References.- 1 Solubility of Proteins.- 1.1 Introduction.- 1.1.1 Factors Affecting Solubility of Proteins.- 1.2 Solubility of Meat and Fish Proteins.- 1.2.1 Solubility of Muscle Proteins.- 1.2.2 Solubility of Stroma Proteins.- 1.2.3 Protein Solubility in Processed Meats.- 1.2.4 Solubility of Blood Proteins.- 1.2.5 The Effect of Heating on Solubility of Proteins.- 1.2.6 The Effect of Freezing and Storage When Frozen on Protein Solubility.- 1.2.7 The Effect of Protein Modification and Irradiation Treatment.- 1.3 Solubility of Milk Proteins.- 1.4 Solubility of Egg Proteins.- 1.5 Solubility of Plant Proteins.- 1.5.1 Soybean Proteins.- 1.5.2 Peanut Proteins.- 1.5.3 Pea and Bean Proteins.- 1.5.4 Sunflower Proteins.- 1.5.5 Corn Proteins.- 1.5.6 Miscellaneous Plant Proteins.- References.- 2 Water Holding Capacity of Proteins.- 2.1 Introduction.- 2.2 The Mechanism of Protein-Water Interaction.- 2.2.1 Factors Influencing Water Binding of Proteins.- 2.3 Water Holding Capacity of Proteins in Meat and Meat Products.- 2.3.1 Water Binding Capacity of Muscle Proteins.- 2.3.2 Factors Influencing Water Binding of Muscle Proteins.- 2.3.3 Water Binding in Comminuted Meat Products.- 2.3.4 Milk Proteins in Comminuted Meats.- 2.3.5 Soy Proteins in Comminuted Meats.- 2.3.6 Corn Germ Protein in Comminuted Meats.- 2.4 Water Holding Capacity of Milk Proteins.- 2.5 Water Holding Capacity of Egg Proteins.- 2.6 Water Holding Capacity of Plant Proteins.- 2.6.1 Soybean Proteins.- 2.6.2 Pea and Bean Proteins.- 2.6.3 Sunflower Proteins.- 2.6.4 Corn Proteins.- 2.6.5 Wheat Proteins.- 2.6.6 Miscellaneous Proteins.- References.- 3 Emulsifying Properties of Proteins.- 3.1 Introduction.- 3.2 Hydrophobic and Hydrophilic Properties of Proteins.- 3.3 Interfacial Film Formation and Properties.- 3.4 Factors Affecting the Emulsifying Properties of Proteins.- 3.4.1 Protein Concentration.- 3.4.2 pH of Medium.- 3.4.3 Ionic Strength.- 3.4.4 Heat Treatment and Other Factors.- 3.5 Emulsion Stability.- 3.6 Measuring Emulsifying Properties.- 3.7 Emulsifying Properties of Meat Proteins and Proteins Utilized as Extenders in Meat Products.- 3.7.1 Protein Functionality in Comminuted Meats.- 3.7.2 Emulsifying Properties of Various Muscular Proteins.- 3.7.3 Emulsifying Properties of Blood Proteins.- 3.8 Functionality of Nonmeat Proteins in Comminuted Meats.- 3.8.1 Milk Proteins.- 3.8.2 Soy Proteins.- 3.8.3 Corn and Wheat Germ Proteins.- 3.9 Milk Proteins as Emulsifiers in Food Systems.- 3.9.1 Emulsifying Properties of Caseins and Caseinates.- 3.9.2 Emulsifying Properties of Whey Proteins.- 3.10 Emulsifying Properties of Egg Proteins.- 3.11 Emulsifying Properties of Plant Proteins.- 3.11.1 Soybean Proteins.- 3.11.2 Pea and Bean Proteins.- 3.11.3 Corn Proteins.- 3.11.4 Miscellaneous Proteins.- References.- 4 Oil and Fat Binding Properties Of Proteins.- 4.1 Introduction.- 4.2 Fat Binding Properties of Proteins of Animal Origin.- 4.2.1 Muscle Proteins.- 4.2.2 Soy Proteins in Comminuted Meats.- 4.2.3 The Effect of Corn Germ Protein Flour on Fat Binding in Ground Beef Patties.- 4.2.4 Milk and Egg Proteins.- 4.3 Fat Binding Properties of Proteins of Plant Origin.- 4.3.1 Soy Proteins.- 4.3.2 Pea, Bean and Guar Proteins.- 4.3.3 Corn Germ Proteins.- 4.3.4 Wheat Proteins.- 4.3.5 Cottonseed Proteins.- 4.3.6 Miscellaneous Proteins.- References.- 5 Foaming Properties of Proteins.- 5.1 Introduction.- 5.2 The Mechanism of Foam Formation.- 5.2.1 Factors Affecting Foam Formation.- 5.2.2 Foam Stability.- 5.3 Milk Proteins.- 5.3.1 Factors Affecting the Foaming Properties of Milk Proteins.- 5.4 Egg Proteins.- 5.4.1 The Effect of Processing on Foaming Properties of Egg Proteins.- 5.5 Blood Proteins and Gelatin.- 5.6 The Foaming Properties of Plant Proteins.- References.- 6 Gelling Properties of Proteins.- 6.1 Introduction.- 6.2 The Mechanism of Protein Gel Formation.- 6.2.1 Heat-Induced Gelation.- 6.2.2 Protein-Water Interaction in Gels.- 6.2.3 Factors Affecting the Properties of Gels.- 6.3 Gelling Properties of Meat Proteins.- 6.3.1 Myofibrillar Proteins.- 6.3.2 Sarcoplasmic Proteins.- 6.3.3 Gelation of Red and White Muscle Proteins.- 6.3.4 Factors Affecting the Gelling Properties of Meat Proteins.- 6.3.5 Myosin Blends with Other Proteins and Lipids.- 6.3.6 Fish Proteins.- 6.3.7 Collagen Gelation.- 6.3.8 Blood Proteins.- 6.4 Gelling Properties of Milk Proteins.- 6.4.1 Gelling Properties of Whey Protein Concentrate, Isolate, and Individual hey Proteins.- 6.4.2 The Effect of Heating and Protein Concentration.- 6.4.3 Gelation of Casein.- 6.4.4 Factors Affecting the Gelling Properties of Milk Proteins.- 6.5 Gelling Properties of Egg Proteins.- 6.5.1 Gelation of Egg White.- 6.5.2 Gelation of Yolk.- 6.6 Gelling Properties of Soy Proteins.- References.

Functionality of Proteins in Food

Effects of protein level and fat/oil on emulsion stability, texture, microstructure and color of meat batters

Emulsification through the creation of a fat dispersion and formation of an interfacial protein membrane at the fat-water interface is not the sole aspect responsible for comminuted meat "emulsion" stability. In addition, water binding which occurs initially during myofibrillar protein extraction from tissue disruption, and later during entrapment within the heat-induced protein gel matrix, must be included. The criteria that affect formation of the gel matrix adds another aspect, in that conditions for optimum protein-protein interaction also influence ultimate water and fat stabilization. Rheological considerations are in their infancy and will require future study, particularly during the transformation of a "flowing" batter into a "nonflowing" solid product. This review has been aimed at emphasizing that the myofibrillar protein component is the predominant constituent involved in an interactive role with water, fat, and itself, in forming the ultimate stabilized comminuted meat matrix.

Functionality of muscle constituents in the processing of comminuted meat products

The growing demand by consumers for healthier products is stimulating the development of meat products with reduced fat contents and/or altered fatty acid profiles. Thus, there is an expanding new category of products that acquire added nutritional value as a result of a significant reduction in their fat and calorie contents, and in their saturated fat and cholesterol levels. This article reviews the effects of lipid reduction and modification on the colour, flavour, texture and cooking properties of meat products. A description is also given of fat reduction technology based on one or a combination of the following procedures: the selection of meat ingredients to give a raw material that is suitable in terms of both composition and functionality; the addition of non-meat ingredients to help achieve the desired textural characteristics and particularly to enhance water-holding ability; and the adaptation, of manufacturing and/or preparation technologies to achieve certain functional characteristics or vary the composition of the final product.

Technologies for developing low-fat meat products

Fat reduction in comminuted meat products-effects of beef fat, regular and pre-emulsified canola oil.

— Frankfurter emulsions containing either 25% or 35% beef fat, pork fat, or cottonseed oil were prepared by comminuting at 1500, 2500, or 5000 rpm to temperatures ranging from 45°–85°F. Data were obtained on the viscosities of the emulsions; except for initially high viscosities for which unmelted fat was responsible, the viscosities of emulsions containing the fats, or oil, were similar: viscosities tended to decrease with increasing time and temperature of chopping. The frankfurters were stuffed, smoked, and cooked, and data were obtained on shrinkage, fat retention, ease of peeling, specific gravity, and texture. Shrinkage was inversely related to content of fat. Fat separation mainly occurred in processing frankfurters containing beef fat; the data suggest that emulsions containing beef fat should be comminuted to 65°–75°F to avoid possible under or overchopping: the results show that optimum conditions were time as well as temperature dependent. The air content of frankfurters varied inversely with the maximum temperature attained during communition. Frankfurter skin strength was lessened on increasing the temperatures to which emulsions were communited; elasticity, the equivalent of rubberiness, decreased under these conditions.

Effects of types and levels of fat and rates and temperatures of comminution on the processing and characteristics of frankfurters

Texture Profile Analysis of Patties Made from Mixed and Flake-Cut Mechanically Deboned Poultry Meat

— The effect of time, temperature and rpm of comminution of emulsions was determined on the dispersion of approximately 25% of beef fat, pork fat or cottonseed oil in frankfurters. The numbers of lipid particles 5 μ or less in diameter increased in frankfurters containing either beef or pork fat as comminution was continued to higher temperatures, with pork fat dispersed more thoroughly. Fat tended to separate from frankfurters containing beef fat in particles 200 μ or more in diameter. In contrast, no specific degree of dispersion of particles 5 μ or less in diameter consistently indicated emulsion stability, or its lack. Increased rpm during comminution produced an increased dispersion of beef or pork fat. Under the same conditions pork fat was dispersed more finely than beef fat. Dispersion of cottonseed oil produced finely dispersed particles beyond the resolution of light microscopy, as was confirmed by electron microscopy which showed a substantial number of particles to be less than 1 μ in diameter.

Effects of types of fat and of rates and temperatures of comminution on dispersion of lipids in frankfurters

Fermented sausages were prepared from: (1) PSE pork, (2) normal pork, and (3) a 50/50 mixture of PSE and normal pork. Although pH values differed initially they were essentially the same after 35 days drying. Only 50–60% as long was required for drying of sausage made from PSE as compared to normal pork. Sausages prepared with only PSE pork had the highest moisture diffusion rate, TBA values, and lactic acid content. Cured color of the PSE group was paler red and more yellowish than those prepared with only normal pork. Water-holding capacity, water activity values and force to shear were lowest and highest for sausages made, respectively, from PSE pork only and from normal pork.

Effect of pork quality on some chemical, physical, and processing properties of fermented dry sausage

Quality of Patties Containing Mechanically Deboned Broiler Meat, Hand Deboned Fowl Meat and Two Levels of Structured Protein Fiber

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