Content List
•Introduction
•Taste perception
•Smell perception
•Chemical Reaction
•Off flavor Development During freezing storage
•Flavor compounds in frozen foods
•Components of FlavorFrozen food.
•FlavorDevelopment
•Mechanism of FlavorFormation
•Frozen Foods in market
INTRODUCTION
•FLAVOR
compounds will be formed
to improve the flavorof starting materials
To gain optimum flavorduring processing.
Maintain the Flavorquality during storage.
Development of flavorprecursors during processing
•Importance of FLAVOR IN FOOD ACCEPTABILITY
•cultural acceptability, food safety, and ability to promote nutritional status—which
encompasses both utilization (referring to the biological uptake of nutrients, which is
dependent on health status) and the nutritional quality of foods (including medically
appropriate foods).
•COMPONENTS OF FLAVOR : ( Taste, Smell, and Texture )
Taste Perception :
•TastSensation: sweet, sour / acid, salt, bitter, astringency, metallic, hot, cooling,
and umami.
•Salty taste caused by inorganic salts( sodium and potassium chloride)
•Sweetness is produced by sugars (glucose, fructose, ribose)
•L-amino acids(glycine,alanine,serine,threonine)
•Peptides(anserine and carnosine and the L amino acids histidine )
•Role of taste buds in taste perception.
Smell Perception
•Detection odorous molecules by olfactory receptors .
•Interaction of aroma compoudswith nasal receptors-
Chemical Reactions Responsible for flavors
1.Maillard Reaction
2.Lipid Oxidation
Off FlavorDevelopment During Freezing Storage
A.Change in FlavorOf Frozen Foods Associated To Cell Damage.
B.Changes in FlavorOf Frozen Foods Associated To Lipids.
C.Changes in FlavorOf Frozen Associated To proteins
Flavor Compounds in Frozen Food:
1.Food flavors are a delightful combination ofvolatile aroma
compoundsand taste components (such as organic acids
and sugars).
2.The impact of freezing and subsequent frozen storage on
flavor compounds varies. These changes are primarily
influenced by enzymatic activities and lipid oxidation.
Components of FlavorFrozen food
The division into aroma and taste/non-volatile compounds.
Examples of non-volatile precursors: are lipids, peptides, amino acids, reducing
sugars, vitamins, and nucleotides.
FlavorDevelopment
•Interaction and breakdown of flavor compounds during processing and storage
•Importance of flavor development for food quality.
Mechanism of FlavorFormation
•Role of processing techniques in flavor enhancement-
•Strategies for maintaining flavor quality during storage
Conclusion
•Flavor perception and stability are related to proteins, lipids, and
carbohydrates as well as the conditions of storage. Although
freezing offers exceptional food safety and extended storage time,
many reactions such as moisture migration, lipid oxidation, and
protein denaturation promote off-flavor formation. Therefore,
stability can be achieved with a more integrated understanding of
the flavor interactions within the complexity of foods. Also,
attention should be focused on the quality of raw materials and the
overall product technology to reduce oxidation andflavorloss.
Refference
•ME van Elswyk, JA Mooney, EM Hirschler, AR Sams. Lipid stability and
flavorquality of stored breast meat from broilers fed marine algae.
Book of abstracts IFT Annual Meeting 1995, pp.184.
•Ch Jacobsen, J Adler-Nissen, A Meyer. The effect of ascorbic acid on
Iron release from the emulsifier interface and on the oxidative flavor
deterioration in fish oil enriched may-onnaise. J Agric Food Chem
47(11):4917-4926, 1999.
•CD Dacaranhe, J. Terao. Effect of phosphatidic acid and
phosphatidylserine on lipid oxidation in beef homogenate during
storage and in emulsified sardine oil. J. Food Sci. 66(3):422-427, 2001.
•G Lercker, MT Rodríguez-Estrada. Cholesterol oxidation: presence of
7-ketocholesterol in different food products. J Food Comp and Anal
13:625-631. 2000.
•EJ Lee. DU Ahn. Effect of antioxidants on the production of off-odor
volatiles and lipid oxidation in irradiated turkey breast meat and
meathomogenates.
•J Craig, JA Bowers, P Seib. Sodium tripolyphosphate and sodium ascorbate
monophosphate as inhibitors of off-flavordevelopment in cooked, vacuum-
packaged, frozen turkey. J. Food Sci. 56(6):1529-1531, 1991.
•GR Trout, S Dale. Prevention of warmed-over flavorin cooked beef: effect of
phosphate type, phosphate concentration, a lemon juice/phosphate blend, and
beef extract. J Agric Food Chem 38(3):665-669, 1990.
•SY Hwang, JA Bowers, DH Kropf. Flavor, texture, color, and hexanal and TBA
values of frozen cooked beef packaged in a modified atmosphere. J Food Sci
55(1):26-29, 1990.
•N Fisher. S Widder. How proteins influence flavor. Food Tech (1): 68-70, 1997.
•RL. Adams, DS Mottram, JK Parker, HM Brown. Flavor-protein binding:
Disulfide interchange reactions between ovalbumin and volatile disulfides. J
Agric Food Chem (9):4333-4336, 2001.
•MP Lynch, C Faustman. Effect of aldehyde lipid oxidation products on
myoglobin. J Agric Food Chem