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Strategie rozvoje společnosti VINOK s.r.o.
Kučera, Radim
The bachelor thesis describes the strategic analysis of VINOK s.r.o. company using analysis methods of internal and external factors. Selected key factors are used for creating strategic proposals, one of the proposals is described in detail.
Development of HPLC method for evaluation of tryptophan metabolites
Pšenčíková, Barbora ; Kastner, Petr (advisor) ; Kučera, Radim (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Barbora Pšenčíková Supervisor: PharmDr. Petr Kastner, Ph.D. Title of thesis: Development of HPLC method for evaluation of tryptophan metabolites The essential amino acid tryptophan is a precursor of several important bioactive compounds. In recent years it was found out that tryptophan metabolites are involved in the pathogenesis of many diseases, including neurodegenerative and psychiatric disorders, autoimmune diseases, or cancer. Therefore, the analytical methods for simultaneous determination of tryptophan and its metabolites are highly required. The purpose of this diploma thesis was to develop an optimal HPLC method for determination of tryptophan and its metabolites (kynurenine, kynurenic acid, serotonin and 5-hydroxyindole-3-acetic acid) and to consider all the possible options of determination of quinolinic acid and melatonin. The chromatographic separation was carried out by Supelco Ascentis Express F5 column, 2.7 μm particle size, 15 cm × 3 mm, using spectrophotometric and fluorescence detection. Parameters of detection were for kynurenine UV detection 369 nm, 254 nm, fluorescence detection Ex/Em: 369/475; for kynurenic acid UV detection 244 nm; for...
LC-HRMS analysis of selected drugs in biological material I.
Tomanová, Jana ; Kučera, Radim (advisor) ; Váňová, Nela (referee)
Charles Univesity, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Jana Tomanová Supervisor: doc. PharmDr. Radim Kučera, Ph.D. Consultant: PharmDr. Vít Šesták, Ph.D. Title of the Diploma Thesis: LC-HRMS analysis of selected drugs in biological material I. High performance liquid chromatography is one of the most widespread separation analytical techniques. It is used in various medical, pharmaceutical and industrial laboratories. It uses different affinities of the substances in the analysed mixture to the mobile and stationary phases. Mass spectrometry is one of the instrumental techniques by which charged particles are separated in the gas phase based on the mass- to-charge ratio. Nowadays, great emphasis is placed on the fact that the individual analytical methods which are being developed are subsequently validated according to a guideline issued by national or international authorities. Validation is a process that verifies that a method is suitable for its intended use. In this thesis, the conditions for the determination of warfarin in patient's serum by means of mass spectrometer with LTQ XL linear ion trap were optimized and validated. The optimization of the method was based on the already developed and validated...
The use of HPLC in the field of chiral separations V.
Burda, Jakub ; Kučera, Radim (advisor) ; Kastner, Petr (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department: Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Jakub Burda Supervisor: doc. PharmDr. Radim Kučera, Ph.D. Title of Thesis: The employment of HPLC in the field of chiral separations V. Continuously growing requirements of regulatory authorities for the quality and safety of medicines put a high pressure on manufacturers. Last decades are marked by optically pure drugs, whose developement goes hand in hand with developement of chiral syntheses and separations. The most used method in the field of separations are direct separations using chiral stationary phases. The most often used carrier for these stationary phases is silica, which may contain metal impurities on its surface, negatively impacting separation process. The focus of this thesis was testing of influuence of chromatographic conditions on chiral and achiral interactions of seven selected analytes with stationary phase. Column with native β-cyclodextrin as chiral selector was used for the testing. 1
The reduction of the nitro group using a platinum catalyst in a flow reactor
Galčan, Gabriel ; Kučera, Radim (advisor) ; Miletín, Miroslav (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis The reduction of the nitro group using a platinum catalyst in a flow reactor Diploma thesis Candidate: Gabriel Galčan Supervisor: doc. PharmDr. Radim Kučera, Ph.D. Consultant: PharmDr. Tomáš Holas, Ph.D. Flow chemistry is a relatively new solution in the production of pharmaceutical materials. This thesis is dealing with the reduction of a nitro group on an aromatic nucleus for production of the new cytostatic agent using a flow reactor. The reaction is in progress using a platinum catalyst and hydrogen, which is generated by the electrolysis of distilled water. The theoretical part is mainly concentrated on the overview of flow systems, presents important variables for the course of the reaction in the flow, and there is also the digression to the flow chemistry. The next object of attention is the use of flow reactors in the context of green chemistry, but also the future of flow systems and their limits. The practical part contains information about the construction and setting options of the flow reactor together with data about the reaction scheme and all critical impurities. Very good results were achieved with a mixture of solvents dichlormethane and methanol under...
The development of new methods of ultra-high performance supercritical fluid chromatography for pharmaceutical applications
Plachká, Kateřina ; Nováková, Lucie (advisor) ; Kučera, Radim (referee) ; Novák, Ondřej (referee)
Charles University, Faculty of Pharmacy in Hradec Králové Department of Analytical Chemistry Candidate: Mgr. Kateřina Plachká Supervisor: prof. Pharm.Dr. Lucie Nováková, Ph.D. Title of Doctoral Thesis: The development of new methods of ultra-high performance supercritical fluid chromatography for pharmaceutical applications A compilation of seven articles and three book chapters dealing with the applicability of supercritical fluid chromatography (SFC) methods in the field of pharmaceutical analysis is presented in this dissertation thesis. The first part focuses on pharmaceutical quality control and especially impurity control. The presented articles are dealing with the searching for generic screening approach for the development of SFC methods and with the subsequent optimization and validation of these methods. The screening conditions were compared based on developed mathematical model. The generic combination of diol stationary phase and 0.1 % ammonium hydroxide in methanol as modifier of CO2-based mobile phase was proposed as a starting point for SFC method development based on the obtained results. Several challenges were described during optimization of UHPSFC methods and their solution was proposed. The benefits of acetonitrile added to the modifier, advantages of column coupling and the...
Non-silica based materials in drug analysis IV.
Ženíšková, Tereza ; Kučera, Radim (advisor) ; Pilařová, Pavla (referee)
Non-silica based materials in drug analysis IV. Diploma thesis Tereza Ženíšková Charles University, Faculty of Pharmacy in Hradec Králové, Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Heyrovského 1203, Hradec Králové. Sample preparation is an important step before the analysis itself. It enables removal of the ballast components, which could interfere with an analyte or even disable the analysis. Solid phase extraction (SPE) belongs among the most popular sample preparation techniques. Silica is the most often used sorbent for SPE, however new, more durable sorbents with different selectivity have appeared. This thesis focuses on employment of zirconium dioxide and its ability to retain analytes having Lewis base character via ligand exchange. We tested to use zirconium dioxide in extraction of indomethacin as a Lewis base from suppositories. The influence of conditioning solvents with different polarity and extractions solvents was investigated. 10% acetonitrile in methylene chloride was found to be the best solvent for conditioning of zirconia. Methanolic ammonia solution was used as eluent. After some experiments the concentration and the volume of the eluent was set at 0.25M NH3 in MeOH and 3 mL. Diclofenac was used as the internal standard. The recovery for sorbent after...
Optimization of separation conditions for HPCCC of paclitaxel
Havrlantová, Šárka ; Kučera, Radim (advisor) ; Šatínský, Dalibor (referee)
Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Šárka Havrlantová Supervisor: doc. PharmDr. Radim Kučera, Ph.D. Name of diploma thesis: Optimization of separation conditions for HPCCC of paclitaxel The aim of this work is a feasibility study of natural substances isolation (in my case it is paclitaxel and its intermediate 10-deacetylbaccatin) using modern technique called High performance countercurrent chromatography (HPCCC) available in Teva in Opava. For this basic research it was necessary to study the literature and test various solvent systems. Chosen solvent systems were then tested together with natural substance in HPCCC, results were processed and discussed. Countercurrent chromatography is considered a modern separation technique based on two immiscible liquids. One of them is called a stationary phase and is held inside the column by centrifugal force, the second liquid is called a mobile phase and is pumped through the column. Then the injected liquid sample is also pumped through the column and depending on distribution coefficients the sample components are either held in the stationary phase or pass through the column and detector into fraction collector. Advantages of this method are e.g. total...
Bioanalytical Evaluation of New Acetylcholinesterase Inhibitors
Mžik, Martin ; Palička, Vladimír (advisor) ; Kučera, Radim (referee)
6 SUMMARY Bioanalytical evaluation plays a pivotal role in preclinical research of new drugs, particularly in investigation of their pharmacokinetics and metabolism. Use of modern analytical approaches is indispensable; chromatography and mass spectrometry are the techniques of choice in this area of research. To obtain reliable data, the analytical methods must be validated. Several authorities - such as European Medicines Agency or Food and Drug Administration - have published recommendations on bioanalytical method validation. In its theoretical part, this dissertation deals with description of Alzheimer's dementia with special focus on treatment strategies. Further attention is paid to topics that are directly related to the experimental work - liquid chromatography, mass spectrometry, sample preparation, method validation and pharmacokinetics. The experimental part - a commentary on the author's published articles - consists of three units: I. bioanalytical evaluation of PC-37 and PC-48 - novel 7-methoxytacrine and donepezil-derived dual cholinesterase inhibitors, II. study of the transport of donepezil across the blood-brain barrier with focus on its structure and substructures and III. bioanalytical evaluation of S-K1025 and S-K1026 - new 7-methoxytacrine and tryptophan-derived dual cholinesterase...
LC-HRMS analysis of selected antihypertensive drugs in biological material for compliance assessment
Tláskalová, Anna ; Kučera, Radim (advisor) ; Štěrbová, Petra (referee)
5 ABSTRACT Charles University Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Chemistry and Pharmaceutical Analysis Candidate: Anna Tláskalová Supervisor - specialist: Mgr. Martin Mžik Supervisor: doc. PharmDr. Radim Kučera, Ph.D. Title: LC-HRMS analysis of selected antihypertensive drugs in biological material for compliance assessment About 40 % of Czech population between the ages of 25 and 64 suffer from arterial hypertension. Although an array of effective antihypertensives is available nowadays, optimal blood pressure during treatment is reached by mere 30 % of the patients. This is mainly due to the patients' poor adherence to the treatment, who use their medicaments incorrectly or not at all. The adherence of a patient to the treatment, as well as pharmacokinetics, represent the most significant source of variability of the answer to the treatment and notably influences its outcome. The monitoring of plasmatic levels of antihypertensives is one of the methods of modern medicine which enables both an effective supervision of the incorrectly compensated patients, and the adjustment of dosage scheme. This diploma thesis focuses on development and optimisation of extraction procedures for selected antihypertensives (amiloride, amlodipine, betaxolol, bisoprolol, carvedilol, celiprolol,...

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See also: similar author names
1 KUČERA, Richard
5 Kučera, Radek
3 Kučera, Roman
2 Kučera, Rudolf
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