ORCID Profile
0000-0003-2999-8700
Current Organisation
Queensland University of Technology (QUT)
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Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA07122H
Abstract: Simple lignin model compounds containing β-O-4 aryl ether linkages have been utilized as a means to understand lignin depolymerisation.
Publisher: Elsevier BV
Date: 02-2019
Publisher: Wiley
Date: 27-12-2017
DOI: 10.1111/IJFS.13708
Publisher: MDPI AG
Date: 18-08-2014
DOI: 10.3390/EN7085317
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RE00241K
Abstract: At a time of rapid depletion of oil resources, global food shortages and solid waste problems, it is imperative to encourage research into the use of appropriate pre-treatment techniques using regenerative raw materials such as lignocellulosic biomass.
Publisher: American Chemical Society (ACS)
Date: 24-04-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8RA08971J
Abstract: A microbial oil production process consisting of acidified glycerol pretreatment of sugarcane bagasse, enzymatic hydrolysis, microbial oil production by M. isabellina NRRL 1757 and oil recovery by hydrothermal liquefaction of fungal biomass in fermentation broth was assessed.
Publisher: Frontiers Media SA
Date: 30-03-2015
Publisher: Public Library of Science (PLoS)
Date: 03-12-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA04286K
Abstract: Depolymerization of purified organosolv eucalyptus wood lignin by heterogeneous catalyst – calcium phosphate (β-CaP 2 O 6 ) in methanol–water solvent at 300 °C resulted in a total syringol yield of 16.7%.
Publisher: Wiley
Date: 11-07-2018
DOI: 10.1002/BAB.1573
Abstract: As promising alternatives to fossil-derived oils, microbial lipids are important as industrial feedstocks for biofuels and oleochemicals. Our broad aim is to increase lipid content in oleaginous yeast through expression of lipid accumulation genes and use Saccharomyces cerevisiae to functionally assess genes obtained from oil-producing plants and microalgae. Lipid accumulation genes DGAT (diacylglycerol acyltransferase), PDAT (phospholipid: diacylglycerol acyltransferase), and ROD1 (phosphatidylcholine: diacylglycerol choline-phosphotransferase) were separately expressed in yeast and lipid production measured by fluorescence, solvent extraction, thin layer chromatography, and gas chromatography (GC) of fatty acid methyl esters. Expression of DGAT1 from Arabidopsis thaliana effectively increased total fatty acids by 1.81-fold above control, and ROD1 led to increased unsaturated fatty acid content of yeast lipid. The functional assessment approach enabled the fast selection of candidate genes for metabolic engineering of yeast for production of lipid feedstocks.
Publisher: Elsevier BV
Date: 12-2020
Publisher: MDPI AG
Date: 02-02-2023
Abstract: The utilisation of edible sources of starch such as corn, wheat, potato, and cassava has become the common approach to develop biodegradable food packaging. However, the future food security issue from the wide application of such edible starch sources has become a major concern. Consequently, exploring non-edible sources of starch for starch-based biodegradable food packaging and their property enhancement have become one of the common research interests. Although there has been a great potentials of synthesising biodegradable food packaging by direct utilisation of agro-industrial waste cassava bagasse, there have been very limited studies on this. In this context, the current study investigated the potential of developing biodegradable food packaging by directly using cassava bagasse as an alternative matrix. Two film-forming mixtures were prepared by incorporating glycerol (30% and 35%), powdered cassava bagasse and water. The films were hot-pressed at 60 °C, 100 °C, and 140 °C temperatures under 0.28 t pressure for 6 min. The best film-forming mixture and temperature combination was further tested with 0.42 t and 0.84 t pressures, followed by analysing their morphology, functional group availability and the thermal stability. Accordingly, application of 35% glycerol, with 100 °C, 0.42 t temperature and pressure, respectively, were found to be promising for film preparation. The absence of starch agglomerates in film surfaces with less defects suggested satisfactory dispersion and compatibility of starch granules and glycerol. The film prepared under 0.42 t exhibited slightly higher thermal stability. Synthesised prototypes of food packaging and the obtained characterisation results demonstrated the high feasibility of direct utilisation of cassava bagasse as an alternative, non-edible matrix to synthesise biodegradable food packaging.
Publisher: Elsevier BV
Date: 12-2017
Publisher: Wiley
Date: 30-07-2020
Publisher: Elsevier BV
Date: 03-2015
DOI: 10.1016/J.BIORTECH.2014.12.098
Abstract: Isolated and purified organosolv eucalyptus wood lignin was depolymerized at different temperatures with and without mesostructured silica catalysts (i.e., SBA-15, MCM-41, ZrO2-SBA-15 and ZrO2-MCM-41). It was found that at 300°C for 1h with a solid/liquid ratio of 0.0175/1 (w/v), the SBA-15 catalyst with high acidity gave the highest syringol yield of 23.0% in a methanol/water mixture (50/50, wt/wt). Doping with ZrO2 over these catalysts did not increase syringol yield, but increased the total amount of solid residue. Gas chromatography-mass spectrometry (GC-MS) also identified other main phenolic compounds such as 1-(4-hydroxy-3,5-dimethoxyphenyl)-ethanone, 1,2-benzenediol, and 4-hydroxy-3,5-dimethoxy-benzaldehyde. Analysis of the lignin residues with Fourier transform-infrared spectroscopy (FT-IR) indicated decreases in the absorption bands intensities of OH group, CO stretching of syringyl ring and aromatic CH deformation of syringol unit, and an increase in band intensities associated with the guaiacyl ring, confirming the type of products formed.
Publisher: Elsevier BV
Date: 11-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5RA20203E
Abstract: The highest CMF yield (81.9%) was achieved with acidic ionic liquid pretreated bagasse, which had a glucan content of 81.6%.
Publisher: Elsevier BV
Date: 08-2022
Publisher: Springer Science and Business Media LLC
Date: 03-05-2014
Publisher: Elsevier BV
Date: 08-2022
Publisher: Elsevier BV
Date: 08-2023
Publisher: Elsevier BV
Date: 02-2016
Publisher: Frontiers Media SA
Date: 31-07-2020
Publisher: Elsevier BV
Date: 02-2012
Publisher: Elsevier BV
Date: 09-2009
Publisher: Elsevier BV
Date: 07-2016
Publisher: Frontiers Media SA
Date: 25-04-2019
Publisher: Elsevier BV
Date: 04-2011
Publisher: No publisher found
Date: 2022
DOI: 10.1039/D2GC01303G
Publisher: Elsevier BV
Date: 11-2022
Publisher: Elsevier BV
Date: 03-2022
Publisher: American Chemical Society (ACS)
Date: 03-02-2015
DOI: 10.1021/JF502229F
Abstract: Sugar cane biomass is one of the most viable feedstocks for the production of renewable fuels and chemicals. Therefore, processing the whole of crop (WC) (i.e., stalk and trash, instead of stalk only) will increase the amount of available biomass for this purpose. However, effective clarification of juice expressed from WC for raw sugar manufacture is a major challenge because of the amounts and types of non-sucrose impurities (e.g., polysaccharides, inorganics, proteins, etc.) present. Calcium phosphate flocs are important during sugar cane juice clarification because they are responsible for the removal of impurities. Therefore, to gain a better understanding of the role of calcium phosphate flocs during the juice clarification process, the effects of impurities on the physicochemical properties of calcium phosphate flocs were examined using small-angle laser light scattering technique, attenuated total reflectance Fourier transformed infrared spectroscopy, and X-ray powder diffraction. Results on synthetic sugar juice solutions showed that the presence of SiO2 and Na(+) ions affected floc size and floc structure. Starch and phosphate ions did not affect the floc structure however, the former reduced the floc size, whereas the latter increased the floc size. The study revealed that high levels of Na(+) ions would negatively affect the clarification process the most, as they would reduce the amount of suspended particles trapped by the flocs. A complementary study on prepared WC juice using cold and cold/intermediate liming techniques was conducted. The study demonstrated that, in comparison to the one-stage (i.e., conventional) clarification process, a two-stage clarification process using cold liming removed more polysaccharides (≤19%), proteins (≤82%), phosphorus (≤53%), and SiO2 (≤23%) in WC juice but increased Ca(2+) (≤136%) and sulfur (≤200%).
Publisher: Wiley
Date: 12-12-2012
Publisher: Elsevier BV
Date: 11-2021
Publisher: Wiley
Date: 03-06-2021
Abstract: This paper investigates the carbonization of cotton gin trash (CGT) into carbon structures shaped under the influence of different operating conditions including the impact of endogenous fatty acids impurities present in CGT. As expected, both KOH activation and high carbonization temperature increase the material surface area and porosity. Furan and arene groups are formed from 400 °C to 800 °C but the proportion of the furan groups are highest at 600 °C. This is due to the conversion of the fatty acids in CGT to furan units. XRD data reveals the presence of three aromatic layers at 400 °C, followed by structural rearrangement to the formation of five stacks aromatic layers at 800 °C consisting mainly of protonated and non‐protonated condensed arene groups. Interestingly, a reduction in the number of aromatic structures is observed if no acid pretreatment of CGT to remove inorganic impurities is conducted prior to pyrolysis to 600 °C. Two potential applications of the synthesised carbons are shown one for the formation of 5‐hydroxymethylfurfural (80%) from fructose, which compares favorably to other porous carbon materials produced under harsher conditions, and another derived CGT carbon material which shows a good uptake of hydrogen for storage.
Publisher: Elsevier BV
Date: 07-2021
Publisher: American Chemical Society (ACS)
Date: 19-09-2016
Publisher: Elsevier BV
Date: 12-2011
Publisher: Elsevier BV
Date: 06-2018
Publisher: Elsevier BV
Date: 11-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA20081H
Abstract: In this study, the effects of an alkali-acid purification process on the properties of eucalyptus lignin isolated from a methyl isobutyl ketone (MIBK)/methanol/water-based organosolv fractionation process were evaluated.
Publisher: American Chemical Society (ACS)
Date: 30-01-2018
Publisher: Elsevier BV
Date: 07-2022
DOI: 10.1016/J.JAND.2022.01.012
Abstract: Practice guidelines for coronary heart disease and type 2 diabetes recommend promoting the Mediterranean dietary pattern (MDP), which improves cardiometabolic risk markers and may prevent disease progression and complications. It is unknown to what extent the MDP is recommended in routine care for patients with these conditions, particularly in multiethnic settings. The study aim was to explore multidisciplinary health care professionals' perspectives on recommending the MDP in routine care for patients with coronary heart disease or type 2 diabetes and barriers and enablers to its implementation. A qualitative description design was employed, utilizing semistructured in idual interviews to collect data. Fifty-seven clinicians (21 nurses, 19 doctors, 13 dietitians, and 4 physiotherapists) routinely managing relevant patients across hospital and community settings in a metropolitan health service in Australia participated in interviews between November 2019 and March 2020. Interviews were audiorecorded, transcribed verbatim, and analyzed using thematic analysis. Four overarching themes were identified highlighting that the MDP was not routinely recommended: current dietary practices (all clinicians perceived they had a role in dietary care but prioritization varied. There was a legacy of single nutrient-based strategies and disease silos) clinician-centered barriers to recommending MDP (limited MDP knowledge and practice skills and variable understanding and acceptance of evidence supporting its use. This was related to lack of education and training about the diet and personal interest/experience) organizational culture and resources influence dietary care (MDP not embedded in service culture or current clinic tools and resources, with limited dietary knowledge exchange within and across multidisciplinary teams) and perceived patient-centered barriers to implementation of MDP (socioeconomic challenges in a multicultural setting, and a lack of belief in patient capabilities to improve diet adherence). Clinician and organizational factors, compounded by perceptions about patient acceptance, influence recommendations of the MDP for patients with coronary heart disease or type 2 diabetes. These factors should be addressed to improve translation of MDP evidence into practice.
Publisher: American Chemical Society (ACS)
Date: 20-10-2023
Publisher: Elsevier BV
Date: 02-2006
Start Date: 2016
End Date: 2016
Funder: Australian Research Council
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