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Dissertations / Theses on the topic 'Asymmetry of development'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Namigai, Erica. "Asymmetry in spiralian development." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:735a9eaa-4942-4339-af8f-30bd100b2679.

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In animal development, how an animal builds its body has been a fundamental and central question. Spanning different fields, we have a good understanding of how animals build their body axes (anterior-posterior, dorsal-ventral) and this understanding is now a routine concept when learning about animal development. There are a number of mysteries left when considering early development, and the establishment of left-right (LR) asymmetry remains one of them. One key problem is how initial symmetry is broken early in animal development and how this translates into molecular asymmetry. Our lack of

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2

Shalpegin, Timofey. "Collaborative Product Development under Information Asymmetry." Thesis, Jouy-en Josas, HEC, 2015. http://www.theses.fr/2015EHEC0007/document.

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Les premières phases de conception de produit sont très importantes pour le développement de produits à succès, parce que jusqu'à 90 % des coûts des produits sont verrouillés durant les phases de concept et d'ingénierie. Lors de ces phases, les entreprises impliquent activement leurs fournisseurs à participer au développement du produit. Cependant, la littérature académique n'a pas accordé suffisamment d'attention au lien entre le stade de l'implication des fournisseurs précoce et le stade de production en série subséquente. Les objectifs de l'entreprise, qui développe le nouveau produit, et s

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3

Bellomo, Daniela. "Development of heart asymmetry in the mammalian embryo." Thesis, St George's, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243987.

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4

Regan, Jennifer Claire. "FGF-signalling and the development of CNS asymmetry in zebrafish." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1446056/.

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Neuroanatomical and functional asymmetries are a widespread, probably universal, feature of the vertebrate nervous system. Although brain asymmetry is a fundamental characteristic of the CNS, how it is established is not known. The epithalamus is a subdivision of the diencephalic region of the forebrain and structural asymmetries in this region are widespread among vertebrates. The epithalamus of the zebrafish shows differences between the left and right sides in terms of neuronal organization, connectivity and gene expression and has become a focus for the study of establishment and elaborati

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5

Kenny, Nathan James. "The evolution and development of left/right asymmetry in the Lophotrochozoa." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:f76480f3-a78b-4778-812b-e956a383d63d.

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Left/right (L/R) asymmetries, differences in morphology between the otherwise mirrored left- and right-hand sides of the body, are found in animals across the Bilateria. For many years it was thought that the mechanisms for establishment of these asymmetries had evolved separately in the three superphyla that constitute the Bilateria, but the discovery in 2009 that the TGF-beta ligand Nodal shares a conserved role in the Deuterostomia and Lophotrochozoa has re-ignited debate and interest in this field. In this thesis, work examining the establishment and maintenance of L/R asymmetries in the l

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6

Curran, Lorna L. "Examining the Role of Latitude and Differential Insolation in Asymmetrical Valley Development." Thesis, University of North Texas, 2013. https://digital.library.unt.edu/ark:/67531/metadc283821/.

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Valley development through erosional processes typically tends to create symmetrical valleys. Over time, water cuts through the substrate to create valleys, gorges, and canyons for which the sides are the valley are evenly sloped. However, there are anomalies to this process. Asymmetrical valleys have been well-documented even in areas of uniform substrate or little tectonic uplift. One proposed explanation for the asymmetry of these valleys is differential insolation. This may lead to different microclimates from one slope to another which alter the rate and extent of erosion. Since the d

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7

Wright, Donald John. "International technology transfer with an information asymmetry and endogenous research and development." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29321.

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This thesis developed a partial equilibrium model of international technology transfer in which the extent of technological change and the mode of technology transfer were endogenous. This endogeneity was obtained by explicitly considering the problem faced by a monopolist that was trying to lower production costs by undertaking research and development and was trying to maximise global profit by transferring technology abroad. The modes of transfer considered were (1) the export of goods, (2) production abroad in a wholly owned subsidiary, and (3) licensing a foreign producer. A fixed cost wa

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8

Bondar, Carin Anne. "Development of asymmetry in two caenogastropods, a test of the torsion hypothesis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ62549.pdf.

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9

Diaz, Anjolii. "Temperament Differences in Fear Reactivity in Infancy: Frontal EEG Asymmetry and Recognition Memory." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/77024.

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Findings that relate cognition and negative affect are not very consistent. However, according to Lazarus (1982) cognitive processes are key to the development and expression of emotions. This study examined the relations between temperament fear reactivity and visual recognition memory at ten months of age. Both behavioral and physiological measurements of fear reactivity and recognition memory were examined in order to further the understanding of temperamental fear in infancy, the relationship temperamental fear reactivity holds with visual recognition memory, and the development of prefron

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10

Swan, Andrew. "Initiation of developmental asymmetry by Drosophila Bic-D, DLis-1 and microtubules." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0021/NQ55384.pdf.

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11

Owoade, Abbas. "ENTREPRENEURIAL ECOSYSTEM DEVELOPMENT : LEARNING FROM SUCCESSES." Thesis, KTH, Entreprenörskap och Innovation, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-190619.

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The strengthening of the entrepreneurial landscape has been viewed as a means to national economic growth, wealth creation as well as job creation. Good examples exists where government deliberate actions have contributed to these kind of positive growth, yet this research exposes the rigour and hard work needed to bring about this success. The rigour stems from the pursuit of a holistic approach which involves the strengthening of the six domains of entrepreneurship ecosystem growth as posited in literature, while the hard work is related to the discipline and expertise required to pilot such

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12

Borg, Carl-Johan. "Mechanisms controlling valley asymmetry development at Abisko, northern Sweden and Sani Pass, southern Africa." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179985.

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Abstract The main goal of this study is to examine mechanisms controlling valley asymmetry development at two locations with distinctly differing environmental parameters and to develop a model for the two locations. As a secondary aim the knowledge gained from the main goal is thought to help understand the very uncertain glacial past of the high Drakensberg as it can be compared to the much accepted glacial history of Abisko. Parameters studied were slope angle, landforms, vegetation cover, block abundance, available moisture, bedrock characteristics, temperature and soil moisture. Some para

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13

Martin, Sarah Abigail. "Expression of fluctuating asymmetry in primate teeth: Analyzing the role of growth duration." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366187797.

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14

Jansen, Sanne, and Alina Milbradt. "The influence of breast asymmetry on the product development of bras : A mixed methods research." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-22070.

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Background: The fashion world is increasingly aware of different body types and becomes more diverse every year. However, breast asymmetry, which is highly common among women with a rate of 88 percent, is not addressed by the fashion industry at all. Current advertisements of lingerie brands mainly support a flawless, slim and symmetrical body type. This beauty standard seams not in accordance to the high rate of affected women with breast asymmetry. Moreover, there are several factors which are negatively influenced by breast asymmetry, such as a failing weight support of the bra, an asymmetr

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15

Gray, Sarah Lauren. "Down Regulation of Muscle Strength Genes in Orthognathic Surgery Patients with Asymmetry." Master's thesis, Temple University Libraries, 2015. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/316137.

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Oral Biology<br>M.S.<br>Objective: Genetic loci for ATP2A2 kinase, NUAK1, and phosphatase PPP1CC are associated with skeletal muscle strength phenotypes. ATP2A2 is a calcium ion transport ATPase in sarcoplasmic reticulum that is predominantly expressed in cardiac and slow-twitch fibers. NUAK1, an AMP-activated protein kinase, and PPP1CC, a subunit of protein phosphatase 1, are involved in glycogen metabolism during skeletal muscle contraction. The aim of this study is to investigate whether these genes are associated with masseter muscle composition and function in the development of skeletal

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16

Hayden, Angela Nicole. "THE ROLE OF RACIAL INFORMATION IN INFANT FACE PROCESSING." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/54.

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The present research addressed the development of specialization in face processing in infancy by examining the roles of race and emotion. An other-race face among own-race faces draws adults’ attention to a greater degree than an own-race face among other-race faces due to the “other-race” feature in other-race faces. This feature underlies race-based differences in adults’ face processing. The current studies investigated the development of this mechanism as well as the influence that this mechanism has on emotion processing in infancy. In Experiment 1, Caucasian 3.5- and 9- month-olds exhib

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17

Stewart, Joel B. "Development of yield criteria for describing the behavior of porous metals with tension-compression asymmetry." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024779.

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18

Inglis, Rachael Mary Foster. "Characterisation of novel genes and mechanisms that influence the development of left-right asymmetry in zebrafish." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708043.

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19

Quinn, Simon R. "Bank credit and legal status in Moroccan manufacturing." Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:999e2006-bd8e-4902-9bd9-3c0d08f41e46.

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Moroccan manufacturing firms generally choose to incorporate under one of two legal forms: ‘Société Anonyme’ (SA) and ‘Société À Responsibilité Limitée’ (SARL). This thesis is about that choice and its consequence for firms’ access to bank overdraft facilities. In 2001, Morocco made a radical change to its company law regime: it replaced a company law dating from 19th-century France with modern standards of corporate governance and accountability. In Chapter One, I use the two-period FACS/ICA panel to analyse that reform and to evaluate its impact upon manufacturing firms’ access to bank credi

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20

Thompson, Helen. "The development of cilia on the Ciona intestinalis embryo and the evolution of chordate left-right asymmetry." Thesis, University of Oxford, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558332.

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Most multicellular organisms have body plans that exhibit an element of symmetry; either radial or bilateral symmetry. Bilateral symmetry refers to organisms which have a single plane of symmetry with each side a mirror image of the other. Although externally these species appear symmetrical, internally, the organs are positioned in an asymmetric manner. This left-right axis is the last axis established after the A-P axis and D- V axis and recent research has analysed how this asymmetry is established. In the mouse it has been shown that monocilia on the organiser region, the mouse ventral nod

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21

Aarnivala, H. (Henri). "Deformational plagiocephaly:prevalence, quantification and prevention of acquired cranial asymmetry in infants." Doctoral thesis, Oulun yliopisto, 2017. http://urn.fi/urn:isbn:9789526215488.

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Abstract The recommendation for infants to sleep supine has decreased the incidence of sudden infant death syndrome by more than a half, but as another consequence, a dramatic rise has been observed in the incidence of acquired cranial asymmetry (deformational plagiocephaly, DP). According to recent data, almost half of otherwise healthy infants are affected by some degree of DP at 7 to 12 weeks of age, and especially in the USA and some Central European countries, major effort is put into treatment of severe DP. However, little is known of the prognosis of DP in the absence of intervention, a

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22

Zoran, Milić. "Efekti programa razvojne gimnastike uz dodatno vežbanje sa roditeljima na mišićne disbalanse, morfološke karakteristike i koordinaciju dece predškolskog uzrasta." Phd thesis, Univerzitet u Novom Sadu, Fakultet sporta i fizičkog vaspitanja u Novom Sadu, 2019. https://www.cris.uns.ac.rs/record.jsf?recordId=110743&source=NDLTD&language=en.

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Adaptirana i indikovana fizička aktivnost u aktuelnom i stihijskom životu, kakav dana&scaron;nji čovek vodi, posmatra se kao neraskidivi deo svakodnevnog funkcionisanja.  Pažljivo odabrana, i na adekvatan način   primenjena, fizička aktivnost daje svoje pozitivne doprinose antropolo&scaron;kom prostoru čoveka. U dečijem uzrastu, fizička aktivnost je značajan faktor koji utiče na mnoge aspekte pravilnog  rasta i razvoja. Motorički prostor, i prostor koji se odnosi na posturalno stanje u smislu mi&scaron;ićnih asimetrija, su samo neki od segmenata dečijeg razvoja. Uključenost

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23

Van, der Holst Marieke. "EPA negotiations between the EU and SADC/SACU grouping: partnership or asymmetry?" Thesis, Stellenbosch : University of Stellenbosch, 2009. http://hdl.handle.net/10019.1/1931.

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Thesis (MA (Political Science. International Studies))--University of Stellenbosch, 2009.<br>Europe and Africa share a long history that is characterized both by oppression and development. The relationship between the European Union (EU) and the African, Caribbean and Pacific (ACP) countries is a particularly important aspect of EU development cooperation policy. The developmental history between the EU and Africa started with the Yaoundé Conventions of 1963 and 1969, which were replaced by the Lomé Convention. Unfortunately, the favourable terms and preferential access for the ACP count

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24

Pereyra, Martin. "Growth and volatility in inter- and intra-national data." Diss., Columbia, Mo. : University of Missouri-Columbia, 2008. http://hdl.handle.net/10355/5551.

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Thesis (Ph. D.)--University of Missouri-Columbia, 2008.<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 June 11, 2009) Vita. Includes bibliographical references.

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25

Lepistö, Felix, and Niklas Hansson. "Visuell asymmetri i spel : Speldesign med olika verklighetsuppfattningar i fokus." Thesis, Blekinge Tekniska Högskola, Institutionen för teknik och estetik, 1993. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-12705.

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Genom detta kandidatarbete prövar vi på att testa ett annorlunda tillvägagångssätt inom spelutveckling och design, till att försöka skapa en mer innovativ och tilltalande spelprodukt. Med hjälp av termen Critical Play från Mary Flanagan, undersöker vi genom reflektion, diskussion och ifrågasättande, alternativa sätt att tolka världen på. Genom prövning skapar vi en underhållande gestaltning och analyserar ifall Critical Play som utveckling och designmetod även går att applicera tillsammans med teorier från medvetandefilosofi i åtanke. Vi ser möjligheter i att föra fram en avvikande spelupplev

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26

Lor, Stephanie [Verfasser], Onur [Gutachter] Güntürkün, Carsten [Gutachter] Theiß, and Giorgio [Gutachter] Vallortigara. "Mechanisms of light-induced neuronal asymmetry during embryonic development / Stephanie Lor ; Gutachter: Onur Güntürkün, Carsten Theiß, Giorgio Vallortigara ; International Graduate School of Neuroscience." Bochum : Ruhr-Universität Bochum, 2020. http://d-nb.info/1202609007/34.

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27

Макаренко, Інна Олександрівна, Инна Александровна Макаренко, Inna Oleksandrivna Makarenko та Д. В. Погорілий. "Рейтинги компаній на ринках відповідального інвестування як інструмент мінімізації інформаційної асиметрії в умовах сталого розвитку". Thesis, ХТЕІ КНЕУ, 2017. http://essuir.sumdu.edu.ua/handle/123456789/66184.

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Індекси відповідального інвестування на сьогодні виступають важливим інструментом мінімізації інформаційної асиметрії між компаніями та інвесторам серед інших рейтингів сталого розвитку. Їх ключова риса – нейтралізація несприятливого відбору та моральних ризиків між за рахунок використання ESG –критеріїв.<br>Indicators of responsible investing today are an important tool for minimizing information asymmetry between companies and investors among other sustainable development ratings. Their key feature is the neutralization of unfavorable selection and moral hazard with using ESG-criteria.

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28

Errangi, Bhargav Kumar. "Development and application of comparative diffusion tensor imaging (DTI) to examine cross-species differences in the hemispheric asymmetry and age-related decline of brain white matter." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/44919.

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A complete scientific understanding of human nature requires delineation of the neurobiological characteristics underlying the unique features of the human mind. This effort can be facilitated by comparing the human brain with the brains of other living primate species. Humans are more susceptible to neurodegenerative diseases than other primate species, including our closest living primate relatives, the chimpanzees. Comparing age-related changes in brain structure between humans and non-human primates could, therefore, potentially shed light on the neurological basis of this human vulnerabil

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Ільченко, С. В. "Умови оцінювання асиметрії розвитку ринку транспортних послуг". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65865.

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Одним з ключових пріоритетів укріплення позицій держави на світових ринках у переважній більшості розглядається розвиток транспортної сфери, ступінь й ефективність її залучення у процеси обміну. Неоднорідність світового ринку транспортних послуг, як і вторинність попиту на них – фактори, які формують архітектуру сфери транспорту у глобальних масштабах.

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Макаренко, Інна Олександрівна, Инна Александровна Макаренко, Inna Oleksandrivna Makarenko, Юлія Василівна Єльнікова, Юлия Васильевна Ельникова та Yuliia Vasylivna Yelnikova. "Принципи рейтингування на ринках відповідального інвестування як запорука інформаційної прозорості". Thesis, Сумський державний університет, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65753.

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Питання формування базису для рейтингування на ринках відповідального інвестування лежить в площині подальшого удосконалення системи принципів створення та присвоєння рейтингів сталого розвитку як важливого етапу у розбудові конкурентного та прозорого ринкового середовища<br>Вопросы формирования базиса для рейтингования на рынках ответственного инвестирования лежит в плоскости дальнейшего совершенствования системы принципов создания и присвоения рейтингов устойчивого развития как важного этапа в развитии конкурентного и прозрачного рыночной среды<br>The issue of forming a basis for rating in t

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Guerra, Rodríguez Almary Victoria [Verfasser], Sven [Akademischer Betreuer] Reischauer, Didier Y. R. [Akademischer Betreuer] Stainier, Didier Y. R. [Gutachter] Stainier, and Virgine [Gutachter] Lecaudey. "The role of the homeobox transcription factor Meis2b in zebrafish heart development and asymmetry / Almary Victoria Guerra Rodriguez ; Gutachter: Didier Y. R. Stainier, Virgine Lecaudey ; Sven Reischauer, Didier Y. R. Stainier." Frankfurt am Main : Universitätsbibliothek Johann Christian Senckenberg, 2018. http://d-nb.info/1168722810/34.

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Teixeira, Maria Cândida Tocci. "Preferência podal e assimetrias interlaterais de desempenho na tarefa de chutar em crianças." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/39/39132/tde-25062007-102110/.

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O objetivo desse estudo foi analisar a preferência podal e assimetrias interlaterais de desempenho no chute de potência em crianças. Vinte e quatro meninos praticantes de futsal foram divididos em três grupos etários: seis, oito e 10 anos. A análise da preferência podal foi realizada por meio da observação da preferência de uso por uma das pernas em diferentes tarefas motoras, classificadas nas categorias: estabilização, mobilização geral (sem relação com tarefas do futebol) e mobilização específica (tarefas relacionadas ao futebol). A análise da assimetria de desempenho foi feita em função de

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33

Cruz, Benedito Ely Valente [UNESP]. "O alvorecer das indicações geográficas na Amazônia: a 'corrida' pela IG do queijo artesanal do Marajó/PA." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/151138.

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Submitted by BENEDITO ELY VALENTE DA CRUZ null (bvalente7@yahoo.com.br) on 2017-07-15T20:46:55Z No. of bitstreams: 1 TESE 15 - Fim.pdf: 19905198 bytes, checksum: a69ea9ef2e8be735284a330a434140f8 (MD5)<br>Approved for entry into archive by Luiz Galeffi (luizgaleffi@gmail.com) on 2017-07-18T20:51:37Z (GMT) No. of bitstreams: 1 cruz_bev_dr_prud.pdf: 19905198 bytes, checksum: a69ea9ef2e8be735284a330a434140f8 (MD5)<br>Made available in DSpace on 2017-07-18T20:51:37Z (GMT). No. of bitstreams: 1 cruz_bev_dr_prud.pdf: 19905198 bytes, checksum: a69ea9ef2e8be735284a330a434140f8 (MD5) Previous iss

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Ibrahem, Ismail. "Development of organocatalytic asymmetric transformations /." Stockholm : Department of Organic Chemistry, Stockholm university, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-7112.

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35

Jolley, Katherine E. "Development of catalysts for asymmetric hydrogenation." Thesis, University of Warwick, 2013. http://wrap.warwick.ac.uk/58275/.

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The application of tetradentate aminoalcohol ligands to the KOtBu-catalysed hydrogenation of benzophenone has been studied. Hydrogenation was found to proceed via a transfer hydrogenation process with the ligands acting as hydrogen donors. A series of bidentate and tetradentate ligands containing a variety of coordinating groups including amino, hydroxy, silyl, phosphine and amido functionalities have been prepared and applied to the transition metal-catalysed asymmetric transfer hydrogenation of ketones using iron, ruthenium and rhodium metals although none were found to be enantioselective f

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James, Samantha N. "Design and Development of Asymmetric Organocatalysts." Thesis, Griffith University, 2014. http://hdl.handle.net/10072/367034.

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This thesis describes the design and synthesis of a new class of hydrogen bonding organocatalysts. After various synthetic strategies were investigated, a convenient two-step process, involving an amide coupling followed by borane reduction of the resulting N-acylsulfonamide, resulted in the formation of the targeted racemic 1,5-bis-sulfonamides. This synthesis also provided access to a second series of potential organocatalysts, the N-acylsulfonamides. The catalytic ability of both libraries of racemic compounds was tested in Friedel-Crafts type reactions of N-methyli

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Yang, Aiming. "Bilateral Asymmetry in Chickens of Different Genetic backgrounds." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30532.

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The dissertation consists of a series of experiments conducted to study developmental stability of various genetic stocks at different stages in the life cycle. The primary measures of stability were type and degree of asymmetry of bilateral traits and heterosis. Higher relative asymmetry (RA), which was defined as (|L-R| / [(L+R)/2]) x 100, was observed in lines of White Leghorns selected 23 generations for high or low antibody response to sheep red blood cells than in their F1 crosses. The bilateral traits were 39-day shank length and length and weight of the first primary wing feather. Sha

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Storm, Rebecca A. "Human skeletal asymmetry. A study of directional and fluctuating asymmetry in assessing health, environmental conditions, and social status in English populations from the 7th to the 19th centuries." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4325.

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Volume 1 = Thesis, Volume 2 = Appendices<br>Asymmetry is a useful tool for osteological analysis as it detects disruptions in the developmental stability of osseous structures attributed to environmental and biomechanical environments. The primary aim of this study is to establish a baseline for normal levels of asymmetry in English archaeological populations in order to distinguish between normal population variation and increased developmental instability or biomechanical stress. Directional and fluctuating asymmetry is assessed through a database of a comprehensive selection of osteological

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Green, Stuart D. "Combinatorial approaches to catalysts for asymmetric oxidation." Thesis, University of Newcastle Upon Tyne, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327227.

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Parra, Guillaume. "Towards the development of asymmetric 6Pi electrocyclisations." Thesis, University of Nottingham, 2014. http://eprints.nottingham.ac.uk/14196/.

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The biosynthesis of the superfamily of pyrones such as (+)-tridachione, (-)-crispatone or tridachiahydropyrone have drawn much attention. However, the isolated natural products are enantiomerically pure whereas the syntheses of these natural products were completed in racemic form. This raises the question of where, in nature, the chirality is derived from. It has been hypothesized that the all (E)-polyene tridachiahydropyrone precursor is present in the membrane of the producing mollusc, and during the reaction the membrane provides a favourable chiral environment for obtaining only the trida

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Essat, Munira. "Development of the asymmetric amino-cope arrangement." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/12661.

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The research described in this thesis is aimed at demonstrating the synthetic utility of the asymmetric amino-Cope rearrangement and highlight its potential for future application in natural product synthesis. Using the recently developed asymmetric anionic amino-Cope methodology, rearrangement of diasteromerically pure 3-amino-l,5-hexadiene substrates provided the target aldehyde in good yield and with high levels of asymmetric induction (up to 94% e.e.). The aldehyde obtained was used for the successful formation of2,4-disubstituted lactones with no apparent loss of stereochemical integrity.

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Lindsay, David Montgomery. "Development of the asymmetric Pauson Khand reaction." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248568.

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Jenkins, Kerry. "Development of dynamic resolutions for asymmetric synthesis." Thesis, University of Sussex, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241636.

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Yao, Li. "Development of catalytic asymmetric allylation of dienone." Thesis, Boston College, 2008. http://hdl.handle.net/2345/1350.

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Thesis advisor: James P. Morken<br>The catalytic allylation of aldehydes, ketones, and imines is a very useful reaction for the formation of a new carbon-carbon bond in synthetic organic chemistry. There have been several successful reports of catalytic asymmetric reactions that use aldehydes as the substrate. However, there have been very few successful examples with ketones. Herein, a nickel-catalyzed allylation of dienones with the pinacol ester of allylboronic acid is presented. Based on 3,3’-reductive elimination, the relationship between the dienone structure and 1,2- and 1,6-regioselect

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Müller, Tim. "Development of asymmetric gears with Creo Simulate." Technische Universität Chemnitz, 2018. https://monarch.qucosa.de/id/qucosa%3A21514.

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Grundgedanke: • Erhöhung der Tragfähigkeit der Verzahnung (Flanke, Fuss) durch ein asymmetrisches Bezugsprofil Umsetzung: • Aufbau eines parametrischen FE-Zahnradmodells für asymmetrische Verzahnungen in Creo Simulate • Automatisierte FE-Simulation einer Vielzahl an Lösungsvarianten mit Multiziel-Konstruktionsstudie • Auswertung der Ergebnisse mit Hilfe einer Nutzerwertanalyse • Zeichnungserstellung und Fertigungsbetreuung Potenziale: • Reduzierung der Verzahnungsbreite um ca. 10%

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Pujol-Santiago, Alba. "Development of novel catalytic asymmetric diborylation methodologies." Thesis, Durham University, 2017. http://etheses.dur.ac.uk/12161/.

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This thesis describes the study of the β-borylation reaction on different types of electron deficient substrates as well as the application of the methodologies herein developed into the synthesis of a key intermediate for cholesterol-lowering drug Atorvastatin. Within the frame of the use of organoboron compounds in organic synthesis, the literature review presented in the first section after a brief introduction on organoboranes is focused on the different strategies for their synthesis via boron addition, specially the β-borylation reaction. Different aspects of the reaction are covered; en

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Parekh, Parag A. "Bioprocess development for asymmetric reductions by Saccharomyces cerevisiae enzymes." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014371.

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Mallard, Samantha. "Fluctuating asymmetry and reproduction in the field crickets Gryllus bimaculatus and Gryllodes sigillatus." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251966.

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Yang, Jinchao. "Development and application of bifunctional iminophosphorane organocatalysts." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:fa250f43-ab91-4aec-9fa3-f6ccdb444bb5.

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This thesis presents the development and application of bifunctional iminophosphorane (BIMP) organocatalysts, incorporating a triaryl-substituted iminophosphorane organosuperbase for organocatalytic enantioselective reactions. Chapter 2 describes the design and synthesis of a new class of BIMP catalysts and its application in the first organocatalytic enantioselective sulfa-Michael reaction of alkyl thiols to unactivated β-substituted α,β-unsaturated esters. The conjugate adducts were obtained in up to 94% yield and 94% ee. In addition, the reaction was performed on a 1 gram preparative scale

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Cavell, Alexander. "Developments in chiral counterion-directed asymmetric reactions." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:70094e28-5c28-47b2-b828-30315a6e0c42.

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The research outlined herein consists of two projects, each relating to the investigation and development of asymmetric phase-transfer catalysed reactions. The aim of the first project was to develop a two-component cascade reaction that would assemble the valuable pyrroloindoline framework from simple and readily available starting materials, namely an isocyanide-containing substrate and a Michael acceptor. Successfully, we were able to synthesise a variety of pyrroloindolines containing up to three stereocentres with excellent diastereo- and enantioselectivity. This rapid strategy uses a chi

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