separation of ten sedative- hypnotic drugs was performed by rp-hplc using mixed micellar mobile phase. effect of temperature, type and amount of organic modifier in mobile phase on efficiency (n) and asymmetry factor (b/a) showed that, the appropriate conditions for a good separation were 35°c and 7% (v/v) butanol in mobile phase.  variations of selectivity factor versus butanol concentration, ...

Background and objectives: The use of herbal drugs in the treatment of many neurological disorders is gaining popularity in developing countries due to their fewer unwanted side effects, affordability and cultural acceptability. A mixture of three plants roots Calotropis procera (Asclepediaceae), Combretum micranthum (Combretaceae) and Ficus abutilifolia <...

___________________________________________________________________________________________ Abstract In this work, equations describing the effect of pH on the electrophoretic behaviour are used to investigate migration of a series of polyprotic amphoteric peptide hormones between pH 2 and 12 in polybrenecoated capillaries. Polybrene (hexadimethrin bromide) is a polymer composed of quaternary a...

We consider a simplified version of the kinetic model of simple reacting spheres (SRS) for a quaternary reactive mixture of hard-spheres in the dilute-gas limit. The model mimics a coloring process occurring with probability αR, described by the reversible chemical law A1 +A2 A3 +A4. We provide the linearized collisional operators of our model and investigate some of their mathematical properti...

abstract background: primary immunodeficiency diseases (pid) are heterogeneous group of inherited disorders mainly characterized by recurrent infections leading to several times hospital admissions. the economic impact of pid is a challenging issue; therefore, this study was designed to determine the medical costs of hospitalizations in this group of patients as an indicator of the direct cost ...

abstract background: in the past two decades psychoactive drugs especially among adolescents and youth are common, these drugs located in the second row of drug abuse in the world. present study performed with aim of determinant of predictors of psychoactive drugs use among adolescents and youth in kermanshah city based on theory of planned behavior. methods: this cross-sectional study was perf...

The title compound, potassium diniobium vanadium phospho-rus deca-sulfide, KNb(1.75)V(0.25)PS(10), was obtained by reaction of the elements with a eutectic mixture of KCl/LiCl. It is isostructural with the quaternary KNb(2)PS(10), but the Nb sites are occupied by statistically disordered Nb (87.5%) and V (12.5%) atoms. The structure is composed of anionic (∞) (1)[M(2)PS(10)](-) chains (M = Nb/V...