A novel filtration system for polyethylene glycol solutions used in the osmotic method of controlling suction
Bibliographic record
Abstract
One of the problems encountered when using the osmotic technique of controlling suction is related to the possible crossing of polyethylene glycol (PEG) molecules through the semipermeable membrane. Of the various hypotheses proposed, the paper considers the hypothesis that the PEG solutions are not pure enough and have molecules that are small enough to cross the semipermeable membrane. The paper presents a novel PEG purification system in which two solutions at different concentrations are put in contact through a semipermeable membrane along a large exchange surface. A peculiarity of the system is that it creates two opposite fluxes through the membrane, where small PEG molecules go from the higher concentration solution towards the lower concentration solution, and water migrates in the opposite direction. It has been observed that a small quantity of small molecules of PEG 6000 crossed the molecular weight cutoff (MWCO) 3500 semipermeable membrane.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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".