Search

Previous research on the impact of various heat treatment methods on meat has primarily focused on conventional meats from common livestock animals, with limited studies on the effects of different heat treatments on foal meat. The aim of this study was to evaluate how different heat treatments, including sous-vide, affect the sensory, textural, and physicochemical characteristics of foal meat. This allowed for the identification of the most effective heat treatment method to preserve the optimal quality attributes of foal meat while enhancing sensory and textural qualities preferred by consumers. Samples of m. longissimus thoracis were subjected to traditional cooking in two variants: in water at 100 °C in a foil bag for 1.5 h, and cooked to a core temperature of 85 °C (16 half-carcasses × 2 traditional heat treatment methods = 32 samples). Additionally, m. longissimus thoracis was subjected to sous-vide at 55 °C and 65 °C for 4 and 24 h (16 half-carcasses × 2 temperature settings × 2 time settings = 64 samples). Chemical composition, physicochemical properties, color parameters, hem pigment levels, texture characteristics, and sensory properties were analyzed. Compared to sous-vide samples, traditionally cooked foal meat exhibited higher weight loss ( p = 0.002), higher fat content ( p = 0.003), and lower water content ( p = 0.03). Significant improvements in tenderness were observed in sous-vide samples, with the lowest shear force values (52.86 N/cm 2 at 55 °C and 48.39 N/cm 2 at 65 °C; p = 0.001) and meat hardness (102.44 N and 101.27 N, respectively; p = 0.015) after 24 h of thermal processing. Moreover, sous-vide cooking significantly improved sensory properties of foal meat, particularly juiciness ( p = 0.002), tenderness ( p = 0.002), and flavor desirability ( p = 0.03), which were highly rated by consumers.

The effect of goose meat sous-vide (SV) cooking at 6 combinations of temperature (60°C, 80°C) and time (4, 6, 12h) on selected functional properties was investigated. The study conducted an assessment of cooking loss (CL), moisture content, pH, longitudinal (LS), and transverse (TS) shrinkage, shear force (SF), texture profile analysis (TPA), color parameters (L*, a*, b*, C, h°), ΔE and carried out sensory evaluation. A total of 168 breast muscles (BM with and without skin) from 17-wk-old "Polish oat geese" were utilized. The CL was affected by both cooking temperature and time. The CL for meat with skin was higher than for without ones, and it was lower for both kinds of meat cooked at 60°C than at 80°C for all cooking times. The LS was higher than the TS. The higher shrinkage was stated for meat cooked at 80°C. There was a reduction in moisture content and slightly increasing pH by increasing temperature and prolonging cooking time. For both kinds of meat, the highest moisture retention was stated at 60°C/4h, and the lowest in samples heated at 80°C/12h. The samples cooked at 60°C were characterized by a higher L* value than those at 80°C. The a* values were higher for samples cooked at 60°C than those at 80°C, whereas b* were higher for meat cooked at 80°C. The SF exhibited a trend of lower values at 60°C compared to samples cooked at 80°C and it increased with prolonged cooking time. The value of hardness, cohesiveness, springiness, gumminess, and chewiness for meat cooked at 60°C increased, and for samples cooked at 80°C decreased with increasing cooking time. It was no significant differences in sensory scores for overall palatability for both kinds of meat cooked at 60°C and 80°C. Goose meat cooked at different time and temperature combinations showed extremely desirable overall palatability. Taking into account all discussed parameters, the optimal combination seems to be 60°C/4h., Competing Interests: DISCLOSURES The authors declare no conflicts of interest., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)

The selection of appropriate temperatures and times for cooking various muscle meats are the key factors for manipulating eating quality such as tenderness, the degree of doneness, water retention, and taste. The mild cooking temperature in sous-vide tends to affect meat quality. The impact of prolonged cooking is deemed the prerequisite treatment for the microbiological safety of sous-vide meat. An approach to sequential sous-vide cooking and its effect on textural properties is also presented in this review. Neither the physicochemical properties (tenderness, color, and water retention) nor palatability (umami and volatile flavors) was perceived as optimal at one temperature point. Temperatures of 50-60 °C were vital for the textural properties of sous-vide cooked meat. Temperatures >70 °C had a pronounced effect on palatability development, likely from the generation of umami from nucleotides and volatile flavor from the Strecker degradation of amino acids occurring at higher temperatures., (Copyright © 2022 Elsevier Ltd. All rights reserved.)

Thermal processing is an inevitable part of the processing and preparation of meat and meat products for human consumption. However, thermal processing techniques, both commercial and domestic, induce modifications in muscle proteins which can have implications for their digestibility. The nutritive value of muscle proteins is closely related to their digestibility in the gastrointestinal tract and is determined by the end products that it presents in the assimilable form (amino acids and small peptides) for the absorption. The present review examines how different thermal processing techniques, such as sous-vide, microwave, stewing, roasting, boiling, frying, grilling, and steam cooking, affect the digestibility of muscle proteins in the gastrointestinal tract. By altering the functional and structural properties of muscle proteins, thermal processing has the potential to influence the digestibility negatively or positively, depending on the processing conditions. Thermal processes such as sous-vide can induce favourable changes, such as partial unfolding or exposure of cleavage sites, in muscle proteins and improve their digestibility whereas processes such as stewing and roasting can induce unfavourable changes, such as protein aggregation, severe oxidation, cross linking or increased disulfide (S-S) content and decrease the susceptibility of proteins during gastrointestinal digestion. The review examines how the underlying mechanisms of different processing conditions can be translated into higher or lower protein digestibility in detail. This review expands the current understanding of muscle protein digestion and generates knowledge that will be indispensable for optimizing the digestibility of thermally processed muscle foods for maximum nutritional benefits and optimal meal planning., (© 2021 Institute of Food Technologists®.)

The aim of this study was to compare the histochemical and meat quality characteristics between the normal and white-striping (WS) pectoralis major muscles. Additionally, this study investigated the effects of oven cooking (OV) and sous-vide (SV) cooking methods on objective texture parameters and sensory quality characteristics of the normal and WS chicken breast meats. Results showed that the WS condition broilers had higher body and breast weights (P < 0.001), and a greater area of muscle fiber than the normal broilers (P < 0.001). The WS fresh fillets exhibited a lower preference of visual appearance compared to the normal fillets (P < 0.05), although no differences were detected in the characteristics of meat quality between the groups (P > 0.05). After cooking, there was greater cooking loss, Warner-Bratzler shear force, and texture parameter analysis-hardness values for breast fillets cooked by OV treatment at 180°C for reached core temperature to 71°C compared to the fillets cooked by SV treatment at 60°C for 2 h (P < 0.05), whereas the normal and WS groups were exhibited similar values within each cooking methods (P > 0.05). Regarding sensory quality characteristics, WS breast fillets cooked by SV (SV+WS) were rated as tenderer and juicier, and given a higher overall acceptability score compared to normal and WS fillets cooked by OV (P < 0.05). However, owing to a lesser developed flavor in SV+WS fillets, the panelists assigned a lower overall acceptability rating in these fillets compared to SV+Normal fillets (P < 0.05). Overall, the SV cooking can be an effective method for improving the sensory quality characteristics of WS and normal chicken breast., (Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.)

This study investigated the combined effects of cooking temperature and time on the meat and eating quality characteristics of the sous-vide chicken breast. For the control group, chicken breast samples were cooked in a convection oven until the internal temperature reached 71°C. Each sample for sous-vide cooking was vacuum packaged and then cooked under continuous thermocontrolled conditions in a water bath at 6 combinations of cooking temperature (60 and 70°C) and time (1, 2, and 3 h). Sous-vide cooked chicken meat at 60°C for 1 h (SV60-1h) showed lower cooking loss (6.58 vs. 26.5%, P < 0.05), Warner-Bratzler shear force (21.7 vs. 29.1 N, P < 0.05), and hardness (9.40 vs. 17.3 N, P < 0.05) than meat cooked by conventional oven. Similar to the objective tenderness parameters, cooked chicken meat from the SV60 treatments for all cooking times showed higher scores in all the tenderness attributes than the control group (P < 0.05). However, a higher flavor intensity was observed in the SV70-3h and control groups than in the SV60 treatments (P < 0.05). Owing to a lesser developed flavor in chicken meat from the SV60-1h treatment, the SV60-2h and 3h treatments were assigned a higher acceptability rating for overall impression (P < 0.05). Therefore, cooking temperature and time of sous-vide significantly influenced the physicochemical and palatability characteristics of chicken breast. In this study, the optimum conditions for the sous-vide chicken breast are to continuously cook at 60°C for 2 to 3 h to improve sensory quality characteristics without reducing the water-holding capacity., (Copyright © 2020 The Authors. Published by Elsevier Inc. All rights reserved.)

This study evaluated the influence of different factors on pork hams cooked by sous-vide method. The quality and structural and microbiological properties of the treated samples were compared with those of controls. Samples were subjected to treatment at different combinations of temperature (61 °C or 71 °C), time (45 or 90 min), and vacuum degree (98.81% or 96.58%). The control sample was air packaged and boiled for 45 min in boiling water. Temperature and vacuum degree affected quality properties, while the effect of time was limited. Samples cooked at 61 °C showed higher moisture content, redness, and pink color of the meat juice, whereas samples cooked at 71 °C showed higher cooking loss rate, lightness, and volatile basic nitrogen values. Texture analysis indicated tenderer meat for the treatment group than the control. No microbial growth was detected in any treatment groups. Meat cooked at 61 °C and 98.81% vacuum showed more spacious arrangement of meat fiber., (Copyright © 2018 Elsevier Ltd. All rights reserved.)

Heat treatment of meat at temperatures between 50 and 65 °C, for extended periods of time, is known as low-temperature long-time (LTLT) cooking. This cooking method produces meat that has increased tenderness and better appearance than when cooked at higher temperatures. Public concerns regarding this method have focused on the ability to design heat treatments that can reach microbiological safety. The heat treatment induces modification of the meat structure and its constituents, which can explain the desirable eating quality traits obtained. Denaturation, aggregation, and degradation of myofibrillar, sarcoplasmic and connective tissue proteins occur depending on the combination of time and temperature during the heat treatment. The protein changes, especially in relation to collagen denaturation, along with proteolytic activity, have often been regarded to be the main contributors to the increased meat tenderness. The mechanisms involved and the possible contribution of other factors are reviewed and discussed., (Copyright © 2018 Elsevier Ltd. All rights reserved.)

The heat resistance of a cocktail of five Salmonella strains and five L. monocytogenes strains was determined in teriyaki-marinated chicken breasts. Inoculated meat, packaged in bags, were completely immersed in a circulating water bath and cooked to a final temperature of 55, 57.5 or 60°C in 1h, and then held for predetermined times. The surviving Salmonella and L. monocytogenes cells were enumerated by surface plating on XLD agar and Palcam agar, respectively. D-values, determined by linear regression, of Salmonella in chicken breast ranged from 47.65min at 55°C to 7.48min at 60°C; the values for L. monocytogenes ranged from 54.81min at 55°C to 10.39min at 60°C. Marination rendered the pathogen more sensitive to the lethal effect of heat. The results of this study will assist the food industry in ensuring microbiological safety of sous-vide processed marinated chicken breasts., (Published by Elsevier Ltd.)

Low temperature long time (LTLT) sous-vide cooking may modify meat proteins in a way that could promote satiety. We investigated the effects of (1) cooking method (LTLT 58 °C vs. oven 160 °C), (2) LTLT holding time (17 h vs. 72 min), and (3) pork structure, LTLT 58 °C for 17 h (minced vs. roast) on appetite regulation and in vitro protein digestibility. In a cross-over study, 37 healthy men consumed four meals containing pork: LTLT-cooked roast, 58 °C, 72 min; LTLT-cooked roast, 58 °C, 17 h; and, oven-cooked roast, 160 °C to a core temperature of 58 °C and LTLT-cooked minced patties, 58 °C, 17 h. Ad libitum energy intake (EI) after three hours was the primary endpoint. Moreover, subjective appetite sensations were assessed. Protein digestibility was determined in an in vitro simulated digestion model. Ad libitum EI did not differ between the meals. Furthermore, appetite ratings were not clearly affected. LTLT cooking for 72 min increased the proteolytic rate in the early gastric phase during digestion as compared to LTLT cooking for 17 h or oven cooking. In conclusion, LTLT cooking, LTLT holding time, and pork structure did not affect ad libitum EI. However, LTLT cooking at 58 °C for 72 min seemed to enhance in vitro protein digestibility., Competing Interests: The authors declare no conflict of interest.

This observational study aims to investigate the microbiological quality of commercially prepared lightly cooked foods with a major component of food of animal origin and collected as would be served to a consumer. A total of 356 samples were collected from catering (92%), retail (7%) or producers (1%) and all were independent of known incidents of foodborne illness. Using standard methods, all samples were tested for: the presence of Campylobacter spp. and Salmonella spp. and enumerated for levels of, Bacillus spp. including B. cereus, Clostridium perfringens, Listeria spp. including L. monocytogenes, Staphylococcus aureus, Escherichia coli, Enterobacteriacea and aerobic colony count (ACC). Results were interpreted as unsatisfactory, borderline or satisfactory according to the Health Protection Agency guidelines for assessing the microbiological safety of ready-to-eat foods placed on the market. Amongst all samples, 70% were classified as satisfactory, 18% were borderline and 12% were of unsatisfactory microbiological quality. Amongst the unsatisfactory samples, six (2%) were potentially injurious to health due to the presence of: Salmonella spp. (one duck breast); Campylobacter spp. (two duck breast and one chicken liver pâté); L. monocytogenes at 4·3 × 103 cfu (colony-forming units)/g (one duck confit with foie gras ballotin) and C. perfringens at 2·5 × 105 cfu/g (one chicken liver pâté). The remaining unsatisfactory samples were due to high levels of indicator E. coli, Enterobacteriaceae or ACC.

Lamb loins were subjected to sous-vide cooking at different combinations of temperature (60 and 80°C) and time (6 and 24h) to assess the effect on the volatile compound profile. Major chemical families in cooked samples were aliphatic hydrocarbons and aldehydes. The volatile compound profile in sous-vide cooked lamb loin was affected by the cooking temperature and time. Volatile compounds arising from lipid oxidation presented a high abundance in samples cooked at low or moderate cooking conditions (60°C for 6 and 24h, 80°C for 6h), while a more intense time and temperature combination (80°C for 24h) resulted on a higher concentration of volatile compounds arising from Strecker degradations of amino acids, as 2-methylpropanal and 3-methylbutanal. Therefore, sous-vide cooking at moderately high temperatures for long times would result in the formation of a stronger meaty flavor and roast notes in lamb meat., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

This study evaluated the effect of brining with phosphates on the physico-chemical and sensory features of sous-vide and roasted cooked lamb. Lamb loins (n=48) were injected with either 10% w/w of distilled water or a solution containing 0.2% or 0.4% (w/v) of a mixture of phosphate salts. After injection, samples were either sous-vide cooked (12h-60°C) or oven roasted (180°C until 73°C of core temp.). Expressible moisture, cooking loss, instrumental color, pH, water holding capacity, instrumental texture and sensory properties were evaluated. Brining with phosphates led to lower cooking loss in both sous-vide and oven roasted samples, but only the former showed significantly higher moisture content. Phosphates increased instrumental hardness and shear force values in sous-vide samples, while this effect was not as evident in roasted ones. Toughness was reduced and juiciness was improved as a consequence of phosphate addition. Overall, injection of a phosphate solution appears as a potential procedure for improving sensory textural features of cooked lamb whole cuts., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

Objective: Sous-vide cooking offers several advantages for poultry meat, including enhanced tenderness, reduced cooking loss, and improved product yield. However, in duck meat, there are challenges associated with using the sous-vide method. The prolonged cooking time at low temperatures can lead to unstable microbial and oxidative stabilities. Thus, we aimed to assess how varying sous-vide cooking temperatures and durations affect the physicochemical and microbial characteristics of duck breast meat, with the goal of identifying an optimal cooking condition. Methods: Duck breast meat (Anas platyrhynchos) aged 42 days and with an average weight of 1,400±50 g, underwent cooking under various conditions (ranging from 50°C to 80°C) for either 60 or 180 min. Then, physicochemical, microbial, and microstructural properties of the cooked duck breast meat were assessed. Results: Different cooking conditions affected the quality attributes of the meat. The cooking loss, lightness, yellowness, Hue angle, whiteness, and thiobarbituric acid reactive substance (TBARS) values of the duck breast meat increased with the increase in cooking temperature and time. In contrast, the redness and chroma values decreased with the increase in cooking temperature and time. Cooking of samples higher than 60°C increased the volatile basic nitrogen contents and TBARS. Microbial analysis revealed the presence of Escherichia coli and Coliform only in the samples cooked at 50°C and raw meat. Cooking at lower temperature and shorter time increased the tenderness of the meat. Microstructure analysis showed that the contraction of myofibrils and meat density increased upon increasing the cooking temperature and time. Conclusion: Our data indicate that the optimal sous-vide method for duck breast meat was cooking at 60°C for 60 min. This temperature and time conditions showed good texture properties and microbial stability, and low level of TBARS of the duck breast meat. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Food Safety & Food Quality / Archiv für Lebensmittelhygiene is the property of Presse Dienstleistungsges. mbH & Co. KG and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

With the new technological innovations in the food industry, consumer habits have been shifted from conventional processing towards minimal processing techniques which provide more nutritious food with improved sensory attributes. In recent years, among minimal processing techniques, sous-vide technology and high hydrostatic pressure effects on the quality and safety of meat products have had a growing attention among researchers. This paper aims to highlight the possibilities of a combination of both techniques hurdles which would act as innovative hurdle systems for meat preservation. Recently sous vide technology has had an increasing application for meat processing in the catering industry, restaurants, and households. This technique provides meat products with higher water-holding capacity, minimal impact on nutritional properties, and better sensory characteristics. Sous vide technology is an example of a hurdle system that includes vacuum packaging, mild heat treatment, and rapid chilling of meat. However, applying such mild heat treatment could possibly present a food safety risk especially regarding heat-resistant microorganisms. In this regard, high hydrostatic pressure processing depending on pressure and time has been shown to be an effective technology for the inactivation of pathogenic bacteria in meat products without altering their sensorial and nutritional properties. Pressure treatments at 400 - 600 MPa have been shown effective in significantly decreasing the pressure-resistant Gram-positive bacteria such as Listeria monocytogenes, and Staphylococcus aureus. However, it has been reported that very high-pressure treatments could potentially cause changes in the texture and color properties of the meat. This review could help in developing innovative hurdle systems using the combination of sous vide and high hydrostatic pressure as minimal processing technologies for the preservation of meat products. However, it is necessary to optimize the pressure and heating parameters and the order of the minimal processing techniques to achieve safe and high-quality meat products. [ABSTRACT FROM AUTHOR]

The effect of different sous-vide cooking temperature-time combinations on beef steak's microbiological, physicochemical, and organoleptic parameters were analysed. The organoleptic quality of souse-vide beef steaks was excellent. The sous-vide cooking had a considerable impact on the physical and chemical parameters of the product. The amino acid composition of the sous-vide cooked meat was similar to the original fresh beef. Souse-vide meat cooking does not denature proteins as much as conventional cooking and frying. In some cases, the microbiological parameters exceeded the expected legislation limit. We recommend additional antimicrobial barriers, such as lower pH and antimicrobial extracts from ginger in a concentration of 0.5 – 1.5% of the weight of fresh meat, combined with garlic powder. The final product had an extended shelf life compared to control samples prepared by boiling and frying.

Sous vide is a low-temperature long-time technique performed under vacuum conditions. This technique is being followed for various food products such as fruits, vegetables, meat, seafood, etc. These foods contain different naturally present components having nutritional, functional and phytochemical properties that act as a good source of bioactive compounds. The bioactive compounds possess various therapeutic properties produced due to their diversified biological effects and that is why are essential for human health. Cooking alters the content and composition of the food components by reducing these through thermal degradation or augmenting their concentration with respect to raw material. Sous vide technique is considered as the best method for prevention and preservation of these compounds after the product has been cooked. The main aim of this review article is to delineate the effect of sous vide processing on the quality and safety of various food products. This writeup mainly reflects various processing methods employed by the researcher for cooking of foods such as meat, seafood, vegetables, etc. Additionally, some of the nutritional and microbial attributes associated with this type of cooking are also highlighted in comparison to other traditional cooking methods. Sous vide cooking is generally employed below 70 °C for meat and seafood products whereas for vegetables the temperature ranges from 85 to 100 °C. During sous vide cooking, the cell structure of meat and seafood products remains quite intact due to minimum protein-protein interaction and gelation. Further, higher water-holding capacity provides tenderness and juiciness to the products. In vegetables this method encourages the bioaccessibility and bioavailability of vitamins, minerals, phytochemicals, etc. Therefore, its utilization has been increasing tremendously especially in commercial kitchens. • Sous vide is a vacuum based low temperature long time cooking method • Meat and sea products are operated at below 70 °C while vegetables above 85 °C • Sous vide cooked meat products have intact cell structure and are more tender, juicy • Encouraged bioaccessibility and bioavailability of phytochemicals in vegetables [ABSTRACT FROM AUTHOR]

The effect of different sous-vide cooking temperature-time combinations on beef steak's microbiological, physicochemical, and organoleptic parameters were analysed. The organoleptic quality of souse-vide beef steaks was excellent. The sous-vide cooking had a considerable impact on the physical and chemical parameters of the product. The amino acid composition of the sous-vide cooked meat was similar to the original fresh beef. Souse-vide meat cooking does not denature proteins as much as conventional cooking and frying. In some cases, the microbiological parameters exceeded the expected legislation limit. We recommend additional antimicrobial barriers, such as lower pH and antimicrobial extracts from ginger in a concentration of 0.5 - 1.5% of the weight of fresh meat, combined with garlic powder. The final product had an extended shelf life compared to control samples prepared by boiling and frying. [ABSTRACT FROM AUTHOR]

Consumption of unprocessed meat products in the conditions of increasing and subsequent preservation of achieved meat production volumes in the Russian Federation is continue to increase. At present, semi-finished products occupied first in the overall structure of production and consumption meat products, having overtaken in aggregate all types of processed products. In the background of increasing competition between domestic producers, the requirements for the packaging of the main types of unprocessed products – cuts and lumpy semi-finished products – will be continue to increase as an important driver of sales. Research studies play an important role in the development of packaging solutions for industry. This review focuses on the main areas of scientists studying from different countries. Modern scientific achievement in the field of vacuum packaging for chilled meat and semi-finished products including heat-shrinkable materials and skin packaging are presented. Special attention was paid to the forming safety and quality indexes of meat products, as well as functionality and «barrier» of packaging materials. Basic aspects of modified atmosphere packaging with different gas mixture including monoxide carbon and high oxygen using to maintain the desirable bright red color meat are considered.The further directions for development of technology sous-vide are discussed, as well as active and intelligent packaging. The search for new ideas in the field of active and smart packaging will help for better controlling shelf life, regulating freshness and maintaining stable quality of meat products.

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Abstract Sous vide foods can be divided into categories depending on the magnitude of the heat treatment they are given. Pathogens may remain in very lightly processed products so the quality of the initial materials is vital and products should be consumed shortly after preparation. Products not for immediate consumption rely on a pasteurising heat treatment followed by chilled storage for safety and preservation. It is recommended that sous vide foods with a shelf-life of ≤10 days are pasteurised at 70 °C for 2 min or equivalent aimed at achieving a 6 log reduction of the most heat resistant vegetative pathogen, Listeria monocytogenes. Products with a shelf-life of >10 days should be subjected to a heat treatment of 90 °C for 10 min or equivalent aimed at achieving a 6 log reduction of spores of Group II (nonproteolytic) C. botulinum. Recent years have seen an increase in the number of sous vide foods being cooked at low temperatures (e.g. 40 °C to 70 °C). Such temperatures have traditionally been considered to be in the “temperature danger zone” for foods and thus their effect on bacterial behaviour have not been studied greatly. This creates difficulties when assessing product safety. In this article we discuss the application of predictive models for inactivation or growth of bacteria to sous vide foods. We explain some basic mathematical and biological principles underlying predictive microbiology, show how existing models may be applied to sous vide products, and highlight some of the limitations of current modelling approaches particularly for long time low temperature processes. [ABSTRACT FROM AUTHOR]

Sous-vide is an appropriate technique to be used in cuts of meat such as beef shank, which are inexpensive and unappetizing due to their low tenderness. In the present work, time (2, 5, 8, 12, and 24 h) and temperature (55, 65, and 75 °C) combinations were applied to the beef shank cut for s ous-vide cooking. Its influence on physicochemical and sensory parameters was studied and compared with a reference meat cut (loin) cooked for 5 h at 65 °C. The results show that at higher temperatures and time-cooking, sous-vide reaches a greater tenderness on beef shank cuts, but with juiciness loss. Therefore, a compromise between these two parameters must be reached. A sous-vide treatment at 55 °C for 24 h resulted in meat with microbioal safety and an instrumental texture, tenderness, stringiness, chewiness, juiciness, and sensory color like loin which is the reference cut. • Sous-vide cooking increases the value of second category meat cuts. • Cooking temperatures of 55 °C under vacuum can be adequate. • Prolonged cooking allows obtaining products with good sensory quality and microbial safety. [ABSTRACT FROM AUTHOR]

The effect of sous-vide (S-V), microwave cooking (M) and stewing (S) on the fatty acid profile and lipid indices of goose meat was investigated. The research material involved breast muscles (24 with skin and 24 without skin) cut from carcasses of 17-week-old females "Polish oat geese." Gas chromatography was used to establish the fatty acid profile and lipid indices were calculated. The kind of heat treatment and the type of goose meat (muscles with- and without skin) affected the fatty acid profile and lipid indices. The sum of SFA was higher in S-V, M, and S samples for both kinds of meat than in raw ones. The cooked samples with skin had a lower percentage of Ʃ SFA than the skinless meat. S-V and M cooking (for meat with skin) caused an increase, while in the case of S heating (for both kinds of meat) there were no significant differences in Ʃ MUFA compared to raw samples. The S-V, M, and S meat with skin was characterized by a higher value of Ʃ MUFA than skinless ones. The Ʃ PUFA was lower in S-V and M than in raw meat, wherein this decline was higher for M ones (for both kinds of meat). The M meat with skin had the lowest and S without skin the highest share of Σ PUFA. Heat treatment caused an increase in Σ PUFA n-6/n-3 ratio, the lowest value was shown by the S-V muscles. Sous-vide cooking was more beneficial for consumers than the remaining methods in terms of Σ DFA/Σ OFA, Σ UFA/Σ SFA, NVI, health-promoting index (HPI), inflammatory biomarker indexes, and Σ SFA, Σ OFA, Σ UFA, Σ DFA values for meat with skin (but not all of these were significant). In turn, stewing of meat without skin was more favorable than S-V and microwave cooking in relation to indexes such as: Σ DFA/Σ OFA, Σ UFA/Σ SFA, Σ PUFA/Σ SFA, PI, UI, AI, TI, HPI. [ABSTRACT FROM AUTHOR]

Abstract: The effects of desalting and boiling, with or without vacuum-packaging, on the composition of the subcutaneous adipose tissue of dry-cured pork forelegs were investigated. The adipose tissue contained 7.1% water and 91.0% lipids. The main fatty acids in glycerides (about 89% of total lipids) were oleic (39.6%), palmitic (23.9%), linoleic (13.7%) and stearic (12.6%) acids. The main fatty acids in free fatty acids (about 11% of total lipids) were oleic (36.0%), linoleic (28.4%) and palmitic (13.1%). The culinary treatment (desalting and boiling) caused significant decreases in dry matter and lipid contents. These decreases were not as great in vacuum-packaged samples because the lipid losses were prevented during the boiling stage. No significant changes in lipid fraction proportions (glycerides and free fatty acids) were observed. The samples boiled with vacuum-packaging showed higher contents of polyunsaturated fatty acids than did the samples boiled without vacuum-packaging. [Copyright &y& Elsevier]

Abstract: There has been a substantial increase in sales of pasteurised in-pack chilled products over the last decade. It is anticipated that this trend will continue. These foods address consumer demand in being of high quality and requiring little preparation time. The microbiological safety of these foods commonly depends on a combination of a minimal heat treatment, refrigerated storage and a restricted shelf-life. The principal microbiological safety hazard for pasteurised in-pack meat products is foodborne botulism, as presented by non-proteolytic Clostridium botulinum. This review provides a summary of research that has contributed to the safe development of these foods without incidence of botulism. [Copyright &y& Elsevier]

The food industry has been slow in harnessing technological developments to expand opportunities and benefit the community. One such opportunity is in the application of proteolytic enzymes to the development of softer-textured meat products that require reduced mastication force, for those with impaired dentition, and reduced strength including older adults. Proteolytic enzymes haven't been fully explored for their potential in this area. Here a response surface methodology (RSM) was applied to model the interactive effects of sous-vide and papain application on texture, color, and cooking loss of meat. An innovative meat product formulation with a reduced toughness (120 min cooking sous-vide and 0.01 mg papain/100 g) was optimized and the technological performance of the formulation was validated. Bias values of the optimized model were in the range of 0.97 to 1.06, while accuracy factors for shear force values, chewiness, TPA hardness, cooking loss, color parameters ranged from 1.00 and 1.06, both of which metrics indicated the reliability of the resultant models. [Display omitted] [ABSTRACT FROM AUTHOR]

The impact of sous-vide cooking (So-Vc) temperature and time on the quality and shelf-life of crab lump meat (CLM) was elucidated. CLM was treated with sous-vide at varying temperatures (75, 80 and 85 °C) and times (1 and 2 h). Regardless of the cooking regime, no microorganisms were detected in CLM after treatment with So-Vc (svt-CLM). Lipid oxidation became more pronounced in svt-CLM as time and temperature augmented (p < 0.05). No significant alterations in protein pattern were observed in svt-CLM. Lightness in CLM was increased after treatment with sous-vide, except for those treated at 85 °C, in which lightness was decreased. A gradual decrease in poly- and mono-unsaturated fatty acid with increasing temperature and time was observed for svt-CLM. So-Vc profoundly influenced the shelf-life of CLM, in which the shelf-life longer than 60 days at 4 °C was recorded. Therefore, So-Vc was demonstrated as an effective mild heat treatment for shelf-life extension of CLM, and the cooking condition of 80 °C for 1 h is recommended for CLM based on the less impact on color and lipid oxidation, assured microbial safety, and reduced energy consumption. • Sous-vide cooking inactivated microorganisms in crab lump meat. • Sous-vide treatment induced lipid oxidation in crab lump meat. • Sous-vide treatment extended the shelf-life of crab lump meat to more than 60 days. • Protein pattern of crab lump meat was not affected by sous-vide treatment. [ABSTRACT FROM AUTHOR]