Probiotic culture survival and implications in fermented frozen yogurt characteristics

被引:90
作者
Davidson, RH [1 ]
Duncan, SE [1 ]
Hackney, CR [1 ]
Eigel, WN [1 ]
Boling, JW [1 ]
机构
[1] Virginia Polytech Inst & State Univ, Dept Food Sci & Technol, Blacksburg, VA 24061 USA
关键词
frozen yogurt; probiotic; bifidobacteria; acidophilus;
D O I
10.3168/jds.S0022-0302(00)74927-7
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
Low-fat ice cream mix was fermented with probiotic-supplemented and traditional starter culture systems and evaluated for culture survival, composition, and sensory characteristics of frozen product. Fermentations were stopped when the titratable acidity reached 0.15% greater than the initial titratable acidity (end point 1) or when the pH reached 5.6 (end point 2). Mix was frozen and stored for 11 wk at -20 degrees C. The traditional yogurt culture system contained the strains Streptococcus salivarius ssp. thermophilus and Lactobacillus delbrueckii ssp. bulgaricus. The probiotic-supplemented system contained the traditional cultures as well as Bifidobacterium Longum and Lactobacillus acidophilus. We compared recovery of Bifodobacterium by three methods, a repair-detection system with roll-tubes and plates on modified bifid glucose medium and plates with maltose + galactose reinforced clostridial medium. Culture bacteria in both systems did not decrease in the yogurt during frozen storage. The roll-tube method with modified bifid glucose agar and repair detection system provided at least one-half log(10) cfu/ml higher recovery of B. longum compared with recoveries using modified bifid glucose agar or maltose + galactose reinforced clostridial agar on petri plates. No change in concentrations of lactose or protein for products fermented with either culture system occurred during storage. Acid flavor was more intense when product was fermented to pH 5.6, but yogurt flavor was not intensified. The presence of probiotic bacteria in the supplemented system seemed to cause no differences in protein and lactose concentration and sensory characteristics.
引用
收藏
页码:666 / 673
页数:8
相关论文
共 25 条
[1]   IMPROVED RECOVERY OF STRESSED BIFIDOBACTERIUM FROM WATER AND FROZEN YOGURT [J].
ARANY, CB ;
HACKNEY, CR ;
DUNCAN, SE ;
KATOR, H ;
WEBSTER, J ;
PIERSON, M ;
BOLING, JW ;
EIGEL, WN .
JOURNAL OF FOOD PROTECTION, 1995, 58 (10) :1142-1146
[2]  
BAIG MI, 1995, J DAIRY FOODS HOME S, V15, P99
[3]  
Chandan R., 1998, Journal of Dairy Science, V81, P17
[4]  
CHANDAN RC, 1992, DAIRY SCI TECHNOLOGY, V2, P1
[5]  
DAVIDSON RH, 1995, THESIS VIRGINIA POLY
[6]   EFFECT OF VIABLE STARTER CULTURE BACTERIA IN YOGURT ON LACTOSE UTILIZATION IN HUMANS [J].
GILLILAND, SE ;
KIM, HS .
JOURNAL OF DAIRY SCIENCE, 1984, 67 (01) :1-6
[7]   ACIDOPHILUS MILK-PRODUCTS - A REVIEW OF POTENTIAL BENEFITS TO CONSUMERS [J].
GILLILAND, SE .
JOURNAL OF DAIRY SCIENCE, 1989, 72 (10) :2483-2495
[8]   EFFECT OF SUGAR AND ACID ON THE ACCEPTABILITY OF FROZEN YOGURT TO A STUDENT POPULATION [J].
GUINARD, JX ;
LITTLE, C ;
MARTY, C ;
PALCHAK, TR .
JOURNAL OF DAIRY SCIENCE, 1994, 77 (05) :1232-1238
[9]  
Hauge B., 1981, Meieriposten, V70, P665
[10]   SURVIVAL OF LACTOBACILLUS-ACIDOPHILUS AND BIFIDOBACTERIUM-BIFIDUS IN ICE-CREAM FOR USE AS A PROBIOTIC FOOD [J].
HEKMAT, S ;
MCMAHON, DJ .
JOURNAL OF DAIRY SCIENCE, 1992, 75 (06) :1415-1422