Analytical methods employed for the determination of drugs and metabolites in biological matrices such as urine, plasma and serum are essential throughout drug discovery and development. It is well-known that, analytical techniques are constantly undergoing change and improvements and each analytical method has its own characteristics which may vary from analyte to analyte at different conditio...

The vase life of cut flowers and foliage is often shortened by vascular occlusions that constrict vase solution supply. Reduction in stem conductivity is typically caused by blockage of cut stem ends and xylem conduits by microbes, physiological plugging, and disruption of water columns in xylem vessels by cavitations and air emboli. Cut flower and foliage longevity can be greatly affected by t...

A simple, rapid and selective method was developed for the estimation of amlodipine from human plasma. The method involves a simple protein precipitation techniques using nifedipine as internal standard. Chromatographic separation was carried out on a reverse phase C18 column using mixture of 50 mM potassium di hydrogen ortho phosphate (pH 7.5) and acetonitrile (60:40, v/v) at a flow rate of 1....

Regardless of their maturity at harvest, the vase life of cut inflorescences of the hybrid Limonium ‘Fantasia’ placed in deionized water was 4 to 5 days. A vase solution containing Physan (a quaternary ammonium disinfectant solution) at 200 μl•liter–1 and 20 g sucrose/liter not only prolonged the longevity of individual florets but also promoted bud opening so that the vase life of cut inflores...

A new transformation of a subclass of LR(k) grammars into equivalent LL(k) grammars is studied. The subclass of LR(k) grammars is called extended k-transformable. The transformed LL(k) grammars left-to-right cover the original LR(k) grammars. Previous transformations transform k-transformable and PLR(k) subclasses of LR(k) into LL(k). The new transformation is more powerful in that it handles t...