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Permanent link (DOI): https://doi.org/10.7939/R3JH3DD2F

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Subcritical water extraction of bio-molecules from lentil biomass Open Access

Descriptions

Other title
Subject/Keyword
lactose
lentil
solubility
carbohydrates
glucose
phenolics
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Haldar, Anupam
Supervisor and department
Saldana, Marleny D. Aranda (Agricultural, Food and Nutritional Science)
Examining committee member and department
Vasanthan, Thavar (Agricultural, Food and Nutritional Science)
Guigard, Selma E. (Civil & Environmental Engineering)
Department
Department of Agricultural, Food, and Nutritional Science
Specialization
Food Science and Technology
Date accepted
2013-07-11T13:30:08Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
Solubility of glucose and lactose in subcritical water (SCW) was first determined at different pressures and temperatures. Sugar solubility increased with temperature but decreased with an increase in pressure. Then, carbohydrates and phenolics were extracted from lentil husk and cotyledon using SCW. Effect of temperature (120-180°C), pressure (15-120 bar), flow rate (2-5 mL/min), pH (4-10) and ethanol content (0-80%, v/v) in pressurized ethanol+water mixtures were evaluated. For lentil husk, the optimum yield of carbohydrates (60.54±1.32 g/100 g husk), pentosans (18.26±1.47 g/100 g husk) and phenolics (4.78±0.15 g/100 g husk) were obtained at 200°C, pH of 4, 22.8% ethanol (v/v) and 65 bar. For lentil cotyledon, the optimum yield of carbohydrates (61.66±0.72 g/100 g cotyledon) and phenolics (2.05±0.06 g/100 g cotyledon) were obtained at 172.9°C, 80.2 bar and pH of 6.2. The findings demonstrate that SCW extraction is a potential alternative to conventional extraction to obtain carbohydrates and phenolics from lentil.
Language
English
DOI
doi:10.7939/R3JH3DD2F
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Saldaña 2012. J. Chem. Thermodynamics 55:115–123

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