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Diameter

Diameter

The length of a straight line passing through the centre of a circle and connecting opposite points on its circumference, hence the distance between two specified opposite points on the periphery of a structure such as the cranium or pelvis.


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Re: Help with indentifying object - can't narrow to even kingdom

... : The true plasmodial slime molds exist in nature as a plasmodium, a multinucleate blob of protoplasm up to several centimeters in diameter, without cell walls and only a cell membrane to keep everything in. This “supercell” (a syncytium) is essentially a large ameba with thousands ...

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by Sadial
Fri Jul 26, 2013 6:29 pm
 
Forum: General Discussion
Topic: Help with indentifying object - can't narrow to even kingdom
Replies: 2
Views: 1770

Re:

... a swarm). 1 cyanobacteria can do that 1 Magnetoglobus -> dead The MMP is a large prokaryotic microorganism that ranges from about 3 to 12 μm in diameter. It is best described as an aggregation of about 10 to 40 Gram-negative, genetically similar cells that swim only as an intact unit and not ...

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by BlahBlahBlah
Thu Jun 27, 2013 1:46 pm
 
Forum: Microbiology
Topic: Multicellular prokaryote
Replies: 24
Views: 17787

How to maintain sterility while preparing petri dishes

... I think the contaminating colonies were nearly identical; they were small, though. Probably the size of...I don't know; probably had half the diameter of a pencil eraser. Yes, whitish. Some of the colonies were rounded while others were not.

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by animus
Thu Jun 27, 2013 12:18 pm
 
Forum: Microbiology
Topic: How to maintain sterility while preparing petri dishes
Replies: 8
Views: 2287

plasmodesm and gap junction

... I found is that plant cell walls are not permeable to big proteins (more than 30-60 kDa), so they must be passed by plasmodesmata (with 20-40 nm diameter). As a result, every plant cell needs plasmodesmata but animal cells haven't any barrier like cell walls for protein transportation. So an ...

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by mnatashgaran
Mon Apr 01, 2013 7:46 pm
 
Forum: Cell Biology
Topic: plasmodesm and gap junction
Replies: 1
Views: 1519

Cottonwood tree twigs with star-shaped pattern

... a botanist please explain to this layman how that tiny star(five pointed) winds up in some twigs from cottonwood trees? When twigs about 1/4" diameter are cut in cross section at a "joint" (where the twig is slightly swollen and growth rings appear to circle the twig's bark), I sometimes ...

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by Thos
Sun Aug 19, 2012 2:54 am
 
Forum: Botany Discussion
Topic: Cottonwood tree twigs with star-shaped pattern
Replies: 0
Views: 1668
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