ORCID Profile
0000-0003-2356-1153
Current Organisation
University of Tasmania
Does something not look right? The information on this page has been harvested from data sources that may not be up to date. We continue to work with information providers to improve coverage and quality. To report an issue, use the Feedback Form.
Publisher: SAGE Publications
Date: 28-04-2021
DOI: 10.1177/09670335211006526
Abstract: Incorporating chemical traits in breeding requires the estimation of quantitative genetic parameters, especially the levels of additive genetic variation. This requires large numbers of s les from pedigreed populations. Conventional wet chemistry procedures for chemotyping are slow, expensive and not a practical option. This study focuses on the chemical variation in Pinus radiata, where the near infrared (NIR) spectral properties of the needles, bark and roots before and after exposure to methyl jasmonate (MJ) and artificial bark stripping (strip) treatments were investigated as an alternative approach. The aim was to test the capability of NIR spectroscopy to (i) discriminate s les exposed to MJ and strip assessed 7, 14, 21 and 28 days after treatment from untreated s les, and (ii) quantitatively predict in idual chemical compounds in the three plant parts. Using principal components analysis (PCA) on the spectral data, we differentiated between treated and untreated s les for the in idual plant parts. Based on partial least squares–discriminant analysis (PLS-DA) models, the best discrimination of treated from non-treated s les with the smallest root mean square error cross-validation (RMSECV) and highest coefficient of determination (r 2 ) was achieved in the fresh needles (r 2 = 0.81, RMSECV= 0.24) and fresh inner bark (r 2 = 0.79, RMSECV = 0.25) for MJ-treated s les 14 days and 21 days after treatment, respectively. Using partial least squares regression, models for in idual compounds gave high (r 2 ), residual predictive deviation (RPD), lab to NIR error (PRL) or range error ratio (RER) for fructose (r 2 = 0.84, RPD = 1.5, PRL = 0.71, RER = 7.25) and glucose (r 2 = 0.83, RPD = 1.9, PRL = 1.14, RER = 8.50) and several diterpenoids. This provides an optimistic outlook for the use of NIR spectroscopy-based models for the larger-scale prediction of the P. radiata chemistry needed for quantitative genetic studies.
Publisher: Oxford University Press (OUP)
Date: 10-01-2017
DOI: 10.1093/AOB/MCW266
Publisher: American Chemical Society (ACS)
Date: 22-12-2022
Publisher: Springer Science and Business Media LLC
Date: 23-09-2022
Publisher: Elsevier BV
Date: 12-2012
Abstract: The potential of a near infrared spectroscopy (NIR) method to detect as well as predict microbial spoilage on Atlantic salmon (Salmo salar) was investigated. Principal component analysis (PCA) of the NIR spectra showed clear separation between the fresh salmon fillets and those stored for nine days at 4°C indicating that NIR could detect spoilage. A partial least squares regression (PLS) prediction model for total aerobic plate counts after nine days was established using the NIR spectra collected when the fish was fresh to predict the number of bacteria that would be present nine days later. The calibration equation was good (R(2) = 0.95 and RMSE = 0.12 log cfu/g) although the error of the validation curve was larger (R(2) = 0.64 and RMSE = 0.32 log cfu/g). These results indicate that with further model development, it may be possible to use NIR to predict bacterial numbers, and hence shelf-life, in Atlantic salmon and other seafood.
Publisher: Oxford University Press (OUP)
Date: 23-10-2015
Abstract: Water deficit associated with drought can severely affect plants and influence ecological interactions involving plant secondary metabolites. We tested the effect of mild water deficit and rewatering on physiological, morphological and chemical traits of juvenile Eucalyptus globulus Labill. and Eucalyptus viminalis Labill. We also tested if responses of juvenile eucalypts to water deficit and rewatering varied within species using provenances across a rainfall gradient. Both species and all provenances were similarly affected by mild water deficit and rewatering, as only foliar abscisic acid levels differed among provenances during water deficit. Across species and provenances, water deficit decreased leaf water potential, above-ground biomass and formylated phloroglucinol compound concentrations, and increased condensed tannin concentrations. Rewatering reduced leaf carbon : nitrogen, and total phenolic and chlorogenic acid concentrations. Water deficit and rewatering had no effect on total oil or in idual terpene concentrations. Levels of trait plasticity due to water deficit and rewatering were less than levels of constitutive trait variation among provenances. The overall uniformity of responses to the treatments regardless of native provenance indicates limited ersification of plastic responses when compared with the larger quantitative variation of constitutive traits within these species. These responses to mild water deficit may differ from responses to more extreme water deficit or to responses of juvenile/mature eucalypts growing at each locality.
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 07-2016
Publisher: Geological Society of America
Date: 05-2013
DOI: 10.1130/G34066.1
Publisher: Elsevier BV
Date: 02-2009
Publisher: International Society for Horticultural Science (ISHS)
Date: 06-2021
Publisher: Springer Science and Business Media LLC
Date: 27-02-2017
DOI: 10.1038/NGEO2902
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5PY02012C
Abstract: Oil-in-water (‘inverse’) High Internal Phase Emulsions (HIPEs) have been prepared using an hiphilic macro-RAFT agent with toluene as the internal dispersed phase (∼80 vol%) and an aqueous monomer solution as the continuous phase.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CC33693F
Abstract: A laser-patterned microchip electrophoresis device with integrated polymer electrodes for DC high voltages and AC capacitively-coupled contactless conductivity detection was developed. Electrophoresis separations comparable to devices with metal electrodes were obtained, at approximately 20 times lower cost.
Publisher: Elsevier BV
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 18-10-2021
Publisher: Geological Society of America
Date: 21-11-2016
DOI: 10.1130/G38517.1
Publisher: Springer Science and Business Media LLC
Date: 2019
Publisher: Elsevier BV
Date: 04-2020
Publisher: Wiley
Date: 08-01-2021
Publisher: Public Library of Science (PLoS)
Date: 21-07-2016
Publisher: American Chemical Society (ACS)
Date: 07-05-2009
DOI: 10.1021/JA902799U
Abstract: A study of the reaction of PtMe(2)(bipy) with IPh(C[triple bond]CSiMe(3))(OTf) at low temperature in acetone, leading to detection of the Pt-Pt-bonded cation [Pt(2)Me(4)(C[triple bond]CSiMe(3))(bipy)(2)](+), an intermediate in the oxidation of Pt(II) to Pt(IV), is reported. The cation is assessed as Pt(III)-Pt(III) Pt(IV)-Pt(II), and at the other extreme may be regarded as a cationic alkynylplatinum(IV) center, "[Pt(IV)Me(2)(C[triple bond]CSiMe(3))(bipy)](+)", stabilized by "Pt(II)Me(2)(bipy)" as a donor ligand. The detection and isolation of the [Pt(2)Me(4)(C[triple bond]CSiMe(3))(bipy)(2)](+) cation provides a number of insights into the mechanisms of oxidation reactions.
Publisher: American Chemical Society (ACS)
Date: 04-06-2004
DOI: 10.1021/OM040023C
Publisher: Elsevier BV
Date: 07-2011
Publisher: Springer Science and Business Media LLC
Date: 11-12-2015
Publisher: Pleiades Publishing Ltd
Date: 09-2015
Publisher: Wiley
Date: 21-02-2020
DOI: 10.1002/JSFA.10253
Abstract: Near-infrared reflectance spectroscopy (NIRS) technology can be a powerful analytical technique for the assessment of plant starch, but generally s les need to be freeze-dried and ground. This study investigated the feasibility of using NIRS technology to quantify starch concentration in ground and intact grapevine cane wood s les (with or without the bark layer). A partial least squares regression was used on the s le spectral data and was compared against starch analysis using a conventional wet chemistry method. Accurate calibration models were obtained for the ground cane wood s les (n = 220), one based on 17 factors (R As indicated by low RMSECV values, NIRS technology has the potential to monitor grapevine starch reserves in intact cane wood s les. © 2020 Society of Chemical Industry.
Publisher: American Chemical Society (ACS)
Date: 05-06-2008
DOI: 10.1021/OM800122K
Publisher: Springer Science and Business Media LLC
Date: 08-2015
Publisher: CSIRO Publishing
Date: 2001
DOI: 10.1071/CH01114
Abstract: 6-Butyl-5,6-dihydrobenzimidazo[2,1-a]isoquinoline, 3,9- and 3,10-dimethoxy, and 3,9- and 3,10-dihydroxy analogues, and their 12-methyl quaternary salts were prepared by a multistep route. Cytotoxicities against 55 human cancer cell lines were measured in the National Cancer Institute screen. The quaternary salts of the dimethoxy compounds (15b/c) were clearly the most active overall, with a mean graph midpoint (MGM) value of 2 m.
Publisher: Elsevier BV
Date: 11-2003
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 02-2023
Publisher: Elsevier BV
Date: 12-2006
Publisher: Elsevier BV
Date: 02-2018
Publisher: CSIRO Publishing
Date: 1998
DOI: 10.1071/C98115
Abstract: The reaction of the isocoumarin derivative 1-acetylimino-3-methyl-1H-2-benzopyran-4-carbonitrile (1a) with aromatic ortho diamines provides entry to the benzimidazo[2,1-a]isoquinoline and related systems. Various conversions of the methyl and cyano groups in the tetracycles into amide, aldehyde and acid functions have been carried out, along with studies of electrophilic nitration.
Publisher: Springer International Publishing
Date: 2017
Publisher: Wiley
Date: 11-1998
Publisher: Wiley
Date: 09-2001
Publisher: CSIRO Publishing
Date: 2008
DOI: 10.1071/CH08160
Abstract: Flow-through microreactors are described, constructed of fused silica capillaries with an internal diameter of 100 μm and glass microchips with a channel dimension of 150 μm and involving the in situ UV-initiated synthesis of a poly(glycidyl methacrylate-co-ethylene dimethacrylate) porous polymer monolith. The monolith is a continuous material covalently bonded to the capillary or chip walls, with good flow-through properties. Epoxide ring-opening through amine attack by 5-amino-1,10-phenanthroline and coordination to dichloropalladium(ii) allows use of the microreactors for Suzuki–Miyaura catalysis. The long-term stability and reliability of the robust chip microreactor is demonstrated by operation for 96 h, exhibiting undiminished reactivity, and very low leaching of palladium.
Publisher: American Chemical Society (ACS)
Date: 07-2006
DOI: 10.1021/OM0601495
Publisher: Wiley
Date: 11-03-2001
Publisher: Elsevier BV
Date: 02-2018
Publisher: American Chemical Society (ACS)
Date: 30-11-2004
DOI: 10.1021/AC049237U
Abstract: A new compound class of synthetic isoelectric buffers is introduced, designed as a small molecule with one fully or prevailingly dissociated acidic group (such as sulfonic or carboxylic) and two partly pronated (buffering) basic amino groups attached onto a hydrophilic UV-transparent backbone. As an ex le, a new isoelectric compound 2,2-bis(4-morpholinylmethyl)propanoic acid (BMMPA) was synthesized by attaching two morpholine groups onto a molecule of pivalic acid. It was characterized as having an isoelectric point pI = 6.5 and exhibiting satisfactory buffering capacity at the pI. Solutions of BMMPA are transparent down to the low-UV spectral region, thus making it a potentially suitable buffer for a number of separation methods. Its use in capillary electrophoresis was demonstrated in a separation system for indirect photometric detection of anions based on an electrolyte with the anionic dye Orange G as the indirect detection probe and using BMMPA as a buffer. The use of an isoelectric buffering compound brings the advantages of a buffered electrolyte without the concomitant introduction of co-ions that would be detrimental to the indirect detection process. Submicromole per liter limits of detection for a number of inorganic and small organic ions were achieved. Optimal structural properties of the isoelectric buffer with respect to its buffering properties are discussed.
Publisher: American Chemical Society (ACS)
Date: 05-02-2003
DOI: 10.1021/JM020420U
Abstract: The reaction of 4-dimethylaminomethylene-6-methyl-4H-pyrano[4,3-b]quinoline-1,3-dione with a range of primary amines gave rise to a series of 2-substituted 6-methyl-1-oxo-1,2-dihydrobenzo[b][1,6]naphthyridine-4-carboxylic acids. The derived 4-N-[2-(dimethylamino)ethyl]carboxamides were tested for growth inhibitory properties against murine P388 leukemia, Lewis lung carcinoma (LLTC), and human Jurkat leukemia cell lines. Most compounds were potent cytotoxins, with some having IC(50) values less than 10 nM. Five were tested in vivo against subcutaneous colon 38 tumors in mice, and a single dose (3.9 mg/kg) proved to be curative for the 2-methyl and 2-(3,4-dimethoxyphenyl) derivatives in this refractory model.
Publisher: Springer Science and Business Media LLC
Date: 06-02-2020
Publisher: Oxford University Press (OUP)
Date: 26-09-2016
Abstract: Near-infrared reflectance spectroscopy (NIRS) is frequently used for the assessment of key nutrients of forage or crops but remains underused in ecological and physiological studies, especially to quantify non-structural carbohydrates. The aim of this study was to develop calibration models to assess the content in soluble sugars (fructose, glucose, sucrose) and starch in foliar material of Eucalyptus globulus. A partial least squares (PLS) regression was used on the s le spectral data and was compared to the contents measured using standard wet chemistry methods. The calibration models were validated using a completely independent set of s les. We used key indicators such as the ratio of prediction to deviation (RPD) and the range error ratio to give an assessment of the performance of the calibration models. Accurate calibration models were obtained for fructose and sucrose content (R2 > 0.85, root mean square error of prediction (RMSEP) of 0.95%–1.26% in the validation models), followed by sucrose and total soluble sugar content (R2 ~ 0.70 and RMSEP > 2.3%). In comparison to the others, calibration of the starch model performed very poorly with RPD = 1.70. This study establishes the ability of the NIRS calibration model to infer soluble sugar content in foliar s les of E. globulus in a rapid and cost-effective way. We suggest a complete redevelopment of the starch analysis using more specific quantification such as an HPLC-based technique to reach higher performance in the starch model. Overall, NIRS could serve as a high-throughput phenotyping tool to study plant response to stress factors.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7PY01770G
Abstract: A series of polymerized high internal phase emulsion (polyHIPE) materials have been prepared by using a water in oil emulsion stabilized by a macro-RAFT agent, 2-(butylthiocarbonothioylthio)-2-poly(styrene)- b -poly(acrylic acid), acting as a polymeric surfactant.
Publisher: Springer International Publishing
Date: 19-10-2016
Publisher: Springer Science and Business Media LLC
Date: 11-01-2017
DOI: 10.1007/S00216-016-0164-Y
Abstract: Non-specific protein adsorption on hydrophobic solid phase extraction (SPE) adsorbents can reduce the efficacy of purification. To improve s le clean-up, poly( inyl benzene) (PDVB) monoliths grafted with hydrophilic polyethylene glycol methacrylate (PEGMA) were developed. Residual vinyl groups (RVGs) of the PDVB were employed as anchor points for PEGMA grafting. Two PEGMA monomers, M
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4JA00011K
Publisher: Wiley
Date: 17-10-2020
DOI: 10.1002/JSFA.10869
Publisher: Elsevier
Date: 2007
Publisher: Elsevier BV
Date: 2005
Publisher: Elsevier BV
Date: 09-2009
Start Date: 2016
End Date: 2020
Funder: Department of Agriculture
View Funded ActivityStart Date: 2006
End Date: 2008
Funder: Australian Research Council
View Funded ActivityStart Date: 2016
End Date: 2020
Funder: Australian Grape and Wine Authority
View Funded Activity