FUNCTIONAL-PROPERTIES OF SOY PROTEIN ISOLATES AS AFFECTED BY HEAT-TREATMENT DURING ISOELECTRIC PRECIPITATION

被引:7
作者
DEOGARA, MCL [1 ]
DELAYNO, MD [1 ]
PILOSOF, AM [1 ]
MACCHI, RA [1 ]
机构
[1] UNIV BUENOS AIRES,FAC CIENCIAS EXACTAS & NAT,DEPT IND,BUENOS AIRES,ARGENTINA
关键词
FUNCTIONAL PROPERTIES; ISOLATION; PROCESSING EFFECT; SOYBEAN PROTEINS;
D O I
暂无
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Research was carried out on the influence of heat treatment during isoelectric precipitation on the functionality of the resulting isolates prepared from "low-heated," undenatured, defatted soy flour. The isoelectric dispersions were heated at 50-degrees-C, 60-degrees-C, 65-degrees-C or 70-degrees-C for 30 min and characterized for solubility, water absorption capacity, oil absorption capacity, viscosity and gel properties. The effect of heat treatment during isoelectric precipitation was reflected by all the functional properties. The soy isolate heated at 60-degrees-C showed remarkably different flow characteristics. It yielded the most viscous dispersions and the strongest gels and also the highest water absorption capacity value. Simple and multiple lineal regression models were used to provide a description of the relationship between the different properties studied. Significant correlations were found between gel viscosity and water absorption capacity. Gel characteristics also correlated significantly with viscosity of 20% dispersions. Viscosity of dispersions correlated to solubility or to water absorption capacity, depending on protein concentration. That dependence was quantified and a highly significant multiple correlation was found between viscosity and the independent variables of log solubility and water absorption capacity.
引用
收藏
页码:184 / 187
页数:4
相关论文
共 14 条
[1]  
DEOGARA MCL, 1986, J FOOD TECHNOL, V21, P279
[2]   PHYSICOCHEMICAL ASPECTS OF SOY PROTEINS STRUCTURE FORMATION [J].
HERMANSSON, AM .
JOURNAL OF TEXTURE STUDIES, 1978, 9 (1-2) :33-58
[3]   GEL CHARACTERISTICS - WATERBINDING PROPERTIES OF BLOOD-PLASMA GELS AND METHODOLOGICAL ASPECTS ON THE WATERBINDING OF GEL SYSTEMS [J].
HERMANSSON, AM ;
LUCISANO, M .
JOURNAL OF FOOD SCIENCE, 1982, 47 (06) :1955-&
[4]   FUNCTIONAL PROPERTIES OF OILSEED PROTEINS [J].
JOHNSON, DW .
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY, 1970, 47 (10) :402-&
[5]  
Kanterewicz R. J. de, 1987, Journal of Food Science, V52, P1381, DOI 10.1111/j.1365-2621.1987.tb14087.x
[6]  
Kinsella JE., 1985, NEW PROTEIN FOODS, V5, P107, DOI [10.1016/B978-0-12-054805-7.50012-9, DOI 10.1016/B978-0-12-054805-7.50012-9]
[7]  
Pour-El A., 1981, ACS Symposium Series, V147, P1
[8]  
Schmidt R. H., 1981, ACS Symposium Series, V147, P131
[9]   PHYSICAL-PROPERTIES OF PROTEIN PREPARATIONS RELATED TO THEIR FUNCTIONAL CHARACTERISTICS IN COMMINUTED MEAT SYSTEMS [J].
TORGERSEN, H ;
TOLEDO, RT .
JOURNAL OF FOOD SCIENCE, 1977, 42 (06) :1615-&
[10]   FLOW CHARACTERISTICS OF SOYBEAN CONSTITUENTS CONTROLLED BY RATIO OF TOTAL TO IMBIBED WATER [J].
URBANSKI, GE ;
WEI, LS ;
NELSON, AI ;
STEINBERG, MP .
JOURNAL OF FOOD SCIENCE, 1983, 48 (03) :691-694