Search

Search results

Displaying 21 - 30

tautomer

(Encyclopedia) tautomertautomertôˈtəmər [key], one of two or more structural isomers that exist in equilibrium and are readily converted from one isomeric form to another. Of the various types of…

Korchnoi, Viktor Lvovich

(Encyclopedia) Korchnoi, Viktor LvovichKorchnoi, Viktor Lvovichvyēkˈtər ləvôvˈyĭch kôrchˈnoi [key], 1931–2016, Russian-Swiss chess master. A long-time leading Soviet player, he lost to Anatoly Karpov…

Mülheim an der Ruhr

(Encyclopedia) Mülheim an der RuhrMülheim an der Ruhrmülˈhīm än dĕr r&oomacr;r [key] or Mülheim, city (1994 pop. 177,175), North Rhine–Westphalia, W Germany, on the Ruhr River. It is an…

purine

(Encyclopedia) CE5 Purines found in deoxyribonucleic acid (DNA) purine, type of organic base found in the nucleotides and nucleic acids of plant and animal tissue. The German chemist Emil Fischer…

Sirk, Douglas

(Encyclopedia) Sirk, Douglas, 1900–87, German-American film director, b. Hamburg as Claus Detlef Sierck. A successful director in German theater and film, he fled the Nazi regime in 1937. Two years…

Kramnik, Vladimir

(Encyclopedia) Kramnik, Vladimir, 1975–, Russian chess player, b. Tuapse. Kramnik started to play chess at the age of four, and at eleven began studying with both Mikhail Botvinnik and Garry Kasparov…

First Kids Slideshow

by Mark Hughes The American public has always been fascinated by first families. We know much about the lives of the presidents and first ladies, but what about the children in the White House?…

Koetsu Hon'ami

(Encyclopedia) Koetsu Hon'amiKoetsu Hon'amikōˈĕts&oomacr;ˌ hônäˈmē [key], 1558–1637, Japanese artist, poet, calligrapher, tea master, and landscape gardener. Considered one of the greatest and…

Karpov, Anatoly

(Encyclopedia) Karpov, AnatolyKarpov, Anatolyənətôlˈyē kärˈpôf [key], 1951–, Russian chess master. In 1970 he became the world's youngest international grand master. Karpov won (1975) the world…