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Streak

streak

1. A line or long mark of a different colour from the ground; a stripe; a vein. What mean those coloured streaks in heaven? (milton)

2. A strake.

3. (Science: chemical) The fine powder or mark yielded by a mineral when scratched or rubbed against a harder surface, the colour of which is sometimes a distinguishing character.

4. The rung or round of a ladder.

Origin: OE. Streke; akin to D. Streek a line, stroke, G. Strich, AS. Strica, Sw. Strek, Dan. Streg, Goth. Stricks, and E. Strike, stroke. See Strike, Stroke, and cf. Strake.


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Needing help identifying uknowns for micro lab

... I could send but 7A looked kind of purplish and pretty much stayed where I put it, was circular. 7B was white and fanned out all around the streak kind of like clouds, if that makes any sense. I kind of think 7A is salmonella 7B has me stumped!!!

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by avon7774
Wed Jul 29, 2009 10:35 pm
 
Forum: Microbiology
Topic: Needing help identifying uknowns for micro lab
Replies: 1
Views: 101

Re: Unknown Bacteris Identification

Do you have access to a KIA or TSI slant? Streak the stop and stab the slant to the bottom. If you have Proteus, you will have strong H2S production (black color) towards the bottom of the slant. One easy method, although I wouldn't condone it ...

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by gakerty
Wed May 13, 2009 5:12 pm
 
Forum: Microbiology
Topic: Unknown Bacteris Identification
Replies: 4
Views: 769

Problem with Euglena

... being cut apart by the middle, with a transparent line cutting across vertically (imaging a long euglena laying flat, and then a big transparent streak cutting vertically down). I don't know what's going on, but I'm worried as I need to write this up and have no idea about what to say. There ...

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by vinniram
Sat May 31, 2008 1:49 am
 
Forum: Microbiology
Topic: Problem with Euglena
Replies: 1
Views: 1206

growing E coli from a starter culture

I would agree with blcr11: -If you are in a hurry, you can go directly from glycerol to broth. -but if you have enough time streak on a plate and restart from an isolated colony. and ampicillin stinks as a selective antibiotic. Although I suspect you did not have much choice. more stable ...

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by canalon
Tue Apr 22, 2008 1:16 pm
 
Forum: Microbiology
Topic: growing E coli from a starter culture
Replies: 7
Views: 3492

Re: growing E coli from a starter culture

I guess the "proper" way is to gouge out a bit of the culture and streak it onto plates (with the appropriate selective media), grow the plate overnight, and then start a fresh culture from a single colony on the plate. It also depends on whether you're ...

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by blcr11
Tue Apr 22, 2008 12:54 pm
 
Forum: Microbiology
Topic: growing E coli from a starter culture
Replies: 7
Views: 3492
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