نتایج جستجو برای: triethanolamine
تعداد نتایج: 475 فیلتر نتایج به سال:
Galinobisuitite thin films of (Bi2S3)(PbS) were prepared using the chemical bath deposition technique (CBD). Thin films were prepared by a modified chemical deposition process by allowing the triethanolamine (TEA) complex of Bi(3+) and Pb(2+) to react with S(2)- ions, which are released slowly by the dissociation of the thiourea (TU) solution. The films are polycrystalline and the average cryst...
Homologous dicarboxyl dendritic amphiphiles-RCONHC(CH(3))(CH(2)CH(2)COOH)(2), 4(n); and ROCONHC(CH(3))(CH(2)CH(2)COOH)(2), 5(n), where R=n-C(n)H(2)(n)(+1) and n=13-22 carbon atoms-were synthesized. Critical micelle concentrations (CMCs) in aqueous triethanolamine solutions and at pH 7.4 were measured along with hemolytic activity (effective concentrations, EC(10)) in phosphate-buffered saline (...
The differences between the hydration of Portland cements with single and mixed sulfate carriers in presence triethanolamine (TEA) were investigated, possible mechanisms proposed. Without TEA, different types (gypsum, hemihydrate, anhydrite, mixture these) have a comparable process at same molar amount calcium sulfate. At TEA dosage 0.5 wt.%, sample three shows substantially stronger retardatio...
In this study, two-step surface modification of sawdust using triethanolamine (at 180 °C) and iodomethane 42 was performed to produce a novel quaternized biosorbent, TEA-I-SD. The characterization studies revealed significant morphological changes in the successful quaternization with nitrogen content 5.75%. highest vanadium removal (96.2%) achieved at pH 4 (dosage 1 g/L, initial concentration ...
A method for measuring sulfite residues in foods by using the modified Rankine apparatus and HPLC was developed. Sulfites released from foods by bubbling of nitrogen gas and heating for 15 minutes with an electric burner weRe absorbed in 1% triethanolamine solution and detected as sulfite ion by HPLC with a UV detector at 240 nm, using an anion exchange column, IonPac AS9-SC, with 1.8 mmol/L so...
Precursors to Group II metal aluminates (MAI2O4 , M=Mg, Ca, Ba, Sr) are synthesized from inexpensive starting materials including Group II metal oxides/hydroxides, Al(OH)3 , triethanolamine (TEA) and ethylene glycol, in a one-pot synthesis process. The precursors are soluble in common organic solvents and can be handled in moist air for a reasonable period of time. On pyrolysis in air to 1200 °...
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