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

Official URL: https://srj.uitm.edu.my/

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.

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Ismail, Normah
norismel@salam.uitm.edu.my
Shukor, Najihah
UNSPECIFIED
Samicho, Zainal
UNSPECIFIED
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: Universiti Teknologi MARA, Shah Alam > Research Management Centre (RMC)
Journal or Publication Title: Scientific Research Journal
UiTM Journal Collections: UiTM Journal > Scientific Research Journal (SRJ)
ISSN: 1675-7009
Volume: 10
Number: 1
Page Range: pp. 65-81
Keywords: silver catfish (Pangasius sutchi), gelatin, extraction time, functional properties, emulsifying, foaming
Date: 2013
URI: https://ir.uitm.edu.my/id/eprint/13043
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