Novel biodegradable and biocompatible poly(3-hydroxyoctanoate)/bacterial cellulose composites

Basnett, P., Knowles, J.C., Pishbin, F., Smith, C.L., Keshavarz, T., Boccaccini, A.R. and Roy, I. 2012. Novel biodegradable and biocompatible poly(3-hydroxyoctanoate)/bacterial cellulose composites. Advanced Engineering Materials. 14 (6), pp. B330-B343.

TitleNovel biodegradable and biocompatible poly(3-hydroxyoctanoate)/bacterial cellulose composites
AuthorsBasnett, P., Knowles, J.C., Pishbin, F., Smith, C.L., Keshavarz, T., Boccaccini, A.R. and Roy, I.
Abstract

Novel poly(3-hydroxyoctanoate), P(3HO), and bacterial cellulose composites have been developed. P(3HO) is hydrophobic in nature whereas bacterial cellulose is extremely hydrophilic in nature. Therefore, homogenized bacterial cellulose has been chemically modified in order to achieve compatibility with the P(3HO) matrix. Modified bacterial cellulose microcrystals and P(3HO) have been physically blended and solvent casted into two-dimensional composite films. Mechanical characterization shows that the Young's modulus of the P(3HO)/bacterial cellulose composites is significantly higher in comparison to the neat P(3HO) film. The melting temperature (Tm) of the composites is lower while the glass transition temperature (Tg) is higher than the neat P(3HO) film. Also, the composite film has a rougher surface topography as compared to the neat P(3HO) film. A month's in vitro degradation study has been carried out in Dulbeccos modified eagle medium and in phosphate buffer saline. The incorporation of modified bacterial cellulose microcrystal in the P(3HO) film has increased the degradability of the composite film. Finally, in vitro biocompatibility studies using human microvascular endothelial cells established the biocompatibility of the P(3HO)/bacterial cellulose microcrystal films. The cell proliferation was 50–110% higher on the P(3HO)/bacterial cellulose composites as compared to the neat P(3HO) film. Hence, in this study, for the first time, P(3HO)/bacterial cellulose composites have been developed. The addition of bacterial cellulose has resulted in properties that are highly desirable for medical applications including the development of biodegradable stents.

JournalAdvanced Engineering Materials
Journal citation14 (6), pp. B330-B343
ISSN1438-1656
YearJun 2012
PublisherWiley
Digital Object Identifier (DOI)doi:10.1002/adem.201180076
Publication dates
PublishedJun 2012

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Fernando, E., Keshavarz, T. and Kyazze, G. 2013. Simultaneous co-metabolic decolourisation of azo dye mixtures and bio-electricity generation under thermophillic (50°C) and saline conditions by an adapted anaerobic mixed culture in microbial fuel cells. Bioresource Technology. 127, pp. 1-8.

Novel methods for the quantification of changes in actin organization in chondrocytes using fluorescent imaging and linear profiling
Qusous, A., Parker, E., Geewan, C., Kapasi, A., Getting, S.J., Hucklebridge, F., Keshavarz, T. and Kerrigan, M.J.P. 2012. Novel methods for the quantification of changes in actin organization in chondrocytes using fluorescent imaging and linear profiling. Microscopy Research and Technique. 75 (7), pp. 991-999.

Expression of melanocortin 3 receptors (MC3) in the reproductive axes of both male and female mice
Dowejko, M.M., Smith, C.L., Getting, S.J., Le Tissier, P. and Murray, J.F. 2012. Expression of melanocortin 3 receptors (MC3) in the reproductive axes of both male and female mice. Society for Reproduction and Fertility. Edinburgh 9th - 11th July 2012

Is quorum sensing involved in lovastatin production in the filamentous fungus Aspergillus terreus?
Raina, S., De Vizio, D., Palonen, E.K., Odell, M., Brandt, A.M., Soini, J.T. and Keshavarz, T. 2012. Is quorum sensing involved in lovastatin production in the filamentous fungus Aspergillus terreus? Process Biochemistry. 47 (5), pp. 843-852.

Poly(3-hydroxybutyrate) production by Bacillus cereus SPV using sugarcane molasses as the main carbon source
Akaraonye, E., Moreno, C., Knowles, J.C., Keshavarz, T. and Roy, I. 2012. Poly(3-hydroxybutyrate) production by Bacillus cereus SPV using sugarcane molasses as the main carbon source. Biotechnology Journal. 7 (2), pp. 293-303.

γ-Heptalactone is an endogenously produced quorum-sensing molecule regulating growth and secondary metabolite production by Aspergillus nidulans
Williams, H.E., Steele, J.C.P., Clements, M.O. and Keshavarz, T. 2012. γ-Heptalactone is an endogenously produced quorum-sensing molecule regulating growth and secondary metabolite production by Aspergillus nidulans. Applied Microbiology and Biotechnology. 96 (3), pp. 773-781.

Alpha thalassaemia and the severity of Plasmodium falciparum infection in microcytic children from the Ashanti region of Ghana
Opoku-Okrah, C., Smith, C.L., Gordge, M.P., Parry, M., Robertson, C.E., Abgenyega, T. and Nakua, E. 2012. Alpha thalassaemia and the severity of Plasmodium falciparum infection in microcytic children from the Ashanti region of Ghana. British Society for Haematology 52nd meeting. Glasgow 16-18 April 2012

A comparison of novel NG, NG-disubstituted arginines on recombinant dimethylarginine dimethylaminohydrolase-1 activity and nitrite production in RAW264.7 macrophages
Morfill, C., Rossiter, S. and Smith, C.L. 2012. A comparison of novel NG, NG-disubstituted arginines on recombinant dimethylarginine dimethylaminohydrolase-1 activity and nitrite production in RAW264.7 macrophages. Proceedings of the British Pharmacological Society. 10 (4).

Enhanced production of the polyhydroxyalkanoate, P(3HB), from cacillus cereus SPV and its applications in cartilage regeneration
Everest, A., Keshavarz, T. and Roy, I. 2012. Enhanced production of the polyhydroxyalkanoate, P(3HB), from cacillus cereus SPV and its applications in cartilage regeneration. Gordon Research Conference on Biopolymers. Salve Regina University, Newport, Rhode Island, USA 3-8 June 2012

Enhanced bio-decolourisation of acid orange 7 by Shewanella oneidensis through co-metabolism in a microbial fuel cell
Fernando, E., Keshavarz, T. and Kyazze, G. 2012. Enhanced bio-decolourisation of acid orange 7 by Shewanella oneidensis through co-metabolism in a microbial fuel cell. International Biodeterioration and Biodegradation. 72, pp. 1-9.

The homopolymer poly(3-hydroxyoctanoate) as a matrix material for soft tissue engineering
Rai, R., Boccaccini, A.R., Knowles, J.C., Mordon, N., Salih, V., Locke, I.C., Moshrefi-Torbati, M., Keshavarz, T. and Roy, I. 2011. The homopolymer poly(3-hydroxyoctanoate) as a matrix material for soft tissue engineering. Journal of Applied Polymer Science. 122 (6), pp. 3606-3617.

Polyhydroxyalkanoate (PHA): bacterial cellulose composites for biomedical applications
Basnett, P., Smith, C.L., Boccaccini, A.R., Knowles, J.C., Keshavarz, T. and Roy, I. 2011. Polyhydroxyalkanoate (PHA): bacterial cellulose composites for biomedical applications. European Society of Biomaterials. Dublin, Ireland Sept 2011

Controlled delivery of gentamicin using poly(3-hydroxybutyrate) microspheres
Francis, L., Meng, D., Knowles, J.C., Keshavarz, T., Boccaccini, A.R. and Roy, I. 2011. Controlled delivery of gentamicin using poly(3-hydroxybutyrate) microspheres. International Journal of Molecular Sciences. 12 (7), pp. 4294-4314.

Poly-3-hydroxyoctanoate P(3HO), a medium chain length polyhydroxyalkanoate homopolymer from Pseudomonas mendocina
Rai, R., Yunos, D.M., Boccaccini, A.R., Knowles, J.C., Barker, I.A., Howdle, S.M., Tredwell, G.D., Keshavarz, T. and Roy, I. 2011. Poly-3-hydroxyoctanoate P(3HO), a medium chain length polyhydroxyalkanoate homopolymer from Pseudomonas mendocina. Biomacromolecules. 12 (6), pp. 2126-2136.

Enhanced intracellular Ca(2+) concentrations in Escherichia coli and Bacillus subtilis after addition of oligosaccharide elicitors
Murphy, T., Nilsson, A., Roy, I., Harrop, A., Dixon, K. and Keshavarz, T. 2011. Enhanced intracellular Ca(2+) concentrations in Escherichia coli and Bacillus subtilis after addition of oligosaccharide elicitors. Biotechnology Letters. 33 (5), pp. 985-991.

Medium chain length polyhydroxyalkanoates, promising new biomedical materials for the future
Rai, R., Keshavarz, T., Roether, J.A., Boccaccini, A.R. and Roy, I. 2011. Medium chain length polyhydroxyalkanoates, promising new biomedical materials for the future. Materials Science and Engineering R: Reports. 72 (3), pp. 29-47.

Application of fluorescent indicators to analyse intracellular calcium and morphology in filamentous fungi
Nair, R.R., Raina, S., Keshavarz, T. and Kerrigan, M.J.P. 2011. Application of fluorescent indicators to analyse intracellular calcium and morphology in filamentous fungi. Fungal Biology. 115 (4-5), pp. 326-334.

Production of polyhydroxyalkanoates and their medical applications
Roy, I., Akaraonye, E., Francis, L., Rai, R., Basnett, P. and Keshavarz, T. 2011. Production of polyhydroxyalkanoates and their medical applications. 7th International Conference on Polymer and Textile Biotechnology. Milan, Italy 2nd - 4th March 2011

Imaging internal features of whole, unfixed bacteria
Thomson, N., Channon, K., Mokhtar, N.A., Staniewicz, L., Rai, R., Roy, I., Sato, S., Tsuge, T., Donald, A.M., Summers, D. and Sivaniah, E. 2011. Imaging internal features of whole, unfixed bacteria. Scanning. 33 (2), pp. 59-68.

Production of polyhydroxyalkanoates and their biomedical applications
Roy, I., Akaraonye, E., Francis, L., Rai, R., Basnett, P. and Keshavarz, T. 2011. Production of polyhydroxyalkanoates and their biomedical applications. Euro BioMat 2011 - European Symposium on Biomaterials and Related Areas. Jena, Germany

Polyhydroxyalkanoates: the emerging new green polymers of choice
Rai, R. and Roy, I. 2011. Polyhydroxyalkanoates: the emerging new green polymers of choice. in: Sharma, S.K. and Mudhoo, A. (ed.) A handbook of applied biopolymer technology: synthesis, degradation and applications Royal Society of Chemistry.

Using electrophoretic deposition to identify protein charge in biological medium
Meng, D., Francis, L., Roy, I. and Boccaccini, A.R. 2011. Using electrophoretic deposition to identify protein charge in biological medium. Journal of Applied Electrochemistry. 41 (8), pp. 919-923.

Total pituitary hormone content in wild type and MC3 null male and female mice
Dowejko, M.M., Smith, C.L., Getting, S.J., Perretti, M., Le Tissier, P. and Murray, J.F. 2011. Total pituitary hormone content in wild type and MC3 null male and female mice. British Society for Neuroendocrinology. Cambridge 3rd - 5th July 2011

Comparison between the total pituitary hormone content in wild type and melanocortin 3 receptor (MC3) null male and female mice
Dowejko, M.M., Smith, C.L., Getting, S.J., Perretti, M., Le Tissier, P. and Murray, J.F. 2011. Comparison between the total pituitary hormone content in wild type and melanocortin 3 receptor (MC3) null male and female mice. Society for Reproduction and Fertility. Brighton 11th - 13th July 2011

Impact of linoleic acid supplementation on lovastatin production in Aspergillus terreus cultures
Sorrentino, F., Roy, I. and Keshavarz, T. 2010. Impact of linoleic acid supplementation on lovastatin production in Aspergillus terreus cultures. Applied Microbiology and Biotechnology. 88 (1), pp. 65-73.

Production of SCL and MCL polyhydroxyalkanoates and their applications
Roy, I., Akaraonye, E., Francis, L., Rai, R. and Boccaccini, A.R. 2010. Production of SCL and MCL polyhydroxyalkanoates and their applications. 12th International Symposium on Biodegradable Polyesters. Stuttgart, Germany.

Multifunctional P(3HB) microsphere/45S Bioglass ®-based composite scaffolds for bone tissue engineering
Francis, L., Meng, D., Boccaccini, A.R. and Roy, I. 2010. Multifunctional P(3HB) microsphere/45S Bioglass ®-based composite scaffolds for bone tissue engineering. 12th International Symposium on Biodegradable Polyesters. Stuttgart, Germany.

In vitro mutagenesis of the type IV polyhydroxyalkanoate synthase from bacillus cereus SPV
Basnett, P., Philip, S.E., Markhiv, A., Vydayanathan, A. and Roy, I. 2010. In vitro mutagenesis of the type IV polyhydroxyalkanoate synthase from bacillus cereus SPV. 12th International Symposium on Biodegradable Polyesters. Stuttgart, Germany.

Enhanced and economical production of poly(3-hydroxybutyrate), a biodegradable polymer and its applications
Akaraonye, E., Safarikova, M., Keshavarz, T. and Roy, I. 2010. Enhanced and economical production of poly(3-hydroxybutyrate), a biodegradable polymer and its applications. 12th International Symposium on Biodegradable Polyesters. Stuttgart, Germany.

Quorum sensing as a method for improving sclerotiorin production in Penicillium sclerotiorum
Raina, S., Odell, M. and Keshavarz, T. 2010. Quorum sensing as a method for improving sclerotiorin production in Penicillium sclerotiorum. Journal of Biotechnology. 148 (2-3), pp. 91-98.

Multi-functional P(3HB) microsphere/45S5 Bioglass((R))-based composite scaffolds for bone tissue engineering
Francis, L., Meng, D., Knowles, J.C., Roy, I. and Boccaccini, A.R. 2010. Multi-functional P(3HB) microsphere/45S5 Bioglass((R))-based composite scaffolds for bone tissue engineering. Acta Biomaterialia. 6 (7), pp. 2773-2786.

The influence of tetracycline loading on the surface morphology and biocompatibility of films made from P(3HB) microspheres
Francis, L., Meng, D., Locke, I.C., Mordon, N., Salih, V., Knowles, J.C., Boccaccini, A.R. and Roy, I. 2010. The influence of tetracycline loading on the surface morphology and biocompatibility of films made from P(3HB) microspheres. Advanced Engineering Materials. 12 (7), pp. B260-B268.

In vitro production of polyhydroxyalkanoates: achievements and applications
Thomson, N., Roy, I., Summers, D. and Sivaniah, E. 2010. In vitro production of polyhydroxyalkanoates: achievements and applications. Journal of Chemical Technology and Biotechnology. 85 (6), pp. 760-767.

Fabrication of a novel poly(3-hydroxyoctanoate) / nanoscale bioactive glass composite film with potential as a multifunctional wound dressing
Rai, R., Boccaccini, A.R., Knowles, J.C., Locke, I.C., Gordge, M.P., McCormick, A., Salih, V., Mordon, N., Keshavarz, T. and Roy, I. 2010. Fabrication of a novel poly(3-hydroxyoctanoate) / nanoscale bioactive glass composite film with potential as a multifunctional wound dressing. 5th international conference on times of polymers (TOP) and composites. Ischia, Italy 20–23 June 2010

Polyhydroxyalkanoates: bioplastics with a green agenda
Keshavarz, T. and Roy, I. 2010. Polyhydroxyalkanoates: bioplastics with a green agenda. Current Opinion in Microbiology. 13 (3), pp. 321-326.

Production of polyhydroxyalkanoates: the future green materials of choice
Akaraonye, E., Keshavarz, T. and Roy, I. 2010. Production of polyhydroxyalkanoates: the future green materials of choice. Journal of Chemical Technology and Biotechnology. 85 (6), pp. 732-743.

Poly(3-hydroxybutyrate) multifunctional composite scaffolds for tissue engineering applications
Misra, S.K., Ansari, T.I., Valappil, S.P., Mohn, D., Philip, S.E., Stark, W.J., Roy, I., Knowles, J.C., Salih, V. and Boccaccini, A.R. 2010. Poly(3-hydroxybutyrate) multifunctional composite scaffolds for tissue engineering applications. Biomaterials. 31 (10), pp. 2806-2815.

Characterization of carbon nanotube (MWCNT) containing P(3HB)/bioactive glass composites for tissue engineering applications
Misra, S.K., Ohashi, F., Valappil, S.P., Knowles, J.C., Roy, I., Ravi, S., Silva, P., Salih, V. and Boccaccini, A.R. 2010. Characterization of carbon nanotube (MWCNT) containing P(3HB)/bioactive glass composites for tissue engineering applications. Acta Biomaterialia. 6 (3), pp. 735-742.

Effect of nanoparticulate bioactive glass particles on bioactivity and cytocompatibility of poly(3-hydroxybutyrate) composites
Misra, S.K., Ansari, T.I., Mohn, D., Valappil, S.P., Brunner, T.J., Stark, W.J., Roy, I., Knowles, J.C., Sibbons, P.D., Valsami-Jones, E., Boccaccini, A.R. and Salih, V. 2010. Effect of nanoparticulate bioactive glass particles on bioactivity and cytocompatibility of poly(3-hydroxybutyrate) composites. Journal of the Royal Society Interface. 7 (44), pp. 453-465.

Activation of testicular melanocortin 3 receptors (MC3-R) inhibits LH-stimulated testosterone production
Akindele, K., Horanin, M.M., Getting, S.J., Smith, C.L. and Murray, J.F. 2010. Activation of testicular melanocortin 3 receptors (MC3-R) inhibits LH-stimulated testosterone production. Society for Endocrinology BES 2010. Manchester 15th - 18th March 2010

Polyhydroxyalkanoates, the emerging new green polymers of choice
Rai, R. and Roy, I. 2010. Polyhydroxyalkanoates, the emerging new green polymers of choice. in: Biodegradable polymers and green chemistry Royal Society of Chemistry. pp. 79-97

Microbial production of biodegradable polymers and their role in cardiac stent development
Basnett, P. and Roy, I. 2010. Microbial production of biodegradable polymers and their role in cardiac stent development. in: Mendez-Vilas, A. (ed.) Current research, technology and education topics in applied microbiology and microbial biotechnology Formatex Research Center.

Biodegradable polymers and their role in coronary stent development
Basnett, P. and Roy, I. 2010. Biodegradable polymers and their role in coronary stent development. in: Current research in technology and education topics in applied microbiology and microbial biotechnology Formatex Research Center.

Testicular LH-stimulated testosterone production is inhibited by activation of melanocortin 3 receptors (MC3)
Akindele, K., Horanin, M.M., Getting, S.J., Smith, C.L. and Murray, J.F. 2010. Testicular LH-stimulated testosterone production is inhibited by activation of melanocortin 3 receptors (MC3). Society for Reproduction and Fertility. Sutton Bonnington 11th - 13th July 2010

Electrospun nanofibrous biodegradable polyester coatings on Bioglass®-based glass-ceramics for tissue engineering
Bretcanu, O., Misra, S.K., Yunos, D.M., Boccaccini, A.R., Roy, I., Kowalczyk, T., Blonski, S. and Kowalewski, T.A. 2009. Electrospun nanofibrous biodegradable polyester coatings on Bioglass®-based glass-ceramics for tissue engineering. Materials Chemistry and Physics. 118 (2-3), pp. 420-426.

Microbial quorum sensing: a tool or a target for antimicrobial therapy?
Raina, S., De Vizio, D., Odell, M., Clements, M.O., Vanhulle, S. and Keshavarz, T. 2009. Microbial quorum sensing: a tool or a target for antimicrobial therapy? Biotechnology and Applied Biochemistry. 54 (2), pp. 65-84.

Quantitative PCR study on the mode of action of oligosaccharide elicitors on penicillin G production by Penicillium chrysogenum
Nair, R.R., Roy, I., Bucke, C. and Keshavarz, T. 2009. Quantitative PCR study on the mode of action of oligosaccharide elicitors on penicillin G production by Penicillium chrysogenum. Journal of Applied Microbiology. 107 (4), pp. 1131-1139.

Effect of impeller speed and pH on the production of Poly(3-hydroxybutyrate) using Bacillus cereus SPV
Philip, S.E., Sengupta, S., Keshavarz, T. and Roy, I. 2009. Effect of impeller speed and pH on the production of Poly(3-hydroxybutyrate) using Bacillus cereus SPV. Biomacromolecules. 10 (4), pp. 691-699.

Incorporation of vitamin E in poly(3hydroxybutyrate)/Bioglass composite films: effect on surface properties and cell attachment
Misra, S.K., Philip, S.E., Chrzanowski, W., Nazhat, S.N., Roy, I., Knowles, J.C., Salih, V. and Boccaccini, A.R. 2009. Incorporation of vitamin E in poly(3hydroxybutyrate)/Bioglass composite films: effect on surface properties and cell attachment. Journal of the Royal Society Interface. 6 (33), pp. 401-409.

In vitro biocompatibility of 45S5 Bioglass®-derived glass-ceramic scaffolds coated with poly(3-hydroxybutyrate)
Bretcanu, O., Misra, S.K., Roy, I., Renghini, C., Fiori, F., Boccaccini, A.R. and Salih, V. 2009. In vitro biocompatibility of 45S5 Bioglass®-derived glass-ceramic scaffolds coated with poly(3-hydroxybutyrate). Journal of Tissue Engineering and Regenerative Medicine. 3 (2), pp. 139-148.

Utilising mitochondrial DNA markers to identify insects for forensic applications: an investigation into how the preservation and storage of insect tissue can affect mtDNA yield
Thompson, A., Tinworth, L. and Smith, C.L. 2009. Utilising mitochondrial DNA markers to identify insects for forensic applications: an investigation into how the preservation and storage of insect tissue can affect mtDNA yield. in: Proceedings of the 5th National FORREST Conference 2009 (FORensic RESearch and Teaching), 30th June – 1st July 2009, Liverpool John Moores University Forensic Institute Research Network and The Higher Education Academy Physical Sciences Centre. pp. 45

Polyhydroxyalkanoate synthases-enzymes involved in biodegradable polymer synthesis
Roy, I., Philip, S.E. and Keshavarz, T. 2009. Polyhydroxyalkanoate synthases-enzymes involved in biodegradable polymer synthesis. COST Action 868: Biotechnical Functionalisation of Renewable Polymeric Materials : Meeting on "Biotechnology and Biopolymers in Textile, Packaging, Cosmetics and Medical Applications". Istanbul, Turkey 19 - 20 Feb 2009

Microbial PHA biosynthesis and its biomedical applications
Roy, I., Philip, S.E., Francis, L., Rai, R., Keshavarz, T., Misra, S.K., Decheng, M. and Boccaccini, A.R. 2009. Microbial PHA biosynthesis and its biomedical applications. in: Proceedings of Euromat 2009, Glasgow, 7 - 10 September 2009 Euromat.

A class IV PHA synthase from Bacillus cereus SPV
Philip, S.E. and Roy, I. 2009. A class IV PHA synthase from Bacillus cereus SPV. in: Kiekens, P., Nierstrasz, V. and Lenting, H.B.M. (ed.) Proceedings of the international conference on textile and polymer biotechnology 6th Het Pand, Ghent, Belgium 23-25 September 2009 Ghent University. Department of Textiles Ghent.

Molecular characterization of the melanocortin 3 receptor in the testes of mice
Horanin, M.M., Akindele, K., Getting, S.J., Smith, C.L. and Murray, J.F. 2009. Molecular characterization of the melanocortin 3 receptor in the testes of mice. pA2 Online. From the Queen Elizabeth II Conference Centre London, Winter 2009 Meeting: Proceedings of the British Pharmacological Society. 7 (4).

P(3HB) production by Bacillus cereus SPV using sucrose as a carbon source
Akaraonye, E., Keshavarz, T. and Roy, I. 2009. P(3HB) production by Bacillus cereus SPV using sucrose as a carbon source. in: Kiekens, P., Nierstrasz, V. and Lenting, H.B.M. (ed.) Proceedings of the international conference on textile and polymer biotechnology 6th Het Pand, Ghent, Belgium 23-25 September 2009 Ghent University. Department of Textiles Ghent.

Elicitation effects of oligosaccharides on the transcriptional level of bacitracin ABC transporter genes in Bacillus licheniformis
Murphy, T., Roy, I., Harrop, A., Dixon, K. and Keshavarz, T. 2008. Elicitation effects of oligosaccharides on the transcriptional level of bacitracin ABC transporter genes in Bacillus licheniformis. Biotechnology Letters. 30 (9), pp. 1665-1670.

Dye decolorisation by laccase entrapped in copper alginate
Teerapatsakul, C., Bucke, C., Parra, R., Keshavarz, T. and Chitradon, L. 2008. Dye decolorisation by laccase entrapped in copper alginate. World Journal of Microbiology and Biotechnology. 24 (8), pp. 1367-1374.

Polyhydroxyalkanoate biosynthesis in Bacillus cereus SPV under varied limiting conditions and an insight into the biosynthetic genes involved
Valappil, S.P., Rai, R., Bucke, C. and Roy, I. 2008. Polyhydroxyalkanoate biosynthesis in Bacillus cereus SPV under varied limiting conditions and an insight into the biosynthetic genes involved. Journal of Applied Microbiology. 104 (6), pp. 1624-1635.

Towards higher laccase activities produced by aquatic ascomycetous fungi through combination of elicitors and an alternative substrate
Junghanns, C., Parra, R., Keshavarz, T. and Schlosser, D. 2008. Towards higher laccase activities produced by aquatic ascomycetous fungi through combination of elicitors and an alternative substrate. Engineering in Life Sciences. 8 (3), pp. 277-285.

Comparison of nanoscale and microscale bioactive glass on the properties of P(3HB)/Bioglass® composites
Misra, S.K., Mohn, D., Brunner, T.J., Stark, W.J., Philip, S.E., Roy, I., Salih, V., Knowles, J.C. and Boccaccini, A.R. 2008. Comparison of nanoscale and microscale bioactive glass on the properties of P(3HB)/Bioglass® composites. Biomaterials. 29 (12), pp. 1750-1761.

Comparison of nanoscale and microscale bioactive glass on the properties of P(3HB)/Bioglass composites
Misra, S.K., Mohn, D., Brunner, T.J., Stark, W.J., Philip, S.E., Roy, I., Salih, V., Knowles, J.C. and Boccaccini, A.R. 2008. Comparison of nanoscale and microscale bioactive glass on the properties of P(3HB)/Bioglass composites. Biomaterials. 29 (12), pp. 1750-1761.

Ratio of 5,6,7,8-tetrahydrobiopterin to 7,8-dihydrobiopterin in endothelial cells determines glucose-elicited changes in NO vs. Superoxide production by eNOS
Crabtree, M.J., Smith, C.L., Lam, G., Goligorsky, M.S. and Gross, S.S. 2008. Ratio of 5,6,7,8-tetrahydrobiopterin to 7,8-dihydrobiopterin in endothelial cells determines glucose-elicited changes in NO vs. Superoxide production by eNOS. American Journal of Physiology: Heart and Circulatory Physiology. 294 (4), pp. H1530-H1540.

Metabolite profiles of interacting mycelial fronts differ for pairings of the wood decay basidiomycete fungus, Stereum hirsutum with its competitors Coprinus micaceus and Coprinus disseminatus
Peiris, D., Dunn, W.B., Brown, M., Kell, D.B., Roy, I. and Hedger, J.N. 2008. Metabolite profiles of interacting mycelial fronts differ for pairings of the wood decay basidiomycete fungus, Stereum hirsutum with its competitors Coprinus micaceus and Coprinus disseminatus. Metabolomics. 4 (1), pp. 52-62.

Optimisation of β-glucuronidase production from a newly isolated Ganoderma applanatum
Chouiter, R., Roy, I. and Bucke, C. 2008. Optimisation of β-glucuronidase production from a newly isolated Ganoderma applanatum. Journal of Molecular Catalysis B: Enzymatic. 50 (2-4), pp. 114-120.

Melanocortin 3 receptor in the testes of mice
Yogarajah, S., Lynch, S., Smith, C.L., Getting, S.J., Perretti, M. and Murray, J.F. 2008. Melanocortin 3 receptor in the testes of mice. Society for Reproduction and Fertility. Edinburgh 29 Jun - 01 Jul 2008 pp. Abstract P80

Melanocortin 3 receptor in the testes of mice
Wotherspoon, G., Yogarajah, S., Lynch, S., Smith, C.L., Getting, S.J., Perretti, M. and Murray, J.F. 2008. Melanocortin 3 receptor in the testes of mice. pA2 Online. From the University of Brighton, Winter 2008 Meeting: Proceedings of the British Pharmacological Society. 6 (4), p. P008.

Asymmetric dimethylarginine negatively influences osteoblast differentiation in vitro
Stenbeck, G., Joseph, J., Getting, S.J. and Smith, C.L. 2008. Asymmetric dimethylarginine negatively influences osteoblast differentiation in vitro. pA2 Online. From the University of Brighton, Winter 2008 Meeting: Proceedings of the British Pharmacological Society. 6 (4), p. C041.

Microbial biosynthesis of PHAs and its applications
Roy, I., Philip, S.E., Francis, L., Rai, R., Valappil, S.P., Markiv, A., Keshavarz, T., Misra, S.K., Decheng, M. and Boccaccini, A.R. 2008. Microbial biosynthesis of PHAs and its applications. COST Action 868: Biotechnical Functionalisation of Renewable Polymeric Materials: 2008 Annual Workshop (combined Working Group and Management Committee meeting). Varna, Bulgaria 18 -19 Sep 2008

Microbial PHA biosynthesis and its applications
Roy, I., Philip, S.E., Francis, L., Rai, R., Valappil, S.P., Markiv, A., Keshavarz, T., Misra, S.K., Decheng, M. and Boccaccini, A.R. 2008. Microbial PHA biosynthesis and its applications. 11th International Symposium on Biodegradable Polyesters. Massey University in Auckland, New Zealand 23 - 26 Nov 2008

Polyhydroxyalkanoates: a new generation of biotechnologically produced biodegradable polymers
Roy, I. and Philip, S.E. 2008. Polyhydroxyalkanoates: a new generation of biotechnologically produced biodegradable polymers. in: Richter, F.W. (ed.) Biotechnology: research, technology and applications New York Nova Science Publishers. pp. 1-48

Fabrication of a novel
Roy, I. and Philip, S.E. 2008. Fabrication of a novel. in: Richter, F.W. (ed.) Biotechnology: research, technology and applications New York Nova Science Publishers. pp. 1-48

Production of medium chain length polyhydroxyalkanoates using Pseudomonas species
Rai, R., Keshavarz, T. and Roy, I. 2008. Production of medium chain length polyhydroxyalkanoates using Pseudomonas species. 11th International Symposium on Biodegradable Polyesters. Massey University in Auckland, New Zealand 23 - 26 Nov 2008

Polyhydroxyalkanoate synthase in Bacillus cereus SPV, a class IV PHA synthase
Philip, S.E., Odell, M., Keshavarz, T. and Roy, I. 2008. Polyhydroxyalkanoate synthase in Bacillus cereus SPV, a class IV PHA synthase. 11th International Symposium on Biodegradable Polyesters. Massey University in Auckland, New Zealand 23 - 26 Nov 2008

Optimisation studies of multiple elicitor addition in microbial systems: P.Chrysogenum and B.Lichiniformis
Nair, R.R., Murphy, T., Roy, I., Harrop, A., Dixon, K. and Keshavarz, T. 2008. Optimisation studies of multiple elicitor addition in microbial systems: P.Chrysogenum and B.Lichiniformis. in: Marino, G., Bardone, E. and Viglia, A. (ed.) IBIC2008 - 1st International Conference on Industrial Biotechnology AIDIC Servizi S.r.l..

Polyhydroxyalkanoate synthasis using Bacillus cereus SPV
Francis, L., Keshavarz, T. and Roy, I. 2008. Polyhydroxyalkanoate synthasis using Bacillus cereus SPV. COST Action 868: Biotechnical Functionalisation of Renewable Polymeric Materials: 2008 Annual Workshop (combined Working Group and Management Committee meeting). Varna, Bulgaria 18 -19 Sep 2008

Large-scale production and efficient recovery of PHB with desirable material properties, from the newly characterised Bacillus cereus SPV
Valappil, S.P., Misra, S.K., Boccaccini, A.R., Keshavarz, T., Bucke, C. and Roy, I. 2007. Large-scale production and efficient recovery of PHB with desirable material properties, from the newly characterised Bacillus cereus SPV. Journal of Biotechnology. 132 (3), pp. 251-258.

Biodegradable polymer coated 45S5 Bioglassderived glass-ceramic scaffolds for bone tissue engineering
Bretcanu, O., Chen, Q., Misra, S.K., Boccaccini, A.R., Roy, I., Verne, E. and Brovarone, C.V. 2007. Biodegradable polymer coated 45S5 Bioglassderived glass-ceramic scaffolds for bone tissue engineering. European Journal of Glass Science and Technology Part A. 48 (5), pp. 227-234.

Effect of oligosaccharide elicitors on bacitracin A production and evidence of transcriptional level control
Keshavarz, T., Murphy, T., Roy, I., Harrop, A. and Dixon, K. 2007. Effect of oligosaccharide elicitors on bacitracin A production and evidence of transcriptional level control. Journal of Biotechnology. 131 (4), pp. 397-403.

Fabrication and characterization of biodegradable poly(3-hydroxybutyrate) composite containing Bioglass
Misra, S.K., Nazhat, S.N., Valappil, S.P., Moshrefi-Torbati, M., Wood, R.J.K., Roy, I. and Boccaccini, A.R. 2007. Fabrication and characterization of biodegradable poly(3-hydroxybutyrate) composite containing Bioglass. Biomacromolecules. 8 (7), pp. 2112-2119.

Effect of mannan oligosaccharide elicitor and ferulic acid on enhancement of laccases production in liquid cultures of basidiomycetes
Vanhulle, S., Radman, R., Parra, R., Cui, T., Bols, C.M., Tron, T., Sannia, G. and Keshavarz, T. 2007. Effect of mannan oligosaccharide elicitor and ferulic acid on enhancement of laccases production in liquid cultures of basidiomycetes. Enzyme and Microbial Technology. 40 (7), pp. 1712-1718.

Novel application of oligosaccharides as elicitors for the enhancement of bacitracin A production in cultures of Bacillus licheniformis
Murphy, T., Parra, R., Radman, R., Roy, I., Harrop, A., Dixon, K. and Keshavarz, T. 2007. Novel application of oligosaccharides as elicitors for the enhancement of bacitracin A production in cultures of Bacillus licheniformis. Enzyme and Microbial Technology. 40 (6), pp. 1518-1523.

Polyhydroxyalkanoates: biodegradable polymers with a range of applications
Philip, S.E., Keshavarz, T. and Roy, I. 2007. Polyhydroxyalkanoates: biodegradable polymers with a range of applications. Journal of Chemical Technology and Biotechnology. 82 (3), pp. 233-247.

Polyhydroxyalkanoates: biodegradable polymers with a range of applications
Philip, S.E., Keshavarz, T. and Roy, I. 2007. Polyhydroxyalkanoates: biodegradable polymers with a range of applications. Journal of Chemical Technology and Biotechnology. 82 (3), pp. 233-247.

Poly(3- hydroxybutyrate)/Bioglass® composite films containing carbon nanotubes
Misra, S.K., Watts, P.C.P., Valappil, S.P., Silva, S.R.P., Boccaccini, A.R. and Roy, I. 2007. Poly(3- hydroxybutyrate)/Bioglass® composite films containing carbon nanotubes. Nanotechnology. 18 (7), p. 075701.

Disruption of methylarginine metabolism impairs vascular homeostasis
Leiper, J.M., Nandi, M., Torondel, B., Murray-Rust, J., Malaki, M., O'Hara, B., Rossiter, S., Anthony, S., Madhani, M., Selwood, D.L., Smith, C.L., Wojciak-Stothard, B., Rudiger, A., Stidwill, R., McDonald, N.Q. and Vallance, P. 2007. Disruption of methylarginine metabolism impairs vascular homeostasis. Nature Medicine. 13 (2), pp. 198-203.

C-reactive protein and asymmetric dimethylarginine: markers or mediators in cardiovascular disorders?
Smith, C.L. 2007. C-reactive protein and asymmetric dimethylarginine: markers or mediators in cardiovascular disorders? Current Pharmaceutical Design. 13 (16), pp. 1619-1629.

PHA biosynthesis in Bacillus cereus SPV and its applications
Roy, I., Valappil, S.P., Misra, S.K. and Boccaccini, A.R. 2007. PHA biosynthesis in Bacillus cereus SPV and its applications. COST Action 868: Biotechnical Functionalisation of Renewable Polymeric Materials: first annual workshop. Graz, Austria 12 - 14 Sep 2007

PHA Biosynthesis in Bacillus cereus SPV
Roy, I., Philip, S.E., Rai, R. and Valappil, S.P. 2007. PHA Biosynthesis in Bacillus cereus SPV. International Conference on Biodegradable Polymers: their production, characterisation and application. SCI, London 10 Dec 2007

Production of Polyhydroxyalkanoates from Bacillus cereus SPV under different nutrient limiting conditions
Rai, R., Padinhara, S.V., Keshavarz, T. and Roy, I. 2007. Production of Polyhydroxyalkanoates from Bacillus cereus SPV under different nutrient limiting conditions. COST Action 868: Biotechnical Functionalisation of Renewable Polymeric Materials: first annual workshop. Graz, Austria 12 - 14 Sep 2007

Production of medium chain length polyhydroxyalkanoates using pseudomonas species UOW0417398
Rai, R., Keshavarz, T. and Roy, I. 2007. Production of medium chain length polyhydroxyalkanoates using pseudomonas species UOW0417398. International Conference on Biodegradable Polymers: their production, characterisation and application. SCI, London 10 Dec 2007

Polyhydroxy-alkanoates - the biodegradable polymers
Philip, S.E., Odell, M., Keshavarz, T. and Roy, I. 2007. Polyhydroxy-alkanoates - the biodegradable polymers. International Conference on Biodegradable Polymers: their production, characterisation and application. SCI, London 10 Dec 2007

Biosynthesis of polyhydroxyalkanoates and their applications
Francis, L., Keshavarz, T. and Roy, I. 2007. Biosynthesis of polyhydroxyalkanoates and their applications. International Conference on Biodegradable Polymers: their production, characterisation and application. SCI, London 10 Dec 2007

Polyhydroxyalkanoate (PHA) biosynthesis from structurally unrelated carbon sources by a newly characterized Bacillus spp
Valappil, S.P., Peiris, D., Langley, G.J., Herniman, J.M., Boccaccini, A.R., Bucke, C. and Roy, I. 2007. Polyhydroxyalkanoate (PHA) biosynthesis from structurally unrelated carbon sources by a newly characterized Bacillus spp. Journal of Biotechnology. 127 (3), pp. 475-487.

Polyhydroxyalkanoates in Gram-positive bacteria: insights from the genera Bacillus and Streptomyces
Valappil, S.P., Boccaccini, A.R., Bucke, C. and Roy, I. 2007. Polyhydroxyalkanoates in Gram-positive bacteria: insights from the genera Bacillus and Streptomyces. Antonie van Leeuwenhoek. 91 (1), pp. 1-17.

Biomedical applications of polyhydroxyalkanoates: an overview of animal testing and in vivo responses
Valappil, S.P., Misra, S.K., Boccaccini, A.R. and Roy, I. 2006. Biomedical applications of polyhydroxyalkanoates: an overview of animal testing and in vivo responses. Expert Review of Medical Devices. 3 (6), pp. 853-868.

Effects of oligosaccharides and polysaccharides on the generation of reactive oxygen species in different biological systems
Radman, R., Bland, E.J., Sangworachat, N., Bucke, C. and Keshavarz, T. 2006. Effects of oligosaccharides and polysaccharides on the generation of reactive oxygen species in different biological systems. Biotechnology and Applied Biochemistry. 44 (3), pp. 129-133.

Cell immobilization: past, present and future prospects
Keshavarz, T. and Nedovic, V. 2006. Cell immobilization: past, present and future prospects. Journal of Chemical Technology and Biotechnology. 81 (4), pp. 483-484.

Specificities of proteases for use in leather manufacture
Foroughi, F., Keshavarz, T. and Evans, C.S. 2006. Specificities of proteases for use in leather manufacture. Journal of Chemical Technology and Biotechnology. 81 (3), pp. 257-261.

Nanoindentation testing of biodegradabale polymers
Wood, R.J.K., Dan, S., Moshrefi-Torbati, M., Misra, S.K., Valappil, S.P., Boccaccini, A.R. and Roy, I. 2006. Nanoindentation testing of biodegradabale polymers. Proceedings of CAMTEC Workshop. University of Cambridge, Cambridge, UK 11 Apr 2006

PHA biosynthesis in Bacillus cereus SPV and its applications
Roy, I., Valappil, S.P., Misra, S.K. and Boccaccini, A.R. 2006. PHA biosynthesis in Bacillus cereus SPV and its applications. Proceedings of the International Symposium on Biological Polyesters. Minneapolis, USA 27 - 31 Aug 2006

Polyhydroxyalkanoate (PHA)/inorganic phase composites for tissue engineering applications
Misra, S.K., Valappil, S.P., Roy, I. and Boccaccini, A.R. 2006. Polyhydroxyalkanoate (PHA)/inorganic phase composites for tissue engineering applications. Biomacromolecules. 7 (8), pp. 2250-2257.

Development of polyhydroxyalkanoates/Bioglass® composite tissue scaffolds for tissue engineering applications
Misra, S.K., Valappil, S.P., Nazhat, S.N., Moshrefi-Torbati, M., Roy, I. and Boccaccini, A.R. 2006. Development of polyhydroxyalkanoates/Bioglass® composite tissue scaffolds for tissue engineering applications. Proceedings of the 20th European Conference on Biomaterials, European Society of Biomaterials. Nantes, FRANCE 27 Sep - 01 Oct 2006

From bacteria to tissue engineering applications-usage of polyhydroxyalkanoates for biomedical applications
Misra, S.K., Nazhat, S.N., Torbati, M.M., Silva, S.R.P., Roy, I. and Boccaccini, A.R. 2006. From bacteria to tissue engineering applications-usage of polyhydroxyalkanoates for biomedical applications. Proceedings of the International Conference on the Design of Biomaterials. Kanpur, India 08 - 11 Dec 2006

Comparative studies on the influence of higher basidiomycetes polysaccharide fractions on reactive oxidizing species production
Lakkireddy, G., Keshavarz, T. and Bucke, C. 2006. Comparative studies on the influence of higher basidiomycetes polysaccharide fractions on reactive oxidizing species production. International Journal of Medicinal Mushrooms. 8 (2), pp. 135-148.

Biological activity of industrial wood and bark waste from Pinus nigra
Curras Lino, M., Radman, R., Bertaud, F., Nisula, L., Lenon, G., Holbom, B., Locke, I.C., Thompson, S. and Keshavarz, T. 2006. Biological activity of industrial wood and bark waste from Pinus nigra. in: Actual problems of creation of new medicinal preparations of natural origin: the 10th international congress PHYTOPHARM 2006, St.-Petersburg, June 27-30, 2006: proceedings of congress St Petersburg, Russia PHYTOPHARM. pp. 401-403

Effects of ADMA upon gene expression: an insight into the pathophysiological significance of raised plasma ADMA
Smith, C.L., Anthony, S., Hubank, M., Leiper, J.M. and Vallance, P. 2005. Effects of ADMA upon gene expression: an insight into the pathophysiological significance of raised plasma ADMA. PLoS Medicine. 2 (10), pp. 1031-1043.

Cardiovascular tests: use & limits of biochemical markers - therapeutic measurements of ADMA involved in cardiovascular disorders
Smith, C.L. and Vallance, P. 2005. Cardiovascular tests: use & limits of biochemical markers - therapeutic measurements of ADMA involved in cardiovascular disorders. Current Pharmaceutical Design. 11 (17), pp. 2177-2185.

Selective substrate-based inhibitors of mammalian dimethylarginine dimethylaminohydrolase
Rossiter, S., Smith, C.L., Malaki, M., Nandi, M., Gill, H., Leiper, J.M., Vallance, P. and Selwood, D.L. 2005. Selective substrate-based inhibitors of mammalian dimethylarginine dimethylaminohydrolase. Journal of Medicinal Chemistry. 48 (14), pp. 1670-1678.

Polyhydroxyalkanoate synthases: the enzymes involved in biodegradable polymer synthesis
Valappil, S.P., Philip, S.E., Odell, M., Keshavarz, T. and Roy, I. 2005. Polyhydroxyalkanoate synthases: the enzymes involved in biodegradable polymer synthesis. Proceedings of Frontiers in Chemical Biology: Mechanistic Enzymology and Biocatalysis. Exeter, UK 31 Aug - 02 Sep 2005

Effect of recovery process on the physical and mechanical properties of Polyhydroxybutyrate (PHB) extracted from a newly isolated Bacillus sp.
Valappil, S.P., Misra, S.K., Boccaccini, A.R. and Bucke, C. 2005. Effect of recovery process on the physical and mechanical properties of Polyhydroxybutyrate (PHB) extracted from a newly isolated Bacillus sp. Proceedings of the UKSB annual meeting, Nottingham, UK. Nottingham, UK 2005

Large scale production of P(3HB) from newly isolated Bacillus sp.
Valappil, S.P., Keshavarz, T., Bucke, C. and Roy, I. 2005. Large scale production of P(3HB) from newly isolated Bacillus sp. Proceedings of the 1st International Conference on Environmental Industrial and Applied Microbiology. Badajoz, Spain 15 - 18 Mar 2005

Effect of various carbon sources on the production of PHAs from the newly isolated Bacillus sp.
Valappil, S.P., Bucke, C. and Roy, I. 2005. Effect of various carbon sources on the production of PHAs from the newly isolated Bacillus sp. Proceedings of the International Union of Microbiological Societies Congress, IUMS. San Fransisco, USA 23 - 28 Jul 2005

Pathophysiological concentrations of ADMA alter human coronary artery endothelial cell gene expression: an insight into the pathophysiological significance of raised plasma ADMA levels
Smith, C.L., Anthony, S., Malaki, M., Hubank, M., Leiper, J.M. and Vallance, P. 2005. Pathophysiological concentrations of ADMA alter human coronary artery endothelial cell gene expression: an insight into the pathophysiological significance of raised plasma ADMA levels. in: Boger, R., Fleming, I. and Waltenberger, J. (ed.) Vascular Biology and Medicine: 3rd European Meeting, Hamburg, September 2005, abstracts Germany Karger.

Potential therapeutic benefit of novel DDAH inhibitors for the treatment of endotoxemia
Nandi, M., Rossiter, S., Torondel, B., Malaki, M., Smith, C.L., Stidwill, R., Leiper, J.M. and Vallance, P. 2005. Potential therapeutic benefit of novel DDAH inhibitors for the treatment of endotoxemia. in: Boger, R., Fleming, I. and Waltenberger, J. (ed.) Vascular Biology and Medicine: 3rd European Meeting, Hamburg, September 2005, abstracts Germany Karger.

Towards unravelling the elicitation mechanism in cultures of Penicillium chrysogenin: Chrysogenin elicitation
Nair, R.R., Radman, R., Roy, I., Bucke, C. and Keshavarz, T. 2005. Towards unravelling the elicitation mechanism in cultures of Penicillium chrysogenin: Chrysogenin elicitation. in: Pierucci, S. (ed.) 7th Italian Conference on Chemical and Process Engineering: ICheaP 7, May 15-16, 2005, Giardini Di Naxos, Italy Italy Associazione Italiana Di Ingegneria Chimica.

Natural biodegradable polymers from the Polyhydroxyalkanoate family emerging as a promising material for biomedical applications
Misra, S.K., Boccaccini, A.R., Valappil, S.P. and Roy, I. 2005. Natural biodegradable polymers from the Polyhydroxyalkanoate family emerging as a promising material for biomedical applications. Proceedings of 'a Forecast of the Future for Biomaterials' Professor Larry L. Hench Retirement Symposium. London, UK 29 - 30 Sep 2005

Evidence of systemic and pulmonary endothelial dysfunction in the Dimethylarginine Dimethylaminohydrolase I (DDAH I+/-) heterozygous knockout mouse
Malaki, M., Nandi, M., Madhani, M., Gill, H., Smith, C.L., Leiper, J.M. and Vallance, P. 2005. Evidence of systemic and pulmonary endothelial dysfunction in the Dimethylarginine Dimethylaminohydrolase I (DDAH I+/-) heterozygous knockout mouse. in: Boger, R., Fleming, I. and Waltenberger, J. (ed.) Vascular Biology and Medicine: 3rd European Meeting, Hamburg, September 2005, abstracts Germany Karger.

Dimethylarginine dimethylaminohydrolase I (DDAH I) heterozygous knockout mice display a cardiovascular phenotype consisting of pulmonary and systemic endothelial dysfunction
Malaki, M., Nandi, M., Madhani, M., Gill, H., Smith, C.L., Leiper, J.M. and Vallance, P. 2005. Dimethylarginine dimethylaminohydrolase I (DDAH I) heterozygous knockout mice display a cardiovascular phenotype consisting of pulmonary and systemic endothelial dysfunction. British Pharmaceutical Society Summer Meeting. Cambridge, UK 06-08 Jul 2005

Production of biopharmaceuticals through microbial cell immobilization
Keshavarz, T. 2005. Production of biopharmaceuticals through microbial cell immobilization. in: Nedovic, V. and Willaert, R. (ed.) Applications of cell immobilisation biotechnology Dordrecht, Germany Springer.

The metabolic role of methymalonyl CoA mutase in Escherichia coli
Kannan, S.M., Dwek, M., Bucke, C. and Roy, I. 2005. The metabolic role of methymalonyl CoA mutase in Escherichia coli. Proceedings of Viteomics: structure and function of vitamins and cofactors. Cambridge, UK 2005

Polysaccharides and polysaccharide-modifying enzymes in Ganoderma species
Chouiter, R., Roy, I. and Bucke, C. 2005. Polysaccharides and polysaccharide-modifying enzymes in Ganoderma species. Proceedings of the 13th European Carbohydrate Symposium. Bratislava, Slovakia 21 - 26 Aug 2005

Polysaccharide-modifying enzymes from Ganoderma species and their applications
Chouiter, R., Roy, I. and Bucke, C. 2005. Polysaccharide-modifying enzymes from Ganoderma species and their applications. Proceedings of the 1st International Conference on Environmental Industrial and Applied Microbiology. Badajoz, Spain 15 - 18 Mar 2005

Phylogenetic relationships between Basidiomycetes believed to be Ganoderma species based on distance analysis of their 5.8S, ITS1 and ITS2 rDNA sequences
Chouiter, R., Roy, I. and Bucke, C. 2005. Phylogenetic relationships between Basidiomycetes believed to be Ganoderma species based on distance analysis of their 5.8S, ITS1 and ITS2 rDNA sequences. Proceedings of the 1st International Conference on Environmental Industrial and Applied Microbiology. Badajoz, Spain 15 - 18 Mar 2005

Elicitor effects on Penicillium chrysogenum morphology in submerged cultures
Radman, R., Bucke, C. and Keshavarz, T. 2004. Elicitor effects on Penicillium chrysogenum morphology in submerged cultures. Biotechnology and Applied Biochemistry. 40 (3), pp. 229-233.

Effects of low dose ADMA on gene expression in human coronary artery endothelial cells
Smith, C.L., Leiper, J.M. and Vallance, P. 2004. Effects of low dose ADMA on gene expression in human coronary artery endothelial cells. Nitric Oxide: Biology and Chemistry. 11 (1), p. 59.

Restoration of nitric oxide production by N-hydroxy-L-arginine in endothelial cells with NO deficiency triggered by elevated glucose
Crabtree, M.J., Smith, C.L. and Gross, S.S. 2004. Restoration of nitric oxide production by N-hydroxy-L-arginine in endothelial cells with NO deficiency triggered by elevated glucose. Nitric Oxide: Biology and Chemistry. 11 (1), p. 65.

The influence of small oligosaccharides on the immune system
Bland, E.J., Keshavarz, T. and Bucke, C. 2004. The influence of small oligosaccharides on the immune system. Carbohydrate Research. 339 (10), pp. 1673-1678.

‘Identification and isolation of polyhydroalkanoates and cloning of PHA biosynthetic genes from Bacillus cereus SPV
Valappil, S.P., Bucke, C. and Roy, I. 2004. ‘Identification and isolation of polyhydroalkanoates and cloning of PHA biosynthetic genes from Bacillus cereus SPV. Proceedings of the International Symposium on Biological Polyesters, ISBP. Beijing, China 22 - 28 Aug 2004

Biosynthesis of polyhydroxyalkanoic acids by Streptomyces coelicolor
Valappil, S.P., Bhatia, Y., Bucke, C. and Roy, I. 2004. Biosynthesis of polyhydroxyalkanoic acids by Streptomyces coelicolor. e-Polymers.

Effects of low dose ADMA on gene expression in human coronary artery endothelial cells
Smith, C.L., Leiper, J.M. and Vallance, P. 2004. Effects of low dose ADMA on gene expression in human coronary artery endothelial cells. 3rd International Conference on the Biology, Chemistry and Therapeutic Applications of Nitric Oxide: 4th Anuual Scientific Meeting of the Nitric Oxide Society of Japan. Nara, Japan 24-28 May 2004

Polyhydroxyalkanoate production by Bacillus cereus SPV
Roy, I. 2004. Polyhydroxyalkanoate production by Bacillus cereus SPV. Proceedings of the International Symposium on Biological Polyesters, ISBP. Beijing, China 22 - 28 Aug 2004

Morphological changes in the submerged cultures of Penicillium chrysogenum: elicitor effects
Radman, R., Bucke, C. and Keshavarz, T. 2004. Morphological changes in the submerged cultures of Penicillium chrysogenum: elicitor effects. in: Pierucci, S. (ed.) 6th Italian Conference on Chemical and Process Engineering: ICheaP 6, June 8-11, 2003, Pisa, Italy Italy Associazione Italiana Di Ingegneria Chimica.

Restoration of nitric oxide production by N-hydroxyarginine in endothelial cells with NO deficiency triggered by elevated glucose
Crabtree, M.J., Smith, C.L. and Gross, S.S. 2004. Restoration of nitric oxide production by N-hydroxyarginine in endothelial cells with NO deficiency triggered by elevated glucose. 3rd International Conference on the Biology, Chemistry and Therapeutic Applications of Nitric Oxide: 4th Anuual Scientific Meeting of the Nitric Oxide Society of Japan. Nara, Japan 24-28 May 2004

Carbohydrates and carbohydrate active enzymes in Ganoderma applanatum
Budala, S., Bucke, C. and Roy, I. 2004. Carbohydrates and carbohydrate active enzymes in Ganoderma applanatum. Proceedings of the 22nd International Carbohydrate Symposium. Glasgow, UK 23 - 27 Jul 2004

Elicitor effects on reactive oxygen species in liquid cultures of Penicillium chrysogenum
Radman, R., Bucke, C. and Keshavarz, T. 2004. Elicitor effects on reactive oxygen species in liquid cultures of Penicillium chrysogenum. Biotechnology Letters. 26 (2), pp. 147-152.

Dimethylarginine dimethylaminohydrolase activity modulates ADMA levels, VEGF expression, and cell phenotype
Smith, C.L., Birdsey, G.M., Anthony, S., Arrigoni, F.I., Leiper, J.M. and Vallance, P. 2003. Dimethylarginine dimethylaminohydrolase activity modulates ADMA levels, VEGF expression, and cell phenotype. Biochemical and Biophysical Research Communications. 308 (4), pp. 984-989.

5-Aminolevulinic acid synthase: mechanism, mutations and medicine
Shoolingin-Jordan, P., Al-Daihan, S., Alexeev, D., Baxter, R.L., Bottomley, S.S., Kahari, I.D., Roy, I., Sarwar, M., Sawyer, L. and Wang, S.F. 2003. 5-Aminolevulinic acid synthase: mechanism, mutations and medicine. Biochimica et Biophysica Acta: Proteins and Proteomics. 1647 (1-2), pp. 361-365.

5-aminolevulinic acid synthase: mechanism, mutations and medicine
Shoolingin-Jordan, P., Al-Daihan, S., Alexeev, D., Baxter, R.L., Bottomley, S.S., Kahari, D., Roy, I., Sarwar, M., Sawyer, L. and Wang, S.F. 2003. 5-aminolevulinic acid synthase: mechanism, mutations and medicine. Biochimica et Biophysica Acta: Proteins and Proteomics. 1647 (1-2), pp. 361-366.

Elicitation of plants and microbial cell systems
Radman, R., Saez, T., Bucke, C. and Keshavarz, T. 2003. Elicitation of plants and microbial cell systems. Biotechnology and Applied Biochemistry. 37 (1), pp. 91-102.

Biosynthesis of medium chain length polyhydroxyalakanoic acids by Streptomyces coelicolor
Valappil, S.P., Bucke, C. and Roy, I. 2003. Biosynthesis of medium chain length polyhydroxyalakanoic acids by Streptomyces coelicolor. ICBP 2003. Proceedings of the 1st IUPAC International Conference on Bio-Based Polymers. Saitama, Japan 12 - 14 Nov 2003

Transformation of high concentrations of chlorophenols by the white-rot basidiomycete Trametes versicolor immobilized on nylon mesh
Sedarati, M.R., Keshavarz, T., Leontievsky, A. and Evans, C.S. 2003. Transformation of high concentrations of chlorophenols by the white-rot basidiomycete Trametes versicolor immobilized on nylon mesh. Electronic Journal of Biotechnology. 6 (2), pp. 104-114.

A process comparison between production of antibody fragments in E. coli and in Aspergillus awamori
Keshavarz, T. and Keshavarz-Moore, E. 2003. A process comparison between production of antibody fragments in E. coli and in Aspergillus awamori. in: Pierucci, S. (ed.) 6th Italian Conference on Chemical and Process Engineering: ICheaP 6, June 8-11, 2003, Pisa, Italy Italy Associazione Italiana Di Ingegneria Chimica.

A possible role of poly-3-hydroxybutyric acid in antibiotic production in Streptomyces
Verma, S., Bhatia, Y., Valappil, S.P. and Roy, I. 2002. A possible role of poly-3-hydroxybutyric acid in antibiotic production in Streptomyces. Archives of Microbiology. 179 (1), pp. 66-69.

Biosynthesis of polyhydroxyalkanoates by Streptomyces coelicolor
Valappil, S.P., Bucke, C. and Roy, I. 2002. Biosynthesis of polyhydroxyalkanoates by Streptomyces coelicolor. Proceedings of the International Symposium on Biological Polyesters. Munster, Germany 22 - 26 Sep 2002

The redox status of bound pterin cofactor determines whether eNOS produces NO or superoxide anion: [3H] - BH4 binding studies provide insights into vascular pathophysiology
Jones, C.L., Vasquez-Vivar, J., Kalyanaraman, B., Griscavage-Ennis, J.M., Gross, S.S. and Smith, C.L. 2002. The redox status of bound pterin cofactor determines whether eNOS produces NO or superoxide anion: [3H] - BH4 binding studies provide insights into vascular pathophysiology. in: Milstien, S., Kapatos, G., Levine, R.A. and Shane, B. (ed.) Chemistry and biology of pteridines and folates: proceedings of the 12th International Symposium on Pteridines and Folates, National Institutes of Health, Bethesda, M.D. Boston, USA Kluwer Academic Publishers. pp. 271-276

Activation and inactivation of neuronal nitric oxide synthase: characterization of Ca2+-dependent [125I]Calmodulin binding
Weissman, B.A., Jones, C.L., Liu, Q., Gross, S.S. and Smith, C.L. 2002. Activation and inactivation of neuronal nitric oxide synthase: characterization of Ca2+-dependent [125I]Calmodulin binding. European Journal of Pharmacology. 435 (1), pp. 9-18.

Factors affecting the production of a single-chain antibody fragment by Aspergillus awamori in a stirred tank reactor
Sotiriadis, A., Keshavarz, T. and Keshavarz-Moore, E. 2001. Factors affecting the production of a single-chain antibody fragment by Aspergillus awamori in a stirred tank reactor. Biotechnology Progress. 17 (4), pp. 618-623.

Production of polyhydroxybutyrate by streptomyces
Verma, S. and Roy, I. 2001. Production of polyhydroxybutyrate by streptomyces. Proceedings of the Gordon Research Conference. Connecticut, USA 2001

Production of lipolytic enzymes in batch cultures of Ophiostoma piceae
Tamerler, C., Martinez, A. and Keshavarz, T. 2001. Production of lipolytic enzymes in batch cultures of Ophiostoma piceae. Journal of Chemical Technology and Biotechnology. 76 (9), pp. 991-996.

Effect of mannan and alginate oligosaccharides on production in bioreactors of penicillin G and its biosynthetic intermediates
Tamerler, C., Ariyo, B., Bucke, C. and Keshavarz, T. 2001. Effect of mannan and alginate oligosaccharides on production in bioreactors of penicillin G and its biosynthetic intermediates. Annals of Microbiology. 51 (1), pp. 53-60.

Effect of pH and loading manner on the start-up period of peat biofilter degrading xylene and toluene mixture
Marek, J., Paca, J., Halecky, M., Koutsky, B., Sobotka, M. and Keshavarz, T. 2001. Effect of pH and loading manner on the start-up period of peat biofilter degrading xylene and toluene mixture. Folia Microbiologica. 76 (9), pp. 205-209.

Using 2',7'-dichlorodihydrofluorescein-diacetate to assess polysaccharides as immunomodulating agents
Brand, E., Keshavarz, T. and Bucke, C. 2001. Using 2',7'-dichlorodihydrofluorescein-diacetate to assess polysaccharides as immunomodulating agents. Molecular Biotechnology. 19 (2), pp. 125-131.

Lipolytic enzyme production in batch and fed-batch cultures of Ophiostoma piceae and Fusarium oxysporum
Tamerler, C. and Keshavarz, T. 2000. Lipolytic enzyme production in batch and fed-batch cultures of Ophiostoma piceae and Fusarium oxysporum. Journal of Chemical Technology and Biotechnology. 75 (9), pp. 785-790.

Enhancement of chrysogenin production in cultures of Penicillium chrysogenum by uronic acid oligosaccharides
Asilonu, E., Bucke, C. and Keshavarz, T. 2000. Enhancement of chrysogenin production in cultures of Penicillium chrysogenum by uronic acid oligosaccharides. Biotechnology Letters. 22 (11), pp. 931-936.

Phosphorylation of the periplasmic binding protein in two transport systems for arginine incorporation in Escherichia coli K-12 is unrelated to the function of the transport system
Celis, R.T.F., Leadlay, P.F., Roy, I. and Hansen, A. 1998. Phosphorylation of the periplasmic binding protein in two transport systems for arginine incorporation in Escherichia coli K-12 is unrelated to the function of the transport system. Journal of Bacteriology. 180 (18), pp. 4828-4833.

Metabolic Engineering, a route to the production of novel products
Roy, I. 1998. Metabolic Engineering, a route to the production of novel products. Proceedings of the National Conference on Bioprocessing and R-DNA Technology. Central Drug Research Institute, Lucknow, India 27 - 28 Mar 1998

An autoinhibitory control element defines calcium-regulated isoforms of nitric oxide synthase
Salerno, J.C., Harris, D.E., Irizarry, K., Patel, B., Morales, A.J., Smith, S.M.E., Martasek, P., Roman, L.J., Masters, B.S.S., Jones, C.L., Weissman, B.A., Lane, P., Liu, Q., Gross, S.S. and Smith, C.L. 1997. An autoinhibitory control element defines calcium-regulated isoforms of nitric oxide synthase. Journal of Biological Chemistry. 272 (47), pp. 29769-29777.

A Methylmalonyl-CoA mutase in Escherichia coli?
Roy, I. and Leadlay, P.F. 1997. A Methylmalonyl-CoA mutase in Escherichia coli? in: Ahmad, F. (ed.) Advances in gene technology: biomolecular design, form and function Nature Publishing Group.

The masked cysteine residues in methylmalonyl-CoA mutase from Propionibacterium shermanii are essential for catalytic activity
Roy, I. 1996. The masked cysteine residues in methylmalonyl-CoA mutase from Propionibacterium shermanii are essential for catalytic activity. FEBS Letters. 394 (2), pp. 126-128.

Physical map location of the new Escherichia coli gene sbm
Roy, I. and Leadlay, P.F. 1992. Physical map location of the new Escherichia coli gene sbm. Journal of Bacteriology. 174 (17), pp. 5763-5764.

Mechanism and structure of a coenzyme-B12 dependent enzyme
Roy, I., Patchett, M.L., Keep, N.H. and Leadlay, P.F. 1990. Mechanism and structure of a coenzyme-B12 dependent enzyme. Proceedings of the Royal Society of Chemistry Fifth International Symposium on the Mechanisms of Reactions in Solution. University of Kent, UK 02 - 06 Jul 1990

The expression of adenosylcobalamin dependent methylmalonyl-CoA mutase from Propionibacterium shermanii in Escherichia coli
McKie, N., Keep, N.H., Roy, I., Patchett, M.L. and Leadlay, P.F. 1989. The expression of adenosylcobalamin dependent methylmalonyl-CoA mutase from Propionibacterium shermanii in Escherichia coli. Proceedings of the Royal Society of Chemistry International Symposium on the Molecular Mechanisms in Bioorganic Processes. University of Newcastle upon Tyne, UK 17 - 20 Jul 1989

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