Thermodynamic Properties of Water Adsorption on Gaplek Flour Fortified with Red Bead Tree Seed
Journal Title: Molekul - Year 2018, Vol 13, Issue 2
Abstract
The moisture sorption isotherm data of gaplek flour fortified with red bead tree seed stored in a chamber, the relative humidity of chamber ranging from 10% to 97% regulated using a saturated salt solution, was determined at three temperatures 25°, 35°, and 45 °C. The experimental data used to determine the thermodynamic functions were isosteric heat of sorption, sorption entropy, and free energy changes. The sorption isosteric heats were determined by the application of the Clausius–Clapeyron equation. Isosteric heats of adsorption increased to maximum level and then declined with increase of moisture content. Adsorption entropy increased to maximum level and then declined with the increase of moisture content. The free energy changes increased with increase in moisture content. The spreading pressure increased with increasing water activity.
Authors and Affiliations
Margareta Novian Cahyanti, Alvama Pattiserlihun
STUDY ON THE FENTON REACTION FOR DEGRADATION OF REMAZOL RED B IN TEXTILE WASTE INDUSTRY
Remazol Red B is a reactive dye that is often used in the textile industry. The dye can cause serious problems in the environmental / water because it is difficult to be degraded by microorganisms. Decolorization of reac...
Pyrolysis Process of Mixed Polypropylene (PP) and High-Density Polyethylene (HDPE) Waste with Natural Zeolite as Catalyst
The reactor of the experiment was made from stainless steel with the diameter of 25 cm and the height of 30 cm. The liquid petroleum gas was used as a fuel in the reactor. The reactor was connected by the thermocouple t...
The Age Dependent Activities of Digestive Enzymes in Rasbora, Rasbora lateristriata Blkr., (Pisces: Cyprinidae)
This study was to evaluate the digestive enzyme activity included a total protease, trypsin, chymotrypsin, lipase, amylase, cellulase and alkaline phosphatase in Rasbora. This research was carried out using three differ...
RESISTANCE LEVEL OF Pseudomonas stutzeri AGAINST MERCURY AND ITS ABILITY IN PRODUCTION OF MERCURY REDUCTASE ENZYME
Mercury reductase is an enzyme that is able to reduce Hg2+ to Hg0 non toxic. This enzyme is usually produced by mercury resistant bacteria. The research wanted to determine the resistance of indigenous Pseudomonas stutze...
THE INFLUENCES OF POWER VARIATIONS ON SELECTIVITY OF SYNTHESIS REACTION OF 2’-HYDROXYCHALCONE ANALOGUE UNDER MICROWAVE IRRADIATION
Some 2’-hydroxychalcone analogues have been widely used as an intermediate to synthesize various heterocyclic compounds, such as flavanones, flavanonols, flavones, flavonols and others. The heterocyclic compounds are als...