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Record W3194701516 · doi:10.53591/iti.v4i4.107

Determinación de metales pesados (cd y pb) en moluscos bivalvos de interés comercial (anudara tuberculosa y a. Grandes) de puerto el morro, Ecuador

2021· article· es· W3194701516 on OpenAlexaboutno aff
Mariuxi Mero, Víctor Arcos, Fidel Egas, Rubén Siavichay, Gino Lindao

Bibliographic record

VenueInvestigación Tecnología e Innovación · 2021
Typearticle
Languagees
FieldEnvironmental Science
TopicHeavy metals in environment
Canadian institutionsnot available
Fundersnot available
KeywordsHeavy metalsHumanitiesAquatic environmentGeographyChemistryEnvironmental chemistryBiologyEcologyPhilosophy

Abstract

fetched live from OpenAlex

La presencia de metales pesados en concentraciones que exceden los límites permitidos por las legislaciones ambientales nacionales e internacionales, alteran el equilibrio de un ecosistema y aunque hay una liberación de los metales pesados por medios naturales, la mayor parte es causada por acciones antropogénicas. Esta investigación determinó las concentraciones de cadmio y plomo en dos especies de moluscos de importancia comercial: concha prieta (Anadara tuberculosa) y pata de mula (A. grandis) y en muestras de agua y sedimento del hábitat circundante de estos organismos. Los resultados revelaron que a concentración de cadmio y plomo en agua en las estaciones 4, 5 y 6 exceden los valores descritos en a legislación ambiental ecuatoriana y en sedimento la presencia de cadmio es más notable debido a que exceden los valores de la Canadian Sediment Quality Guidelines for the Protection of Aquatic Life cuyo valor es de 0.676 ppm y el valor promedio cuantificado en esta investigación fue de 6.92 ppm. En Ecuador no existen normas sanitarias que establezcan límites de contenido de metales en moluscos bivalvos, sin embargo en un estudio de la USAID (2009) se encontraron concentraciones inferiores a 0.1 ppm para cadmio y 0.9 ppm para plomo, mientras que en el presente trabajo se encontraron en promedio 4.24 y 4.01 ppm de cadmio y 3.3 7 y 2.62 ppm de plomo para A. tuberculosa y A. grandis respectivamente, lo que evidencia una alta concentración de estos elementos tóxicos en los organismos objetos de estudio.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: Observational
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.067
Threshold uncertainty score0.133

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0000.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

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.

Opus teacher head0.015
GPT teacher head0.283
Teacher spread0.268 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

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".

Quick stats

Citations1
Published2021
Admission routes1
Has abstractyes

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