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.