Počet nalezených dokumentů: 309
Publikováno od do

Development of recombinant Pichia pastoris strain expressing synthetic gene of npga by genetic cloning
Marešová, Helena; Maršálek, Jaroslav; Bečka, Stanislav; Kyslík, Pavel
2012 - anglický
Cloning of synthetic npga gene into Pichia pastoris. Development of high expression system for penicillin acylase in a stirred bioreactor. Isolation and characterization of the enzyme. Klíčová slova: penicillin acylase; heterologous expression; stirred bioreactor Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Development of recombinant Pichia pastoris strain expressing synthetic gene of npga by genetic cloning

Cloning of synthetic npga gene into Pichia pastoris. Development of high expression system for penicillin acylase in a stirred bioreactor. Isolation and characterization of the enzyme.

Marešová, Helena; Maršálek, Jaroslav; Bečka, Stanislav; Kyslík, Pavel
Mikrobiologický ústav, 2012

Microalgae Chlorella sp. as an Alternative Source of Fermentable Sugars
Maršálková, B.; Širmerová, M.; Kuřec, M.; Brányik, T.; Brányiková, Irena; Melzoch, K.; Zachleder, Vilém
2010 - anglický
The aim of this work was to optimize the enzymatic hydrolysis of starch originating from microalgae (34.0 +/- 1.2% wt. starch in the dry algal biomass) grown on flue gas from waste incineration plant and to study the influence cell disintegration method on the yield of hydrolysis. Apart from the starch, the possibility of cellulose usage from microalgae cell wall as a further source of fermentable sugars was studied and preliminary results are presented. Klíčová slova: Flue-gas; Biofuels; Photobioredactor Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Microalgae Chlorella sp. as an Alternative Source of Fermentable Sugars

The aim of this work was to optimize the enzymatic hydrolysis of starch originating from microalgae (34.0 +/- 1.2% wt. starch in the dry algal biomass) grown on flue gas from waste incineration plant ...

Maršálková, B.; Širmerová, M.; Kuřec, M.; Brányik, T.; Brányiková, Irena; Melzoch, K.; Zachleder, Vilém
Mikrobiologický ústav, 2010

Litter decomposition in a primary succession chronosequence on brown coal mine deposits
Urbanová, Michaela; Valášková, Vendula; Šnajdr, Jaroslav; Baldrian, Petr
2009 - anglický
Litter decomposition in a primary succession chronosequence on brown coal mine deposits varies along with the successional age of the site Klíčová slova: soil; enzyme; succesion Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Litter decomposition in a primary succession chronosequence on brown coal mine deposits

Litter decomposition in a primary succession chronosequence on brown coal mine deposits varies along with the successional age of the site

Urbanová, Michaela; Valášková, Vendula; Šnajdr, Jaroslav; Baldrian, Petr
Mikrobiologický ústav, 2009

Fungal community and enzyme activities in topsoil layers of Quercus petraea forest: how important is the seasonality?
Voříšková, Jana; Valášková, Vendula; Baldrian, Petr
2009 - anglický
The analysis of fungal community composition and enzyme activities in topsoil layers of a Quercus petraea forest show that seasonality is an important factor affecting community composition Klíčová slova: soil; enzyme; litter Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Fungal community and enzyme activities in topsoil layers of Quercus petraea forest: how important is the seasonality?

The analysis of fungal community composition and enzyme activities in topsoil layers of a Quercus petraea forest show that seasonality is an important factor affecting community composition

Voříšková, Jana; Valášková, Vendula; Baldrian, Petr
Mikrobiologický ústav, 2009

Production of Enzymes by Fungal Colonies in Soils: A Laboratory Study
Šnajdr, Jaroslav; Popelářová, Petra; Baadri, S.; Alawi, A.; Boddy, L.; Baldrian, Petr
2009 - anglický
Production of enzymes by fungal colonies in soils is affected by mycelium age and the presence or absence of interspecific mycelial interactions Klíčová slova: soil; enzyme; interaction Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Production of Enzymes by Fungal Colonies in Soils: A Laboratory Study

Production of enzymes by fungal colonies in soils is affected by mycelium age and the presence or absence of interspecific mycelial interactions

Šnajdr, Jaroslav; Popelářová, Petra; Baadri, S.; Alawi, A.; Boddy, L.; Baldrian, Petr
Mikrobiologický ústav, 2009

Degradation of lignin and humic substances in forest soil by saprotrophic basidiomycetes
Šnajdr, Jaroslav; Steffen, K. T.; Hofrichter, M.; Baldrian, Petr
2009 - anglický
The work deals of degradation of lignin and humic substances in forest soil by saprotrophic basidiomycetes is significant, yet species-dependent Klíčová slova: soil; enzyme; interaction Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Degradation of lignin and humic substances in forest soil by saprotrophic basidiomycetes

The work deals of degradation of lignin and humic substances in forest soil by saprotrophic basidiomycetes is significant, yet species-dependent

Šnajdr, Jaroslav; Steffen, K. T.; Hofrichter, M.; Baldrian, Petr
Mikrobiologický ústav, 2009

SILVER NANOPARTICLES AND THEIR BACTERICIDAL EFFECT
Piksová, K.; Weiserová, Marie; Jedličková, A.; Fojtík, A.
2009 - anglický
Rapid development of bio-nanotechnology lead to the new way in the combating of bacteria and to searching specific properties of nanomaterials The study of bactericidal nanomaterials is particularly timely considering the recent increase of new resistant strains of bacteria to the most potent antibiotics The present work studies the bactericidal effect of silver nanoparticles in the range of 10-30 nm on Gram-negative bacteria and Gram-positive bacteria Klíčová slova: silver nanoparticles; bactericidal effect Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
SILVER NANOPARTICLES AND THEIR BACTERICIDAL EFFECT

Rapid development of bio-nanotechnology lead to the new way in the combating of bacteria and to searching specific properties of nanomaterials The study of bactericidal nanomaterials is particularly ...

Piksová, K.; Weiserová, Marie; Jedličková, A.; Fojtík, A.
Mikrobiologický ústav, 2009

Comparison of in vitro tests for measurement of estrogenity of chlorinated compounds and their use in the evaluation of biodegradation of chlorbenzoates by the fungus Panus tigrinus
Svobodová, Kateřina; Covino, S.; Křesinová, Zdena; Cajthaml, Tomáš
2009 - anglický
Recently, contamination of the environment by endocrine disruptive compounds, toxicity of these chemicals and their biodegradability are widely studied. This work is focused on estrogenity of chlorinated phenols and chlorbenzoic acids that represent potential degradation products of PCB compounds. Two different yeast bioassays for evaluation of estrogenity based on recombinated strains of Saccharomyces cerevisie were compared in this work. Estrogenic activity of chlorbenzoic acids varied with the chemical structure of chemicals. A mixture of chlorbenzoates (initial concentration 10 ppm) was degraded by a ligninolytic fungus Panus tigrinus in liquid cultures. Chemicals resulting from degradation were tested for their estrogenity, however, results indicated that the test responses were inhibited probably by some compounds present in the fungal culture liquid Klíčová slova: yeast assay; biodegradation; chlorbenzoates Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Comparison of in vitro tests for measurement of estrogenity of chlorinated compounds and their use in the evaluation of biodegradation of chlorbenzoates by the fungus Panus tigrinus

Recently, contamination of the environment by endocrine disruptive compounds, toxicity of these chemicals and their biodegradability are widely studied. This work is focused on estrogenity of ...

Svobodová, Kateřina; Covino, S.; Křesinová, Zdena; Cajthaml, Tomáš
Mikrobiologický ústav, 2009

Enzyme-catalysed processes in the spoil heaps after brown coal mining: effects of site age, vegetation and seasonality
Baldrian, Petr; Šnajdr, Jaroslav; Valášková, Vendula; Urbanová, Michaela; Voříšková, Jana; Popelářová, Petra; Herinková, Jana; Cajthaml, Tomáš; Frouz, Jan
2009 - anglický
Enzyme-catalysed processes in the spoil heaps after brown coal mining are affected by site age, vegetation composition and seasonality Klíčová slova: soil; enzyme; succesion Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Enzyme-catalysed processes in the spoil heaps after brown coal mining: effects of site age, vegetation and seasonality

Enzyme-catalysed processes in the spoil heaps after brown coal mining are affected by site age, vegetation composition and seasonality

Baldrian, Petr; Šnajdr, Jaroslav; Valášková, Vendula; Urbanová, Michaela; Voříšková, Jana; Popelářová, Petra; Herinková, Jana; Cajthaml, Tomáš; Frouz, Jan
Mikrobiologický ústav, 2009

Microalgae as a feedstock for production of bioethanol
Doucha, Jiří; Lívanský, Karel; Doušková, Irena; Zachleder, Vilém
2008 - anglický
Many countries are actively developing biofuels program. Leading in this field is Brazil whose present need of gasoline is supplied with 30 % by ethanol produced relatively cheaply from sugarcane. In developed countries bioethanol (3-5 % of present gasoline need) is produced mostly from corn (USA) or wheat (EU). However, ethanol production from cereals is expensive. Promising feedstock are microalgae. Some of them can surpass yields of classical crop 10-15 times. Technology of growth of unicellular Chlorella in very thin layer on inclined areas is compared with the technology of world-wide mode of cultivation in open ponds. It was found, that due to higher yields and lower energy needs, the cost of biomass production in thin-layer bioractores is only 20 % compared with ponds Mnoho zemí aktivně vyvíjí program produkce biopaliv. Vedoucí postavení má v tomto směru Brazílie, kde současnou spotřebu benzínu ze 30 % pokrývá etanol vyráběný relativně levně z cukrové třtiny. Ve vyspělých zemích se bioetanol (3-5 % současné spotřeby benzínu) vyrábí především z kukuřice (USA) nebo z pšenice (EU). Nicméně produkce etanolu z obilnin je drahá. Slibnou surovinu představují mikroskopické řasy. Některé mohou překročit výtěžky zemědělských plodin 10–15 krát. Technologie růstu jednobuněčných řas v tenké vrstvě na nakloněných rovinách je porovnána se světově rozšířeným způsobem kultivace v otevřených bazénech. Bylo zjištěno, že díky vyšším výtěžkům a nižší spotřebě energie, jsou náklady na výrobu biomasy v tenkovrstvých reaktorech pouze 20 % v porovnání s otevřenými bazény Klíčová slova: biomass; microalgae; bioethanol Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Microalgae as a feedstock for production of bioethanol

Many countries are actively developing biofuels program. Leading in this field is Brazil whose present need of gasoline is supplied with 30 % by ethanol produced relatively cheaply from sugarcane. In ...

Doucha, Jiří; Lívanský, Karel; Doušková, Irena; Zachleder, Vilém
Mikrobiologický ústav, 2008

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