Upload
james-shebib
View
29
Download
4
Embed Size (px)
Citation preview
RESEARCH POSTER PRESENTATION DESIGN © 2012
www.PosterPresentations.com
Increase the shelf-life of chicken –
Major World protein source
Wider Distribution network
MAP is one of the current industry
standards, replacement of
atmosphere with a pre-determined
gas composition
Ultraviolet radiation-C : 254nm,
inhibits bacterial multiplication
and cell death
Nisin : Bacteriocin, inhibits cell
wall synthesis
Rosemary Oil : 1,8 cineole,
Camphor, α- Pinene, β- Pinene,
Camphene
Antimicrobial,
Increase ATP leakage by cell
permeability
INTRODUCTION
OBJECTIVES
The actual analytical test carried out on the samples included Gas analysis,
Colorimetry, Microbiological Analysis (Aerobic and Anaerobic plate
counts) followed by pH readings.
MATERIALS & METHODS
RESULTS (Cont.) CONCLUSION
This study gave a variety of information in regards to the effect
of the pretreatments utilized on the shelf life of MAP chicken
and the various characteristics used to determine spoilage. The
Nisin pretreatment was observed to have the longest shelf life
of all pretreatments in all tests carried out from organoleptic to
microbiological. The difference in the shelf life between the
pretreatment groups and the control was however statistically
insignificant.
REFERENCES• Arvanitoyannis, I. & Stratakos, A. (2012) Application of Modified Atmosphere Packaging and Active/Smart
Technologies to Red Meat and Poultry: A Review. Food and Bioprocess Technology. 5(5)
• Bhatt, A.A., Ahmed, A., Dar, M.A., Achir, & Pagrut, A. (2015). Effect of different levels of Nisin on the microbial
quality of chicken cutlets. Journal of Livestock Science. 6, 47-51
• Cichoski, A. J., Moura, H. C., SIlva, M. S., Rampelotto, C., Wagner, R., Barin, J. S. Costa, M. A. (2015). Oxidative
and Microbiologicaal Profiles of Chicken Drumsticks treated with Ultraviolet-C Radiation. Journal of food
Processing and Preservation, 1-11
• Giarratana, F., Muscolino, D., Beninati, C., Ziino, G., Giuffrida, A. & Panebianco, A. (2013) Effects of thyme and
rosemary essential oil on microbiology and shelf life of Italian Mortadella. Fleisch Wirtschaft International:
Research & Development.
• McMillin, K. (2008). Where is MAP Going? A review and future potential of modified atmosphere packaging for
meat. Meat Science, Volume 80, Issue 1, September 2008, Pages 43–65
• Mofidi, A.A, Rochelle, P.A., Chou, C.I. & Mehta, H. M. (2002) Bacterial Survival after Ultraviolet Light
Disinfection: Resistance, Regrowth and Repair. American Water Works Association. Research Gate: Conference
Paper.
ACKNOWLEDGEMENTSRobert Trenholm – Food Program Chair
Mr. Geoff Whiteway & Mr. Roy Perry – Technical Project Supervisors
Mrs. Mary Pippy – Statistical Advisor
Jim Strickland and Gary Harnum – Instructors & Advisors
Judy Perry – Resource Management
Carolyn Dwyer and Susan & Ryan Pretty – Lab Expertise
Brian Gillett, Leslie Samson and all others
Fellow Advanced Diploma Colleagues
Extend currently expected shelf life
Evaluate the extent of spoilage upon storage
Ensure quality attributes (Aroma, color)
Nisin, Rosemary Oil, UV-C as Pre-treatments
Extending the Shelf-life of Modified Atmosphere Packaged Chicken :
CHICKEN SECTIONING
PRE-TREATMENT APPLICATION
PACKAGING OF SAMPLES USING MAP
APPLICATION OF ULTRAVIOLET RADIATION
STORAGE OF SAMPLES AT 40C
ANALYSIS OF SAMPLES
MATERIALS & METHODS (Cont.)
GAS ANALYSIS
COLORIMETRY READING
MICROBIAL TESTING
ORGANOLEPTIC TESTING
DRIP ANALYSIS
pH READING
Flow chart of Experimental Testing progression during each sampling
period.
Image of gas analyzer (on
the left) used in the project
and the Colorimeter (on the
right)
Image of UV-C Chamber
utilized for the project.
MAP Packaging Machine
Tri-gas Blender
Bar charts illustrating the color
values obtained for each group
of chicken samples over the
duration of the experiment.
Microbiological data obtained for all treatment groups over the
experimental period for Aerobic plate counts
Microbiological data obtained for all treatment groups over the
experimental period for Anaerobic plate counts
16.12 (107 cfu/g) -
cutoff point for
spoilage of samples
16.12 (107 cfu/g) -
cutoff point for
spoilage of samples
Values in red are Day 0 data
collected from the initial
chicken samples.
Treatment
Group
Sample
PeriodOrganoleptic
M 1/12/2016 Acceptable
M 1/15/2016 Acceptable
M 1/18/2016 Acceptable
M 1/21/2016 Unacceptable
M 1/24/2016 Unacceptable
M 1/27/2016 Unacceptable
M + U 1/12/2016 Acceptable
M+ U 1/15/2016 Acceptable
M+ U 1/18/2016 Acceptable
M+ U 1/21/2016 Unacceptable
M+ U 1/24/2016 Unacceptable
M+ U 1/27/2016 Unacceptable
M + U+ N 1/12/2016 Acceptable
M + U+ N 1/15/2016 Acceptable
M + U+ N 1/18/2016 Acceptable
M + U+ N 1/21/2016 Acceptable
M + U+ N 1/24/2016 Acceptable
M + U+ N 1/27/2016 Acceptable
M + U + R 1/12/2016 Acceptable
M + U + R 1/15/2016 Acceptable
M + U + R 1/18/2016 Unacceptable
M + U + R 1/21/2016 Unacceptable
M + U + R 1/24/2016 Unacceptable
M + U + R 1/27/2016 Unacceptable
Below: Results of the organoleptic analysis of chicken samples over
testing period
M : MAP
M + U : MAP & UV-C
M + U + N : MAP, UV-
C, Nisin
M + U + R : MAP, UV-
C,
Rosemary Oil
*Acceptable- Smell was
not offensive
*Unacceptable- Smell
was offensive.
Rosemary oil- 0.20%
Nisin – 100 IU/g
UV-C dosage- 7.2 kJ/m2 RECOMMENDATIONS
Utilize Nisin pretreatment in increased concentrations (200
– 400 IU/g)
Utilize two temperature ranges (4 & 10 oC) to simulate how
abusive temperature would affect the activity of
pretreatment.
Abandon the use of UV-C pretreatment of samples due to
the negative results obtained.
Exert more control over samples used in the experiment by
ensuring samples are obtained from abattoirs rather than
stores.
Use mechanical marination for chicken samples to reduce
possible sources of contamination.
Results Summary: The results obtained in this
experiment suggest that none of our treatments were
effective in extending the shelf life of MAP chicken
significantly. However, the MAP control group samples
lasted 10.5 Days, with the MAP, UV-C & Rosemary
lasting 10.2 days and the MAP and UV-C group lasted
9.8 days. The Nisin pretreatment group samples lasted
the longest with spoilage occurring after 11.4 days as
predicted by the regression model.
Rudean Grant – [email protected]
Sri Geetha Koduri – [email protected]
James Shebib – [email protected]
RESULTS
‘L’-Lightness
‘a’-Redness
‘b’- Yellowness
Pour Plate Method –
MFHPB-18
Standard Agar Media