Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Md. A. Mabud"'
Publikováno v:
Applied Biochemistry and Biotechnology. 30:303-312
A new strain of the fungusMorchella nov. ES-1 (ATCC 20951) that produces blue pigment in submerged culture has been isolated. The blue pigment was extracted by chloroform or ethyl acetate treatment. The crude extract when chromatographed yielded thre
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 100:209-265
Surface-induced dissociation (SID) of polyatomic ions is reviewed. Instrumentation is described, including hybrid, tandem quadrupole and tandem time-of-flight instruments built especially to study polyatomic ion—surface collision phenomena. In addi
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 69:277-284
Interactions of mass-selected doubly charged ions with a metal surface have been studied in a modified hybrid mass spectrometer. The primary ion is generated by electron impact upon toluene, mass-selected using a magnetic sector, and the products of
Publikováno v:
Journal of the American Chemical Society. 111:859-865
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 82:131-150
Reactive ion/surface collisions are shown to represent a common phenomenon when polyatomic ions of 20–60 eV energy collide with metal surfaces. Abstraction of one hydrogen atom is the usual reaction, although pick-up of up to four hydrogen atoms an
Publikováno v:
Journal of Chromatography A. 477:387-395
A method is presented for the determination of 2,4- and 2,6-toluenediamine (TDA) in aqueous extracts of polyurethane foams. Foam samples are extracted with methyl-tert.-butyl ether followed by back extraction into dilute hydrochloric acid. The method
Publikováno v:
Journal of the American Chemical Society. 109:7597-7602
Publikováno v:
Journal of the American Chemical Society. 110:1343-1346
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 67:285-294
Fragmentation of polyatomic ions upon collision with a metal surface was studied using a modified hybrid mass spectrometer. Daughter spectra of mass-analyzed parentions obtained upon collision with both solid and gaseous targets are compared. As in c
Publikováno v:
International Journal of Mass Spectrometry and Ion Processes. 67:295-303
Tandem mass spectrometry (MS/MS) is applied to the study of polyatomic ion/surface interactions. The incident and emergent beams are tracked in two distinct types of experiments: (i) those in which the mass-to-charge ratio for one of the beams is fix