The regularities of chromatographic retention and separation enantioselectivity the selected β-blockers (propranolol, pindolol, alprenolol, atenolol, oxprenalol, metoprolol, clenbuterol, sotalol, pronethalol, salbutamol, labetalol) were studied with eight chiral stationary phases (CSPs) in polar ionic mode (PIM) elution system. A range novel CSPs was prepared by immobilisation macrocyclic glyco...

The mode-specific vibrational energy relaxation of the amide I' and amide II' modes in NMA-d(1)/(D(2)O)(n) (n = 0-3) clusters were studied using the time-dependent perturbation theory at the B3LYP/aug-cc-pvdz level. The amide modes were identified for each cluster based on the potential energy distribution of each mode. The vibrational population relaxation time constants were derived for the a...

In the interstellar medium, amide-type molecules play an important role in formation of prebiotic hot molecular cores or high-mass star-formation regions. The complex amide-related molecule cyanamide (NH $$_{2}$$ CN) is known as one rare which has a major urea CONH ). this paper, we presented detection rotational emission lines towards core G10.47 $$+$$ 0.03 between frequency range 158.49–160.1...

The mechanism of the vasodilator effect of procaine amide in dogs was investigated in isolated gracilis muscle and hindpaw perfused at constant flows with arterial blood. Inhibition of sympathetic ganglionic transmission contributed predominantly to the vasodilatation in muscle that accompanied intravenous administration of procaine amide (20 mg/kg). In contrast, comparable amounts of procaine ...

Infrared spectroscopy of biological cell monolayers grown on surfaces is a poorly developed field. This is unfortunate because these monolayers have potential as biological sensors. Here we have used infrared microscopy, in both transmission and transflection geometries, to study air-dried Vero cell monolayers. Using both methods allows one to distinguish sampling artefactual features from real...

Polymers of N-substituted glycines ("peptoids") containing chiral centers at the alpha position of their side chains can form stable structures in solution. We studied a prototypical peptoid, consisting of five para-substituted (S)-N-(1-phenylethyl)glycine residues, by NMR spectroscopy. Multiple configurational isomers were observed, but because of extensive signal overlap, only the major isome...

Effects of glucagon-like peptide-1 (GLP-1)(7-36)amide on fasted and fed motility in the rat small intestine were investigated in relation to its dependence on nitric oxide (NO), insulin, and somatostatin. Small bowel electromyography was performed using bipolar electrodes implanted 15, 25, and 35 cm distal to pylorus, and transit was studied with a radioactive marker. In the fasted state, GLP-1...

The rational design and synthesis of a highly potent inhibitor of HIV-1 protease have been accomplished. The inhibitor, SB 206343, is based on a model derived from the structure of the MVT-101/HIV-1 protease complex and contains a 4(5)-acylimidazole ring as an isosteric replacement for the P1'--P2' amide bond. It is a competitive inhibitor with an apparent inhibition constant of 0.6 nM at pH 6....