| 1. |
- Hall, C. Michael, et al.
(författare)
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Denying bogus skepticism in climate change and tourism research.
- 2015
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Ingår i: Tourism Management. - : Elsevier BV. - 0261-5177 .- 1879-3193. ; 47, s. 352-356
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Tidskriftsartikel (refereegranskat)abstract
- This final response to the two climate change denial papers by Shani and Arad further highlights the inaccuracies, misinformation and errors in their commentaries. The obfuscation of scientific research and the consensus on anthropogenic climate change may have significant long-term negative consequences for better understanding the implications of climate change and climate policy for tourism and create confusion and delay in developing and implementing tourism sector responses.
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| 2. |
- Hall, C. Michael, et al.
(författare)
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No time for smokescreen skepticism : A rejoinder to Shani and Arad
- 2015
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Ingår i: Tourism Management. - : Elsevier BV. - 0261-5177 .- 1879-3193. ; 47, s. 341-347
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Tidskriftsartikel (refereegranskat)abstract
- Shani and Arad (2014) claimed that tourism scholars tend to endorse the most pessimistic assessments regarding climate change, and that anthropogenic climate change was a "fashionable" and "highly controversial scientific topic". This brief rejoinder provides the balance that is missing from such climate change denial and skepticism studies on climate change and tourism. Recent research provides substantial evidence that reports on anthropogenic climate change are accurate, and that human-induced greenhouse gas emissions, including from the tourism industry, play a significant role in climate change. Some positive net effects may be experienced by some destinations in the short-term, but in the long-term all elements of the tourism system will be impacted. The expansion of tourism emissions at a rate greater than efficiency gains means that it is increasingly urgent that the tourism sector acknowledge, accept and respond to climate change. Debate on tourism-related adaptation and mitigation measures is to be encouraged and welcomed. Climate change denial is not.
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| 6. |
- Golker, Kerstin, 1969-
(författare)
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Fundamental Studies on Molecularly Imprinted Materials
- 2014
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- The thesis focuses on fundamental studies aimed at elucidating factors that influence molecularly imprinted polymer (MIP) formation and ligand recognition. To this end, a series of computational techniques, in particular chemometrics and molecular dynamics (MD) in conjunction with polymer synthesis and physical characterization studies have been employed. In Paper I, the multivariate analysis method principal component analysis (PCA) was used to investigate the role of incubation media on polymer-ligand recognition, and results highlighted the importance of several solvent parameters on recognition. In Paper II, all-component MD simulations were used to examine the role of polymerization mixture stoichiometry on MIP-template recognition. Correlations between nature and extent of template complexation and recognition were observed. The influence of the acidic functionality of the methacrylic acid used in these polymers on polymer-template recognition and morphology was examined in Paper III. PCA was then used in Paper IV to identify relationships between interactions in the pre-polymerization mixture, polymer functionality, recognition and morphology using the polymers described in Paper II and III.
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| 7. |
- Henschel, Henning, et al.
(författare)
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Effect of the cross-linker on the general performance and temperature dependent behaviour of a molecularly imprinted polymer catalyst of a Diels-Alder reaction
- 2011
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Ingår i: Journal of Molecular Catalysis B. - : Elsevier BV. - 1381-1177 .- 1873-3158. ; 72:3-4, s. 199-205
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Tidskriftsartikel (refereegranskat)abstract
- Here we present a series of molecularly imprinted polymers capable of catalysing the Diels-Alder reaction between benzyl 1,3-butadienylcarbamate (1) and N,N-dimethyl acrylamide (2). The polymer systems studied here demonstrated an unusual cross-linker and temperature dependent behaviour, namely that polymer catalysis of the Diels-Alder reaction was lower at elevated temperature, in contrast to the solution reaction. Furthermore, not only was the catalytic activity significantly influenced by the choice of cross-linker, but in a similar fashion also the extent of the temperature effect, indicating a close relationship between catalysis and the observed inhibition. Molecular dynamics simulations of both the polymer systems studied were used to provide insight into the molecular background of transition state stabilisation, and differences in properties of the systems based on different cross-linkers.
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| 9. |
- Kirsch, Nicole, et al.
(författare)
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Molecularly imprinted polymer catalysis of a Diels-Alder reaction
- 2009
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Ingår i: Journal of Molecular Catalysis B. - : Elsevier BV. - 1381-1177 .- 1873-3158. ; 58:1-4, s. 110-117
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Tidskriftsartikel (refereegranskat)abstract
- A series of synthetic polymers were designed and synthesized for enhancing the rate of the Diels-Alder cycloaddition reaction of 1,3-butadiene carbamic acid benzyl ester (11) and N,N-dimethyl acrylamide (2), to yield the corresponding endo- (3) and exo- (4) reaction products. Putative transition state analogues (TSAs) for the endo- (5) and exo- (6) reaction pathways were used as templates for the synthesis of molecularly imprinted methacrylic acid (MAA)-divinylbenzene (DVB) copolymers. The polymer system utilized was selected based upon a series of (1)H NMR studies of complex formation between template and a functional monomer analogue (K(d) (app) approximate to 70 mM, d(8)-toluene, 293 K). Batch binding studies revealed that the imprinted polymers were selective for the TSA corresponding to the template used in the polymer synthesis. Studies on the influence of the polymers on the catalysis of the reaction of 1 and 2 demonstrated a 20-fold enhancement of the rate of the reaction relative to the solution reaction. A surprising temperature dependence of the reaction of 1 and 2 in the presence of the polymers was observed, which provides support for the role of template-functional monomer complexes in the catalysis of the Diels-Alder reaction.
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