(2016) Effect of packaging method and cold-storage time on chicken meat quality, CyTA -Journal of Food, 14:1, 41-46, DOI: 10.1080/19476337.2015 To link to this article: https://doi.org/10. 1080/19476337.2015 This study was performed to determine the effects of vacuum packaging (VP) and modified-atmosphere packaging (MAP) (CO 2 /N 2 = 3:7) on the physicochemical properties and sensory attributes in chicken breast meat during storage at 2ºC±0.5ºC for 5, 10 and 15 days. Results showed that storage time influenced the physicochemical properties, except sensory attributes, shear force and shear energy of chicken meat. The extended storage time was causing an increase in the pH value, drip loss and in values of color parameters (L, a* b*) in chicken meat. Moreover, the packaging method affected values of drip loss, cooking loss and shear force. Fresh meat (0 days of storage) was characterized by the highest overall quality assessed with the semi-consumer scaling method. Storage time and packaging method were found to exert significant effects on the physicochemical parameters determined instrumentally and on sensory attributes of meat evaluated with the semi-consumer scaling method.Keywords: chicken; meat quality; vacuum packaging; modified-atmosphere packaging Este estudio se realizó para determinar los efectos del envase al vacío (VP) y el envase en atmosfera modificada (MAP) (CO 2 /N 2 = 3:7) en las propiedades fisicoquímicas y los atributos sensoriales de la pechuga de pollo durante el almacenamiento a 2ºC ± 0,5ºC durante 5, 10 y 15 días. Los resultados mostraron que el tiempo de almacenamiento influenció en las propiedades fisicoquímicas, excepto en los atributos sensoriales, la fuerza cortante y el esfuerzo cortante de la carne de pollo. La extensión del tiempo de almacenamiento causó un aumento en el valor pH, la pérdida de goteo y los valores de los parámetros de color (L, a* b*) de la carne de pollo. Además, el método de envase afectó a los valores de pérdida de goteo, pérdida de cocción y fuerza cortante. La carne fresca (0 días de almacenamiento) se caracterizó por la mayor calidad total evaluada con el método de escala del semi-consumidor. Se observó que el tiempo de almacenamiento y el método de envase habían ejercido efectos significativos en los parámetros fisicoquímicos determinados de forma instrumental y en los atributos sensoriales de la carne evaluada con el método de escala

Summary This study evaluated several physical and sensory parameters of different types of cheese available in the Polish market. The measurements of textural properties were conducted in an Instron universal testing machine, while the colour properties of cheeses were measured using a Minolta chromameter. The chemical composition was determined by means of the near‐infrared spectroscopy (NIRs). Moreover, a trained sensory panel was invited to assess the cheese texture‐related properties. Generally, cheeses with reduced fat content were characterised by higher hardness, adhesiveness, cohesiveness and elasticity. Texture‐related parameters of cheese with canola oil were comparable to that of most of full‐fat cheeses. The correlation analysis between physical and sensory attributes related to cheese textural properties indicated the potential applications of TPA, shear and penetration tests (r = 0.766, r = 0.75 and r = 0.765, respectively) for the evaluation of sensory properties related to the hardness. Meanwhile, the elasticity of cheese obtained from sensory evaluation was strongly correlated with the elasticity determined from the shear test (r = 0.722) and moderately correlated with the elasticity from penetration test (r = 0.588), indicating a need to refine the method of penetration test. In addition, cheeses exhibited higher meltability during convection heating at 230 °C than microwave heating. The values of meltability for cheese with reduced fat content were lower than those of full‐fat cheese.

Summary The aim of this study was to investigate the impact of two convection–microwave heating (M100 and M30) on texture and colour properties, cooking yield and thermal shrinkage of bovine product (gluteus medius muscle) as compared with conventional roasting at constant temperature (P180 and P80) and roasting with ΔT program (Δ80 and Δ40). The product processed by the M100 method was characterised by high shear force (WBSF) and high compression force (TPA). The reduction of microwave intensity to 30% (roasting M30) could improve the tenderness of final product. In addition, microwave heating at the intensity of 30% shortened the roasting time, and the produced sample exhibited comparable process loss and heat shrinkage extent compared to those treated by the high‐temperature conventional roasting method (P180). The study indicated that combining of convection and low‐intensity microwave heating could be successfully used in catering business for beef roasting due to the shorter cooking time, reduced cooking loss and higher tenderness of meat.

The aim of this study was to determinate the influence of chemical coating treatments for quality maintenance of whole button mushrooms (Agaricus bisporus) during storage at 2 °C. Six different treatments [distilled water (C), E1: 0.3% CaCl2, E2: 2% CaCl2, E3: 0.1% chitosan in 1% citric acid, E4: 0.5% chitosan in 1% citric acid, E5: 0.1% chitosan in 0.5% acetic acid] were used. Physicochemical properties such as color, weight loss, texture, total antioxidant activity, and total phenolic content were monitored during 14 days. The results showed that the mushrooms treated with CaCl2 and chitosan solution in citric acid could be storage up to 14 days at 2 °C without significant deterioration in their quality. In contrast, coating with chitosan solution in acetic acid allows the mushroom to be stored for up to 4 days. Coatings do not protect mushrooms against excessive loss of phenolic compounds and their ability to reduce free radicals. Practical applications Physiological processes associated with maturation of mushrooms do not end after harvest. Shelf life of mushrooms is 3–4 days at room temperature (20–25 °C). In recent years, the method to extend the durability and quality of these products has become edible coatings. According to the presented results, it is possible to maintain the good quality of product up to 14 days for mushrooms washed with CaCl2 solutions.

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Marinating is one of the most common methods of pre-processing meat. Appropriate selection of marinade ingredients can influence the physicochemical properties of the meat and can reduce the level of polycyclic aromatic hydrocarbons (PAHs) in the final product. The effects of the inclusion of natural plant extracts such as bay leaf (BL), black pepper (BP), turmeric (TU), jalapeno pepper (JP) and tamarind paste (TA) in marinades on the physicochemical properties of grilled pork neck were studied. The addition of spice extracts to marinades increased the proportion of colour components L* and b*. The use of TU, TA, JP, MX and C marinades lowered the hardness and pH of the meat. The highest phenolic compound levels were observed in the case of the mixture of all extracts (MX) and JP marinades, and the highest total antioxidant capacity was exhibited by the BL and MX marinades. The highest PAH content was recorded in the CON marinade (Σ12PAH 98.48 ± 0.81 µg/kg) and the lowest in the JP marinade (4.76 ± 0.08 µg/kg), which had the strongest, statistically significant reducing effect (95% reduction) on PAH levels. Analysis of correlation coefficients showed a relationship between the total antioxidant capacity of the marinades and the PAH content in grilled pork.

The objective of the research was to determine the impact of combined effect of modified atmosphere packaging (MAP), used films and storage time on the shelf‐life improvement of button mushrooms (Agaricus bisporus). Four MAP groups, two types of films and control group (PVC wrap) were used. The scope of research included measurements of the weight loss, pH, color, veil opening, and texture as indicators of mushroom quality at the beginning, 4th, 7th, 11th, and 14th day of storage at 2°C. Statistically significant differences (p < 0.001) in all quality parameters depending on the time of storage were reported. Application in packages 10% and 20% oxygen (MAP2 and MAP4) and film of a thickness of 44 μm (F1) can inhibit the browning of the button mushrooms. The optimal conditions for extending the shelf life of mushrooms were found for packaging with 20%O2, 0%CO2, 80%N2 and film of a thickness of 44 μm. Practical applications Agaricus bisporus tend to lose quality right after harvest. Fresh mushrooms’ shelf life is limited to 1–3 days at ambient temperature and to 4–7 days at 4°C. According to the presented results, it is possible to maintain good quality of mushrooms up to 14 days for product packed in modified atmosphere with 10%O2, 5%CO2, 80%N2 and 20%O2, 0%CO2, 80%N2 and film of a thickness of 44 μm. These conditions can inhibit the browning of the button mushrooms.