Premium
FREEZE CONCENTRATION BY DIRECTIONAL COOLING
Author(s) -
KRAMER AMIHUD,
WANI KOHMEI,
SULLIVAN JAMES H.,
SHOMER ILAN
Publication year - 1971
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1971.tb04051.x
Subject(s) - front (military) , ice cream , total dissolved solids , chemistry , food science , mineralogy , environmental science , meteorology , environmental engineering , physics
— It is generally assumed that as food materials are frozen, soluble solids move ahead of the “ice front.’ Under conditions tested in these studies the above was true only when the ice front moved in a descending direction. Thus, when foods were frozen in an ascending direction (as on a plate freezer) there was little, if any, movement of solids. When the freezing surface was placed above the material to be frozen, there was a rapid downward movement of solids. This “solids descent’ was most apparent in true solutions such as drinks, and less apparent in structural cellular foods such as pieces of meat or potatoes. It is suggested that this phenomenon may be utilized for more efficient freeze drying or concentrating, or for the simultaneous production of low‐solids and concentrated foods, particularly beverages.