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Now showing items 41-50 of 109
²⁵²Cf-plasma desorption mass spectrometry of chemically protected ribo- and deoxyribooligonucleotides
(1980)
A new method of determining the base sequence, the purity and the molecular weight of a chemically protected ribo- or deoxyribooligonucleotide is described. Using the method ²⁵²Cf-plasma desorption mass spectrometry positive ...
Synthesis in solid state chemistry : use of sol-gel and hydrothermal techniques for the preparation of molybdates and silicophosphates
(1986)
Several non-classical methods of synthesis were used for the preparation of transition metal molybdates and sodium zirconium silicophosphates. In addition to synthesizing new compounds in each group, the results were used ...
Rearrangements and catalytic activity of selected transition metal carbonyl complexes
(1986)
The cis-M(CO)4 (13CO)PR3 [double harpoon] trans-M(CO)4(13CO)PR3 CM = Cr, R = Et; M = W, R = OMe, Me, Et, i-Pr) isomerization reactions have been studied kinetically in cyclohexane-d12 by 13C NMR spectroscopy. These ...
Surface reactivity of strongly interacting alloys and its influence on their catalytic properties
(1988)
The intermetallic compounds of the Brewer-Engel type represent a unique case in novel heterogeneous catalyst systems. The components of these alloys are known to have altered electronic structures described as sharing of ...
The effect of the N-substituent in electrophilic substitution reactions with acyclic nitrogen substituted carbonyl compounds
(1986)
The regioselectivity in the deprotonation of ketimines was examined. The studies examined the effect of the base, the deprotonation temperature and the nitrogen substituent on the formation of azaallyllithium reagents from ...
Kinetic isotope effect studies of some carboxylic anhydrides useful as models for certain enzymatic processes
(1981)
Solvent and β-secondary kinetic isotope effects were used to study the hydrolysis mechanisms of some carboxylic anhydrides and a thiolester. The studies were carried out in order to obtain model system data useful in ...
Chemical and morphological investigations of perfluorosulfonate ionomers
(1988)
High-performance liquid chromatographic procedures were used to study the ion-exchange selectivities of perfluorosulfonate ionomers (PFSI's). HPLC columns were packed with PFSI-coated octadecyl-derivatized silica and were ...
Anion complexation by neutral Lewis acidic host molecules containing tin
(1989)
A family of synthetic host molecules have been prepared, ranging in structural complexity from spiro-annelated monocycles 16 to symmetric bicycles 12 and ditopic tricycles 14. The neutral host molecules contain either two ...
The formation, characterization, and reactivity of models for the active intermediates of horseradish peroxidase and cytochrome P-450 monoxygenases
(1988)
Combination of meso-[tetrakis(2,6-dichlorophenyl)porphinato]iron perchlorate with pentafluoroiodosobenzene, m-chloroperbenzoic acid, or ozone in acetonitrile at -35°C yields a green porphyrin-oxene adduct. This species, ...