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Revision as of 17:26, 9 December 2014 (edit) 62.210.167.213 (Talk) (Do you have any exams coming up? <a href=" http://www.backup-data.net/index.php/zenegra-50 ">zenegra 50 mg</a> In their study, Greenwalt and his collaborators bombarded the mosquito fossil with molec) ← Older edit		Latest revision as of 23:56, 14 October 2016 (edit) (undo) 188.143.232.26 (Talk) (gtOy7c http://www.FyLitCl7Pf7kjQdDUOLQOuaxTXbj5iNG.com)
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−	~~Do you have any exams coming up? <a href="~~ http://www.backup-data.net/index.php/zenegra-50 ">zenegra 50 mg</a> In their study, Greenwalt and his collaborators bombarded the mosquito fossil with molecules of bismuth, a heavy metal, which vaporizes chemicals found in the fossil. These airborne chemicals are then analyzed by a mass spectrometer, a machine that can identify chemicals based on their atomic weights, Greenwalt said. The beauty of this technique, called time-of-flight secondary ion mass spectrometry, is that it doesn't destroy the sample previously, similar techniques required grinding up portions of fossils, he added. The analysis revealed hidden porphyrins, organic compounds found in hemoglobin, the oxygen-carrying protein in blood, hidden in the fossilized mosquito's abdomen.	+	gtOy7c http://www.FyLitCl7Pf7kjQdDUOLQOuaxTXbj5iNG.com