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Main Author:	Sara del Río Paredes
Format:	Artículo científico
Language:	es
Published:	Ministerio de Sanidad 2005
Subjects:	Salud Infancia Embarazo Peligros tóxicos Riesgos químicos Sustancias químicas
Online Access:	https://www.redalyc.org/articulo.oa?id=17079211
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Contaminación química en la infancia: bioacumulación y efectos potenciales Sara del Río Paredes Salud Infancia Embarazo Peligros tóxicos Riesgos químicos Sustancias químicas En 2003 Greenpeace demostró la presencia de contaminantesquímicos persistentes y bioacumulativos en muestras de polvo recogidasen hogares europeos. Otras investigaciones de Greenpeacerevelaron que se pueden encontrar estas mismas sustancias enmuchos productos de consumo cotidiano. Este informe cierra el ciclopresentando dos realidades inquietantes. La primera que muchas delas sustancias químicas encontradas en productos de consumo y en elpolvo doméstico también están en el cuerpo humano, incluyendo alos nonatos y a los recién nacidos. La segunda que es probable queestos productos químicos tengan un efecto perjudicial en la saludhumana, particularmente en la infantil.El informe Legado Químico, de la Dra Catherine N Dorey, aúnalas pruebas que ilustran cómo y por qué la infancia corre un especialriesgo ante los contaminantes químicos. Las pruebas presentadas poracadémicos, gobiernos e instituciones internacionales, no son fácilesde desestimar, ya que todas hacen una contribución específica al crecientebanco de investigación internacional que refuerza la conclusión de este informe: la actual legislación no protege a la infancia del«ataque» químico que comienza desde el mismo momento de la concepción.El estudio se centra en siete productos químicos clave: los alquilfenoles,el bisfenol A, los pirorretardantes bromados, los compuestosorganoestánnicos, los ftalatos, las parafinas cloradas y los almizclessintéticos; y demuestra la presencia de estas sustancias en los niños yniñas, el incremento de exposición de este grupo y el consecuenteaumento de los posibles impactos en la salud, qué enfermedadesestán relacionadas con la exposición química y los impactos especí-ficos sobre la salud de los siete productos analizados. 2005 artículo científico 1135-5727 https://www.redalyc.org/articulo.oa?id=17079211 es http://www.redalyc.org/revista.oa?id=170 Revista Española de Salud Pública application/pdf Ministerio de Sanidad Revista Española de Salud Pública (España) Num.2 Vol.79

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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