Hydroxyl Radical (ºOH) Scavenger Power of Tris (hydroxymethyl) Compared to Phosphate Buffer
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Bibliographic record
Abstract
Tris and phosphate buffer are regularly used in experimental investigations. These buffers might have radical scavenger properties toward different kinds of Reactive Oxygen Species (ROS) produced in solutions during chemical reactions like Fenton reaction and gamma radiolysis. Hydroxyl radicals (ºOH) are the most reactive and oxidizing agents having a great potential in oxidization of macromolecules like DNA and proteins. This <em>in vitro</em> study was aimed to evaluate radio-protective effects of Tris and phosphate buffer toward hydroxyl radicals generated by Fenton reaction. Hence, ºOH radicals were produced using a mixture of Hydrogen Peroxideand Ferrous Sulfate, called Fenton system. Human serum albumin (500µM) was prepared in Tris (10mM) and phosphate buffer (10mM), separately. These two samples were incubated with Fenton reaction (Ferrous Sulfate + Hydrogen peroxide) (10 mM) for 30 minutes and carbonyl groups were quantified by spectrophotometric carbonylation assay. The results of this study revealed the values of 1.04 ± 0.02 and 1.73 ± 0.03 for Tris and phosphate buffer treated samples, respectively. In conclusion, these findings confirmed that Tris buffer is a stronger radical scavenger toward ºOH radicals<strong> </strong>than phosphate buffer.<strong> </strong>
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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 | 0.002 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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 it