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A problem set, sometimes shortened as pset, [1] is a teaching tool used by many universities. Most courses in physics, math, engineering, chemistry, and computer science will give problem sets on a regular basis. [2] They can also appear in other subjects, such as economics.
The Sharpless epoxidation is viable with a large range of primary and secondary alkenic alcohols. Furthermore, with the exception noted above, a given dialkyl tartrate will preferentially add to the same face independent of the substitution on the alkene.To demonstrate the synthetic utility of the Sharpless epoxidation, the Sharpless group created synthetic intermediates of various natural ...
The travelling purchaser problem, the vehicle routing problem and the ring star problem [1] are three generalizations of TSP. The decision version of the TSP (where given a length L , the task is to decide whether the graph has a tour whose length is at most L ) belongs to the class of NP-complete problems.
[1] [2] He was awarded the 2001 Wolf Prize in Chemistry together with Henri B. Kagan and Ryoji Noyori “for their pioneering, creative and crucial work in developing asymmetric catalysis for the synthesis of chiral molecules, greatly increasing humankind´s ability to create new products of fundamental and practical importance”.
Sh 2-155 is an ionized H II region with ongoing star formation activity, [1] at an estimated distance of 725 parsecs (2400 light-years) from Earth. [ 2 ] [ 3 ] Sh 2-155 [ 4 ] was first noted as a galactic emission nebula in 1959 in the extended second edition of the Sharpless catalogue , [ 5 ] being a part of the much larger Cep OB3 Association ...
Michael Sharples (born 14 December 1952 in Sale, England) is a British academic working in educational technology. He is an Emeritus Professor of Educational Technology at The Open University . [ 1 ]
Corey's suggestion was based on a previous computational study done by Jorgensen and Hoffmann which determined the [3+2] reaction pathway to be the lower energy pathway. In addition Corey reasoned that steric repulsions in the octahedral intermediate would disfavor the [2+2] pathway. Osmium tetroxide dihydroxylation proposed and correct mechanism
Sharples also fended off 23 intellectual property infringement lawsuits from DeLaval between 1890 and 1919. With his wealth, he built a mansion called Greystone Hall. He was a long-time trustee of Swarthmore College and co-founded the Farmers and Mechanics' Trust Company in West Chester. [1] [3] [2] Sharples retired in 1925.