as he researched on any other things?
Yes, he researched "Classical Physiology".
Severo Ochoa
During his 1930 visit the laboratory work was "classical physiology," which Ochoa described as "one could see muscles twitching everywhere". 
what nitrogenous bases are found in a molecule of rna (ribonucleic acid) UNANSWERABLE when was this acid first found? 1959 and by whom? Severo Ochoa
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Severo Ochoa [SEP] Career and research
Ochoa left Spain and returned to Meyerhof's Kaiser Wilhelm Institute for Biology now relocated in Heidelberg, where Ochoa found a profoundly changed research focus. During his 1930 visit the laboratory work was "classical physiology," which Ochoa described as "one could see muscles twitching everywhere". By 1936 Meyerhof's laboratory had become one of the world's foremost biochemical facilities focused on processes such as glycolysis and fermentation. Rather than studying muscles "twitch," the lab was now purifying and characterizing the enzymes involved in muscle action but were involved in yeast fermentation. From then until 1938, he held many positions and worked with many people at many places.