PRESERVATION OF FOOD BY
IRRADIATION
PRESENTED BY
ENA ATHAIDE
MSc- 1 BIOCHEMISTRY
INSTITUTE OF SCIENCE
Food Preservation
Meaning
Need
Causes of food spoilage
WHAT IS IRRADIATION
PROCESSING
Exposing food to gamma rays,
x-rays or electrons to improve
shelf life and safety.
Irradi...
RADIATIONS USED IN
PRESERVATION
Ultraviolet(UV light)
Beta Rays
Gamma Rays
X- Rays
Microwaves
Application of Radiation
Most widely used techniques
of irradiating food are gamma
radiation from CO60 and Cs
137
Electr...
RADIATION TREATMENT
OF FOOD
Radappertization : used in
canning industry , 30-40 kGy.
Radicidation:equivalent to
pasteuri...
* kGy (kilogray) One Gy is equivalent to energy of 1 joule absorbed by one
kilogram of food; 1000 Gy = 1 kilogray kGy. 0.0...
Effects on Food Quality
 NUTRITIONAL EFFECTS
Proteins: aromatic amino acids
affected.
Lipids: production of carbonyls ,
o...
 Partial destruction of
Vitamins:
Thiamine,niacin,biotin.
 MUTAGENICITY :
Example: may produce
disease resistant
microor...
It does not inactivate dangerous toxins which
have already been produced by bacteria prior to
irradiation. In some cases,...
Extensive scientific research
reviewed by the World Health
Organization (WHO) and the U.S.
Food and Drug Administration ha...
What Foods Have Been Approved for Irradiation?
FDA has approved a variety of foods for
irradiation in the United States in...
Research
Effects of gamma radiation on the
biological, physico-chemical,
nutritional and antioxidant
parameters of chestn...
References
James M.Jay,1996, Modern food
microbiology, Wayne state
university,CBS publishers.pg-290-
307.
J.S.Smith,Pill...
Urbain,W.M,Food
irradiation,1986,Dep.of Food Science
and Human nutrition,Michigan state
university,London,Academic press
...
 Antonio AL, Carocho M, Bento A, Quintana B,
Luisa Botelho M, Ferreira IC,Effects of gamma
radiation on the biological, p...
Radiation, Food and Water, Google Image
Result for
http://www.compafoodministry.org/wp-
content/uploads/2012/07/Food-2.jp...
FDA(Food and Drug Administration)
http://www.fda.gov/Food/ResourcesFor
You/Consumers/ucm261680.html.
http://www.fda.gov/F...
Preservation of Food by Radiation
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Preservation of Food by Radiation

Published on: Mar 4, 2016
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Transcripts - Preservation of Food by Radiation

  • 1. PRESERVATION OF FOOD BY IRRADIATION PRESENTED BY ENA ATHAIDE MSc- 1 BIOCHEMISTRY INSTITUTE OF SCIENCE
  • 2. Food Preservation Meaning Need Causes of food spoilage
  • 3. WHAT IS IRRADIATION PROCESSING Exposing food to gamma rays, x-rays or electrons to improve shelf life and safety. Irradiation breaks chemical bonds killing microorganisms, insects. Key advantage: no heat generated
  • 4. RADIATIONS USED IN PRESERVATION Ultraviolet(UV light) Beta Rays Gamma Rays X- Rays Microwaves
  • 5. Application of Radiation Most widely used techniques of irradiating food are gamma radiation from CO60 and Cs 137 Electron beams from linear accelerators
  • 6. RADIATION TREATMENT OF FOOD Radappertization : used in canning industry , 30-40 kGy. Radicidation:equivalent to pasteurization of milk,2.5-10kGy. Radurization:equivalent to pasteurization,0.75-2.5kGy.
  • 7. * kGy (kilogray) One Gy is equivalent to energy of 1 joule absorbed by one kilogram of food; 1000 Gy = 1 kilogray kGy. 0.005 kGy dose is sufficient to kill humans. (Another unit of absorbed radiation dose is the rad. One Gy = 100 rad.)
  • 8. Effects on Food Quality  NUTRITIONAL EFFECTS Proteins: aromatic amino acids affected. Lipids: production of carbonyls , organoleptic effect : rancidity. Degradation of structural polysaccharides : pectin and cellulose.
  • 9.  Partial destruction of Vitamins: Thiamine,niacin,biotin.  MUTAGENICITY : Example: may produce disease resistant microorganisms.
  • 10. It does not inactivate dangerous toxins which have already been produced by bacteria prior to irradiation. In some cases, such as C. botulism, it is the toxin produced by the bacteria, rather than the bacteria itself, which poses the health hazard.  It does not prevent the aging of the fruit and vegetables that can lower their nutritional value, taste and flavors.  Irradiation also unavoidably kills off bacteria that produce the smells that warn you when food is going "bad."
  • 11. Extensive scientific research reviewed by the World Health Organization (WHO) and the U.S. Food and Drug Administration has indicated that irradiated food is safe to eat (WHO, 1994; U.S. Department of Health and Human Services, 1997).
  • 12. What Foods Have Been Approved for Irradiation? FDA has approved a variety of foods for irradiation in the United States including: Beef and Pork Poultry Shellfish(e.g., oysters, clams, mussels, and scallops) Shell Eggs Fresh Fruits and Vegetables Lettuce and Spinach Spices and Seasonings
  • 13. Research Effects of gamma radiation on the biological, physico-chemical, nutritional and antioxidant parameters of chestnuts. Control of Listeria monocytogenes on frankfurters and cooked pork chops by irradiation combined with modified atmosphere packaging.
  • 14. References James M.Jay,1996, Modern food microbiology, Wayne state university,CBS publishers.pg-290- 307. J.S.Smith,Pillai,Irradiation and food safety, Food Technol,Vol.58,no.11,pg-48- 55,Nov 2004.
  • 15. Urbain,W.M,Food irradiation,1986,Dep.of Food Science and Human nutrition,Michigan state university,London,Academic press Inc.pg:118-123 Issues in Food safety,United States dept of agriculture, economic research service, agriculture information, Bulletin No.757/Aug 2000
  • 16.  Antonio AL, Carocho M, Bento A, Quintana B, Luisa Botelho M, Ferreira IC,Effects of gamma radiation on the biological, physico-chemical, nutritional and antioxidant parameters of chestnuts, Food Chem Toxicol. 2012 Sep;50(9):3234-42. Epub 2012 Jun 23.,pubmed.  Kudra LL, Sebranek JG, Dickson JS, Larson EM, Mendonca AF, Prusa KJ, Cordray JC, Jackson-Davis A, Lu Z. Control of Listeria monocytogenes on frankfurters and cooked pork chops by irradiation combined with modified atmosphere packaging. J Food Prot. 2012 Jun;75(6):1063-70.pubmed.
  • 17. Radiation, Food and Water, Google Image Result for http://www.compafoodministry.org/wp- content/uploads/2012/07/Food-2.jpg. U.S Environmental Protection Agency, Food Irradiation, http://www.epa.gov/radtown/food- irradiation.html Electron accelerator image:http://ccr.ucdavis.edu/irr/how_food_ irr.
  • 18. FDA(Food and Drug Administration) http://www.fda.gov/Food/ResourcesFor You/Consumers/ucm261680.html. http://www.fda.gov/Food/ResourcesFor You/Consumers/ucm261680.html.