title: Frozen storage stability of beef patties incorporated with extracts from ulam raja leaves (Cosmos caudatus).
abstract: In Malaysia, fresh ulam raja leaves (Cosmos caudatus) are eaten raw with rice. In this study, beef patties incorporated with extracts of ulam raja (UREX) and commercial green tea extract (GTE) added individually at 200 and 500 mg/kg were stored at -18°C for up to 10 weeks. Lipid oxidation, cooking yield, physicochemical properties, textural properties, proximate composition and sensory characteristics of the beef patties were compared between those incorporated with UREX, GTE and the control (pure beef patty). Incorporation of UREX or GTE at 500 mg/kg into beef patties reduced the extent of lipid oxidation significantly (P<0.05). UREX showed a strong lipid oxidation inhibitory effect, comparable with GTE. In addition, a significant improvement (P<0.05) in cooking yield and textural properties was also recorded. However, incorporation of UREX and GTE into beef patties showed no significant influence (P>0.05) on the colour, pH, proximate composition and overall sensory acceptability of the patties.
authors.affiliation: Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
authors.forename: S F S
authors.initials: SF
authors.lastname: Reihani
authors.affiliation: Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
authors.forename: Thuan-Chew
authors.initials: TC
authors.lastname: Tan
authors.affiliation: Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia.
authors.forename: Nurul
authors.initials: N
authors.lastname: Huda
authors.affiliation: Food Technology Division, School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia. Electronic address: azhar@usm.my.
authors.forename: Azhar Mat
authors.initials: AM
authors.lastname: Easa
mesh_terms: D000818:Animals; D019659:Asteraceae / Q000737:chemistry*; D002417:Cattle; D003296:Cooking; D005260:Female; D005503:Food Additives / Q000032:analysis*; D005519:Food Preservation / Q000295:instrumentation / Q000379:methods*; D061353:Food Storage; D006801:Humans; D008297:Male; D008461:Meat Products / Q000032:analysis*; D010936:Plant Extracts / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D013649:Taste; D055815:Young Adult
chemical_list: D005503:Food Additives; D010936:Plant Extracts
keywords: Beef patty; Frozen storage; Green tea extract; Ulam raja (Cosmos caudatus)