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Problem

problem

1. A question proposed for solution; a matter stated for examination or proof; hence, a matter difficult of solution or settlement; a doubtful case; a question involving doubt.

2. (Science: mathematics) Anything which is required to be done; as, in geometry, to bisect a line, to draw a perpendicular; or, in algebra, to find an unknown quantity.

Problem differs from theorem in this, that a problem is something to be done, as to bisect a triangle, to describe a circle, etc.; a theorem is something to be proved, as that all the angles of a triangle are equal to two right angles.

(Science: geometry) plane problem, a problem requiring in its geometric solution the use of a conic section or higher curve.

Origin: F. Probleme, L. Problema, fr. Gr. Anything thrown forward, a question proposed for solution, fr. To throw or lay before; before, forward _ to throw. Cf. Parable.


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Re: growing bacteria in petri dishes

... after half an hour .... try to maintain it for long as 5hours with a intermediate half an hour gap. I tried it in my lab as we had some Incubator problem during my research and it worked, even though some plates got contaminated. Try it, hope it works... :)

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by greatmicrobiologist
Sun Mar 10, 2013 2:30 pm
 
Forum: Microbiology
Topic: growing bacteria in petri dishes
Replies: 8
Views: 17732

Two-color in situ help

Problem seems to be solved. Not sure which step went wrong but the second signal began to appear when I diluted the second antibody 2X more and used less incubation time for the TSA reaction (about 3 min).

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by vastgenome
Sat Mar 09, 2013 4:21 pm
 
Forum: Molecular Biology
Topic: Two-color in situ help
Replies: 3
Views: 260

Genetic Disorder report help

... I've been having the hardest time trying to start this report. I've googled trying to find a way to start this but found nothing. I think my problem is how vague the report its. The only info I have is literally the title of this post minus "help". I'm not sure how to start or what ...

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by fluffy
Sat Mar 02, 2013 6:59 pm
 
Forum: Genetics
Topic: Genetic Disorder report help
Replies: 1
Views: 58

problem about DNA

Hi everyone ^_^ can u help me to solve this problem? DNA segment consist of 8000 b.p .. C is 30% .. find the number of A, T, C, G.

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by nona119
Sat Mar 02, 2013 9:26 am
 
Forum: Molecular Biology
Topic: problem about DNA
Replies: 1
Views: 87

Protein ladder width increases down the gel?

... proteins when running a SDS-PAGE. I have conjugated several different molecular weight proteins with dyes and ran them on a 12% gel. There is no problem with the size when I loaded each protein into a separate well, but when I combined all of the proteins together into 1 well, the lower molecular ...

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by albert23
Wed Feb 27, 2013 12:55 am
 
Forum: General Discussion
Topic: Protein ladder width increases down the gel?
Replies: 2
Views: 160
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