Jiří Váňa

ORCID: 0000-0003-4756-7314
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About
Contact & Profiles
Research Areas
  • Bryophyte Studies and Records
  • Botany and Plant Ecology Studies
  • Lichen and fungal ecology
  • Catalytic C–H Functionalization Methods
  • X-ray Diffraction in Crystallography
  • Crystallization and Solubility Studies
  • Synthesis and Reactivity of Sulfur-Containing Compounds
  • Catalytic Cross-Coupling Reactions
  • Radical Photochemical Reactions
  • Asymmetric Hydrogenation and Catalysis
  • Plant Pathogens and Fungal Diseases
  • Luminescence and Fluorescent Materials
  • Plant Diversity and Evolution
  • Plant and Fungal Species Descriptions
  • Collembola Taxonomy and Ecology Studies
  • Cyclopropane Reaction Mechanisms
  • Chemical Reaction Mechanisms
  • Chemical Synthesis and Analysis
  • Synthesis of heterocyclic compounds
  • Peatlands and Wetlands Ecology
  • Advanced biosensing and bioanalysis techniques
  • Electrochemical Analysis and Applications
  • Organic Light-Emitting Diodes Research
  • Oxidative Organic Chemistry Reactions
  • Advanced Photocatalysis Techniques

University of Pardubice
2014-2025

Charles University
2009-2018

University of New York in Prague
2011

Czech Academy of Sciences
1981

A working checklist of accepted taxa worldwide is vital in achieving the goal developing an online flora all known plants by 2020 as part Global Strategy for Plant Conservation. We here present first-ever liverworts (Marchantiophyta) and hornworts (Anthocerotophyta) that includes 7486 species 398 genera representing 92 families from two phyla. The has far reaching implications applications, including providing a valuable tool taxonomists systematists, analyzing phytogeographic diversity...

10.3897/phytokeys.59.6261 article EN cc-by PhytoKeys 2016-01-29

This is the first report of Anastrophyllum michauxii from Vologda Region.It a montane subcircumpolar liverwort species.The species known in several European countries (Austria, Bulgaria, France, Czech Republic and Slovakia, Germany, Hungary, former Yugoslavia, Italy, Romania, Poland, Finland, Sweden, Norway), Asia (China, Japan) few sites North America (Damsholt, 2002;Schumacker & Va ´n ˇa, 2005).In Russia, A. has been found mountainous areas: Northern Middle Urals, Caucasus, Stanovoye...

10.1179/1743282012y.0000000030 article EN Journal of Bryology 2012-12-01

The gold(I)-mediated reaction between an internal alkyne and methanol proceeds by a dual activation mechanism, which directly results in formation of gem-diaurated intermediates. Reaction intermediates were investigated IR multiphoton dissociation spectroscopy, kinetics NMR the mechanism DFT calculations.

10.1002/anie.201204003 article EN Angewandte Chemie International Edition 2012-07-10

2008b) showed, with molecular and morphological evidence, that B. mildeanum is a distinct species.In Serbia, it was recorded for the first time in region of Jastrebac Mountains (Central Serbia).It occurred damp, wet crevices phyllosilicate rock where water seeps from stream above.The population rather small, but well developed.The rocks were exposed nearly vertical, surrounded by beech forest, free vascular plant cover.B. has scattered distribution Europe, Central, SW, SE Asia, N Africa...

10.1179/1743282013y.0000000064 article EN Journal of Bryology 2013-09-01

In this study, we evaluate the impact of fossil assignments and different models calibration on divergence time estimates carried out as Bayesian analyses. Estimated ages from preceding studies liverwort inclusions Baltic amber are used constraints a molecular phylogeny Cephaloziineae (Jungermanniopsida) obtained sequences two chloroplast coding regions: rbcL psbA. total, comparison 12 analyses demonstrates that an increased reliability chronograms is linked to number fossils assigned...

10.1007/s00606-012-0745-y article EN cc-by Plant Systematics and Evolution 2013-01-11

Finding optimal reaction conditions is usually complex, requires many experiments, and therefore demanding in terms of human, financial, environmental resources. This work provides a simple workflow for easier design popular palladium-catalyzed C–H functionalization reactions, where the active palladium catalysts contain carboxylate ligands. The key factor optimizing to find balance between two opposing effects carboxylic acid mixture: generation more reactive catalyst versus deactivation...

10.1021/acs.joc.9b00462 article EN The Journal of Organic Chemistry 2019-03-29

New to Kenya.Although differing much in appearance, induced by habitat, the leaf structure both gatherings is identical.The first specimen similar appearance isotype seen, from W. slope of Mt Muhavura, Uganda, Hedberg 2166 (BM).Noticeable, but not shown Potier de la Varde's (1955) figure, a single marginal row small, isodiametric cells near commencement basal expansion leaf, above as well isotype.3. Barbula pachyloma Broth.

10.1179/jbr.2010.32.4.311 article EN Journal of Bryology 2010-12-01

1. Anthoceros punctatus L.Contributors: B. Cykowska and F. MogroBolivia: Dept. Tarija, Prov. Arce, near Reserva de Fauna Tariquia reserve, next to the road from Sidras Camberi, 22°12′09·7″S, 64°...

10.1179/1743282013y.0000000085 article EN Journal of Bryology 2014-02-23
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