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Ion induced microscopic mass spectrometry
(1985)
A microprobe analytical technique has been developed. It is based on mass spectrometric analysis of the ions desorbed from the impact area of a collimated microbeam of high energy heavy projectiles (84 MeV ^84Kr^+7). This ...
Microlocalization during ion beam analysis
(1985)
We have investigated three techniques for identifying microregions of the sample examined by an ion beam during analysis. These techniques involve 1) the detection of secondary electrons ejected from the sample during ion ...
A study of qualitative and quantitative aspects of particle desorption mass spectrometry
(1987)
The goal of this study has been to expand the analytical scope of ²⁵²Cf particle desorption mass spectrometry (PDMS). The technique has a unique set of features: simple spectra, usually with a predominant parent ion peak ...
Separation and equilibrium characterization of two diastereomeric multidentate ligand pairs for use as radiopharmaceuticals
(1989)
The multidentate ligand N,N'-ethylenebis[2-(o-hydroxyphenyl)- glycine] (EHPG) contains a mixture of racemic and meso forms of the ligand. Theoretical work has addressed the differences in the stabilities of the meso and ...
Enzymes in organic synthesis
(1988)
Immobilized glucose dehydrogenase from Bacillus sp. was found to be a practical catalyst for NAD (P) H regeneration. It is very stable at high temperatures. Coupled with an appropriate alcohol dehydrogenase, several compounds ...
The purification and characterization of the phosphotriesterase from Pseudomonas diminuta
(1989)
The phosphotriesterase from the soil bacterium Pseudomonas diminuta has been purified to homogeneity from two different expression systems using only three chromatographic steps. This represents the first total purification ...
Overproduction and utilization of enzymes in synthetic organic chemistry
(1989)
The utility of papain in the synthesis of peptides containing D or unusual amino acids has been demonstrated. A novel one-step synthesis of tripeptides has been developed using papain. The amidase activity of a number of ...
The X-ray crystal structure of bovine (gamma symbol)-carboxypeptidase A
(1986)
The structure of [gamma]-carboxypeptidase A from bovine pancreas has been determined by single-crystal X-ray crystallography at 2.0 [angstrom] with a final Residual R factor of 0.250. Multiple isomorphous replacement, an ...
Catalytic and mechanistic studies of some anionic transition metal carbonyl hydrides
(1986)
As PPN⁺ (bistriphenylphosphineimminium) salts the anionic metal hydrides HFeM(CO)₉⁻ (M = Cr, Mo, W) were shown to be olefin isomerization catalysts under mild conditions (25°C, fluorescent lighting) toward the conversion ...