Product Description PRODUCT: Alkaline
Peptone Water Usages:For selective cultivation of bacteria
especially Vibrio . Principle:Peptone provide carbon and
nitrogen sources; sodium chloride to maintain osmotic equilibrium;
higher pH can suppress the growth of coliform and other bacteria,
it is conducive to the growth of Vibrio
cholerae. Formulation(per liter):Peptone 10gSodium chloride
10gFinal pH 8.5 ± 0.2 How to use:1.Suspend 18g in 1L of
distilled water , stirring heated to boiling to completely
dissolve ,autoclave at 121 for 15 minutes.2.Diluted and treated
samples. Quality
control: ItemThe
name and number of strainGrowthColony Color1Vibrio cholerae
VbOGoodTurbid broth2Escherichia coli ATCC25922Poor-- Storage:
Keep container tightly closed, store in a cool, dry place,
away from bright light. Storage period of
3 years. Specifications:
250g/bottle Packaging
& Shipping Packing material:Packed in plastic bottles
with plastic film wrappedCapacity:, 20 bottle/
carton Our
Services1.Offering Free Sample for Testing .2.R & D team
to provide technical support.3.Provide packaging, labeling OEM
customization. FAQ Q1:Sometimes color of dehydrated
culture media between batches have subtle
differences,would this affect test results?A1:The source and
storage conditions of raw material is different ,so there may be
a slight difference in color, which is a normal
phenomenon. Products from our company have to undergo
a rigorous inspection and sensory biology verification before
sale, to ensure that all the indicators characteristics of the
product is under enterprise standard to the extent permitted, not
affect the test results. Q2:After pouring the liquid medium on
the plate , medium seems hard to clot or coagulation time is
longer, is it some problem with product quality?A2: The reason may
be:The required hydration in the preparation process have not been
done completely .That is to say distilled water is
not boil sufficiently to dissolve agar. Because agar proportion,
easily settle in the bottom of the bottle, if not fully shaken
after high-temperature sterilization, it will lead to uneven upper
agar culture gene content and difficult to set. Q3:Why some
colonies of E. coli chromogenic medium color not shown above, but
also confirmed through biochemical tests for E. coli (false
negative)?A3: E. CHROMOGENIC medium is based on the principle of
specific enzyme of E. coli and design, 94% of E. coli have β-
glucuronidase enzyme, with the chromogenic enzyme substrate medium
role in the formation of blue-green colonies. And about 4% of the
E. coli does not have β- glucuronidase enzymes, including concern
O157: H7 Escherichia coli. Therefore, these E. coli can not be
displayed on the color characteristic of E. coli chromogenic
medium,it is possible of false-negative on the chromogenic medium.
However, the traditional medium of the same can not avoid the
problem of false negatives, such as: no gas or slow ferment lactose
intolerance may also strain 44.5 false negatives in the
conventional medium. For this small part of the E. coli can be
detected using other methods. Company
Information /* March 10, 2023 17:59:20
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