scholarly journals A new matrix system in fast atom bombardment mass spectrometry of prenylated- and geranylated-phenolic compounds.

1990 ◽  
Vol 38 (2) ◽  
pp. 77-85 ◽  
Author(s):  
Mitsuo Takayama ◽  
Toshio Fukai ◽  
Yoshio Hano ◽  
Taro Nomura
Keyword(s):  
Mass Spectrometry ◽  
Phenolic Compounds ◽  
Fast Atom Bombardment ◽  
Matrix System

Effects of Doping on the Electrochemical and Electrical Properties of Poly(2,5-di(2-thienyl)pyrrole)

1999 ◽  
Vol 64 (8) ◽  
pp. 1357-1368 ◽  
Author(s):  
Enric Brillas ◽  
José Carrasco ◽  
Ramon Oliver ◽  
Francesc Estrany ◽  
Víctor Ruiz
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Oxidation Potential ◽  
Ethanolic Solution ◽  
Pt Electrode ◽  
Reversible Process ◽  
Oxidation Potentials ◽  
Lower Productivity ◽  
Polymeric Chains ◽  
Linear Molecules

The electropolymerization of 2,5-di(2-(thienyl)pyrrole) (SNS) on a Pt electrode from ethanolic solution with LiClO4 or LiCl as electrolyte has been studied by cyclic voltammetry (CV) and chronoamperometry (CA). In both media, a quasi-reversible process has been indicated by CV, reversing the scan at low oxidation potentials. Under these conditions, reducible positive charges formed in both oxidized polymers are compensated by the entrance of anions from solution. Elemental analysis reveals that polymers generated at a low oxidation potential by CA contain a 21.03% (w/w) of ClO4- or a 9.56% (w/w) of Cl-. The poly(SNS) doped with Cl- presents higher proportion of reducible positive charges, higher polymerization charge and lower productivity. A much higher electrical conductivity, however, has been found for the poly(SNS) doped with ClO4-. Both polymers are soluble in DMSO, acetone and methanol. The dimer, trimer, tetramer and pentamer have been detected as soluble and neutral linear oligomers by mass spectrometry-fast atom bombardment. The analysis of polymers by infrared spectroscopy confirms the predominant formation of linear molecules with α-α linkages between monomeric units. A condensation mechanism involving one-electron oxidation of all electrogenerated linear and neutral polymeric chains is proposed to explain the SNS electropolymerization.

scholarly journals A revised primary structure for neocarzinostatin based on fast atom bombardment and gas chromatographic-mass spectrometry.

1984 ◽  
Vol 259 (17) ◽  
pp. 10801-10806
Author(s):  
B W Gibson ◽  
W C Herlihy ◽  
T S Samy ◽  
K S Hahm ◽  
H Maeda ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Primary Structure ◽  
Fast Atom Bombardment ◽  
Chromatographic Mass

scholarly journals Assignment of disulfide bonds in proteins by fast atom bombardment mass spectrometry.

1987 ◽  
Vol 262 (6) ◽  
pp. 2507-2513
Author(s):  
R. Yazdanparast ◽  
P.C. Andrews ◽  
D.L. Smith ◽  
J.E. Dixon
Keyword(s):  
Mass Spectrometry ◽  
Disulfide Bonds ◽  
Fast Atom Bombardment

scholarly journals Proton NMR and fast-atom bombardment mass spectrometry analysis of the melanoma-associated ganglioside 9-O-acetyl-GD3.

1985 ◽  
Vol 260 (27) ◽  
pp. 14556-14563 ◽  
Author(s):  
J Thurin ◽  
M Herlyn ◽  
O Hindsgaul ◽  
N Strömberg ◽  
K A Karlsson ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fast Atom Bombardment ◽  
Proton Nmr ◽  
Mass Spectrometry Analysis ◽  
Spectrometry Analysis
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