Log in

Relevant bibliographies by topics / Polyfenoles / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Polyfenoles.

Dissertations / Theses on the topic 'Polyfenoles'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Polyfenoles.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Haidarian, Behroz, and Christina Lidborg. "Extraktion av polyfenoler från pressrester av röda vindruvor." Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-20414.

Full text

Abstract:

Antioxidanter är kemiska ämnen som är kapabla till att förhindra oxidation av andra molekyler. Dessa ämnen återfinns i djur- och växtriket och tycks ha en skyddande effekt på cellvävnad genom att motverka skadliga oxidativa reaktioner. Antioxidanter används bland annat industriellt som tillsater i livsmedel och andra produkter i syfte att förhindra oxidativ degradering och bibehålla näringsvärdet i livsmedel. I vindruvor återfinns höga koncentrationer av naturliga antioxidanter, främst i form av fenoliska ämnen. På grund av att vinindustrin bidrar till stora mänger avfall, främst i form av dru

APA, Harvard, Vancouver, ISO, and other styles

2

Critén, Sladjana. "POLYFENOLER, VITAMINER OCH PARODONTALA SJUKDOMAR - en systematisk litteraturstudie." Thesis, Malmö högskola, Odontologiska fakulteten (OD), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-19866.

Full text

Abstract:

Syftet med denna systematiska litteraturöversikt var att utreda om det finns stöd i litteraturen avseende vilken betydelse kostens innehåll av polyfenoler och vitaminer kan ha för parodontala sjukdomar. Material och metod: En sökning i PubMed gjordes i mars 2012. Sökningen begränsades till humana studier på engelska och publicerade mellan januari 1990 och mars 2012. Kriterier för inkludering var: “randomized controlled trial”, “clinical controlled trial”, “clinical trial” och “”humans. Referenslistorna i de selekterade studierna granskades för att finna ytterligare studier som kunde inklud

APA, Harvard, Vancouver, ISO, and other styles

3

Dostálová, Blanka. "Stanovení celkového obsahu bílkovin, polyfenolů a sacharidů v pivu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240548.

Full text

Abstract:

This master‘s thesis deals with the analysis of 65 different beers, with a focus on finding differences between Czech tap ales, lagers Czech, Czech special beers and foreign beers. Czech beers were compared by the results of analysis among beers bearing the indication "Czech beer" and the group without this indication. The total amount of proteins, polyphenols and carbohydrates was determined using UV-VIS spectrometry. The history of brewing, the nature and types of Czech beers and protected geographical indication "Czech beer" were described. Raw materials for beer production and brewing tech

APA, Harvard, Vancouver, ISO, and other styles

4

Pařilová, Kateřina. "Studium vybraných aktivních látek v českém pivu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2009. http://www.nusl.cz/ntk/nusl-216475.

Full text

Abstract:

The aim of this work was to study phenolics and other active compounds in 22 kinds of lager beer and especially to find some differences between Czech beer and beers made in foreign countries. In theoretical part the most useful methods for phenolic and protein analysis are discussed. Further, basic steps of brewery technology are introduced and main beer components with regard to Czech beer specificity are presented. Analysis of total phenolics, total flavonoids, antioxidant activity and most of basic technological characteristics was performed spectrophotometrically. To identification and qu

APA, Harvard, Vancouver, ISO, and other styles

5

Měřínská, Radana. "Analýza flavonoidů v pivu metodou LC-MS." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2010. http://www.nusl.cz/ntk/nusl-216608.

Full text

Abstract:

Presented diploma thesis is focused on analysis of phenolic compounds in various types of beers. The aim of this work was to find possible differences among several types of beers and also between Czech beers and beers of foreign production. Theoretical part contains detailed description of beer technology, review of important analytical methods for determination of phenolic compounds and total antioxidant activity. The main attention is focused on instrumental technique LC/MS. In the experimental part values of total phenolics and total flavonoids and results of antioxidant status in analyzed

APA, Harvard, Vancouver, ISO, and other styles

6

Omerdic, Nermina. "Syreupptag i öl vid filtrering med kiselgur." Thesis, Linnéuniversitetet, Institutionen för kemi och biomedicin (KOB), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-82520.

Full text

Abstract:

Öl är en dryck som i ökande grad framställs av mindre bryggerier. För bryggarna är ett av målen att producera öl med så lång hållbarhet och en så jämn kvalitet som det är möjligt utifrån resurser, ekonomi och engagemang. En av svårigheterna vid ölbryggning är oönskad förekomst av syre efter jäsning. Syre i produkten kan förstöra ölets karaktär och ge upphov till oönskade smakämnen. Det här projektet har handlat om att mäta koncentrationen löst syre(O2) i öl efter filtrering med kiselgur och med några olika metoder försöka minimera syreupptag under filtreringsprocessen. Detta för att säkerställ

APA, Harvard, Vancouver, ISO, and other styles

7

Jelénková, Zuzana. "Stanovení aktivních látek v medu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216227.

Full text

Abstract:

This diploma thesis was focused on biologically active compounds determination. 26 samples of honey, one sample of propolis and one sample of royal jelly were analyzed. Honey were harvested in year 2006 and 2007 and bought in retail chain, special shops and directly from bee-keeper. Samples were analyzed by titration, spectrofotometry, LC/MS and RP-HPLC methods. The study was focused on analysis of antioxidants. Followed groups of antioxidants were determined: flavonoids, catechins, carotenoids, vitamins E, C, A. Authenticity of quality was determined by hydroxymethylfurfural analysis. Average

APA, Harvard, Vancouver, ISO, and other styles

8

Trčková, Marie. "Využití metody LC/MS k analýze vybraných přírodních fyziologicky aktivních látek." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216232.

Full text

Abstract:

Presented work is focused on application of combined instrumental method RP-HPLC/ESI-MS in analysis of several groups of natural compounds with positive physiological activities. Especially some antioxidants were studied in commonly and abundantly consumed food. Moreover some other substances than standard compounds were observed in complex dies. In conclusion the HPLC/ESI-MS method is comparatively advantageous in phenolic analysis, while another type of ionisation would be used in case of carotenoid compound.

APA, Harvard, Vancouver, ISO, and other styles

9

Smělá, Margita. "Stanovení některých nutričních faktorů ve vybraných druzích ovoce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216776.

Full text

Abstract:

Diploma thesis is concerned with determination of some nutrion factors and vitamin C in various cultivars of apples (Pirus Malus, L.) and quinces (Cydonia oblonga, Mill.). In theoretical part there are described general characterization in selected kinds of fruits, their medically significant sunstances and utilization of these fruits. Main focus is paid to vitamin C. There are described its chemical properties and effect for human health. Various methods for determination of some nutrion factors with focus on determination of vitamin C by high-performance liquid chromatography. In experimenta

APA, Harvard, Vancouver, ISO, and other styles

10

Kurzová, Pavlína. "Izolace antibakteriálních sloučenin z kávové sedliny." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-433498.

Full text

Abstract:

Coffee grounds are one of the very valuable lignocellulosic wastes that have been able to be processed and used for isolated phenolic substances. Many phenolic substances isolated from lignocellulosic wastes have antimicrobial properties. Aim of this thesis is isolation phenolic substances from spent coffee grounds extract and their available antimicrobial properties. Two isolation ways were applied to receive phenolic substances from spent coffee grounds: 1) solvent extraction (hexane, 75% ethanol, 70% acetone, diethyl ether, and ethyl acetate) and 2) release of active substances by alcoholic

APA, Harvard, Vancouver, ISO, and other styles

11

Balonková, Daniela. "Vybrané alkoholové extrakty bezu černého pro využití v kosmetologii." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401938.

Full text

Abstract:

This thesis focuses on the preparation of selected alcohol extracts of elderberry and their use in cosmetology. In the theoretical part are described the botanical properties of the elderberry (Sambucus nigra). There are introduced and characterized bioactive compounds and toxic compounds contained in all vegetative parts of the plant. Attention is mostly focused on compounds with antioxidant properties. The theoretical part also contains a description of basic analytical methods, which are used in the practical part to characterize compounds contained in elder flowers. The practical part focu

APA, Harvard, Vancouver, ISO, and other styles

12

Jašková, Martina. "Stanovení aktivních látek v instantních nápojích určených pro dětskou výživu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216755.

Full text

Abstract:

The aim of presented diploma thesis was to characterize baby beverages for early infant feeding. Theoretical part deals with baby foods and beverages including breast milk. Practical part is focused on analysis of active substances in 21 commercially available fruit and herbal instant granular baby beverages and in 3 packaged tea bags for infant and toddler age. To evaluation of antioxidant properties some group parameters were used - total polyphenols, total flavonoids, total antioxidant activity and anthocyanins. All of them were analysed by using spectrophotometrical methods. For identifica

APA, Harvard, Vancouver, ISO, and other styles

13

Kalábová, Jana. "Studium antimikrobiálního účinku vybraných druhů koření." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216977.

Full text

Abstract:

The antimicrobial effects of cinnamon, clove and ginger (grand and fresh) extracts against Bacillus subtilis, Aspergillus niger and Pichia fermentans were studied in this thesis. Selected spices were extracted in three solvents (ethanol, water and ethyl acetate) and inhibition effect on tested microorganisms was studied using two methods disc diffusion and broth dilution methods. The antioxidant activity and total polyphenolic compounds from spices were also determined. The results showed that cinnamon and clove extracts in ethyl acetate and ethanol were a promising antimicrobial substances fo

APA, Harvard, Vancouver, ISO, and other styles

14

Krůzová, Sabina. "Extrakce antioxidantů z bezových květů a úchova extraktu pro další možné využití." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376833.

Full text

Abstract:

The thesis deals with the extraction of antioxidants from elder flowers and the way of storage obtained extract. The elder flowers which are obtained by cutting trees as a waste product and after their processing it could be used as an ingredient to cosmetics products for body and face skin or in a spa like additive to baths. In theoretical part are information about black elder, its botanical characteristics, utilization and about substances contained in it. There is also a chapter about lyophilization as a method which was used for concentration of extract. The last chapter describes theoret

APA, Harvard, Vancouver, ISO, and other styles

15

Boberová, Jana. "Optimalizace technologie výroby echinaceových kapek." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-433148.

Full text

Abstract:

This diploma thesis deals with the production of herbal drops from Echinacea and the determination of the content of selected active substances. In the theoretical part, the taxonomic classification of echinacea, its botanical characteristics and growing conditions are mentioned. The history of cultivation and uses of this plant are also mentioned. An important chapter of the theoretical part is the chemical composition of the plant and differences in composition between individual cultivars of Echinacea. Methods for obtaining active substances and their determination are also mentioned. The l

APA, Harvard, Vancouver, ISO, and other styles

16

Pelikánová, Blanka. "Stanovení vybraných chemických parametrů v plodech nových odrůd rybízů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217090.

Full text

Abstract:

Presented diploma thesis is dedicated to the determination of selected chemical parameters of fruits of new currant varieties. The theoretical part is focused on the characteristics of currant, the biologically active substances of its fruits and also the utilization of current in the food industry. Further part of the theory deals with the main chemical parameters which were examined: polyphenols, anthocyanins, ascorbic acid and antioxidant activity. In the practical part there were determined selected chemical parameters in six white, twelve red and thirteen black varieties of currant. Antho

APA, Harvard, Vancouver, ISO, and other styles

17

Vysoká, Marie. "Vývoj energetických nápojů nového typu s obsahem přírodních aktivních složek." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316171.

Full text

Abstract:

The aim of this thesis is the development and preparation of a new energy drink. The theoretical part of the thesis focuses on the comparison of the drinks available in market, the presentation of the main active ingredients and the proposal of enriching the new energy drink. It also describes the possibility of using an encapsulation and the method used to determine specific compound in energy drink or encapsulated particles. In the experimental part of the work, at the beginning, the main content of energy drinks were characterized, for instance caffeine, sugar, polyphenol and vitamin C. Sub

APA, Harvard, Vancouver, ISO, and other styles

18

Konderla, Patrik. "Studium bioaktivních látek růže šípkové." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316235.

Full text

Abstract:

Purpose of this thesis was research the content of biologically active substances in herbal rosehip extracts and also determination of antimicrobial and antioxidant activity of these extracts. Teoretical part describes informations about Rosa canina L., detailed specification of biologically active substances, specification of antioxidation and overview of methods determine antioxidant compound and antimicrobial activity. In the practical part was by combination of different solvents, procedures and herbal materials, made 21 extracts of Rosa canina L.. From measuring of these extracts, was mad

APA, Harvard, Vancouver, ISO, and other styles

19

Hilli, S. (Sari). "Carbon fractions and stocks in organic layers in boreal forest soils—impacts of climatic and nutritional conditions." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514293979.

Full text

Abstract:

Abstract The SOM in boreal forests contains non-living heterogeneous components resulting from microbial and chemical transformations of organic debris from plant litter. The major components in the plant biomass all decompose at different rates and therefore, contribute variably to the stable storages of soil C. The aims of the current thesis were 1) to explore how climate, soil fertility and initial litter quality affect the decomposition rate of litter, 2) to study how the different carbon fractions found in the plant litter relate to the quality and quantity of SOM in forest soils, 3) to d

APA, Harvard, Vancouver, ISO, and other styles

20

Tomková, Martina. "Obsah antioxidačních látek ve vybraných druzích ovocných a bylinných čajů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2008. http://www.nusl.cz/ntk/nusl-216228.

Full text

Abstract:

This diploma project deals with antioxidant and antimutagenic properties of selected herbal and fruit teas commonly used in Czech population. Influence of different tea packaging (bag teas and loose leaf teas) on bioactive compound content was compared. Further, effect of long-term storage in common household conditions was studied. Antioxidant properties of teas were characterized using some group parameters - total antioxidant activity ("Randox Total Antioxidant Status Kit"), total phenolics and total flavonoids - as well as some individual representatives of low molecular weight antioxidant

APA, Harvard, Vancouver, ISO, and other styles

21

Jančíková, Simona. "Charakterizace jedlých obalů pro potenciální použití při balení potravin." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2019. http://www.nusl.cz/ntk/nusl-401908.

Full text

Abstract:

In the last years, the edible packaging has been gaining popularity due to the potential usage as the packaging for food instead of synthetic materials. The edible packaging can positively affect the packaged food by the active properties or due to its intelligent properties can monitor the changes in food. In theory, the legislation about the packaging of food and edible packaging was described. The substances for edible films preparation and additives, which can improve the properties of the edible films, were described too. In this part, the undesirable microorganisms occur in food and the

APA, Harvard, Vancouver, ISO, and other styles

22

Tomíšek, Martin. "Charakterizace rostlinné složky vybraných potravin pomocí technik molekulární biologie a instrumentálních metod." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-432719.

Full text

Abstract:

The aim of this work was to compare authenticity analysis in selected food products with fruit component by using, instrumental and molekular methods. Particularly, the presence of blueberries in fruit–based foodstuffs was verified. The theoretical part is focused on the characterization, chemical composition and botanical classification of blueberries (European blueberry and Canadian blueberry). It also contains an overview of instrumental and molecular diagnostic methods that can be used for the analysis of these fruits. The experimental part focuses on the selection of a suitable method of

APA, Harvard, Vancouver, ISO, and other styles

23

Ďubašáková, Mária. "Bioaktivní látky růže šípkové." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2018. http://www.nusl.cz/ntk/nusl-376829.

Full text

Abstract:

The aim of this master´s thesis was to determine the concentration of bioactive substances such as total polyphenols and flavonoids as well as the total antioxidant capacity in tea extracts from Rosa canina. In the second part, an experiment was found to detect antimicrobial activity and an effective concentration of ethanol against selected bacteria. The theoretical part is focused on description of natural antioxidants and their effect on free radicals, description of tea, description of rose hazel and possibilities of spectrophotometric determination of natural substances and eventually bas

APA, Harvard, Vancouver, ISO, and other styles

24

Javorská, Kateřina. "Stanovení vybraných chemických parametrů plodů moderních odrůd angreštů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2014. http://www.nusl.cz/ntk/nusl-217081.

Full text

Abstract:

Diploma thesis deals with determination of individual chemical parameters contained in modern varietes of gooseberries (Grossularia uva-crispa). The theoretical part is focused on the botanical characteristics of the plant, a description of selected varietes, chemical composition and food utilization fruits. The second half of the theoretical part is devoted to the characterization of selected nutritional parameters and methods for determination of total anthocyanins, phenolic compounds, vitamin C and antioxidant activity. Total of 17 varietes of gooseberries, which come from growers Vondráček

APA, Harvard, Vancouver, ISO, and other styles

25

Matějková, Markéta. "Sledování změn vybraných druhů lokálního ovoce v průběhu mražení." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216759.

Full text

Abstract:

This diploma thesis was focused on study of low-molecular antioxidants present in various kinds of fruits, namely berries. In theoretical part detailed characterization of antioxidants studied in presented work and their biological effects are introduced. Further, principals of processing and storage of specified species of fruits are discussed. Changes observed during storage of specific fruits are described too. In practical part changes in content of selected antioxidants in berries were followed. As studied material strawberries, raspberries, blueberries, red and black currants were used.

APA, Harvard, Vancouver, ISO, and other styles

26

Juráňová, Jana. "Stanovení vybraných nutričních faktorů v některých druzích minoritního ovoce." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2013. http://www.nusl.cz/ntk/nusl-216913.

Full text

Abstract:

The theme of this diploma thesis is an assessment of given nutritional parameters in selected kinds of lesser known fruits, specifically 10 varieties of sea buckthorn (Hippophae rhamnoides L.), 12 varieties of cornelian cherry (Cornus mas L.) and 6 varieties of blue honeysuckle (Lonicera caerulea var. kamtschatica). Harvests of two consecutive years (2011 and 2012) were analyzed in the case of blue honeysuckle. The theoretical part was focused on historical, morphological, taxonomic and nutritional aspects of individual plants and food or pharmaceutical utilization. The considerable part of th

APA, Harvard, Vancouver, ISO, and other styles

27

Vejrostová, Petra. "Studium směsných přírodních antimikrobiálních preparátů a možnosti jejich stabilizace." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240734.

Full text

Abstract:

Present diploma thesis is focused on natural antimicrobial substances. The aim of the experimental part of thesis was testing of antimicrobial activity of selected natural substances in free and encapsulated forms, preparation of particles and monitoring of their long-term stability. Various teas extracts (aqueous, ethanoic and DMSO) and aqueous herbs extracts were used as plant antimicrobial substances. Liposomes and chitosan particles with encapsulated aqueous teas extracts were prepared by ultrasonication. Encapsulation efficiency, size, stability and antioxidant activity for all particles

APA, Harvard, Vancouver, ISO, and other styles

28

Cetkovská, Jitka. "Zhodnocení fyzikálních a chemických parametrů plodů dosud méně využívaných druhů drobného ovoce a návrh nového nealkoholického nápoje z tohoto ovoce." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-263387.

Full text

Abstract:

This thesis deals with still less expolited species of small fruit, evaluation of its physical and chemical parameters and proposal of a new soft drink from one of the studied species of furit. Firstly, for the characterisation of basic nutrition parameters (dry matter, content of organic acids and saccharides) and biologicaly active substances (vitamin C, anthocyanins and phenolic compounds) suitable titration, spectrophotometric, chromatographic and electrophoretic methods were chosen, optimized and validated. The sample preparation procedure was optimized as well. For three years (2010–2012

APA, Harvard, Vancouver, ISO, and other styles

29

Vacková, Hana. "Studium biologických účinků technického konopí a jeho frakcí." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2017. http://www.nusl.cz/ntk/nusl-316189.

Full text

Abstract:

Cannabis is the only plant which contains cannabinoids and thanks to these compounds it has enormous potential. This thesis deals with the analysis of technical hemp. Effects of cannabinoids and methods used for cannabis analysis are discussed in the theoretical part. The experimental part includes spectrophotometric characterization of cannabis, it´s antimicrobial effects and thin layer chromatography analysis. Three sorts of Cannabis sativa L. were analyzed, namely Finola, Fedora and Kompolti. Firstly, the content of polyphenols, flavonoids and antioxidant activity in prepared tinctures were

APA, Harvard, Vancouver, ISO, and other styles

30

Štindlová, Jitka. "Možnosti enkapsulace přírodních antioxidantů." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216837.

Full text

Abstract:

In theoretical part of this diploma thesis the basic properties of antioxidants, especially anthocyanins and phenolic compounds are described, as well as the basic features and principles of free radicals formation. The theoretical part also describes some possible ways of encapsulation of antioxidants into polysaccharide and lipid particles. In the experimental part basic characteristics of extracts from selected lyophilized fruits and vegetables (carrots, apples and mixed berries) are described. As group parameters of plant extracts the total antioxidant activity, content of flavonoids and p

APA, Harvard, Vancouver, ISO, and other styles

31

Veselý, Ondřej. "Srovnání plodů některých odrůd zimolezů z hlediska obsahu vybraných biologicky aktivních látek." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217113.

Full text

Abstract:

This thesis is focused to the analysis of selected varieties of honeysuckle kamtschatica (Lonicera caerula var kamtschatica) and their comparison in terms of the content of biologically active substances. There were analysed only varieties grown in 2014. Theoretical part elaborates and characterized various parameters of biologically active compounds such as phenolic, anthocyanins and ascorbic acid and possibilities of their determination. Further it briefly surveys Kamchatka honeysuckle, its taxonomic and morphological properties and its nutritional properties. The experimental part of the wo

APA, Harvard, Vancouver, ISO, and other styles

32

Plášková, Anna. "Stanovení autenticity potravin rostlinného původu pomocí molekulárních metod." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2020. http://www.nusl.cz/ntk/nusl-433058.

Full text

Abstract:

The aim of presented diploma thesis was to determination of authenticity of fruit baby foods for early infant feeding using molecular methods. In the experimental part, isolation kit was used for isolation of plant DNA from fruits (strawberry, apricot, raspberry, apple) and from six commercial fruit products for children. Isolated DNA was characterized and verified using PCR methods with primers specific for plant rDNA (ITS2). Specific primer pairs were designed to amplify DNA for the detection of one fruit species. Primer specificity was assessed with four fruit species. A mixture of fruit pu

APA, Harvard, Vancouver, ISO, and other styles

33

Hájková, Tereza. "Přírodní látky v léčbě rakoviny a jejich cytotoxicita." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220049.

Full text

Abstract:

The thesis deals with the natural substances in context with the cancer disease. The natural substances have a positive effect on the human organism and they are able to influence the viability and the growth of the cancer cells. The main mechanical device is to influence the mechanisms needed to start the apoptosis of the cancer cells and stopping further proliferation. The cancer cell lines utilization in the cancer disease is discussed in the thesis too. The thesis states common methods of determining the natural substances cytotoxicity. For the experimental part of the thesis it was chosen

APA, Harvard, Vancouver, ISO, and other styles

34

Jurečková, Zuzana. "Charakterizace odrůd minoritního ovoce z hlediska využití v potravinářském průmyslu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2021. http://www.nusl.cz/ntk/nusl-438509.

Full text

Abstract:

The thesis deals with one group of small fruits, the genus Ribes, ie currants, and gooseberries. It assesses their physical and chemical parameters with respect to the possibility of use in these properties for the design of a new type of product – beverages. Titration, spectrometric and other methods were used for the evaluation of these properties. A total of fifteen of these methods were available (total juice yield, juice pH, total dry matter, soluble fruit dry matter, titratable acidity, formolic number, reducing carbohydrate content, D-glucose, D-fructose and sucrose content, total polyp

APA, Harvard, Vancouver, ISO, and other styles

35

Al, Hariri Raeed. "Olive pruning frequency and mechanization of harvesting: effects on vegetative-reproductive growth,physiology of the trees and oil quality." Doctoral thesis, 2017. http://hdl.handle.net/2158/1080536.

Full text

Abstract:

Three trials were carried in order to acquire new knowledge useful for an optimization of olive pruning and mechanization of olive harvesting and for a better understanding of olive floral/fruiting biology.

APA, Harvard, Vancouver, ISO, and other styles

36

Skarková, Anežka. "Screening polyfenolů v kávě." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-427648.

Full text

Abstract:

The thesis entitled Screening of Polyphenols in Coffee deals with origins and attri-butes of particular types and technologies of coffee making.The theoretical section focuses on occurance and importance of biologically active compounds contained in coffee that might have both positive and negative impact on human´s health. I also mention the legislation related to the issue of defining and labeling the coffee. Regarding the most current lifestyle diseases and various social groups I describe the general influence of coffee on human´s health and the most common methods of determination polyphe

APA, Harvard, Vancouver, ISO, and other styles

37

Kondrashov, Alexey. "Biochemie účinků polyfenolů v léčbě vaskulárních onemocnění." Doctoral thesis, 2011. http://www.nusl.cz/ntk/nusl-297732.

Full text

Abstract:

This Ph.D. thesis deals with the deep analysis of polyphenols effects toward vascular disorders. This work provides a number of experimental results of studying both the effects of natural bioactive compounds in red wines and potatoes, and their application to the experiments which includes experimental animal models with spontaneous hypertension. Methods and equipment used in experimental studies allowed us to make several new statements regarding the universal nature of the relationships between the antioxidant capacity and the polyphenolic content in examined foodstuffs. Besides this it is

APA, Harvard, Vancouver, ISO, and other styles

38

Vyhnálek, Petr. "Screening antiradikálové aktivity drog s obsahem polyfenolů." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-287634.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Kvita, Vojtěch. "Účinek polyfenolů ze zeleného čaje na antioxidační enzymy u myší in vivo." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-339208.

Full text

Abstract:

Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Biochemical Sciences Candidate: Vojtěch Kvita Supervisor: PharmDr. Hana Bártíková, Ph.D. Title of diploma thesis: The effect of green tea polyphenols on antioxidant enzymes in mice in vivo Antioxidant enzymes belong to compounds with proven effects on human organism. Their main purpose is to defend cells against oxidative stress. In order to support this process, we are taking substances called antioxidants either in regular diet or as dietary supplements. Recently there are a lot of companies on the market, offer

APA, Harvard, Vancouver, ISO, and other styles

40

Prokopcová, Zdeňka. "Variabilita kyseliny ferulové v odlišných odrůdách ječmene." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-87967.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Kubicová, Marta. "Analýza vybraných polyfenolických látek v pivu technikou HPLC." Master's thesis, 2007. http://www.nusl.cz/ntk/nusl-92574.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Čížek, Milan. "Možnosti zvýšení obsahu nutričně významných látek v bramborách." Doctoral thesis, 2009. http://www.nusl.cz/ntk/nusl-93619.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Strejčková, Aneta. "Biologicky aktivní látky v medu." Master's thesis, 2015. http://www.nusl.cz/ntk/nusl-250232.

Full text

Abstract:

This thesis is concerned with biologically active substances in honey. The first part describes the characteristics of honey, its origin and its composition. It also deals with the polyphenols and importance of honey on human health. Polyphenols are the subject of many studies and was therefore chosen as representatives of the major biologically active substances. It describes their characteristics and representations of honey. The second part deals with the determination of polyphenols. For this purpose were selected 14 phenolic acids, which was determined in 8 kinds of honey. Analysis was pe

APA, Harvard, Vancouver, ISO, and other styles

44

Žákovič, Peter. "Využití nanovlákenných struktur ve filtraci." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-426626.

Full text

Abstract:

In this diploma thesis, we focused on the filtration of wine, the type of filtration and the filtration methods currently used in the literary section. Further, filtration materials, which are used in wine filtration and, last but not least, the use of nanoparticles in viticulture and winemaking, have been described. In the practical part, commercial filter types were used, namely Cartridge filter C11 with nanofibrous filter membrane RIFTELEN N15-2 and RIFTELEN N15-5, which we compared with the Zambelli plate filter, in which we used filter plates HOBRAFILT S15N and HOBRAFILT S30N. In particul

APA, Harvard, Vancouver, ISO, and other styles

45

Petráň, David. "Stanovení koloidní stability u vybraných druhů piv." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-179618.

Full text

Abstract:

Unlike majority of sorts of alcoholic drinks beer is considered significantly un-stable. This thesis examines the factors influencing the stability of beer, especially phys-ical-chemical, primarily content of polyphenols and potential of components of beer to form haze. Twenty eight samples from differently large breweries were processed (Černá Hora, Poutník Pelhřimov, Pegas, Richard and minibrewery of Mendel University in Brno). The total content of polyphenols was determined using the Folin-Ciocalteu method (spectrophotometrically at 750 nm) and subsequently expressed in the content of ferul

APA, Harvard, Vancouver, ISO, and other styles

46

Deutscharová, Jitka. "Obohacené nápoje na bázi vína." Master's thesis, 2014. http://www.nusl.cz/ntk/nusl-190282.

Full text

Abstract:

This thesis was prepared at the Institute of Post-Harvest Technologies of Horticulture at the Faculty of Horticulture of the Mendel University in Brno in years 2012/2014. The aim of this thesis was to elaborate on the nutritional constitution of wines with emphasis on phenolic components, to deal with methods of determination of the antioxidant activity and to compile the legislative requirements relevant to selected wines. In the experimental part, wine-based beverages with the addition of wood chips or their extracts were designed and prepared. Subsequently, selected quality parameters of th

APA, Harvard, Vancouver, ISO, and other styles

47

Pelcová, Lucie. "Stanovení přírodních antioxidantů v ovocných džusech." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-362639.

Full text

Abstract:

The objective of this thesis was to investigate the content of polyphenols in these juices: apple from concentrate, apple produced by direct compression, orange with pulp, orange without pulp, grapefruit from concentrate, juice from red grapes, pomegranate and purple carrots. The measurement was taken by high performance liquid chromatography and mass spectrometry. The polyphenol with the highest overall value and also the most important of polyphenols in citrus juices was hesperidin. Significant content of cryptochlorogenic acid and hyperoside was in apple juice. Apple juice produced by direc

APA, Harvard, Vancouver, ISO, and other styles

48

Šajtarová, Pavla. "Použití polyvinylpolypyrrolidonu a možnosti jeho regenerace v nápojovém průmyslu." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-363264.

Full text

Abstract:

This diploma thesis is focused on the topic The use of polyvinylpolypyrrolidone and possibilities of its regeneration in the beverage industry. The thesis was written in years 2015/2016 at the Department of Post-Harvest Technology of Horticultural Products, Faculty of Horticulture at Mendel University in Brno. The theoretical part deals with the polyphenolics compounds in wine, antioxidant capacity and wine defects related to polyphenols. The last chapter offers multiple methods of removing defects, where the highest priority is given to the clarifier PVPP. The experimental part is aimed at th

APA, Harvard, Vancouver, ISO, and other styles

49

Džuppa, Mikuláš. "Štúdium antioxidačných vlastností čajov." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-426532.

Full text

Abstract:

The Diploma Thesis is focused on the analysis of the antioxidant qualities and attributes of different kinds of tea under their specific methods of preparation. Literature overview provides history, processing technology, distribution and the most common means of tea preparation as well as its content substances. The Thesis discusses the overall containment of polyphenols and antioxidant capacity based on the FRAP and DPPH methods but also the amount of vitamin C in the tea samples. The Thesis elaborates on the undertaken sensor analysis of chosen samples and examines the tea content substance

APA, Harvard, Vancouver, ISO, and other styles

50

Ošťádalová, Ilona. "Metabolický profil biologicky významných látek v medu." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-430290.

Full text

Abstract:

This thesis is introducing us theme of the metabolic profile of biologically important compounds in honey. This thesis is devided into two parts. The first part (the literature review) is introducing characteristic of honey, history of a use for medical purposes, honey content, content of biologically active compounds and their positive effects on human health. There are also described methods of determination polyfenolic compounds in honey. The second part of this thesis (practical part) deals with determination of polyfenols in 11 kinds of honey using the high pressure liquid chromatography

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!