Positive-ion mass spectral fragmentations of seven mycosporine-like amino acids (MAAs) are reported and discussed. The MAAs studied are small compounds composed of a cycloheximine ring substituted with amino acid or amino alcohol units. Techniques used include electron impact (EI) and electrospray io...
Upthagrove AL, Hackett M and Nelson WL (1999b) Mass spectral fragmentation pathways of propranolol related -fluorinated amines studied by electrospray and electron impact ioniza- tion. Rapid Commun Mass Spectrom 13:1671-1679.L. Alana, Upthagrove, Murray Hackett, Wendel L. Nelson, Mass ...
Equation1was used for the MW (M) calculation of the multiply charged species: $$ \frac{m}{z}\cdotp z-\left[\left(\mathrm{atomic}\ \mathrm{mass}\ \mathrm{of}\ \mathrm{charge}\ \mathrm{carrier}\ \left({}^1\mathrm{H}\ \mathrm{or}\ {}^{23}\mathrm{Na}\right)-\mathrm{electr...
Moreover, protein ions in higher charge states generally dissociate more extensively than ions in lower charge states in widely-used ion fragmentation techniques such as collision induced dissociation (CID), electron transfer dissociation (ETD), and electron capture dissociation (ECD) [[4], [5], ...
Energy Dispersive X-ray (EDX) coupled to a scanning electron microscope confirmed the calcium deposition on the surface of the PA-6/CL nanofibers and indicated an increase of the deposited calcium as four times greater than that deposited calcium on a PA-6 fiber mat. Goes and co-workers [...
Oesterhelt, "2-Alkylimidazoline derivative to control fatty acid fragmentation upon electron impact and electrospray ionization", J. Mass Spectrom. 33, 461 (1998).Vetter, W.; Meister, W.; Oeaterhelt, G. 2-Alkylimidazoline derivative to control fatty acid fragmentation upon electron impact and ...
Owing to the strongly basic character and the cyclic structure of this derivative, strong stabilization of the charge on the ionized group is obtained so that extensive radical and charge-remote fragmentation of the chain can be achieved with electron impact and electrospray ionization. 1998 John ...
The morphology of the NPs and the fiber meshes was assessed under scanning electron microscopy (SEM) (FEI FEG-Quanta 450 instrument, Field Electron and Ion Company, Hillsboro, OR, USA). The samples were sputtered with gold (Gold Edwards SP150B, UK) before analysis. ImageJ software (version...