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Comparative time-course study of aminoacyl- and dipeptidyl-resin hydrolysis
(1997-12-01)
The classic hydrolysis procedure for quantification of resin-bound aminoacyl and peptidyl groups with 12 N HCl: propionic acid was recvaluated by studying the influence of the nature of the resin and the resin-bound group. ...
Hydrolysis rates of TMOS catalyzed by oxalic acid and stimulated by ultrasound
(Kluwer Academic Publ, 1999-06-01)
A simple calorimetric method was employed to study the kinetics of the hydrolysis of the solventless TMOS-water mixtures, under ultrasound stimulation, as a function of the concentration of oxalic acid. The reaction rates ...
A study of the hydrolysis pathway in oxalic acid catalyzed reacting TMOS-water mixtures under ultrasound stimulation
(Kluwer Academic Publ, 2000-04-01)
The hydrolysis of TMOS in oxalic acid catalyzed reacting TMOS-water mixtures, under ultrasound stimulation, was studied by fitting a simplified dissolution and reaction modeling for samples, the hydrolysis rate of which ...
Post consumer pet depolymerization by acid hydrolysis
(Taylor & Francis Inc, 2007-02-01)
The reaction of post-consumer poly(ethylene terephthalate) with aqueous solutions of sulfuric acid 7.5M was investigated in terms of temperature, time and particle size. The reaction extent reached 80% in four days at 100 ...
Effects of the water quantity on the solventless TEOS hydrolysis under ultrasound stimulation
(Kluwer Academic Publ, 2000-01-01)
The acid hydrolysis under ultrasound stimulation of solventless tetraethoxysilane(TEOS)-water mixtures was studied at 40 degrees C, by means of a heat flux calorimetric method, as a function of the initial water/TEOS molar ...
Production and physicochemical properties of resistant starch from hydrolysed wrinkled pea starch
(Wiley-Blackwell, 2011-11-01)
The content and physicochemical properties of resistant starches (RS) from wrinkled pea starch obtained by different molecular mass reduction processes were evaluated. Native and gelatinised starches were submitted to acid ...
Gelatinization properties of native starches and their Naegeli dextrins
(Springer, 2011-12-01)
Cassava, potato, sweet potato, and Peruvian carrot starches were hydrolyzed with 15% v/v sulfuric acid solution for up to 30 days. Naegeli dextrins obtained from 1, 3, 6, 12, and 30 days were evaluated using differential ...
Optimization of acid hydrolysis from the hemicellulosic fraction of Eucalyptus grandis residue using response surface methodology
(Elsevier B.V., 2007-01-01)
Biotechnological conversion of biomass into fuels and chemicals requires hydrolysis of the polysaccharide fraction into monomeric sugars. Hydrolysis can be performed enzymatically and with dilute or concentrate mineral ...
Effects of HCl on the ultrasound catalyzed TEOS hydrolysis as determined by a calorimetric study
(1996-11-01)
The acid catalyzed and ultrasound stimulated hydrolysis of solventless tetraethoxysilane-water mixtures was studied at 39°C as a function of HCl added to the mixtures (log[HCl]-1 ranged from 0.8 to 2.0), The reaction was ...
Solid-state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment
(2013-02-05)
Plasma treatments were applied on the surface of postconsumer polyethylene terephthalate (PET) bottles to increase their wettability and hasten the subsequent hydrolysis process. Sixty-four treatments were tested by varying ...