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Dissertations / Theses on the topic 'Glycan derivatives'

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Published: 14 March 2023

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1

Williams, Matthew. "The development of S-glycosylcysteine derivatives for use in glycan-binding assays." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25655.

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This dissertation concerns the development of a synthetic route towards novel cysteine-based glycan-binding probes, for incorporation into glycoarrays and or similar applications used in assays of glycan-recognition phenomena. The need to systematically characterize the glycome and decipher the range of glycosylation patterns found in living cells, has prompted the development of molecular tools such as glycoarrays and related systems for immobilizing defined carbohydrate structures. The preparation of these probes requires access to building blocks where the core structure has defined glycans
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2

Garg, Monika [Verfasser]. "Conformational Analysis and Application in Diagnostic of Glycosylphosphatidylinositol Glycan Derivatives / Monika Garg." Berlin : Freie Universität Berlin, 2018. http://d-nb.info/1155761057/34.

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3

Puliti, Elisa. "Role of sphingosine 1-phosphate metabolism and signalling in skeletal muscle atrophy and fibrosis." Doctoral thesis, Università di Siena, 2022. http://hdl.handle.net/11365/1195603.

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In the last 30 years, multiple roles of S1P have been demonstrated in the regulation of skeletal muscle biology. The presented study is focused on the role of S1P metabolism in myogenic differentiation, where SPL was found playing a crucial role in regulating S1P cellular levels and responsible for onset of myogenic program. The role of S1P axis was also confirmed in skeletal muscle atrophy induced by TNF-alpha. S1P signalling pathwayplays a crucial role in the development and maintenance of the fibrotic process. New S1P3 antagonists were tested to antagonise the receptor involved in fibrosis,
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4

Gruškienė, Rūta. "Cationized and poly(ethylene glycol) modified chitosan derivatives and nanoparticles." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100702_105158-57314.

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The main aim of this work was to synthesize water-soluble chitosan – methoxy poly(ethylene glycol) (MPEG) graft copolymers and cationized chitosan derivatives of various structure and desirable graft density, and to study their properties. Novel chitosan-MPEG derivatives with different degree of substitution of chitosan were prepared for the first time by “click” chemistry. Several new schemes of the synthesis of chitosan-MPEG and additionally cationized chitosan derivatives were suggested based on protection of amino functionality by using chitosan-dodecyl sulphate complexes. Additional catio
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5

Peters, Scott O. "Induced pi-facial discrimination in the alkylation of chiral derivatives of glycine." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0014/MQ52745.pdf.

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6

Idziak, Irene. "Synthesis of amide-backbone DNA analogues and their poly(ethylene glycol) derivatives." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40145.

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Thymidine dimers 16 and 18, connected by amide or N-methylamide linkages, have been prepared. The dimers were incorporated into normal strands of DNA by solid phase synthesis. Thermal denaturation studies, using complementary single-stranded RNA, indicated that these modifications caused no destabilization of the DNA-RNA duplex.<br>The block synthesis of amide-linked homotetramer 30 is described. The synthesis of the corresponding octamer could not be verified because of lack of solubility. One by one homologation was found to be a suitable method for the preparation of N-methylamide analogues
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7

Carter, James. "A New Synthetic Pathway Towards Legionaminic Acid." Thesis, Griffith University, 2018. http://hdl.handle.net/10072/381511.

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This thesis describes the results of a PhD project aimed at researching a new synthetic pathway towards legionaminic acid analogues. Legionaminic acid is a bacterial family of nonulosonic acids expressed in a terminal position on the flagellar glycans and are considered to be a virulence factor in the pathogenic bacteria that possess them. At the outset of this project several examples of Leg synthesis had been published. Whilst three syntheses of Leg derivatives have been published while the research described in this thesis was being carried out, the potential of all the published syntheses
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8

Bright, Andrew G. "Mechanistic Insights into the Stabilisation of Biopharmaceuticals using Glycine Derivatives. The Effect of Glycine Derivatives on the Crystallisation, Physical Properties and Behaviour of Commonly used Excipients to Stabilise Antigens, Adjuvants and Proteins in the Solid State." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/15943.

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This dissertation has focused on studying the effect of four glycine derivatives on the solid state properties of mannitol, glycine, and sucrose when freeze dried into blended mixtures. The primary goal was to assess their value for use in the stabilisation of vaccines in the solid state, by examining key physical and chemical characteristics, which have been documented to be beneficial to the stabilisation of biopharmaceutical formulations. The novel excipients; dimethyl glycine, and trimethyl glycine, were shown to retard the crystallisation and increase the overall glass transition temperat
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9

Huo, Hongguang. "Tailored cell attachment and cytotoxicity in PEG-based polysaccharide-derivatized hydrogels." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 117 p, 2007. http://proquest.umi.com/pqdlink?did=1253510481&Fmt=7&clientId=79356&RQT=309&VName=PQD.

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10

Bagga, Kishore Kumar. "Synthesis of hexamethylmelamine, polyethylene glycol and glucose derivatives for use in anti-cancer and sugar transport studies." Thesis, Aberystwyth University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301609.

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11

Kaniuga, Michael Brian. "Applicator Exposure to Glycol Derivatives and Total Volatile Organic Compounds during the Application of Spray Polyurethane Foam Insulation." Scholar Commons, 2014. https://scholarcommons.usf.edu/etd/5427.

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There is currently high demand for new building materials which are considered "environmentally friendly" or "green" for both new construction and renovations. Spray polyurethane foam (SPUF) insulation has gained significant acceptance by both consumers and the construction industry due to its high R-value, which results into significant energy savings among other things. Despite its acceptance by consumers and the construction industry, consideration must be given to potential chemical exposures to applicators installing these products. This study sought to determine, through quantitative exp
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12

Tuzcu, Gozde. "2-acrylamido-2-methyl-1-propanesulfonic Acid -methacrylic Acid Copolymer And Its Polyethylene Glycol Methyl Ether Derivatives As Superplasticizers In Concrete." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609380/index.pdf.

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Polymers in concrete have received considerable attention over the past 30 years. Superplasticizers are one of the admixtures which have polymeric structure. In this study, polycarboxylate type slump-releasing dispersant, which is a copolymer of 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS) and methacrylic acid (MAA), was synthesized in different feed compositions. The synthesis procedure of this copolymer was retrieved from literature. The derivatives of this water-soluble copolymer (AMPS-MAA) were synthesized by a macromonomer which was synthesized by the esterification of poly(ethylen
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13

Griveau, Lucie. "Emulsion polymerization in the presence of reactive PEG-based hydrophilic chains for the design of latex particles promoting interactions with cellulose derivatives." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1329/document.

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Dans cette thèse, des particules de polymère fonctionnalisées en surface avec des groupes poly (éthylène glycol) (PEG) ont été synthétisées pour favoriser leur interaction avec les dérivés cellulosique via liaisons hydrogène intermoléculaires. Deux voies de synthèse ont été proposées pour obtenir ses composites cellulose/latex.La première voie est basée sur l'auto-assemblage induit par polymérisation (PISA) pour former des nanoparticules fonctionnalisées avant leur adsorption sur un substrat cellulosique. La PISA tire profit de la formation de copolymères blocs amphiphiles dans l'eau en combin
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14

Zheng, Yuan. "Chemoenzymatic Synthesis of UDP-GlcNAc and UDP-GalNAc Derivatives for Chemoenzymatic Labeling." 2017. http://scholarworks.gsu.edu/chemistry_theses/97.

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Glycans are macromolecules that contain several classes. Glycans can play an important role in biological activities. Studying the cell surface glycans can provide a very powerful way to understand the fundamental process. Also it could help to regulate expected cell response. Thus it is very necessary to have a method to detect cell- surface glycans efficiently. An efficient method for glycan detection is necessary. Metabolic glycan labeling and chemoenzymatic glycan labeling are most commonly used. Chemoenzymatic glycan labeling is a rapid and sensitive method which also has high specificity
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15

Wilkinson, Ian. "Tolerogenic monomethoxypolyethylene glycol derivatives of xenogeneic monoclonal immunoglobulins." 1989. http://hdl.handle.net/1993/16916.

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16

Ching-Hung, Chen, and 陳敬泓. "Preparation and Surface Activity of Propylene Glycol Glycoside Derivatives." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/35076186314222588927.

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碩士<br>國立臺灣科技大學<br>高分子工程系<br>91<br>In this study, propylene glycol glycoside composition was prepared by acid-catalyzed acetalization of glucose with propylene glycol. Then, alkylglycidyl ether with a long alkyl chains having from 8 to 16 carbon atoms were reacted with propylene glycol glycoside to synthesize a series of propylene glycol glycoside derivatives nonionic surfactants. The structure of propylene glycol glycoside derivatives were characterized by FT-IR、1H-NMR and elemental analysis. From the results of the experiments, these propylene glycol glycoside derivatives can displ
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17

Ribeiro, Morais Goreti, Rudi S. Oliveira, and Robert A. Falconer. "Selective synthesis of Neu5Ac2en and its oxazoline derivative using BF3.Et2O." 2009. http://hdl.handle.net/10454/4616.

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No<br>Application of the Lewis acid BF3·Et2O to the selective synthesis of 5-acetamido-2,6-anhydro-3,5-dideoxy-d-glycero-d-galacto-non-2-enonic acid (Neu5Ac2en) and the related oxazoline, methyl 7,8,9-tri-O-acetyl-2,3,4,5-tetradeoxy-2,3-didehydro-2,3-trideoxy-4',5'-dihydro-2'-methyloxazolo[5,4-d]- d-glycero-d-talo-non-2-enonate is described.
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18

Wu, Hsu-Hsuan, and 吳旭軒. "(1) Design and synthesis of (-)-Acaterin derivatives 、(2) Stereoselective Glycosylation of endo-Glycals." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/58041727766066058266.

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碩士<br>中國醫藥大學<br>藥物化學研究所碩士班<br>97<br>The intermediate compounds was synthesized by Baylis-Hillman reaction to couple acetaldehyde and the compound 13. We also used the starting compound 27 followed by reduction and Wittig rection to affored the intermediate compounds (E)-46, (Z)-46. The further works will be finished by Mitsunobu and Grubbs catalysis reaction to give to major compound 23. A new method for synthesis of ??-2-deoxyglycosides from hex-1-en-3-uloses is reported, hex-1-en-3-uloses were shown to be efficient glycosyl donors by using catalyst amount of AlCl3 in microwave-assisted glyco
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19

Chin, Yang Chen, and 楊振欽. "Study on High-Temperature Alcoholysis of Isocyanate Derivatives Using n-Butanol and Ethylene Glycol." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/89172434703332167557.

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碩士<br>國立中興大學<br>化學工程學系<br>89<br>Because of increasing quantity of PU wastes internationally coupling with growing environmental concern for the TDI production tars, current burning and burial methods of dealing with these problems are clearly not acceptable. Since these materials are mostly isocyanate derivatives containing urethane, urea and carbodiimde functionality, this research attempts to find a common chemical solution of dealing with these materials. Our research has been using alcoholysis of PU materials with n-butanol and ethylene glycol to digest the wastes and converted them into l
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20

CHIU, WEI-JEN, and 邱唯禎. "The Determination of Bile Acids And Glycol-Derivatives in Biological Samples With LC-MS/MS." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/48677052683199350216.

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碩士<br>靜宜大學<br>應用化學系<br>104<br>Cholesterol is the major bile acid metabolite. Therefor bile acid concentration abnormality will lead to different types of disease in the human body. For example primary biliary cirrhosis, gallstones, breast cancer, colorectal cancer, etc. Bile acid is also used to treat diseases. Chenodexycholic acid and ursodeoxycholic acid is used to replace the patient surgical treatment of gallstones. In our study, we used liquid chromatography tandem mass spectrometer (LC-MS) to detect trace amounts of bile acids including cholic acid (CA), deoxycholic acid (DCA), lithcholi
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21

Yang, Lun-Cheng, and 楊淪証. "Synthesis of Diethylene Glycol Functionalized Diketopyrrolopyrrole Derivatives Based Side-Chain Conjugated Polymers For Photovoltaic Solar Cells." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/41637032846014352636.

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碩士<br>國立中興大學<br>化學工程學系所<br>103<br>We synthesized four two-dimensional (2-D) conjugated polymers, including diethylene glycol functionalized diketopyrrolopyrrole derivatives PEGA13, PEGA12, PEGA11, and 2-ethylhexyl functionalized diketopyrrolopyrrole derivative PEHA13 featuring thionphene as π-conjugation bridge in the polymer backbones and appending conjugated triphenylamine/thiophene (TPATh) moieties on the side chains. Excellent thermal stability was observed for PEGA13, PEGA12, PEGA11, and PEHA13. Incorporating the thiophene into the polymer backbones and appending TPATh units indused high
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22

Kao, Yu-Hsuan, and 高玉軒. "Synthesis and Characteristics of Polyethylene Glycol Copolymer Using Triphenylamine and Carbazole Derivatives for Perovskite Solar Cells." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/53377727322277315643.

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碩士<br>國立臺灣大學<br>化學工程學研究所<br>103<br>In this study, the diol derivatives of Triphenylamine(TPA) and Carbazole were successfully synthesized and polymerized into polyurethane, then co-polymerized with Polyethylene glycol of various average molecular weights to form copolymers. Triphenylamine molecule is widely used in hole transporting material due to its excellent hole-transporting ability; Carbazole molecule has good hole-transporting ability and relatively higher Highest occupied molecular orbital (HOMO); Ethylene glycol can increase the ion transporting ability. To use these copolymers as hol
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23

Chen, Meng-Chun, and 陳孟群. "Synthesis of Glyco-Arylboronate Derivative on Gold Nanoprobe for Visual Detection of H2O2." Thesis, 2019. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22107NCHU5810007%22.&searchmode=basic.

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碩士<br>國立中興大學<br>生醫工程研究所<br>107<br>The purpose of this study is to develop a colorimetric assay to detect hydrogen peroxide (H2O2) by using arylbronate (AB) derivative functionalized gold nanoparticles (AuNP). H2O2 is one of the important reactive oxygen species (ROS) in the living system. The aberrant production or accumulation of H2O2 is highly related to serious human disease including cancers, neurodegenerative disorders and cardiovascular. The unique optical property of AuNP is applied and designed as a detection probe. The aggregation characteristic of AuNP could be directly observed its
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24

Lin, Zi-Ping, та 林子平. "Synthesis of α-2-Deoxy-ulosides and β-Enaminals Derivatives by Michael Addition of Conjugated endo-Glycals". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/90822838313409505526.

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博士<br>中國醫藥大學<br>藥物化學研究所博士班<br>101<br>α-2-Deoxyulosides were synthesized in moderate to good yields by Michael addition of various O-nucleophiles to hex-1-en-3-ones in the presence of NaOH. These glycosyl additions were complete in 30 min at room temperature with high α-stereoselectivity in 53–92% yield. In addition, high α-stereoselectivity was also observed when S-nucleophiles were examined at 0 oC for 90 min. β-Enaminals were successfully synthesized in good to excellent yields by the reaction of C-2-formylglycals with primary amines. Subsequent reaction with NaBH4 in HOAc led to unexpected
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25

Sie, Cheng-Yan, та 謝承諺. "Behaviors of Ascorbic Acid Derivative/D-α-Tocopheryl Polyethylene Glycol 1000 Succinate (TPGS) Mixtures: Multitechnique Investigation". Thesis, 2013. http://ndltd.ncl.edu.tw/handle/64156997920748818550.

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碩士<br>國立雲林科技大學<br>化學工程與材料工程系碩士班<br>101<br>In this study, we found that compound A can form nanoparticles by a modified ethanol injection method for the first time, In order to improve the stability of compound A nanoparticles, D-α-Tocopheryl polyethylene glycol 1000 succinate (TPGS) was added into compound A nanoparticles. In addition, the effects of polyethylene glycol chain (PEG1000) on compound A dispertions were investigated by compared with mixed A/α-Tocopherol (VE) nanoparticles. Physicochemical characteristics of mixed A/TPGS and A/VE nanoparticles were investigated by multi-techniques
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26

Lin, Pai-Fu, та 林柏甫. "Investigation of mechanical and rheological properties for α-cyclodextrins (α-CDs) /poly (ethylene glycol) PEG polyrotaxanes and its derivatives". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/du2x8x.

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碩士<br>國立臺北科技大學<br>有機高分子研究所<br>96<br>This study focused on the synthesizing of a novel supramolecular structure “polypseudorotaxanes/polyrotaxanes.” The molecular structure was based on α-cyclodextrins (α-CDs)/poly(ethylene glycol) PEG polyrotaxanes. There was no apparent intramolecular bonding in between α-CDs and PEG, only non-covalent bonding such as hydrogen bonding and Van der Waals force were extant. Therefore, crosslink point formed between two α-CDs and it could slide along the PEG chain, thus, this soft and hard chain allows the forming of an elastic material. In addition, polyrotaxane
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27

Wang, Fu-Yu, and 汪富瑜. "Synthesis and Characterization of Dendritic-like Polypropylene Glycol Derivatives Contained Ethyleneimine Groups and Their Use as Protectors for Copper Nanoparticle Preparation." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/ay8na4.

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碩士<br>國立成功大學<br>化學工程學系碩博士班<br>90<br>Abstract In this study, ethyleneimine (EI) group was introduced into polypropylenediamine with different molecular weight by a simple in-situ reaction with 2-chloroethylamine hydrochloride. The EI number (N) of these dendritic-like polymers was determined by 1H-NMR, and the percentages of primary, secondary, and tertiary amines were estimated by potentiometric titration. Then, the measurements of surface tension and the ratio (I1/I3) of intensities of the fluorescence of pyrene for polymer solutions were used to interpret their behaviors in water. The chela
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28

KUO, YUAN-TSUNG, and 郭原宗. "Kinetic Studies of Type II Photoinitiator Photopolymerization Based on 2-Chloro-hexaarylbimmidazole (o-Cl-HABI)/N-Phenyl glycine (NPG) and Its Derivatives." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/27mms6.

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碩士<br>國立高雄應用科技大學<br>化學工程與材料工程系博碩士班<br>106<br>Type II photoinitiator systems are widely used in photocuring processes due to their low cost, faster photospeed which applied in many industrial applications such as photoresist dry film and imaging. One of the typical Type II photo-initiator package based on o-Cl-HABI (hydrogen acceptor) and NPG (hydrogen donor) systems (where o-Cl-HABI is a 2-chlorohexaaryl biimidazole, NPG is an N-phenyl glycine) was investigated in this study. The photocuring behavior for different weight ratios of o-Cl-HABI and NPG was studied through FT-IR, gel-fraction, elec
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