CoPrincipal Investigators Amber Avant Bailey Crosby Morgan Dandridge Megan DeWitt Casey Powell Milk Spoilage the point at which milk becomes unwholesome Milk will have a bad odor ID: 197101
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What Is The Effect Of Microgravity On Milk Spoilage?
Co-Principal Investigators - Amber AvantBailey CrosbyMorgan DandridgeMegan DeWittCasey PowellSlide2
Milk Spoilage - the point at which milk becomes unwholesome. Milk will have a bad odor
& form curdles.Conditions for Milk Spoilage -Air, Moisture, Light, Bacteria, Fat Content, & LactoseSlide3
Milk SpoilageSlide4
Stages of Spoilage
Rancid
– also called “on the turn,” milk is still consumable at this stage.
Curdling
– Separation of curd and whey will occur but may still be consumable.
Coagulation
– beyond use, a period of aromatic decay sets in accompanied by mold
Dry
– beyond use, the milk has dehydrated and become hard and chalky.Slide5
Vol. 1 - 2.5 ml of whole milk
Vol. 2 - 2.5 ml of skim milk
Vol. 3 - 2.5 ml of 1% milk
Refrigerator/Cold Packs
Materials on
Earth & MicrogravitySlide6
Testing Procedures Earth & Microgravity
Each type of milk; whole, skim, and 1% will:be placed in FMEs - same day (2.5ml each volume)be the same brand(Horizon ultra-pasturized
) with same expiration date
be taken out of refrigeration same amount of time (approx. 6 weeks prior to going to space)
Not need necessary interaction while in space
Note:
To keep the milk from getting cross contaminated,
a pipette will be used to put the milk in each volume.Slide7
Hypothesis
Since we already know that there is more fat in whole milk, we believe the whole milk will spoil the fastest, however, we are unsure because the rate of coliforms (bacteria) and lactic acid will vary in microgravity. Slide8
Conclusion
Since
the project has not been tested on Earth, we have no conclusion. The experiment will be tested while the microgravity counterpart is in space.
Our data will be qualitative: We will compare the 2 FMEs and look using a microscope to see which type of milk has the most curdles,
the
most smelly odor, and what the texture is like (the highest stage of spoilage)Slide9
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