The objective of this study was to determine the effect of povidone. hydroxypropyl methylcellulose, hydroxypropyl cellulose, lactose and magnesium stearate on the stability of quinapril hydrochloride. The applied HPLC method was validated by the following parameters: selectivity, precision, linearity and accuracy. Binary 1:4 mixtures of quinapril hydrochloride and selected excipients were stabl...

We report the synthesis of stearate functionalized nanobubbles of SiO2 with a few aniline molecules inside, represented as C6H5NH2@SiO2@stearate, exhibiting fluorescence with red-shifted emission. Stearic acid functionalization allows the materials to be handled just as free molecules, for dissolution, precipitation, storage etc. The methodology adopted involves adsorption of aniline on the sur...

The effects of magnesium stearate (MgSt) and shear stress on flow properties and hydrophobicity are not well known. Blends with different concentrations of magnesium stearate and varying amounts of shear were tested using three different procedures: the FT4 Rheometer test, a tap density analyzer, and the Washburn method, to better understand the relation of lubricant concentration, amount of sh...

1Global Energy Systems, Department of Earth Sciences, Uppsala University, Villavägen 16, 752 36 Uppsala, Sweden 2Moscow School of Economics, Moscow State University, Moscow, Russia 3Faculty of Economics, Higher School of Economics, Moscow, Russia 4The International College of Economics and Finance, Higher School of Economics, Moscow, Russia 5Post Peak Living, San Francisco, CA, USA 6Management ...

The macrocyclic ligands 2,3,5,6-Bis{3’-bromo-5’-tert-butyl benzo-5-phenyl benzo} 12C3 (L1), 2,3,5,6-bis{3’-bromo-5’-tert butyl-benzo-5’-phenyl-benzo}15C4 (L2), 2,3,5,6-bis{3’-bromo-5’-tert butyl-benzo-5’-phenyl-benzo}18C5 (L3) have been synthesized and their alkaline metal compounds with NaClO4∙H2O and KClO4  have ...

The reactive intermediate generated by the addition of tert-butyl and 1,1,3,3-tetramethyl butyl isocyanide and cyclohexyl isocyanide to dialkyl acetylenedicarboxylate was trapped by 3-hydroxy pyridine to produce highly functionalized 4H-chromenes in fairly good  yields