- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
ASSESSING SOME OF PHYSIOCHEMICAL AND FUNCTIONAL CHARACTERSTICS OF ALKALI PREPARED CHITOSAN FROM SHRIMPS SHELLS | ||
| The Iraqi Journal of Agricultural Science | ||
| Article 1, Volume 40, Issue 4, 2009, Pages 63-75 | ||
| Authors | ||
| Inas M. Khaleel; Dhuha D. Salman | ||
| Abstract | ||
| The physiochemical characteristics included: Moisture, Ash, Nitrogen, Refractive index, Specific rotation, Density, Viscosity, Solubility, molecular weight, Degree of Deacetylation, Optimum wave length and Functional properties like fat and water binding capacity were studied for two types of chitosan designated as A and B that prepared from shrimp shells. The first product prepared by treatment of chitin with alkaline solution at 100 Cْ / 4 hour and the second for 20 hour. The yield of chitosan A and B were 72.8 and 69.8% respectively as dry weight of chitin. The moisture content for both types A and B was 7% and 5.6% and 0.74 and 0.88% ash respectively. It was observed that a relationship is existed between physiochemical and functional characteristics for each type of chitosan.The nitrogen content , solubility, water and fat binding capacity increased with higher rate of Deacetylation Offset by a decrease in molecular weight and viscosity. The degree of Deacetylation for chitosan A 81.4% and chitosan B 89.8% the nitrogen content for both types A and B were 1.92 and 2.93% respectively. A highly viscosity showed for chitosan A being 93.7 centipoise compared with low viscosity for chitosan B (61.1 centipoise ).The molecular weight for chitosan A and B were 1115kDa and 720kDa respectively. A maximum absorbency was shown for chitosan A was at 340 nm and was at 310 nm for chitosan B.The chitosan B had a higher solubility in 1% acetic acid solution (100%) compared with 60.87% for chitosan A .The chitosan B had a higher capability for water binding being 788% compared with 621.5% for chitosan A . There was a difference in fat binding ability for both types of chitosan with source of oil. The fat binding capacity for chitosan A ranged between 426-665% while 400-678% for chitosan B. The later has a higher ability for fat binding compared with chitosan A except for olive oil. | ||
|
Statistics Article View: 87 PDF Download: 66 |
||