What is the the effect of Different Types of Milk Containers on the Growth rate of bacteria?

physical at erols.com physical at erols.com
Thu Dec 4 21:45:48 EST 1997


Uncle Al wrote:
> 
> CJ wrote:
> >
> > Well I am a 7th grade student and my science fair project title is "What is
> > the the effect of Different Types of Milk Containers on the Growth rate of
> > bacteria?"  Basically this is the age old question what is better the paper
> > or plastic carton?   I am doing research in the library and my brother told
> > me that newsgroups are quite helpful.  I decided to ask for any hints,
> > tips, ( how would you do the experiment? ), ( good topics to look up )
> > etc...  Please send all responses to missydog at bright.net
> 
> There are glass milk bottles, waxed cardboard, polyethylene film bonded
> to cardboard, and polyethylene jugs.  The bugaboo about plastic jugs was
> that they let in ultraviolet light from fluorescent lamps, which
> progressively destroys Vitamin D.  Then some naughty news station did a
> study on Vitamin D content of milk and found it was all over the map
> because oily Vitamin D and watery (especially the reduced fat
> atrocities) milk are immiscible.  Environmentalists do not lust after
> statistical process control engineering sanctions.  The noise about
> protecting the innocent from the heinous effects of notional, fictive,
> and nugatory UV degradation vanished.
> 
> There are also gamma radiation-sterilized milk packs which are good
> without refrigeration essentially forever or until oxygen permeation
> makes it taste Heart-Smart.
> 
> Oh yeah, back to bugs.  It is clear that different surfaces will please
> and displease different bugs differently, both from a standpoint of
> native surface interaction and from chemical species differentially
> surface adsorbed from the milk.  You would need a standard culture of
> typically spoiled milk, control milk, a selection of surfaces, aseptic
> technique, and a way to quantitatively identify milk spoilage - rate and
> degree.  It would also be nice to quantify the degree of bacterial
> colonization of the different surfaces, the identity of the bugs, and
> the number of bacteria thereupon.
> 
> The USDA (Department of Agriculture) has several milk Web pages.  I
> pulled some excellent statistics for my essay on intergalactic butterfat
> extortion rings (the Earth pays up or they steal our sun).  Also try
> search engines.  There is a searchable clickable resource of about 300
> links in my Web page.
> 
> When push comes to shove, the gallon polyethylene milk jug is a
> fantastic triumph of technology over Luddites.
> 
> --
> Uncle Al Schwartz
> UncleAl0 at ix.netcom.com ("zero" before @)
> http://pw2.netcom.com/~uncleal0/uncleal.htm
> http://www.ultra.net.au/~wisby/uncleal.htm
> http://www.guyy.demon.co.uk/uncleal/uncleal.htm
>  (Toxic URLs! Unsafe for children, Democrats, and most mammals)
> "Quis custodiet ipsos custodes?"  The Net!

	Uncle Al:
	Will you be able to deal with your conscience if it turns out you are
singly responsible for this poor child dropping out of the 7th grade?
	Do you think he had just a little help locating newsgroups?
-- 
  Standing up for children's rights, in the admirable fashion of W.C.
Fields,
---------------------------------------------------------------------
Kristofer Hogg, ms rd  physical at erols.com  http://www.erols.com/physical
           Physical Concepts & HoloBarre Fitness Systems, NY   
Facts--cheap   Synthesis--glorious   Nice bodies--nice, but irrelevant
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