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Characterization methods with regard to nanopowder flammability and explosivity are presented and illustrated for few nanopowders. Analytical models are developed in order to explain the dependency of the combustion times on the particle diameter. Experimental evidence shows that there exists, for carbonaceous and metallic materials, mainly two combustion(More)
Fifty patients allergic to mite were tested for D. pteronyssinus using two prick-test techniques; the classical method by Pepys and the Morrow-Brown needle. Each patient received six tests with each method on the two forearms. The evaluation of the weal areas was conducted in two ways: by weighing the shapes of the tests transferred on to paper, and by(More)