Several Plant products have been found to be a part of phytomedicines since time immemorial. These plant products can be derived from barks, leaves, flowers, roots, fruits, and seeds. It has been found that the light radiation affects the antimicrobial activity of herbal products. The present study was aimed to investigate the phytochemical screening and antimicrobial activities of Calotropis gigantea leaf extracts. In addition to these studies we also check the effect of UV light radiation on the anti microbial activity of leaf extract. Phytochemical screening revealed the presence of various active phytochemicals in the extracts of aerial part of Calotropis gigantea. Ethanol, chloroform and hexane extract of leaves were tested against Clostridium botulinum, Proteus vulgaris, Escherichia coli and Arthrographis cuboid, Aspergillus fumigatus, Aspergillus niger by the agar disc diffusion method. The antimicrobial activity of the extracts generally reduces significantly after exposure to the UV radiations.

Research on the profile of Fe in the seagrass ecosystem has been carried out. Analysis of seawater, sediment, seagrass samples from the association of mangroves, mangroves-coral reefs and coral reefs taken in the waters of Donggala Regency was carried out using the ICP-OES method (Inductively Coupled Plasma-Opticaly Emission Spectrometry). It turns out that seagrasses associated with mangroves have higher iron concentration in their ecosystem, both in waters, sediments, and in seagrass plants and will be lower in association with mangroves and their association with coral reefs. Likewise, the status of seagrass has a higher concentration of Fe than infertile status or poor status. The results become some reference to show that seagrass plants can be bio-indicators of marine waters fertility.

In this study, the selective oximation of structurally diverse aromatic aldehydes (versus ketones) to the corresponding aldoxime derivatives was investigated using the combination system of NH₂OH.HCl and bisthiourea complexes of cobalt, nickel, copper and zinc chlorides, M^II(tu)₂Cl₂, in a mixture of CH₃CN‒H₂O (1:1 mL). All reactions were carried out successfully at room temperature within the immediate time up to 130 min giving the products in high yields. Investigation of the results exhibited that the applied bis-thiourea metal complexes show the catalytic activity in order of Co(tu)₂Cl₂₂Cl₂₂Cl₂₂Cl₂ in their oximation reactions.

The interaction of (2-aryl-5-(hydroxyalkylamino)-1,3-oxazol-4-yl)phosphonates with hydrogen chloride, hydrogen iodide and hydrogen thiocyanate in anhydrous medium led to formation of new phosphorylated peptidomimetics containing C-terminal ω-haloalkyl and ω-thiocyanoethyl residues.

A novel trimetallic W-Mg-Al oxide composites immobilised onto starch were synthesized via sol-gel method. W-Mg-Al oxide composites were synthesized by first preparing WO₃ using incipient wetness method, followed by immobilising onto MgO-Al₂O₃ support using starch as binder. The effects of starch addition on the crystal properties and morphology were investigated by X-ray diffraction (XRD), Fourier Transform Infrared (FT-IR) spectroscopy and Scanning Electron Microscopy (SEM). In the presence of hydrogen peroxide and acetic acid as oxidant system, W-Mg-Al oxide starch composites exhibited higher catalytic performances for oxidative desulphurisation (ODS) of dibenzothiophene (DBT) at 95% compared to W-Mg-Al oxide composites. The catalytic activity observed could be correlated to the distribution of active phases on starch as well as the higher crystallinity of the metal oxide composites.