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Biomedical subjects

P Solich

Publications and source records attributed to P Solich.

23 records · Page 2Linked to original sources
PubMed1999

Flow-injection fluorimetric determination of 1,4-benzodiazepines in pharmaceutical formulations after acid hydrolysis.

A simple, rapid and fully automated flow injection method with fluorimetric detection after hydrolysis with H2SO4 in ethanolic or methanolic medium at room temperature has been developed for the determination of 1,4-benzodiazepines (oxazepam, diazepam and nitrazepam) in pharmaceutical formulations. The calibration curves are linear in the ranges (mg ml(-1)) of oxazepam (0.025-0.150), diazepam (0.010-0.125) and nitrazepam (0.010-0.150), with detection limits of 0.01, 0.005 and 0.005 mg ml(-1), respectively, and RSD (1% (n = 10). The measurement throughput is 60 h(-1) using a 200-microl sample volume obtained by the direct dissolution of formulations in alcohol.

Anti-Anxiety Agents↗
PubMed1997

[Phytotherapeutic aspects of diseases of the circulatory system. 6. Leuzea carthamoides (WILLD.) DC: the status of research and possible use of the taxon].

Leuzea carthamoides (WILLD.) DC., Asteraceae, has become an important taxon usable in human practice and animal production in recent years. Originally an endemic plant of southern Siberia, now it is widely grown not only in the Union of Independent States, once the original region of introduction, but also in central and eastern Europe. The principal constituents of the whole plant are ecdysteroids (5 beta-cholest-6-on-7-ene derivatives) and flavonoids. In addition, the aerial part contains sesquiterpenic lactones of the guajanolide type, and the roots contain polyines (on the thiophene base). The present paper comprehensively discusses the occurrence, content and biological activity of these substances, the preparations manufactured from the plant, their use in therapeutic practice, food manufacture and animal production in the world and the Czech Republic. The plant has certainly become a taxon with prospects in the Czech Republic, particularly as the source of 20-hydroxyecdysone, which is getting into the limelight in the world.

Animals↗
PubMed1995

Construction of a diflunisal ion sensor and its use in automated flow-injection methods for assay, content uniformity, and dissolution studies of formulations.

A diflunisal ion selective electrode of the PVC membrane type with an ion-exchanger consisting of the tetraheptylammonium-diflunisal ion pair is described. The sensor exhibits a rapid, near-Nernstian, selective response to diflunisal anion in the pH range 7-10, with a (batch) detection limit of 1 x 10(-5) M. The ion sensor was used as a flow detector in an automated flow-injection analyzer to develop routine methods for assays (concentration range 1-50 x 10(-4) M, (flow) detection limit 2.6 x 10(-5) M), content uniformity, and dissolution studies of diflunisal formulations. No serious interference from common ions and tablet excipients was found, and the drug can be directly determined in colored samples without separation steps. Fourty measurements can be performed automatically per hour with a precision of 0.5-1.8% relative standard deviation. The automated method for the dissolution test provides a complete dissolution profile by the end of the experiment. Using the constructed ion sensor, the intramolecular hydrogen bonding of the diflunisal anion was studied, thereby revealing a new application of ion sensor potentiometry.

Electrodes↗
PubMed1994

[CADISO (Cardiovascular Diseases and Stability of the Organism): 10 years of integrated research on natural substances at the Charles University Pharmacy School in Hradec Králové].

The research project CADISO (Cardiovascular Diseases and Stability of the Organism--Phytotherapeutical Possibilities) is an alliance board associating approximately 20 professional institutions, its centre and coordinating laboratory being the Department of Pharmaceutical Botany and Ecology, Faculty of Pharmacy, Charles University, Hradec Králové. It aims at the prevention (additives in food industry) and therapy of diseases of the circulatory apparatus using phytotherapeutic agents and substances isolated from higher plants and fungi. The project is divided into three systems of investigation: ADAPRETE, i.e. the substances increasing the nonspecific resistance of the organism (adaptogenes of plant origin, immunostimulants), DIACORD, dealing with the substances acting on the cardiovascular system in a mediated way, i.e. treating the diseases the eventual action of which alters the heart and vessels (antihypercholesterolemics, antihyperlipidemics, antidiabetics, anti-oxidants and quenchers of free radicals, hepatoprotectives, anti-aggregating agents), and CORCORAN studying the taxons and substances isolated from them which act directly on the circulatory system (cardiotonic, anti-arrhythmic and vasodilating agents). To achieve a real purpose of the project, the linking-up of the phytochemical, pharmacological-toxicological, pharmaceutical-technological fields, production of raw materials and legislation is ensured.

Cardiovascular Diseases↗