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[2] If two identical substituents are attached to an sp 3-hybridized atom, the descriptors pro-R and pro-S are used to distinguish between the two. Promoting the pro-R substituent to higher priority than the other identical substituent results in an R chirality center at the original sp 3-hybridized atom, and analogously for the pro-S substituent.
Enantioselective ketone reductions convert prochiral ketones into chiral, non-racemic alcohols and are used heavily for the synthesis of stereodefined alcohols. [1]Carbonyl reduction, the net addition of H 2 across a carbon-oxygen double bond, is an important way to prepare alcohols.
And since the inner ear helps with maintaining balance people with hearing loss are 2.4 times more likely to suffer from falls — a danger that hearing aids can prevent by up to 50%.
Mid-Ohio Sports Car Course is a road course auto racing facility located in Troy Township, Morrow County, Ohio, United States, just outside the village of Lexington. It hosts a number of racing series such as IndyCar , IMSA WeatherTech Sportscar Championship , along with other club events such has SCCA and National Auto Sport Association .
The Midwest Modifieds Tour started in 1989 as the E-Mod Series at Mount Lawn Speedway near Indianapolis IN. It has undergone several name changes including ICAR, NSTA Top Speed Modified Tour, and the USA Modified Series. This travelling series races at local short tracks in Indiana, Michigan, and Ohio.
2022 Polaris RZR Pro R Ultimate 4-Seater. The Polaris RZR (Often pronounced as POLARIS RAZOR), is a sport side-by-side produced by Polaris Industries.When launched in 2007 as a 2008 model, it was officially known as the Ranger RZR, as it was marketed as a sub-model of the larger, work-oriented Ranger.
The grants can be applied to accessibility-related modifications like a walk-in bathtub, installing grab bars in showers and changes that make a home more accessible for those with disabilities.
The Airco DH.9A is a British single-engined light bomber that was designed and first used shortly before the end of the First World War.It was a development of the unsuccessful Airco DH.9 bomber, featuring a strengthened structure and, crucially, replacing the under-powered and unreliable inline 6-cylinder Siddeley Puma engine of the DH.9 with the American V-12 Liberty engine.