PubMed · 5796292
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G M Montag, V M Tamashunas. 1969. Engineered kitchen layout planning and design.. https://pubmed.ncbi.nlm.nih.gov/5796292/
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This study investigated the evolution of eating quality (colour, texture and volatile flavour compounds), water status, microstructure and protein structure of pork meat under different cooking methods. The methods analysed included traditional cooking (TC: 10, 20, 30 and 40 min, 100 °C), sous-vide cooking (SV: 1, 2, 3 and 4 h, 60 °C) and micro-pressure cooking (MC: 10, 20, 30 and 40 min, 120 °C). Across the three cooking processes, as cooking time increased, cooking loss, lightness, yellowness, P23, β-sheet, random coil and surface hydrophobicity of the meat samples increased. By contrast, redness, P22, hydrogen proton density, esters content, α-helix, β-turn and sulfhydryl group content decreased. Moreover, the Warner-Bratzler shear force (WBSF), adhesiveness, hardness, springiness, gumminess, chewiness, alcohols, aldehydes, ketones and fluorescence intensity of the meat samples, initially increased and then decreased as cooking progressed. SV resulted in higher water-holding capacity (WHC), improved redness and increased alcohol and ester levels, whereas MC produced softer meat and greater water mobility. Furthermore, MC enhanced the degree of microstructural damage and protein structural unfolding in the meat. MC requires less time to achieve textures and flavours similar to those obtained using the TC and SV methods. Thus, MC is an efficient cooking method for the catering industry to obtain desired meat quality rapidly.
Food processing has the potential to alter the nutrient quality of foods. This review deals with the effects of home-based cooking and storage practices on the micronutrient content of foods. It describes the effects of cooking, freezing and refrigeration on the vitamin and mineral content of meats, fish, fruit, vegetables and cereals. Based on this review, we suggest that the consumer should be aware of the possibility that losses in nutritional quality of foods may result from an improper use of cooking and storage techniques available at home.
The nutritional value of 50 home-prepared meat-based baby meals for infants of 7 and 8 months old in Madrid was evaluated. Chemical analysis showed the meals to have a low energy density (mean 50 kcal 100 g-1), mainly due to the low fat content of the meals (mean 2.5 g 100 kcal-1). Protein content was high in proportion to the energy provided (mean 9.1 g 100 kcal-1). The addition of fat would have considerably improved the relation between the three macronutrients. About 20% of the meals had a higher than desired sodium level (> 200 mg 100 kcal-1) when assessed against guidelines for commercial baby meals. The English home-made baby meals had a higher energy density, a lower protein content, the same low fat content, and a wider range between minimum and maximum values observed for each nutrient compared to the Spanish home-prepared meals. The commercial baby meals had a higher energy density, a better ratio between the macronutrients and a smaller variation in the nutrient content.