Objective: To develop and validate simple, rapid, precise, accurate, and economical UV spectrophotometric and reverse phase high performance liquid chromatographic methods for the estimation of alogliptin benzoate (AGP). Methods: UV spectrophotometric method was performed using UV/Vis double beam spectrophotometer with a spectral bandwidth of 1 nm and 1.0 cm matched quartz cells. The maximum ab...

the present study concentrates on the synthesis of au nanoparticles (aunps) using aqueous solution of polyvinylpyrrolidone (pvp) and tetrachloroaurate by different methods as thermal, sonochemical and electrochemical reduction. the pvp has been used as a reducing agent and acts as a stabilizer for au nano particles that obtained as principal product. in all synthesis procedures, the active radi...

a novel podand based anion receptor bearing benzimidazole motifs as recognition sites was designed and synthesized by reaction of 1,7-bis(2'-methylbenzoate)-1,4,7-trioxaheptane and phenylenediamine. the binding properties of anionic guest with this receptor were studied using uv-vis and fluorescence spectroscopy. these studies revealed that this receptor exhibit selective recognition towards f- ...

the main objective of this research was to synthesize and characterize gold-coated fe3o4 /sio2 nanoshells for clinical applications. magnetite nanoparticles (nps) were prepared via co-precipitation. the results showed that smaller particles can be synthesized by decreasing the naoh concentration, which in our case this corresponded to 35 nm by using 0.9 m of naoh at 750 rpm. the nps were then m...

The analysis of carotinoids is usually performed by HPLC with UV/VIS detection. Different geometric isomers can be separated using C30 stationary phases [1]. However, the complexity of most matrices makes an unequivocal identification very difficult. For this reason we investigated the use of an ion trap analyzer for the identification of carotinoids in spinach. Since carotinoids are rather non...

[1]Zirconametalloarenophanes [Cr(η(5)-C(5)H(4))ZrCp'(2)(η(7)-C(7)H(6))] and [Mn(η(5)-C(5)H(4))ZrCp'(2)(η(6)-C(6)H(5))] (Cp' = C(5)H(4)(t)Bu) have been isolated for the first time. These species represent potential precursors en route to metal-enriched metallopolymers by ROP. The electronic structure was assessed by means of UV-visible spectroscopy and TD-DFT calculations.

A technique to detect residual tetracyclines (TCs) in honey by HPLC and derivative UV-Vis spectra is examined in this study. Chromatograms of honey products often experience overlapped peaks and sloping background due to similar retention properties of components or to the presence of impurities. The derivatives provide resolution of overlapped peaks in an UV-Vis spectrum and eventually bring c...