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Dissertations / Theses on the topic 'Microwave Irradiation And Chalcone'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Booi, Mlamli. "Ore sorting using microwave irradiation." Master's thesis, University of Cape Town, 1989. http://hdl.handle.net/11427/8336.

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Bibliography: leaves 99-101.<br>Automatic ore sorting machines are in common use in the mining industry. These machines generally separate valuable mineral-bearing rocks from waste rocks. At the Premier Diamond Mine in South Africa kimberlite, a diamond-bearing rock is separated from gabbro which is a waste rock. Work had been conducted previously in the Department of Electrical Engineering at the University of Cape Town to find a viable method for discriminating between gabbro and kimberlite. A technique using microwave irradiation attenuation was successful when using parallel-sided smooth-s

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2

Mercer, Sean R. "Rock differentiation using microwave irradiation." Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/9638.

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Includes bibliographical references.<br>This project arose as a result of inefficiencies in the diamond recovery process at Premier Mine. A considerable amount of barren waste rock, gabbro, is mined along with the diamond bearing kimberlite. No automated method exists for separating the kimberlite from the waste rock and a device was required to effect ore sorting on a rock by rock basis. Experimentation with a microwave oven indicated that samples of kimberlite were more attenuative than samples of gabbro. The possibility of using microwave heating for rock differentiation was investigated bu

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3

Rana, Aman. "Optimizing Weed Management via Microwave Irradiation." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/75115.

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One potential alternative to chemical weed control is the use of microwave radiation, a particular form of indirect thermal weeding. Absorption of microwave radiation causes water molecules within the tissue to oscillate, thereby converting electromagnetic energy into heat. This technique is rapid, versatile and effective, as the electromagnetic waves heat the plant tissue and destroy cellular integrity. The objective of this research was to evaluate the potential use of dielectric heating for weed management. Ten weed species representing monocots and dicots were selected for this study:

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4

Cheng, Yulin, Jiacheng Wu, Jinwei Zhang, and Wuyong Chen. "A Novel Collagen Extraction Method Based on Microwave Irradiation - 79." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34275.

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Content: Microwave was used as a thermal source to extract collagen acid from the cattle hide in the present work. The effects of microwave on collagen extraction yields were studied under different microwave temperatures, time and hide-liquid ratio. The optimal extraction process was obtained by an orthogonal experiment, and the composition, structure and properties of the extracted collagen were characterized by amino acid analysis, SDS-PAGE, FTIR, UV-Vis, CD, FL, and VP-DSC. The results showed that the extraction rate of collagen was positively correlated with temperature, time and hide-liq

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5

Wu, Jiacheng, Guoqiang Ning, Jinwei Zhang, and Wuyong Chen. "Ti (III)-tannin combination tanning technology based on microwave irradiation - 76." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34274.

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Content: Microwave is a fast, efficient and energy-saving thermal resource, hence an attempt has been made for applying this technology in the combination tanning using titanium (III) and tannin extracts. In this work, the microwave effects on the complex reaction of Ti (III) with tannin extracts and leather products properties were investigated. The precipitation condition was used to characterize the complexation degree between Ti (III) and tannin extracts. And the shrinkage temperature, tear strength, SEM, DSC, TG, FT-IR, and histological structure were used to characterize the changes in t

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Zhang, Jinwei, Wuyong Chen, and Carmen Gaidau. "Chrome tanning process and the leather properties under microwave irradiation - 92." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34276.

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Content: In leather making processes, the thermal and non-thermal effect of microwave, especially non-thermal effect, strengthen the combination between collagen and chemicals. Although tanning under microwave makes the leather have better thermal stability, the tanning process and leather properties have not been studied in detail. For illustrating the influence of microwave on chrome tanning process, pickled skin was tanned for 6h as penetration procedure and then basified for another 4h as fixation procedure. The tanning under microwave heating (MW) was experimental sample and under water b

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7

Banci, Gabriele. "New methods for rapid h/d exchange and related processing using microwave irradiation." Thesis, Cardiff University, 2013. http://orca.cf.ac.uk/49931/.

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Microwave mediated H/D exchanges have been studiedin this thesis. The purpose of these studies is to validate an efficient method for replacing hydrogen by deuterium in molecules with biological and pharmaceutical activity. As a result of this, such deuterated compounds would be helpful during the investigation of pharmacological and metabolic studies. At the beginning of this research, aniline derivatives weremainly employed as substrates. Their importance in drug synthesis makes the corresponding labelled compounds useful as building blocks. During these studies a Pt catalyst wasemployed. As

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8

Jackman, Mary Megan. "Microwave-Promoted Iminyl Radical Fragmentations: A Practical and Efficient Method of Functionalization." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6946.

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We report a novel fragmentation and functionalization method using a cyclic iminyl radical. Formation of this radical occurs by microwave heating under mild conditions and short reaction times. The reaction avoids the use of explosive or toxic radical initiators and propagating agents. This reaction is versatile, with the ability to install two functional groups that are ultimately derived from a ketone in the substrate precursor. A variety of radical traps capable of forming both carbon-carbon bonds and carbon-heteroatom bonds have been tested, and the products are obtained in good yields. We

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9

Mouquinho, Ana Isabel Machado. "Selective synthesis under microwave irradiation of new monomers for potential applications in PDLC films." Master's thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/8089.

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Dissertation to obtain the degree of master in Bioorganic<br>Polymer dispersed liquid crystal (PDLC) films consist, commonly, on nematic liquid crystal domains dispersed in a polymeric matrix. These composites can be switched electrically from an opaque scattering state to a highly transparent state by an applied electric field. The molecular structure of the polymerisable monomers that can be incorporated as polymeric matrix plays an important role in the performance of PDLCs. Therefore, the aims of this work were to design and synthesise several new monomers that could be polymerised photoch

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10

Dailo, Mark Paul Jimena. "Catalytic Activity of Heteropoly Tungstophosphoric Acid supported on Partially Reduced Graphene Oxide Prepared by Laser and Microwave Irradiation." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3671.

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The solid acid catalyst of the Keggin-type 12-tungstophosphoric acid (H3PW12O40, HPW) is supported on partially reduced graphene oxide (PRGO) nanosheets for acid-catalyzed reactions. HPW is a new class of catalyst with a good thermal stability and high Bronsted acidity in order to replace common mineral acids. However, it has low specific surface area (1-5 m2/g). Therefore, the possibility of PRGO as a catalytic support for HPW is investigated due to its high surface area (2630 m2/g) and good thermal stability. The synthesis of HPW-GO catalyst is prepared using microwave and laser irradiation

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11

Al-Jundi, Abdul Nasser. "Elucidation of nonthermal effects of microwave irradiation on the unfolding pathways of [beta]-lactoglobulin and hemoglobin." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81583.

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In recent years there has been considerable interest in the development of microwave-based food processing technologies. Microwave radiation is considered to have both thermal and non-thermal effects. The thermal effects are related to the heat generated by the absorption of microwave energy by water or by organic molecules, but very little is known about the mechanisms involved in the putative non-thermal effects. It has been postulated that the latter could involve a direct energy transfer from the electromagnetic field to the vibrational modes of macromolecules, altering their confor

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12

Thibault, Gabriel. "Effects of microwave irradiation on the characteristics and mesophilic anaerobic digestion of sequencing batch reactor sludge." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27186.

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Wastewater treatment generates large quantities of sewage sludge whose disposal is expensive. Mainly because anaerobic digestion produces methane, which can be beneficially used as an energy source, this process has become the most popular means of stabilizing sewage sludge prior to spreading on agricultural land or disposal to landfills. Several pretreatment technologies have recently been developed to render sludge more degradable during anaerobic digestion. The purpose of this study is to investigate whether microwave irradiation can enhance the anaerobic degradability of aerobic sequencing

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13

Lee, Guan Liang. "Computational Modelling and Investigation of Liquid Heating and Boiling Phenomena subject to Microwave and Ultrasound Irradiation." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/81970.

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This research aims to gain fundamental insights into the liquid heating and boiling phenomena under Microwave (MW) and Ultrasound irradiation (MW) via computational multiphysics simulation. To this end, four new computational models are developed and validated experimentally. These models are used to investigate the aforementioned phenomena. The interactions between MW, US and fluid flow during heating, as well as liquid boiling and superheating effect by MW are studied and analyzed in detail.

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Magida, Nokuthula Ethel. "Biodiesel production from sunflower oil using microwave assisted transesterification / by Nokuthula E. Magida." Thesis, North-West University, 2013. http://hdl.handle.net/10394/8768.

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Biofuels are becoming more attractive worldwide because of the high energy demands and the fossil fuel resources that are being depleted. Biodiesel is one of the most attractive alternative energy sources to petroleum diesel fuel and it is renewable, non toxic, biodegradable, has low sulphur content and has a high flash point. Biodiesel can be generated from domestic natural resources such as coconuts, rapeseeds, soybeans, sunflower, and waste cooking oil through a commonly used method called transesterification. Transesterification is a reaction whereby oil (e.g. sun

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15

Mert-Balci, Fadime [Verfasser], and Uwe [Akademischer Betreuer] Beifuss. "Influence of microwave irradiation and ionic liquids on multi component reactions / Fadime Mert-Balci. Betreuer: Uwe Beifuss." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2013. http://d-nb.info/1042992193/34.

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16

Webb, Bettine Constance. "Laboratory And Clinical Studies On The Treatment Of Candida-Associated Denture Stomatitis With Sodium Hypochlorite Or Microwave Irradiation." Thesis, The University of Sydney, 1996. http://hdl.handle.net/2123/4974.

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This thesis describes experiments which were carried out at the Institute of Dental Research in Sydney and within the Department of Prosthetic Dentistry at the United Dental Hospital of Sydney between February 1991 and May 1996. The study is concerned with finding practical means of treating chronic atrophic candidosis, also referred to as Candida-associated denture stomatitis and to this purpose two methods of denture disinfection are investigated, namely, sodium hypoclorite denture soak and microwave irradiation. Although the aetiology of denture stomatitis is generally considered to be mult

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Webb, Bettine Constance. "Laboratory and clinical studies on the treatment of candida-associated denture stomatitis with sodium hypochlorite or microwave irradiation." University of Sydney, 1996. http://hdl.handle.net/2123/4466.

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Doctor of Philosophy<br>This thesis describes experiments which were carried out at the Institute of Dental Research in Sydney and within the Department of Prosthetic Dentistry at the United Dental Hospital of Sydney between February 1991 and May 1996. The study is concerned with finding practical means of treating chronic atrophic candidosis, also referred to as Candida-associated denture stomatitis and to this purpose two methods of denture disinfection are investigated, namely, sodium hypoclorite denture soak and microwave irradiation. Although the aetiology of denture stomatitis is general

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18

Kärkkäinen, J. (Johanna). "Preparation and characterization of some ionic liquids and their use in the dimerization reaction of 2-methylpropene." Doctoral thesis, University of Oulu, 2007. http://urn.fi/urn:isbn:9789514283550.

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Abstract This study concentrates on the preparation and characterization of some ionic liquids and their use in dimerization reaction of 2-methylpropene. Ionic liquids consist of cations and anions, and are commonly understood as green solvents. By definition their melting points should be lower than 100 °C. Prepared ionic liquids were used as catalytic solvents in dimerizations of 2-methylpropene to a high octane compound, isooctene. The monograph consists of two parts: the literature survey and the practical work. The literature survey reviews the preparation and characterization of ionic li

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19

Rouillard, Hervé. "Etude de résolutions catalysées par des lipases sous irradiation micro-onde." Phd thesis, Université de La Rochelle, 2012. http://tel.archives-ouvertes.fr/tel-00815983.

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La demande en composés chiraux est en plein essor ces dernières années. Pour accéder à leur synthèse, la biocatalyse, couplée à l'irradiation pourrait être une méthode innovante. Il existe en effet de nombreux cas dans la littérature où l'utilisation de micro-onde semble avoir un effet activateur sur l'efficacité enzymatique.Cependant, l'effet de l'irradiation micro-onde est mal compris et controversé. Le but de cette thèse était d'étudier l'impact de l'irradiation micro-onde sur des lipases, immobilisées ou non, en étudiant différentes réactions modèles, allant de la résolution d'alcools seco

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20

Davis-Wheeler, Chin Clare. "Platinum@Hexaniobate Nanopeapods: Sensitized Composite Architectures for Photocatalytic Hydrogen Evolution Under Visible Light Irradiation." ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2503.

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Hydrogen fuel is one of the most important areas of research in the field of renewable energy development and production. Hydrogen gas can be generated by fuel cells, water electrolyzers, and heterogeneous nanoscale catalysts. It can be burned to directly release chemical energy or condensed for storage and transport, providing fuel for combustion devices or storing excess energy generated by renewable sources such as wind turbines and concentrated solar power assemblies. While platinum is the most active catalyst for hydrogen reduction, its high cost significantly deters its utilization in ad

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Bayrakceken, Ayse. "Platinum And Platinum-ruthenium Based Catalysts On Various Carbon Supports Prepared By Different Methods For Pem Fuel Cell Applications." Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609448/index.pdf.

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Proton exchange membrane fuel cells are one of the most promising hydrogen energy conversion devices for portable, mobile and stationary applications. For wide spread usage to produce electricity platinum loading has to be decreased by using highly active electrocatalysts. Even 10 ppm carbon monoxide or higher than 30% carbon dioxide cause performance losses via deactivation which can be diminished by using binary catalysts. The aim of this thesis is to develop new platinum based electrocatalysts with high catalytic activity and to overcome the problems due to the deactivation. platinum and pl

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22

Legras, Benoit. "Adsorptions et désorptions compétitives sous irradiation micro-ondes : étude de la conversion d’énergie électromagnétique couplée aux transferts de matière et de chaleur." Thesis, Rouen, INSA, 2011. http://www.theses.fr/2011ISAM0017/document.

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Dans cette thèse, nous nous sommes particulièrement intéressés au cas d'adsorptions compétitives sur des zéolithes, de molécules polaires en phase gaz, sous irradiation micro-ondes. Dans un premier temps, nous avons étudié de façon approfondie les mécanismes d'interactions onde-matière sur des systèmes adsorbant-adsorbant à l'aide de mesures de permittivités. Dans un second temps, des adsorptions ont été effectuées à l'échelle pilote et ont permis d'analyser les possibilités réelles, offertes par les micro-ondes. Le procédé de régénération adsorbant sous micro-ondes a été décrit à l'aide d'un

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23

Saggadi, Hanen. "Valorisation du glycérol sous irradiation micro-ondes : synthèse de quinoléines, de l’échelle du laboratoire à l’échelle pilote." Thesis, Compiègne, 2014. http://www.theses.fr/2014COMP1909.

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Le glycérol, principal coproduit de l’industrie du biodiesel (10% massique), représente un solvant et un réactif d’un grand intérêt pour la chimie verte. La déshydratation du glycérol en acroléine est une voie intéressante pour sa valorisation. En effet, cet aldéhyde constitue une molécule plate-forme pour de nombreuses applications. En revanche, il s’agit d’un produit instable, toxique et inflammable, ce qui rend sa manipulation et sa manutention particulièrement dangereuses. Cette difficulté peut être surmontée par une transformation in-situ de l’acroléine formée par déshydratation du glycér

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24

Collins, Marina V. "The Effects of E-Beam Irradiation, Microwave Energy and High Hydrostatic Pressure on Presence and Health Significance of Cryptosporidium parvum in Eastern Oysters (Crassostrea virginica)." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/26355.

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Foodborne disease outbreaks associated with the protozoan parasite Cryptosporidium spp. are an emerging public health concern. Shellfish, including Eastern oysters (Crassostrea virginica) in Chesapeake Bay and other Atlantic coastal waters, have been identified as a potential source of Cryptosporidium parvum infection for humans. The inactivation of C. parvum and other pathogens in raw molluscan shellfish would provide increased food safety for normal and at-risk consumers. The objectives of this study were to evaluate the efficacy of three alternative food-processing treatments (e-beam irradi

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25

Nübler, Johannes [Verfasser], and David [Akademischer Betreuer] Wharam. "Density Dependence of the v=5/2 Fractional Quantum Hall Effect - Compressibility of a Two-dimensional Electron System under Microwave Irradiation / Johannes Nübler ; Betreuer: David Wharam." Tübingen : Universitätsbibliothek Tübingen, 2011. http://d-nb.info/1162699248/34.

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26

TORSELLO, DANIELE. "Influence of disorder on the fundamental properties of Iron Based Superconductors." Doctoral thesis, Politecnico di Torino, 2020. http://hdl.handle.net/11583/2809316.

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27

Azzolina, Jury Federico. "Préparation et caractérisation de zéolithes dopées par des métaux de transition : Mesure de propriétés diélectriques et magnétiques et leur application à la synthèse de composés chimiques sous irradiation microondes." Thesis, Rouen, INSA, 2013. http://www.theses.fr/2013ISAM0025.

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Cette étude est centrée sur la synthèse et la préparation de zéolithes modifiées par des métaux de transition avec leurs applications en catalyse sous irradiation microondes. Des travaux précédents ont montré l’intérêt de modifier des zéolithes avec des métaux de transition pour leur application sur des réactions d’oxydation et d’utiliser les microondes afin d’augmenter les vitesses de réaction. Dans cette thèse, nous avons étudié deux types de structure zéolithique (MEL et FAU) dopés par des métaux de transition (Co, Mn, Fe, Zn, Ni, Cr) à différentes concentrations. Une étude classique de car

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Herring, Natalie. "Formation Mechanisms and Photocatalytic Properties of ZnO-Based Nanomaterials." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/494.

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Zinc Oxide (ZnO) is one of the most extensively studied semiconductors because of its unique properties, namely, its wide band gap (3.37 eV) and high excitation binding energy (60 meV). These properties make ZnO a promising material for uses in a broad range of applications including sensors, catalysis and optoelectronic devices. The presented research covers a broad spectrum of these interesting nanomaterials, from their synthesis and characterization to their use as photocatalyts. A new synthetic approach for producing morphology controlled ZnO nanostructures was developed using microwave i

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Seixas, André Luís da Rosa. "PURIFICAÇÃO DE NANOTUBOS DE CARBONO." Centro Universitário Franciscano, 2010. http://www.tede.universidadefranciscana.edu.br:8080/handle/UFN-BDTD/478.

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Submitted by MARCIA ROVADOSCHI (marciar@unifra.br) on 2018-08-14T19:33:27Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AndreLuisDaRosaSeixas.pdf: 3229232 bytes, checksum: 35b1061853e1cce25d7bad1657766eaa (MD5)<br>Made available in DSpace on 2018-08-14T19:33:27Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Dissertacao_AndreLuisDaRosaSeixas.pdf: 3229232 bytes, checksum: 35b1061853e1cce25d7bad1657766eaa (MD5) Previous issue date: 2010-03-30<br>Carbon Nanotubes (CNT) are obtained by

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Couly, Florence. "Modifications fonctionnelles en position C2 des 8-alkylthiazolo[5,4-f]quinazolin-9(8H)-ones et stratégie d’extension de fragment pour la synthèse d’inhibiteurs de kinases de la famille DYRK." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMIR12/document.

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Les effets du dérèglement de l’expression des protéines kinases DYRK (Dual-specificity tyrosine phosphorylation-regulated kinase) et plus particulièrement de DYRK1A sont étudiées dans le cas des maladies neurodégénératives (maladie d’Alzheimer, syndrome de Down) et celui de certains cancers. Ces travaux de thèse s’inscrivent dans la continuité des acquis du laboratoire et des résultats des évaluations de l’activité inhibitrice obtenus sur les thiazolo[5,4-f]quinazolines et les thiazolo[5,4-f]quinazolin-9(8H)-ones. L’objectif principal est la modulation du groupement en position C2 des thiazolo

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Komaty, Sarah. "Extraction de métabolites du lichen "Pseudevernia furfuracea" via la technologie des liquides ioniques sous irradiation micro-onde." Thesis, Rennes 1, 2014. http://www.theses.fr/2014REN1S166.

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Les lichens sont des organismes symbiotiques constitués d'un champignon (mycobionte) associé à une algue et/ou une cyanobactérie (photobionte). Leurs métabolites secondaires sont des molécules originales appartenant au groupe des depsides, depsidones, dibenzofuranes et présentent un intérêt pour la cosmétique et/ou la pharmaceutique en raison de leur propriété antibiotique, anti-inflammatoire, antioxydant, filtre UV. Nous avons choisi d'étudier le lichen Pseudevenia furfuracea qui est l'un des lichens utilisés en tant que matière première pour la parfumerie et la cosmétique (1900 tonnes / an),

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Ribeiro, Sandra Santos. "Aplicação da irradiação micro-ondas em biocatálise: resolução cinética, redução de cetonas e adição de Michael." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/75/75134/tde-12122014-162825/.

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Neste trabalho foram realizadas reações de resolução enzimática de ciano-hidrinas [(±)-mandelonitrila 1a, (±)-2-(4-clorofenil)-2-hidroxiacetonitrila 2a, (±)-2-hidroxi-2-(4- hidroxifenil)acetonitrila 3a, (±)-2-hidroxibutanonitrila 4a, (±)-2-(4- fluorofenil)acetonitrila 5a, (±)-2-hidroxi-2-(4-metoxifenil)acetonitrila 6a, (±)-2-hidroxi- 2-(3-fenoxifenil)acetonitrila 7a e (±)-(E)-2-hidroxi-4-fenilbut-3-enonitrila 8a] e de álcoois organofluorados [(±)-2,2,2-trifluoro-1-feniletanol ±9a, ±±)-1-(2,4,5- trifluorofenil)etanol 10a, (±)-1-(3-bromofenil)-2,2,2-trifluoroetanol 11a, (±)-1-(4- bromofenil)-2,2

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Ammor, Hassan. "Irradiation microonde des catalyseurs supportes PT, AL : :(2)O::(3) et étude des réactions catalytiques." Nancy 1, 1988. http://www.theses.fr/1988NAN10064.

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Hydrogenolyse du méthylcyclopentane, dans les réactions d'isomérisation des hydrocarbures en C::(6), on en constate que le taux de conversion est toujours plus élevé pour les expériences en microonde que pour les expériences faites en classique. Les distributions en isomères sont identiques dans les deux modes de chauffage, mais on constate la présence de benzène en grande quantité, parmi les produits en réaction

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Pasquet, Virginie. "Recherche bioguidée de molécules anticancéreuses issues de microalgues marines." Phd thesis, Université de La Rochelle, 2011. http://tel.archives-ouvertes.fr/tel-00665228.

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Les organismes marins, dont les microalgues, constituent un champ d'investigation majeur pour la découverte de nouveaux médicaments anticancéreux. Pour mettre en évidence de nouvelles molécules anticancéreuses, nous avons adopté une démarche bioguidée sur des extraits de microalgues marines présentant une activité antiproliférative. Ce travail a conduit à l'isolement de la violaxanthine, pigment caroténoïde époxydé, et à la démonstration de son activité antiproliférative, cytotoxique, pro-apoptotique et pro-nécrotique sur la lignée cellulaire de cancer du sein MCF-7. Des caroténoïdes tels que

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Kong, Na. "Carbohydrate-Functionalized Nanomaterials : Synthesis, Characterization and Biorecognition Studies." Doctoral thesis, KTH, Organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172990.

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This thesis focuses on the development of carbohydrate coupling chemistry on nanomaterials and their biological activity studies. It is divided into two parts: In part one, two carbohydrate immobilization approaches, based on perfluorophenyl azide (PFPA)-functionalized silica nanoparticles (SNPs), are presented, where the binding affinity of the glyconanoparticles was evaluated through carbohydrate-lectin interaction. In the first approach, PFPAfunctionalized SNPs were treated with propargylated glycosides and functionalized under copper-catalyzed azide-alkyne cycloaddition (CuAAC) conditions

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Duarte, Eden Batista. "Processamento de hidroxiapatita por microondas: sÃntese de pÃs e sinterizaÃÃo de peÃas." Universidade Federal do CearÃ, 2009. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=4164.

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FundaÃÃo de Amparo Ã Pesquisa do Estado do CearÃ<br>As biocerÃmicas sÃo substÃncias ou combinaÃÃo de substÃncias que tem aplicabilidade clÃnica, com a finalidade de restituir ou tratar ÃrgÃos, tecidos ou funÃÃes do corpo humano. SÃo quimicamente muito estÃveis e, portanto, pouco provÃveis de induzir uma resposta biolÃgica adversa. As biocerÃmicas mais empregadas na reconstituiÃÃo de tecidos sÃo Ã base de fosfato de cÃlcio, com razÃo Ca/P que varia de 0,5 a 2,0; formando diferentes fases, dentre as quais a mais estudada Ã a hidroxiapatita, cuja composiÃÃo quÃmica Ã semelhante Ã fase inorgÃnica

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Rolihlahla, Bangile Noel. "Electrochemistry and photophysics of carbon nanodots-decorated nigs(Ni(In, Ga)Se2) quantum dots." university of western cape, 2020. http://hdl.handle.net/11394/7309.

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>Magister Scientiae - MSc<br>Currently, non-renewable sources are mostly used to meet the ever-growing demand for energy. However, these sources are not sustainable. In addition to these energy sources being not sustainable, they are bad for the environment although the energy supply sectors highly depend on them. To address such issues the use of renewable energy sources has been proven to be beneficial for the supply of energy for the global population and its energy needs. Advantageous over non-renewable sources, renewable energy plays a crucial role in minimizing the use of fossil fuel and

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Hu, Xiaopei. "Application of Alternative Technologies to Eliminate Vibrios spp. in Raw Oysters." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/25940.

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High pressure processing (HPP) and gamma irradiation were applied to inactivate <i>Vibrio vulnificus</i> (MO624) and <i>Vibrio parahaemolyticus</i> (O3:K6 TX2103) in pure culture and in inoculated live oysters. <i>Vibrio</i> pure culture and inoculated oysters were exposed to pressures of 207 MPa (30 kpsi) to 552 MPa (80 kpsi) for 0 min to maximum of 20 min. More than 5.4 log reductions of <i>V. vulnificus</i> occurred at 345 MPa for 0 min in oysters; 345 MPa for 2 min can achieve 4 log reductions on <i>V. parahaemolyticus</i>. Dosage of 1 kGy gamma-irradiation was proved to be effective in pr

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39

Dago, Camille Déliko. "Développement synthétique d'une nouvelle librairie de 5-arylidène rhodanines sous irradiation micro-onde et d'analogues du SKF-96365 comportant des plateformes pyrazole, rhodanine et leurs évaluations biologiques." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S169.

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Ce travail de thèse a eu pour but la synthèse de nouveaux composés hétérocycliques (rhodanines et pyrazoles) potentiellement actifs sur des protéines kinases, des lignées cellulaires tumorales, les influx SOCE (Store Operated Calcium Entry) et a ciblé principalement comme pathologies la malaria, la leishmaniose et le cancer. La première partie de cette étude a permis la synthèse d'une nouvelle famille de dérivés 5-arylidène rhodanines dissymétriques comportant un bras espaceur diaminé et ce par l'intermédiaire de la technologie micro-onde. Sur les 7 protéines kinases testées avec ces composés,

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Sarkis, Manal. "Les phosphates CDC25 constituent-elles des cibles importantes en cancérologie : Des inhibiteurs de l'activité enzymatique vers les inhibiteurs de l'interaction entre CDC25 et leurs substrats CDK-Cycline." Thesis, Paris 5, 2012. http://www.theses.fr/2012PA05P635.

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Les phosphatases CDC25 sont des éléments-clé de la régulation du cycle cellulaire chez les eucaryotes; elles activent par une double déphosphorylation les complexes CDK/cyclines permettant ainsi la progression dans les différentes phases du cycle. Leur sur-expression, observée dans des cancers très fréquents, est corrélée à une forte agressivité des tumeurs et un mauvais pronostic ce qui en fait des cibles d’intérêt en cancérologie. Deux nouvelles séries d’inhibiteurs ont été développées à partir d’une thiazolopyrimidinone (TZP), capable d’inhiber l’activité des CDC25, et préalablement identif

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Wang, Yantao. "Synthesis and conversion of furfural-batch versus continuous flow." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2474/document.

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Le furfural, identifié comme l'un des 30 principaux produits chimiques biologiques, est une molécule importante en terme de chimie verte et développement durable. L'objectif de ce travail de doctorat est de réaliser la synthèse et la conversion du furfural en flux continu et par lots. Ici, nous avons développé des méthodes plus éco-efficiente pour la synthèse du furfural, et valorisé le furfural en produits à haute valeur ajoutée, tels que le 2-furonitrile, l'alcool furfurylique, etc... Plusieurs questions clés ont été identifiées afin de concevoir des processus plus écologiques que les proces

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Prola, Liziê Daniela Tentler. "Síntese de 3-haloacetil-4-metilquinolinas utilizando líquido iônico sob irradiação de micro-ondas." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/10492.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The synthesis of a series of 3-haloacetyl-4-methyl-quinolines from the cyclocondensation reaction of 4-alkoxyvinyl ketones [R1C(O)CH=C(R2)(OCH3), where R1 = CF3, CCl3, CHCl2, CF2Cl, CF2CF3 and R2 = Me, Et, Pr, Bu, i-Bu, i- Pent] with 2-aminoacetophenone is reported. The reaction was performed in the presence of p-toluene sulphonic acid (p-TsOH), ionic liquid ([HMIM][TsO]) and under microwave irradiation. The molar ratio of the reactants 4-alkoxyvinyl ketone and 2-aminoacetophenone was of 1:1, respectively, for the quinoline with

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43

Palma, Lívia Martins da. "Desenvolvimento de células a combustível de álcoois direta: produção de protótipos de alta potência." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/59/59138/tde-22022016-141625/.

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Neste trabalho investigou-se a oxidação de álcoois (etanol e glicerol) em meio alcalino empregando diferentes catalisadores de metais nobres suportados em carbono Vulcan preparados através da síntese de irradiação de micro-ondas, para aplicação em dispositivos de células a combustível. Neste âmbito, catalisadores suportados em carbono na razão metal:carbono de 40:60 % foram preparados com dois metais nobres: catalisadores a base de Pt(PtM/C, M=Sn, Ru e Ni); e catalisadores a base de Pd(PdM/C, M=Sn, Ru, Ni, Rh, Fe e Mn). Os resultados de EDX revelaram que todos os catalisadores apresentam comp

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Beldjoudi, Nadir. "Interaction ondes electromagnetiques-polymeres : comportement des resines epoxydes sous rayonnement micro-onde continu ou pulse, application aux composites epoxyde/poudre d'argent." Toulouse 3, 1988. http://www.theses.fr/1988TOU30006.

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POTIER, LASNIER SYLVIE. "Augmentation de la duree de conservation d'un aliment a humidite intermediaire : comparaison entre l'atmosphere modifiee et d'autres techniques de conservation, application a la genoise." Reims, 1988. http://www.theses.fr/1988REIMS011.

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Cette patisserie industrielle, d'activite de l'eau fixee a 0,85 est un produit sensible aux alterations microbiologiques et physico-chimiques. Pour la conserver, sans ajouter d'additifs ni modifier sa formulation, plusieurs techniques ont ete testees: le conditionnement sous atmosphere modifiee, l'irradiation, les rayonnements hautes frequences, hyper frequences et infra-rouges. Cette etude a conduit a retenir et optimiser trois techniques aux caracteristiques suivantes: un conditionnement sous atmosphere modifiee, qui comporte une atmosphere interne et un film aux proprietes bien determinees.

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Beck, Paulo Henrique. "Uso de energia microondas na síntese de enonas e de 4,5-diidropirazóis trialometil-substituídos." Universidade Federal de Santa Maria, 2007. http://repositorio.ufsm.br/handle/1/4165.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The solvent-free microwave-assisted regiospecific synthesis of a series of 5-trihalomethyl-4,5-dihydro-1H-pyrazole (7 - 10) from the cyclocondensation of 1,1,1- trihalo-4-alkoxy-3-alken-2-ones (5 - 6),[ CX3COC(R)2=C(R)1OR, where X = Cl, F; R = Me, Et; R2 = H, Me and R1 = H, Me, Et, Pr, iso-Pr, Bu, iso-Bu, tert-Bu, iso - Pen, Ph, 4-Me-Ph, 4-MeO-Ph, 4-NO2-Ph, 4-Cl-Ph, 4-Br-Ph, 4-F-Ph, H, OEt,] with carboxymethyl hydrazine or pentafluorophenyl hydrazine is described. The reaction was performed in a 1:1.2 molar ratio of alken-2-ones

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De, Zordi Nicola. "Modified release of pharmaceutical dosage forms." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7733.

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2010/2011<br>During these three years, the research was focused on the preparation of pharmaceutical solid oral dosage forms with the aim to improve the dissolution behaviors and bioavailability of poor soluble drugs, or preparing sustained release systems for water-soluble drugs. In order to improve the bioavailability of poor soluble drugs, we adopted two strategies: 1) the micronization of the drug to increase their surface area, 2) preparing solid dispersions (SDs) using hydrophilic carrier. As known in the SDs the drug is dispersed or solubilized in an inert excipient or matrix where the

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48

Ambeu, N'ta Christelle. "Synthèse d'analogues de la pentamidine porteurs de plateformes hétérocycliques (rhodanine, benzimidazole, pyrazole et imidazole) et leurs évaluations biologiques." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S137/document.

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Ce manuscrit de thèse concerne le développement d'une stratégie de synthèse multi-étapes de nouveaux composés comportant plusieurs plateformes hétérocycliques (rhodanine, benzimidazole, pyrazole et imidazole) à visée thérapeutique multiple contre la malaria, la leishmaniose, le cancer et les maladies neurodégénératives. Les pharmacomodulations de ces composés ont été élaborées sur la base du modèle de la pentamidine 35 comportant 2 motifs benzamidines (parties « Ouest » et « Est »). En effet, la substitution de sa partie « Ouest » par une plateforme rhodanine ou benzimidazole et de sa partie «

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Vargas, Pâmela Schütz de. "Síntese de 1-aril-4-[(dimetilamino)metileno] pirrolidino-2,3,5-trionas utilizando irradiação de micro-ondas." Universidade Federal de Santa Maria, 2011. http://repositorio.ufsm.br/handle/1/10489.

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Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The synthesis of a series of 1-aryl-4-[(dimethylamino)methylene] pyrrolidine- 2,3,5-trione from the cyclocondensation reaction between b-enaminodiketone [Cl3C(O)C(=CHNMe2)C(O)CO2Et] and aniline derivatives [R = Ph, 3-Me-C6H4, 3- MeO-C6H4, 3-HO-C6H4, 4-Me-C6H4, 4-F-C6H4, 4-Cl-C6H4, 4-Br-C6H4, 4-O2N-C6H4, 4- MeCO-C6H4] was performed. The reaction conditions used to synthesize the pyrrolidine-2,3,5-triones involved environmentally benign techniques, as the use of microwave irradiation, employing the reactants b-enaminodiketone and a

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Lomba, Filho Luiz Gustavo Freddi. "Aplicação de micro-ondas para a produção de pós usados em revestimentos endurecidos por carbonetos de titânio formados durante soldagem com arco elétrico GTAW /." Ilha Solteira, 2019. http://hdl.handle.net/11449/183624.

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Orientador: Juno Gallego<br>Resumo: As superfícies desgastadas são normalmente revestidas com ligas metálicas resistentes ao desgaste abrasivo, nos quais durante a soldagem o metal de solda com matriz ferrosa é reforçado pela formação de carbonetos grosseiros durante a solidificação da poça de fusão. O propósito deste trabalho é investigar a aplicação de micro-ondas para o preparo de cavacos das ligas de titânio ASTM F67 e ASTM F136, visando a sua fragilização pela formação de uma fina camada de carbonetos que facilitam a moagem e a obtenção de pós finos. O pó obtido da reciclagem do titânio f

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