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The Carolina wren was first described under the name of Sylvia ludoviciana by John Latham in 1790. [3] [note 1] Louis Pierre Vieillot considered all wrens under the genus Troglodytes and called the Carolina wren Troglodytes arundinaceus, but placed it subsequently in a separate genus Thryothorus (initially misspelled Thriothorus) [2] that he created in 1816.
The roots of Carolina Wren were in Berkeley, California, though it was birthed on January 1, 1976, in Chapel Hill, as I sat in my living room in Chase Park Apartments, looking past the balcony, where I fed wintering birds, into the woods behind them. Chase Park had grown out of the Chapel Hill Civil Rights struggle and was run by the Interfaith ...
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It is a common observation that when oil and water are poured into the same container, they separate into two phases or layers, because they are immiscible.In general, aqueous (or water-based) solutions, being polar, are immiscible with non-polar organic solvents (cooking oil, chloroform, toluene, hexane etc.) and form a two-phase system.
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Scheme 1 shows the schematic procedure of an electron diffraction experiment. A fast electron beam is generated in an electron gun, enters a diffraction chamber typically at a vacuum of 10 −7 mbar. The electron beam hits a perpendicular stream of a gaseous sample effusing from a nozzle of a small diameter (typically 0.2 mm).
In the gas phase at ultralow pressures, single-molecule experiments have been around for decades, but in the condensed phase only since 1989 with the work by W. E. Moerner and Lothar Kador. [3] One year later, Michel Orrit and Jacky Bernard were able to show also the detection of the absorption of single molecules by their fluorescence. [4]
Click chemistry is an approach to chemical synthesis that emphasizes efficiency, simplicity, selectivity, and modularity in chemical processes used to join molecular building blocks. It includes both the development and use of "click reactions", a set of simple, biocompatible chemical reactions that meet specific criteria like high yield, fast ...