Microbial and Oxidative Changes in Low-Fat Ground Beef During Simulated Retail Distribution

A low-fat ground beef product containing water, carrageenan, encapsulated salt and hydrolyzed vegetable protein (carrageenan-based) was compared to a low-fat, all-beef control during simulated commercial manufacturing and retail distribution. Few differences were found in oxidative stability and microbial growth of the two. No differences (P>0.05) were found in aerobic plate counts, populations of psychrotrophs or mold and yeast populations for the two products. Hunter color ‘a’ values (redness) and overall color scores for surface color were higher (P<0.05) for the carrageenan-based product than the all-beef product. Retail display of low-fat products in aerobic packaging resulted in greater (P<0.05) product discoloration than anaerobic retail display.     

Low-Fat Fresh Pork Sausage Patty Stability in Refrigerated Storage with Potassiunn Lactate

Typical pork sausage patties (40% fat), low-fat (8%) control patties, and low-fat (8%) patties with 20% added water and 0.4% carrageenan were compared to identical treatments containing 2% potassium lactate. The lactate had no effect on percent discoloration or lean color during refrigerated aerobic storage. Sensory properties of pork sausage treatments were not affected by the lactate salt (P<0.05). Bacterial populations of low-fat pork sausage patties did not differ (P>0.05); however, the typical patties with 2% potassium lactate had lower (P<0.05) microbial numbers during refrigerated storage than typical fresh pork sausage. TBARS,‘L’,‘a’and‘b’values were unaffected by the potassium lactate (P>0.05).     

Characteristics of Low-fat Beef Patties Formulated with Carbohydrate-Lipid Composites

ABSTRACT: Chemical, physical, and sensory characteristics of low-fat beef patties containing carbohydrate-lipid composites (CLCs) were compared with those of all-beef patties. The CLC gels contained high-amylose cornstarch, maltodextrins, and canola oil. CLC patties had higher moisture, cooking yield, and fat retention than 20%-fat control patties. CLCs improved tenderness and juiciness and decreased cohesiveness of low-fat beef patties compared with 10%-fat control patties. Despite differences in CLC gel firmness, patties made with CLC gels containing corn, potato, and tapioca maltodextrins had similar physical and sensory properties. These results suggest that CLC gels perform well as a partial fat replacer in beef patties while providing flexibility in gel firmness selection.     

Sodium Alginate Plus Modified Tapioca Starch Improves Properties of Low-Fat Beef Patties

Sodium alginate (A) in combination with modified tapioca starch (T) was evaluated in low-fat beef patties cooked by broiling or grilling to 68 or 74°C. Added water was used with AT formulations at 7% (AT7) or 14% (AT14) levels. In comparisons with all-beef patties (8 and 20% fat), AT provided improvements in tenderness, juiciness and cooking yields without increasing fat retention or affecting beef flavor. In sensory comparisons with 14 commercially processed, low-fat beef patties, AT7 and 14 patties received the highest ratings. Combined use of A and T would provide improved acceptability of low-fat patties over that from using single fat replacers.     

Sensory Characteristics, Shear Values and Cooking Properties of Ground Beef Patties Extended with Iron- and Zinc-Fortified Soy Isolate, Concentrate or Flour

Ground beef patties made from 100% beef or beef extended with 20% rehydrated soy isolate, concentrate, or flour, with or without iron and zinc fortification, were evaluated for sensory, shear and cooking properties. With the exception of patties formulated with soy isolate, soy-added patties were rated as more tender (P <0.05) than all-beef patties. Soy isolate imparted textural characteristics to patties that were more similar to those of all-beef patties than to those of soy concentrate or soy flour extended patties. Patties made with soy flour had the highest cooking yields. Also, patties extended with soy flour had lower incidences of rancid flavor, but higher incidences of soy flavor compared with all other beef-soy formulations. Iron and zinc fortification produced a higher frequency of rancid flavor when used with soy isolate and concentrate.     

Glandless Cottonseed, Peanut and Soy Protein Ingredients in Ground Beef Patties: Effect on Rancidity and Othei Quality Factors

Defatted flours and protein concentrates and isolates produced from glandless cottonseed, peanut, and soybean were used in rehydrated state (1:2 dry material/water) to replace 10% of the meat in ground beef patties. Fat content of both all-beef and extended patties was adjusted to 20%. Patties were baked on racks to varying final internal temperatures. Extended patties were compared with all-beef patties for rancidity development, cooking properties, and sensory quality. All the oilseed protein ingredients retarded oxidative rancidity development in cooked refrigerated patties, with the highest antioxidant potential shown by the cottonseed protein ingredients. Extended patties had higher cooked yields than all-beef patties, contamed less fat, and were not significantly different from all-beef patties in sensory quality.     

Effect of grind size and fat levels on the physico-chemical and sensory characteristics of low-fat ground buffalo meat patties

Two experiments were carried out to investigate the influence of grind size (3, 4 or 6 mm) and fat levels (6, 8, 10 or 20%) on the physico-chemical and sensory characteristics of low-fat ground buffalo meat patties prepared using a combination of carrageenan (0.5%) and sodium alginate (0.1%). At a constant fat level of nearly 8%, there was no significant difference (P>0.05) in the cooking yield, pH, proximate composition and dimensional changes of patties prepared at different grind sizes. However, shear force value increased significantly (P<0.05) with an increase in grind size. The sensory scores were significantly (P<0.05) higher for patties prepared using 3 mm grind size as compared to those prepared at 4 and 6 mm grind sizes and hence it was adopted as the optimum grind size for low-fat ground buffalo meat patties. At a constant grind size of 3mm, cooking yield, moisture, protein and gain in height were significantly (P<0.05) higher and shear force values were significantly (P<0.05) lower for patties at all low-fat levels as compared to the control with 20% fat. Based on its significantly higher (P<0.05) sensory scores, 10% fat level was selected as optimum for low-fat ground buffalo meat patties, although even at 8% fat level sensory rating remained between good to very good.     

Effect of oat's soluble fibre (β-glucan) as a fat replacer on physical, chemical, microbiological and sensory properties of low-fat beef patties

This study evaluated the effect of adding oat fibre source of β-glucan (13.45%) on physical, chemical, microbiological and sensory traits of low-fat (<10%) beef patties as compared to 20% fat control patties. Significant (p<0.05) improvements in cooking yield (74.19%), and retentions of fat (79.74%) and moisture (48.41%) of low-fat patties were attributed to the water binding ability of β-glucan. Because of larger water retentions moisture contents of raw and cooked low-fat patties were higher (p<0.05) than those of the control patties. Cholesterol content was similar across formulations. Low-fat and control beef patties remained stable in microbiological quality during 60days frozen storage. Low-fat patties were found to be of lower degree of likeness in the taste but juicer than control (p<0.05). Besides appearance, tenderness and colour were not affected by the addition of oat's soluble fibre. Oat fibre can be used successfully as a fat substitute in low-fat beef patties.     

Fat Level and Freezing Temperature Affect Sensory, Shear, Cooking and Compositional Properties of Ground Beef Patties

Experiments were conducted to determine effects of two targeted fat levels (6, 20%) and two freezing temperatures (?43, ?20°C) on sensory, shear, cooking and compositional properties of beef patties. Select grade beef rounds (IMPS 161) were used as the lean source for patties with U.S. Choice plates as the fat source. The 20% fat formulation had increased beef flavor and initial tenderness (?20°C frozen patties only) scores, but had higher instrumental shear values compared to the 6% fat patties. Freezing patties (especially those of 6% fat) at ?43°C greatly improved sensory and instrumental tenderness. Faster freezing reduced fat retention of 20% fat patties during cooking. Use of Select grade beef rounds coupled with rapid freezing is suggested for producing acceptable low-fat ground beef patties.     

Use of electrical stimulation, hot processing and carrageenan for processing low-fat ground beef patties

Three studies were conducted to determine the effects of electrical stimulation, hot processing and carrageenan usage on sensory, shear force and cooking properties of low-fat (5, 10%) beef patties. The right or left sides of beef carcasses assigned to electrical stimulation (ES) received 600 V pulsating current for 120 s. Non-stimulated (NS) sides were also included for comparisons. Sides subjected to hot processing (HP) were boned 90 min post-exsanguination. Cold processing (CP) was initiated 48 h post mortem. Formulations for the manufacture of patties included the use of carrageenan [none, 0.5% iota (ι), 0.5% kappa (κ)]. Patties from NSHP beef had higher pH and cooking yields, less shrink in patty dimensions during cooking and lower shear force values than patties from NSCP controls (P < 0.05). ES improved tenderness and juiciness of CP patties, while ESHP patties exhibited higher cooking yields than NSCP patties. Tenderness was improved in two of the three studies as a result of increasing the fat content from 5 to 10%. Use of ι-carrageenan provided improvements in tenderness and juiciness over patties receiving no carrageenan or κ-carrageenan. Processors should consider HP with 1.0% added salt (improved cooking yields, patty configuration, tenderness) and the use of ι-carrageenan (improved tenderness and juiciness) for low-fat beef patties.     

Effects of potassium lactate,sodium metasilicate,peroxyacetic acid,and acidified sodium chlorite on physical,chemical, and sensory properties of ground beef patties

Beef trimmings were treated with 3% potassium lactate (KL), 4% sodium metasilicate (NMS), 0.02% peroxyacetic acid (PAA) or 0.1% acidified sodium chlorite (ASC) or left untreated (CON). Beef trimmings were ground, pattied, and sampled for 7 days. Under simulated retail display, instrumental color, sensory characteristics, TBARS, pH, and Lee–Kramer shear force were measured to evaluate the impact of the treatments on the quality attributes. The NMS and PAA patties were redder (a^∗, P < 0.05) than CON on days 0–3. Panelists found KL, NMS, PAA, and ASC patties to have less (P < 0.05) or similar (P > 0.05) off odor to CON on days 0–3. The NMS and PAA treated patties had lower (P < 0.05) lipid oxidation than the CON at days 0, 3, and 7. Therefore, KL, NMS, PAA, and ASC treatments on beef trimmings can potentially improve or maintain quality attributes of beef patties.     

Characteristics of low-and high-fat beef patties: effect of high hydrostatic pressure.

The purpose of this study was to analyze the consequences of applying high pressures (100 and 300 MPa for 5 or 20 min) on characteristics such as water- and fat-binding properties, texture, color, microstructure, and microbiology of low-fat (9.2%) and high-fat (20.3%) beef patties. In nonpressurized patties, the low-fat product exhibited significantly poorer (P < 0.05) binding properties and higher (P < 0.05) Kramer shear force and Kramer energy than did high-fat patties. Although high pressure did not clearly influence the binding properties of low- and high-fat beef patties, it did produce a rise in the Kramer shear force and energy which were more pronounced at 300 MPa. High pressures altered patty color, the extent of alteration depending on fat content, pressure, and pressurizing time. Pressurizing high- and low-fat beef patties at 300 MPa not only produced a lethal effect (P < 0.05) on microorganisms, but caused sublethal damage as well.     

Storage Stability of Low-fat Ground Beef Made with Lower Value Cuts of Beef

Five combinations of low-fat ground beef treatments were prepared with lower value raw-materials: 90% lean cow trimmings, 50/50 Choice trimmings, 95% lean Choice trimmings, defatted clods and rounds, cow knuckles, and cow chucks. They were compared to a 20% fat control for quality attributes during 24 wk frozen (?20°C) storage. Control patties had greater (P<0.05) cooking loss, shear force, and connective tissue, and lower (P<0.05) juiciness scores than low-fat treatments. All low-fat pattie treatments were rated higher (P<0.05) in flavor intensity than control patties. Low-fat patties manufactured with a majority of lean cow trimmings had a greater color (pigment) and oxidative (lipid) stability.     

Low-Fat Ground Beef from Desinewed Shanks With Reincorporation of Processed Sinew

Six shank treatments (one at 7% and five at 10% fat) and two ground round controls (10 and 20% fat) were used to compare sensory properties of low-fat ground beef from shanks with and without sinew reincorporated. Five shank treatments were desinewed with a commercial de-sinewer; the other was whole ground shank. Four desinewed shank treatments had 7% flaked sinew reincorporated; the fifth had none. Patties with flaked sinew had more (P < 0.05) collagen than controls or those with desinewed shank only. Control patties had lower pH (P < 0.05) than shank patties (5.80 vs 6.07). Desinewed-shank patties had fewer (P < 0.05) connective tissue particles and were more (P < 0.05) juicy than whole-ground-shank patties. Shank patties were lighter red but less stable in color than the controls.     

Replacement of Beef Fat with Partially Hydrogenated Plant Oil in Lean Ground Beef Patties

Partially hydrogenated plant oils (corn, cottonseed, palm, peanut and soybean) were substituted (in part) for beef fat in lean (10% fat) ground beef patties to improve nutrient content of ground beef. Effects of such addition on composition and consumer acceptability were evaluated. Addition of hydrogenated plant oils had little effect on composition of raw or cooked patties. Those containing hydrogenated corn or palm oil were not different (P>0.05) from all-beef patties in cooking loss or overall acceptability. Therefore substitution of hydrogenated oils for beef fat in production of lean ground beef patties may be feasible.     

The effects of multiple antimicrobial interventions on processing, lipid, textural, instrumental color and sensory characteristics when used in a ground beef patty production system

The impact of multiple antimicrobial interventions on ground beef processing, lipid, textural, instrumental color and sensory characteristics were evaluated. Beef trimmings were treated with 0.5% cetylpyridinium chloride followed by 10% trisodium phosphate (CT), 200-ppm chlorine dioxide followed by 0.5% cetylpyridinium chloride (CLC), 200-ppm chlorine dioxide followed by 10% trisodium phosphate (CLT), or 2% lactic acid followed by 0.5% cetylpyridinium chloride (LC) and compared to an untreated control (C). Sensory panelists found LC and CT treatments similar (P>0.05) in grinding ability to C. By day 2 of display, CT, CLT and LC patties were redder (a(?); P<0.05) than C. Sensory panelists found CT patties redder (P<0.05) than C by day 2 of display. Sensory panelists found CT and CLT juicier than C. Therefore, the use of these multiple antimicrobial intervention agents on beef trimmings may improve sensory characteristics and shelf-life of ground beef patties.     

Precooked Reduced-Fat Beef Patties Chemical and Sensory Quality as Affected by Sodium Ascorbate, Lactate and Phosphate

Beef-carrageenan (BC; 10% fat) patties—with sodium ascorbate (0.05%), sodium lactate (3%), sodium tripolyphosphate (0.3%), ascorbate-phos-phate, ascorbate-lactate, or none—and 20%-fat all-beef patties were cooked, aerobically or vacuum packaged, and stored at 4°C or ?20°C. Fat level had a greater effect on texture than did additives. Lactate and phosphate increased cooking yield of BC patties. Phosphate was antioxidative but not antimicrobial. Ascorbate was antioxidative and reduced aerobic plate counts (APCs) of aerobically packaged refrigerated BC. Lactate reduced APCs of both aerobically and vacuum packaged BC patties. Lactate had a prooxidative effect in aerobically-packaged/frozen patties but showed no such effect in vacuum-packaged/frozen patties or refrigerated patties. Ascorbate-phosphate was most effective in minimizing flavor deterioration in refrigerated BC patties.     

Hot Processed Raw Materials and Fat Level Affect Physical and Sensory Characteristics of Ground Beef

Sixteen treatment combinations of ground beef were evaluated (two lean types, four fat types, and two fat levels) to determine the characteristics of ground beef produced from hot fat and prerigor lean (HL). Half of each batch was immediately made into patties and the remaining chub pack stored (2°C). Fat type had no (P>0.05) effect on appearance or sensory characteristics of patties; however, all prerigor fat treatments and HL reduced (P<0.05) cooking loss. Fat smearing was greater (P<0.05) in HL patties, but no (P>0.05) difference was detected after chub pack storing (2°C). The HL improved (P<0.05) tenderness in stored ground beef.     

Potassium Lactate Effects on Low-Fat Fresh Pork Sausage Chubs During Simulated Retail Distribution

Typical pork sausage (25% fat) and low-fat (8% fat) sausage with or without 20% added water and 0.4% carrageenan were compared to identical treatments containing 3.0% potassium lactate. Microbial populations of low-fat treatments did not differ (P>0.05). However, typical sausages with lactate had lower psychrotrophic counts than typical sausage. Lactate delayed (P<0.05) pH decline in typical sausages but had no effect on low-fat sausages (P>0.05). Addition of water and carrageenan to commercially manufactured and distributed low-fat sausage had no deleterious effects on microbial, lipid or color stability.     

ACCEPTABILITY OF VARIOUS GROUND BEEF AND PORK PRODUCTS EXTENDED WITH MECHANICALLY SEPARATED BEEF

Six blends of ground beef and six blends of ground pork containing 0, 15, 30, 45, 60 or 75% mechanically separated beef (MSB) were prepared. Also five batches of fermented sausage and spiced luncheon loaf containing 0, 5, 10, 15 and 20% MSB were formulated. Level of MSB was not related to juiciness rating or mealiness scores of cooked beef/MSB or pork/MSB patties. The level of MSB significantly affected overall eating satisfaction ratings for each blend of MSB patties. MSB at levels of 15% or more had a negative effect on flavor acceptability of cooked ground beef or pork. Fermented sausage products could be extended with only 5% MSB without creating defects in visual appearance or sensory properties. However, the inclusion of 20% MSB yielded a spiced luncheon loaf which was higher in eating quality than an all-beef control. The beef/MSB patties, fermented sausage, and spiced luncheon loaves containing 15% MSB were acceptable for visual appearance. Based on this study, MSB produced from a press type machine, can be blended up to 15% with ground beef, ground pork and sausage products without significantly decreasing raw appearance, sensory properties or storage life. Since MSB is a red meat product available at a similar low cost as textured vegetable protein, the red meat industry would benefit from expanded use of this high protein extender.