No (505)
Number of found documents:
505
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TEMPERATURE INFLUENCE ON DESORPTION AND DETERMINATION OF BIOACCESSIBLE PAHS
Čvančarová, Monika; Pokorná, Lenka; Velebová, R.; Najmanová, P.; Cajthaml, Tomáš
2013 - English
Hydrophobic organic pollutants tend to adsorb onto soil particles which can cause a significant decrease in their bioaccessible fractions. Definition of the bioaccessibility is currently not unified; however it represents a part of total PAHs amount which is potentially available for biological processes. It is an important parameter which can be used for prediction of microbial degradation and environmental risk evaluation. This paper studies desorption behavior of PAHs at 20 and 60˚C. The desorption of PAHs from long-term contaminated soils was evaluated using resin Amberlite XAD- 2. A two-phase desorption model was used to calculate the desorption kinetic curves and F fractions which represent bioaccessible amount of PAHs. The results showed that the desorption of PAHs was significantly influenced by temperature. The greatest differences in the desorption behavior were observed at 5–6 ring PAHs. We compared the F fractions and the rate constants of individual PAHs which were determined at 20 and 60˚C. The results were also compared with sequential supercritical fluid extraction which has been already used for prediction of microbial degradation.
Keywords:
pahs
Available at various institutes of the ASCR
TEMPERATURE INFLUENCE ON DESORPTION AND DETERMINATION OF BIOACCESSIBLE PAHS
Hydrophobic organic pollutants tend to adsorb onto soil particles which can cause a significant decrease in their bioaccessible fractions. Definition of the bioaccessibility is currently not unified; ...
Cultivation of bacterial biomass with specific proteins in cell wall
Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek
2013 - Czech
Optimization of preparation of bacterial cultures for isolation of specific proteins Optimalizace přípravy bakteriálních kultur pro izolaci specifických proteinů
Keywords:
microbial production
Available at various institutes of the ASCR
Cultivation of bacterial biomass with specific proteins in cell wall
Optimization of preparation of bacterial cultures for isolation of specific proteins
Preparation of several types of ergot biomass
Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek
2013 - Czech
Technology of preparation of biomass of Claviceps purpurea, various types of ergot. Technologie přípravy biomasy Claviceps purpurea, různé druhy námelů.
Keywords:
ergot biomass production
Available at various institutes of the ASCR
Preparation of several types of ergot biomass
Technology of preparation of biomass of Claviceps purpurea, various types of ergot.
Development of production technology of bacterial polymers
Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek
2013 - Czech
Development and scale-up of technology of biopolymers' preparation. Usage in preparation of biodegradable plastics. Vývoj a scale up technologie přípravy biopolymerů. Využití pro přípravu biodegradovatelných plastů.
Keywords:
downstream processing; scale-up
Available at various institutes of the ASCR
Development of production technology of bacterial polymers
Development and scale-up of technology of biopolymers' preparation. Usage in preparation of biodegradable plastics.
Optimization of production of agricultural auxiliary fertilizers
Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek; Prell, Aleš
2013 - Czech
Development and scale-up of production technology of microbial auxiliary fertilizers for agricultural production. Vývoj a scale up technologie výroby mikrobiálních pomocných přípravků pro pěstování hospodářských rostlin.
Keywords:
auxiliary fertilizers
Available at various institutes of the ASCR
Optimization of production of agricultural auxiliary fertilizers
Development and scale-up of production technology of microbial auxiliary fertilizers for agricultural production.
Biotransformation of olefine
Marešová, Helena; Kyslíková, Eva; Kyslík, Pavel
2013 - Czech
Isolation and screening of soil microorganisms capable of biotransformation of olefines. Izolace a výběr půdních mikroorganismů schopných biotransformovat olefiny.
Keywords:
biotransformation; olefine; soil bacterium
Available at various institutes of the ASCR
Biotransformation of olefine
Isolation and screening of soil microorganisms capable of biotransformation of olefines.
ENDOCRINE DISUPTIVE CHEMICALS: MECHANISMS OF WHITE ROT FUNGI BIODEGRADATION
Cajthaml, Tomáš; Křesinová, Zdena; Čvančarová, Monika; Maternová, H.; Filipová, A.
2013 - English
The main aim of this study was to elucidate mechanisms involved in EE2 and other EDs compounds degradation by white rot fungi. Results showed simultaneous involvement of ligninolytic enzymes and cytochrome P-450 in biodegradation. The present results indicate the advantage of utilization of WRF cultures for organopollutants degradation.
Keywords:
biodegradation
Available at various institutes of the ASCR
ENDOCRINE DISUPTIVE CHEMICALS: MECHANISMS OF WHITE ROT FUNGI BIODEGRADATION
The main aim of this study was to elucidate mechanisms involved in EE2 and other EDs compounds degradation by white rot fungi. Results showed simultaneous involvement of ligninolytic enzymes and ...
A NOVEL BIOAUGMENTATION APPROACH IN BIODEGRADATION OF ORGANIC POLLUTANTS IN CONTAMINATED SOIL
Lhotský, O.; Filipová, Alena; Innemanová, P.; Velebová, R.; Cajthaml, Tomáš
2013 - English
Polycyclic aromatic hydrocarbons (PAHs) belong among organic compounds that accumulate in the environment mainly resulting from human activities. Because of their potentially negative effects on human health, methods of their removal from the environment are intensively studied. In this work, a biodegradation method of bioaugmentation based on sequential stepwise mixing of inoculated soil with non inoculated soil was used. The subject of this work was an application of a bacterial consortium on a real contaminated (7399 mg.kg-1 of PAHs) soil. 8 bacterial strains isolated from other contaminated sites were inoculated. DNA was isolated from the samples during the inoculation process and the degradation of PAHs was monitored after 4 months.
Keywords:
soil
Available at various institutes of the ASCR
A NOVEL BIOAUGMENTATION APPROACH IN BIODEGRADATION OF ORGANIC POLLUTANTS IN CONTAMINATED SOIL
Polycyclic aromatic hydrocarbons (PAHs) belong among organic compounds that accumulate in the environment mainly resulting from human activities. Because of their potentially negative effects on human ...
A method for determining the effect of osmotic stress on the physiological state of brewer´s yeast and the course of main fermentation
Sigler, Karel; Matoulková, D.; Kosař, K.
2012 - Czech
The methodology concerns a laboratory assay of the response of production strains of brewer´s yeast to high osmotic pressure common for the HGB (high gravity brewing) process. It is intended for brewery laboratories with good instrumental background, which are engaged in characterizing producrion strains and evaluating their suitability for use in new technologies. Application of the methodology extends the spectrum of methods used for the description of production yeast strains Metodika je určena pro laboratorní stanovení odpovědi provozních kmenů pivovarských kvasinek na osmotický stres při používání technologie HGB (high gravity brewing). Metodika je určena pro pivovarské laboratoře s dobrým instrumentálním zázemím, jejichž náplní je charakterizace provozních kmenů pivovarských kvasinek a posouzení jejich použitelnosti pro nové technologie. Aplikace metodiky rozšíří spektrum metod používaných k popisu produkčních kmenů kvasinek
Keywords:
Brewer´s yeast; HGB process; osmotic pressure
Available at various institutes of the ASCR
A method for determining the effect of osmotic stress on the physiological state of brewer´s yeast and the course of main fermentation
The methodology concerns a laboratory assay of the response of production strains of brewer´s yeast to high osmotic pressure common for the HGB (high gravity brewing) process. It is intended for ...
Bacterial biomass preparation
Prell, Aleš; Kujan, Petr; Sobotka, Miroslav; Šafář, Hynek
2012 - Czech
Optimization of preparation of bacterial cultures for isolation of specific proteins. Optimalizace přípravy bakteriáních kultur pro izolaci specifických proteinů a vývoj purifikační technologie.
Keywords:
microbial production; bacterial biomass
Available at various institutes of the ASCR
Bacterial biomass preparation
Optimization of preparation of bacterial cultures for isolation of specific proteins.
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