Doubly-protonated bradykinin (RPPGFSPFR) and an angiotensin III analogue (RVYIFPF) were subjected to hydrogen/deuterium (H/D) exchange with CD(3)OD in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer. A bimodal distribution of deuterium incorporation was present for bradykinin after H/D exchange for 90 s at a CD(3)OD pressure of 4 x 10(-7) Torr, indicating the existence of...

In this study, a high sampling rate data acquisition system with the ability to provide timestamp, pulse shape information, and waveform simultaneously under sub megahertz counting was developed for radiation diagnostics magnetic confinement nuclear fusion plasma research. The testing of condition using real signals performed in an accelerator-based deuterium-deuterium neutron source (Fast Neut...

introducing and removing amino acid blocking groups. Section II deals with coupling methods, and several papers take up the problem of racem-ization. Especially interesting is a report of the use of a gas chromatographic technique to compare the degree of racemization by various commonly used coupling techniques. The third section discusses the occurrence of "unnatural" amino acids and special ...

We report a search for d∗ dibaryon production by double-radiative capture on pionic deuterium. The experiment was conducted at the TRIUMF cyclotron using the RMC cylindrical pair spectrometer, and detected γ-ray coincidences following pion stops in liquid deuterium. We found no evidence for narrow dibaryons, and obtained a branching ratio upper limit, BR < 6.7×10 (90% C.L.), for narrow d∗ produ...