Ion-pairing is reported to improve the lipophilicity and subsequently the transport rate of polar drugs across lipid membranes. Lipophilisation of ionic drugs with high aqueous solubilities by ion-pair formation with appropriate counter-ion have proven to be promising for several applications. The aim of this review is to present the usefulness of ion-pair for improving the poor bioavailability...

Transportation of fly ash is a major problem in its efficient disposal. The main problem associated with fly ash transportation is that the particles settle down sooner than desired. The primary objective of this research is that not only the fly ash particles should remain floated till it reaches the end but also settle down after that. In this investigation the role of a drag-reducing cationi...

We propose a scheme for generating vibrational pair coherent states of the motion of an ion in a two-dimensional trap. In our scheme, the trapped ion is excited bichromatically by three laser beams along different directions in the X-Y plane of the ion trap. We show that if the initial vibrational state is given by a two-mode Fock state, the final steady state, indicated by the extinction of th...

Efficiency of a sequential ultrafiltration – ion exchange purification system was studied by testing separation of an anionic surfactant (SDBS) from aqueous solutions. Commercially available ultrafiltration membranes with cut-off values of 5, 10, and 30 kDa were used for the tests. The ion exchange processes were carried out on five types of ion-exchange resins – both macroporous and gel-based....

Human pulmonary surfactant proteolipid of Mr = 5,000, now termed surfactant protein C (SP-C), is produced by proteolytic processing of an Mr = 22,000 precursor. The active hydrophobic peptide imparts surface active properties to pulmonary surfactant phospholipids. We have determined the entire nucleotide sequence of two distinct genes encoding SP-C from a genomic library prepared from human leu...

A cloud point extraction process using the nonionic surfactant Triton X-114 to extracturanium from aqueous solutions was investigated. The method is based on the complexationreaction of uranium with Arsenazo III and micelle-mediated extraction of the complex. Theoptimal extraction and reaction conditions (e.g., pH, reagent concentration, effect of time) werestudied, and the analytical character...