on three types of aloe species from Bangladesh

Comparative studies on three species of Aloe from Bangladesh have been done for their growth performances, aloin content and laxative properties. Aloe indica found suitable in respect of rapid multiplication and growth, A. Vera for Albin content followed by Aloe species. The laxative properties was found higher in Aloe sp