Survival of bifidobacteria after spray-drying.
To investigate the survival of bifidobacteria after spray-drying, Bifidobacterium infantis CCRC 14633, B. infantis CCRC 14661, B. longum ATCC 15708, B. longum CCRC 14634 and B. longum B6 were first spray-dried with different carrier media including 10% (w/w) gelatin, gum arabic and soluble starch. B. infantis CCRC 14633 and B. longum were also determined in skim milk. It was found that survival of bifidobacteria after spray-drying varied with strains and is highly dependent on the carriers used. Among the test organisms, B. longum B6 exhibited the least sensitivity to spray-drying and showed the highest survival of ca. 82.6% after drying with skim milk. Comparisons of the effect of carrier concentrations revealed that spray-drying at 10% (w/w) gelatin, gum arabic or soluble starch resulted in the highest survival of bifidobacteria. In addition, among the various outlet-air temperatures tested, bifidobacteria showed the highest survival after drying at 50 degrees C. Elevation of outlet-air temperature caused increased inactivation of bifidobacteria. However, the inactivation caused by increased outlet-air temperature varied with the carrier used, with the greatest reduction observed using soluble starch and the least with skim milk.
Lian
Wen-Chian
WC
Graduate Institute of Food Science & Technology, National Taiwan University, Taipei.
Hsiao
Hung-Chi
HC
Chou
Cheng-Chun
CC
D000818:Animals; D001644:Bifidobacterium / Q000254:growth & development*; D015169:Colony Count, Microbial; D003890:Desiccation / Q000379:methods; D004305:Dose-Response Relationship, Drug; D005516:Food Microbiology; D005780:Gelatin / Q000494:pharmacology*; D006170:Gum Arabic / Q000494:pharmacology*; D008892:Milk / Q000382:microbiology; D012995:Solubility; D013213:Starch / Q000494:pharmacology*; D013696:Temperature
D006170:Gum Arabic; D005780:Gelatin; D013213:Starch