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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Použití přenosného XRF spektrometru pro hodnocení kvality vápencové suroviny a odhad zásob na ložisku Mořina - východ (Velká Amerika) / Application of portable XRF spectrometer for evaluation of the quality of limestone ore and estimation of reserves at the Mořina - východ (Velká Amerika) deposit

Pechar, Tomáš January 2014 (has links)
The present thesis provides assessment potential of the Mořina - Východ deposit (Velká Amerika) as a raw material reserves for the Kozolupy - Čeřinka deposit. The reason for this work is limited lifetime of the Kozolupy - Čeřinka deposit (approx. 11-14 years) that does not allow fulfilling the requirement to ensure the production of limestone for flue gas desulphurization for ČEZ until 2035. Objective of this work is to summarize all the existing knowledge of the deposit and define the expected technological parameters of raw materials and consider the possibility of its use as a raw material for flue gas desulphurization. Special attention was paid to dolomitization of the limestone, namely to its extent and nature, because elevated Mg content lowers the quality of the limestone ore. Finally, ore reserve calculations and mining intentions are presented. On the basis of microscopic research two types of dolomite were distinguish: diagenetic and epigenetic. Diagenetic dolomite originated at shallow burial together with recrystallization of limestone slurry at temperatures up to 50 řC. Homogenization temperatures of primary fluid inclusions in epigenetic dolomite lay in the range 76-92 řC (sample A9) and 63-88 řC (sample A25).The trapping temperature of these inclusions was probably only slightly...
22

Ramanova spektrometrie karotenoidů vybraných mikroorganismů / Raman spectrometry of carotenoids of selected microorganisms

Novotná, Julie January 2014 (has links)
In this thesis Raman spectroscopy is evaluated as a tool of identification and discrimination of carotenoids from microbial biomass. Microorganisms, halophilic or nonhalophilic, belong to Cyanobacteria, Proteobacteria, Chlorophyta, Rhodophyta and to others. Biomass was cultiveted under laboratory conditions and yielded varied colours. Raman spectra were recorded succesfully from lyophilized biomass by excitation wavelenth 514.5 nm (dispersive Raman microspectrometr) and 1064 nm (FT Raman spectrometer). Results were compared with Raman spectroscopic data from pigment extracts. Spectra of carotenoids are characterized by the main Raman bands υ1, υ2 a υ3 due to C=C stretching, C-C stretching and C-CH3 deformation. HPLC/UV-VIS allows effective pigment separation from extracts and detection of separated pigments by UV-VIS analyzator. Assessment of Raman analysis and its potential to detect microbial carotenoids are discused. Sarcinaxantin is an unusual carotenoid identified together with more common β - carotene. Raman spectroscopic results obtained on carotenoids recorded from colonies which accumulated more than one carotenoid need to be interpreted carefully. Powered by TCPDF (www.tcpdf.org)
23

Použitelnost Ramanových spektrometrů (excitace 785 nm) pro deteckci tmavých minerálů / Estimation of Raman spectrometric instruments (785 nm excitation) for detection of dark minerals

Šimon, Jan January 2013 (has links)
Summary: Raman spectroscopy is a widely used method in geoscience fields. Using a portable Raman spectrometer is possible to identify different materials, Raman spectrometer will participate in the survey the Martian surface. Its use is widely applied in mineralogy. There was measured a set of dark, green and some bright minerals of different mineralogical system groups that have been assessed the applicability of the chosen detector excitation at 785 nm mainly off-road equipment. The obtained spectra were measured off-road equipment ahura and delta nu at excitation 785 nm and laboratory equipment InVia Renishaw and there were used lasers at excitaion of 785 nm and 514 nm. It was set of these minerals: Prehnite, Sulphur, Tyrkenit (howlit), Pyroxene (diopside), Libethenite, Toutmaline (verdelite), Dioptas, Klinoklas, Langit, Jadeit, Pseudomalachit (ehlit), Actinolite, Epidote, Augite. Some minerals were measured off-road equipment acquired spectrum, witch corresponded with laboratory measurements, the spectra of other optical properties due to their ambiguous. Keywords: Raman spektroscopy, portable Raman spectrometer, mineralogy, dark and green minerals
24

Studium NK receptorů a jiných proteinů metodami rekombinantní exprese a hmotnostní spektrometrie / Studies of NK cell receptors and other proteins using recombinant expression and mass spectrometry

Kavan, Daniel January 2010 (has links)
Charles University in Prague Faculty of Science Department of Biochemistry Studies of NK cell receptors and other proteins using recombinant expressions and mass spectrometry Summary of Ph. D. Thesis Daniel Kavan Supervisor: Prof. RNDr. Karel Bezouška, DSc. Prague 2010 Daniel Kavan Introduction Introduction NK cells and CD69 as one of their surface receptors Natural killer cells (NK cells) are the subpopulation of large granular lymfocytes, which lacks the surface receptors typical for B cells or T cells. They are characterized by the presence of NKp46 and NKp30 [Moretta L. et. al. 2002], however. They were named natural killers according to their function in the organism, as they do not need any activation and nevertheless they are able to eliminate abnormal (i. e. infected or transformed) cells from the tissue [Kiessling R. et. al. 1975]. This function is dependent on scanning the major histocompatibility complex (MHC) class I molecules of ambient cells. The resulting action (killing or not killing the target cell) is dependent on the balance of activating and inhibiting signals mediated by the NK cell surface receptors and forwarded to the specific signaling pathway [Raulet D. H. et. al. 2001]. Specificity of NK cells is not based only on one type of antigen receptor as it is in case of T and B cells,...
25

Využití Ramanovy spektroskopie pro identifikaci organických inkluzí minerálů pro účely exobiologie / Application of Raman spectroscopy for the identification of organic inclusions in minerals for the field of exobiology

Osterrothová, Kateřina January 2011 (has links)
The multidisciplinary field of astrobiology has grown rapidly in recent years. The major goals of research in the field have been the search for habitable environments both within and outside our solar system, the search for evidence of prebiotic chemistry and life on Mars and other bodies in our solar system, laboratory and field research into the origins and early evolution of life on Earth, and studies of the potential for life to adapt to challenges on Earth and in space. NASA and ESA are heavily focused on a number of upcoming exploratory missions (e.g., the Mars Science Laboratory, with its planned launch in the fall 2011; ExoMars 2018; and the follow-up Mars Sample Return missions beyond 2020). A Raman spectrometer is now being miniaturized for the ExoMars Rover Instrument Suite. This Raman instrument is expected to be used to identify organic compounds and mineral products that could be related to signatures of life, as well as provide a general mineralogical overview, especially those minerals produced by water- related processes. This thesis describes the results of laboratory investigation into the feasibility of Raman spectroscopy to detect different types of biomarkers (pigments, carboxylic acids, and aminoacids) first mixed in the mineral matrices and...
26

Beitrag zur zerstörungsfreien Bestimmung des räumlichen Konzentrationsprofils von Chromophoren in biologischen Geweben mittels photoakustischer Spektroskopie /

Schmidt, Kai, January 2000 (has links)
Thesis (doctoral)--Universität der Bundeswehr, München, 2000. / Includes bibliographical references (p. 165-172).
27

Nichtinvasive Messung von Blutparameter mit Infrarot-Quantenkaskadenlaser und photoakustischer Detektion

Xhelaj, Arjan. Unknown Date (has links)
Universiẗat, Diss., 2008--Frankfurt (Main). / Engl. Übers. des Hauptsacht.: Non-invasive measurement of blood parameter with infrared-quantum cascade laser and photoacoustic detection.
28

Sója - funkční potravina

Zedníčková, Pavlína January 2015 (has links)
This diploma thesis is about soybean as functional food. Functional food contain components with positive effect on human health. In soybean there are lot of these components and very valued are phytoestrogens. Phytoestrogens has estrogenic activity with positive effect in prevention of osteoporosis, breast and prostate cancer, cardiovascular disease and menopausal problems. In experimental part was measured level of isoflavones in different kinds of soy food. The method for separation was high performance liquid chromatography with mass spectrometry.
29

Proteome dynamics during seed germination

Habánová, Hana January 2016 (has links)
Seed germination is a crucial phase of the plant life cycle. Despite the huge progress that has been made in the last decade, the molecular mechanisms regulating seed germination are far from being resolved. Most of the early events of germination are mediated by molecules stored in seeds during the seed development and thus we employed proteomic analyses to elucidate the mechanism behind this process. This thesis - Proteome dynamics during seed germination - reviews present-day knowledge of this topic. In the experimental part, the results of three related research projects are summarized. First, the effects of a novel class of growth regulators were analyzed in the barley germination assay and the optimal concentrations were determined. The methodology for an improved analysis of barley seed proteins was developed and the optimized targeted analysis will allows the detection of over 4,000 proteins. Finally, Arabidopsis thaliana seed proteome was analyzed and the results indicate that (i) an alternative MS/MS data processing significantly improves the detection limits and (ii) the proteasome-ubiquitin system plays a crucial role in adjusting the seed proteome dynamics during the germination progress.
30

Změny ve složení mléka a sýrů eidamského typu během roku a využití FT NIR spektrometrie ke kontrole falšování sýrů

Dubová, Alice January 2010 (has links)
No description available.

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