a simple, accurate and rapid high performance thin layer chromatography (hptlc)-densitometric method was developed for separation and determination of cetirizine (cet) as a long acting antihistamine and montelukast (mon) as an antileukotriene in pharmaceutical dosage forms. the compounds were separated on silica gel 60 f254 hptlc plates using a mixture of ethyl acetate : methanol : ammonia solu...

the substances responsible for saffron’s characteristic quality are crocins, picrocrocin, and safranal. the drying process is critical to the saffron quality as measured by levels of secondary metabolites, crocin (color and anti-tumor properties), picrocrocin (taste), and safranal (aroma). four different dehydration methods were evaluated: iranian traditional method (room temperature); dehydrat...

At present, when increasing uncertainty, volatility and turbulence are the main attributes of economic activity, role risk management as a tool for ensuring financial security entities is increasing. Risk provides forecast in simple understandable form, suggests directions methods mitigation. For most business entities, quantitative assessment acceptable understandable, therefore, recent decade...