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Spectroscopic and thermal characterization in poly(p-phenylene vinylene)/sol-gel silica sample
(Elsevier B.V., 2003-12-01)
The absorption and luminescence spectra for the poly(p-phenylene vinylene)/sol-gel silica with different thermal treatments were measured. A considerable increase in the luminescence was observed for the polymer introduced ...
Incidence of recreational techniques to reduce attrition and improve learning English as a second language on students of elementary and pre-intermediate levels at Lincoln College of foreign languages Institute during april july 2008
(QUITO / ESPE-IDIOMAS / 2008, 2008-04)
To do this research, I have followed a scheme proposed by The Army Polytechnic School Language Department which clearly specifies step by step each detail of how to develop a research and obtain the requirement results ...