| http://www.w3.org/ns/prov#value | - The abbreviation P10 is used to denote the ratio of OTR at a first temperature T1??? C. (OTR1) to OTR at a second temperature T2??? C. (OTR2), where T2 is (T1???10)??? C., T1 being a temperature in the range 10-25??? C.; or, when T2 is a temperature which is not (T1???10)??? C., but is a temperature lower than T1, to denote the ratio P 10 = exp ??? [ 10 T 1 - T 2 ??? ln ??? ??? ( OTR 1 OTR 2 ) ] T
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