A new method for the determination of peak distribution across a two-dimensional separation space for the identification of optimal column combinations.

For the identification of the optimal column combinations, a comparative orthogonality study of single columns and columns coupled in series for the first dimension of a microscale two-dimensional liquid chromatographic approach was performed. In total, eight columns or column combinations were chosen. For the assessment of the optimal column combination, the orthogonality value as well as the peak distributions across the first and second dimension was used.

General pharmacology of the anxiolytic compound metaclazepam in comparison to other benzodiazepines.

7-Bromo-5-(2-chlorophenyl)-2,3-dihydro-2-(methoxymethyl)-1H-1,4- benzodiazepine X HCl (metaclazepam, KC-2547, Ka-2547, Talis) is a novel 1,4-benzodiazepine characterized by a high selectivity of its anxiolytic effects. The present experiments were performed to contribute to its general pharmacological profile and to evaluate possible risks especially on the cardiovascular field in comparison to standard benzodiazepines. The experiments were performed in guinea pig isolated ileal and papillary muscle preparations, anesthetized cats and dogs, conscious renal hypertensive (RHR) and pithed rats.

Evaluation of the effect of dopamine and other catecholamines on the electrocardiogram and blood pressure of rats by means of on-line biosignal processing.

We compared the effects of dopamine and other catecholamines under identical conditions on electrocardiograms (ECG), heart rate, and blood pressure of rats. The experiments were carried out on anesthetized male Wistar rats weighting 330-370 g. The ECG was taken by a bipolar ECG lead in the direction of the heart axis, mean arterial pressure was measured in the carotid artery.

[Studies on the parmacodynamic activity of several drug solvents. 3. 1,2-Propanediol, tetrahydrofurfuryl alcohol-polyethylene glycol ether (THFP), olyoxyethylene sorbitan monooleate (PSM)].

The drug solvents 1,2-propanediol, tetrahydrofurfuryl alcohol polyethylene glycolether (THFP, Tetraglycol), and polyoxyethylene sorbitan monooleate (PSM, Tween 80) were examined for their pharmacodynamic properties in the following tests: i.p. toxicity, "sign pattern", inclined screen test, balance rod test, and potentiation of hexobarbitone sleeping time in mice, spasmolytic activity in the guinea pig isolated ileum, and cardiovascular studies in anaesthetized rats, cats, and dogs including the i.

[Studies on the pharmacodynamic activity of several drug solvents. 2. Glycerin, N-(beta-hydroxyethyl)-lactamide, polyethylene glycol 400].

The drug solvents glycerin, N-(beta-hydroxyethyl)-lactamide, and polyethylene glycol 400 (Lutrol 9) were examined for their pharmacodynamic properties in the following tests: i.p. toxicity, "sign pattern", inclined screen test, balance rod test, and potentiation of hexobarbitone sleeping time in mice, spasmolytic activity in the guinea pig isolated ileum, and cardiovascular studies in anaesthetized rats, cats, and dogs including the i.

[Studies on the pharmacodynamic activity of several drug solvents. 1st communication: Diethyleneglycol monoethylether, N,N-diethylacetamide, dimethylsufoxide (author's transl)].

The drug solvents diethyleneglycol monoethylether (Transcutol), N,N-diethylacetamide, and dimethylsulfoxide were examined for their pharmacodynamic properties in the following tests: i.p. toxicity, "sign pattern", inclined screen test, balance rod test, and potentiation of hexobarbitone sleeping time in mice, spasmolytic activity in the guinea pig isolated ileum, and cardiovascular studies in anaesthetized rats, cats and dogs including the i.