Butyl lactate is a green solvent produced from renewable materials through the reaction of ammonium with n-butanol. It could be source material for valuable products such as propylene glycol, acrylic acid, its derivatives, and cyclic monomer polylactic acid (PLA)—lactate. In this study, we present novel non-catalytic interactions n-butanol carried out in temperature range 130–170 °C closed syst...

Chopped wheat straw, containing increasing amounts of added water was treated with a constant level of ammonia (3.3 percent of straw dry matter) as ammonium hydroxide, and stored for I to 60 days before determing in vitro dry matter digestibility (IVD MD), nitrogen content and fiber-bound nitrogen (ADF-N) versus free ammonia nitrogen (NH3N) of the treated sample. The overall improvement (e.g., ...

A simple, specific and accurate reverse phase liquid chromatographic method was developed for the simultaneous determination of losartan potassium and ramipril in table dosage forms. A hypersil ODS C18, 4.6x250 mm, 5 mum column in isocratic mode, with mobile phase acetonitrile:methanol:10 mM tetra butyl ammonium hydrogen sulphate in water in the ratio of 30:30:40% v/v/v was used. The flow rate ...

A simple stability-indicating RP-HPLC method has been developed and validated for the determination of Racecadotril (RAC) in pharmaceutical dosage forms. The mobile phase consisting of methanol and tetra butyl ammonium hydrogen sulphate (80: 20, v/v) was used using isocratic elution with UV detection at 230 nm. The method showed good linearity for RAC in the 5-120 μg/mL range being the square o...

We report our results on nonlinear optical properties of 2(3), 9(10), 16(17), 23(24) tetra tert-butyl phthalocyanine and 2(3), 9(10), 16(17), 23(24) tetra tert-butyl Zinc phthalocyanine studied using Z-scan technique with 800 nm femtosecond and 532 nm nanosecond pulses. Nonlinear absorption behavior in both femtosecond and nanosecond domains was studied in detail. We observed three-photon absor...

In the title compound, (C(6)H(20)N(4))(2)[Ge(2)S(6)], the dimeric [Ge(2)S(6)](4-) anion is formed by two edge-sharing GeS(4) tetra-hedral units. The average terminal and bridging Ge-S bond lengths are 2.158 (14) and 2.276 (6) Å, respectively. The anions and the diprotonated ammonium cations are organized into a three-dimensional network by N-H⋯S and N-H⋯N hydrogen bonds.

The title compound, [Zr(C(5)H(5))(2)(C(4)H(9)N)(C(5)H(5)N)], was obtained from the reaction of (C(5)H(5))(2)Zr(py)(η(2)-Me(3)SiC(2)SiMe(3)) (py is pyridine) and (t)BuN=C=N(t)Bu alongside the formation of (C(5)H(5))(2)Zr(CN(t)Bu)(η(2)-Me(3)SiC(2)SiMe(3)). The zirconium atom is coordinated in a distorted tetra-hedral geometry by two cyclo-penta-dienyl ligands, a pyridine ligand, and a tert-butyl-...

A series of 3-alkyl(aryl)-4-[3-(2-metylbenzoxy)-4-methoxybenzylideneamino]-4,5-dihydro-1H-1,2,4-triazol-5-ones (1-9) were titrated potentiometrically with tetrabutylammonium hydroxide in four non-aqueous solvents such as isopropyl alcohol, tert-butyl acetonitrile and N,N-dimethylformamide (DMF), graphs drawn for all cases. The half-neutralization potential values the corresponding pKa determine...

Introduction A comprehensive review of gas-chromatographic methods for determining the concentration of circulating antiepileptic drug has been presented (1 ). Because most epileptic patients receive one or more drugs to control their seizures, it is therapeutically desirable to have a method for monitoring the concentrations of each of these drugs in serum. The chemistry of pyrolysis with meth...