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- 1Canadian telescope maps earliest hydrogen glow of universe▼Canadian telescope directly maps earliest glow of hydrogen, opening a new window on the universe
Scientists in Canada have used a radio telescope to directly map the earliest glow of hydrogen in the universe, according to an announcement involving researchers at the University of British Columbia. The result opens what researchers call a new window on the early universe, allowing direct observation of hydrogen from a period previously accessible mainly through indirect inference.
- 2Silicon effect enables new route for chiral alcohol couplings●β-Silicon effect enables direct HAT for enantioconvergent couplings of α-silyl alcohols [IMAGE]
Chemists report that the beta-silicon effect enables direct hydrogen atom transfer (HAT) for enantioconvergent couplings of alpha-silyl alcohols. The finding means two different alcohol-derived fragments can be joined efficiently into a single enantioenriched product, a long-standing challenge in synthesis, with the silicon atom steering the reaction pathway. Researchers say the approach could simplify how complex chiral molecules, including potential drug candidates, are built from readily available alcohol starting materials.