Iwona Wojtasik-Kalinowska

Applications of electronic noses in meat analysis

Electronic noses are devices able to characterize and differentiate the aroma profiles of various food, especially meat and meat products. During recent years e-noses have been widely used in food analysis and proved to provide a fast, simple, non-expensive and non-destructive method of food assessment and quality control. The aim of this study is to summarize the most important features of this analytic tool and to present basic fields and typical areas of e-nose use as well as most commonly used sensor types and patterns for e-nose design. Prospects for the future development of this technique are presented. Methods and research results presented in this manuscript may be a guideline for practical e-nose use.

Oxidative and microbial stability of poultry meatballs added with coriander extracts and packed in cold modified atmosphere

ABSTRACT The aim of the study was to determine the effects of adding of coriander extracts to turkey meatballs. Meat samples were stored in modified atmosphere at 4°C ± 1°C for 9 days. The addition of coriander extract at 500 ppm level delayed the process of lipid oxidation for the period of 6 days of storage and growth inhibition of aerobic microorganisms for the period of 9 days of storage. The usage of a dose of 500 ppm as well as a dose of 200 ppm had no significant effect on the sensory features, but had an impact on colour parameters of the meatballs. In the groups with coriander extract, volatile terpenes were identified.

Diet with linseed oil and organic selenium yields low n-6/n-3 ratio pork Semimembranosus meat with unchanged volatile compound profiles

The aim of this was to improve n-6/n-3 ratio without affecting the volatile compounds profiles of pork. Different feeding strategies were designed for 60 Polish Landrace pigs with the goal to enhance the health attributes of Polish pork. Composition, colour, hardness, fatty acid contents and volatile compound profiles of the semimembranosus muscles were determined. Results showed that with the basic diet with the addition 3% of linseed oil, 100 mg kg 1 of vitamin E and 1 mg kg 1 of organic selenium, the level of polyunsaturated fatty acids (PUFA) in the meat samples was increased by 26% (P ≤ 0.05) as compared to the control. Principal component analysis (PCA) demonstrated that the aroma profile of semimembranosus muscles from pigs fed with the diet supplemented with 3% of linseed oil and 1 mg kg 1 of organic selenium was close to that of control. Results demonstrated that healthy functional meats could be produced by designing feeding strategies.

Antioxidant effect of sage (Salvia officinalis L.) extract on turkey meatballs packed in cold modified atmosphere

ABSTRACT The aim of the study was to determine the influence of sage extracts (0.02% and 0.05%) on the quality of turkey meatballs packed in a modified atmosphere (80% O2; 20% CO2) and stored at 4°C over a period of 9 days. Sage extract added to meatballs had a high antioxidant capacity due to a phenolic compounds: 47.92 mg of gallic acid (GAE)/100 g dw including high flavonoids contents (20.47 mg GAE/100 g dw) and phenolic acids (8.14 GAE/100 g dw) contents. During the storage, lipid oxidation and microbial growth increased rapidly and the results showed that the influence of sage extract on meatballs was the most noticeable on the last day of storage. Furthermore, analysis of the volatile compounds indicated that the addition of sage extract delayed formation of lipid-derived products of oxidation through storage of the turkey meatballs. Sage extract has a potential as a natural preservative in the meat industry.

The sensory quality of allergen-controlled, fat-reduced, salt-reduced pork-ostrich sausages during storage

BACKGROUND New meat products tailored to consumer health should be characterised by reduced sodium, fat and cholesterol contents and other health-promoting benefits. However, the food sectors greatest challenge is allergen-free production. Consumers are not willing to compromise the sensory quality of meat products for health. The aim of the present study was to analyse the influence of the storage time on the physical properties and consumer acceptance of allergen-controlled, fat-reduced, salt-reduced pork-ostrich sausages. The study focused on pork-ostrich sausages produced in accordance with a new patented technology, which focused on eliminating cross-contamination on-line in the plant, eliminating cross-contamination after preparation, and eliminating spices with high allergy potential. The production was focused on reducing fat (by approximately 50%) and salt (by approximately 30%) levels. RESULTS No changes in the texture parameters of the sausage were observed during storage time; however, some changes in colour were observed. There were no significant differences in sensory consumer acceptability of pork-ostrich sausage after 14 days of storage; thus, it may be stated that the instrumentally assessed differences in colour did not influence consumer acceptance. CONCLUSION The applied fat and NaCl reduction in the pork-ostrich sausages contributed to high consumer ratings and was not correlated with saltiness acceptability.