Effects of extraction time on the functional properties of silver catfish (Pangasius sutchi) skin gelatin / Normah Ismail, Najihah Shukor and Zainal Samicho

Ismail, Normah and Shukor, Najihah and Samicho, Zainal (2013) Effects of extraction time on the functional properties of silver catfish (Pangasius sutchi) skin gelatin / Normah Ismail, Najihah Shukor and Zainal Samicho. Scientific Research Journal, 10 (1). pp. 65-81. ISSN 1675-7009

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Abstract

Silver catfish (Pangasius sutchi) skin gelatin was extracted to determine the effects of extraction time on the functional properties of the gelatin in terms of solubility, protein solubility as a function of pH and sodium chloride concentration, emulsifying capacity and stability, water holding capacity, fat binding capacities and foaming properties. Silver catfish skins were washed in sodium chloride (NaCl) solution prior to pre-treatment in sodium hydroxide (NaOH) and acetic acid solution. Gelatin was extracted at 50ºC for 6, 8, 10 and 12 hours extraction time followed by freeze drying. The extraction of silver catfish skin gelatin at 50 ºC for 12 hours was more effective than extraction at 6, 8 and 10 hours where the gelatin was characterized by higher emulsifying capacity (52.63%), emulsifying stability (47.83%), water holding capacity (31.78 mL/g), fat binding capacities (54.76%), foaming capacity (41.47 mL) and foaming stability (56.42%) than gelatins extracted at other extraction time. The longer the extraction time, the better the functional properties of the gelatin. Based on its good functional properties, silver catfish skin gelatin may be useful in various food applications such as soups, sauces and gravies.

Item Type: Article
Creators:
CreatorsID Num.
Ismail, Normahnorismel@salam.uitm.edu.my
Shukor, NajihahUNSPECIFIED
Samicho, ZainalUNSPECIFIED
Subjects: Q Science > QD Chemistry > Physical and theoretical chemistry > Foam
Q Science > QD Chemistry > Extraction (Chemistry)
Q Science > QL Zoology > Chordates. Vertebrates > Catfishes. By order-Siluriformes
Q Science > QL Zoology > Chordates. Vertebrates > Catfishes. By family-Simenchelyidae
Q Science > QP Physiology > Gelatin
T Technology > TP Chemical technology > Chemical engineering > Emulsions
Divisions: Research Management Institute (RMI)
Journal or Publication Title: Scientific Research Journal
ISSN: 1675-7009
Volume: 10
Number: 1
Page Range: pp. 65-81
Item ID: 13043
Uncontrolled Keywords: silver catfish (Pangasius sutchi), gelatin, extraction time, functional properties, emulsifying, foaming
Last Modified: 30 May 2016 04:09
Depositing User: Staf Pendigitalan 1
URI: http://ir.uitm.edu.my/id/eprint/13043

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