Search results for: Petr Stastny

Items from 1 to 7 out of 7 results

article

The Efficacy and Safety of Lower-Limb Plyometric Training in Older Adults: A Systematic Review

Tomas Vetrovsky, Michal Steffl, Petr Stastny, James J. Tufano

Sports Medicine > 2019 > 49 > 1 > 113-131

Background The aging process is associated with a progressive decline of neuromuscular function, increased risk of falls and fractures, impaired functional performance, and loss of independence. Plyometric training may mitigate or even reverse such age-related deterioration; however, little research on the effects of plyometric exercises has been performed in older adults. Objective The objective...

article

Remarkably enhanced density and specific activity of active sites in Al-rich Cu-, Fe- and Co-beta zeolites for selective catalytic reduction of NOx

Petr Sazama, Radim Pilar, Lukasz Mokrzycki, Alena Vondrova, more

Applied Catalysis B: Environmental > 2016 > 189 > C > 65-74

The efficiency of catalysts for abatement of emissions of nitrogen oxides (NO_x) from stationary and especially mobile sources using selective catalytic reduction (SCR) is obviously still not sufficient to meet increasingly more stringent environmental limits. We demonstrate that the conversion of NO_x to nitrogen under the relevant conditions of the SCR-NO_x can be dramatically increased using Al-rich...

article

The Gluteus Medius Vs. Thigh Muscles Strength Ratio and Their Relation to Electromyography Amplitude During a Farmer’s Walk Exercise

Petr Stastny, Michal Lehnert, Amr Zaatar, Zdenek Svoboda, more

Journal of Human Kinetics > 2015 > 45 > 1 > 157-165

The strength ratio between hamstrings and quadriceps (H/Q) is associated with knee injuries as well as hip abductor muscle (HAB) weakness. Sixteen resistance trained men (age, 32.5 ± 4.2 years) performed 5 s maximal isometric contractions at 75° of knee flexion/extension and 15° of hip abduction on a dynamometer. After this isometric test they performed a Farmer´s walk exercise to find out if the...

article

Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites

Petr Sazama, Blanka Wichterlová, Štěpán Sklenák, Vasile I. Parvulescu, more

Journal of Catalysis > 2014 > 318 > C > 22-33

Al-rich template-free BEA^* zeolite (Si/Al 4.6) was synthesized and its structure was analyzed in comparison with the conventional H-BEA^* zeolite of Si/Al 11.3 using XRD, N₂ sorption, SEM, FTIR, ²⁷Al 3Q and ²⁹Si MAS NMR spectroscopy, and DFT calculation of the deprotonation energies. The Al-rich H-BEA^* exhibited a high concentration of Brønsted and Lewis sites, both of high acid strength, although...

article

Tailoring of the structure of Fe-cationic species in Fe-ZSM-5 by distribution of Al atoms in the framework for N2O decomposition and NH3-SCR-NOx

Petr Sazama, Blanka Wichterlová, Edyta Tábor, Petr Šťastný, more

Journal of Catalysis > 2014 > 312 > Complete > 123-138

The heterogeneity and redox behavior of Fe-cationic species in Fe-ZSM-5 catalysts for N ₂ O decomposition and NH ₃ -SCR-NO _x were analyzed by Mössbauer and UV–Vis spectroscopy, TPR-H ₂ , and reaction kinetic measurements. Iron was introduced into ZSM-5 zeolites of similar Si/Al but with different populations of close (Al–Si–Si–Al sequences in one ring – Al pairs) and...

article

Tailoring of Fe-ferrierite for N2O decomposition: On the decisive role of framework Al distribution for catalytic activity of Fe species in Fe-ferrierite

Zdenek Sobalik, Jana Novakova, Jiri Dedecek, Naveen K. Sathu, more

Microporous and Mesoporous Materials > 2011 > 146 > 1-3 > 172-183

Two parent ferrierites with similar Si/Al ratio (8.5 and 10.5), a commercial and a laboratory specimen with different distribution of Al atoms in the framework, were used for the preparation of model Fe-ferrierite catalysts for N ₂ O decomposition. As proven by UV–Vis analysis of the fully exchanged Co(II)-ferrierites, the two ferrierites differ in the distribution of framework Al between...

article

The role of macroligands in regioselective hydrogenation of cinnamaldehyde

Petr Kluson, Petr Stastny, Hana Luskova, and Libor Cerveny

Reaction Kinetics, Mechanisms and Catalysis > 2005 > 86 > 1 > 109-118

SummaryAttention has been paid to the role of a macroligand in the regioselective catalytic hydrogenation of cinnamaldehyde. The macroligands tested were of ordered, regular structures and also served as catalytic supports (natural graphite, plankton based silica, latex templated titania). The active part - ruthenium - was, besides the macroligands, supported also on active charcoal and high surface...

Filter options

Publication date

Set your own date range

INFONA - science communication portal

Search results for: Petr Stastny

The Efficacy and Safety of Lower-Limb Plyometric Training in Older Adults: A Systematic Review

Remarkably enhanced density and specific activity of active sites in Al-rich Cu-, Fe- and Co-beta zeolites for selective catalytic reduction of NOx

The Gluteus Medius Vs. Thigh Muscles Strength Ratio and Their Relation to Electromyography Amplitude During a Farmer’s Walk Exercise

Acid and redox activity of template-free Al-rich H-BEA* and Fe-BEA* zeolites

Tailoring of the structure of Fe-cationic species in Fe-ZSM-5 by distribution of Al atoms in the framework for N2O decomposition and NH3-SCR-NOx

Tailoring of Fe-ferrierite for N2O decomposition: On the decisive role of framework Al distribution for catalytic activity of Fe species in Fe-ferrierite

The role of macroligands in regioselective hydrogenation of cinnamaldehyde

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options