| SY | spectroscopy; syphilis, syphilitic |
|---|---|
| TOCSY | total correlation spectroscopy |
| TQFCOSY | triple-quantum filtered correlated spectroscopy |
| UPS | ultraviolet photoelectron spectroscopy; uninterruptible power supply; uroporphyrinogen synthetase; u... |
| XPS | x-ray photoemission spectroscopy |