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Displaying Results 1 - 25 of 833 on page 1 of 34
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Open data, open source and open standards in chemistry: The Blue Obelisk five years on
(2011)
O'Boyle, Noel M.; Guha, Rajarshi; Willighagen, Egon L.; Adams, Samuel E.; Alvarsso...
Open data, open source and open standards in chemistry: The Blue Obelisk five years on
(2011)
O'Boyle, Noel M.; Guha, Rajarshi; Willighagen, Egon L.; Adams, Samuel E.; Alvarsson, Jonathan; Bradley, Jean-Claude; Filippov, Igor V.; Hanson, Robert M.; Hanwell, Marcus D.; Hutchison, Geoffrey R.; James, Craig A James; Jeliazkova, Nina; Lang, Andrew SID; Langner, Karol M.; Lonie, David C.; Lowe, Daniel M.; Pansanel, Jérôme; Pavlov, Dmitry; Spjuth, Ola; Steinbeck, Christoph
Abstract:
Health Research Board (PD/2009/13); National Cancer Institute (HHSN261200800001E); National Institutes of Health, (HHSN261200800001E)
Published Version
Background The Blue Obelisk movement was established in 2005 as a response to the lack of Open Data, Open Standards and Open Source (ODOSOS) in chemistry. It aims to make it easier to carry out chemistry research by promoting interoperability between chemistry software, encouraging cooperation between Open Source developers, and developing community resources and Open Standards. Results This contribution looks back on the work carried out by the Blue Obelisk in the past 5 years and surveys progress and remaining challenges in the areas of Open Data, Open Standards, and Open Source in chemistry. Conclusions We show that the Blue Obelisk has been very successful in bringing together researchers and developers with common interests in ODOSOS, leading to development of many useful resources freely available to the chemistry commu...
http://hdl.handle.net/10468/467
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Online Support and Online Assessment for Teaching and Learning Chemistry
(2009)
McDonnell, Claire; Brouwer, Natasa
Online Support and Online Assessment for Teaching and Learning Chemistry
(2009)
McDonnell, Claire; Brouwer, Natasa
Abstract:
Book title: Innovative Methods of Teaching and Learning Chemistry in Higher Education
In this chapter, examples of innovative approaches that use educational technology to support active learning in chemistry lectures, tutorials and laboratory sessions are considered. The scope of the chapter is limited to blended learning. The strengths and weaknesses of e-learning are examined and the options available for online assessment using electronic tests and e-portfolios are discussed. In addition to the literature references provided in the chapter, several examples of good practice involving the implementation of information and communication technology for chemistry teaching in higher education are incorporated. A list of online resources for lecturers is also included.
http://arrow.dit.ie/scschcpsbk/2
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Syntheses, Structure, Properties, and Chemistry of 1,1-Di(pyrrolyl)ethenes
(1994)
SENGE, MATHIAS
Syntheses, Structure, Properties, and Chemistry of 1,1-Di(pyrrolyl)ethenes
(1994)
SENGE, MATHIAS
Abstract:
Reaction of a 2-unsubstituted pyrrole with acetic anhydride and stannic chloride unexpectedly promotes self-condensation to give symmetrical di( pyrroly1)ethene as a side-product in &lo% yield, but overall yields of these 1,l-di(pyrro1yl)ethenes can be improved to 66% using a rational alternate route; structure and chemistry of 1 ,I-di(pyrroly1)ethenes 2 are discussed
http://hdl.handle.net/2262/40141
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Continuous Improvement in e-Learning: Investigating the Effect and Impact of Our WebCT Chemistry Support Initiative (CSI) and Implications for Further Enhancement of the Virtual Learning Environments (VLEs) Developed
(2007)
O'Connor, Christine; McDonnell, Claire; Seery, Michael
Continuous Improvement in e-Learning: Investigating the Effect and Impact of Our WebCT Chemistry Support Initiative (CSI) and Implications for Further Enhancement of the Virtual Learning Environments (VLEs) Developed
(2007)
O'Connor, Christine; McDonnell, Claire; Seery, Michael
Abstract:
<p>A Virtual Learning Environment (VLE) was developed using WebCT software and was piloted in 2004 in the School of Chemical and Pharmaceutical Sciences in DIT by the authors. This was one of a number of measures introduced with the aim of supporting and retaining first year undergraduates on the Science ordinary degree programme and was designed as a Chemistry Support Initiative (CSI) for first year Chemistry learning and teaching (O’Connor, 2005). This work was supported through funding from the DIT Learning and Teaching Centre which allowed a summer research assistant to be taken on. Since the launch of the first WebCT VLE in our School in September 2004, a VLE has been created for each year of each programme we deliver. This was facilitated by the fact that the first WebCT template design could be adapted quite easily and that first year students expected to continue to have a VLE available as they progressed. Currently, VLEs are used to support undergraduate Chemistry s...
http://arrow.dit.ie/scschcpscon/4
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Chemistry Crosswords: Learning Activities to Support Non-Taditional Students in Third Level Education.
(2010)
O'Connor, Christine; Mc Donnell, Claire; Seery, Michael
Chemistry Crosswords: Learning Activities to Support Non-Taditional Students in Third Level Education.
(2010)
O'Connor, Christine; Mc Donnell, Claire; Seery, Michael
Abstract:
<p>Diversity of students entering third level science education has been widely discussed and attributed to the government policy on widening of participation in education. This has led to an enhanced number of “non traditional” students entering third level courses in Ireland. The diversity of the current third level student body may be attributed to the raised awareness of students with learning difficulties and also to the increase in multi cultural students in Irish third level colleges. One learning strategy that has been introduced into the teaching practice of first year chemistry courses in the Dublin Institute of Technology has been the use of Chemistry Crosswords. There are many advantages of the Crosswords as a support tool as they; engage students in a “fun” learning activity are designed to revise course work helps students with learning difficulties and students in which English is not their first language to spell chemistry terms correctly in the assigned boxe...
http://arrow.dit.ie/scschcpsart/24
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Mathematical transfer by chemistry undergraduate students
(2011)
Hoban, Richard
Mathematical transfer by chemistry undergraduate students
(2011)
Hoban, Richard
Abstract:
This thesis reports on a study of the transfer of mathematical knowledge by undergraduate chemistry students. Transfer in this research refers to the students’ ability to use mathematical concepts, previously experienced within a mathematics course, within chemistry contexts. A pilot study was undertaken with a sample of second-year undergraduate chemistry students in order to determine their ability to transfer mathematical knowledge from a mathematics context to a chemistry context. The results showed that, while certain students could transfer (i.e., answer mathematical items correctly in a mathematics context and then in a chemistry context), many students were unable to transfer due to insufficient mathematical knowledge. These results motivated the main study, in which students’ ability to transfer mathematical concepts was investigated and analysed in two respects. These were the degree to which transfer was present, and the degree to which a particular characteristic, n...
http://doras.dcu.ie/16648/
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Contextualising Nanotechnology in Chemistry Education
(2008)
O'Connor, Christine; Hayden, Hugh
Contextualising Nanotechnology in Chemistry Education
(2008)
O'Connor, Christine; Hayden, Hugh
Abstract:
<p>This paper will give an example of a pedagogical approach taken in integrating nanotechnology into a chemistry degree course. In recent years nanotechnology has widely become part of the course content for undergraduate chemistry and physics degree curriculum. How contextualised the delivery of the subject matter may vary. The role of contextualisation of nanotechnology in the delivery of the content is the main focus of this paper, as to date in Ireland and many other countries nanotechnology has not been integrated into many chemistry degree courses but is slowly becoming the case. An evaluative methodology of the pedagogical approach for two introductory nanotechnology courses has been chosen for this study. Pre and post-course testing at a 4th year level and 2nd year level have been carried out and the feedback summarised. The role of visualisation and contextualisation (linking research and industrial applications to the area) will be discussed in relation to learning...
http://arrow.dit.ie/scschcpsart/23
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Implications of Mass Education on Chemistry Higher Education
(2006)
O'Connor, Christine
Implications of Mass Education on Chemistry Higher Education
(2006)
O'Connor, Christine
Abstract:
<p>The following paper discusses the implications of government policy on widening of participation at third level institutes. The increase in ‘non-traditional’ students has been widely recognised on an international scale; however some inequality issues still exist. The ‘struggles’ associated with widening of participation and creating a ‘new’ student type is discussed in particular reference to chemistry education. A change in mindset of staff on their pedagogical approach to cater for a diverse student body with a broad range of learner types is required. This must be supported from a departmental and institutional level. A look at the literature to investigate what best practice may be in supporting the ‘new’ third level student is reviewed. In conclusion a view at what the future may hold for third level institutes catering for the ‘new’ student type is summarised.</p>
http://arrow.dit.ie/scschcpscon/3
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Ethyl 2-{[2-(3-nitrophenyl)-5-phenyl-1H-imidazol-4-yl]sulfanyl}acetate: synthesis via a microwave-mediated combinatorial chemistry approach
(2002)
Gallagher, John F.; Coleman, Claire M.; O'Shea, Donal F.
Ethyl 2-{[2-(3-nitrophenyl)-5-phenyl-1H-imidazol-4-yl]sulfanyl}acetate: synthesis via a microwave-mediated combinatorial chemistry approach
(2002)
Gallagher, John F.; Coleman, Claire M.; O'Shea, Donal F.
Abstract:
The orange title compound, C₁₉H₁₇N₃O₄S, can be synthesized either via microwave-mediated combinatorial chemistry strategies or conventional synthetic procedures. The phenyl and meta-nitrophenyl C₆ rings are essentially coplanar with the central imidazolyl ring, with interplanar angles of 0.87 (5) and 0.97 (4)°, respectively, resulting in optimum conjugation (SCH₂ moiety included); [lambda]max = 281 nm in CH₃CN. The principal intermolecular interactions are Nimid-H...Onitro and Nimid-H...O=C [N...O = 3.058 (2) and 3.432 (3) Å, and N-H...O = 128 and 153°, respectively]. The closest H...S distance is an intramolecular C-H...S contact, with H...S = 2.54 Å and C-H...S = 136°.
http://doras.dcu.ie/155/
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Non-trivial solution chemistry between amido-pyridylcalix[4]arenes and some metal salts
(2010)
Colleran, John; Creaven, Bernadette; Donlon, Denise; McGinley, John
Non-trivial solution chemistry between amido-pyridylcalix[4]arenes and some metal salts
(2010)
Colleran, John; Creaven, Bernadette; Donlon, Denise; McGinley, John
Abstract:
Mercury ion complexation reactions were carried out between 3 and various mercury(II) salts. 1H NMR studies showed that the role of solvent, the anion chosen and the initial reaction conditions were critical and that the formation of a “simple” mercury(II) complex was non-trivial. The mercury(II) ion can cause either (i) the formation of an ion-pair system, which have a characteristic doubling of all signals in the 1H NMR spectrum, (ii) a cleavage reaction to occur resulting in the reformation of the calix[4]arene diester compound 2, but only when the reaction is heated and (iii) “simple” mercury binding to the pyridine rings when the binding studies are carried out using NMR titration techniques. The electrochemistry results, on the same systems, show that the initial reaction involves the removal of the phenoxide protons followed by the resulting catalysis of the mercury species. This proton removal is not observed in the NMR spectra of any of the mercury reactions. It was also fo...
http://eprints.nuim.ie/2547/
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Fast, copper-free click chemistry: a convenient solid-phase approach to oligonucleotide conjugation
(2009)
Singh, Ishwar; Vyle, Joseph S.; Heaney, Frances
Fast, copper-free click chemistry: a convenient solid-phase approach to oligonucleotide conjugation
(2009)
Singh, Ishwar; Vyle, Joseph S.; Heaney, Frances
Abstract:
Solid-phase oligonucleotide conjugation by nitrile oxide–alkyne click cycloaddition chemistry has been successfully demonstrated; the reaction, compatible with all nucleobases, requires no metal catalyst and proceeds under physiological conditions.
http://eprints.nuim.ie/2706/
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Supporting Information: Fast, Copper-Free Click Chemistry, A Convenient Solid-Phase Approach to Oligonucleotide Conjugation
(2009)
Singh, Ishwar ; Vyle, Joseph S.; Heaney, Frances
Supporting Information: Fast, Copper-Free Click Chemistry, A Convenient Solid-Phase Approach to Oligonucleotide Conjugation
(2009)
Singh, Ishwar ; Vyle, Joseph S.; Heaney, Frances
Abstract:
General experimental Analytical TLC was performed on precoated (250 μm) silica gel 60 F-254 plates from Merck. All plates were visualized by UV irradiation, and/or staining with 5% H2SO4 in ethanol followed by heating. Flash chromatography grade silica gel 60 (230-400 mesh) was obtained from Merck. Mass analysis was performed on an Ettan MALDI-TOF Pro from Amersham Biosciences or LASER-TOF LT3 from Scientific Analytical Instruments with 3- hydroxypicolinic acid or 2,’ 4’, 6’-trihydroxyacetophenone as matrix. The NMR spectra were obtained at 1H (300 MHz), 13C (75 MHz) and 31P (121 MHz) on a Bruker instrument at 25 ºC. Chemical shifts are reported in ppm downfield from TMS as standard. HPLC was carried out using a Gilson instrument equipped with a UV detector and a Nucleosil C18 column (4.0 × 250 mm) or Phenomenex Clarity. Fluorescence spectra were recorded on a Varian Cary Eclipse instrument. All other chemical agents were purchased from Aldrich Chemical Company unless otherwise noted.
http://eprints.nuim.ie/2707/
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The complex synthesis and solid state chemistry of ceria-lanthana solid solutions prepared via a hexamethylenetetramine precipitation.
(2011)
HOLMES, JUSTIN DEREK
The complex synthesis and solid state chemistry of ceria-lanthana solid solutions prepared via a hexamethylenetetramine precipitation.
(2011)
HOLMES, JUSTIN DEREK
Abstract:
Mixed oxide solid solutions are becoming ever more commercially important across a range of applications. However, their synthesis can be problematical. Here, we show that ceria-lanthana solid solutions can be readily prepared via simple precipitation using hexamethylenetetramine. However, the solution chemistry can be complex which results in the precipitated particles having a complex structure and morphology. Great care must be taken in both the synthesis and characterisation to quantify the complexity of the product. Even very high heat treatments were not able to produce highly homogeneous materials and x-ray diffractions reveals the non-equilibrium form of particles prepared in this way. Unexpected crystal structures are revealed including a new metastable cubic La2O3 phase.
http://hdl.handle.net/2262/59852
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Integrating Formative Feedback into Individual and Group Assessments in a First Year Organic Chemistry Module
(2011)
Ryan, Barry; Dunne, Julie
Integrating Formative Feedback into Individual and Group Assessments in a First Year Organic Chemistry Module
(2011)
Ryan, Barry; Dunne, Julie
Abstract:
<p>It is common for science undergraduates, particularly first year students, to remark that they do not receive appropriate support in their transition from second level to third level education; particularly in effective scientific laboratory report writing, new subject area preparedness and technical ‘know-how’ [1]. This is compounded by the insufficient, or inappropriate, feedback offered to students in these problem areas. The pedagogical emphasis often focuses on quantity rather than quality; both in report writing and content delivered. This publication describes an assessment methodology redesign to, firstly, incorporate on-line formative feedback and; secondly, to introduce one-to-one and one-to-group lab report feedback in a first year organic chemistry module to specifically target the problem areas aforementioned.</p>
http://arrow.dit.ie/schfsehcon/5
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Now for the Science Bit: Implementing Community-based Learning in Chemistry
(2011)
Mc Donnell, Claire; Ennis, Patricia; Shoemaker, Leslie
Now for the Science Bit: Implementing Community-based Learning in Chemistry
(2011)
Mc Donnell, Claire; Ennis, Patricia; Shoemaker, Leslie
Abstract:
<p><strong><em>Purpose</em></strong> – The purpose of this paper is to contribute to the understanding of student learning from community engagement by critically assessing the implementation of this pedagogical approach in the context of teaching and learning chemistry and also evaluating the role of personal development in student-community engagement.</p> <p><strong><em>Design/methodology/approach</em></strong> – A case study on the implementation since 2007 of community-based learning (also called service-learning) projects in an academic department in Ireland is presented. Analysis of assessment grades, student reflective accounts and evaluation questionnaires informs this work as does a recently completed self-assessment of our activities using Shumer’s Self-Assessment for Service Learning.</p> <p><strong><em>Findings</em></strong> – A marked improvement in student engagement ...
http://arrow.dit.ie/scschcpsart/28
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Implications of mass education on chemistry higher education
(2006)
O'Connor, Christine
Implications of mass education on chemistry higher education
(2006)
O'Connor, Christine
Abstract:
The following paper discusses the implications of government policy for widening access and participation in third level institutes. The increase in ‘non-traditional’ students has been widely recognised on an international scale; however, some issues of inequality still exist. The ‘struggles’ associated with widening participation and the creation of a ‘new’ student type are discussed, with particular reference to chemistry education. A change is needed with regard to the pedagogical approach taken by staff in order to cater for a diverse student body comprising a broad range of learner types, and this must be supported both at departmental and institutional levels. Also included is a review of the literature as to what best practice is in supporting the ‘new’ third level student. To conclude I look at what the future may hold for third level institutes catering for this ‘new’ student type.
http://arrow.dit.ie/scschcpsart/1
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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
(2010)
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
(2010)
Abstract:
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 reasons why pupils find these topics difficult. Finally it was intended to develop, implement and evaluate materials and strategies that aimed to alleviate difficulties in the learning and understanding of these topics for pupils studying Chemistry in Ireland. There were three distinct phases in this investigation. Phase one involved the development of four questionnaires: for pupils at Junior Cycle, Leaving Cycle, Leaving Certificate Chemistry teachers and third level science and engineering students. These questionnaires consisted of a list of the different Chemistry topics studied at each level attached to a Likert scale, which asked pupils to give their opinion on the level of difficulty of the Chemistry topics. The views of practicing Chemistry teachers were also...
http://hdl.handle.net/10344/432
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Enhancing Forensic Science Context-based Laboratory Activities for Undergraduate Chemistry Students
(2007)
Cresswell, Sarah; Fox, John; Mc Donnell, Claire; O'Connor, Christine; O'Donne...
Enhancing Forensic Science Context-based Laboratory Activities for Undergraduate Chemistry Students
(2007)
Cresswell, Sarah; Fox, John; Mc Donnell, Claire; O'Connor, Christine; O'Donnell, Cora; Seery, Michael
Abstract:
<p>This paper discusses the development of student centred context-based practical activities for use in third level Forensic Science/ Chemical Analysis courses.</p>
http://arrow.dit.ie/scschcpscon/9
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Electrochemistry and application of a novel monosubstituted squarate electron-transfer mediator in a glucose oxidase-doped poly(phenol) sensor
(2004)
Iwuoha, Emmanuel I.; Williams-Dottin, Avril R.; Hall, Lincoln A.; Morrin, Aoife; Matheb...
Electrochemistry and application of a novel monosubstituted squarate electron-transfer mediator in a glucose oxidase-doped poly(phenol) sensor
(2004)
Iwuoha, Emmanuel I.; Williams-Dottin, Avril R.; Hall, Lincoln A.; Morrin, Aoife; Mathebe, Gretta N.; Smyth, Malcolm R.; Killard, Anthony J.
Abstract:
Electrosynthetic poly(phenol) nanofilms were deposited in situ on platinum electrodes in the presence and absence of glucose oxidase. The synthesis charges and currents of the nonconducting polymer films were recorded at various applied potentials for films grown from 25–100 mM phenol concentrations. Film parameters such as the standard rate constant for film deposition, film thickness, and surface concentration of the poly(phenol) films were evaluated from the cyclic and step voltammograms of the polymerization process. A novel electron-transfer mediator consisting of monosubstituted 4-hydroxycyclobut-3-ene-1,2-dione (squarate) was used as a mediator for Pt/poly(phenol) nano-film/GOx amperometric glucose biosensors. Amperometric responses for 3-diphenylamino-4-hydroxycyclobut-3-ene-1,2- dione (diphenylaminosquarate: E°′ = of +328 mV/Ag-AgCl at pH 7.0)-mediated systems were measured by both steady-state amperometric and cyclic voltammetry. The sensor sensitivity was calculated to be...
http://doras.dcu.ie/55/
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Quinoline synthesis: scope and regiochemistry of photocyclisation of substituted benzylidenecyclopentanone O-alkyl and O-acetyloximes
(2007)
Austin, Mark; Egan, Oliver J.; Tully, Raymond; Pratt, Albert C.
Quinoline synthesis: scope and regiochemistry of photocyclisation of substituted benzylidenecyclopentanone O-alkyl and O-acetyloximes
(2007)
Austin, Mark; Egan, Oliver J.; Tully, Raymond; Pratt, Albert C.
Abstract:
Irradiation of substituted 2-benzylidenecyclopentanone O-alkyl and O-acetyloximes in methanol provides a convenient synthesis of alkyl, alkoxy, hydroxy, acetoxy, amino, dimethylamino and benzo substituted annulated quinolines. para-Substituents yield 6-substituted-2,3-dihydro-1H-cyclopenta[b]quinolines with 8-substituted products being obtained from ortho-substituted starting materials. Reactions of meta-substituted precursors are highly regioselective, with alkyl substituents leading to 5-substituted 2,3-dihydro-1H-cyclopenta[b]quinolines and more strongly electron-donating substituents generally resulting in 7-substituted products. 2-Furylmethylene and 2-thienylmethylene analogues yield annulated furo- and thieno-[2,3e]pyridines respectively. Sequential E- to Z-benzylidene group isomerisation and six [pi]-electron cyclisation steps result in formation of a short-lived dihydroquinoline intermediate which spontaneously aromatises by elimination of an alcohol or acetic acid. For 2-be...
http://doras.dcu.ie/119/
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Exploring evolutionary stability in a concurrent artificial chemistry
(2008)
Decraene, James; Mitchell, George G.; McMullin, Barry
Exploring evolutionary stability in a concurrent artificial chemistry
(2008)
Decraene, James; Mitchell, George G.; McMullin, Barry
Abstract:
Multi-level selection has proven to be an affective mean to provide resistance against parasites for catalytic networks (Cronhjort and Blomberg, 1997). One way to implement these multi-level systems is to group molecules into several distinct compartments (cells) which are capable of cellular division (where an offspring cell replaces another cell). In such systems parasitized cells decay and are ultimately displaced by neighboring healthy cells. However in relatively small cellular populations, it is also possible that infected cells may rapidly spread parasites throughout the entire cellular population. In which case, group selection may fail to provide resistance to parasites. In this paper, we propose a concurrent artificial chemistry (AC) which has been implemented on a cluster of computers where each cell is running on a single CPU. This multi-level selectional artificial chemistry called the Molecular Classifier Systems was based on the Holland broadcast language. An attribut...
http://doras.dcu.ie/4597/
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Addressing the learning of chemistry at undergraduate level: towards the development of independent learning
(2009)
Lovatt, James
Addressing the learning of chemistry at undergraduate level: towards the development of independent learning
(2009)
Lovatt, James
Abstract:
A key focus of education is to encourage and provide opportunities for learning. Recent research in science education has identified challenges in teaching and learning of science such as declining student engagement, provision of appropriate assessment and transition between various stages of formal education. This study addresses these challenges. Firstly, the students’ profiles was determined both as the student entered university and then as they progressed through their study. The profile includes an indication of the students’ motivation, their preparedness for university, their expectations of university, their interaction with learning supports and their approaches to learning at university. In this study, varied and changing student profiles have been observed. It has been shown that factors including student ‘interest’, ‘learning responsibilities’, ‘student attendance’ and their ‘approaches to learning’ are positively correlated with academic achievement. It has also been...
http://doras.dcu.ie/14891/
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Putting the Student in Charge: Adding Value to the Food Chemistry Laboratory Through Student Generated Experiments, Integration of Transferable Skills and Peer and Audio Feedback
(2011)
Dunne, Julie
Putting the Student in Charge: Adding Value to the Food Chemistry Laboratory Through Student Generated Experiments, Integration of Transferable Skills and Peer and Audio Feedback
(2011)
Dunne, Julie
Abstract:
<p>This paper describes the implementation of an alternative laboratory practical for a group of third year BSc Nutraceuticals students. The main objectives were to prepare students for the more independent final year research project; to incorporate innovative approaches to feedback; and to integrate key employability skills into the curriculum. These were achieved through building the skills required to ultimately allow students working in groups to research, design and run a laboratory for their class. The project involved innovative approaches to feedback, including weekly feedback sessions, report checklists and audio feedback podcasts. The feedback has been particularly well received, and there is evidence that it will be reusable and will ‘feed-forward’ to other modules. The author, and the students in general, believe the group are more prepared for final year research projects and work placement owing to the redesign of the laboratory assessment.</p>
http://arrow.dit.ie/schfsehcon/6
Marked
Mark
Functionalisation of bolaamphiphiles with mononuclear bis(2,2'-bipyridyl)ruthenium(II) complexes for application in self assembled monolayers
(2006)
Killeen, Jonathan Scott; Browne, Wesley R.; Skupin, Marc; Fuhrhop, Jurgen-Hinrich; Vos,...
Functionalisation of bolaamphiphiles with mononuclear bis(2,2'-bipyridyl)ruthenium(II) complexes for application in self assembled monolayers
(2006)
Killeen, Jonathan Scott; Browne, Wesley R.; Skupin, Marc; Fuhrhop, Jurgen-Hinrich; Vos, Johannes G.
Abstract:
A novel ruthenium(II) polypyridyl complex connected competently to a bolaamphiphile, containing amide linkages to provide rigidity via hydrogen bonding in the monolayer, has been prepared. The ruthenium(II) complexes of this ligand and of the intermediates in the synthesis were prepared by modification of the coordinated ligands, demonstrating the synthetic versatility and robustness of this family of complexes. All ruthenium complexes were characterised by electrochemical and spectroscopic techniques and were found to have similar properties to the parent complex [Ru(bipy)[3]][2][+], and remain versatile photosensitisers, with well-defined properties, despite extensive substitution of the bipy ligand.
http://doras.dcu.ie/31/
Marked
Mark
Polystyrene bead-based system for optical sensing using spiropyran photoswitches
(2008)
Scarmagnani, Silvia; Walsh, Zarah; Slater, Conor; Alhashimy, Nameer; Macka, Mirek; Paul...
Polystyrene bead-based system for optical sensing using spiropyran photoswitches
(2008)
Scarmagnani, Silvia; Walsh, Zarah; Slater, Conor; Alhashimy, Nameer; Macka, Mirek; Paull, Brett; Diamond, Dermot
Abstract:
Spiropyran derivatives have been immobilised on the surface of polystyrene microbeads using different immobilisation strategies. These functionalised polymeric beads can be reversibly switched between the colourless inactive spiropyran (SP) and highly coloured (purple) active merocyanine (MC) forms using low power light sources, such as light-emitting diodes (LEDs). A UV LED (375 nm) is used for the SP /MC conversion, and a white LED (430–760 nm) for the reverse MC/ SP conversion. The photochromic behaviour of the coated beads has been characterised using different LEDs and reflection spectroscopy, employing optic fibres and an in-house-designed holder. Investigations into the metal-ion binding behaviour of the spiropyran-modified microbeads have shown that Cu2+ ions cause an appreciable colour and spectral change when brought into contact with the beads in the MC form, suggesting that a significant interaction is occurring. However, the Cu2+ ions can be completely expelled by photo...
http://doras.dcu.ie/661/
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