Plaguicidas organoclorados (DDT): implicaciones por su uso
Pourquoi ce travail est dans la base
Une base qui oublie comment elle a trouvé un travail ne peut pas être vérifiée. Voici les voies qui ont admis celui-ci.
Notice bibliographique
Résumé
By many years, DDT was the pesticide for excellence to fight plagues and vectors of diseases. Nevertheless, after a series of attacks nonscientists based on the book Silence Spring, DDT was prohibited by the EPA in 1972. However, new discoveries put in judgment the validity of such attacks. The objective of this study was to review the results and methodologies of diverse studies about the relation between the DDT exposure and the incidence of certain types of cancers, which establish conclusions on such matter. Several cancer were investigated: pancreas, no Hodgkin lymphoma (NHL), endometrial and breast. With regard to cancer of pancreas, it has little-known and unidentified factors of risk. Studies carried out in 1987 and 1998, showed incongruities, since while one associated the exhibition to the pesticide with the development of cancer, the other demonstrated that some correlation between the exposure and the development did not exist. NHL originated an abnormal reproduction of the cells of the lymphatic system, which produces, with time, the growth and development of tumors and one of its main characteristics is the failure of the mechanisms that produce apoptosis. The relation between this disease and the exposure to DDT has demonstrated certain tendency; in four studies made in USA and Canada, the risk probabilities were 2.0, 2.0, 1.8 and 1.7 respectively. On the other hand, on the basis of the theory that certain types of cancer in humans come from the endocrines effects of the environmental polluting agents, diverse studies have been made to determine, the relation between the cancer of endometrial, breast and the hormonal effects that produce the metabolites of the DDT or this compound. A study in Sweden, demonstrated that, although the DDE was in greater average concentration in serum than other pesticides (600 - 700 ng/g of lipid fraction), not significant differences in the risk of exposure were found. Based on these analyzed data, there was not any association between the risk in the appearance of endometrial cancer and the serum organochlorine compounds levels. For the breast cancer, this knowledge is lower since the risk factors only explain less then 50 percent of the cases. The only study that has demonstrated to an association between the hormonal effects of the DDE and the probability of developing cancer was developed in 1993, but since then, at least 30 studies have documented that a clearly significant relation do not exist.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,012 | 0,012 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle