Browsing Chemical Sciences by Title

Now showing items 119-138 of 314

Genotypic and phenotypic analysis of Ralstonia pickettii high purity water isolates

Ryan, Michael P. (University of Limerick, 2009)

Ralstonia is a newly characterised genus that includes former members of the Burkholderia species (Ralstonia pickettii and Ralstonia solanacearum). The type species of the genus-Ralstonia pickettii (type strain, ATCC27511) ...
Genotypic and phenotypic diversity of Ralstonia pickettii and Ralstonia insidiosa isolates from clinical and environmental sources including high-purity water. Diversity in Ralstonia pickettii

Ryan, Michael P.; Pembroke, Tony J.; Adley, Catherine C. (BioMed Central, 2011)

Background: Ralstonia pickettii is a nosocomial infectious agent and a significant industrial contaminant. It has been found in many different environments including clinical situations, soil and industrial high purity ...
Greening healthcare: systematic implementation of environmental programmes in a university teaching hospital

Ryan-Fogarty, Yvonne; O'Regan, Bernadette; Moles, Richard (Elsevier, 2016)

The provision of healthcare creates significant environmental impacts, and their mitigation is being attempted in a variety of ways which vary from nation to nation in line with differing policy priorities and resource ...
Growth of silicon and germanium nanowires in the vapour phase of high boiling point organic solvents

Geaney, Hugh (University of Limerick, 2012)

Herein is presented the development of a versatile glassware based method for the growth of silicon and germanium nanowires. The vapour phase of a high boiling point solvent medium heated to reflux is used as a means of ...
Heterologous production and characterisation of cation diffusion facilitator proteins from the marine bacterium Maricaulis maris MCS10

Russell, David (University of Limerick, 2012)

Cation diffusion facilitators are a diverse family of transporters responsible for the efflux of zinc and other divalent metals from cells. Several putative members of this family were selected as potential targets for ...
High density germanium nanowire growth directly from copper foil by self induced solid seeding

Geaney, Hugh; Dickinson, Calum; Barrett, Christopher A.; Ryan, Kevin M. (American Chemical Society, 2011)

Herein, we describe the growth of highly dense germanium nanowire mats directly on copper foil by a self induced, solid seeded protocol. The existence of Cu3Ge tips on each of the nanowires indicates that growth proceeds ...
Hydrogen production from formic acid vapour over a Pd/C catalyst promoted by potassium salts: evidence for participation of buffer-like solution in the pores of the catalyst

Jia, Lijun; Bulushev, Dmitri A.; Beloshapkin, Sergey; Ross, Julian R.H. (Elsevier, 2014)

Doping a 1 wt.% Pd/C catalyst with alkali metal carbonates has a very significant promotional effect on its activity in hydrogen production from the decomposition of formic acid vapour (2 vol.%, 1 bar), potassium and caesium ...
Hydrogenation of sunflower oil over Pt-Ni bimetallic supported catalysts: preparation, characterisation and catalytic activity

McArdle, Shane; Leahy, James J.; Curtin, Teresa; Tanner, David A. (Elsevier, 2014)

It had been reported that in order to improve oil hydrogenation catalysts the geometric or electronic effects of the catalysts must be manipulated in order to achieve the desired activity or selectivity. To achieve this, ...
Hyphenated analytical techniques for materials characterisation

Armstrong, Gordon; Kailas, Lekshmi (European Physical Society: IOP Publishing, 2017)

This topical review will provide a survey of the current state of the art in 'hyphenated' techniques for characterisation of bulk materials, surface, and interfaces, whereby two or more analytical methods investigating ...
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 ...

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