A5034205198- Fermentation and Sensory Analysis
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Horticultural and Viticultural Research
- Plant biochemistry and biosynthesis
- earthquake and tectonic studies
- Phytochemicals and Antioxidant Activities
- Geochemistry and Elemental Analysis
- Meat and Animal Product Quality
- Food Quality and Safety Studies
- Geophysical and Geoelectrical Methods
- Hydrocarbon exploration and reservoir analysis
- Mine drainage and remediation techniques
- Metal Extraction and Bioleaching
- Climate change and permafrost
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Analytical Chemistry and Chromatography
- Cryospheric studies and observations
- Fungal Biology and Applications
- Maritime and Coastal Archaeology
- Paleontology and Stratigraphy of Fossils
- Plant and animal studies
- High-pressure geophysics and materials
- Geomagnetism and Paleomagnetism Studies
University of South Carolina
2024
James Cook University
2000-2010
University of Sheffield
2009
Australian Wine Research Institute
1991-2006
University of Leeds
2005
The University of Adelaide
1991-2000
Cooperative Research Centre for Tissue Growth and Repair
1996
The University of Melbourne
1996
Goldsmiths University of London
1983-1990
University of London
1987
The free volatiles, as well those released from their glycosidically bound forms by acid or enzyme hydrolysis, have been analyzed for Chardonnay juices three successive vintages. One hundred eighty compounds were identified. Twenty-eight of these not previously reported grape components. More than seventy percent the total concentration volatile secondary metabolites comprised thirteen-carbon norisoprenoids, and mainly observed in acid- glycosidase enzyme-released fractions. Benzene...
Liberation of iron and potassium by widespread postmetamorphic albitization country rocks was one the likely contributing processes in formation both barren mineralized magnetite ± chalcopyrite + biotite gold hematite clinopyroxene actinolite apatite ironstones Cloncurry district Proterozoic Mount Isa block. Whole-rock geochemical data indicate nearly immobile Al, Ga, ±Ti, Zr during transformation a variety least altered toward albitite. The that addition Na from brine to rock accompanied...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydroxylated linalool derivatives as precursors of volatile monoterpenes muscat grapesPatrick J. Williams, Christopher R. Strauss, and Bevan WilsonCite this: Agric. Food Chem. 1980, 28, 4, 766–771Publication Date (Print):July 1, 1980Publication History Published online1 May 2002Published inissue 1 July 1980https://doi.org/10.1021/jf60230a037RIGHTS & PERMISSIONSArticle Views702Altmetric-Citations157LEARN ABOUT THESE METRICSArticle Views are the...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies on the hydrolysis of Vitis vinifera monoterpene precursor compounds and model .beta.-D glucosides rationalizing composition grapesPatrick J. Williams, Christopher R. Strauss, Bevan Wilson, Ralph A. Massy-WestroppCite this: Agric. Food Chem. 1982, 30, 6, 1219–1223Publication Date (Print):November 1, 1982Publication History Published online1 May 2002Published inissue 1 November...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChanges in free and glycosidically bound monoterpenes developing muscat grapesBevan Wilson, Christopher R. Strauss, Patrick J. WilliamsCite this: Agric. Food Chem. 1984, 32, 4, 919–924Publication Date (Print):July 1, 1984Publication History Published online1 May 2002Published inissue 1 July 1984https://doi.org/10.1021/jf00124a054RIGHTS & PERMISSIONSArticle Views647Altmetric-Citations122LEARN ABOUT THESE METRICSArticle Views are the...
The amount of free and glycosidically-bound forms linalool, geraniol, nerol, α-terpineol, <i>cis</i>- <i>trans</i>-furan linalool oxides, <i>trans</i>-pyran diendiol I (3,7-dimethylocta-l,5-diene-3,7-diol) were determined in the skin, juice (serum), pulp (pellet) fractions mature Muscat Alexandria, White Frontignac, Traminer grapes. grapes found to have terpene compositions reflecting those juices. In all varieties, geraniol nerol associated mostly with skins berries. Free uniformly...
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTNuisance Proteins of Wine Are Grape Pathogenesis-Related ProteinsElizabeth J. Waters, Neil Shirley, and Patrick WilliamsView Author Information The Australian Research Institute, P.O. Box 197, Glen Osmond, SA 5064, Australia, Protein DNA Analysis Facility, Department Plant Science, University Adelaide, AustraliaCite this: Agric. Food Chem. 1996, 44, 1, 3–5Publication Date (Web):January 18, 1996Publication History Received17 August...
A fraction containing the mannoproteins released during fermentation from winemaking strain of Saccharomyces cerevisiae, Maurivin PDM, was able to reduce visible protein haze in white wine. This protective mannoprotein material (HPM) could be recovered by either ultrafiltration or ethanol precipitation. The kinetics release both mannose- and glucose-containing polymers growth cycle PDM were determined as a guide HPM. Active HPM first detected culture supernatant when cells exponentially...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIdentification of heat-unstable wine proteins and their resistance to peptidasesElizabeth J. Waters, William. Wallace, Patrick WilliamsCite this: Agric. Food Chem. 1992, 40, 9, 1514–1519Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org/doi/10.1021/jf00021a008https://doi.org/10.1021/jf00021a008research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuantification of Glycosides in Grapes, Juices, and Wines through a Determination Glycosyl GlucosePatrick J. Williams, Wieslawa Cynkar, I. Leigh Francis, John D. Gray, Patrick G. Iland, Bryan CoombeCite this: Agric. Food Chem. 1995, 43, 1, 121–128Publication Date (Print):January 1995Publication History Published online1 May 2002Published inissue 1 January...
The precursors of vitispirane (two diastereoisomers), 1,1,6-trimethyl-l,2-dihydronaphthalene (TDN), damascenone, and a fourth unknown volatile norisoprenoid in Riesling wine were analyzed by droplet counter-current chromatography (DCCC). compounds monitored GC-MS after mild acid hydrolysis pooled DCCC fractions. Each the four volatiles was derived from several precursors. appear to include glycoconjugates involving different conjugating moieties also non-glycosidic compounds. vitispiranes...
A technique has been developed for the rapid assay of monoterpene flavorants grape juices. Steam distillation juice at neutrality yielded free aroma compounds while, low pH, monoterpenes derived from polyols and glycosidically bound forms were collected. Reaction these distillates with a vanillinsulfuric acid reagent gave color, intensity which was proportional to concentration in two fractions. Thus analytical figures volatile terpenes (FVT) potential (PVT) obtained. The presence sulfur...
This paper describes studies which have been carried out during the last two years, of various forms solifluct on in mount ins central Norway. The field-work has undertaken by expeditions with members from Cambridge and Oslo Universities.1 It supported Society, Norwegian Nansen Fund several other sources. investigations are planned to continue for some suggestions made latter part this con? cerning solifluction processes necessarily tentative. Solifluction, or downslope movement soil due...
A giant alteration system including approximately 200 km2 of rocks dominated by the secondary mineral assemblages lies near prominent lineament formed Cloncurry Fault in southeast Proterozoic Mt Isa Inlier. Alteration affected that had previously undergone sillimanite zone metamorphism under pressures at least 300 MPa. The main was produced postorogenic brittle transcurrent motion with limited displacement. It exploits older D1 faults and occupies different structural positions within F2...
Glycosidases of Muscat Alexandria were isolated and further purified. Two β-glucosidases, a β-galactosidase, two weak α-glucosidases found. The which located mainly in the juice grape, had increased activity with berry maturity. They both optimal at pH 5.0 relatively tolerant to 10% ethanol, but they inhibited by glucose. Chardonnay, Gewürztraminer, Hamburg, Thompson Seedless grape varieties β-glucosidase enzymes similar properties those Alexandria. β-glucosidases commercial pectolytic...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation and partial characterization of a natural haze protective factor from wineElizabeth J. Waters, William. Wallace, Max E. Tate, Patrick WilliamsCite this: Agric. Food Chem. 1993, 41, 5, 724–730Publication Date (Print):May 1, 1993Publication History Published online1 May 2002Published inissue 1 1993https://doi.org/10.1021/jf00029a009RIGHTS & PERMISSIONSArticle Views372Altmetric-Citations73LEARN ABOUT THESE METRICSArticle Views are the...
ABSTRACT Free volatiles, and those hydrolytically released from glycosidic forms, were analyzed for Sauvignon Blanc juices three successive vintages. Most of the 213 compounds identified in one bio‐genetic categories: norisoprenoids, benzene derivatives, monoterpenes or aliphatics. Several have not been previously reported as grape components. Monoterpenes lower concentration than normally found floral varieties, but at higher levels Chardonnay juices. A notable proportion (40–50%) bound...
Abstract The aroma properties of hydrolysed glycosidic precursors from Semillon, Sauvignon Blanc and Chardonnay grape juices were investigated in a neutral wine medium using sensory descriptive analysis. fractions by acid catalysis the presence or absence ethanol, glycosidase enzyme action, sequence treatments. Wines made Semillon also assessed. Sensory difference tests showed that samples each variety for treatment distinct, except hydrolysates prepared enzymically Chardonnay. hydrolysate...