John Bertram Grey
Industrial Research Limited
22 Papers
375 Citations
John Bertram Grey is an academic researcher from Industrial Research Limited. The author has contributed to research in topics: Extraction (chemistry) & Supercritical carbon dioxide. The author has an hindex of 14, co-authored 22 publications. Previous affiliations of John Bertram Grey include Fonterra.
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Papers
Extraction of phenolics and essential oil from dried sage (Salvia officinalis) using ethanol–water mixtures
Nicola Emma Durling,Owen J. Catchpole,John Bertram Grey,Rosemary F. Webby,Kevin A. Mitchell,L. Yeap Foo,Nigel B. Perry +6 more
TL;DR: In this paper, the effects of particle size, temperature, contact time, solvent-to-sage ratio and the ethanol-water ratio on the extraction of the active compounds rosmarinic acid, carnosic compounds and essential oil from dried sage (Salvia officinalis) were studied.
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Supercritical antisolvent fractionation of propolis tincture
TL;DR: In this paper, a supercritical antisolvent/extraction process was developed for the fractionation of propolis tincture to obtain flavonoids and essential oil fractions by extraction, and remove high molecular mass components by antiscale precipitation.
100
Extraction of Chili, Black Pepper, and Ginger with Near-Critical CO2, Propane, and Dimethyl Ether: Analysis of the Extracts by Quantitative Nuclear Magnetic Resonance
Owen J. Catchpole,John Bertram Grey,Nigel B. Perry,Elaine J. Burgess,Wayne A. Redmond,Noel G. Porter +5 more
TL;DR: Ginger, black pepper, and chili powder were extracted using near-critical carbon dioxide, propane, and dimethyl ether on a laboratory scale to determine the overall yield and extraction efficiency for selected pungent components.
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Near-critical extraction of sage, celery, and coriander seed
TL;DR: In this paper, the authors performed near-critical extraction of coriander seed, Dalmatian sage, and celery using liquid carbon dioxide to obtain oleoresins.
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Measurement and modelling of the ternary phase equilibria for high pressure carbon dioxide-ethanol-water mixtures
TL;DR: In this article, a continuous flow apparatus for measuring the phase equilibria of liquids in CO2 is presented, and the phase behavior of the ternary CO2-EtOH-H2O system was predicted more accurately with the Wong-Sandler mixing rules than with the quadratic mixing rules.
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