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| | Lazzaro Spallanzani (www.whonamedit.com) |
 | | Spallanzani was born in Scandiano, a small town in the province of Emilia, northeast of the Apennines, to Gianniccolò, a distinguished lawyer, and Lucia Zigliani. |
 | | Spallanzani concluded that it was the solid parts of the secretion, proteinaceous and fatty substances that form the bulk of the semen, that were essential, and he continued to regard the spermatozoa as inessential parasites. |
 | | Spallanzani, a believer in preformation theory, found that he could prevent contamination by microorganisms in strongly heated infusions protected from aerial contamination, but he observed that as soon as air was allowed to enter the flask, microorganisms proliferated. |
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