Browsing Chemical Sciences by Title

Now showing items 127-146 of 313

Identification of difficult topics in the teaching and learning of Chemistry in Irish schools and the development of an intervention programme to target some of these difficulties

Childs, Peter; Sheehan, Maria (University of Limerick, Department of Chemical & Environmental Science, 2010)

The purpose of this investigation was to identify the topics in Chemistry that the majority of Irish pupils find difficult from Junior Certificate level right through to Third Level. It was then hoped to determine the ...
Identification of the difficulties in teaching and learning of introductory organic chemistry in Ireland and the development of a second-level intervention programme to address these

O'Dwyer, Anne (University of Limerick, 2012)

This project involved the effective implementation of Chemistry Education Research (CER) into classroom practice. The project was carried out in two cycles. Cycle One of the project involved two investigations: one at ...
Immobilisation of catalysts for applications in organic reactions

Abdallah, Noreldeen Hassan. (University of Limerick, 2016)

The use of catalysts generally requires the immobilisation of the catalyst at specific locations, a requirement that can pose a significant challenge. The use of mesoporous silicate materials as supports offers some valuable ...
Immobilisation of enzymes on mesoporous silicate materials

Magner, Edmond (Royal Society of Chemistry, 2013)

Mesoporous silicates (MPS) are attractive materials for the immobilisation of enzymes. They possess ordered pore structures, narrow pore size distributions, large surface areas, high stability and can be chemically ...
Improving estimates of the crystallization driving force: investigation into the dependence on temperature and composition of activity coefficients in solution

Svärd, Michael; Valavi, Masood; Rasmuson, Åke C. (American Chemical Society, 2016)

In this work the influence of temperature and composition on the activity coefficient in solution has been investigated, based on isothermal and isobaric vapor-liquid equilibrium data for 30 binary systems classified into ...
Influence of agitation and fluid shear on nucleation of m-hydroxybenzoic acid polymorphs

Liu, Jin; Svärd, Michael; Rasmuson, Åke C. (American Chemical Society, 2014)

The influence of agitation and fluid shear on nucleation of m-hydroxybenzoic acid polymorphs from 1-propanol solution has been investigated through 1160 cooling crystallization experiments. The induction time has been ...
Influence of agitation on primary nucleation in stirred tank crystallizers

Liu, Jin; Svärd, Michael; Rasmuson, Åke C. (American Chemical Society, 2015)

The influence of agitation on nucleation of butyl paraben and m-hydroxybenzoic acid polymorphs has been investigated through 330 cooling crystallization experiments. The induction time has been measured at different ...
Influence of fast pyrolysis conditions on yield and structural transformation of biomass chars

Trubetskaya, Anna; Jensen, Peter Arendt; Jensen, Anker Degn; Steibel, Markus; Spliethoff, Hartmut; Glarborg, Peter (Elsevier, 2015)

Fast pyrolysis of biomass (wood, straw, rice husk) and its major components (cellulose, hemicellulose, lignin) was conducted in a wire mesh reactor. The aim of this study was to understand the influence of temperature ...
Influence of history of solution in crystal nucleation of fenoxycarb: kinetics and mechanisms

Kuhs, Manuel; Zeglinski, Jacek; Rasmuson, Åke C. (American Chemical Society, 2014)

Nearly 1800 induction time experiments have been performed on crystal nucleation of fenoxycarb in isopropanol to investigate the influence of solution pretreatment. For each preheating temperature and preheating time, ...
Influence of solution thermal and structural history on the nucleation of m-hydroxybenzoic acid polymorphs

Nordström, Fredrik; Svärd, Michael; Malmberg, Baldur; Rasmuson, Åke C. (American Chemical Society, 2012)

The influence of solution pretreatment on primary nucleation of m-hydroxybenzoic acid has been investigated through 550 cooling crystallization experiments. The metastable zone width has been determined at constant cooling ...
The influence of solvent on the nucleation of mediums-sized flexible organic molecules from solution

Kuhs, Manuel (University of Limerick, 2015)

In this thesis the influence of solvents on crystal nucleation is probed to progress understanding of crystal nucleation from solution. Induction times of two solutes in different solvents and at different thermodynamic driving ...
Influence of structurally related impurities on the crystal nucleation of curcumin

Heffernan, Claire; Ukrainczyk, Marko; Zeglinski, Jacek; Hodnett, Benjamin K.; Rasmuson, Åke C. (American Chemical Society, 2018)

In this work, the influence of the structurally related impurities, Demethoxycurcumin (DMC) and Bisdemethoxycurcumin (BDMC) on the primary nucleation of Curcumin (CUR) has been investigated in propan-2-ol. The induction ...
Injectable in situ cross-linking hydrogels for local antifungal therapy

Hudson, Sarah P.; Langer, Robert; Fink, Gerald R.; Kohane, Daniel S. (Elsevier, 2010)

Invasive fungal infections can be devastating, particularly in immunocompromised patients, and difficult to treat with systemic drugs. Furthermore, systemic administration of those medications can have severe side effects. ...
Innovation in energy analysis: development of GALGEM - general approach to low grade energy management

Greene Mooney, Emma Elizabeth (University of Limerick, 2014)

Reducing industrial low-grade heat generation and waste can lead to improved energy efficiency, decreased environmental emissions, and reduced fuel costs. However, it is an area that is recognised as being underexploited. Many ...
An insight into the role of additives in controlling polymorphic outcome: a CO2-antisolvent crystallization process of carbamazepine

Padrela, Luis; Zeglinski, Jacek; Ryan, Kevin M. (American Chemical Society, 2017)

Controlling pharmaceutical polymorphism in crystallization processes represents a major challenge in pharmaceutical science and engineering. For instance, CO2-antisolvent crystallization typically favors the formation ...
Insights into the composition of recalcitrant organic matter from estuarine sediments using NMR spectroscopy

Mylotte, Rosaleen; Sutrisno, A.; Farooq, H.; Masoom, H.; Soong, Michael H.B.; Simpson, A.J. (Elsevier, 2016)

Sediment cores (ca. 6 m) from an estuarine environment gave insights into the composition and preservation of recalcitrant organic carbon (OC) in the environment. The coring locations provided organic matter (OM) of ...
Insights into the mode of action of a putative zinc transporter CzrB in thermus thermophilus

Cherezov, Vadim; Höfer, Nicole; Szebenyi, Doletha M.E.; Kolaj-Robin, Olga; Wall, J.G.; Gillian, Richard; Srinivasan, Vasundara; Jaroniec, Christopher P.; Caffrey, Martin (Elsevier, 2008)

The crystal structures of the cytoplasmic domain of the putative zinc transporter CzrB in the apoand zinc-bound forms reported herein are consistent with the protein functioning in vivo as a homodimer. NMR, X-ray scattering ...
Integral voltage-gated sodium channels: production, characterisation and investigation into oligomeric state detergent dependence

McCarthy, Marguerita (University of Limerick, 2015)

Voltage-gated sodium channels underlie membrane potentials and electrical excitability in eukaryotes. Malfunctioning sodium channels give rise to conditions such as epilepsy, sensitivity to pain and cardiac arrhythmia. ...
Introducing extra bicarbonate transporters bicA and sbtA in the cyanobacterium synechocystis sp. PCC 6803 for enhanced ethanol production

O'Riordan, Helen (University of Limerick, 2018)

The cyanobacterium Synechocystis sp. PCC 6803 is a model organism for genetic manipulation. Utilising genetically engineered cyanobacteria to produce ethanol offers significant potential as a renewable and sustainable ...
Investigating how design concepts evolve in engineering students.

Dawidow, John Mark; Huff, James L; Leahy, Keelin (American Society for Engineering Education, 2016)

A critical aspect to engineering in the workplace is the ability to design solutions to ill-structured problems. Prior research has shown that such solutions are highly effective when they are evaluated in relation to ...

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