(E)-Stilbene – -Stilbene, is an organic compound with the formula 2. Classified as a diarylethene, it features a central double bond substituted with phenyl groups on each carbon atoms of the double bond. The name stilbene is derived from the Greek word stilbos, which means shining and it is a white solid that dissolves in.

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– -Stilbene, is an organic compound with the formula 2. Classified as a diarylethene, it features a central double bond substituted with phenyl groups on each carbon atoms of the double bond.

The name stilbene is derived from the Greek word stilbos, which means shining and it is a white solid that dissolves in organic solvents. Stilbene exists as two possible stereoisomers, one is trans-1, 2-diphenylethylene, called -stilbene or trans-stilbene. -Stilbene has a point of 5–6 °C, while -stilbene melts around 125 °C. One popular route entails reduction of using zinc. Stilbene undergoes reactions typical of alkenes, being susceptible to bromination, epoxidation, upon UV irradiation it converts to cis-stilbene, a classic example of a photochemical reaction involving trans-cis isomerization.

E-Stilbene itself is of value, but it is a precursor to other derivatives used as dyes, optical brighteners, phosphors. Stilbene is one of the gain mediums used in dye lasers, the stilbenoids are naturally occurring stilbene derivatives. Examples include resveratrol and its cousin, pterostilbene, the stilbestrols, which are structurally but not synthetically related to E-stilbene, exhibit estrogenic activity. Members of this group include diethylstilbestrol, fosfestrol, and dienestrol 2.

– The 13th Legislative Assembly of British Columbia sat from 1913 to 1916. The members were elected in the British Columbia general election held in March 1912, the British Columbia Conservative Party led by Richard McBride formed the government. McBride resigned as premier in December 1915 to become British Columbias agent general in London, william John Bowser succeeded McBride as Premier.

David McEwen Eberts served as speaker, the following members were elected to the assembly in 1912. On May 15,1916, he is expelled from the Social Democrats and becomes an Independent Socialist 3. – The 14th Legislative Assembly of British Columbia sat from 1917 to 1920. The members were elected in the British Columbia general election held in September 1916, the British Columbia Liberal Party, led by Harlan Carey Brewster, formed the government.

Following Brewsters death in March 1918, John Oliver became Premier, John Walter Weart served as speaker until the start of the 1918 session, when John Keen succeeded him as speaker. The following members were elected to the assembly in 1916, at some point in the life of the legislature McIntosh, Richard John Burde, Kenneth Forrest Duncan and Francis William Henry Giolma form the Soldier Party 4. – The 16th Legislative Assembly of British Columbia sat from 1924 to 1928. The members were elected in the British Columbia general election held in June 1924, the British Columbia Liberal Party, led by John Oliver, formed a minority government. Following Olivers death in August 1927, John Duncan MacLean became Premier, John Andrew Buckham served as speaker for the assembly. The following members were elected to the assembly in 1924, george Alexander Walkem joins the Conservatives in 1928 5. – The 18th Legislative Assembly of British Columbia sat from 1934 to 1937.

The members were elected in the British Columbia general election held in November 1933, the Liberal Party, led by Thomas Dufferin Pattullo, formed the government. The Co-operative Commonwealth Federation formed the official opposition, henry George Thomas Perry served as speaker for the assembly. The following members were elected to the assembly in 1933 6. – Bank Building, formerly 190 South LaSalle Street, is a 573 ft tall skyscraper in Chicago, Illinois.

It was completed in 1987 and has 40 floors, johnson/Burgee Architects designed the building, which is the 57th tallest building in Chicago. From 1988-2016 the lobby of the featured a tapestry by Helena Hernmarck titled The 1909 Plan of Chicago depicting the Civic Center Plaza proposed in the Burnham Plan of Chicago. List of tallest buildings in Chicago Notes Media related to 190 South LaSalle Street at Wikimedia Commons 7. – The 65th Indianapolis 500 was held at the Indianapolis Motor Speedway in Speedway, Indiana on Sunday, May 24,1981. The race is considered one of the most controversial races in Indy history. Bobby Unser took the flag as the winner, with Mario Andretti second.

After the conclusion of the race, USAC officials ruled that Unser had passed cars illegally while exiting the pit area during a caution on lap 149, Unser was subsequently issued a one-position penalty. The next morning, the race results were posted. Mario Andretti was elevated to first place and declared the race winner, after a lengthy protest and appeals process, the penalty was rescinded, and Unser was reinstated the victory on October 9. Officially, it became Unsers third-career Indy 500 victory and his win in Indy car competition.

Unser stepped out of the car at the end of the season, the race was officially part of the 1981–82 USAC season. However, most of the top entrants participated in the 1981 CART PPG Indy Car World Series, championship points for the 1981 Indy 500 were not awarded towards the CART title. The hectic month of May 1981 was interrupted several times by rain, pole qualifying stretched over three days due to inclement weather, and several days of practice were cut short or lost due to rain. The 1981 race is remembered for the horrifying crash of Danny Ongais. Ongais was seriously injured, and Mears suffered burns, but both drivers would recover, another major pit fire occurred later in the season at the Michigan 500, prompting new rules and standards to be put in place regarding the safety of fueling rigs. Three years into the first open wheel split, the sport of Indy car racing began settling into a mostly stabilized environment by 1981, the upstart CART series sanctioned the season of races. The Indianapolis 500 itself became a race sanctioned by USAC, involving the CART regulars.

USAC kept alive their own Gold Crown championship, running Indy, a record total of 105 entries were expected to shatter the previous records for drivers on the track and qualifying attempts. Speed-cutting measures were still in place, and no drivers were expected to challenge the track records in 1981, Mario Andretti, as he had done in previous years, planned to race at Indianapolis in-between his busy, full-time Formula One schedule. His plans included qualifying at Indy on pole day weekend, then flying to Europe for the Belgian Grand Prix, after Belgium, he would fly back to Indianapolis in time for race day. For the first time, USAC held a special test session for first-time drivers, the first-ever Rookie Orientation Program was organized and held over three days in early April 8.

– The 19th Legislative Assembly of British Columbia sat from 1937 to 1941. Download Facebook Messenger For Sony Ericsson Wt13i on this page. The members were elected in the British Columbia general election held in June 1937, the Liberal Party, led by Thomas Dufferin Pattullo, formed the government.

The Conservative Party formed the official opposition, norman William Whittaker served as speaker for the assembly. The following members were elected to the assembly in 1937, Notes, By-elections were held to replace members for various reasons, Notes, Rolf Wallgren Bruhn joins the Conservatives in 1938.

James Lyle Telford expelled from the CCF on June 26,1939, and becomes an independent 9. – 2, 4-Dichlorophenoxyacetic acid is an organic compound with the chemical formula C8H6Cl2O3. It can be found in commercial lawn herbicide mixtures, and is widely used as a weedkiller on cereal crops, pastures. Over 1,500 herbicide products contain 2, 4-D as an active ingredient,2, 4-D is a possible carcinogen per WHO. Some ester forms are highly toxic to fish and other aquatic life,2, 4-D was one of the ingredients in Agent Orange, a herbicide widely used during the Vietnam War. However, another ingredient in Agent Orange,2,4, 5-T,2, 4-D is primarily used as a selective herbicide which kills many terrestrial and aquatic broadleaf weeds, but not grasses.

It acts by mimicking the action of the plant growth hormone auxin, because it was discovered in the 1940s, there is no longer a patent governing the manufacture and sale of 2, 4-D, and any company is free to produce it. Thus, it is sold in formulations under a wide variety of brand names. 2, 4-D can be found in commercial lawn herbicide mixtures, over 1,500 herbicide products contain 2, 4-D as an active ingredient. A wide variety of different sectors use products containing 2, 4-D to kill weeds, in agriculture, it was the first herbicide found to be capable of selectively killing weeds but not crops. It has been used since 1945 to control broad-leafed weeds in pastures, orchards, cereals, in particular, have excellent tolerance to 2, 4-D when it is applied before planting. 2, 4-D is the cheapest way for farmers to control winter annual weeds by spraying in the fall and this is particularly effective before planting beans, peas, lentils and chickpeas. In domestic lawn and garden maintenance,2, 4-D is commonly used for weed control in lawns and it is used to kill unwanted weeds such as dandelions, plantain, clover and chickweed.

In forestry, it is used for treatment, trunk injection. Along roadways, railways, and power lines it is used to control weeds and brush which might interfere with safe operation, along waterways it is used to control aquatic weeds that might interfere with boating, fishing and swimming or clog irrigation and hydroelectric equipment. A2010 monitoring study conducted in the US and Canada found that current exposures to 2,2,4 D has been used in laboratories for plant research as a supplement in plant cell culture media such as MS medium since at least 1962. 2, 4-D is used in plant cell cultures as a dedifferentiation hormone and it is classified as an auxin plant hormone derivative. Some scientists are experimenting wi.