Log in

Relevant bibliographies by topics / Chemical engineering|Chemistry / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Chemical engineering|Chemistry.

Dissertations / Theses on the topic 'Chemical engineering|Chemistry'

Author: Grafiati

Published: 9 July 2021

Last updated: 29 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Chemical engineering|Chemistry.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Singhvi, Rahul. "Control of cell behavior by engineering substrata with defined surface topography and chemistry." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/33489.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Fitzpatrick, Daniel Ewert. "Engineering chemistry : integrated control strategies and Internet-enabled tools for chemical synthesis." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267427.

Full text

Abstract:

The use of enabling technologies and continuous methods to enhance chemical synthesis is a vibrant area of research, gaining increasing attention from laboratories in academia and industry. Yet many prominent synthesis procedures have not changed for decades and require significant manual intervention from bench chemists, which may lead to the waste of both human and material resources. The research described herein details how chemistry has been bridged with engineering to address this issue in a world increasingly focussed on sustainability and efficiency. This thesis is divided into four ch

APA, Harvard, Vancouver, ISO, and other styles

3

Salazar, Hernandez Damian A. "Chemistry and Chemical Engineering Process for Making PET from Bio Based Monomers." University of Toledo / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1449862726.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Smith, Gregory K. "Simulations of chemical catalysis." Thesis, The University of New Mexico, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3612623.

Full text

Abstract:

<p> This dissertation contains simulations of chemical catalysis in both biological and heterogeneous contexts. A mixture of classical, quantum, and hybrid techniques are applied to explore the energy profiles and compare possible chemical mechanisms both within the context of human and bacterial enzymes, as well as exploring surface reactions on a metal catalyst. A brief summary of each project follows. </p><p> Project 1 - Bacterial Enzyme SpvC </p><p> The newly discovered SpvC effector protein from <i>Salmonella typhimurium </i> interferes with the host immune response by dephosphory

APA, Harvard, Vancouver, ISO, and other styles

5

Singh, Lakhbinder. "Dynamic simulation of chemical processes." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9731/.

Full text

Abstract:

This thesis describes the design and implementation of an interactive dynamic simulator called DASPRII. The starting point of this research has been an existing dynamic simulation package, DASP. DASPII is written in standard FORTRAN 77 and is implemented on universally available IBM-PC or compatible machines. It provides a means for the analysis and design of chemical processes. Industrial interest in dynamic simulation has increased due to the recent increase in concern over plant operability, resiliency and safety. DASPII is an equation oriented simulation package which allows solution of dy

APA, Harvard, Vancouver, ISO, and other styles

6

Timko, Michael T. 1974. "Acoustic emulsions of liquid, near-critical carbon dioxide and water : application to synthetic chemistry through reaction engineering." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29375.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2004.<br>Includes bibliographical references.<br>Supervised by The need to eliminate hazardous solvents, such as methanol, toluene, and dichloromethane, in specialty and pharmaceutical chemical synthesis applications has motivated the development of alternative approaches. Because of its environmental compatibility, low cost, and favorable physicochemical properties, supercritical carbon dioxide (scCO2) has been actively considered to replace conventional hydrocarbon solvents. Progress towards this objective

APA, Harvard, Vancouver, ISO, and other styles

7

West, Anthony A. "Structural studies in tellurium chemistry." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9705/.

Full text

Abstract:

The primary theme of this research was the characterisation of new and novel organo-tellurium complexes, using the technique of single crystal X-ray analysis to establish more firmly the various coordination modes of tellurium. In each study the unit cell dimensions and intensity data were collected using an Enraf-Nonius CAD-4, four circle diffractometer. The raw data collected in turn was transferred to the Birmingham University Honeywell Multics System and processed using the appropriate computer packages for the determination of crystal structures. The molecular and crystal structures of: b

APA, Harvard, Vancouver, ISO, and other styles

8

Breakwell, I. K. "Chemical modification of smectite clays." Thesis, Aston University, 1992. http://publications.aston.ac.uk/9790/.

Full text

Abstract:

Today, speciality use organoclays are being developed for an increasingly large number of specific applications. Many of these, including use in cosmetics, polishes, greases and paints, require that the material be free from abrasive impurities so that the product retains a smooth `feel'. The traditional `wet' method preparation of organoclays inherently removes abrasives naturally present in the parent mineral clay, but it is time-consuming and expensive. The primary objective of this thesis was to explore the alternative `dry' method (which is both quicker and cheaper but which provides no r

APA, Harvard, Vancouver, ISO, and other styles

9

Kavanagh, Debbie M. "Chemical and physical characterization of clay bodies." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9643/.

Full text

Abstract:

Suitable methods for the assessment of the effect of freeze-thaw action upon ceramic tiles have been determined. The results obtained have been shown to be reproducible with some work in this area still warranted. The analysis of Whichford Potteries clays via a variety of analytical techniques has shown them to be a complex mix of both clay and non-clay minerals. 57Fe Mössbauer spectroscopy has highlighted the presence of both small and large particleα-Fe203, removable via acid washing. 19F MAS NMR has demonstrated that the raw Whichford Pottery clays examined have negligible fluorine content.

APA, Harvard, Vancouver, ISO, and other styles

10

Peng, Xi. "Oxidation and stabilisation chemistry of metallocene-based polyolefins during melt processing." Thesis, Aston University, 2004. http://publications.aston.ac.uk/9657/.

Full text

Abstract:

Metallocene catalyzed linear low density polyethylene (m-LLDPE) is a new generation of olefin copolymer. Based on the more recently developed metallocene-type catalysts, m-LLDPE can be synthesized with exactly controlled short chain branches and stereo-regular microstructure. The unique properties of these polymers have led to their applications in many areas. As a result, it is important to have a good understanding of the oxidation mechanism of m-LLDPE during melt processing in order to develop more effective stabilisation systems and continue to increase the performance of the material. The

APA, Harvard, Vancouver, ISO, and other styles

11

Lütkenhaus, Davidson. "Engineering understanding of cleaning : effect of chemistry and mechanical forces on soil removal." Thesis, University of Birmingham, 2017. http://etheses.bham.ac.uk//id/eprint/7929/.

Full text

Abstract:

The cleaning of food-based soils is highly relevant in domestic and industrial environments due to the costs associated with these operations as well as the significant consumption of time, water, and energy. Understanding the relationship between chemical and mechanical forces required to clean a surface is a critical step towards optimizing these processes. A complex twophase polymerized grease was developed and characterized with respect to its morphology, component distribution, and chemical composition. A thorough evaluation and physicochemical characterization of the cleaning process of

APA, Harvard, Vancouver, ISO, and other styles

12

Artus, Kevin J. "The chemical modification of polymer blends by reactive processing." Thesis, Aston University, 1994. http://publications.aston.ac.uk/9689/.

Full text

Abstract:

The primary objective of this research was to examine the concepts of the chemical modification of polymer blends by reactive processing using interlinking agents (multi-functional, activated vinyl compounds ; trimethylolpropane triacrylates {TRIS} and divinylbenzene {DVD}) to target in-situ interpolymer formation between immiscible polymers in PS/EPDM blends via peroxide-initiated free radical reactions during melt mixing. From a comprehensive survey of previous studies of compatibility enhancement in polystyrene blends, it was recognised that reactive processing offers opportunities for tech

APA, Harvard, Vancouver, ISO, and other styles

13

Illes, Josef L. "Optimization of chemical plant simulation using double collocation." Thesis, Aston University, 1993. http://publications.aston.ac.uk/9757/.

Full text

Abstract:

A method has been constructed for the solution of a wide range of chemical plant simulation models including differential equations and optimization. Double orthogonal collocation on finite elements is applied to convert the model into an NLP problem that is solved either by the VF 13AD package based on successive quadratic programming, or by the GRG2 package, based on the generalized reduced gradient method. This approach is termed simultaneous optimization and solution strategy. The objective functional can contain integral terms. The state and control variables can have time delays. Equalit

APA, Harvard, Vancouver, ISO, and other styles

14

McAvoy, Camille Z. "Palladium-catalyzed C-N cross-coupling reactions toward the synthesis of drug-like molecules." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73388.

Full text

Abstract:

Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Chemistry; and, (S.B.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. ).<br>The development of methodologies for C-N bond formation reactions is an important scientific challenge because of many academic and industrial applications. This work will focus particularly on palladium-catalyzed cross-couplings of amine-containing compounds with aryl halides. The scope of the BrettPhos precatalyst for the cross-coupling of ort

APA, Harvard, Vancouver, ISO, and other styles

15

Trease, Claire Heather. "Design and development of novel absorber coating for solar collector applications." Thesis, Kingston University, 2017. http://eprints.kingston.ac.uk/41036/.

Full text

Abstract:

Global average power consumption is 17 terawatts (10[to the power of]12W) and the rate of solar energy received at the Earth's surface is more than 120 petawatts (10[to the power of]15W). Therefore, the earth receives as much solar energy in one day as is used by the entire world in 20 years. Solar thermal collectors use absorber coatings and layers to convert incident radiation, via photothermal conversion, into useful energy i.e. heat. Re-radiation of this heat is minimised using a solar selective surface. Patterning non-thermal curing epoxy resins, in the micron scale, using electrohydrodyn

APA, Harvard, Vancouver, ISO, and other styles

16

Abdallah, Suaad Audat. "Investigation of Oxidative DNA Damage from Ionizing Radiation." University of Toledo Health Science Campus / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=mco1349377002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Brammer, John G. "Study of biomass gasifier-engine systems with integrated feed drying for power and CHP." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9631/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Bouic, Phillip J. "Ruthenium complexes as potential aqueous romp catalysts." Thesis, Aston University, 1996. http://publications.aston.ac.uk/9676/.

Full text

Abstract:

The research described herein relates to studies into the Aqueous Ring-Opening Metathesis Polymerisation (ROMP) of bicyclic monomers using ruthenium complex catalysts. Two monomers were synthesised for the purpose of these studies, namely exo, exo-7-oxabicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (7-oxanorbornenedicarboxylic acid) and exo, exo-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid (norbornene dicarboxylic acid). A number of ruthenium complexes were synthesised, amongst them a novel complex containing the water soluble phosphine ligand trist(hydroxymethyl)phosphine P(CH2OH)3. Its syn

APA, Harvard, Vancouver, ISO, and other styles

19

Fisal, Zahedi B. "Real-time process plant fault diagnosis." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9703/.

Full text

Abstract:

Operators can become confused while diagnosing faults in process plant while in operation. This may prevent remedial actions being taken before hazardous consequences can occur. The work in this thesis proposes a method to aid plant operators in systematically finding the causes of any fault in the process plant. A computer aided fault diagnosis package has been developed for use on the widely available IBM PC compatible microcomputer. The program displays a coloured diagram of a fault tree on the VDU of the microcomputer, so that the operator can see the link between the fault and its causes.

APA, Harvard, Vancouver, ISO, and other styles

20

Lloyd, Michael C. "Novel materials for membrane separation processes." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9680/.

Full text

Abstract:

The aim of this work was to synthesise a series of hydrophilic derivatives of cis-1,2-dihydroxy-3,5-cyclohexadiene (cis-DHCD) and copolymerise them with 2-hydroxyethyl methacrylate (HEMA), to produce a completely new range of hydrogel materials. It is theorised that hydrogels incorporating such derivatives of cis-DHCD will exhibit good strength and elasticity in addition to good water binding ability. The synthesis of derivatives was attempted by both enzymatic and chemical methods. Enzyme synthesis involved the transesterification of cis-DHCD with a number of trichloro and trifluoroethyl este

APA, Harvard, Vancouver, ISO, and other styles

21

Mjalli, Farouq S. "Mathematical modelling and control of agitated extraction columns." Thesis, Aston University, 2003. http://publications.aston.ac.uk/9652/.

Full text

Abstract:

Liquid-liquid extraction has long been known as a unit operation that plays an important role in industry. This process is well known for its complexity and sensitivity to operation conditions. This thesis presents an attempt to explore the dynamics and control of this process using a systematic approach and state of the art control system design techniques. The process was studied first experimentally under carefully selected. operation conditions, which resembles the ranges employed practically under stable and efficient conditions. Data were collected at steady state conditions using adequa

APA, Harvard, Vancouver, ISO, and other styles

22

Bouchekif, Hassen. "From uncontrolled to control and then 'quasiliving' Cationic ring-opening polymerisation (C.R.O.P.)of oxetane by activation chain-end (A.C.E.) mechanism." Thesis, Aston University, 2002. http://publications.aston.ac.uk/9656/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Nubi, Valerie. "The Synthesis and properties of functionalised polymers." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9683/.

Full text

Abstract:

The aim of this project was to synthesise fluorinated polymers that might act as hot material in a guest-host system for use in non-linear optical applications. These polymers would be expected to have the advantage over materials such as poly(vinylidene fluoride) which is known to be incompatible with many nlo active materials. A series of bicyclic fluorinated monomers was prepared by the reaction of fluorinated dienophiles with cyclopentadiene in a series of Diels-Alder reactions. The monomers were purified and then used in ring opening metathesis polymerisation. The materials were then char

APA, Harvard, Vancouver, ISO, and other styles

24

Mann, Aisling M. "Immunological and biochemical techniques in the analysis of tear proteins." Thesis, Aston University, 1998. http://publications.aston.ac.uk/9598/.

Full text

Abstract:

This study is concerned with the analysis of tear proteins, paying particular attention to the state of the tears (e.g. non-stimulated, reflex, closed), created during sampling, and to assess their interactions with hydrogel contact lenses. The work has involved the use of a variety of biochemical and immunological analytical techniques for the measurement of proteins, (a), in tears, (b), on the contact lens, and (c), in the eluate of extracted lenses. Although a diverse range of tear components may contribute to contact lens spoilation, proteins were of particular interest in this study becau

APA, Harvard, Vancouver, ISO, and other styles

25

Walton, Anthony G. "Computer simulation of liquid flow patterns on distillation trays." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9586/.

Full text

Abstract:

This thesis describes work carried out to improve the fundamental modelling of liquid flows on distillation trays. A mathematical model is presented based on the principles of computerised fluid dynamics. It models the liquid flow in the horizontal directions allowing for the effects of the vapour through the use of an increased liquid turbulence, modelled by an eddy viscosity, and a resistance to liquid flow caused by the vapour being accelerated horizontally by the liquid. The resultant equations are similar to the Navier-Stokes equations with the addition of a resistance term. A mass-transf

APA, Harvard, Vancouver, ISO, and other styles

26

Patel, Sunil U. "Nuclear magnetic resonance spectroscopy and ultrasound." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9708/.

Full text

Abstract:

The work described in this thesis is directed to the examination of the hypothesis that ultrasound may be used to perturb molecular motion in the liquid phase. These changes can then be detected by nuclear magnetic resonance (NMR) in spin-lattice and spin-spin relaxation times. The objective being to develop a method capable of reducing the pulsed NMR acquisition times of slowly relaxing nuclei. The thesis describes the theoretical principles underlying both NMR spectroscopy and ultrasonics with particular attention being paid to factors that impinge on testing the above hypothesis. Apparatus

APA, Harvard, Vancouver, ISO, and other styles

27

Jones, Lyndon William James. "Ocular compatibility of hydrogel contact lenses : deposition and clinical performance." Thesis, Aston University, 1998. http://publications.aston.ac.uk/9635/.

Full text

Abstract:

Currently over 50 million people worldwide wear contact lenses, of which over 75% wear hydrogel lenses. Significant deposition occurs in approximately 80% of hydrogel lenses and many contact lens wearers cease wearing lenses due to problems associated with deposition. The contact lens field is not alone in encountering complications associated with interactions between the body and artificial devices. The widespread use of man-made materials to replace structures in the body has emphasised the importance of studies that examine the interactions between implantation materials and body tissues.

APA, Harvard, Vancouver, ISO, and other styles

28

Zanganas, Panayiotis. "Fermentation methods for dextransucrase production." Thesis, Aston University, 1993. http://publications.aston.ac.uk/9693/.

Full text

Abstract:

Several fermentation methods for the production of the enzyme dextransucrase have been employed. The theoretical aspects of these fermentation techniques have been given in the early chapters of this thesis together with a brief overview of enzyme biotechnology. A literature survey on cell recycle fermentation has been carried out followed by a survey report on dextransucrase production, purification and the reaction mechanism of dextran biosynthesis. The various experimental apparatus as employed in this research are described in detail. In particular, emphasis has been given to the developme

APA, Harvard, Vancouver, ISO, and other styles

29

Whetton, Stephen. "Novel imprinted polymers as artificial enzymes." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9644/.

Full text

Abstract:

Derivatives of L-histidine were investigated as suitable models for the Asp-His couple found in the catalytic triad of serine proteases. A combination of molecular dynamics and IH NMR spectroscopy suggested that the most populous conformations of N-acetyl-L-histidine and the N-acetyl-L-histidine anion were predominated by those in which the carboxylate group was gauche to the imidazole ring overcoming steric and electrostatic repulsion, suggesting there is an interaction between the carboxylate group and the imidazole ring. Kinetic studies, using imidazole, N-acetyl-L-histidine and the N-acety

APA, Harvard, Vancouver, ISO, and other styles

30

Gill, Udkhar S. "A novel plasma etching and emission monitoring system (PEEMS) to assess protein and lipid spoilation for hydrogel contact lenses." Thesis, Aston University, 1997. http://publications.aston.ac.uk/9615/.

Full text

Abstract:

The work presents a new method that combines plasma etching with extrinsic techniques to simultaneously measure matrix and surface protein and lipid deposits. The acronym for this technique is PEEMS - Plasma Etching and Emission Monitoring System. Previous work has identified the presence of proteinaceous and lipoidal deposition on the surface of contact lenses and highlighted the probability that penetration of these spoilants will occur. This technique developed here allows unambiguous identification of the depth of penetration of spoilants to be made for various material types. It is for th

APA, Harvard, Vancouver, ISO, and other styles

31

Buniran, Surani. "Compatibilisation and stabilisation of immiscible polymer blends by reactive processing." Thesis, Aston University, 1993. http://publications.aston.ac.uk/9593/.

Full text

Abstract:

The main objectives of this research were to develop optimised chemical compositions and reactive processing conditions for grafting a functional monomer maleic anhydride (MA) in polypropylene (PP), ethylene propylene diene monomer (EPDM) and mixtures of PP-EPDM, and to optimise synthetic routes for production of PP/EPDM copolymers for the purpose of compatibilisation of PP/EPDM blends. The MA-functionalisation was achieved using an internal mixer in the presence of low concentrations (less than 0.01 molar ratio) of a free radical initiator. Various methods were used to purify MA-functionalise

APA, Harvard, Vancouver, ISO, and other styles

32

Hassan, Haydar M. "Mechanisms of drying of skin forming materials." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9745/.

Full text

Abstract:

The literature relating to evaporation from single droplets of pure liquids, and to the drying of droplets containing solids and of droplet sprays has been reviewed. The heat and mass transfer rates for a single droplet suspended from a nozzle were studied within a 42mm I.D. horizontal wind tunnel designed to supply hot dry air, to simulate conditions encountered in a practical spray dryer. A novel rotating glass nozzle was developed to facilitate direct measurements of droplet weight and core temperature. This design minimised heat conduction through the nozzle. Revised correlations were obta

APA, Harvard, Vancouver, ISO, and other styles

33

Embleton, Jonathan K. "Microencapsulation studies with P(HB-HV) polymers." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9742/.

Full text

Abstract:

Microencapsulation processes, based upon the concept of solvent evaporation, have been employed within these studies to prepare microparticles from poly--hydroxybutyrate homopolymers and copolymers thereof with 3-hydroxyvalerate [P(HB-HV) polymers]. Variations in the preparative technique have facilitated the manufacture of two structurally distinct forms of microparticle. Thus, monolithic microspheres and reservoir-type microcapsules have been respectively fabricated by single and double emulsion-solvent evaporation processes. The objective of the studies reported in chapter three is to asses

APA, Harvard, Vancouver, ISO, and other styles

34

Zain, Husni K. "Phase equilibrium studies at moderate pressures." Thesis, Aston University, 1992. http://publications.aston.ac.uk/9743/.

Full text

Abstract:

The theory of vapour-liquid equilibria is reviewed, as is the present status or prediction methods in this field. After discussion of the experimental methods available, development of a recirculating equilibrium still based on a previously successful design (the modified Raal, Code and Best still of O'Donnell and Jenkins) is described. This novel still is designed to work at pressures upto 35 bar and for the measurement of both isothermal and isobaric vapour-liquid equilibrium data. The equilibrium still was first commissioned by measuring the saturated vapour pressures of pure ethanol and cy

APA, Harvard, Vancouver, ISO, and other styles

35

Boukis, Ioannis P. "Fast pyrolysis of biomass in a circulating fluidised bed reactor." Thesis, Aston University, 1997. http://publications.aston.ac.uk/9596/.

Full text

Abstract:

The objective of this work was to design, construct, test and operate a novel circulating fluid bed fast pyrolysis reactor system for production of liquids from biomass. The novelty lies in incorporating an integral char combustor to provide autothermal operation. A reactor design methodology was devised which correlated input parameters to process variables, namely temperature, heat transfer and gas/vapour residence time, for both the char combustor and biomass pyrolyser. From this methodology a CFB reactor was designed with integral char combustion for 10 kg/h biomass throughput. A full-scal

APA, Harvard, Vancouver, ISO, and other styles

36

Morcom, Andrea R. "PH responsive polymers for controlled release of liposomal contents." Thesis, Aston University, 2004. http://publications.aston.ac.uk/9658/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Franklin, Valerie J. "Lipoidal species in ocular spoilation processes." Thesis, Aston University, 1990. http://publications.aston.ac.uk/9738/.

Full text

Abstract:

Tear component deposition onto contact lenses is termed `spoilation' and occurs due to the interaction of synthetic polymers with their biological fluid environment. Spoilation phenomena alter the physico-chemical properties of hydrophilic contact lenses, diminishing the optical properties of the lens; causing discomfort and complications for the wearer. Eventually these alterations render the lens unwearable. The primary aim of this interdisciplinary study was to develop analytical techniques capable of analysing the minute quantities of biological deposition involved, in particular the lipid

APA, Harvard, Vancouver, ISO, and other styles

38

Sariri-Khayatzadeh, Reyhaneh. "Tear protein interaction with hydrogel contact lenses." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9747/.

Full text

Abstract:

The design and synthesis of biomaterials covers a growing number of biomedical applications. The use of biomaterials in biological environment is associated with a number of problems, the most important of which is biocompatabUity. If the implanted biomaterial is not compatible with the environment, it will be rejected by the biological site. This may be manifested in many ways depending on the environment in which it is used. Adsorption of proteins takes place almost instantaneously when a biomaterial comes into contact with most biological fluids. The eye is a unique body site for the study

APA, Harvard, Vancouver, ISO, and other styles

39

Weekes, Anna L. "Design and construction of an ultrasonic probe for use in a Cryo-Magnet NMR Spectrometer." Thesis, Aston University, 1998. http://publications.aston.ac.uk/9612/.

Full text

Abstract:

SINNMR (Sonically Induced Narrowing of the Nuclear Magnetic Resonance spectra of solids), is a novel technique that is being developed to enable the routine study of solids by nuclear magnetic resonance spectroscopy. SINNMR aims to narrow the broad resonances that are characteristic of solid state NMR by inducing rapid incoherent motion of solid particles suspended in a support medium, using high frequency ultrasound in the range 2-10 MHz. The width of the normal broad resonances from solids are due to incomplete averaging of several components of the total spin Hamiltonian caused by restricti

APA, Harvard, Vancouver, ISO, and other styles

40

Yahya, Ishak B. "Compatibilisation of heterogeneous polymer blends by reactive processing." Thesis, Aston University, 1994. http://publications.aston.ac.uk/9684/.

Full text

Abstract:

Functionalisation of polystyrene, PS, and ethylene-co-propylene-co-cyclopentadiene terpolymer, EPDM, with acrylic acid, AA, in a melt reactive processing procedure, in the presence of peroxide, trigonox 101, and coagents, Divinyl benzene, DVB (for PS), and trimethylolpropane triacrylate, TRIS (for EPDM), were successfully carried out. The level of grafting of the AA, as determined by infrared analysis, was significantly enhanced by the coagents. The grafting reaction of AA takes place simultaneously with homopolymerisation of the monomers, melt degradation and crosslinking reactions of the pol

APA, Harvard, Vancouver, ISO, and other styles

41

Bodman, Steven D. "Novel catalytic methods for the upgrading of coal liquids." Thesis, Aston University, 1999. http://publications.aston.ac.uk/9618/.

Full text

Abstract:

Reproducible preparation of a number of modified clay and clay-like materials by both conventional and microwave-assisted chemistry, and their subsequent characterisation, has been achieved, These materials are designed as hydrocracking catalysts for the upgrading of liquids obtained by the processing of coal. Contact with both coal derived liquids and heavy petroleum resids has demonstrated that these catalysts are superior to established proprietary catalysts in terms of both initial activity and deactivation resistance, Of particular activity were a chromium-pillared montmorillonite and a t

APA, Harvard, Vancouver, ISO, and other styles

42

Sudlow, Colin A. "The atomisation of detergent slurries." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9732/.

Full text

Abstract:

A study was made to determine the conditions under which the optimum droplet size distribution (ie., narrowest size range with a minimum of fines and over-sized agglomerates), is generated in sprays from centrifugal pressure nozzles. A range of non-Newtonian detergent slurries were tested but the results are of wider application and parallel work was undertaken with water, ionic solutions and chalk slurries. Six centrifugal pressure nozzles were used and the drop-size distributions correlated as a function of fluid properties, pressure, fiowrate, feed temperature, and nozzle characteristics. M

APA, Harvard, Vancouver, ISO, and other styles

43

Brough, Peter E. "The synthesis of a ferromagnetic polymer." Thesis, Aston University, 1999. http://publications.aston.ac.uk/9624/.

Full text

Abstract:

The aim of this study was to prepare a ferromagnetic polymer using the design elements of molecular magnets. This involved the preparation of co-polyradicals of phenylacetylenes bearing nitronyl nitroxides and nitro/cyano groups. The magnetic properties of the materials were determined using a SQUID magnetometer. A novel rhodium catalyst, Rh(NBD)(NH3)Cl, was prepared in order to obtain good yields of polymerisation. A wide range of substituted phenylacetylenes were first homopolymerised in order to assess the efficiency of the catalyst. Yields were generally high, between 75% and 98%, and the

APA, Harvard, Vancouver, ISO, and other styles

44

Solantausta, Yrjo O. "Cost and performance analysis of new wood-fuelled power plant concepts." Thesis, Aston University, 2000. http://publications.aston.ac.uk/9628/.

Full text

Abstract:

The objective of the thesis was to analyse several process configurations for the production of electricity from biomass. Process simulation models using AspenPlus aimed at calculating the industrial performance of power plant concepts were built, tested, and used for analysis. The criteria used in analysis were performance and cost. All of the advanced systems appear to have higher efficiencies than the commercial reference, the Rankine cycle. However, advanced systems typically have a higher cost of electricity (COE) than the Rankine power plant. High efficiencies do not reduce fuel costs en

APA, Harvard, Vancouver, ISO, and other styles

45

Evans, Kathryn R. "Ocular biomaterials and the anterior eye." Thesis, Aston University, 1997. http://publications.aston.ac.uk/9638/.

Full text

Abstract:

Hydrogels, water swollen polymer matrices, have been utilised in many biomedical applications, as there is the potential to manipulate the properties for a given application by changing the chemical structure of the constituent monomers The eye provides an excellent site to examne the interaction between a synthetic material and a complex biological fluid without invasive surgery. There is a need for the development of new synthetic hydrogels for use in the anterior eye, Three applications of hydrogels in the eye were considered in this thesis. For some patients, the only hope of any visual im

APA, Harvard, Vancouver, ISO, and other styles

46

Kong, Wei. "Reactive processing methods for functionalisation of polymers and in-situ compatibilisation of poly(ethylene terephthalate)-based blends." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9629/.

Full text

Abstract:

One of the main objectives of this study was to functionalise various rubbers (i.e. ethylene propylene copolymer (EP), ethylene propylene diene terpolymer (EPDM), and natural rubber (NR)) using functional monomers, maleic anhydride (MA) and glycidyl methacrylate (GMA), via reactive processing routes. The functionalisation of the rubber was carried out via different reactive processing methods in an internal mixer. GMA was free-radically grafted onto EP and EPDM in the melt state in the absence and presence of a comonomer, trimethylolpropane triacrylate (TRlS). To optinuse the grafting conditio

APA, Harvard, Vancouver, ISO, and other styles

47

Kumpalume, Peter. "Optimisation and applications of expanded bed adsorption chromatography." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9640/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Eccleston, Mark Edward. "Functional polymers for biomedical application : synthesis and applications." Thesis, Aston University, 1995. http://publications.aston.ac.uk/9591/.

Full text

Abstract:

Aromatic and aliphatic diacid chlorides were used to condense naturally occurring diamino acids and their esterified derivatives. It was anticipated the resulting functional polyamides would biodegrade to physiologically acceptable compounds and show pH dependant solubility could be used for biomedical applications ranging from enteric coatings to hydrosoluble drug delivery vehicles capable of targeting areas of low physiological pH. With these applications in mind the polymers were characterised by infra red spectroscopy, gel permeation chromatography and in the case of aqueous soluble polyme

APA, Harvard, Vancouver, ISO, and other styles

49

Akintoye, Ayodele. "Continuous chromatographic biochemical reaction-separation." Thesis, Aston University, 1989. http://publications.aston.ac.uk/9739/.

Full text

Abstract:

Combined bioreaction separation studies have been carried out for the first time on a moving port semi-continuous counter-current chromatographic reactor-separator (SCCR-S1) consisting of twelve 5.4cm id x 75cm long columns packed with calcium charged cross-linked polystyrene resin (KORELA V07C). The inversion of sucrose to glucose and fructose in the presence of the enzyme invertase and the biochemIcal synthesis of dextran and fructose from sucrose in the presence of the enzyme dextransucrase were investigated. A dilute stream of the appropriate enzyme in deionised water was used as the eluen

APA, Harvard, Vancouver, ISO, and other styles

50

Woodgate, John M. "Purification of plasmid DNA for use in human gene therapy." Thesis, Aston University, 2001. http://publications.aston.ac.uk/9632/.

Full text

Abstract:

Two key issues defined the focus of this research in manufacturing plasmid DNA for use In human gene therapy. First, the processing of E.coli bacterial cells to effect the separation of therapeutic plasmid DNA from cellular debris and adventitious material. Second, the affinity purification of the plasmid DNA in a Simple one-stage process. The need arises when considering the concerns that have been recently voiced by the FDA concerning the scalability and reproducibility of the current manufacturing processes in meeting the quality criteria of purity, potency, efficacy, and safety for a recom

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!