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Chelate complex of the Chen-Kao reaction starting from (1S,2S)-pseudoephedrine. The Chen-Kao reaction (named after Ko Kuei Chen and Chung-Hsi Kao, Madison, Wisconsin 1926) [1] [2] is a chemical method for determining the presence of pseudoephedrine, ephedrine, and similar phenylalkylamines. [3]
Otolith microchemical analysis is a technique used in fisheries management and fisheries biology to delineate stocks and characterize movements, and natal origin of fish. The concentrations of elements and isotopes in otoliths are compared to those in the water in which the fish inhabits in order to identify where it has been.
Assessment of transient evoked otoacoustic emissions (TEOAE) in an adult. An otoacoustic emission (OAE) is a sound that is generated from within the inner ear.Having been predicted by Austrian astrophysicist Thomas Gold in 1948, its existence was first demonstrated experimentally by British physicist David Kemp in 1978, [1] and otoacoustic emissions have since been shown to arise through a ...
An otolith (Ancient Greek: ὠτο-, ōto-ear + λῐ́θος, líthos, a stone), also called otoconium, statolith, or statoconium, is a calcium carbonate structure in the saccule or utricle of the inner ear, specifically in the vestibular system of vertebrates.
The journal is devoted to the prompt publication of original papers, both theoretical and experimental, that provide new information on any aspect of sound or vibration. According to the Journal Citation Reports, the journal has a 2022 impact factor of 4.7. [1]
After seven years as a judge on American Idol, it's Katy Perry's turn to face feedback — and her latest critic isn't holding back.. Over the weekend, musician Steven James shared his reaction to ...
We have an important announcement: Ina Garten's favorite cast iron pan is over 40% off. Now when Ina speaks, we listen. She is the queen (okay, the Contessa) of making life in the kitchen easy ...
The dislocation mechanism of the AE act (event) during the nucleation of a microcrack in metals with body-centered cubic (bcc) lattice. Acoustic emission (AE) is the phenomenon of radiation of acoustic (elastic) waves in solids that occurs when a material undergoes irreversible changes in its internal structure, for example as a result of crack formation or plastic deformation due to aging ...