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Dissertations / Theses on the topic 'Alkemy'

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Published: 4 June 2021
Last updated: 10 February 2022

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1

Phung, Toan, and Toan Phung@gmail com. "An Historical Based Adaptation Mechanism For BDI Agents." RMIT University. Computer Science and Information Technology, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080515.124049.

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One of the limitations of the BDI (Belief-Desire-Intention) model is the lack of any explicit mechanisms within the architecture to be able to learn. In particular, BDI agents do not possess the ability to adapt based on past experience. This is important in dynamic environments as they can change, causing previously successful methods for achieving goals to become inefficient or ineffective. We present a model in which learning, analogous reasoning, data pruning and learner accuracy evaluation can be utilised by a BDI agent and verify this model experimentally using Inductive and Statistical
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2

Régent, Damien [Verfasser], and Bernhard [Akademischer Betreuer] Breit. "Rhodium-catalyzed intra- and intermolecular alkene hydroacylation = Rhodium-katalisierte Intra- und Intermolecular Alken Hydroacylation." Freiburg : Universität, 2014. http://d-nb.info/1115813811/34.

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3

Bräuner, Maja. "Alkemi och jungiansk psykologi." Thesis, University of Gävle, Ämnesavdelningen för kultur- och religionsvetenskap, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-6707.

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<p>This assignment is a venture into the use of the concept alchemy in the texts on analytical psychology written by Carl G. Jung. Originally the idea was to compare the blending of colours in art painting with the Jungian understanding of alchemy. In order to understand the many and it seems differentiated correlations to alchemy in the texts on analytical psychology written by C.G. Jung, I have found it necessary to investigate the history of alchemy in modern Europe and the Egyptian figure of Hermes Trismegistos. This helps shedding light on Jung’s manner of writing in his texts on analytic
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4

Szuromi, Endre. "Alkene-oxo and alkene-alkene coupling on Pt(II)." Diss., Columbia, Mo. : University of Missouri-Columbia, 2005. http://hdl.handle.net/10355/4156.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2005.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (November 14, 2006) Vita. Includes bibliographical references.
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5

García, Ruiz Víctor M. "Studien zur Anwendung der Olefinmetathese." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=962929832.

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6

Husain, A. H. "Mechanism of alkene epoxidation." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604836.

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Heterogeneous silver catalysed ethene epoxidation is a strategically important selective oxidation giving rise to ethene epoxide a versatile monomer that is largely converted to glycols and used as antifreeze. Several aspects of this commercially important reaction were investigated using electrochemical promotion, a technique which involves electropumping of ions from a solid ion-conducting electrolyte to the surface of a porous catalytically active metal film. The most notable result in this work from ethene epoxidation was the elucidation of the NO<sub>x </sub>promotion effect. It was shown
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7

Hudson, Richard D. A. "Alkenyl-extended cyclohexadienyl complexes." Thesis, University of East Anglia, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309965.

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8

Richardson, Guy Norbury. "#mu#-alkenyl diruthenium chemistry." Thesis, University of Bristol, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260516.

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9

Pullin, Robert David Charles. "Amine-promoted alkene aziridination." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/6939.

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Aziridines, the smallest saturated aza-heterocycle, are not only prevalent in several natural products, but also represent a versatile synthetic tool for the chemist via exploitation of the strained ring system. Research described in this thesis concerns the chemistry of N-N ylides (aminimines), which were utilised in a novel tertiary amine-promoted organocatalytic approach to the aziridination of α,β-unsaturated carbonyl compounds. Through the use of modified conditions two important classes of substrates, dienones and alpha-enolizable enones, both of which had previously shown poor reactivit
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10

Knoke, Stefan. "Video- und elektronenmikroskopische Untersuchungen der Olefinpolymerisation mit trägerfixierten Katalysatorsystemen." [S.l.] : [s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=973585625.

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11

Karlsson, Thomas. "Götisk kabbala och runisk alkemi : Johannes Bureus och den götiska esoterismen." Doctoral thesis, Stockholms universitet, Institutionen för etnologi, religionshistoria och genusstudier, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-37152.

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Gothicism in general, and the Swedish Gothicism in particular, had a close connection to the esoteric currents that were flourishing all over Europe in the Early Modern Period. Apocalyptic predictions and prophecies useful to Gothic propaganda were derived from contemporary esoteric streams, but alongside these came Hermetic and Neo-Platonic speculations of a more individual character that emphasized man’s gradual ascension toward a higher state. The foremost representative for this union of Gothicism and Esotericism was Johannes Bureus (1568-1652). Although a pioneer of runology and Swedish g
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12

Karlsson, Thomas. "Götisk kabbala och runisk alkemi Johannes Bureus och den götiska esoterismen /." Stockholm : Institutionen för etnologi, religionshistoria och genusstudier, Stockholms universitet, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-37152.

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13

Malumbazo, Nandi. "Immobilized catalysts for alkene oxidation." Thesis, University of the Western Cape, 2007. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1206_1257925149.

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<p>Tertiary butyl substituted and unsubstituted Schiff base systems containing N,O donor ligands (Salicylaldimines) with aminotriethoxysilane tail were synthesized and complexed to Copper and Cobalt acetate. In this study, the effect of metal, reaction time, nature of oxidant (hydrogen peroxide tertiary butyl hydroperoxide), substituents on thel igand and substrate concentration, were investigated.</p>
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14

Kölling, Lars. "Neue Diimidochrom(VI)- und Diphosphoraniminatotitan(IV)-Chelatkomplexe metallocen-alternative Katalysatoren für die Olefinpolymerisation /." [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=966024745.

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15

Mahelová, Zora. "Charakterizace chemického složení dehtu po zplyňování biomasy." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2016. http://www.nusl.cz/ntk/nusl-240964.

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Biomass is a renewable source of energy and represents an acceptable alternative to fosil fuels. Usable methods of energetic use of biomass are combustion and gasification. Main interest is focused on gasification in last years. Gasification is based on conversion of organic material to usable gaseous product called syngas, which can be used as a fuel for energy production. Large amount of tar is formed as a by-product of incineration and gasification of biomass. Tar is composed by various mixture of organic substances, has a negative effect on operating conditions and is a potential threat to
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16

Yildiz, Ünveren Hesna Hülya. "Hydroformylation of long chain olefins in microemulsion." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972892109.

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17

Todadze, Ekaterina. "Die silberkatalysierte Gasphasenepoxidation von Alkenen." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=97167017X.

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18

Weingarten, Ulrich. "Homo-, Co- und Terpolymerisation von Ethen, Propen und Dien mit Metallocen-, MAO-Katalysatoren." [S.l. : s.n.], 2000. http://www.sub.uni-hamburg.de/disse/373/Diss.pdf.

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19

Beulich, Inken. "Copolymerisation von Ethen und sterisch anspruchsvollen Olefinen durch Metallocen-Katalysatoren." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=957827113.

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20

Büchner, Michael. "FT-ICR-massenspektrometrische Untersuchungen: Gasphasen-Reaktivität ionisierter Halogenalkene gegenüber Nukleophilen." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960862498.

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21

Reuter, Sebastian. "Katalytische Dihydroxylierung funktionalisierter Olefine in der asymmetrischen Synthese." [S.l. : s.n.], 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=960869107.

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22

Frunzke, Jan. "Quantenchemische Untersuchungen an übergangsmetallkatalysierten Oxidationsreaktionen die Oxidation von Alkenen mit Rutheniumtetraoxid /." [S.l. : s.n.], 2003. http://archiv.ub.uni-marburg.de/diss/z2003/0190/.

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23

Miyagawa, Christian. "Rhodiumkatalysierte Hydroformylierung höhermolekularer Olefine in Mikroemulsionen." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=965381242.

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24

Möller, Klaus. "Entwicklung von neuen Olefin-Polymerisationskatalysatoren für die automatisierte Evaluierung." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=971304335.

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25

Uherek, Elmar. "Laboruntersuchungen der mechanistischen Bildung von Carbonsäuren in der Ozonolyse von Alkenen und ihrer Rolle bei der Aerosolbildung." [S.l. : s.n.], 2003. http://deposit.ddb.de/cgi-bin/dokserv?idn=971569029.

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26

Zipp, Alexander. "Metathese von 1-Buten an Rheniumoxidkatalysatoren." Phd thesis, [S.l. : s.n.], 2005. https://tuprints.ulb.tu-darmstadt.de/568/1/diss_zipp_a.pdf.

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Im Rahmen der Arbeit wurde die Desaktivierung hochaktiver Rheniumoxid-Trägerkatalysatoren (Re2O7/γ-Al2O3) bei der Metathese von 1-Buten zu den Hauptprodukten Ethen und 3-Hexen in flüssiger Phase untersucht. Die Reaktion ist nicht nur im Hinblick auf eine Umsetzung des als Nebenprodukt beim Steam-Cracken anfallenden 1-Butens zu wertvolleren Produkten interessant, sondern ist auch als eine generelle Beispielreaktion für Umwandlung petrochemisch erzeugter Alkene zu sehen (OCT, von engl. Olefin Conversion Technology). Die Untersuchungen wurden in einer speziellen Versuchsapparatur mit einem so gen
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27

Reeves, Jonathan Robert. "Alkene epoxidation using small ring heterocycles." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397377.

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28

Hamid, S. A. "A mechanistic study of alkene hydrogenation." Thesis, University of Cambridge, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.603611.

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The work described in this thesis explores the influence of the nature of transition metals, the electronic properties of ligands and the effect of counter-ions in the regioselectivity of transition metal-hydride addition (hydrometalation) to carbon-carbon double bonds. The method used to investigate the regioselectivity of the hydrometalation was based on the established methodology [Mode a (M<SUP>δ+</SUP> - H<SUP>δ-</SUP>) and Mode b (M<SUP>δ-</SUP> - H<SUP>δ+</SUP>)]. The <I>cis-</I>alkenes were subjected to hydrogenation using deuterium gas. Following the hydrometalation step, the rotation
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29

Rodenhurst, Paul Raymond. "Chemistry of diruthenium #mu#-alkenyl complexes." Thesis, University of Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385308.

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30

Gopalakrishnan, Sandhya. "Electronic spectroscopy of the alkoxy radicals." Columbus, OH : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1051024461.

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Thesis (Ph. D.)--Ohio State University, 2003.<br>Title from first page of PDF file. Document formatted into pages; contains xxiv, 173 p.: ill. (some co.). Includes abstract and vita. Advisor: Terry A. Miller, Dept. of Chemistry. Includes bibliographical references (p. 171-173).
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31

Krug, John P. "The mechanisms of enone-alkene photocycloaddition reactions." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq21299.pdf.

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32

Raymond, Jeffery R. "Exocyclic alkene synthesis via stereoselective radical cyclizations." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq25143.pdf.

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33

Bijpost, Erik Alexander. "Alkene conversions with early transition metal catalysts." [S.l. : [Groningen] : s.n.] ; [University Library Groningen] [Host], 1996. http://irs.ub.rug.nl/ppn/153266457.

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34

Vessey, Jonathan Dennis. "Hydride, alkene and vinyl complexes of ruthenium." Thesis, University of York, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.483971.

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35

Wasseyehun, Kelemu Solomon. "New Metallosupramolecular Assemblies Involving Silver-Alkene Interactions." Thesis, University of Canterbury. Chemistry, 2012. http://hdl.handle.net/10092/7871.

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This thesis describes the silver(I) coordination chemistry of forty two ligands containing alkene functional group. The synthesis of thirty nine ligands is described, fourteen of which were previously unreported compounds. These ligands are classified into three major categories containing allyloxy, diallylamine and allyl groups. The ligands containing allyloxy groups were designed by changing the number of allyloxy arms from one to six, which allows investigation of the influence of the number of allyloxy arms within a ligand on the overall structure of the complex. Ligands containing one all
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36

Turner, Thomas P. W. "Bifunctional unsymmetrical ditopic ligands for alkene methoxycarbonylation." Thesis, University of Bristol, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658207.

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A series of unsymmetrical xylenyl-backboned diphosphine ligands are reported: o-C6H4(CH2ptSU2)(CH2PRR'), R = Ph, R' = 2-Py (L1) and O-C6H4(CH2ptSU2)(CH2PR2), R = 2-Py (L2), R = 2-(3-Me-Py) (L3), R = 2-(4- Me-Py) (L4), R = 2-(6-Me-Py) (Ls) and R = 2-Pyrim (Ls). The ligands have all been characterised by 31p, 1H and 13C NMR spectroscopy and high resolution mass spectrometry. Studies of [PtCI(CH3)(L)] and [PdCI(CH3)(L)] (L = L1-LS) have shown that the favoured isomers have the more strongly a-donating CH3 ligand trans to the bulkier ptSU2 donor. Studies with [PdCI2(L)], [PtCI2(L)] and [Pt(CH3h(L)
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37

Jones, Alexander. "Mechanistic studies of enantioselective alkene bromolactonisation reactions." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24940.

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Asymmetric alkene halofunctionalisation is a vibrant and rapidly expanding field. Several promising organocatalysts have emerged based on privileged binaphthyl phosphoric acid and cinchona alkaloid scaffolds. However, there is still significant potential for improvement. Many catalyst systems are limited in substrate scope and mechanistic understanding. In this thesis we describe the development of asymmetric bromolactonisation reactions catalysed by bis-cinchona alkaloid, (DHQD)2PHAL, as modified by added carboxylic acids. This combination delivers bromolactones with enantioselectivity at a c
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38

Ross, Jennifer Nicola. "Alkoxy- substituted aryl- and benzyl- organotin compounds." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324880.

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New organotin compounds containing alkoxy- functionalities have been prepared. The methods of preparation of the tetraorganotin species have involved three routes. Hydrostannation reactions using triphenyltin hydride have resulted in the synthesis of triphenyltin derivatives of a series of alkoxy- substituted allyl ethers. The addition of tin IV chloride, diphenyltin dichloride and phenyltin trichloride to alkoxy- substituted aryl- and benzyl- Grignard reagents have also been successful. Alkoxy- substituted benzyltin compounds have been prepared by following an alternative preparation of benzy
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39

Reginato, Gloriana. "Asymmetric alkene epoxidation catalysed by chiral metalloporphyrins." Thesis, University of York, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298444.

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40

Wadman, S. N. "Stereoselective alkene syntheses from cyclic enol ethers." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233924.

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41

Daud, Wan Rosli Wan. "The mechanism of alkenyl succinic anhydride sizing." Thesis, Online version, 1988. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.329373.

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42

Williams, Paul John. "Studies on alkene aziridination using 3-acetoxyaminoquinazolinones." Thesis, University of Leicester, 1995. http://hdl.handle.net/2381/33999.

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Oxidation of 3-aminoquinazolinones with lead(IV) acetate in dichloromethane at -20 C gives the corresponding 3-acetoxyaminoquinazolinone. These intermediate 3-acetoxyaminoquinazolinones bring about the aziridination of a wide range of alkenes in good yields. The n.m.r. spectra of these 3-acetoxyaminoquinazolinones shows that there is chirality associated with the acetoxyamino group. Some of the work described in this thesis shows that this chirality arises from retarded rate of inversion at the exocyclic nitrogen on the n.m.r. time scale but that N-inversion at this nitrogen is fast on the tim
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43

Fordred, Paul. "Synthetically useful alkene isomerisation and hydroboration reactions." Thesis, University of Bath, 2012. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558880.

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Upon treatment with a palladium catalyst and hydrogen gas in the presence of caesium carbonate, a wide range of exomethylenic allylic alcohols were found to afford their corresponding trisubstituted isomers. Although hydrogenation was an unavoidable competing pathway, careful monitoring of the reaction progress allowed the desired isomerised products to be obtained in moderate to excellent yields and high (E):(Z) ratios.
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44

Caya, Thomas Charles. "Diastereoselective, Alkoxide-Directed Diborations of Alkenyl Alcohols." Thesis, Boston College, 2014. http://hdl.handle.net/2345/3859.

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Thesis advisor: James P. Morken<br>The metal-catalyzed diboration of alkenes has gained fame as a practical methodology for use in the stereoselective construction of complex organic molecules and synthetic building blocks. The created carbon-boron bonds have tremendous versatility and can easily be manipulated into carbon-carbon or carbon-heteroatom bonds. Unfortunately, metal-catalyzed diborations often suffer from limitations such as substrate specificity. To address these issues, we investigated diboration reactions in the absence of transition-metal catalysts. Herein is presented a transi
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45

Blagbrough, Tamzin C. "Alkene hydrogenation catalysed by dinuclear rhodium complexes." Thesis, Kingston University, 1990. http://eprints.kingston.ac.uk/20533/.

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The work reported in this thesis is concerned with two separated but related studies. The first involved examination of hydrogenation reactions of alkenes, dienes and alkynes using (Rh[sub]2C1(CO)[sub]2(dppm)[sub]2JBPh[sub]4 as a catalyst. Kinetic studies have been performed on the reaction of hexene. The system only well-behaved in the presence of a base, R[sub]3N, where a rst order dependance on both catalyst and hydrogen concentations observed. The order with respect to alkene is of the Michaelis-Menton type. This behaviour suggests that the active catalyst is a neutral monohydride generate
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46

Epton, Jeremy W. "Alkene hydroformylation catalysed by dinuclear rhodium complexes." Thesis, Kingston University, 1990. http://eprints.kingston.ac.uk/20536/.

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47

Galeandro-Diamant, Thomas. "Metal nanoparticles as catalysts for alkene hydrosilylation." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSE1285.

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L'hydrosilylation des alcènes est une méthode cruciale de formation de liaisons carbone-silicium. Elle est utilisée industriellement pour la production de fluides silicones fonctionnels et d'élastomères silicones. Les procédés actuels d'hydrosilylation des alcènes utilisent des complexes de platine comme catalyseurs. Bien que ces complexes soient extrêmement efficients, ils ne sont d'habitude pas récupérés en fin de réaction, ce qui rend leur utilisation coûteuse et peu durable, étant donnée la rareté du platine. Dans ce projet, nous avons synthétisé et testé plusieurs types de nanoparticules
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48

Al-araj, Intisar Qahtan Mahmood. "Synthesis of an α-mycolic acid from Mycobacterium brumae containing a cis-alkene and an α-methyl-trans-alkene". Thesis, Bangor University, 2018. https://research.bangor.ac.uk/portal/en/theses/synthesis-of-an-mycolic-acid-from-mycobacterium-brumae-containing-a-cisalkene-and-an-methyltransalkene(9708072e-3643-4fee-b155-46daea099c90).html.

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Mycolic acids are high molecular weight α-alkyl-branched β -hydroxy long chain fatty acids (60-90 carbon atoms). Different species of Mycobacteria may produce different classes of mycolic acids including α-, methoxy and keto mycolic acids, each present as mixtures of homologues. These may also contain different functional groups such as ester, keto, methoxy, hydroxyl, and alkene groups. Mycolic acids and their trehalose esters are very important components of the mycobacterial cell wall. They show very interesting toxic and immunological properties; these offer considerable potential for appli
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49

Hoff, Dietmar. "Effiziente Katalysatoren für die regioselektive Hydroformylierung von Olefinen zu unverzweigten Aldehyden." [S.l.] : [s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=96833914X.

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50

Steinwascher, Jörg. "Photoinduzierte Elektronentransfer-Aktivierung von Azidanionen in Gegenwart von Alkenen und molekularem Sauerstoff Synthese von [beta]-Azidohydroperoxiden [Beta-Azidohydroperoxiden] /." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=960358404.

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