Perrin rule

PERRIN RULE. Ions of charge opposite to that of a diaphragm have by far the greatest effect on endosmosis, The higher their valence (or opposite sign) the greater the reduction of electroosmotic flow. 

C. L. Perrin, "The Woodward-Hoffman Rules—An Elementary Approach," Chemistry in Britain 8, 163 (1972). 

The public fury forced HMOs to ease up on their rules. Moreover, in the booming economy of the 1990s, companies actually embellished their plans, rather than cutting back, in order to keep and attract prized staffers. When they re competing for employees, our employers are very sensitive. No one really wants to be the outlier, notes Barbara Hawes, a consultant at the consulting firm Towers Perrin. 

Sivakumaran S (2012a) The ownership of international humanitarian law non-state armed groups and the formation of enforcement of IHL rules. In Perrin B (ed) Modem warfare armed groups, private mihtaries, humanitarian organisations, and the law. UBC Press,... 

The bonding properties, or valence bonds, are 1, 2, 3, 4 respectively, hence the HONC rule (Perrine 1996) ... 

The hydrogen and hydroxide ions are especially effective in determining the nature of the charge. Hardy t found that albumin had no perceptible charge in pure water, but that traces of alkalies or acids caused the albumin to go to the anode or to the cathode respectively. Perrin t found the same rule to hold for many suspended powders, and many hydrosols, such as albumin solutions. Pauli corroborated Perrin s results on proteids. 

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