138 research outputs found
The Life and Work of Jiří Hejda
No full textThe bachelor's thesis deals with the life and work of Jiří Hejda. The first part is devoted to the life of Jiří Hejda itself. The main sources were the author's autobiography, available archive materials and historical studies. In the second part of the thesis, articles that were published in 1931 in the journal České slovo are analyzed. The articles from the section Výroba a obchod (Production and trade), for which was Jiří Hejda responsible, are of main interest. The main topics of his contributions are divided into six basic groups, which are described in more detail. At the end of the chapter, Hejda's opinions are summarized and compared with contemporary economic thought. The third chapter is focused on individual economic publications. Subchapters devoted to the publications include description of the individual pieces of work. Most represented are the works that were published by Česká národohospodářská společnost during the period of the first Czechoslovak republic. The fourth part deals with the literary work of Jiří Hejda. Besides the economic studies, Jiří Hejda wrote an autobiography and was also an author of crowns of sonnets, novels and stories. Jiří Hejda thought up a large portion of his work during the time spent in prison and wrote it only after he was released in the sixties...
Do species differ in their ability to coexist with the dominant alien Lupinus polyphyllus? : A comparison between two distinct invaded ranges and a native range
No full textThe community-level impacts of invasive plants are likely to vary depending on the character of native species of the target communities and their ability to thrive within the stands of the dominant alien invader. Therefore, I examined the response of native species richness to the cover of the dominant alien Lupinus polyphyllus in two distinct invaded ranges: Czech Republic (Central Europe) and New Zealand. I compared the relation between native species richness and the cover of the dominant alien L. polyphyllus with that in its native range, Pacific Northwest, USA. In the native range, I found no response of native species richness to the cover of L. polyphyllus. In the Czech Republic (central Europe), the richness of native species related to it negativelly, but the relation was only marginally significant. Contrary to that, the richness of species native to New Zealand related to the cover of L. polyphyllus strongly negatively and the negative relation was significantly stronger than that of species native to Europe. Of the two invaded ranges, species native to New Zealand have been documented to be much more vulnerable to the conditions associated with the invasion and dominance of L. polyphyllus, compared to species native to central Europe. This principle has been shown both across these two invaded ranges and in New Zealand, where the aliens of european origin successfully coexist with the dominant invasive alien L. polyphyllus. Similarly, species in the native range of L. polyphyllus showed no relation to its cover, indicating their ability to thrive even in dense stands of this dominant species
The Life and Work of Jiří Hejda
No full textThe bachelor's thesis deals with the life and work of Jiří Hejda. The first part is devoted to the life of Jiří Hejda itself. The main sources were the author's autobiography, available archive materials and historical studies. In the second part of the thesis, articles that were published in 1931 in the journal České slovo are analyzed. The articles from the section Výroba a obchod (Production and trade), for which was Jiří Hejda responsible, are of main interest. The main topics of his contributions are divided into six basic groups, which are described in more detail. At the end of the chapter, Hejda's opinions are summarized and compared with contemporary economic thought. The third chapter is focused on individual economic publications. Subchapters devoted to the publications include description of the individual pieces of work. Most represented are the works that were published by Česká národohospodářská společnost during the period of the first Czechoslovak republic. The fourth part deals with the literary work of Jiří Hejda. Besides the economic studies, Jiří Hejda wrote an autobiography and was also an author of crowns of sonnets, novels and stories. Jiří Hejda thought up a large portion of his work during the time spent in prison and wrote it only after he was released in the sixties...
Addition and Redox Processes at Intramolecularly N-Coordinated Boranes: a Route to Hitherto Unknown B-N and N-B-N Heterocyclic Systems
No full textTato disertační práce je zaměřena na studium přípravy a popis struktury a reaktivity dosud neznámých neutrálních či anionických systémů obsahujících fragment B-N či N-B-N uvnitř k benzenu či pyrrolu annulovaného pětičlenného kruhu, tj. deriváty 1H-2,1-benzazaborolu a 1H-pyrrolo[1,2-c][1,3,2 diazaborolidinu. Pro jejich přípravu byl kromě jiného využit již dříve popsaný mechanizmus adice silných nukleofilů na donorovou imino C=N vazbu výchozích intramolekulárně N-koordinovaných chloroboranů.This doctoral thesis deals with preparation and description of molecular structures and reactivity of yet unknown neutral and anionic heterocyclic systems containing B-N or N-B-N moiety within to benzene or pyrrole annulated five-membered ring, i.e. derivatives of 1H-2,1-benzazaborole and 1H-pyrrolo[1,2-c][1,3,2] diazaborolidine. Among other mechanisms a previously described nucleophilic addition of strong nucleophiles to the activated imino C=N bond in the structure of starting intramolecularly N-coordinated chloroboranes was utilized.Fakulta chemicko-technologickáDne 13. 9. 2017 Ing. Martin Hejda zdárně přednesl obhajobu své disertační práce na téma Adiční a redoxní děje na intramolekulárně N-koordinovaných boranech: cesta k novým B-N a N-B-N heterocyklických systémů před komisí. Bylo přítomno 7 z 8 čelnů komise, prof. Ing. Antonín Lyčka, DrSc. se omluvil. Vyčerpávajícím způsobem poté Ing. Martin Hejda zodpověděl všechny dotazy oponentů z jejich oponentských posudků a také dotazy kladené přítomnými členy komise při diskuzi:
prof. Ing. Zdeněk Černošek, CSc.
Jaký je typ pásů a pološířky pásů v EPR spektrech radikálových sloučenin? Neprojevuje se v EPR spektrech interakce s ?-elektrony aromatických kruhů? Jak lze vysvětlit rozdílnosti ve vysokoenergetických částech UV/Vis spekter jednotlivých sloučenin? Jak víte, že při zahřívání sloučenin typu "BisBAB" vznikají radikálové sloučeniny, když tyto radikály nebylo možné v EPR spektrometru detekovat?
prof. Ing. Aleš Růžička, Ph.D.
Zkoušeli jste změnit rozpouštědlo při reakci MeLi se sloučeninou 11? Jak by tuto reakci ovlivnilo použití nekoordinujícího rozpouštědla? Zkoušeli jste redukovat sloučeniny 11 a 12 kovy alkalických zemin nebo lanthanoidy? Jak perzistentní jsou radikálové "BAB" sloučeniny? Lze použít i vyšší vlnovou délku záření než 256 nm pro štěpení sloučenin typu "BisBAB"?
prof. RNDr. Milan Pour, Ph.D.
Lze sloučeniny 13, 14 a 15 transmetalovat?
prof. Ing. Roman Jambor, Ph.D.
Jak lze chápat Vaše označení "velmi, velmi komplikovaný průběh" reakce MeLi se sloučeninou 11?
doc. Ing. Milan Erben, Ph.D.
Okomentujte prosím UV/Vis absorpční spektra sloučenin 11, 12, 16, 17, 22 a 23 a jak lze vysvětlit náznak možné flourescence těchto sloučenin? Jak se projevuje na vzhledu NMR spekter prodloužení jednoduché vazby C-C u sloučenin typu "BisBAB"?
Z porovnání mezi předloženou disertační prací a předloženými publikacemi vyplývá zjevná souvislost mezi těmito dokumenty.
Ing. Martin Hejda má zásadní podíl na předložených publikacích.Dokončená práce s úspěšnou obhajobo
Naturalized alien flora of Uzbekistan: species richness, origin and habitats
No full textThis is the first study providing an up-to-date account of the alien flora in Uzbekistan and
analyzing the relationship between the invasion status (casual, naturalized, invasive) of alien plants in this country and their life histories, regions of origin, and habitat affiliations. The data were collected from literature, herbaria, and field surveys. The check-list includes 252 species, of which 44 are invasive (17.5%), 177 naturalized non-invasive (70.2%, giving
220 naturalized species in total), and 31 casual aliens (12.3%). The family with the highest number of alien species is Asteraceae (53, or 21% of all recorded species), followed by Brassicaceae (21), Poaceae (19), and Solanaceae (15). The most represented genera in the alien flora of Uzbekistan are Amaranthus (8 species), Centaurea, Malva, Solanum, and Vicia (5 each). The majority of the alien flora of Uzbekistan are annuals (138 species, i.e., 57% of the total), followed by perennials (52 species, 21.5%). There are only 13 alien woody species recorded. Invasive species originating from Africa, temperate Asia, and Europe are over-represented, as are naturalized species native to Northern America and Southern America. The majority of species are affiliated with agricultural (204 species) and ruderal habitats (164 species); riparian habitats (68 species) and grasslands (38 species) are also well represented. The pattern of invasions in the country is determined by the interaction of source species pools arriving from native regions, their habitat affiliations, and land use. Our study provides the first step toward science-based management of plant invasions in Uzbekistan. It can support policymakers, authorities, and managers in mitigating the current and future impacts of alien species
The prison poetry of Jan Zahradníček, Václav Renč and Jiří Hejda
No full textThe topic of the bachelor's thesis is the interpretation and comparison of the prison poetry of Jan Zahradníček, Václav Renč, and Jiří Hejda, who were imprisoned at the turn of the 1940s and 1950s and subsequently released years later after having been granted an amnesty. The purpose of the thesis is the analysis of the poetry that these authors had composed and learned by heart while imprisoned, and which was published after their release. The author of the thesis will focus his attention on the most significant and frequent motifs in each work and on their subsequent comparison
Supplementary material 1 from: Hejda M (2013) Do species differ in their ability to coexist with the dominant alien Lupinus polyphyllus? A comparison between two distinct invaded ranges and a native range. NeoBiota 17: 39-55. https://doi.org/10.3897/neobiota.17.4317
No full textEntry data for the univariate models with species richness as a response variable. (doi: 10.3897/neobiota.17.4317.app1) File format: Micrisoft Excell document (xls).
Internal Regulations, Organizational Rules and Instructions of the Employer with regard to their Validity and Enforceability
No full textTato bakalářská práce se zabývá vnitřními předpisy, organizačními řády a pokyny zaměstnavatele, a to především jejich platností a vymahatelností. Práce je rozdělena do tří částí. V první části autor analyzuje teoretické závěry odborné literatury a relevantní legislativy. V druhé části autor aplikuje jednotlivá východiska z první části při zkoumání reálných vnitřních předpisů, organizačních řádů a pokynů zaměstnavatelů a shrnuje tyto závěry v uceleném komentáři k těmto otázkám. Třetí, praktická, část je souhrnem závěrů autorovy analýzy teoretických východisek aplikovaných na existující vnitřní předpisy, organizační řády a pokyny zaměstnavatele, zobrazených v tabulce, jejímž smyslem je přehledně shrnout závěry této práce ve formě, která může přinést každému čtenáři užitečné informace pro jeho pracovní život.This bachelor thesis deals with the internal regulations, organizational rules and instructions of the employer with regard to their validity and enforceability. The bachelor thesis is divided into three parts. The author analyzes the theoretical conclusions of professional literature and relevant legislation in the first part. The author applies the individual conclusions of the first part while examining the real internal regulations, organizational rules and intstructions of the employer and summarizes these conclusions in a comprehensive commentary on these issues in the second part. The third, practical part is a summary of the conclusions of the author's analysis of the theoretical backgrounds applied to the existing internal regulations, organizational rules and instructions of the employer, which are presented in a table, the purpose of which is to summarize the conclusions of this work in a form that can provide readers with useful information for their working life
What is the impact of Impatiens parviflora on diversity and composition of herbal layer communities of temperate forests?
No full textThe aim was to estimate the impacts of invasive Impatiens parviflora on forests' herbal layer communities. A replicated Before-After-Control-Impact field experiment and comparisons with adjacent uninvaded plots were used. The alien's impact on species richness was tested using hierarchical generalized mixed effect models with Poisson error structure. Impact on species composition was tested using multivariate models (DCA, CCA, RDA) and Monte-Carlo permutation tests. Removal plots did not differ in native species richness from neither invaded nor adjacent uninvaded plots, both when the treatment's main effect or its interaction with sampling time was tested (Chi(2) = 0.4757, DF = 2, p = 0.7883; Chi(2) = 7.229, DF = 8, p = 0.5121 respectively). On the contrary, ordination models revealed differences in the development of plots following the treatments (p = 0.034) with the invaded plots differing from the adjacent uninvaded (p = 0.002). Impatiens parviflora is highly unlikely to impact native species richness of invaded communities, which may be associated with its limited ability to create a dense canopy, a modest root system or the fact the I. parviflora does not represent a novel and distinctive dominant to the invaded communities. Concerning its potential impacts on species composition, the presence of native clonal species (Athyrium filix-femina, Dryopteris filix-mas, Fragaria moschata, Luzula luzuloides, Poa nemoralis) on the adjacent uninvaded plots likely makes them different from the invaded plots. However, these competitive and strong species are more likely to prevent the invasion of I. parviflora on the adjacent uninvaded plots rather than being themselves eliminated from the invaded communities
Kształtowanie tożsamości regionalnej mieszkańców Podkarpacia – zarys problematyki
No full textThe article contains terminological findings regarding regional identity. The author explains what the formation of regional identity consists in. It discusses selected elements of the cultural identification of the Podkarpacie region, which cognition may form the basis of regional education
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