scholarly journals Survivability of Lactobacillus acidophilus and quality attributes of puffed pounded-unripe rice supplemented with probiotics using a fluidized-bed coating method

Food Research ◽  
2021 ◽  
Vol 4 (S4) ◽  
pp. 73-80
Author(s):  
W. Duangkhamchan ◽  
P. Itsaranuwat
Keyword(s):  
Cell Count ◽  
Fluidized Bed ◽  
Lactobacillus Acidophilus ◽  
Survival Rates ◽  
Skim Milk ◽  
Value Added ◽  
Textural Properties ◽  
Thiobarbituric Acid ◽  
Fluidized Bed Coating ◽  
Coating Method

Value-added breakfast cereals are receiving increased interest due to changes in lifestyles and modern trends of health awareness among consumers. Among various cereal grains, puffed pounded-unripe rice (PPUR) was chosen because of its excellent health beneficial properties. Feasibility of supplementing the probiotic bacteria Lactobacillus acidophilus (LA5) into PPUR was investigated using a fluidized-bed coating method. Suitable fermentation conditions were tested based on a pH criterion of 4.5. Three types of cell host solutions as sucrose, skim milk and maltodextrin were examined as suitable carriers, and optimal coating condition was determined. Product qualities were evaluated for stability. Results showed that milk fermented for 24 hrs gave the highest viable cell count of approximately 109 to 1010 CFU/mL when optimally mixed with distilled water at milk: water ratio of 45:105. Skim milk was determined as the most suitable host giving the highest retention of LA5 cell count. Coating condition at a feed rate of 10 mL/min, coating time of 5 mins and constant temperature at 50°C gave the highest survival rates of LA5. Moisture contents and water activity (aw) values of all coated products ranged from 3.38-3.72% wb and 0.201-0.232, respectively. Regarding textural properties, coated PPUR showed increased hardness and crispiness compared with uncoated samples, while the variation of coating conditions had no significant effects. Dynamic changes in viable LA5 cell count, textural properties, aw, peroxide value and thiobarbituric acid values fitted well with various kinetic orders. Findings indicated the feasibility of adding probiotics to dry products associated with suitable coating solution and offered guidance for product development and process design.

Survival and residual activity ofLactobacillus acidophilusfrozen cultures under different conditions

1996 ◽  
Vol 63 (2) ◽  
pp. 295-303 ◽  
Author(s):  
Roberto Foschino ◽  
Enrico Fiori ◽  
Antonietta Galli
Keyword(s):  
Lactobacillus Acidophilus ◽  
Total Population ◽  
Storage Temperature ◽  
Lactic Acid Production ◽  
Survival Rates ◽  
Residual Activity ◽  
Skim Milk ◽  
Selective Media ◽  
Active Population ◽  
Fermentative Activity

SummaryEight strains of theLactobacillus acidophiluscomplex were subjected, as concentrated cultures in skim milk, to different freezing treatments (rapidly in liquid nitrogen and more slowly in cold air at −30 °C), then stored at −80 and −30°C for 9 months. Survival was determined by plate counting with and without bile salts or sodium chloride at the highest tolerated concentration for each strain, to distinguish the undamaged population from the total population. Fermentative activity was measured as total lactic acid production by thawed cultures under standard conditions. Higher survival rates and greater activity were always obtained by storing cultures at −80 °C, but most strains stored at −30°C also survived well. Analysis of variance revealed that the viability of the frozen cultures was affected more by storage temperature than by cooling rate. Selective media were unable to distinguish the active population from the total surviving population. The correlation between values for activity and survival with selective media was poor.

Monte Carlo simulations to determine coating uniformity in a Wurster fluidized bed coating process

2006 ◽  
Vol 166 (2) ◽  
pp. 81-90 ◽  
Author(s):  
KuZilati KuShaari ◽  
Preetanshu Pandey ◽  
Yongxin Song ◽  
Richard Turton
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Fluidized Bed ◽  
Coating Process ◽  
Fluidized Bed Coating ◽  
Coating Uniformity

Effect of Process Variables on Efficiency and Particle Growth of Spilanthes oleracea Seeds Coating

2010 ◽  
Vol 660-661 ◽  
pp. 419-425 ◽  
Author(s):  
C.M.L. Costa ◽  
L.J.G. Faria ◽  
Cristina dos Santos Rocha Sandra
Keyword(s):  
Fluidized Bed ◽  
Flow Rate ◽  
Particle Growth ◽  
Process Variables ◽  
Relative Growth ◽  
Coating Efficiency ◽  
Fluidized Bed Coating ◽  
Common Technique ◽  
Coating Suspension ◽  
Granule Growth

The coating of vegetable seeds is a very common technique, mainly for the species which have small seeds. One of its functions is to increase the seed size to direct sowing. In the present study the coating of Spilanthes oleracea L. seeds with a polymeric suspension in fluidized bed was analyzed. The effects of process variables on the coating efficiency of top-spray fluidized bed coating were evaluated. The independent variables studied were the flow rate of coating suspension and the air mass flow. The quantification for the entrance variables influence on the coating efficiency and granule growth, as well as the identification of optimal conditions were made by means of an experiment factorial design technique. Polynomial models for the responses: efficiency and relative growth of the particles were deduced. The highest coating efficiency was achieved at a high flow rate of coating suspension.

scholarly journals Dry Coating Method Using Magnetically Assisted Impaction in a Randomly Turbulent Fluidized Bed

1997 ◽  
Vol 15 (0) ◽  
pp. 121-131 ◽  
Author(s):  
Rajiv K. Singh ◽  
Ali Ata ◽  
James Fitz-Gerald ◽  
Yakov Rabinovich ◽  
W. Hendrickson
Keyword(s):  
Fluidized Bed ◽  
Dry Coating ◽  
Turbulent Fluidized Bed ◽  
Coating Method ◽  
Magnetically Assisted
Sign in / Sign up

Export Citation Format

Share Document