and pentaethylenehexamine, hexamine, the adsorption isin the form of a monolayer at pH 3 and multilayers at pH 7 and 10.Hence, there is a pH driven transition from monolayer to multilayeradsorption, which shifts from low pH to higher pH as the oligoaminemolecular weight increases from tetramine...
Many suitable reactants are listed and examples describe additives prepared by esterifying polyisobutenyl maleic anhydride with (2) pentaerythritol, the product being neutralized with pentaethylene hexamine, (4) trimethylolpropane, (5) pentaerythritol, (6) sorbitol, (9) t-butanol, (11) ...
As a result of their efforts, a catalyst TON up to 9900 was reached employing [Ru-MACHO-BH] and pentaethylenehexamine (PEHA) in a biphasic system suitable to be reused four times. In addition, Prakash and co-workers developed a protocol where solid supported amines could be employed as ...
In particular, as was shown in [144,146], the quantitative NMR study of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, and pentaethylenehexamine-based PIB-SIs is hindered by hydrogen bonding between the polyamine linker and the succinimide carbonyls; this problem remains critical for ...
Chemicals and Reagents ACE enzyme (from rabbit lung), hippuryl-histidyl-leucine (HHL), hippuric acid (HA), captopril, zinc chloride, tetramethylmurexide and hexamine/HCl were purchased from Sigma-Aldrich (Subang Jaya, Selangor, Malaysia). Rosmarinic acid (RA), Sinensetin (SIN), eupatorin (EUP...