نتایج جستجو برای: organically modified montmorillonite ommt
تعداد نتایج: 254933 فیلتر نتایج به سال:
The magnetic alignment of organically modified montmorillonite platelets in magnetic fields is studied using small-angle X-ray scattering. When suspended in non-mesogenic solvents such as dodecanol the platelets are found to align parallel to the magnetic field due to the negative anisotropy of the magnetic susceptibility of the montmorillonite. Alignment of the clay in the nematic phase of 5CB...
Atrazine (A) is one of the most applied herbicides and has a negative impact on environment health. Density functional theory (DFT) experimental methods were used in study immobilization atrazine two smectites, montmorillonite (Mt) beidellite (Bd), as well their organically modified structures. Four systems examined: A-Mt A-Bd, structures by tetramethylphosphonium cation (TMP), A-TMP-Mt A-TMP-B...
The effect of clay and chemical cross-linking on the dynamic mechanical properties polyurethane reinforced with different concentrations organically modified montmorillonite is investigated in this study. matrix constituted polytetrahydrofuran soft segment 4,4′-methylenebis(phenyl isocyanate) hard segment. Glycerin was used as crosslinking agent, while Cloisite 30B reinforcing filler. nanocompo...
BACKGROUND We evaluated the expression of human trophoblastic cell-surface marker (Trop-2) and the potential of hRS7 - a humanized monoclonal anti-Trop-2 antibody - as a therapeutic strategy against treatment-refractory human uterine (UMMT) and ovarian (OMMT) carcinosarcoma cell lines. MATERIALS AND METHODS Trop-2 expression was evaluated by immunohistochemistry (IHC) in paraffin-embedded tum...
Organically modified silica coatings were prepared on metal nanowires using a variety of silicon alkoxides with different functional groups (i.e., carboxyl groups, polyethylene oxide, cyano, dihydroimidazole, and hexyl linkers). Organically modified silicas were deposited onto the surface of 6-μm-long, ∼300-nm-wide, cylindrical metal nanowires in suspension by the hydrolysis and polycondensatio...
Heavy metals decrease plant growth due to disorder in enzyme activities and destroying of protein structure. Since corn is an important crop in human and poultry nutrition, in this greenhouse experiment, the effect of modified polyacrylamide and montmorillonite on growth parameters and chlorophyll fluorescence of corn (Zea mays L.) grown in two polluted soils with Cd and Pb (sandy and sandy loa...
This research was conducted to study the effect of natural and polyacrylamide-modified montmorillonite on the sorption of Cd from aqueous solutions. The sorption of Cd on the sorbents was studied as a function of pH (Cd concentration: 10 mg L-1) in the range of 4-8.5, and as a function of metal concentration (Cd concentration in the range of 1-10 mgL-1) using a 24h batch equilibration. Experime...
Abstract The most common polymeric nanocomposites are constituted of organically-modified clays. Generally, these organic modifiers based on quaternary ammonium salts. These systems have as disadvantage the low thermal resistance its under processing. Ionic liquids (IL) with different molecular structures can be used modifier in lamellar clays-based nanocomposites, being promising not only to i...
The present study used two versions of a spatial list learning (SLL) paradigm to examine the effects of increased cognitive load on visuospatial working memory processes in young and old beagle dogs. In the first experiment, young, and a select group of old dogs were first presented with one item, then two, and then three, and were rewarded for responding to the novel position. The dogs were ab...
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