ΔΙΗΛΕΚΤΡΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΚΑΤΑΣΤΑΣΗΣ ΤΟΥ ΝΕΡΟΥ ΣΕ ΥΔΑΤΙΚΑ ΔΙΑΛΥΜΑΤΑ ΚΑΙ ΥΔΑΤΩΜΕΝΑ ΣΤΕΡΕΑ ΔΕΙΓΜΑΤΑ ΜΟΝΟ-ΚΑΙ ΔΙ-ΣΑΚΧΑΡΙΤΩΝ

BY THE USE OF THE DEPOLARISATION THERMOCURRENT METHOD, A STUDY WAS MADE OF THE DIELECTRIC BEHAVIOUR OF FROZEN AQUEOUS SOLUTIONS OF THE MONOSACCHARIDES GLUCOSE, GALACTOSE, MANNOSE, RIBOSE, AND ARABINOSE AND THE DISACCHARIDES CELLOBIOSE, LACTOSE, AND MALTOSE, IN THE TEMPERATURE REGION OF 80-300K AND CONCENTRATIONS BETWEEN 0 .0003-15 MOL/LT, AND OF THE HYDRATED SOLID SAMPLES OF GALACTOSE AND MALTOSE IN THE RANGE OF HYDRATION H=0.8-20.2% AND THE SAME TEMPERATURE REGION THE DIM WAS TO GAIN INFORMATION ON THE STATE OF WATER, ON THE HYDRATION MECHANISM AND THE NATURE OF THE HYDRATION POSITIONS. A SYSTEMATIC STUDY OF THE L.T REGION (100- 160K) SHOWED THAT SUGAR SOLUTIONS CAN BE DIVIDED INTO TWO CATEGORIES. SOLUTIONS OF GLUCOSE, GALACTOSE AND MANNOSE HAVE SIMILAR BEHAVIOUR AND ARE CHARACTERIZED BY A CONTINUOUS TRANSITION FROM BOUND WATER TO FREE WATER, FOR CONCENTRATIONS UP TO 0.7 MOL/LT, AND BY BOND WATER ALONE FOR HIGHER CONCENTRATIONS. SOLUTIONS RIBOSE, ARABINOSE, CELLOBIOSE, LACTOSE, MALTOSE ARE CHARACTERISED BY THE PRESENCE OF TWO DISTINCT KINDS OF WATER MOLECULES, THOSE OF BOUND AND FREE WATER AND DIFFER IN THE EXTEND OF HYDRATION. IN SOLID SAMPLES OF GALACTOSE AND MALTOSE, THE LOW TEMPERATURE REGION D.T.C WAS ATTRIBUTED TO THE REORIENTATION OF BOUND WATER MOLECULES.

Grantor dc:publisher

National Technical University of Athens (NTUA)

Year dc:date

1986

Author dc:creator

• Νταουκάκη- Διαμάντη, Δέσποινα

• Activation energies
• BOUND WATER
• Carbohydrate
• Conformation
• D.T.C {DEPOLARISATION THERMOCURRENT}
• DIELECTRIC
• DIELECTRIC CONSTANT
• DIELECTRIC LOSS
• FREE WATER
• Relaxation
• ΔΕΣΜΙΟ ΝΕΡΟ
• Διαμόρφωση
• Διηλεκτρικές απώλειες
• Διηλεκτρική αποκατάσταση
• Διηλεκτρική σταθερά
• ΕΛΕΥΘΕΡΟ ΝΕΡΟ
• Ενέργεια ενεργοποίησης
• Θερμορεύματα αποπόλωσης
• Υδατάνθρακες
• Φυσικές Επιστήμες
• Φυσική
• Natural Sciences
• Physical Sciences

Language dc:language

gre

Identifier

10.12681/eadd/0004

OAI identifier oai:identifier

oai:10442/0004