Alteration of Protein Constituents Induced by Low-Energy (<40 eV) Electrons. III. The Aliphatic Amino Acids
Bibliographic record
Abstract
We report mass spectrometric measurements of anions desorbed by 1−40 eV electron impact on thin films of glycine (Gly), alanine (Ala) and cysteine (Cys) physisorbed on a Pt substrate. (H -, CH -, CH 2 -, CH 3 -, O -, OH -, and CN - ), (H -, CH 2 -, CH 3 -, O -, and OH - ), and (H -, O -, OH -, and CN -, S -, and SH - ) anions are observed to desorb from these irradiated molecular solids, respectively. The anion yield functions exhibit structures at energies below 15 eV, indicating that molecular dissociation operates via dissociative electron attachment (DEA). Above 15 eV, anion desorption is dominated principally by nonresonant dipolar dissociation (DD). However, an additional structure observed at 20 eV in the yield function of H - denotes the presence of a resonant process: DEA or decay of a transient molecular anion into the DD continuum or both. The presence of the sulfur group in cysteine enhances dissociation by 2 orders of magnitude relative to Gly and Ala.
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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".