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Tiselius, Arne

(Encyclopedia)Tiselius, Arne ärˈnə tēsāˈlyəs [key], 1902–71, Swedish biochemist. He received the 1948 Nobel Prize in Chemistry for developing new methods of separating and detecting colloids. One system (e...

desert

(Encyclopedia)desert, arid region, usually partly covered by sand, having scanty vegetation or sometimes almost none, and capable of supporting only a limited and specially adapted animal population. The so-called ...

stem cells

(Encyclopedia)stem cells, unspecialized human or animal cells that can produce mature specialized body cells and at the same time replicate themselves. Embryonic stem cells are derived from a blastocyst (the blastu...

napalm

(Encyclopedia)napalm nāˈpäm [key], incendiary material developed during World War II by Harvard scientists cooperating with the U.S. army and used in bombs and flame throwers. Napalm is based on a mixture of gas...

cofferdam

(Encyclopedia)cofferdam, temporary barrier for excluding water from an area that is normally submerged. Made commonly of wood, steel, or concrete sheet piling (see pile), cofferdams are used in constructing the fou...

Otto, Frei Paul

(Encyclopedia)Otto, Frei Paul ôˈtō [key], 1925–2015, German architect. Most notable for his tensile and pneumatic structures, Otto was among the first major architects to experiment with lightweight design. H...

body temperature

(Encyclopedia)body temperature, internal temperature of a living organism. Mammals and birds are termed warm-blooded, or homeothermic, i.e., they are able to maintain a relatively constant inner body temperature, w...

Medusa, in Greek mythology

(Encyclopedia)Medusa mədo͞oˈsə [key], in Greek mythology, most famous of the three monstrous Gorgon sisters. She was once a beautiful woman, but she offended Athena, who changed her hair into snakes and made he...

Henle, Jacob

(Encyclopedia)Henle, Jacob (Friedrich Gustav Jakob Henle) frēˈdrĭkh go͝osˈtäf yäˈkôp hĕnˈlə [key], 1809–85, German anatomist and histologist. A pupil of J. P. Müller, he taught at Zürich, Heidelberg...

Judas Iscariot

(Encyclopedia)Judas Iscariot ĭskârˈēət [key], Jesus' betrayer, possibly from the village of Kerioth, the only Judaean disciple among the Twelve, and, according to the Gospel of St. John, their treasurer. Judas...