Fabrication and Characterization of Hydroxyapatite Water Purification Filter with Continuous Pore Structure Using Polysaccharide as Pore-forming Agent
Bibliographic record
Abstract
Securing safe water remains an important global issue. PoU (Point of Use) water purification technology using filter media is promising for treating contaminated water in areas where infrastructure development is difficult. In this study, fabrication of a porous hydroxyapatite (HAp) bulk body with a connected pore structure was attempted as a filter that has the function of purifying water contaminated with microorganisms. HAp exhibits high adsorption properties for various substances such as proteins, bacteria, and viruses. In order to introduce a continuous pore structure into the porous body, corn starch, a polysaccharide, was used as a pore-forming agent. Three-dimensional observation of the internal structure of the porous body using a confocal laser fluorescent microscope and liquid immersion technique revealed a shell-like pore structure derived from the starch and the continuous pore structure inside the porous material. A filtration test of a buffer solution containing Escherichia coli (E. coli) was conducted and the filtrate did not contain detectable concentrations of E. coli. A high virus removal rate was demonstrated in a filtration test of a buffer solution containing human coronavirus. It was demonstrated that hydroxyapatite porous materials have excellent properties for filter applications to purify water contaminated with bacteria and viruses.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot 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.
Codex and Gemma teacher scores by category
| 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 | 0.000 | 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) | 0.000 | 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 teacher head, 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".