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	29Si NMR Phenylsilane Polymer Analysis Pinkas, Jiří ; Blechta, Vratislav ; Karban, Jindřich ; Sýkora, Jan Here we focus on the analysis od dehydrocoupling polymerization reactions of phenylsilane. the molar mass distribution depends on the catalytic system and can be easily monitored by on-flow LC-NMR experiment. Fulltext: PDF Detailed record
	Effect of Conditions of Supercritical Fluid Extraction on Insecticidal Activity of Isolates from Rue Sajfrtová, Marie ; Pavela, R. ; Karban, Jindřich The aim of this study was to find optimal operating conditions of SFE from rue to obtain extract with maximal insecticidal activity. Several types of extracts were prepared using the benefit of variable solvent power of supercritical carbon dioxide. The extracts rich in volatile oil or oleoresin were obtained at 40 °C and 12 or 28 MPa, respectively. The extract enriched with polar components was extracted at pressure of 28 MPa and temperature of 40 °C with acetone added to CO2 as modifier (2.5 – 10 wt. %). Fulltext: PDF Detailed record
	Comparison of PM2.5 and PM10 Concentrations and Chemical Composition at Suchdol and Košetice Sites Schwarz, Jaroslav ; Karban, Jindřich ; Chalupníčková, E. ; Pokorný, R. ; Novák, J. ; Smolík, Jiří Fulltext: PDF Detailed record
	Effect of Support on Activity of Transition Metal Sulfides in Hydrogenation of 1-Methylcyclohexene Parallel with Hydrodesulfurization of 1-Benzothiophene Kaluža, Luděk ; Sýkora, Jan ; Karban, Jindřich ; Žáček, Petr ; Vít, Zdeněk ; Zdražil, Miroslav Detailed record
	Colloidal Silica as an Efficient Binder for the Preparation of Al-SBA-15 Pellets Topka, Pavel ; Karban, Jindřich ; Soukup, Karel ; Jirátová, Květa ; Šolcová, Olga The objective of this contribution was to examine the possibility of using colloidal silica as a binder for the preparation of extrudates or pellets from mesoporous molecular sieves. Al- SBA-15 pellets with different content of colloidal silica were prepared and their textural properties and mechanical stability were investigated. The catalytic activity of the pellets in Friedel-Crafts alkylation of toluene with benzyl alcohol was directly compared to that of binder-free pellets and powder catalyst. Detailed record
	Supercritical Fluid Extraction and Insecticidal Activity of Lamiaceae Plants Sajfrtová, Marie ; Pavela, R. ; Karban, Jindřich ; Sovová, Helena Natural insecticides based on bioactive extracts from plants represent a new trend in plant protection. Supercritical extraction (SFE) using CO2 is a modern extraction technique able to isolate high-added value compounds from plant without any thermal degradation, which allows to obtain extracts with high biological activity. In this work, insecticidal activity of SFE extracts from plant of mint family (Lamiaceae) has been studied and compared to activity of isolates obtained by conventional extraction techniques (hydrodistillation, organic solvent extraction). As a result of variation in extraction pressure, three types of extract were obtained: extract rich in volatile compounds (at 12 MPa), extract rich in oleoresins (at 28 MPa) and in polar compounds (5% of acetone used as modifier). Chemical composition and biological activity (LD50, antifeedant activity) of all isolates were evaluated and compared. Detailed record
	Utilization of Tandem Cycloisomerization Leading to Helicen-like Molecules Storch, Jan ; Karban, Jindřich ; Sýkora, Jan Detailed record
	Utilization of Supercritical Fluid Extraction for Botanical Insecticide Isolation Sajfrtová, Marie ; Sovová, Helena ; Karban, Jindřich ; Pavela, R. The aim of this study was to compare the insecticidal activity of extracts obtained by SFE and traditional extraction methods from 20 plants. Three types of extracts were prepared using the benefit of variable solvent power of supercritical carbon dioxide. The extracts rich in essential oil or oleoresin were obtained at 50 °C and 12 or 28 MPa, respectively. The extract enriched with polar components was extracted at pressure of 28 MPa with ethanol added to CO2 as modifier. Essential oils were isolated from the herbs by hydrodistillation and oleoresins were obtained using Soxhlet extraction with liquid solvents. The biological activity of extracts was measured on different kinds of insect by means of contact toxicity test (LD50, LD90) and antifeedant activity. The insecticidal activity of the SFE products was compared with conventional extracts. Detailed record
	Hodnocení texturních, mechanických a katalytických vlastností pelet Al-SBA-15 s nízkým obsahem křemičitanového pojiva Topka, Pavel ; Karban, Jindřich ; Soukup, Karel ; Šolcová, Olga This contribution deals with evaluation on textural, mechanical, and catalytic properties of Al-SBA-15 pellets with low content of silica binder. Detailed record
	Report for the Project Optimization of Supercritical Fluid Extraction for Maximal Yield of Biologically Active Substances from Plants Sovová, Helena ; Sajfrtová, Marie ; Pavela, R. ; Karban, Jindřich ; Bárnet, M. Savory, caraway, peppermint, lavander and ruta were selected out of more than twenty plants as the best resources of biologically active substances soluble in supercritical CO2 and effective against pest insect. Lethal doses and antifeedant activity of plant extracts against four model insect species were evaluated. Chemical composition of isolates was determined using GC and GC-MS. Two novel methods were used to examine relation between the composition and the acute toxicity of isolates. Detailed record

See also: similar author names
1	Karban, Jan
2	Karban, Jaroslav
1	Karban, Jiří

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