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Colonies

Colony

(Science: biology) a group of identical cells (clones) derived from a single parent cell.

(Science: cell culture) a clone of bacterial cells on a solid medium that is visible to the naked eye.


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my unknown

... and others will be coagulase (-). You may have access to TGA (Tellurite-Glycine Agar) plates, which differentiate coagulase + (black pigmented colonies) and coagulase - (grayish, or white)although it's certainly not perfect. By "whitish" in pigment, I'm assuming you have already tested ...

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by gakerty
Wed May 13, 2009 5:22 pm
 
Forum: Microbiology
Topic: my unknown
Replies: 2
Views: 94

Identifying unknown

I need to identify an unknown from the environment, but am having trouble finding somewhere to start. I have quite a bit of information. Colonies are cream colored. It is gram positive. It grew at high concentrations of sodium chloride (.5%,2%,%5,20%). It grew at 4 degree celsius and 25 degree ...

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by mccullyj
Fri Apr 24, 2009 10:22 pm
 
Forum: Microbiology
Topic: Identifying unknown
Replies: 1
Views: 260

Natural selection is proven wrong

... and calcimicrobes.[3] Before about 580 million years ago, most organisms were simple, composed of individual cells occasionally organized into colonies. Over the following 70 or 80 million years the rate of evolution accelerated by an order of magnitude (as defined in terms of the extinction ...

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by gamila
Wed Apr 22, 2009 12:31 pm
 
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 82
Views: 2304

Horse blood agar

Beta haemolysis is a clear area around the colonies. Alpha haemolysis is a greenish area around the colonies. There's also so called gamma, which is technically no haemolysis.

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by Sepals
Mon Apr 20, 2009 8:57 am
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 7
Views: 417

Horse blood agar

you should see a halo around the colonies, see an exemple on that page (scroll down to the differences between alpha, beta and gamma hemolysis): http://www.answers.com/topic/hemolysis

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by canalon
Sat Apr 18, 2009 2:24 am
 
Forum: Microbiology
Topic: Horse blood agar
Replies: 7
Views: 417
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