Influence of Dextran on the Phase Behavior of Suspensions of Cellulose Nanocrystals
Bibliographic record
Abstract
Acid hydrolysis of cellulose fibers produces suspensions of colloidal cellulose nanocrystals. At low concentrations these suspensions are isotropic, while at high concentrations the cellulose rods spontaneously organize into a chiral nematic liquid crystal phase. We have studied the effect of adding high molecular weight dextran to various concentrations of these cellulose suspensions. Adding dextran to an isotropic suspension caused no demixing of the two components. When dextran was added to a biphasic sample, it preferentially partitioned into the isotropic phase. Adding dextran to a completely anisotropic phase caused a phase separation into a dextran-rich isotropic phase and a dextran-poor anisotropic phase. The incorporation of dextran in the chiral nematic phase caused a marked increase in defects in the liquid crystalline texture.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
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".