Stabilization of multimeric enzymes: Strategies to prevent subunit dissociation

The presence of basic centers in some oxides has been recognized for a long time as being important in catalysis [1-4]. Usually both basic and acid sites exist simultaneously. The two centers may work independently or in a concerted way. For instance, in alcohol transformation, dehydration is favored on acidic sites and dehydrogenation on basic centers [3,5]. A large variety of materials are cited as having basic character. They include single-metal oxides (MgO, CaO, ZnO), supported alkali metals (Na/MgO, K/K2CO3), mixed-metal oxides (MgO-A12O3, ZnO-SiO2, MgO-TiO2), zeolites (X and Y saturated with alkaline cations of low electronegativity), hydrotalcite-type anionic clays, asbestoslike materials, carbon-supported basic catalysts, and basic organic resins. ∗ Present address: 16 rue Francois Gillet, 69003 Lyon, France.

Basic zeolites : Characterization and uses in adsorption and catalysis

https://repositorium.sdum.uminho.pt/bitstream/1822/37907/1/document_18186_1.pdf

Structural and functional stabilization of protein entities: state-of-the-art.

We investigated quantitatively the solubility properties of a number of unsubstituted metal phthalocyanines with various metal atoms such as Co, Cu, Fe, Mg, Mn, Ni, Sn, and Zn. We studied three categories of solvents: conventional solvents, ionic liquids, and acids. The conventional liquids comprised 20 typical representatives from acetone to toluene. We tested two ionic liquids and five acids. For each solution we measured the molar absorption coefficient and the saturation concentration (or estimated these values if the solubility was too low). The absorption coefficients and saturation concentrations were derived from UV–vis absorption measurements of the Q-band. The solution spectra are presented and discussed as well as the chemical properties (stability) of the solutions.

Solubility Properties of Unsubstituted Metal Phthalocyanines in Different Types of Solvents

W. Gunsser

Papers

The determination of effective diffusion coefficients in a polysaccharide matrix used for the immobilization of biocatalysts

Structure and electrical conductivity of TCNQ-2,3,7,8-tetramethoxychalcogenanthrene complexes

Formation of Iron Clusters in Zeolites with Different Supercage Sizes

Synthesis and magnetic properties of transition metal cyclotetraphosphates M2P4O12 (M = Mn, Co, Ni, Cu)

Examination of the adsorption of hydrocarbons at low coverage on faujasite zeolites