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Wet chemical method has been employed for syntheses of nickel ferrite nanoparticles by using nitrate salts of iron and nickel as starting materials. Synthesized product was characterized in terms of thermal stability (TGA), phase determination (XRD) and structure elucidation (FT-IR). Thermal stability of the product was confirmed by TGA studies. Particle size was investigated as a reference of degree and duration of annealing temperature. A linear relationship was observed for size variation of the nickel ferrite nanoparticles with degree of annealing temperature, while size of nanoparticles remains almost constant for different time interval of duration of the annealing temperature. [ABSTRACT FROM AUTHOR]

One new tetracyclic triterpene ester (1) has been isolated from the chloroform-soluble portion of the whole plant of Nepeta suavis along with two known compounds, namely artemetin (2) and jaceidin (3). The structures of the isolated compounds were assigned on the basis of their 1H and 13C NMR spectra including two-dimensional NMR techniques such as COSY, HMQC, and HMBC experiments and comparison with the literature data. [ABSTRACT FROM AUTHOR]