Seaweeds

The synthesis, characterization and application of biologically synthesized nanomaterials are an important aspect in nanotechnology. Biological synthesis of silver nanoparticles has received a tremendous attention and has been a focus of research due to their high chemical, thermal stability and promising applications in medicinal field due to its environmental friendly approach and also low cost techniques. In the present study silver nanoparticles were synthesized using the aqueous extract of red seaweed Gracilaria dura (Ag.) J.Ag. as the reducing agent. The formation of silver nanoparticles was confirmed by colour change, UV-Visible Spectroscopy, FT-IR and X-Ray Diffraction Method (XRD). The nanoparticles showed an absorbance at 446nm on UV-Vis spectroscopy. The presence of proteins was identified by Fourier Transform-Infra Red spectroscopy (FT-IR).The presence of elemental silver was characterized by X-Ray Diffraction Method (XRD).These results not only provide a green approach for the synthesis of nanoparticles but also open a door for new pharmaceutical leads.

The present report deals with the study of phytochemicals present in Padina tetrastromatica Hauck collected from the south east coast of Tamil Nadu, India. The phytochemicals of different extracts was analyzed by the standard procedure for UV-Vis spectroscopic and HPLC. The UV-Vis phytochemical profile of different extracts of Padina tetrastromatica Hauck was predicted. The qualitative HPLC fingerprint profile of methanol extract of Padina tetrastromatica Hauck was chosen at a wavelength of 660 nm due to sharpness of the peaks and suitable baseline. The profile showed one prominent peak at a retention time of 1.500 min and seven moderate peaks were also noted at the retention times of 2.220, 2.400, 2.500, 2.800, 3.000, 3.300 and 6.300 min respectively. The present study on Padina tetrastromatica Hauck fashioned a novel phytochemical marker in standardization of the quality of the drug used for medicine.

The present study was aimed to explore the phytochemical constituents present in Turbinaria ornata (Turner) J.Ag. collected from the south east coast of Tamil Nadu, India. The phytochemical screening of different extracts was estimated using the standard procedure for UV-Vis spectroscopic and HPLC. The UV-Vis phytochemical profile of various extracts of Turbinaria ornata (Turner) J.Ag. was analyzed. The qualitative HPLC fingerprint profile of methanol extract of Turbinaria ornata (Turner) J.Ag. was selected at a wavelength of 254 nm due to sharpness of the peaks and proper baseline. The profile displayed one prominent peak at a retention time of 1.953 min and some moderate peaks were observed at a retention time of 3.000, 2.570 and 2.467 min respectively. The present study on Turbinaria ornata (Turner) J.Ag. produced novel phytochemical markers in standardization as useful analytical tools to check not only the quality of the powder but also the presence of adulterants in ayurvedic drugs.