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Dettagli Bibliografici
Autore principale:	Rodrigo L. Tomassini
Natura:	Artículo científico
Lingua:	es
Pubblicazione:	Universidad Nacional Autónoma de México 2015
Soggetti:	Ciencias de la Tierra Tafonomía Argentina Cuaternario megamamíferos fosildiagénesis
Accesso online:	https://www.redalyc.org/articulo.oa?id=57240685008
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Modificaciones fosildiagenéticas en Toxodon platensis Owen, 1837 (Notoungulata, Toxodontidae) del Pleistoceno Tardío de la provincia de Corrientes, Argentina Rodrigo L. Tomassini Ángel R. Miño-Boilini Alfredo E. Zurita Claudia I. Montalvo Nora Cesaretti Ciencias de la Tierra Tafonomía Argentina Cuaternario megamamíferos fosildiagénesis Se analizaron las características fosildiagenéticas, incluyendoaspectos mineralógicos, geoquímicos y paleohistológicos, presentesen costillas de Toxodon platensis Owen (Mammalia, Notoungulata,Toxodontidae). Los restos analizados provienen de los depósitos dellanura de inundación de la Formación Toropí/Yupoí asignados alPleistoceno Tardío, aflorantes en la provincia de Corrientes (RegiónMesopotámica, Argentina). Los componentes minerales principales delas costillas incluyen hidroxiapatita y dahllita. El color negro reconocidoen algunos ejemplares está relacionado a impregnaciones debido a laprecipitación de óxidos de hierro. La microestructura ósea evidenciaun grado de preservación bueno, aunque en todos los ejemplares sereconoció el desarrollo de numerosas microgrietas radiales asociadasa las osteonas secundarias. Los óxidos de hierro rellenan la mayoríade las cavidades correspondientes a los elementos microestructurales(canales de Havers y Volkmann, lagunas de osteocitos y canalículos) ylas microgrietas radiales, y también generaron reemplazos en distintossectores de la matriz ósea. La información obtenida permite inferirque las historias tafonómicas de los materiales analizados tienen unaestrecha relación con las características del ambiente de preservación. 2015 artículo científico 1026-8774 https://www.redalyc.org/articulo.oa?id=57240685008 es http://www.redalyc.org/revista.oa?id=572 Revista Mexicana de Ciencias Geológicas application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Ciencias Geológicas (México) Num.2 Vol.32

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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