The separation of 5-fluorouracil was carried out on a C18 reverse phase column using 40 mM KH2PO4 as
mobile phase. The ultraviolet detection wavelength was 260 nm. selleck screening library The HPLC method was validated and the response of the drug was linear in the concentration range of 20 mu g ml(-1) to 550 mu g ml(-1) with a correlation coefficient of 0.9995. The % R. S. D. values for intra-day and inter-day precision were determined as <0.2% and <1% respectively. Infrared spectroscopic measurements were carried out in diffuse reflectance and attenuated total reflectance (ATR) modes. The study reveals that 5-flurouracil shows mild degradation up to 275 degrees C and major degradation at about 285 degrees C. It undergoes a degradation of about 22% when exposed to stress conditions of acidic hydrolysis. A major degradation of about
97% was observed under alkaline condition. The drug undergoes degradation from 26% to 41% when exposed to oxidative condition. The drug remains stable when exposed to UV irradiations.”
“In this work, the self-monitoring capability of epoxy matrix-carbon fiber composites has been studied. Different concentrations and arrangements of reinforcements were used, including random chopped, unidirectional and bi-directional continuous carbon fibers, weaved and nonweaved. Mechanical properties were determined by uniaxial tensile tests. The composite electric to mechanical behavior was established by determining its electrical resistivity variation as a function of the stress-strain curve. It was observed that the composites electrical Prexasertib cell line resistance increased during tensile tests,
a trend that indicates piezoresistive behavior. The increase was linear for the chopped reinforced composites, while it exhibits different slopes in”
“We report synthesis of phase selleck products pure multiferroic YMnO3 thin films on sapphire (0001) with conducting ZnGaO buffer contact layer. Films were prepared by using pulsed laser deposition technique and characterized using x-ray diffraction, scanning electron microscopy, energy dispersive absorption spectroscopy, and magnetic field dependent dielectric measurement techniques. Structural characterizations indicated phase purity and epitaxial nature of the films. The dielectric response indicated an anomaly in dielectric constant epsilon and tan delta in the vicinity of 30 K, well below the bulk Neacuteel temperature similar to 70 K. This anomaly in epsilon and tan delta and its magnetic field dependence is explained as an influence of strain due to lattice mismatch between the substrate and YMnO3 film. A substantial enhancement in magnetocapacitance was also observed for magnetic field applied parallel to ab plane of the film. Our results show that it is possible to tune the multiferroic property of YMnO3 via changes in ferroelastic route.