The chemical compound 1,2-dichloroethane, commonly known by its old name of ethylene dichloride (EDC), is a chlorinated hydrocarbon, mainly used to produce vinyl chloride monomer (VCM, chloroethene), the major precursor for PVC production. It is a colourless liquid with a chloroform-like odour. 1,2-Dichloroethane is also used generally as an intermediate for other organic chemical compounds and as a solvent. It forms azeotropes with many other solvents, including water (b.p. 70.5 C) and other chlorocarbons.

In 1794, physician Jan Rudolph Deiman, merchant Adriaan Paets van Troostwijk, chemist Anthoni Lauwerenburg, and botanist Nicolaas Bondt, under the name of Gezelschap der Hollandsche Scheikundigen (Dutch: Society of Dutch Chemists), were the first to produce 1,2-dichloroethane from olefiant gas (oil-making gas, ethylene) and chlorine gas. Although the Gezelschap in practice did not do much in-depth scientific research, they and their publications were highly regarded. Part of that acknowledgement is that 1,2-dichloroethane has been called "Dutch oil" in old chemistry.

Aaron Yan (traditional Chinese: 炎亞綸; simplified Chinese: 炎亚纶; pinyin: Yán Yǎlún), born Aaron Wu Keng-Lin (traditional Chinese: 吳庚霖; simplified Chinese: 吴庚霖; pinyin: Wú Gēnglín; born November 20, 1985) in Taiwan, is a Taiwanese Mandopop singer, commercial model and actor. He is the youngest member of Taiwanese Mandopop vocal quartet boy band Fahrenheit.

At a young age, his family moved to New York,U.S., where he stayed for his primary school education for about five years. He then moved back to Taiwan for further education.

He can speak and understand Mandarin, Taiwanese Hokkien, English and limited Japanese and Cantonese. He was a sophomore at Chinese Culture University, majoring in Journalism and News Broadcasting. However, because his career had greatly affected his academics and learning environment, he transferred to Jinwen University of Science and Technology, majoring in English. In October 2010, Aaron announced that he had quit schooling to focus on his career instead. Having injured his knee previously, Aaron is also exempted from serving in the national army.

Roger Federer (German pronunciation: [ˈfeːdəʁɐ]) (born 8 August 1981) is a Swiss professional tennis player who held the ATP No. 1 position for a record 237 consecutive weeks from 2 February 2004 to 18 August 2008. Federer has occupied the #1 ranking for 285 overall weeks, one week short of the record 286 weeks held by Pete Sampras. As of 28 May 2012, he is ranked World No. 3. Federer has won a men's record 16 Grand Slam singles titles. He is one of seven male players to capture the career Grand Slam and one of three (with Andre Agassi and Rafael Nadal) to do so on three different surfaces (clay, grass, and hard courts). He is the only male player in tennis history to have reached the title match of each Grand Slam tournament at least five times and also the final at each of the nine ATP Masters 1000 Tournaments. Many sports analysts, tennis critics, and former and current players consider Federer to be the greatest tennis player of all time.

Federer has appeared in an unprecedented 23 career Grand Slam tournament finals, including a men's record ten in a row, and appeared in 18 of 19 finals from the 2005 Wimbledon Championships through the 2010 Australian Open, the lone exception being the 2008 Australian Open. He holds the record of reaching the semifinals or better of 23 consecutive Grand Slam tournaments over five and a half years, from the 2004 Wimbledon Championships through the 2010 Australian Open. At the 2012 Australian Open, he reached a record 31st consecutive Grand Slam quarterfinal. During the course of his run at the 2012 French Open in Roland Garros, Federer eclipsed Jimmy Connors long standing record of 233 match wins in Grand Slam tournaments when he defeated Adrian Ungur in a second round match.

Milos Raonic ( /ˈmiːloʊʃ ˈraʊnɪtʃ/ MEE-lohsh ROW-nich;Serbian: Милош Раонић, Miloš Raonić [mîloʃ râonitɕ]; born December 27, 1990) is a Canadian professional tennis player who lives in Thornhill, Ontario, Canada.

Born in what is now Podgorica, Montenegro, Raonic moved to Canada with his family at the age of 3. He speaks his native Serbian and English. Raonic is Canada's highest ATP ranked male singles player since computer rankings began in 1973. He qualified for his first grand slam event at the 2010 U.S. Open. In 2011 he rose from World No. 152 to No. 37 in a month, after he reached the fourth round of the Australian Open and won his first ATP title at the 2011 SAP Open. Raonic, who prefers to play on hard courts, plays an all-court game but is most notable for his serve, which is powerful and accurate. Since late 2010 he has been coached by former Spanish pro player Galo Blanco in Barcelona.

Raonic's first ITF-sanctioned junior tennis event was the qualifying draw for the Canadian ITF Group 4 Championships in October 2003, where he lost in the first round to fellow Canadian Kirill Sinitsyn 6–7, 3–6. His next junior circuit action was a year later at the Canadian ITF Championships 1 event, where he lost in the first round of the main draw 4–6, 4–6 to compatriot Peter Marrack. In doubles at the same event he and partner Sheharyar Wali, also Canadian, reached the second round.

David Luiz Moreira Marinho (born 22 April 1987), known as David Luiz, is a Brazilian footballer who plays for Chelsea in the Premier League. Primarily a central defender, he can also be deployed as a left back.

After starting out at Vitória, he moved to Benfica at the age of 19, remaining with the club five seasons (three complete). He joined Chelsea in January 2011, winning the Champions League and the FA Cup in the following season.

Born in Diadema, São Paulo, David Luiz arrived in Esporte Clube Vitória at the age of 14 after being released by São Paulo FC, and started playing as a defensive midfielder, almost leaving the club for his poor performances in that position. However, he was soon moved to central defender and adapted well.

Luiz made his official debut for Vitória in 2006, and excelled against Santa Cruz Futebol Clube for that season's Brazilian Cup, in a 2–2 draw. At the worst situation of its history, in the third division, Vitória promoted to the second division at the end of the season with Luiz's help, after finishing in second position, with the central appearing in eight of the club's last decisive nine games, scoring his only Série C goal on 3 September 2006, in a 2–0 home win against Clube Atlético do Porto.