A5015314016- Light effects on plants
- Plant responses to elevated CO2
- Plant Water Relations and Carbon Dynamics
- Photosynthetic Processes and Mechanisms
- Remote Sensing in Agriculture
- Polymer Nanocomposites and Properties
- Atmospheric Ozone and Climate
- Fuel Cells and Related Materials
- Polymer crystallization and properties
- Photoreceptor and optogenetics research
- Solar Radiation and Photovoltaics
- Meteorological Phenomena and Simulations
- Education, Psychology, and Social Research
- Conducting polymers and applications
- Impact of Light on Environment and Health
- Horticultural and Viticultural Research
- Plant Stress Responses and Tolerance
- Chemical Synthesis and Reactions
- Geophysics and Gravity Measurements
- Polymer Science and PVC
- Botany and Plant Ecology Studies
- Elasticity and Material Modeling
- Agricultural economics and policies
- Urban Heat Island Mitigation
- Advanced Physical and Chemical Molecular Interactions
University of Ostrava
2009-2024
Brno University of Technology
2020
Karlsruhe Institute of Technology
2012
Charles University
2007
Princeton University
1986
Polymer Institute Brno (Czechia)
1980-1981
Queen's University Belfast
1970-1972
McGill University
1972
Abstract Cloud cover increases the proportion of diffuse radiation reaching Earth's surface and affects many microclimatic factors such as temperature, vapour pressure deficit precipitation. We compared relative efficiencies canopy photosynthesis to direct photosynthetic photon flux density (PPFD) for a Norway spruce forest (25‐year‐old, leaf area index 11 m 2 −2 ) during two successive 7‐day periods in August. The comparison was based on response net ecosystem exchange (NEE) CO PPFD. NEE...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon Clustering and Viscoelastic Relaxation in Styrene-Based Ionomers. II. Effect of Ion ConcentrationA. Eisenberg M. NavratilCite this: Macromolecules 1973, 6, 4, 604–612Publication Date (Print):July 1, 1973Publication History Published online1 May 2002Published inissue 1 July 1973https://pubs.acs.org/doi/10.1021/ma60034a027https://doi.org/10.1021/ma60034a027research-articleACS PublicationsRequest reuse permissionsArticle...
Summary 1. Cloud cover affects carbon exchange between biota and the atmosphere. Recent studies have demonstrated that an increase in diffuse radiation fraction enhances photosynthetic efficiency of canopies. Although exact mechanism behind this effect is not clear, a more even distribution light among leaves across vertical profile canopy considered to be most important cause difference. 2. To test hypothesis, net ecosystem production (NEP) Norway spruce forest (30‐year‐old) was measured...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon Clustering and Viscoelastic Relaxation in Styrene-Based Ionomers. IV. X-Ray Dynamic Mechanical StudiesA. Eisenberg M. NavratilCite this: Macromolecules 1974, 7, 1, 90–94Publication Date (Print):January 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://doi.org/10.1021/ma60037a018RIGHTS & PERMISSIONSArticle Views214Altmetric-Citations63LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIon Clustering and Viscoelastic Relaxation in Styrene-Based Ionomers. III. Effect of Counterions, Carboxylic Groups, PlasticizersM. Navratil A. EisenbergCite this: Macromolecules 1974, 7, 1, 84–89Publication Date (Print):January 1974Publication History Published online1 May 2002Published inissue 1 January 1974https://pubs.acs.org/doi/10.1021/ma60037a017https://doi.org/10.1021/ma60037a017research-articleACS PublicationsRequest reuse...
This laboratory experiment tested the ability of spectral index called 'area under curve normalised to maximal band depth' (ANMB) track dynamic changes in xanthophyll cycle Norway spruce (Picea abies (L.) Karsten) needles. Four-year-old seedlings were gradually acclimated different photosynthetic photon flux densities (PPFDs) and air temperature regimes. The measurements conducted at end each acclimation period lasting for 11 days. A significant decline chlorophylls carotenoids ratio...
This study was designed to test the hypothesis that spectral composition of incident radiation, as defined by relative proportions blue (B; λmax = 455 nm) and red (R; 625 photons, can affect photosynthetic induction, since B photons stimulate stomatal opening are more effectively absorbed leaves than R photons. Different stages primarily determined photo-modulation Rubisco activity stomata opening, were investigated in dark-adapted Fagus sylvatica transferred saturating irradiance...
Abstract The 100 MHz spectra of polymers propene sulfide and propene‐2‐ d 1 have been determined in CDCl 3 , CCl 4 C 6 D . In the deuterated polymer main‐chain protons give rise to two overlapping AB quartets which pairs upfield B lines are coincident downfield A resolved. With CdCO as polymerization catalyst quartet is twice strong quartet. former ascribed an isotactic dyad: magnified image latter a syndiotactic Other catalysts (ZnCO CuCO SiO 2 /Al O Na) produce essentially atactic...
In molecular iodine, and most other gas-phase molecules as well, generation of a π/2 or π pulse is theoretically impossible. This result can be understood by analogy with microwave spectroscopy, since the rotational contribution to transition dipole moment an explicit function projection total angular momentum F = J + I along electric-field axis. The only solution phase-modulated pulses that inherently compensate for Rabi-frequency inhomogeneity. We present theoretical experimental evidence...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSecondary Relaxation Behavior in Ion-Containing PolymersA. Eisenberg, M. King, and NavratilCite this: Macromolecules 1973, 6, 5, 734–737Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Published inissue 1 September 1973https://pubs.acs.org/doi/10.1021/ma60035a017https://doi.org/10.1021/ma60035a017research-articleACS PublicationsRequest reuse permissionsArticle Views97Altmetric-Citations19LEARN ABOUT THESE...
Abstract 100 MHz spectra have been obtained for DMSO‐ d 6 solutions of poly(propene sulfone) made from propene (I), propene‐1,1,3,3,3‐ 5 (II), propene‐ cis ‐1,2‐ 2 (III) and propene‐2‐ 1 (IV) by copolymerization with sulfur dioxide; also oxidation poly‐(propene‐2‐ sulfide)s different tacticities. The following chemical shifts coupling constants were determined: τ A = 6.06, 6.12, 6.19; B 6.43, 6.51; C 6.05; CH3 8.44; J 6.5 Hz; AB 14.0 Hz. magnified image Both the protons are sensitive to...
Mechanical behavior of biological structures under dynamic loading generally depends on elastic as well viscous properties materials. The significance "viscous" parameters in real situations remains to be elucidated. Behavior rheological models consisting a combination inertial body and two Voigt's bodies were described mathematically with respect inverse problem solution, impulse harmonic loadings was analyzed. Samples walls porcine human aorta thoracica transverse direction samples bone...
Abstract This study deals with the impact of season, cloud cover, and air pollution on spectral regions incident solar radiation (UVB, UVA, photosynthetically active (PAR) = Blue + Green Red, 660, 730 nm) their ratios (Blue/Red, Blue/PAR, Green/PAR, Red/PAR, 660/730 nm, UVB/UVA, UVB/PAR, UVA/PAR) measured at three measuring stations two locations in City Ostrava, Czech Republic. The mentioned are crucial for plants because they influence photosynthesis photomorphogenesis. However, there is...
Abstract. A database containing 10 min means of solar irradiance measured on a horizontal plane in several ultraviolet and visible bands from July 2014 to December 2016 at three stations the area city Ostrava (Czech Republic) is presented. The contains time series average irradiances or photosynthetic photon flux densities following spectral bands: 280–315 nm (UVB); 315–380 (UVA); 400–700 (photosynthetically active radiation, PAR); 510–700 nm; 600–700 610–680 690–780 400–1100 nm....
Leaf optical properties (LOPs) determine the radiation regime of vegetation, thus being key input parameters in leaf and canopy radiative transfer models. It is great importance to know uncertainties originating from LOP measurements. The most common approach measure uses integrating spheres. They allow measurements both directional-hemispherical reflectance factor (R) transmittance (T). However, sphere's design, inner surface coating measurement protocol differ among spheres' models...