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Outputs (43)

Short- and long-term effects of a dentifrice containing dual zinc plus arginine on intra-oral halitosis: Improvements in breath quality (2018)
Journal Article
Saad, S., Fitzgerald, M., Hewett, K., Greenman, J., Vandeven, M., Trivedi, H., & Masters, J. (2018). Short- and long-term effects of a dentifrice containing dual zinc plus arginine on intra-oral halitosis: Improvements in breath quality. Journal of Clinical Dentistry, 29(3 (Special Issue A)), 46-54

Objectives: These studies aimed to assess the short-term (12-hour, single use) and long-term (four weeks, continuous use) efficacy of a new Dual Zinc plus Arginine dentifrice against intra-oral halitosis versus a negative control. Methods: Two cl... Read More about Short- and long-term effects of a dentifrice containing dual zinc plus arginine on intra-oral halitosis: Improvements in breath quality.

Synthesis and bactericidal properties of porphyrins immobilized in a polyacrylamide support: Influence of metal complexation on photoactivity (2017)
Journal Article
Boyle, R. W., Turner, L. C., Spagnul, C., Turner, L., Giuntini, F., & Greenman, J. (2017). Synthesis and bactericidal properties of porphyrins immobilized in a polyacrylamide support: Influence of metal complexation on photoactivity. Journal of Materials Chemistry B, 5(9), 1834-1845. https://doi.org/10.1039/c6tb03198f

© The Royal Society of Chemistry. Spectroscopic and photodynamic properties of three novel polymeric hydrogels bearing porphyrins have been studied in vitro on the recombinant bioluminescent Gram-negative Escherichia coli DH5α to assess their ability... Read More about Synthesis and bactericidal properties of porphyrins immobilized in a polyacrylamide support: Influence of metal complexation on photoactivity.

Daily reduction of oral malodor with the use of a sonic tongue brush combined with an antibacterial tongue spray in a randomized cross-over clinical investigation (2016)
Journal Article
Saad, S., Gomez-Pereira, P., Hewett, K., Horstman, P., Patel, J., & Greenman, J. (2016). Daily reduction of oral malodor with the use of a sonic tongue brush combined with an antibacterial tongue spray in a randomized cross-over clinical investigation. Journal of Breath Research, 10(1), 13-16. https://doi.org/10.1088/1752-7155/10/1/016013

Abstract The objective of this clinical investigation was to test the effectiveness on breath odor of a newly designed sonic tongue brush (TongueCare+, TC). It consists of a soft silicone brush optimally designed based on the tongue's anatomy t... Read More about Daily reduction of oral malodor with the use of a sonic tongue brush combined with an antibacterial tongue spray in a randomized cross-over clinical investigation.

Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria (2016)
Journal Article
Spagnul, C., Greenman, J., Wainwright, M., Kamil, Z., & Boyle, R. W. (2016). Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria. Journal of Materials Chemistry B, 4(8), 1499-1509. https://doi.org/10.1039/c5tb02569a

© 2016 The Royal Society of Chemistry. In 2013, the World Health Organization reported that 884 million people lack access to clean potable water. Photodynamic antimicrobial chemotherapy (PACT) is a very promising alternative to conventional antibiot... Read More about Synthesis, characterization and biological evaluation of a new photoactive hydrogel against Gram-positive and Gram-negative bacteria.

Analysis of microbial fuel cell operation in acidic conditions using the flocculating agent ferric chloride (2016)
Journal Article
Winfield, J., Greenman, J., Dennis, J., & Ieropoulos, I. (2016). Analysis of microbial fuel cell operation in acidic conditions using the flocculating agent ferric chloride. Journal of Chemical Technology and Biotechnology, 91(1), 138-143. https://doi.org/10.1002/jctb.4552

© 2014 Society of Chemical Industry. BACKGROUND: Ferric chloride (FeCl3) is widely used as a flocculating agent during wastewater treatment but can detrimentally lower pH and increase iron concentration. Microbial fuel cells (MFCs) are a promising te... Read More about Analysis of microbial fuel cell operation in acidic conditions using the flocculating agent ferric chloride.

Volatiles from oral anaerobes confounding breath biomarker discovery (2013)
Journal Article
De Lacy Costello, B., Khalid, T. Y., Ratcliffe, N. M., Khalid, T., Saad, S., Greenman, J., …Ratcliffe, N. M. (2013). Volatiles from oral anaerobes confounding breath biomarker discovery. Journal of Breath Research, 7(1), https://doi.org/10.1088/1752-7155/7/1/017114

The levels of compounds in exhaled mouth air do not necessarily reflect levels in the systemic circulation as bacteria can bio-transform substrates to produce compounds within the mouth. This should be of concern to researchers measuring breath volat... Read More about Volatiles from oral anaerobes confounding breath biomarker discovery.

The first self-sustainable microbial fuel cell stack (2013)
Journal Article
Ledezma, P., Stinchcombe, A., Greenman, J., & Ieropoulos, I. (2013). The first self-sustainable microbial fuel cell stack. Physical Chemistry Chemical Physics, 15(7), 2278-2281. https://doi.org/10.1039/c2cp44548d

This study reports for the first time on the development of a self-sustainable microbial fuel cell stack capable of self-maintenance (feeding, hydration, sensing & reporting). Furthermore, the stack system is producing excess energy, which can be use... Read More about The first self-sustainable microbial fuel cell stack.

Bi-directional electrical characterisation of microbial fuel cell (2013)
Journal Article
Ieropoulos, I. A., Greenman, J., Ledezma, P., Degrenne, N., Ledezma, P., Bevilacqua, P., …Ieropoulos, I. (2013). Bi-directional electrical characterisation of microbial fuel cell. Bioresource Technology, 128, 769-773. https://doi.org/10.1016/j.biortech.2012.10.110

The electrical performance of microbial fuel cells in steady-state is usually investigated by standard characterisation methods that reveal many important parameters e.g. maximum power. This paper introduces a novel " bi-directional" method to study... Read More about Bi-directional electrical characterisation of microbial fuel cell.

MFC-cascade stacks maximise COD reduction and avoid voltage reversal under adverse conditions (2013)
Journal Article
Ledezma, P., Greenman, J., & Ieropoulos, I. (2013). MFC-cascade stacks maximise COD reduction and avoid voltage reversal under adverse conditions. Bioresource Technology, 134, 158-165. https://doi.org/10.1016/j.biortech.2013.01.119

Six continuous-flow Microbial Fuel Cells (MFCs) configured as a vertical cascade and tested under different electrical connections are presented. When in parallel, stable operation and higher power and current densities than individual MFCs were obse... Read More about MFC-cascade stacks maximise COD reduction and avoid voltage reversal under adverse conditions.

Maximising electricity production by controlling the biofilm specific growth rate in microbial fuel cells (2012)
Journal Article
Ledezma, P., Greenman, J., & Ieropoulos, I. (2012). Maximising electricity production by controlling the biofilm specific growth rate in microbial fuel cells. Bioresource Technology, 118, 615-618. https://doi.org/10.1016/j.biortech.2012.05.054

The aim of this work is to study the relationship between growth rate and electricity production in perfusion-electrode microbial fuel cells (MFCs), across a wide range of flow rates by co-measurement of electrical output and changes in population nu... Read More about Maximising electricity production by controlling the biofilm specific growth rate in microbial fuel cells.

Microbial volatile compounds in health and disease conditions (2012)
Journal Article
Thorn, R., & Greenman, J. (2012). Microbial volatile compounds in health and disease conditions. Journal of Breath Research, 6(2), 024001. https://doi.org/10.1088/1752-7155/6/2/024001

Microbial cultures and/or microbial associated diseases often have a characteristic smell. Volatile organic compounds (VOCs) are produced by all microorganisms as part of their normal metabolism. The types and classes of VOC produced is wide, includi... Read More about Microbial volatile compounds in health and disease conditions.

Electrochemically activated solutions: Evidence for antimicrobial efficacy and applications in healthcare environments (2012)
Journal Article
Lee, S. W., Thorn, R., Robinson, G., Greenman, J., & Reynolds, D. M. (2012). Electrochemically activated solutions: Evidence for antimicrobial efficacy and applications in healthcare environments. European Journal of Clinical Microbiology and Infectious Diseases, 31(5), 641-653. https://doi.org/10.1007/s10096-011-1369-9

Due to the limitations associated with the use of existing biocidal agents, there is a need to explore new methods of disinfection to help maintain effective bioburden control, especially within the healthcare environment. The transformation of low m... Read More about Electrochemically activated solutions: Evidence for antimicrobial efficacy and applications in healthcare environments.

Effect of mouth-rinse formulations on oral malodour processes in tongue-derived perfusion biofilm model (2012)
Journal Article
Saad, S., Hewett, K., & Greenman, J. (2012). Effect of mouth-rinse formulations on oral malodour processes in tongue-derived perfusion biofilm model. Journal of Breath Research, 6(1), https://doi.org/10.1088/1752-7155/6/1/016001

An in vitro matrix biofilm perfusion model of tongue-derived microcosms for studying volatile sulfur compound (VSC) biogenesis has been previously described. The model was modified in order to monitor H 2 S in situ by use of a specialized electrode a... Read More about Effect of mouth-rinse formulations on oral malodour processes in tongue-derived perfusion biofilm model.

Comparative effects of various commercially available mouthrinse formulations on oral malodour (2011)
Journal Article
Saad, S., Greenman, J., & Shaw, H. (2011). Comparative effects of various commercially available mouthrinse formulations on oral malodour. Oral Diseases, 17(2), 180-186. https://doi.org/10.1111/j.1601-0825.2010.01714.x

Objectives: The primary aim of this study was to compare a new mouthwash (SB12®) containing 0.025% chlorhexidine and 0.3% zinc for oral malodour reduction against four commercially available mouthwashes and negative control. A secondary aim was to co... Read More about Comparative effects of various commercially available mouthrinse formulations on oral malodour.

Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro (2011)
Journal Article
Thorn, R., Reynolds, D. M., & Greenman, J. (2011). Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro. Journal of Microbiological Methods, 84(2), 258-264. https://doi.org/10.1016/j.mimet.2010.12.001

Volatile compounds (VCs) are produced by all microorganisms as part of their normal metabolism. The aim of this study was to determine whether bacterial VC profiles could be used to discriminate between selected bacterial species and strains in vitro... Read More about Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro.

Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro (2011)
Journal Article
Thorn, R., Reynolds, D. M., & Greenman, J. (2011). Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro. Journal of Microbiological Methods, 84(2), 258-264. https://doi.org/10.1016/j.mimet.2010.12.001

Volatile compounds (VCs) are produced by all microorganisms as part of their normal metabolism. The aim of this study was to determine whether bacterial VC profiles could be used to discriminate between selected bacterial species and strains in vitro... Read More about Multivariate analysis of bacterial volatile compound profiles for discrimination between selected species and strains in vitro.

EcoBot-III: A robot with guts (2010)
Conference Proceeding
Ieropoulos, I., Greenman, J., Melhuish, C., & Horsfield, I. (2010). EcoBot-III: A robot with guts. In H. Fellermann, M. Dörr, M. M. Hanczyc, L. L. Laursen, S. Maurer, D. Merkle, …S. Rasmussen (Eds.), Artificial Life XII: Proceedings of the 12th International Conference on the Synthesis and Simulation of Living Systems, ALIFE 2010. , (733-740)

This paper describes the work carried out to develop EcoBot- III, which is a robot with an artificial digestion system. The robot is powered by Microbial Fuel Cells (MFCs) and it is designed to collect food and water from the environment, digest the... Read More about EcoBot-III: A robot with guts.

Effects of flow-rate, inoculum and time on the internal resistance of microbial fuel cells (2010)
Journal Article
Ieropoulos, I., Winfield, J., & Greenman, J. (2010). Effects of flow-rate, inoculum and time on the internal resistance of microbial fuel cells. Bioresource Technology, 101(10), 3520-3525. https://doi.org/10.1016/j.biortech.2009.12.108

To process large volumes of wastewater, microbial fuel cells (MFCs) would require anodophilic bacteria preferably operating at high flow-rates. The effect of flow-rate on different microbial consortia was examined during anodic biofilm development, u... Read More about Effects of flow-rate, inoculum and time on the internal resistance of microbial fuel cells.

Modelling the effects of pH on tongue biofilm using a sorbarod biofilm perfusion system (2010)
Journal Article
Taylor, B., & Greenman, J. (2010). Modelling the effects of pH on tongue biofilm using a sorbarod biofilm perfusion system. Journal of Breath Research, 4(1), 017107. https://doi.org/10.1088/1752-7155/4/1/017107

The pH of the tongue biofilm is likely to influence microbial composition and ecology with consequent effects on the metabolic activities and generation of volatile sulfur compounds (VSC) and other malodour gasses. The aim of this study was to identi... Read More about Modelling the effects of pH on tongue biofilm using a sorbarod biofilm perfusion system.

Improved energy output levels from small-scale Microbial Fuel Cells (2010)
Journal Article
Ieropoulos, I., Greenman, J., & Melhuish, C. (2010). Improved energy output levels from small-scale Microbial Fuel Cells. Bioelectrochemistry, 78(1), 44-50. https://doi.org/10.1016/j.bioelechem.2009.05.009

This study reports on the findings from the investigation into small-scale (6.25mL) MFCs, connected together as a network of multiple units. The MFCs contained unmodified (no catalyst) carbon fibre electrodes and for initial and later experiments, a... Read More about Improved energy output levels from small-scale Microbial Fuel Cells.

Evaluation of the efficacy of electrochemically activated solutions against nosocomial pathogens and bacterial endospores (2010)
Journal Article
Salisbury, V. C., Robinson, G. M., Lee, S. W., Greenman, J., & Reynolds, D. M. (2010). Evaluation of the efficacy of electrochemically activated solutions against nosocomial pathogens and bacterial endospores. Letters in Applied Microbiology, 50(3), 289-294. https://doi.org/10.1111/j.1472-765X.2009.02790.x

Aims: Electrochemically activated solutions (ECAS) are generated from halide salt solutions via specially designed electrolytic cells. The active solutions are known to possess high biocidal activity against a wide range of target microbial species,... Read More about Evaluation of the efficacy of electrochemically activated solutions against nosocomial pathogens and bacterial endospores.

A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments (2009)
Journal Article
Thorn, R., & Greenman, J. (2009). A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments. Journal of Applied Microbiology, 107(6), 2070-2079. https://doi.org/10.1111/j.1365-2672.2009.04398.x

Aims: To develop an in vitro flat-bed perfusion biofilm model that could be used to determine the antimicrobial efficacy of topically applied treatments. Methods and Results: Pseudomonas aeruginosa and Staphylococcus aureus biofilms were grown within... Read More about A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments.

Peripherals of BES from processing current to data transmission (2009)
Book Chapter
Ieropoulos, I., Greenman, J., Melhuish, C., & Horsfield, I. (2009). Peripherals of BES from processing current to data transmission. In K. Rabaey, L. Angenent, U. Schroder, & J. Keller (Eds.), Bioelectrochemical Systems: From Extracellular Electron Transfer to Biotechnological Applications. London: IWA Publishing

Artificial life models in hardware (2009)
Book
Komosinski, M., Adamatzky, A., Ieropoulos, I., Greenman, J., Melhuish, C., & Horsfield, I. (2009). A. Adamatzky, & M. Komosinski (Eds.), Artificial life models in hardware. London: Spinger-Verlag. https://doi.org/10.1007/978-1-84882-530-7

Hopping, climbing and swimming robots, nano-size neural networks, motorless walkers, slime mould and chemical brains - 'Artificial Life Models in Hardware' offers unique designs and prototypes of life-like creatures in conventional hardware and hybri... Read More about Artificial life models in hardware.

Landfill leachate treatment with microbial fuel cells; scale-up through plurality (2009)
Journal Article
Gálvez, A., Greenman, J., & Ieropoulos, I. (2009). Landfill leachate treatment with microbial fuel cells; scale-up through plurality. Bioresource Technology, 100(21), 5085-5091. https://doi.org/10.1016/j.biortech.2009.05.061

Three Microbial Fuel Cells (MFCs) were fluidically connected in series, with a single feed-line going into the 1st column through the 2nd column and finally as a single outflow coming from the 3rd column. Provision was also made for re-circulation in... Read More about Landfill leachate treatment with microbial fuel cells; scale-up through plurality.

Models of tongue malodour (review) (2009)
Presentation / Conference
Greenman, J. (2009, April). Models of tongue malodour (review). Paper presented at BREATH 2009 International Conference on Breath and Breath Odor Research, Dortmund, Germany

Volatiles from oral anaerobes (2009)
Presentation / Conference
Khalid, T., Ratcliffe, N. M., de Lacy Costello, B., Greenman, J., & Saad, S. (2009, April). Volatiles from oral anaerobes. Paper presented at BREATH 2009 International Conference on Breath and Breath Odor Research, Dortmund Germany

In vitro model of tongue malodour (2009)
Presentation / Conference
Greenman, J. (2009, April). In vitro model of tongue malodour. Paper presented at BREATH 2009 International Conference on Breath and Breath Odor Research, Dortmund, Germany

Relating breath malodour to food constituents and oral health (2009)
Book Chapter
Greenman, J., & Benkara Mostefa Saad, S. (2009). Relating breath malodour to food constituents and oral health. In M. Wilson (Ed.), Food constituents and oral health: Current status and future prospects. Woodhead Publishing Limited

Electricity from landfill leachate using microbial fuel cells: Comparison with a biological aerated filter (2009)
Journal Article
Gálvez, A., Greenman, J., Giusti, L., & Ieropoulos, I. (2009). Electricity from landfill leachate using microbial fuel cells: Comparison with a biological aerated filter. Enzyme and Microbial Technology, 44(2), 112-119. https://doi.org/10.1016/j.enzmictec.2008.09.012

Four experimental columns were employed in this study to investigate their performance under wastewater treatment conditions. One column was set-up as a biological aerated filter and the remaining three were set-up as microbial fuel cells (MFCs), two... Read More about Electricity from landfill leachate using microbial fuel cells: Comparison with a biological aerated filter.

A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments (2009)
Journal Article
Thorn, R., & Greenman, J. (2009). A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments. Journal of Applied Microbiology, 107(6), 2070-2079. https://doi.org/10.1111/j.1365-2672.2009.04398.x

To develop an in vitro flat-bed perfusion biofilm model that could be used to determine the antimicrobial efficacy of topically applied treatments. METHODS AND RESULTS: Pseudomonas aeruginosa and Staphylococcus aureus biofilms were grown within co... Read More about A novel in vitro flat-bed perfusion biofilm model for determining the potential antimicrobial efficacy of topical wound treatments.

Effects of chlorhexidine on a tongue-flora microcosm and VSC production using an in vitro biofilm perfusion model (2008)
Journal Article
Greenman, J., McKenzie, C., Saad, S., Wiegand, B., & Zguris, J. C. (2008). Effects of chlorhexidine on a tongue-flora microcosm and VSC production using an in vitro biofilm perfusion model. Journal of Breath Research, 2(4), 046005. https://doi.org/10.1088/1752-7155/2/4/046005

An in vitro perfusion biofilm model, derived from tongue-scrape microflora removed from one individual, was employed to study sulfide biogenesis and the effects of repeated exposure to chlorhexidine (CHX). Volatile sulfur compounds (VSC) were measure... Read More about Effects of chlorhexidine on a tongue-flora microcosm and VSC production using an in vitro biofilm perfusion model.

Microbial fuel cells based on carbon veil electrodes: Stack configuration and scalability (2008)
Journal Article
Ieropoulos, I., Greenman, J., & Melhuish, C. (2008). Microbial fuel cells based on carbon veil electrodes: Stack configuration and scalability. International Journal of Energy Research, 32(13), 1228-1240. https://doi.org/10.1002/er.1419

The aim of this study was to compare the performance of three different sizes of microbial fuel cell (MFC) when operated under continuous flow conditions using acetate as the fuel substrate and show how small-scale multiple units may be best configur... Read More about Microbial fuel cells based on carbon veil electrodes: Stack configuration and scalability.

Monitoring indoles and diamines: A screen-printed sensors and biosensors approach (2008)
Presentation / Conference
McGuire, N. D., Greenman, J., Bradshaw, D., & Hart, J. P. (2008, September). Monitoring indoles and diamines: A screen-printed sensors and biosensors approach. Paper presented at Electrochemistry Group Faraday and Analytical Division, Royal Society of Chemistry, Electrochemical Technology Group, Society of Chemical Industry, University of Liverpool, UK

Tongue biofilm areal density and tongue coating index (2008)
Journal Article
Saad, S., & Greenman, J. (2008). Tongue biofilm areal density and tongue coating index. Journal of Breath Research, 2(1), https://doi.org/10.1088/1752-7155/2/1/017008

Two methods have been employed to measure the amount of tongue biofilm in humans: (1) areal density of microbes (cfu cm-2) (tongue scrape from a known/measured area), or (2) a tongue-coating index, where a human judge assesses the amount of 'coating'... Read More about Tongue biofilm areal density and tongue coating index.

Modelling oral malodour from a tongue biofilm (2008)
Journal Article
Hess, J., Greenman, J., & Duffield, J. (2008). Modelling oral malodour from a tongue biofilm. Journal of Breath Research, 2(1), 017003. https://doi.org/10.1088/1752-7155/2/1/017003

A new model about the genesis of malodour emanating from the tongue is introduced. A new approach uses mathematical formulae to combine existing empirical knowledge and bring it into context. The resulting description of halitosis includes the three-... Read More about Modelling oral malodour from a tongue biofilm.

Artificial gills for robots: MFC behaviour in water (2007)
Journal Article
Ieropoulos, I., Melhuish, C., & Greenman, J. (2007). Artificial gills for robots: MFC behaviour in water. Bioinspiration and Biomimetics, 2(3), S83. https://doi.org/10.1088/1748-3182/2/3/S02

This paper reports on the first stage in developing microbial fuel cells (MFCs) which can operate underwater by utilizing dissolved oxygen. In this context, the cathodic half-cell is likened to an artificial gill. Such an underwater power generator h... Read More about Artificial gills for robots: MFC behaviour in water.

Development of vapour phase, screen printed amperometric sensors for the measurement of indole and skatole: application to their determination in oral malodour
Presentation / Conference
McGuire, N. D., Greenman, J., Bradshaw, D., & Hart, J. P. Development of vapour phase, screen printed amperometric sensors for the measurement of indole and skatole: application to their determination in oral malodour. Paper presented at Great Western Electrochemistry Group (6th Annual Meeting), University of Bath