An alpha helix (α-helix) is a twisted part of a protein. It is one of the two most common parts of the secondary structure, or shape, of a protein. The other is the beta sheet. An alpha helix is created by alternating groups of atoms. There is a carbonyl group, created by a carbon atom double bonded to an oxygen atom, and an amine group, created by a nitrogen atom bonded to a hydrogen atom. Each section containing one of each of these groups is called a residue, a general term for a small part of a molecule. Each amine group forms a hydrogen bond with the carbonyl group four residues earlier. A prion is a protein that causes disease by changing the shape of another protein. It does this by changing some of the alpha helices, which are more common in normal cells, to beta sheets, which are more common in prions. The alpha helix consists of 3.6 residues per turn. All hydrogen bonds face in the same direction. If two or more alpha helices come together, they become a tertiary structure. (Ex. Five alpha helices arranged into a barrel shape)
Allied-occupied Germany
After World War II Nazi Germany west of the Oder-Neisse line was divided into four occupation zones. This had been agreed in London in September 1944.
They were occupied by the allied powers who defeated Germany (the Soviet Union, the United Kingdom and the United States) and by France. This was done for administrative purposes during the period 1945-1949.
In the closing weeks of fighting in Europe the American forces had actually pushed beyond the previously agreed upon occupation zone boundaries, sometimes by as much as 200 miles. After about two months of holding certain areas meant to be in the Soviet zone, the American forces withdrew during July 1945.
Topaz
Topaz is a silicate mineral. Along with silicate, it includes the chemical elements aluminium and fluorine with the chemical formula AlSiO(F,OH).
Pure topaz is colorless and transparent but they usually have colors made by small impurities. The typical topaz is wine, yellow, pale gray, reddish-orange, or blue brown. It can also be made white, pale green, blue, gold, or pink (rare).
"Orange topaz", also known as precious topaz, is the traditional November birthstone, the symbol of friendship, and the state gemstone for the US state of Utah.
"Imperial topaz" is yellow, pink (rare, if natural) or pink-orange. Some imperial topaz stones can fade if they are exposed too much in the sunlight.
"Blue topaz" is the US state Texas' gemstone.
"Mystic topaz" is colorless topaz which has been artificially coated, making it rainbow-colored.
Beautiful (song)
Beautiful is a song from Christina Aguilera's fourth album "Stripped". It was written by Linda Perry.
Aguilera sings about how people should not be ashamed to show pride in their differences.
It was released late in 2002. It was the second single from "Stripped".
"Beautiful" won a Grammy Award for Best Female Pop Vocal Performance.
In 2004, the character Damian sang the song at the school's talent show in "Mean Girls".
Fundamental theorem of algebra
The fundamental theorem of algebra is a proven fact about polynomials, sums of multiples of integer powers of one variable. It is based on mathematical analysis, the study of real numbers and limits. It was first proven by German mathematician Carl Friedrich Gauss. It says that for any polynomial formula_1 with the degree formula_2, where formula_3, the polynomial equation formula_4 must have at least one root formula_5, and not more than formula_2 roots altogether.
Some remarks:
R.E.M. (band)
R.E.M. is an American rock band. It was formed in Athens, Georgia in 1980. R.E.M. was one of the first popular alternative rock bands. R.E.M. released its first single, "Radio Free Europe" in 1981. The lead singer of the band was Michael Stipe.
During the 1980s, R.E.M. were one of the most important rock bands in the campus radio movement. They became successful internationally in 1987, when they released the songs, "The One I Love" and "It's The End Of The World As We Know It (And I Feel Fine)". They were very popular in the early 1990s and broke-up in 2011. They have been inducted in to the Rock and Roll Hall of Fame.
R.E.M. has been associated with many different bands within the years. Most of them from different parts of the world.
Finite
If something is finite, it means it will end. The opposite is infinite. There are many uses of this word, for example:
Israel
Lake Champlain
Lake Champlain is a natural freshwater lake in North America along the borders of New York and Vermont and partially across the United States-Canada border in the province of Quebec. The lake was named for the French explorer Samuel de Champlain, who came there in 1609.
Lake Champlain is one of a large number of large lakes spread in an arc from Labrador through the northern United States and into the Northwest Territories of Canada. Although it is much smaller than the Great Lakes of Ontario, Erie, Huron, Superior, or Michigan, Lake Champlain is a large body of fresh water. The lake is about in area. It is about long. At its widest point, it is about wide. The maximum depth is about . It contains about 80 islands, including an the entire country of Grand Isle County in Vermont.
In the colonial times, Lake Champlain gave an easily blocked water (or, in winter, ice) passage between the Saint Lawrence and the Hudson Valleys. Boats and sledges were usually preferable to the unpaved and frequently mud-bound roads of the time. The northern tip of the lake at Saint-Jean-sur-Richelieu, Quebec (St. John in colonial times) is a short distance from Montreal. The southern tip at Whitehall (Skenesborough in colonial times) is a short distance from Saratoga, Glens Falls, and Albany, New York.
Forts at Ticonderoga and Crown Point (Fort St. Frederic) controlled passage of the lake in colonial times. Important battles were fought at Ticonderoga in 1758 and 1777. A important naval battle was fought in 1776 at Valcour Island: in the Battle of Valcour Island, Benedict Arnold delayed British ships enough to prevent the fall of these forts until the following year, allowing the Continental Army to grow stronger and allowing the later victory at Saratoga.
Fumie Suguri
Suguri is expressive, her program is called "Suguri World". Her younger sister Chika Suguri is figure skater likewise, too.
She was first Japanese skater to win the ISU Grand Prix Final in 2003, and got more Four Continents Championships titles in 2005, and got more World Championships medals than other Japanese figure skater in 2006.
Occupational Safety and Health Administration
The United States Occupational Safety and Health Administration (OSHA) is an agency of the United States Department of Labor. It was created by Congress under the Occupational Safety and Health Act and was signed by President Richard M. Nixon, on December 29, 1970. Its mission is to prevent work-related injuries, illnesses, and deaths by making and enforcing rules (called standards) for workplace safety and health. As of March 2006, the agency is headed by Assistant Secretary of Labor Edwin Foulke.
Arsenio Hall
Arsenio Hall (born February 12, 1956) is an American actor and comedian. He hosted his own television talk show, "The Arsenio Hall Show", from 1989 to 1994 on the Fox network. He also had his own sitcom on ABC titled, "Arsenio"
Hall co-starred with Eddie Murphy in the movies "Coming to America" and "Harlem Nights". After his own television series ended, Hall sometimes guest-starred on "The Tonight Show" with Jay Leno.
Hall was born in Cleveland, Ohio.
Bezenye
Bezenye is a village in the north-west of Hungary. It is very close to the border with Slovakia and only 9 km from the Slovakian capital city Bratislava. The population is about 1600.