The immobilization of Candida antarctica lipase B (CALB) was performed by physical adsorption on both neat and organo-modified forms of sepiolite and montmorillonite. The influence of different parameters, e.g., solvent, enzyme loading, cross-linking, and type of clay support, on immobilization efficiency and catalyst hydrolytic activity has been investigated. The highest hydrolytic activities ...

La gestion durable des terres reste une problématique majeure dans le contexte agricole du Burkina Faso. Cette étude a été conduite afin d’évaluer les effets de la combinaison différentes techniques fertilité sol sur développement 2 légumineuses, à l’Ouest Pour ce faire, un dispositif trois facteurs (Travail sol, système culture et fertilisation) 4 répétitions mis en place. Le facteur travail é...

The paper discusses the issues of interaction organic matter and siliceous-carbonate mineral matrix in unconventional reservoirs Upper Devonian Domanik Formation Kama Depression Volga-Ural Basin. is composed organic-rich low-permeability rocks. Lithological geochemical peculiarities rocks were studied using light microscopy, X-ray diffraction analysis (XRD), scanning electronic microscopy (SEM)...

An easy method was used to modify the Cloisite Na+ with different cationic surfactants. To prevent the damages in the clay crystal structure, the process was taken without acid activation. The organo-modified montmorillonite (MMT) were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermal analysis (TG/DTG), field emission scanning electron microscopy ...

Active Al, Fe and Si (i.e., oxalate extractable fraction: Alo, Feo, Sio) strongly affect soil physical, chemical biological properties. This study examined the pedogenic factors affecting Feo Sio contents across a weathering sequence in Cameroon volcanic line. We investigated B horizon (∼50-cm depth) from 26 soils formed basaltic materials at different elevations (110–2570 m) incorporating wide...

The self-assembly of low molecular weight gelators confined within the nano-scale interlayer space of organo-montmorillonite is likely to be different from that under normal conditions (bulk space). Four kinds of gelators, 1-methyl-2,4-bis(N'-n-octadecylureido) benzene (MBB18), 1-methyl-2,4-bis(N'-n-dodecylureido)benzene (MBB12), bis(4'-stearamido phenyl) methane (BSM18) and bis(4'-octanamido p...

Biocide programs have become necessary in most fine paper manufacturing circuits, as drastic reduction of fresh water consumption in the industry enhances microbial development. Depending on their chemical nature, biocides may interfere with typical wet-end chemistry additives and furnish. A reference wet-end chemistry was set (including fixing aid, dry strength aid, sizing agent, and retention...