carbohydrate: Configuration: Thus, although d-xylose and d-lyxose both have five carbon atoms and are of the d-configuration, the spatial arrangement of the asymmetrical centres (at carbon atoms 2, 3, and 4) is such that they are not mirror images.

Ukraine: Music of Ukraine: Ruslana Lyzhichko, winner of the Eurovision Song Contest in 2004, emerged as the country’s first international star of the 21st century.

airship: …completed his first airship, the LZ-1, in 1900. This technically sophisticated craft, 128 metres (420 feet) long and 11.6 metres (38 feet) in diameter, had an aluminum frame of 24 longitudinal girders set within 16 transverse rings and was powered by two 16-horsepower engines; it attained speeds approaching 32 km…

Hindenburg, German dirigible, the largest rigid airship ever constructed. In 1937 it caught fire and was destroyed; 36 people died in the disaster. The Hindenburg was a 245-metre- (804-foot-) long airship of conventional zeppelin design that was launched at Friedrichshafen, Germany, in March 1936.

military aircraft: Airships: …of the zeppelins was the LZ-70; this craft was 220 metres (720 feet) long, was able to fly above 4,900 metres (16,000 feet), and had a range of 12,000 km (7,500 miles). The LZ-70 was shot down late in the war, however, and large rigid (metal-framed) airships were never again…

False Dmitry: Although the second False Dmitry bore no physical resemblance to the first, he gathered a large following among Cossacks, Poles, Lithuanians, and rebels who had already risen against Shuysky. He gained control of southern Russia, marched toward Moscow, and established his headquarters (including a full court and…

False Dmitry: In March 1611 a third False Dmitry, who has been identified as a deacon called Sidorka, appeared at Ivangorod. He gained the allegiance of the Cossacks (March 1612), who were ravaging the environs of Moscow, and of the inhabitants of Pskov, thus acquiring the nickname Thief of Pskov. In…

False Dmitry: …Boris Godunov succeeded him, the first False Dmitry appeared and challenged Godunov’s right to the throne. The first pretender is considered by many historians to have been Grigory (Yury) Bogdanovich Otrepyev, a member of the gentry who had frequented the house of the Romanovs before becoming the monk Grigory and…

GIF: …algorithm commonly referred to as LZW, named after its inventors, Abraham Lempel and Jacob Ziv of Israel and Terry Welch of the United States. LZW was the source of a controversy started by the American Unisys Corporation in 1994, when it was revealed that they owned a patent for LZW…