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Record W2901717004 · doi:10.22215/etd/2014-10304

Extraction, Bioactivity, and Stability of Wheat Bran Alkylresorcinols

2014· dissertation· en· W2901717004 on OpenAlexafffund
Aynur Gunenc

Bibliographic record

Venuenot available
Typedissertation
Languageen
FieldNursing
TopicFood composition and properties
Canadian institutionsUniversity of GuelphCarleton University
FundersMinistry of Agriculture, Food and Rural AffairsOntario Ministry of Agriculture, Food and Rural AffairsUniversity of Ottawa
KeywordsBranFood scienceDPPHExtraction (chemistry)ChemistryCultivarPrebioticAntioxidantWhole grainsComposition (language)Lactic acidBacteriaHorticultureBiologyBiochemistryChromatographyRaw material

Abstract

fetched live from OpenAlex

Whole grain intake may be linked to a lowered risk of chronic diseases and such positive effects might be attributed to phenolic lipids, alkylresorcinols (ARs), found in cereal bran.This study aimed to characterize ARs in wheat bran (WB), investigate the influence of environmental factors on AR composition, measure AR bioactivity including antioxidant activity (AA) and investigate AR stability during baking.Moreover, the prebiotic potential of WB-soluble dietary fibre (SDF) was explored using yogurt models.Specific objectives were achieved by the following projects.The effects of cultivar, and region on the ARs content in 24 wheat cultivars grown in Ontario were studied, by GC-MS and their AA were evaluated.TPC (3.0 to 58.0 mg FAE/g), DPPH (5 to 68%), ORAC (6.0 to 94.0 µmol TE/g) and ARs (21.0 to 1522.0 μg/g) of WB extracts were significantly affected by location and cultivar (P < 0.05).The stability of WB-ARs was studied using different bread formulations.Bread ARs (1.1 to 82.9 mg/100 g) were heat stable during baking at 255 °C for 12 min.A positive correlation was observed between TPC and ORAC (R 2 = 0.90).Two extraction methods were used to compare the AR contents of WB.The % ARs per extract using acetone versus SC-CO 2 extraction of both WB samples studied were in the range of 10.9% -15.6% and 5.1% -6.6%, respectively.The prebiotic potential of WB-SDF to enhance lactic acid bacteria (LAB) survival in yogurt models was explored.Total DF (53%) was counted as a sum of SDF (6%) and IDF (47%).HPLC analysis of DF fractions treated with alkaline hydrolysis showed that IDF (84.2%) had a higher phenolic acid (PA) content than SDF (15.8%).There was a significant difference in total bacterial count (9.1 log CFU/mL), pH (4.8) and TTA iii (1.4%) in yogurt samples containing 4% WB compared to controls during the four week cold storage period (4 °C).These results could lead to practical applications of WB-ARs and SDF in the functional foods and nutraceutical industry.Furthermore, increased WB utilization will reduce Agri-Food leftovers, thus improving environmental sustainability.honored to be her first graduate student in her academic career in 2009.From the day I met her, she has always been encouraging, enthusiastic, and hardworking about her research.Her passion for science, teaching and research

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.002
Threshold uncertainty score0.004

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.026
GPT teacher head0.288
Teacher spread0.263 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designBench or experimental
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2014
Admission routes2
Has abstractyes

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