SCREENING OF PHYTOCHEMICAL CONSTITUENTS OF THE LEAVES OF CLINACANTHUS SIAMENSIS BREMEK AND CISSAMPELOS PAREIRA L USED AS ANTIDOTE FOR SNAKE BITE IN INDIGENOUS MEDICINE

Objective: The study is aimed to screen the phytochemical constituents of the medicinal plants Clinacanthus siamensis Bremek and Cissampelos pareira L used as anti snake venom in tribal medicine. Methods: The phytochemical compounds such as proteins, carbohydrates, lipids, phenols, tannins, flavonoids, saponins, steroids, terpenoids, coumarins, anthocyanin, glycosides, reducing sugars, lignins, anthoquinone and alkaloids were extracted by standard methods and compared the components for its antivenom activity. Results: Qualitative analysis of methanolic and aqueous extracts of leaves confirmed the presence of primary metabolites like proteins, carbohydrates, lipids and reducing sugars and secondary metabolites like phenols, tannins, flavonoids, glycosides, saponins, steroids, terpenoids, coumarins, lignins, anthocyanin, anthoquinone and alkaloids. Quantitative estimation of primary and secondary metabolites showed that the presence of proteins, flavonoids, tannins, alkaloids and lipids are more in Cissampelos pareira L when compared to Clinacanthus siamensis B. whereas the phenols and carbohydrates were more in Clinacanthus siamensis B. Conclusion: The study helped in the successful screening of phytochemical constituents which supports the traditional knowledge of the use of the plants as important medicine, as an antidote for poisonous snake bites and in curing various ailments

Antioxidant activity and Cytotoxic evaluation of Phytofabricated Silver Nanoparticles of Fig (Ficus mollis Vahl)

The present study aimed to evaluate Antioxidant and Cytotoxic activity of phytofabricated silver nanoparticles (FmF-AgNPs) derived from Figs of Ficus mollis. This green synthesized FmF-AgNPs were tested for antioxidant activity with DPPH assay and cytotoxicity activity against MCF-7 (Human breast adenocarcinoma cell lines) with MTT assay at various concentrations. The data obtained demonstrated that FmF-AgNPs posses both antioxidant activity and cytotoxicity activity which is dosage-dependent. In conclusion, results obtained revealed the potent therapeutic value of phytofabricated silver nanoparticles (FmF-AgNPs) can act as potent antioxidant and anticancer agent

Effect of electric field on the nematic-isotropic phase transition of compounds with a strong longitudinal dipole moment

We present calculations on the effect of an external electric field on the nematic-iso-tropic transition of compounds with strong longitudinal dipole moments. In such compounds neighbouring molecules have antiparallel correlations. We use the Bethe cluster model and the constant coupling approximation in our calculations. Assuming reasonable values of the dipole moment and polarizabilities of the molecules, it is predicted that the nematic-(field induced) paranematic transition becomes continuous for an internal field E ≈ 3250 esu, when the transition point is ~ 6°K above the field-free value

Antimicrobial activity of silver nanoparticles synthesized by using stem extract of Svensonia hyderobadensis (Walp.) Mold – A rare medicinal plant

Biosynthesis of silver nanoparticles was carried out by using stem extract for the reduction of aqueous silver ions in short period. The silver nanoparticles formation was confirmed by the colour change of plant extracts (SNPs) and further confirmed with the help of UV-Vis spectroscopy. These phytosynthesized silver nanoparticles were tested for antibacterial and antifungal activities using disc diffusion method. The test cultures are Proteus, Pseudomonas, Klebsiella, Bacillus and E.coli species of bacteria  and Aspergillus, Fusarium, Curvularia and Rhizopus species of fungal were used. The microbial property of silver nanoparticles was analyzed by measuring the inhibition zone. The SNPs synthesized from stem extract of Svensonia hyderobadensis showed moderately toxic towards E. coli, Klebsiella, Bacillus and Proteus species and highly toxic to Pseudomonas. Whereas in the fungal species moderately toxic to Aspergillus flavus,  Aspergillus niger, urvularia and Fusarium and highly toxic to Rhizopus species. The results indicate that the biological synthesized silver nanoparticles may have an important advantage over conventional antibiotics

Scaled particle theory of a system of right circular cylinders subjected to an attractive potential

We extend the scaled particle theory of a system of hard right circular cylinders by including a mean field attractive potential of the Maier and Saupe type. The order parameters, internal energy change, density change and the isothermal compressibility of the isotropic phase at the nematic-isotropic transition point are studied for various values of R the radius to height ratio of the cylinders. As in the case of the hard right circular cylinders, there is an approximate symmetry in the phase transition properties between the disc-like and rod-like regions when plotted as functions of the ratio of the larger to smaller dimension of the cylinders

The nematic-isotropic phase transition: application of the Andrews method

We have extended the Andrews method to derive the thermodynamic properties of an ensemble of spherocylinders. In the case of hard spherocylinders, by using the virial coefficients of the isotropic phase which agree with the results of recent computer simulation studies, we have determined several properties near the nematic-isotropic phase transition point in the mean field approximation. Including the attractive part of the potential, the values derived from the model are in reasonably good agreement with experimental data and in fact show considerable improvements over the currently available model calculations. In particular, the results are compared with those based on the scaled particle theory

Micropropagation of Dysophylla myosuroides (Roth.) Benth. In. Wall. through leaf culture

A method was developed through leaf as explant of Dysophylla myosuroides (Roth.) Benth. for multiple shoot regeneration. The effect of Auxins (IAA, NAA, IBA) and Cytokinins (BA) were studied on shoot regeneration in clulture. On MS half strength medium light green compact calli were formed with 0.1 mg l-1 NAA. The cultures produced 62.57 + 0.04 shoots on half strength medium with 0.5 mg l-1 BA and 0.01 mg l-1 NAA and also maximum mean length (0.52 + 0.02) of shoots were achieved. In vitro produced shoots rooted on half strength MS medium with 1 mg l-1 IBA. The in vitro regenerated plantlets were successfully acclimatized in paper cups containing vermiculate, then transferred to green house. Hardened plants were transplanted in to sand and soil (1 : 1)