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Paper chemistry

2009· article· en· W2332693820 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueNordic Pulp & Paper Research Journal · 2009
Typearticle
Languageen
FieldChemical Engineering
TopicChemical Safety and Risk Management
Canadian institutionsMcGill University
Fundersnot available
KeywordsIndustrial chemistryPolymer scienceChemistryBiochemical engineeringEngineering

Abstract

fetched live from OpenAlex

The wet web strength of handsheets containing PCC (precipitated calcium carbonate) fillers with different particle sizes was evaluated for various concentrations of PCC. Also the friction between wet sheets containing PCC was evaluated in the range 30-55% solids content. It was found that incorporating PCC in the sheet using cPAM (cationic polyacry-lamide) as a retention aid leads to the formation of large PCC aggregates, which have a negative impact on wet web strength. On the other hand, incorporating PCC in sheets using PEI (polyethylene imine) as a retention aid, leads to a decrease in PCC size and the wet web strength is found to be very close to that of sheets without PCC. It is suggested that PCC particles or small aggregates deposited on fibers can increase the friction between fibers, thus increasing the entanglement friction and the wet web strength, whereas large PCC aggregates, which due to their large size can easily detach from fibers, interfere with fiber entanglements during the consolidation of the sheet, resulting in lower strength. The increase in friction was confirmed by measurements of the friction force between two wet sheets. In the regime where capillary forces are absent, depositing PCC particles or aggregates on top of a wet sheet increases the friction between sheets. It was also found that the addition of microfibrils to the PCC-filled handsheets increases the wet web strength, likely because of mechanical entanglements caused by the microfibrils.

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.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.001
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesResearch integrity, Insufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.893
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0010.000
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 science0.0010.000
Research integrity0.0000.002
Insufficient payload (model declined to judge)0.0070.000

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 head0.029
GPT teacher head0.326
Teacher spread0.298 · 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