RESUMO
Photoexcitation of complexes between cyclophane 1 and 1- or 2-chloronaphthalene in aqueous solution leads to rapid dechlorination of the guest, a reaction driven by electron transfer from host to excited guest. The main photoproducts contain a naphthyl group covalently attached to the host framework. The results may lead to new approaches for remediating water contaminated with chlorinated aromatic compounds.
Assuntos
Cloro/química , Éteres Cíclicos/efeitos da radiação , Naftalenos/efeitos da radiação , Fotólise/efeitos da radiação , Piperidinas/efeitos da radiação , Éteres Cíclicos/química , Espectrometria de Massas , Conformação Molecular/efeitos da radiação , Naftalenos/química , Fotoquímica/métodos , Piperidinas/química , Água/químicaRESUMO
It has been well established that some of the major risk factors for coronary heart disease are related to lifestyle, that is, behaviors that are potentially modifiable. Although studies have identified psychosocial stress as a factor associated with elevated cholesterol levels in adults, this relationship has not been thoroughly examined in adolescents. The present study investigated the relationship between daily life events and total cholesterol levels among 104 high school students. The contributions of health-related behaviors, such as dietary patterns, physical activity, smoking, and television viewing, were also examined. Hierarchical multiple regression analyses showed that scores on a scale of daily life events explained a significant portion of the variance in cholesterol measurements. However, when the sample was stratified by gender, this effect remained significant for adolescent females but not males. Overall, females reported a greater degree of negative health behaviors than did males. Implications of these findings are discussed.
