| http://www.w3.org/ns/prov#value | - However, viral recoveries from various types of water are not always similar due to the fact that adsorption of viruses to the charged membranes may be influenced by salts, multivalent cations or acid conditions (Haramoto et al. 2005, 2006, 2007, Hsu et al. 2007, Victoria et al. 2009).
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