|
|
Dynamika půdního stavu během vegetačního období
Trnka, Tomáš
The bachelor thesis focuses on the dynamics of the soil condition of the land during growing season. The object of the study was a cambium in the cadastral area of Šeborov (district Žďár nad Sázavou). In this work we assessed selected soil properties. The stability of soil aggregates, bulk density, porosity, maximum capillary water capacity, minimum air capacity, soil moisture, soil reactions and organic carbon content were evaluated. The stability of soil aggregates showed statistically significant differences, as did moisture. The agroecological limits were not exceeded for bulk density or porosity during the entire vegetation period. Maximum capillary capacity values ranged from 20 % to 30 % during the growing season. The values of the minimum air capacity exceeded a satisfactory value of 15–20 % for almost the entire vegetation period. The active soil reaction was evaluated in the range for weakly acidic soil and the exchange soil reaction for acidic soil.
|
|
| |
|
|
Comparing the feelings of participants in the intensive course of the Feldenkrais method in 2014 and 2016
Trnka, Tomáš ; Vařeková, Jitka (advisor) ; Strnad, Pavel (referee)
Title: Comparing the feelings of participants in the intensive course of the Feldenkrais method in 2014 and 2016 Background: The Moshé Feldenkrais exercise system - Awareness Through Movement (ATM) uses slow, conscious movements to support motor learning. Exercise not only improves motor patterns, but also improves other body functions, including the psyche. However, there are few research papers that examined the effects on larger scope. Objectives: The aim of the research was to compare the subjective feelings of participants of the intensive ATM courses organized annually at the Faculty of Physical Education and Sport of Charles University in 2014 and 2016. Methods: In order to achieve the aim of the research, quantitative qualitative comparison of the results of the questionnaire survey from two three-day courses of the Feldenkrais method in 2014 and 2016 was used. The structure of the questionnaires was based on the basic demographic data of the participants, their motivation to take part in the course and the subjective evaluation of the course (benefit from exercise, reduction of pain etc.). Likert scale was used to subjectively evaluate the course (exercise enjoyment, pain reduction, etc.). Results: In 2014, 121 participants attended the ATM course and 99 completed questionnaires were...
|
|
| |
|
|
Staudinger reaction of azides derived from levoglucosan.
Mitrovský, Ondřej ; Trnka, Tomáš (advisor) ; Řezanka, Michal (referee)
This bachelor thesis is focused on research of reactivity of azido derivatives of levoglucosan with triphenylphosphine and tris(pyrrolidine)phosphine. The ultimate goal of this thesis was preparation of until now unpublished phosphazenes to make them available for practical utilization. Two of them were successfully prepared in crystallic form. Better results were with 2- or 4-azido derivatives of levoglucosan. In general reactivity of anhydro derivatives with azido group at C-3 were substantially lower, moreover the product mostly failed to crystallize.
|
|
|
Organocatalytic asymmetric synthesis of various organic compounds from α,β-unsaturated aledyhes
Kamlar, Martin ; Veselý, Jan (advisor) ; Trnka, Tomáš (referee)
With regard to a fast development in the field of fluoroorganic chemisty, the intention of this diploma thesis is focused to utilize of organocatalysis by secondary amines as catalysts for preparation enantiomerically pure compounds containing fluorine atom in its structure. The preparation of these subsances is realized by way of nucleofilic addition to α,β- unsaturated aldehydes using suitable fluorine containing nuclephilic agent 1-(fluoronitromethylsulphonyl)benzene, to get appropriate 1,4-adduct.
|
|
|
Study of porphyrins substituted wich glycosylated steroids
Zelenka, Karel ; Trnka, Tomáš (advisor) ; Jindřich, Jindřich (referee) ; Kefurt, Karel (referee) ; Pouzar, Vladimir (referee)
I I 4. Conclusions This work is focused on syntheses of new zeso-substituted porphyrins containing glycosylated-steroid moieties and study oftheir physico-chemical and supramolecular propertres. In the first part oť this work, procedure for the synthesis of B glycosides 4 or 5 is described. No ťormation of ortohoesters was observed. Next part of this work consists oť searching for suitable protecting group for a saccharide part oť molecule and preparation of steroidaldehydes.Protectedglycosides10, ll,tó, 17,|9a+l9band20wereprepared.Suitable method for preparation ofaldehydes 14, 15, 23,24,29,30 an.34 is described (chapter 3.1). Following part of work describes preparation of porphyrins with protected sugar moiety. Symmetrical Al type porphyrins 35-41 were prepared. Also preparatio n of trans-A2ts1 ýpe porphyrins 43, 44 and A]B type 45, 4ó is described. Preparation oť porphyrins 47.50 with deprotected hydroxyl groups is described (Chapter 3.2). Solvent driven aggregation behavior oť the porphyrins was studied in aqueous solvent mixtures' Formation of aggregates of porphyrin 45 was proved using uv-vis spectroscopy (Chapter 3.3). Considering use oť prepared porphyrins in electrochemistry as a possible electrochemical sensors, polarographic and voltametric studies oť porphyrins 47-19 were per|ormed and showed...
|
|
| |
|
|
Preparation of organocatalysts derived from monosaccharides
Nekvinda, Jan ; Veselý, Jan (advisor) ; Trnka, Tomáš (referee)
This bachelor thesis is focused on the synthesis of organocatalysts derived from monosaccharides, in particular D-glucose and D-glucosamine, with various protecting groups. Synthesis of various thiourea catalysts and the attempt to prepare new squaramide catalysts is described. ABSTRAKT Tato bakalářská práce je zaměřena na syntézu organokatalyzátorů odvozených od monosacharidů, zejména z D-glukózy a D-glukosaminu, s různými chránícími skupinami. Dále je popsána syntéza různých thiomočovinových katalyzátorů a pokus o přípravu katalyzátoru obsahující derivát kyseliny čtvercové.
|
|
|
Synthesis of cycles using organocatalysis and catalysis with metal complexes
Hurný, David ; Veselý, Jan (advisor) ; Trnka, Tomáš (referee)
This thesis deals with an enantioselective synthesis of cyclic compounds by using a combination of organocatalysis and transition metal catalysis. The thesis deals mainly with usage of aminocatalyst for activation of aldehydes and copper catalyst for activation of terminal triple bond. The first part is focused on the preparation of starting compounds for cyclizations (α-oxoesters, α- substituted nitroalkanes and α-substituted aldehydes). The second part concerns carbocyclization itself and optimization of reaction conditions to achieve highly stereoselective reaction. Powered by TCPDF (www.tcpdf.org)
|
guest ::
RSS feed.