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The q-value can be interpreted as the false discovery rate (FDR): the proportion of false positives among all positive results. Given a set of test statistics and their associated q-values, rejecting the null hypothesis for all tests whose q-value is less than or equal to some threshold ensures that the expected value of the false discovery rate is .
The most common dangerous goods are assigned a UN number, a four digit code which identifies it internationally. Less common substances are transported under generic codes such as "UN1993: flammable liquid, not otherwise specified". The UN Recommendations do not cover the manufacturing, use or disposal of dangerous goods.
Under the UN Dangerous Goods classification, explosive hazard Divisions are awarded using the UN Manual of Criteria and Tests, by following the process flow chart '10.3 Procedure for assignment to a division of the class of explosives' and conducting the appropriate tests either UN series 5, series 6, or series 7 tests. [3]
Proper Shipping Name UN 2201: 2: Nitrous oxide, refrigerated liquid: UN 2202: 2: Hydrogen selenide, anhydrous: ... UN Dangerous Goods List from 2013, cited on 7 May 2015.
n.o.s. = not otherwise specified meaning a collective entry to which substances, mixtures, solutions or articles may be assigned if a) they are not mentioned by name in 3.2 Dangerous Goods List AND b) they exhibit chemical, physical and/or dangerous properties corresponding to the Class, classification code, packing group and the name and description of the n.o.s. entry [2]
The value relates to the enthalpy of a chemical reaction or the energy of radioactive decay products. It can be determined from the masses of reactants and products. Q values affect reaction rates. In general, the larger the positive Q value for the reaction, the faster the reaction proceeds, and the more likely the reaction is to "favor" the ...