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Access to the structure provided answers to central questions in biology, regarding the movement of ions across the cell membrane. In particular, the structure revealed the mechanism with by which these channels move potassium ions both quickly and selectively, reliably preventing similarly sized sodium ions from passing through.
This is a list of unsolved problems in chemistry. Problems in chemistry are considered unsolved when an expert in the field considers it unsolved or when several experts in the field disagree about a solution to a problem.
David A. Evans (January 11, 1941 – April 29, 2022) [1] [2] [3] was an American chemist who was the Abbott and James Lawrence professor of chemistry at Harvard University. [4] [5] He was a prominent figure in the field of organic chemistry and his research focused on synthetic chemistry and total synthesis, particularly of large biologically active molecules.
A development of a consensus map (also called an essential map, core map, district map, or master map) takes places in Phase 3 of Heidi Hayes Jacobs's Four Phases of Curriculum Mapping. Hale (2008) distinguishes between consensus maps and essential maps, assigning the former to the building level, and the latter to the district level (p. 145). [8]
By 1973, Harvard Library had authored or published over 430 volumes in print in addition to nine periodicals and seven annual publications. Among these is a monthly newsletter, The Harvard Librarian and a quarterly journal, Harvard Library Bulletin, which was established in 1947, dormant from 1960 until 1967, and published regularly since. [23]
The most common method of teaching chemistry is lecture with a laboratory component. Laboratory courses became a central part of the chemistry curriculum towards the end of the 19th century. The German scientist Justus von Liebig plays a major role in shifting the model of lecture with demonstrations to one that includes a laboratory component.
George McClelland Whitesides (born August 3, 1939) is an American chemist and professor of chemistry at Harvard University.He is best known for his work in the areas of nuclear magnetic resonance spectroscopy, organometallic chemistry, molecular self-assembly, soft lithography, [3] microfabrication, microfluidics, and nanotechnology.
Charles M. Lieber (born 1959) [1] is an American chemist, inventor, nanotechnologist, and writer. In 2011, Lieber was named the leading chemist in the world for the decade 2000–2010 by Thomson Reuters, based on the impact of his scientific publications. [2]