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Preliminary investigation of antimicrobial activity of St. John's Wort
(Medical University Faculty of Pharmacia, 1998)
Preliminary investigations of Hypericum perforatum have shown that one of the most important activities of the plant is its antibacterial activity. The most active component of the acetonic extract has been isolated through ...
Modeling of drawing thin glass sheet from a preform / Model izvlačenja tankih staklenih traka iz predoblika
(Serbian Chemical Society, 1998)
A one-dimensional model of thin glass sheet drawing has been developed. This model includes momentum, heat and mass balance equations. The density, viscosity and specific heat of the glass were calculated as functions of ...
New substituted 2-methylthiomethyl- and 2-methylsulphinylmethylenebenz- imidazoles with D 2 /5-HT(1A) activity
(Govi-Verlag Pharmazeutischer Verlag GmbH, 1998)
Several 2-methylthiomethylbenzimidazoles (3a-e) and the corresponding sulphinyl derivatives 4a-e were synthesized and evaluated measuring their in vitro binding affinity at the D 1 and D 2 dopamine (source: synaptosomal ...
Synthesis and dopaminergic features of six novel 3-arylpiperidines
(Bollettino Chimico Farmaceutico, 1998)
Four substituted 3-aryl-1-{2-[5-(1H-benzimidazole)]ethyl}piperidines and two 3-aryl-1-{2-[6-(1,4-dihydroxyquinoxaline-2,3-dione)]ethyl} piperidines were synthesized, characterized and evaluated for in vitro binding affinity ...
Oxidation products of hyperforin from Hypericum perforatum
(Elsevier, 1998)
The isolation of two oxidation products of hyperforin from the aerial parts of Hypericum perforatum and their structure determination by means of 2D NMR methods is reported. The products had the same 1-(2-methyl-1- ...
An improved approach to B-norsteroids: An one-pot preparation of 3β-acetoxy-5-oxo-5,6-seco-cholestan-6-oic and 3β-acetoxy-5,17-dioxo-5,6-seco-androstan-6-oic acids
(Serbian Chemical Society, 1998)
A simple one-put procedure for the synthesis of the 5,6-seco-steroidal acids 9a,b in described in this paper. It consists of the epoxidation of the ▲ 5 -steroids, i.e., cholesteryl acetate (8a) and 17-oxo-aandrost-5-en-3β-yl ...
Essential oil of anthemis montana
(Taylor & Francis, 1998)
The essential oil of Anthemis montana L. (Asteraceae) has been analyzed using GC and GC/MS. Forty-two components were identified. The major fractions belonged to α-thujone (46.9%), β-thujone (16.0%), and trans-chrysanthemyl ...
Sesquiterpene lactones from Centaurea species: C. derventana and C. kosaninii
(Georg Thieme Verlag, 1998)
Oxygen reduction on a duplex stainless steel
(Oxford : Pergamon-Elsevier Science Ltd, 1998)
O-2 reduction on duplex stainless steel was investigated in neutral and alkaline solutions with and without the presence of chloride ions. All polarization curves showed hysteresis with higher reaction rate in positive ...
Hydrogen evolution at Zn-Ni alloys
(Pergamon-Elsevier Science Ltd, Oxford, 1998)
Zn-Ni alloys were electrodeposited from a berate-citrate and TEPA bath in potentiostatic and galvanostatic regimes. Potential of electrodeposition or current density were varied and chemical composition and phase structure ...