Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Joseph A. Gardella"'
Autor:
Alan M. Piwowar, Joseph A. Gardella
Publikováno v:
Analytical Chemistry. 79:4126-4134
A series of model systems of poly(dimethylsiloxane) (PDMS) of molecular mass 2400 Da and low polydispersity (1.09) were prepared using the Langmuir-Blodgett technique to investigate the effects of tertiary structure on the ion formation probability i
Autor:
Eleanor Coffey, Gaurav Sinha, Tammy M. Milillo, Gunwha Oh, Joseph A. Gardella, David C. Manns
Publikováno v:
Analytical Chemistry. 79:810-818
Publikováno v:
Analytical Chemistry. 77:3570-3578
Time-of-flight secondary ion mass spectrometry employing an SF5+ polyatomic primary ion source was utilized to obtain a series of in-depth profiles from PLLA/Pluronic-P104 (poly(ethylene oxide-co-propylene oxide) triblock copolymer) blends in attempt
Publikováno v:
Analytical Chemistry. 72:4585-4590
Results from time-of-flight secondary ion mass spectra (TOF-SIMS) of Langmuir-Blodgett monolayers of various isomers (isotactic and syndiotactic) of poly(methyl methacrylate) (PMMA) are reported. A detailed analysis of the repeating pattern of fragme
Publikováno v:
Analytical Chemistry. 64:1068-1075
The eight Argone Premium Coal Samples were analyzed by electron spectroscopy for chemical analysis (ESCA or XPS). The surface elemental compositions were determined. Quantities of elements are reported as percent surface atomic concentrations. Analys
Autor:
Tammy M. Milillo, Joseph A. Gardella
Publikováno v:
Analytical chemistry. 80(13)
Ordinary kriging and inverse distance weighted (IDW) are two interpolation methods for spatial analysis of data and are commonly used to analyze macroscopic spatial data in the fields of remote sensing, geography, and geology. In this study, these tw
Publikováno v:
Analytical chemistry. 80(9)
The detection of high-mass, nonstoichiometric, GaxAsy and InxPy secondary ion clusters using time-of-flight secondary ion mass spectrometry is reported for the first time. The GaxAsy and InxPy clusters are detected in both positive and negative ion s
Publikováno v:
Analytical Chemistry. 62:645A-661A
Publikováno v:
Analytical Chemistry. 62:949-956
The single most misleading aspect of structure elucidation of naturally occurring biopolymers lies in the removal and preparation of the sample for chemical and physical composition analysis. We present a method for the application of electron spectr
Autor:
Joseph A. Gardella, Michael B. Clark
Publikováno v:
Analytical Chemistry. 62:870-875
Traditionally, static secondary ion mass spectrometry (SIMS) is believed to yield qualitative information and very little quantitative information. A method to obtain quantitative molecular ion data from organic static SIMS analysis of L-DOPA and rel