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The ion-exchange and catalytic properties of titanium phosphates and mixed titanium-zirconium phosphates
(1980)
[alpha]-Titanium phosphate, Ti(HPO4)2 * H2O, has layered structure isomorphous with [alpha]-zirconium phosphate, Zr(HPO4)2 * H2O. Thus, solid solutions of the two compounds were prepared and their properties correlated ...
Characterization and electronic properties of transition-metal exchanged zirconium and titanium phosphate
(1980)
A series of transition-metal-ion forms of phosphates of quadrivalent elements having the general formula X^[IV]M(PO4)2*yH2O(S^[IV] = Zr or Ti; M = Cu(II), Co(II) and Ni(II)) have been characterized. The electronic absorption ...
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 and evaluation of the biological activity of analogues of pepstatin
(1980)
Synthesis of all four stereoisomers of the novel amino acid statine, 4-amino-3-hydroxy-6-methylhepatanoic acid, and alastatine, 4-amino-3-hydroxypentanoic acid has been accomplished. Several tripeptide analogues of pepstatin ...
Factors determining ion exchange selectivity : I. Aqueous K+-H+ exchange with [alpha]-zirconium phosphate. II. Gas-solid ion exchange reactions
(1980)
The heats of K^+ - H^+ exchange have been measured calorimetrically on three samples of zirconium phosphate of widely differing crystallinity. The more crystalline exchangers both exhibit exothermic reaction over the full ...
New synthetic reactions of enolates of [alpha]-amino acid derivatives
(1980)
Hydroxyalkylation and acylation reactions of lithium enolates of amino acid derivatives 11-13 were investigated. Extensive rearrangement of 11 occurred under the reaction conditions. The lithium enolate of 12 exhibited ...
Biomolecules containing the SAsR₂ functional group : a chemical and carcinostatic study
(1980)
Thio sugar and thio steroid esters of several dialkylarsinous acids have been prepared and characterized. Specifically, the syntheses of the following compounds have been investigated: 1-thio-2,3:5,6-di-O-isopropylidene ...
Ion-selective electrode potentiometry in protein-containing solutions
(1980)
The variations in the potentials of the sodium-selective glass-membrane and potassium-selective valinomycin-based electrodes in various concentrations of albumin were investigated. These protein solutions serve as a simple ...