Subjectively, the first two are the most pungent, while the last two (sulfur-oxidized) give a sweet aroma. A mixture of these compounds form a "reconstituted asparagus urine" odor. This was first investigated in 1891 by Marceli Nencki , who attributed the smell to methanethiol .  These compounds originate in the asparagus as asparagusic acid and its derivatives, as these are the only sulfur-containing compounds unique to asparagus. As these are more present in young asparagus, this accords with the observation that the smell is more pronounced after eating young asparagus. The biological mechanism for the production of these compounds is less clear. [ citation needed ]
Haiku poet Madoka Mayuzumi delivered a special lecture at the Fifteenth Symposium on Japanese Language Education in Europe , held in late August 2010 at the University of Bucharest in Romania. Mayuzumi, appointed by Jap an’s Agency of Cultural Affairs as a special advisor for cultural exchange, was invited to speak by the Tokyo Foundation, which provided assistance for the symposium and which has also been supporting Japanese language education at the University of Bucharest for many years through the Nippon Foundation Fund for Japanese Language Education Program .
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