proton magnetic resonance การใช้

Proton magnetic resonance spectroscopy has shown that there is widespread neuronal loss even at the onset of MS, largely unrelated to inflammation.
When hydrogen is the target element, MRSI is also called 1H-nuclear magnetic resonance spectroscopic imaging and proton magnetic resonance spectroscopic imaging.
Axonal degeneration at CNS can be estimated by N-acetylaspartate to creatine ( NAA / Cr ) ratio, both measured by with proton magnetic resonance spectroscopy.
It has empirical formula C 20 H 25 NO 3 and a melting point of 249-250 癈 . The structure was determined to be a hetisine type diterpene by noting infrared spectrum absorption bands of 3405 cm " 1 ( OH ), 1718 ( C = O ), and 1650 ( C = C ), a proton magnetic resonance spectrum with " secondary ethyl, and methoxy groups . " Additional ultraviolet spectrum and carbon-13 NMR data, confirmed by high resolution mass spectrometry, completed the determination of the structure.