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Regioselectivity is the preference of one direction of chemical bond making or breaking over all other possible directions. It can apply to which of many possible positions a reagent will affect, such as which proton a strong base will abstract from an organic molecule, or where on a substituted benzene ring a further substituent will add. A specific example is a halohydrin formation reaction with 2-propenylbenzene: Because of the preference for the formation of one product over another, the reaction is selective; this reaction is regioselective because it selectively generates one constitutional isomer rather than the other. Various examples of regioselectivity have been formulated as rules for certain classes of compounds under certain conditions, many of which are named. Among the first introduced to chemistry students are Markovnikov's rule for the addition of protic acids to alkenes, the Fürst-Plattner rule for the addition of nucleophiles to derivatives of cyclohexene epoxide derivatives.

Regioselectivity in ring-closure reactions is subject to Baldwin's rules. If there are two or more orientations that can be generated during a reaction, one of them is dominant Regioselectivity can be applied to specific reactions such as addition to pi ligands. Selectivity occurs in carbene insertions, for example in the Baeyer-Villiger reaction. In this reaction, an oxygen is regioselectively inserted near an adjacent carbonyl group. In ketones, this insertion is directed toward the carbon, more substituted. For example, in a study involving acetophenones, this oxygen was preferentially inserted between the carbonyl and the aromatic ring to give acetyl aromatic esters instead of methyl benzoates. Zaitsev's rule Cryptoregiochemistry Chemoselectivity Stereoselectivity Enantioselectivity Keto–enol tautomerism

1987 in baseball

The following are the baseball events of the year 1987 throughout the world. World Series: Minnesota Twins over St. Louis Cardinals. February 25 – Baseball Commissioner Peter Ueberroth suspends San Diego Padres pitcher LaMarr Hoyt from baseball following his third arrest on drug possession charges, this time on the U. S.-Mexico border. Hoyt is sentenced to 45 days in jail on December 16, 1986. An arbitrator cuts Hoyt's suspension to sixty days in mid-June and orders the Padres to reinstate him; the Padres, give him his unconditional release the following day. March 3 – Ray Dandridge, a third baseman from the Negro Leagues, is the only player elected to the Hall of Fame by the Special Veterans Committee. March 27 – The New York Mets acquire David Cone and Chris Jelic from the Kansas City Royals in exchange for Rick Anderson, Mauro Gozzo and Ed Hearn. April 6 – Al Campanis, general manager of the Los Angeles Dodgers and a former teammate of Jackie Robinson, appears on the ABC news program Nightline to discuss the progress of racial integration of baseball as the fortieth anniversary of Robinson's first game approaches.

When asked by Nightline host Ted Koppel why more African-Americans do not become managers or executives, Campanis states that Blacks lack certain qualities for those jobs, drawing the ire of host Koppel. Campanis is fired by the Dodgers two days later. April 13 – At Jack Murphy Stadium, the San Diego Padres set a major league record when the first three batters in the bottom of the first inning hit home runs off San Francisco Giants starter Roger Mason in their home opener; the Padres, trailing 2 -- 0, got homers from Tony Gwynn and John Kruk. April 15 – Juan Nieves of the Milwaukee Brewers pitches a no-hitter against the Baltimore Orioles. Nieves becomes the second-youngest pitcher in major league history to accomplish the feat, as well as the first Brewer to do it. April 17 – Mike Schmidt of the Philadelphia Phillies hits the 500th home run of his career, it comes in the ninth inning against the Pittsburgh Pirates' Don Robinson, giving the Phillies an 8–6 win at Pittsburgh. June 1 – Knuckleballer Phil Niekro of the Cleveland Indians beats the Detroit Tigers, 9–6.

This is his 314th major league victory for Niekro, which paired him with brother Joe a current total of 216 wins, making them the winningest pitching brother duo, surpassing the 529 wins posted by Gaylord Perry and Jim Perry. The Niekros will finish their careers with a combined 539 wins. June 2 – The Seattle Mariners use the number-one overall pick of the 1987 MLB draft to select Ken Griffey, Jr. signaling a turnaround in their fortunes as an organization. June 17 - Former Kansas City Royals manager Dick Howser dies of brain cancer at age 51. Howser had attempted to manage the team at the start of spring training, but found he was physically too weak and was replaced by Billy Gardner. June 22 – With their starting rotation decimated by injuries, the New York Mets seek help from Tom Seaver, not offered a contract to his liking following the 1986 season, whose salary was $1 million; the Boston Red Sox offer him $500,000, which Seaver declines. Though no actual contract is signed, Seaver joins the Red Sox on June 6, is hit hard on during an exhibition game against the Triple-A Tidewater Tides on June 11.

After poor outings on the 16th & 20th, he announces his retirement. June 28 – Don Baylor of the visiting Boston Red Sox is hit by a pitch from Rick Rhoden in the sixth inning of a 6–2 win over the New York Yankees; the HBP gives Baylor 244 for his career. July 14 – Tim Raines caps a 3-for-3 performance in the All-Star Game with a two-run triple in the top of the 13th inning, giving the National League a 2–0 victory over the American League. Raines is selected the MVP. July 18 – New York Yankees first baseman Don Mattingly homers in his record-tying eighth straight game, in a 7-2 Texas Rangers win over the Yankees, he ties the record set by Dale Long in 1956. August 2 – At Royals Stadium, Kevin Seitzer goes 6-for-6 with two home runs and seven runs batted in the Kansas City Royals' 13-5 victory over the Boston Red Sox. Seitzer becomes the second Royal to collect six hits in one game, Bob Oliver having done so in 1969, the franchise's inaugural season. August 11 –

1 South African Tank Regiment

1 South African Tank Regiment is an armoured regiment of the South African Army, based at the Tempe military base in Bloemfontein as part of the South African Army Armour Formation. The Regiment was established in April 1999, composed of members of the old Tank Wing of the National Defence Force's School of Armour; this unit supplies the only full-time tank force to the SA Army. Lt Col William Nondala, the second CO, was the first black commanding officer appointed in the country's Armoured Corps. There were 724 available posts, but only 335 were staffed and 389 vacant in 2005; the highest shortage level was experienced at the level of trooper. The unit trains jointly with the reserve force units to enhance the ‘one force’ concept, because the reserve force is the expansionary capability of the SANDF in times of national defence. There is however only a small percentage of active reserves, because training call-ups are limited, due to budgetary constraints, it is equipped with the Olifant Mk.2 main battle tank.

The unit’s structure is a ‘type 38 regiment’, with 2 tanks at regimental headquarters and 12 tanks each in the three operational squadrons. There are support squadrons and tank transport squadrons; the Olifant tanks have been upgraded with new power packs and stabilized night vision equipment. The vehicles are capable of fire on the move manoeuvres; the Olifants may be replaced with a small number of new Main Battle Tanks some time after 2018. Due to a lack of funds for their primary armoured role and a shortage of regular infantry, the unit has been deployed in their secondary line infantry role on border patrol and external peacekeeping operations in central Africa; the C squadron was deployed from April to July 2004 along the Lesotho border and received praise from the Tactical headquarters and the farming community. Another squadron was deployed from December 2004 to March 2005. Several members of the unit have been deployed to the Democratic Republic of Congo, DRC as part of the United Nations’ peacekeeping force MONUSCO and in Burundi as VIP protectors

Daraga, Albay

Daraga the Municipality of Daraga, is a 1st class municipality in the province of Albay, Philippines. According to the 2015 census, it has a population of 126,595 people; the town is home to the landmark Cagsawa Ruins. The word daraga referred to a "maiden", is the modern term for an "unmarried woman" in many of the Bikol languages; the original settlement of Daraga dates back to 12th century, but has changed location due to the constant threats posed by Mayon Volcano. The town was named Budiao and Locsin. Daraga is located at 13°09′43″N 123°41′38″E, in the south-west portion of Albay province, along the Maharlika Highway, making it accessible from Manila, the Visayas, the other municipalities of eastern Bicol Peninsula, it is "boot-shaped", with the "tall" part ranging 13.05–13.25° north latitude and 123.66–123.73° east longitude and the "wide" part ranging 13.02–13.09° north latitude and 123.56–123.71° east longitude. It is bounded on the north and east by Legazpi City, south by Sorsogon, west by Camalig and Jovellar.

According to the Philippine Statistics Authority, the municipality has a land area of 118.64 square kilometres constituting 4.61% of the 2,575.77-square-kilometre- total area of Albay. This municipal land area is distributed among 42 rural barangays; the urban barangays total 1,500 hectares and the rural barangays make up the remaining 10,360 hectares of the total municipal land area. 67.3% of the total municipal land area has a predominantly low elevation of up to 100 metres. The surface terrain is characterized by combination of level to nearly level areas, gentle to undulating areas and undulating to rolling areas; the different soil types to be found within Daraga are the Mayon Gravelly Sandy Loam, Annam Clay Loam, Gravelly Sandy Loam, Legazpi Fine Sandy Loam, Sevilla Clay Loam and Sevilla Clay. The underlying geology are made up of several types: Alluvium and Sandstone Limestone and Basalt and Andesite Series; the prevalent geologic type is the Shale and Sandstone Sequence and other significant geologic types such as alluvium.

Recent Volcanic, Crystalline Limestone and Psyroclastine Limestone are found near the base of Mayon Volcano in the urban barangays. Minerals available within the municipality of Daraga are non-metallic consisting of Gravel, Boulders; these minerals are abundant in Barangays Budiao, Busay, Bañadero and Matnog brought down from the slopes of Mayon Volcano during occurrences of volcanic eruptions and rains. The surface drainage pattern of Daraga is affected by the water runoff coming from Mayon Volcano coupled with those from other directions. Major river systems which convey and act as natural drainage channels as well as water source include: Yawa River in Barangay Cullat, Kilicao, Binitayan & Bañag which connects to the Albay Gulf in Legazpi City Colabos Creek in Bañag, San Roque, Market Area and Bagumbayan Quillarena River in Malabog & Budiao Gumacon Creek in Barangay Maroroy, Tagas Gulang-Gulang Creek in Barangay Pandan Daraga has a wet climate characterized by a lack of dry season. Maximum rainfall is from November to January, average monthly rainfall is 223.4 millimetres.

Prevailing winds are from north-east to south-west. Average temperature is 27.0 °C. But the climate change phenomenon has changed the past climate pattern. Dry spells are becoming more pronounced; the phenomenon is felt all over the country as well. Daraga is politically subdivided into 54 barangays. In the 2015 census, Daraga had a population of 126,595; the population density was 1,100 inhabitants per square kilometre. In 2010, the 2010 municipal population of 115,804 was distributed among the urban and rural Barangays; the urban population was 48.54% while rural population completed the remaining 51.45%. The "built-up density" was 5,659 persons/km2, it had a literacy rate of 96.08% and a municipality growth rate of 1.3%. In terms of employment and livelihood, farming ranks high at 33.53%, crafts and related workers as well as elementary occupations follow second with 17.71% and 21.89% respectively. The languages spoken in Daraga include East Miraya, Bicol and English; the present town mayor is Victor U.

Perete. Daraga's economy agriculture-based, has transformed into an emerging urban system, benefiting from the economic opportunities of being located contiguously with the urban center of Legazpi, it draws trade relations with the island province of Masbate through the nearby Port of Pilar. Daraga will be the site of the future Bicol International Airport which will further boost tourism in the region and will introduce more opportunities in this town. Local officials are now considering cityhood in the near future or upon the completion of the said international airport, if that so, Daraga would be the fourth city in Albay. Daraga has the highest number of business establishments among towns in Albay; as of 2011 it has over 2,300 business establishments registered with the Permits and Licensing Office. The town is a center of handicraft manufacturing with several handicraft factories choosing their location in the municipality; each barangay in town has an elementary school. Bicol University – Daraga Belen B.

Francisco Foundation Inc. Bicol College Daraga Community College Immaculate Concepcion College of Albay Daraga has a total Road Network of about 129.01 kilometres. This is categorized either as National Roads, Pro

Thomas Strunz

Thomas Strunz is a German retired footballer who played as a defensive midfielder. Over the course of 12 seasons, he amassed Bundesliga totals of 235 games and 32 goals, representing in the competition Bayern Munich and Stuttgart, he won 12 major titles with the first club. Strunz gained 41 caps during nine years, he was part of the squad that won Euro 1996. Born in Duisburg, North Rhine-Westphalia, Strunz started his career playing for hometown club MSV Duisburg, but moved to FC Bayern Munich aged 21, he made his Bundesliga debut on 31 August 1989 in a 4–0 home win against Hamburger SV, proceeded to score five goals in 20 matches in his first season. Strunz joined VfB Stuttgart for 1992–93, netting five times in his debut campaign before returning to Bayern after three years. In his two spells with the Bavarian side he won five championship medals and two German cups, adding the 1995–96 UEFA Cup in which he scored two goals in nine games. In his final two seasons he played due to recurrent injuries, retired in late 2000 as his team went on to win back-to-back league titles.

After retiring, Strunz served as general manager at VfL Wolfsburg for nearly a year, being fired on 19 December 2005 – head coach Holger Fach was sacked on the same day, the former was awarded €2.750.000 in compensation. In April 2008 he enrolled in the same capacity at lowly Rot-Weiss Essen, being fired on 12 September of the following year. Strunz made his debut for Germany on 10 October 1990, in a 3–1 friendly win in Sweden, he went on to represent the nation at the 1994 FIFA World Cup and the victorious UEFA Euro 1996. During the latter competition, Strunz appeared in five of six matches, converting his penalty shootout attempt in the semi-finals and playing the entire final against the Czech Republic. Scores and results list Germany's goal tally first. After retiring, Strunz worked as football pundit for German TV channel Sport1. Strunz's wife, left him for fellow German international Stefan Effenberg. On 10 March 1998, he was one of the main targets in a furious press conference held by Bayern manager Giovanni Trapattoni, who addressed the media in broken German.

The Italian press was amused by his surname pronounced and with great vigor by the coach, since in Italian "stronzo" is a swear word meaning "turd", but equivalent to "asshole". Bayern MunichBundesliga: 1989–90, 1996–97, 1998–99, 1999–2000, 2000–01 DFB-Pokal: 1997–98, 1999–2000. S. Cup: 1993 Thomas Strunz at Thomas Strunz at Thomas Strunz – FIFA competition record Thomas Strunz at

Sudden Attack

Sudden Attack is a free-to-play multiplayer first-person shooter online game developed by the South Korean company GameHi. On December 2, 2013, Nexon America CEO Min Kim announced plans to discontinue Sudden Attack North American service. Nexon America terminated Sudden Attack on January 29, 2014. There are two teams in the game and blue; the red team is the Tanzirilo Independence Force, the blue team is the United Great Force. There are various types of game play. Deathmatch, capture the flag, or custom modes. Both teams must satisfy certain conditions, such as defusing a bomb, successful planting and detonation, or achieving a certain number of kills. There are two types of currencies: Points. Cash is based on real money and can be charged in exchange for a monetary payment, cell phone billing, or home phone billing and by bank transfer. Points can be earned from playing games. Points and cash can be spent at the in-game shop. Points are used for buying weapons. Cash enables the purchase of in-game boosts and special bonus items, along with special team-specific outfits.

Cash and points can be earned through participation in promotions. On September 30, 2011, Sudden Attack's Taiwanese publisher, announced it would not renew its contract with Nexon to operate the game in Taiwan. A Few months Gamania, which had published many of Nexon's games including Counter-Strike Online, obtained the rights; the game was renamed "S. A. STORM"; the game's closed beta started on February 22, 2012 and became operational on April 18, 2012. Official site for South Korea Sudden Attack 2 Official site for South Korea