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Liquid-holding capa...
Liquid-holding capacity and structural changes in comminuted salmon (Salmo salar) muscle as influenced by pH, salt and temperature
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Ofstad, R. (author)
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- Kidman, Siw (author)
- RISE,SIK – Institutet för livsmedelsforskning
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Myklebust, R. (author)
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Olsen, R.L. (author)
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- Hermansson, Ann-Marie (author)
- RISE,SIK – Institutet för livsmedelsforskning
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(creator_code:org_t)
- 1995
- 1995
- English.
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In: Lebensmittel-Wissenschaft + Technologie. - 0023-6438 .- 1096-1127. ; 28:3, s. 329-339
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Abstract
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- The loss of liquid in salmon muscle comminuted with salt was studied as a function of pH and heating temperature. A factorial experiment was designed to compare the effects of; the raw material, NaCl concentration, pH, degree of comminution and heating temperature in order to evaluate both main effects and interaction effects. The liquid-holding capacity was measured by a low speed centrifugation net test. The changes in microstructure in the samples were investigated by light microscopy using fat- and protein-staining techniques. The heating temperature, pH, NaCl concentration, variation of raw material and degree of comminution influenced liquid loss according to a second-order interaction linear model. The interaction effect between low pH, low salt concentration and high temperature was strongest. Addition of salt extracted the myofibrillar proteins and resulted in a homogeneous protein matrix with few intact fibres and uniformly dispersed fat droplets. Liquid loss was closely related to the microstructure of the comminutions. When heated above 30 °C, enlarged pores and gaps, some of them forming channels, occurred in the protein matrix. In comminutions prepared with a low salt concentration and/or a low pH the more frequent presence of pores and gaps enhanced the liquid loss. © 1995 Academic Press Limited.
Subject headings
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Livsmedelsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Food Science (hsv//eng)
Keyword
- Food Engineering
- Livsmedelsteknik
Publication and Content Type
- ref (subject category)
- art (subject category)
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