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Malolactic fermentation in wine - beyond deacidification

2002· review· en· W2049867177 on OpenAlexaboutno aff
S.-Q. Liu

Bibliographic record

VenueJournal of Applied Microbiology · 2002
Typereview
Languageen
FieldAgricultural and Biological Sciences
TopicFermentation and Sensory Analysis
Canadian institutionsnot available
Fundersnot available
KeywordsMalolactic fermentationOenococcus oeniPediococcusWineLeuconostocWine faultChemistryFermentationLactic acidFood scienceBiochemistryFermentation in winemakingHydrolysisLactobacillusBacteriaBiology

Abstract

fetched live from OpenAlex

1. Introduction, 589 2. Citrate fermentation, 589 3. Metabolism of carbohydrates, 590 3.1 Metabolism of mono‐ and disaccharides, 590 3.2 Metabolism of polysaccharides, 591 3.3 Metabolism of polyols, 591 4. Catabolism of aldehydes, 592 5. Hydrolysis of glycosides, 592 6. Degradation of phenolic acids, 593 7. Synthesis and hydrolysis of esters, 593 8. Lipolysis, 593 9. Proteolysis and peptidolysis, 593 10. Amino acid catabolism, 594 11. Sensory impact, 595 12. Health implications, 595 12.1 Formation of amines, 595 12.2 Formation of ethyl carbamate precursors, 595 12.3 Formation of glyoxal and methylglyoxal, 596 13. Conclusions, 596 14. References, 596 Malolactic fermentation (MLF) in wine is a secondary fermentation that usually occurs at the end of alcoholic fermentation by yeasts, although it sometimes occurs earlier. It is practically a biological process of wine deacidification in which the dicarboxylic L‐malic acid (malate) is converted to the monocarboxylic L‐lactic acid (lactate) and carbon dioxide (Davis et al. 1985). Deacidification is particularly desirable for high‐acid wine produced in cool‐climate regions, such as New Zealand and Canada. This process is normally carried out by lactic acid bacteria (LAB) isolated from wine, including Oenococcus oeni (formerly Leuconostoc oenos; Dicks et al. 1995), Lactobacillus spp. and Pediococcus spp. (Wibowo et al. 1985). Various technologies, such as bioreactors with high‐density cells and immobilized cells or enzymes, have been developed to facilitate wine deacidification (Maicas 2001). Oenococcus oeni is the preferred species used to conduct MLF due to its acid tolerance and flavour profile produced. In addition to its occurrence in wine, MLF occurs in other fermented beverages, such as cider (Carr 1987; Jarvis et al. 1995).

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: Not applicable · Consensus signal: none
GenreCandidate signal: Review · Consensus signal: Review
Teacher disagreement score0.004
Threshold uncertainty score0.012

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0010.001
Open science0.0000.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0040.002

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 head0.044
GPT teacher head0.274
Teacher spread0.230 · 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 designNot applicable
Domainnot available
GenreReview

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

Citations307
Published2002
Admission routes1
Has abstractyes

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