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Re: Uniformity Count in Shrimp
Sorry for the delay in sending my comments to
your inquiry , but here they are:
In order to determine "Shrimp Uniformity"
you must:
1.- Thaw and drain all water from
shrimp.
2.- Weigh and count all shrimp in the pack (in
order to verify Net Weight and "Probable Count". This would
give you a preliminary idea of the shrimp size. For example, if you're
counting 16/20's in a 5Lb-Block Frozen Pack, there should be between
80 or 100 shrimp in the inner. An 80-count means the shrimp are pretty
large 16/20's, while a 100-count would suggest the shrimp are smaller
(yet, within its commercial range). However, if you count more
than 100 shrimp --even though the weight and size seem to be right--
then you must check Uniformity, because you might have ended up with a
"sandwich" pack: "Big Shrimps on the outside and
Smaller shrimps in the inside of the Block".
3.- In that case, spread all shrimp on a table
and pick what visually seem to be the 10 largest shrimp of the pack
(Group 1). Then, select what visually seem to be the 10 smallest of
the pack (Group 2).
4.- Weigh Group 1 and Group 2.
5.- Divide Group 1's weight between Group 2's
weight.
6.- The division's resulting number is the
Uniformity ratio.
In "a perfect world", if the result is
"1", then all shrimp is uniform. However, in a real world, a
1.2 or 1.4 is very acceptable. However, if the result is higher than
1.7 or 2.0, something is wrong with the uniformity.
Hope this helps.
Francisco Herrera-Teran
alep@data.net.mx
At 10:48 am -0800 30/1/02, E. Jerry Oliveras, Laboratory Director
& President wrote:
Can anyone tell me what the term
Uniformity Ratio [large/small] means and
how it is determined for a frozen shrimp in blocks
I understand count per pound and glazing, brokens, etc. but don't
get
uniformity ratio - How does one determine it?
What is Large and what is Small ??
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: Sun Feb 03 2002 - 22:19:17 PST