Dictionary » S » Streak

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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Humans are Deuterostomes. Right?..

... becomes the mouth. But the thing is that, as I have found out, there is no archenteron in human embryo at all. In fact, there are primitive node/streak/groove. Besides, that primitive groove is somehow connected to the yolk-sac by means of blastopore (again, wiki says). So how did blastopore ...

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by Siroggak
Tue Aug 12, 2014 4:46 pm
 
Forum: Human Biology
Topic: Humans are Deuterostomes. Right?..
Replies: 0
Views: 188

URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!

... Blue Vegetative cells. SPORE REACTION (-) ACID FAST STAINING (-) NUTRIENT BROTH CULTURE- Quite turbid, slightly cloudy, no skin NUTRIENT AGAR STREAK- Shape – Cocci, Yellow, 0.2-0.5m Glossy NUTRIENT AGAR STAB: Aerobic GELATIN STAB: No Proteolysis THIOGLYCOLLATE MEDIUM- Anaerobic SEMI SOLID ...

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by microbiologyhelp
Wed Nov 20, 2013 6:09 pm
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5655

Is there an insect that behaves this way?

... barn, there have been these green lights flitting around. Maybe flitting isn't the right word. It is more of a very straight, fast moving green streak. The color is pretty much the same as a lightning bug but this doesn't seem to behave like any lightning bug I've ever seen. Lightning bugs are ...

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by sushiboy
Sun Jul 29, 2012 10:07 pm
 
Forum: General Discussion
Topic: Is there an insect that behaves this way?
Replies: 6
Views: 3448

can old culture of s. aureus not ferment mannitol

Is it possible for an old culture of s. Aureus to not be able to ferment mannitol (on an MSA plate) efficiently? The first time that I streak my unknown on an MSA plate, there was growth and fermentation of mannitol. Through other biochemical test, I was able to narrow it down to S. Aureus. ...

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by thuydeebird
Sat Apr 21, 2012 6:22 pm
 
Forum: Microbiology
Topic: can old culture of s. aureus not ferment mannitol
Replies: 0
Views: 765

Re: NEED HELP WITH MY UNKNOWN GRAM POSITIVE ORGANISM PLEASE??

... salt agar = no colony growth in media whatsoever and the medium stays pink. 4) catalase negative. 5) coagulase negative. I suggest that you re-streak a new mannitol salt agar plate because i think that based on your gram stain and catalase result then you might be dealing with a staphylococcus ...

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by mariah000
Sun Mar 18, 2012 7:50 pm
 
Forum: Microbiology
Topic: NEED HELP WITH MY UNKNOWN GRAM POSITIVE ORGANISM PLEASE??
Replies: 1
Views: 17140
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