Ámbar: una gema de interés comercial, histórico y químico
Bibliographic record
Abstract
El ambar es un material antiguo que ha sido utilizado en joyeria desde civilizaciones antiguas. Ademas, el ambar ha demostrado ser un medio de preservacion de especies extintas que vivieron hace millones de anos como insectos, aracnidos y reptiles. El ambar es una resina fosilizada que esta formada de una mezcla compleja de compuestos organicos llamados terpenos y que originalmente eran parte de una resina exudada por arboles hace millones de anos. El ambar procedente de arboles de la familia de la conifera presenta como caracteristica un contenido apreciable de acido succinico como el caso del ambar de Rusia (ambar baltico), Alemania y Canada. Sin embargo, el ambar procedente de la familia de las leguminosas como por ejemplo el ambar de Mexico y Republica dominicana no contienen acido succinico. Actualmente muchos de los terpenos encontrados en el ambar se pueden encontrar como productos naturales de la familia de las coniferas y algunos de estos compuestos han sido utilizados en la sintesis de monomeros y polimeros.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.024 | 0.006 |
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".