PMID- 10820037
OWN - NLM
STAT- MEDLINE
DCOM- 20000828
LR  - 20190723
IS  - 0021-8561 (Print)
IS  - 0021-8561 (Linking)
VI  - 48
IP  - 5
DP  - 2000 May
TI  - Lipid oxidation in a chicken muscle model system: oxidative response of lipid 
      classes to iron ascorbate or methemoglobin catalysis.
PG  - 1421-6
AB  - Catalysis by iron ascorbate and activated methemoglobin generated different 
      oxidative responses in chicken muscle model systems. In iron ascorbate systems, 
      large increases in hydroperoxides and thiobarbituric acid-reactive substances 
      (TBARS) occurred during the initial stage of incubation. Thereafter, iron 
      ascorbate catalysis led to a slow increase in the oxidation of triacylglcyerol 
      (TG) and sarcoplasmic reticulum (SR) membrane lipids. By the end of incubation, 
      24, 36, and 32% of the initial content of n-3 fatty acids in free fatty acids, 
      TG, and SR single-lipid model systems catalyzed by iron ascorbate had been lost. 
      Reduced losses of n-3 fatty acids were observed in the SR and TG fractions (0 and 
      24%, respectively) when iron ascorbate model systems contained all three lipid 
      fractions (mix). Hydroperoxides and TBARS in model systems catalyzed by activated 
      methemoglobin were characterized by a lag phase during most of the incubation. 
      Consistent with their role as antioxidants, losses of alpha-tocopherol (42-49%), 
      gamma-tocopherol (36-42%), and protein sulfhydryls (41-52%) were observed in 
      model systems catalyzed by activated methemoglobin. SR and mix model systems were 
      30-50% slower to oxidize than TG model systems when activated methemoglobin 
      served as the catalytic agent.
FAU - Sista, R V
AU  - Sista RV
AD  - Center for Food Safety and Quality Enhancement, Department of Food Science and 
      Technology, University of Georgia, 1109 Experiment Street, Griffin, Georgia 
      30223, USA.
FAU - Erickson, M C
AU  - Erickson MC
FAU - Shewfelt, R L
AU  - Shewfelt RL
LA  - eng
PT  - Journal Article
PL  - United States
TA  - J Agric Food Chem
JT  - Journal of agricultural and food chemistry
JID - 0374755
RN  - 9008-37-1 (Methemoglobin)
RN  - E1UOL152H7 (Iron)
RN  - PQ6CK8PD0R (Ascorbic Acid)
SB  - IM
MH  - Animals
MH  - Ascorbic Acid/chemistry/*metabolism
MH  - Catalysis
MH  - Chickens
MH  - Iron/chemistry
MH  - *Lipid Metabolism
MH  - Methemoglobin/*metabolism
MH  - Muscle, Skeletal/*metabolism
MH  - Oxidation-Reduction
EDAT- 2000/05/23 09:00
MHDA- 2000/09/02 11:01
CRDT- 2000/05/23 09:00
PHST- 2000/05/23 09:00 [pubmed]
PHST- 2000/09/02 11:01 [medline]
PHST- 2000/05/23 09:00 [entrez]
AID - jf9908897 [pii]
AID - 10.1021/jf9908897 [doi]
PST - ppublish
SO  - J Agric Food Chem. 2000 May;48(5):1421-6. doi: 10.1021/jf9908897.