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Dissertations / Theses on the topic 'Hexamethylene'

Author: Grafiati

Published: 3 June 2025

Last updated: 1 August 2025

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1

Schollin, Mårten. "Formulation and Assessment of Hexamethylene-tetramine Filled Solid Fuel Grains." Thesis, KTH, Fiber- och polymerteknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-297507.

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Hybridraketer har inte sett så mycket användning som dess motsvarigheter som använder flytande eller fasta drivmedel. De främsta orsakerna kan förklaras med att hybridraketer historiskt sett haft lägre regressionshastighet och bränsletäthet. Inverkan av nackdelarna har dock minskat tack vare fortsatt forskning rörande hybridraketer. Tillsammans med de säkerhetsoch ekonomiska fördelar som kommer med hybridraketer har gjort hybridraketer ett mer konkurrenskraftiga. Hexaminbaserade fasta bränslen har formulerats och utvärderats med betoning att förbättra härdningstid och mekaniska egenskaper. Gen

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2

張子臣 and Zichen Zhang. "Anticancer effects of hexamethylene bisacetamide on human colon carcinoma cells in vitro." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31239766.

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3

Zhang, Zichen. "Anticancer effects of hexamethylene bisacetamide on human colon carcinoma cells in vitro /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21021065.

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4

Ogunniyi, David. "Hexamethylene-N,N' bis (tert-butyl peroxycarbamate) as a crosslinking agent for elastomers." Thesis, Loughborough University, 1985. https://dspace.lboro.ac.uk/2134/25499.

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The synthesis of a new bisperoxycarbamate based on a reaction between hexamethylene-1,6 diisocyanate and tertiary butyl hydroperoxide was undertaken. In addition, studies were carried out on an earlier research bisperoxycarbamate based on methylene bis(4-cyclohexylisocyanate) and tertiary butyl hydroperoxide. The equation showing the preparation of the new material is shown below: [Equation not shown] The new material - hexamethylene-N,N' bis (tertiary butyl peroxycarbamate) is shown to be able to crosslink a wide range of elastomers, namely -BIIR, NR, SBR, NR/BR, CR, FKM, NBR, Q, ECO, GPO. Ho

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5

Kothari, Jehan. "Synthesis and Thermal Analysis of Hexamethylene Diisocyanate/Polyurea Formaldehyde Core/Shell Self-Healing Microcapsules." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1504803190656406.

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6

劉汝這 and Yue-huen Thomas Lau. "Ultrastructural and stereological investigation of the effects of hexamethylene bisacetamide on human colon carcinoma LoVo cells invitro." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B29872972.

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7

Sivaraman, Karthik R. "Hexamethylene Diisocyanate Homopolymer and Monomer Exposure Assessment and Characterization at an Automobile Manufacturer in the United States." Thesis, University of South Florida, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10144696.

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<p> A variety of paint products are used for their aesthetic and anti-corrosive properties. Isocyanates are consistently found in automobile paint products, particularly in clear coat polyurethane products. Clear coat is typically sprayed via pressurized air by means of an auto-spray robot. In clear coat repair situations, manual, air-powered spray guns are used, and manual spray Operators administer the clear coat material. The isocyanates are a primary anti-corrosive agent in polyurethane products. The Occupational Safety and Health Administration (OSHA) has not established a Permissible Ex

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8

Sivaraman, Karthik Reguram. "Hexamethylene Diisocyanate Homopolymer and Monomer Exposure Assessment and Characterization at an Automobile Manufacturer in the United States." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6392.

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A variety of paint products are used for their aesthetic and anti-corrosive properties. Isocyanates are consistently found in automobile paint products, particularly in clear coat polyurethane products. Clear coat is typically sprayed via pressurized air by means of an auto-spray robot. In clear coat repair situations, manual, air-powered spray guns are used, and manual spray Operators administer the clear coat material. The isocyanates are a primary anti-corrosive agent in polyurethane products. The Occupational Safety and Health Administration (OSHA) has not established a Permissible Exposur

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9

Lau, Yue-huen Thomas. "Ultrastructural and stereological investigation of the effects of hexamethylene bisacetamide on human colon carcinoma LoVo cells in vitro /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22079105.

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10

Guney, Aysun. "Composition-property Relationship Of Pcl Based Polyurethanes." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614253/index.pdf.

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The desirable properties of polyurethanes (PUs) such as mechanical flexibility associated with chemical versatility make these polymers attractive in the development of biomedical devices. In this study, various segmented polyurethanes were synthesized through polymerization reactions between polycaprolactone (PCL) diol or triol and excess hexamethylene diisocyanate (HDI) with varying NCO/OH ratios and the effect of composition on the properties of the resultant polyurethane films were examined. Initially, isocyanate term

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11

Wills, Peter. "Novel biocidal formulation." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/novel-biocidal-formulation(776ed624-6717-496f-9b31-ad2edce8e24b).html.

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In this modern age, society has become much more aware of the danger bacteria can have on people's health. Personal and household antimicrobial formulations are commonly used within the home to lower the levels of harmful bacteria such as E. Coli, Salmonella and Pseudomonas. The active which kills the bacteria within the formulation is described as a biocide. This research looks at the often neglected potential of cationic polyelectrolyte as a biocide, firstly within solution and secondly in creating an antimicrobial surface. The solution properties and antimicrobial activity for a range of co

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12

Mhike, Morgen. "Characterization of Methylene Diphenyl Diisocyanate Protein Conjugates." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1844.

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Diisocyanates (dNCO) such as methylene diphenyl diisocyanate (MDI) are used primarily as cross-linking agents in the production of polyurethane products such as paints, elastomers, coatings and adhesives, and are the most frequently reported cause of chemically induced immunologic sensitization and occupational asthma (OA). Immune mediated hypersensitivity reactions to dNCOs include allergic rhinitis, asthma, hypersensitivity pneumonitis and allergic contact dermatitis. There is currently no simple diagnosis for the identification of dNCO asthma due to the variability of symptoms and uncertain

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13

Fent, Kenneth W. Nylander-French Leena A. "Quantitative monitoring and statistical modeling of dermal and inhalation exposure to monomeric and polymeric 1,6-hexamethylene diisocyanate during automotive spray-painting." Chapel Hill, N.C. : University of North Carolina at Chapel Hill, 2008. http://dc.lib.unc.edu/u?/etd,1490.

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Thesis (Ph. D.)--University of North Carolina at Chapel Hill, 2008.<br>Title from electronic title page (viewed Sep. 16, 2008). "... in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Department of Environmental Sciences and Engineering." Discipline: Environmental Sciences and Engineering; Department/School: Public Health.

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14

Hawke, David H. "Quantitative mass spectrometry: Proteomic analysis of differentiation of MEL cells treated with hexamethylene bisacetamide and 7-[N-(3-aminopropyl)amino] heptan-2-one." Scholarly Commons, 2004. https://scholarlycommons.pacific.edu/uop_etds/2691.

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Polyamines are small, polycationic molecules required for growth and development and found in all living cells. In this study, the effects of two polyamine analogues, hexamethylene bisacetamide (HMBA), a differentiation inducer, and 7-[N-(3-aminopropyl)amino] heptan-2-one (APAH), an inhibitor of N8-acetylspermidine deacetylase, were studied using quantitative proteomics and stable-isotopes. Two new technologies, isotope-coded affinity tags (ICAT) and quantification in fragment spectra using isobaric stable isotope reagents (iTRAQ) were employed and compared. Quantitative results of these exper

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15

Rajagopalan, Vanishree. "Regulation of differentiation of murine erythroleukemia cells by HMBA and its deacetylated metabolites." Scholarly Commons, 2004. https://scholarlycommons.pacific.edu/uop_etds/2643.

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This investigation focused on four aspects of hexamethylene bisacetamide's ( HMBA ) involvement in induction of differentiation in murine erythroleukemia (MEL) cells: (a) Effects of APAH , a N 8 -acetylspermidine deacetylase inhibitor, on differentiation induced by HMBA and its two deacetylated metabolites, NADAH and DAH , (b) influence of APAH on intracellular levels of HMBA and its deacetylated metabolites in HMBA treated MEL cells, (c) Ca 2+ mobilizing effects of HMBA, NADAH and DAH and (d) effect of APAH on HMBA induced changes in c- myc gene expression during differentiation. HMBA (5 mM)

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16

Fazekas-Amphoux, Tünde. "L'héxaméthylène-bisacétamide (HMBA) et les cellules thyroïdiennes humaines et animales en culture : agent de prolifération, agent de différenciation, mode d'action ? : agent de prolifération, agent de différenciation, mode d'action ?" Aix-Marseille 2, 1997. http://www.theses.fr/1997AIX20660.

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17

Ogba, Ndiya. "Transcriptional Regulation Of Estrogen Receptor Alpha Target Genes By Hexamethylene Bisacetamide-Inducible Gene 1 (HEXIM1) And Its Role In Mammary Gland Development And Breast Cancer." Cleveland, Ohio : Case Western Reserve University, 2010. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=case1258406511.

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18

Pholosi, Agnes. "Synthesis, characterization and application of a novel biosorbent-magnetic nanomaterial cross-linked with cyclodextrin using epichlorohydrin and hexamethylene diisocyanate as adsorbents for heavy metals and organics." Thesis, Vaal University of Technology, 2019. http://hdl.handle.net/10352/412.

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D. Tech. (Department of Chemistry, Faculty of Applied and Computer Sciences), Vaal University of Technology<br>In the present era of water resources scarcity, efficient treatment of wastewater is a major prerequisite especially for growing economy. Numerous approaches have been studied for the development of cheaper and more effective adsorbents for removal of both organic and inorganic pollutants from wastewater. The present study seeks to harness the potential of biosorption and nanotechnology by producing more efficient, selective, mechanically stable and effective adsorbents for removal of

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19

Barrandon, Charlotte. "L' échange dynamique de l'ARN 7SK entre le facteur de transcription P-TEFb et les hnRNP." Paris 6, 2007. http://www.theses.fr/2007PA066181.

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L’ARN 7SK est devenu un paradigme d'ARN non codants régulateurs de la transcription. Les années précédentes, notre laboratoire a montré qu’il s’associe à la protéine HEXIM1 et au facteur de transcription P-TEFb (Positive Transcription Elongation Factor b) au sein d’un même complexe. Il en résulte une inactivation du P-TEFb. Ces interactions sont dynamiques, elles sont en perpétuelle formation/dissociation. Des traitements qui inhibent la transcription entraînent la séparation de l’ARN 7SK et du P-TEFb ce qui provoque une accumulation de la forme active de ce dernier. L’ARN 7SK libéré n’est pas

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20

Pöhlmann, Milena. "Thermisch härtende Polymerverbundmaterialien als Basis für neue Befestigungssysteme." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2006. http://nbn-resolving.de/urn:nbn:de:swb:14-1165492370619-99312.

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Mit der Entwicklung und Einführung ökologischer Bauweise im Neubau sowie neuen Baustoffsystemen in Sandwichbauweise wird es zunehmend erforderlich, neue effektive Befestigungsvarianten zu entwickeln, die eine dauerhafte Fixierung auch unter sicherheitstechnischen Bestimmungen sowie aus Garantie- bzw. haftungsrechtlichen Gründen ermöglichen. Die aus der Praxis bisher bekannten chemischen Befestigungssysteme (Zweikomponentenverbundmörtel, Verbundankerpatronen) weisen hinsichtlich der Applikation unter bautechnischen Bedingungen noch einige Nachteile auf. Dazu gehören vor allem längere Aushärtung

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21

Kupka, Vojtěch. "Biodegradabilní polyurethany na bázi polyethylenglykolu." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-216762.

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Predložená diplomová práce se zabývá syntézou biodegradabilních polyuretanu (bio-PU) na bázi polyethylenglykolu (PEG-u) a polykaprolaktonu (PCL) pro využití k medicínským úcelum. Cílem práce bylo vyvinout metodiku prípravy elastomerního polyuretanu, ze kterého by se dal v budoucnu pripravit skafold (nosic bunek) použitelný v tkánovém inženýrství pro humánní regenerativní medicínu. Teoretická cást práce shrnuje informace o materiálech využitelných pro zamýšlenou aplikaci. Zahrnuty jsou také techniky prípravy skafoldu, jejich biokompatibilita a charakterizace vlastností výsledného materiálu. Pra

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22

Lee, Huan-Yi, and 李奐儀. "Study of Poly(trimethylene terephthalate)/Poly(hexamethylene isophthalamide) Blends." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/08363695303152278336.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>91<br>In this study, the poly(trimethylene terephthalate) (PTT)/ poly(hexamethylene isophthalamide) (PA 6I) blends were investigated through differential scanning calorimeter (DSC), polarized optical microscope (POM), wide angle x-ray diffractometer (WAXD), thermogravimetric analyzer (TGA), and scanning electron microscope (SEM). The DSC results showed that two distinct glass transition temperatures (Tg's) existed in the blends. The SEM and POM results indicated the blends exhibited two morphological features, which depended on the composition. According to these

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23

Lai, Jian-Zei, and 賴建志. "Curing Reaction of One-Component Aqueous-Based PU System with Di-Aziridinyl Derivatives from Hexamethylene Diisocyanate." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/13004994349644407724.

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碩士<br>淡江大學<br>化學學系<br>87<br>Title of Thesis: Curing Reactions of One-Component Tolal page: Aqueous-Based PU System With Di-Aziridinyl Derivatives from Hexamethylene Diisocyanate Key Words: aqueous-based PU, aliphatic, aromatic Name of Institute: Tamkang University, Department of Chemistry Graduate date: June, 1999 Degree conferred: Master Name of student: Jian-Zei Lai Advisor: Prof. Kwei-Ju Chen 賴建志陳桂珠 Abstract A di

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24

Spies, Adri. "Assessment of exposure associated health effects to hexamethylene diisocyanate (HDI) in automotive spray painting processes in small,medium and micro enterprises." Thesis, 2006. http://hdl.handle.net/10539/1560.

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Student Number : 0110634H - MPH research report - School of Public Health - Faculty of Sciences<br>During October 1996 to December 1999, isocyanates were the most frequently reported causative agent for occupational asthma cases (16.7% of all cases) submitted to the Surveillance of Work-Related and Occupational Respiratory Diseases in South Africa registry (SORDSA). Occupational disease surveillance registries in other countries also identified isocyanates as the most important occupational sensitiser. Asthma caused by isocyanates exposure may be severe and may persist even after exposure c

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25

Tsai, Hung Kuo, and 蔡宏國. "The Effect of Adding Organoclay on the Physical Properties of Poly(trimethylene terephthalate)/ Poly(hexamethylene isophthalamide) Blends." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/42940242431227688994.

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碩士<br>長庚大學<br>化工與材料工程研究所<br>96<br>Abstract In this study, PTT/PA 6I blends and PTT/PA 6I/clay (nano)composites were prepared by melt-mixed technique. Wide angle x-ray diffractometer (WAXD), differential scanning calorimeter (DSC), thermogravimetric analyzer (TGA), scanning electron microscope (SEM)/energy dispersive spectrometer (EDS), polarized light microscope (PLM), and transmission electron microscope (TEM) were used to characterize the dispersibility of clay in the composites, crystallization behavior, melt behavior, thermal stability, crystal structure, and morphology of the blends/co

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26

Ya-TingHsieh and 謝雅婷. "Microscopic Lamellar Assembly in Poly(L-lactic acid) and Poly(1,6-hexamethylene adipate) Modified with Semicrystalline or Amorphous Polymers." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/766a67.

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27

Carmelo, Miguel Filipe Costa. "Preparação de um sistema de libertação controlada de polihexanida a partir de filmes de quitosano." Master's thesis, 2020. http://hdl.handle.net/10316/92158.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia<br>O uso de pensos curativos tem sido cada vez mais comum no tratamento de feridas superficiais, graças à sua eficiência e comodidade para o utilizador. Este tipo de pensos funciona como um sistema de libertação controlada de fármacos e permite uma cicatrização da ferida mais eficaz e rápida, sem haver necessidade de aplicação de antissépticos e trocas de penso frequentes. Neste trabalho foram preparados hidrogéis à base quitosano, na forma de filme, por evaporação do solvente. Estes filmes

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28

Antunes, Ana Catarina Moreira. "Preparação de hidrogéis para pensos curativos." Master's thesis, 2018. http://hdl.handle.net/10316/98084.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia<br>The efficacy of controlled drug delivery systems depends on the concentration released at the site to be treated for a suitable period of time. Nowadays, there are already some products available in the market that facilitate wound treatment, minimizing the risk of infections and accelerating the healing process. However, wound cleaning and disinfection has to be done several times a day, with frequent dressing changes, which can interfere with the wound healing process. The use of wound

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