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Hepatotoxic-microcystins in two drinking water reservoirs in the central region of Ghana. (2017)
Journal Article
ADDICO, G.N.D., LAWTON, L. and EDWARDS, C. 2017. Hepatotoxic-microcystins in two drinking water reservoirs in the central region of Ghana. Toxicology and forensic medicine [online], 2(1), pages 1-11. Available from: https://doi.org/10.17140/TFMOJ-2-111

Background: Microcystins are cyclic peptides containing seven amino acids with the condensation of two terminal amino acids of the linear peptide to form a cyclic compound. The cyclic nature of microcystins suggests that they are highly stable in wat... Read More about Hepatotoxic-microcystins in two drinking water reservoirs in the central region of Ghana..

Archaeological medicinal earths as antibacterial agents: the case of the Basel Lemnian sphragides. (2017)
Journal Article
PHOTOS-JONES, E., EDWARDS, C., HANER, F., LAWTON, L., KEAN, C., LEANORD, A. and PERDIKATSIS, V. 2017. Archaeological medicinal earths as antibacterial agents: the case of the Basel Lemnian sphragides. Geological society: special publications. Geology and medicine: historical connections [online], 452, pages 141-153. Available from: https://doi.org/10.1144/SP452.6

This paper presents the scientific investigation of three Lemnian sphragides (terra sigillata), a famed medicinal clay (earth) of antiquity, dated to the 16th-17th century, and presently in the collection of the Museum for the History of Pharmacy of... Read More about Archaeological medicinal earths as antibacterial agents: the case of the Basel Lemnian sphragides..

Mixing regime simulation and cellulose particle tracing in a stacked frame photocatalytic reactor. (2016)
Journal Article
NAGARAJAN, S., STELLA, L., LAWTON, L.A., IRVINE, J.T.S. and ROBERTSON, P.K.J. 2017. Mixing regime simulation and cellulose particle tracing in a stacked frame photocatalytic reactor. Chemical engineering journal [online], 313, pages 301-308. Available from: https://doi.org/10.1016/j.cej.2016.12.016

To sustainably meet the global energy demand, unconventional methods to produce renewable energy must emerge. Biofuels from cellulose (via fermentable sugar production) mediated via photocatalysis provides an alternative to conventional fossil fuels.... Read More about Mixing regime simulation and cellulose particle tracing in a stacked frame photocatalytic reactor..

Comparative assessment of visible light and UV active photocatalysts by hydroxyl radical quantification. (2016)
Journal Article
NAGARAJAN, S., SKILLEN, N.C., FINA, F., ZHANG, G., RANDORN, C., LAWTON, L.A., IRVINE, J.T.S. and ROBERTSON, P.K.J. 2016. Comparative assessment of visible light and UV active photocatalysts by hydroxyl radical quantification. Journal of photochemistry and photobiology A: chemistry [online], 334, pages 13-19. Available from: https://doi.org/10.1016/j.jphotochem.2016.10.034

A simple method for determining hydroxyl radical yields on semiconductor photocatalysts is highly desirable, especially when comparing different photocatalyst materials. This paper reports the screening of a selection of visible light active photocat... Read More about Comparative assessment of visible light and UV active photocatalysts by hydroxyl radical quantification..

Evidence for functional drift of bacterial isolates in response to cyanobacterial microcystin-lr and multiple peptide degradation in paucibacter toxinivorans. (2016)
Thesis
KREITZ, J. 2016. Evidence for functional drift of bacterial isolates in response to cyanobacterial microcystin-lr and multiple peptide degradation in paucibacter toxinivorans. Robert Gordon University, MPhil thesis.

Bacterial bioremediation has been proposed as an efficient, low cost and ecologically safe method to clean vital water reservoirs from cyanobacterial peptide toxins microcystins (MCs). In previous work carried out in 2008 several bacteria were isolat... Read More about Evidence for functional drift of bacterial isolates in response to cyanobacterial microcystin-lr and multiple peptide degradation in paucibacter toxinivorans..

Accumulation and detoxication responses of the gastropod Lymnaea stagnalis to single and combined exposures to natural (cyanobacteria) and anthropogenic (the herbicide RoundUp® Flash) stressors. (2016)
Journal Article
LANCE, E., DESPRAT, J., HOLBECH, B.F., GERARD, C., BORMANS, M., LAWTON, L.A., EDWARDS, C. and WIEGAND, C. 2016. Accumulation and detoxication responses of the gastropod Lymnaea stagnalis to single and combined exposures to natural (cyanobacteria) and anthropogenic (the herbicide RoundUp® Flash) stressors. Aquatic toxicology [online], 177, pages 116-124. Available from: https://doi.org/10.1016/j.aquatox.2016.05.024

Freshwater gastropods are increasingly exposed to multiple stressors in the field such as the herbicide glyphosate in Roundup formulations and cyanobacterial blooms either producing or not producing microcystins (MCs), potentially leading to interact... Read More about Accumulation and detoxication responses of the gastropod Lymnaea stagnalis to single and combined exposures to natural (cyanobacteria) and anthropogenic (the herbicide RoundUp® Flash) stressors..

Lack of functional redundancy in the relationship between microbial diversity and ecosystem functioning. (2016)
Journal Article
DELGADO-BAQUERIZO, M., GIARAMIDA, L., REICH, P.B., KHACHANE, A.N., HAMONTS, K., EDWARDS, C., LAWTON, L.A. and SINGH, B.K. 2016. Lack of functional redundancy in the relationship between microbial diversity and ecosystem functioning. Journal of ecology [online], 104(4), pages 936-946. Available from: https://doi.org/10.1111/1365-2745.12585

1. Biodiversity is declining worldwide with detrimental effects on ecosystems. However, we lack a quantitative understanding of the shape of the relationship between microbial biodiversity and ecosystem function (BEF). This limits our understanding o... Read More about Lack of functional redundancy in the relationship between microbial diversity and ecosystem functioning..

An investigation on the effects of cyanopeptides on the growth and secondary metabolite production of Microcystis aeruginosa PCC7806. (2016)
Thesis
ARIF ABDUL RAHMAN, T. 2016. An investigation on the effects of cyanopeptides on the growth and secondary metabolite production of Microcystis aeruginosa PCC7806. Robert Gordon University, PhD thesis.

Cyanobacteria are one of the oldest forms of photosynthetic life and may have contributed significantly to the evolution of oxygen into the then anoxic environment. Cyanobacteria are also one of the best sources of natural secondary metabolites (cyan... Read More about An investigation on the effects of cyanopeptides on the growth and secondary metabolite production of Microcystis aeruginosa PCC7806..

Controlled periodic illumination in semiconductor photocatalysis. (2015)
Journal Article
TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2015. Controlled periodic illumination in semiconductor photocatalysis. Journal of photochemistry and photobiology A: chemistry [online], 319-320, pages 96-106. Available from: https://doi.org/10.1016/j.jphotochem.2015.12.002

Controlled periodic illumination is a hypothesis postulated in the early 1990s for enhancing the efficiency of semiconductor photocatalytic reactions. This technique has been proposed to improve photocatalytic efficiency by the nature of photon intro... Read More about Controlled periodic illumination in semiconductor photocatalysis..

Simultaneous cellulose conversion and hydrogen production assisted by cellulose decomposition under UV-light photcatalysis. (2015)
Journal Article
ZHANG, G., NI, C., HUANG, X., WELGARMAGE, A., LAWTON, L.A., ROBERTSON, P.K.J. and IRVINE, J.T.S. 2016. Simultaneous cellulose conversion and hydrogen production assisted by cellulose decomposition under UV-light photcatalysis. Chemical communications [online], 52, pages 1673-1676. Available from: https://doi.org/10.1039/c5cc09075j

Photocatalytic conversion of cellulose to sugars and carbon dioxide with simultaneous production of hydrogen assisted by cellulose decomposition under UV or solar light irradiation was achieved upon immobilization of cellulose onto a TiO2 photocataly... Read More about Simultaneous cellulose conversion and hydrogen production assisted by cellulose decomposition under UV-light photcatalysis..

Rapid bioassay-guided isolation of antibacterial clerodane type diterpenoid from Dodonaea viscosa (L.) Jaeq. (2015)
Journal Article
KHURRAM, M., LAWTON, L.A., EDWARDS, C., IRITI, M., HAMEED, A., KHAN, M.A., KHAN, F.A. and RAHMAN, S.U. 2015. Rapid bioassay-guided isolation of antibacterial clerodane type diterpenoid from Dodonaea viscosa (L.) Jaeq. International journal of molecular science [online], 16(9), pages 20290-20307. Available from: https://doi.org/10.3390/ijms160920290

Plant extracts are complex matrices and, although crude extracts are widely in use, purified compounds are pivotal in drug discovery. This study describes the application of automated preparative-HPLC combined with a rapid off-line bacterial bioassay... Read More about Rapid bioassay-guided isolation of antibacterial clerodane type diterpenoid from Dodonaea viscosa (L.) Jaeq..

Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres. (2015)
Journal Article
PESTANA, C.J., EDWARDS, C., PRABHU, R., ROBERTSON, P.K.J. and LAWTON, L.A. 2015. Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres. Journal of hazardous materials [online], 300, pages 347-353. Available from: https://doi.org/10.1016/j.jhazmat.2015.07.016

Microcystins and nodularin are toxic cyanobacterial secondary metabolites produced by cyanobacteria that pose a threat to human health in drinking water. Conventional water treatment methods often fail to remove these toxins. Advanced oxidation proce... Read More about Photocatalytic degradation of eleven microcystin variants and nodularin by TiO2 coated glass microspheres..

Overcoming the seasonal variations in fitness of the amphipod Corophium Volutator as an environmental toxicology test species using laboratory cultured specimens. (2014)
Thesis
MCGEE, D. 2014. Overcoming the seasonal variations in fitness of the amphipod Corophium Volutator as an environmental toxicology test species using laboratory cultured specimens. Robert Gordon University, MRes thesis.

The marine amphipod Corophium volutator is an important source of food for many fish and wading birds, making it an important species in an estuarine environment and a relevant toxicological test species. Historical data has indicated that seasonal v... Read More about Overcoming the seasonal variations in fitness of the amphipod Corophium Volutator as an environmental toxicology test species using laboratory cultured specimens..

Biodesalination: an emerging technology for targeted removal of Na+ and Cl− from seawater by cyanobacteria. (2014)
Journal Article
MINAS, K., KARUNAKARAN, E., BOND, T., GANDY, C., HONSBEIN, A., MADSEN, M., AMEZAGA, J., AMTMANN, A., TEMPLETON, M.R., BIGGS, C.A. and LAWTON, L. 2015. Biodesalination: an emerging technology for targeted removal of Na+ and Cl− from seawater by cyanobacteria. Desalination and water treatment [online], 55(10): selected papers presented at 2015 Desalination for the environment conference: clean water and energy, 11-15 May 2014, Limassol, Cyprus, pages 2647-2668. Available from: https://doi.org/10.1080/19443994.2014.940647

Although desalination by membrane processes is a possible solution to the problem of freshwater supply, related cost and energy demands prohibit its use on a global scale. Hence, there is an emerging necessity for alternative, energy and cost-efficie... Read More about Biodesalination: an emerging technology for targeted removal of Na+ and Cl− from seawater by cyanobacteria..

Sudden flamingo deaths in Kenyan rift valley lakes. (2014)
Journal Article
STRAUBINGER-GANSBERGER, N., GRUBER, M., KAGGWA, M.N., LAWTON, L., ODUOR, S.O. and SCHAGERI, M. 2014. Sudden flamingo deaths in Kenyan rift valley lakes. Wildlife biology [online], 20(3), pages 185-189. Available from: https://doi.org/10.2981/wlb.00018

The East African Rift Valley Lakes Bogoria and Nakuru sometimes host around 75% of the world population of lesser flamingos Phoeniconaias minor. In this area, mysterious flamingo die-offs have occupied researchers for four decades. Recently, cyanobac... Read More about Sudden flamingo deaths in Kenyan rift valley lakes..

Optimisation of high value metabolite production from benthic marine dinoflagellate Prorocentrum lima. (2014)
Thesis
PRAPTIWI, R.A. 2014. Optimisation of high value metabolite production from benthic marine dinoflagellate Prorocentrum lima. Robert Gordon University, PhD thesis.

Toxins produced by harmful algal blooms (HABs) are known to pose contamination risks to seafood products (e.g. fish and shellfish) consumed by human. In order to control contamination risks, monitoring regimes have to be performed rigorously. The eff... Read More about Optimisation of high value metabolite production from benthic marine dinoflagellate Prorocentrum lima..

Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. (2014)
Journal Article
TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination. Applied catalysis B: environmental [online], 156-157, pages 398-403. Available from: https://doi.org/10.1016/j.apcatb.2014.03.046

Quantum yields of the photocatalytic degradation of methyl orange under controlled periodic illumination (CPI) have been modelled using existing models. A modified Langmuir-Hinshelwood (L-H) rate equation was used to predict the degradation reaction... Read More about Mathematical modelling of quantum yield enhancements of methyl orange photooxidation in aqueous TiO2 suspensions under controlled periodic UV LED illumination..

The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. (2014)
Journal Article
TOKODE, O., PRABHU, R., LAWTON, L.A. and ROBERTSON, P.K.J. 2014. The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources. Chemical engineering journal [online], 246, pages 337-342. Available from: https://doi.org/10.1016/j.cej.2014.03.002

The nature of photon interaction and reaction pH can have significant impacts on semiconductor photocatalysis. This paper describes the effect of pH on the photonic efficiency of photocatalytic reactions in the aqueous phase using TiO2 catalysts. The... Read More about The effect of pH on the photonic efficiency of the destruction of methyl orange under controlled periodic illumination with UV-LED sources..

A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2. (2013)
Journal Article
PESTANA, C.J., ROBERTSON, P.K.J., EDWARDS, C., WILHELM, W., MCKENZIE, C. and LAWTON, L.A. 2014. A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2. Chemical engineering journal [online], 235, pages 293-298. Available from: https://doi.org/10.1016/j.cej.2013.09.041

Taste and odour compounds, especially geosmin (GSM) and 2-methylisoborneol (2-MIB), cause major problems in both drinking water and aquaculture industries world-wide. Aquaculture in particular has experienced significant financial losses due to the a... Read More about A continuous flow packed bed photocatalytic reactor for the destruction of 2-methylisoborneol and geosmin utilising pelletised TiO2..

Investigation of the production and isolation of bioactive compounds from cyanobacteria. (2013)
Thesis
HAMEED, S. 2013. Investigation of the production and isolation of bioactive compounds from cyanobacteria. Robert Gordon University, PhD thesis.

Due to heavy nutrient load and adverse climate change the occurrence of toxic cyanobacterial blooms have significantly increased during the last decades. Nodularia spumigena is one of the dominant toxic cyanobacteria which produces massive and inhere... Read More about Investigation of the production and isolation of bioactive compounds from cyanobacteria..