[en] Deuterium has been incorporated into palladium crystals by electrochemical methods to analyze possible cold fusion events. Various palladium samples with masses between 1 and 100 g and different surface area have been used. They were loaded with D up to a concentration of PdD_0.7. During electrolysis the rate of heat flow, deuterium and oxygen gas flow and neutron production was measured. After electrolysis the helium content of the samples and the tritium content of the electrolyte were analyzed. Deuterium has also been incorporated into titanium from the gas phase to generate TiD₂. In cooling and heating runs the rate of release of fast neutrons was measured to detect possible fusion events. (orig./RB)