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The Theoretical Calculations of Acid Dissociation Constant and Thermodynamic Properties of Glaysyl Aspartic Acid in aqueous solution at different Temperatures

سال انتشار: 1397
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 449
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شناسه ملی سند علمی:

ISPTC21_218

تاریخ نمایه سازی: 30 دی 1397

چکیده مقاله The Theoretical Calculations of Acid Dissociation Constant and Thermodynamic Properties of Glaysyl Aspartic Acid in aqueous solution at different Temperatures

In this research work, potentiometric technic was used to measure acidic dissociate constantof glycyl aspartic acid (GLY-ASP) at temperature 25, 30, 35, 40, 45°C and in 0.1 mol/l ionstrength of chloride sodium. Using this data, we calculated the thermodynamic properties ofGibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) GLY-ASP. All analyses on data werestudied in pH=1.5-11 and in the aqueous solution. Results indicates that the value of ΔGincreases by temperature growth regarding, and ΔS is negative and ΔH value is negative for thefirst and second ionization and positive for the third ionization.

کلیدواژه های The Theoretical Calculations of Acid Dissociation Constant and Thermodynamic Properties of Glaysyl Aspartic Acid in aqueous solution at different Temperatures:

نویسندگان مقاله The Theoretical Calculations of Acid Dissociation Constant and Thermodynamic Properties of Glaysyl Aspartic Acid in aqueous solution at different Temperatures

Fatemeh Zabihi

Department of Physic, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

Farhoush Kiani

Department of Chemistry, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol

Mojtaba Yaghobi

Department of Physic, Faculty of Science, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran

Seyed Ahmad Shahidi

Department of Food Science and Technology, College of Agriculture and Food Science, Ayatollah AmoliBranch, Islamic Azad University, Amol, Iran