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Pores

pore

1. One of the minute orifices in an animal or vegetable membrane, for transpiration, absorption, etc.

2. A minute opening or passageway; an interstice between the constituent particles or molecules of a body; as, the pores of stones.

Origin: F, fr. L. Porus, Gr. A passage, a pore. See Fare.


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Transpiration and Photosynthesis.

... through the xylem from the roots. However more significantly for photosynthesis to take place there needs to be gas exchange through the stomatal pores predominantly found on the lower sides of the leaf. If these pores are closed very little water can evapourate (transpire). So if there are low ...

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by Babybel56
Fri Mar 14, 2014 4:07 am
 
Forum: Botany Discussion
Topic: Transpiration and Photosynthesis.
Replies: 4
Views: 2480

PLGA scaffold problem

... in vitro and in vivo effect of this compound. Because it is water solule I could not use salt (particle) leaching method for the production of pores inside the scaffold. I do not have any computarized system so it should be manuel. As additional note this chemical is insoluble in ethanol and ...

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by Yeditepe
Sun Aug 12, 2012 5:03 pm
 
Forum: Cell Biology
Topic: PLGA scaffold problem
Replies: 0
Views: 2192

Molecules entering the bloodstream from skin absorption

... that seems to never be backed up by simple biology and chemistry of the body. It is widely taught in aromatherapy classes and books that the pores on the feet are larger than any other part of your body and that when you put essential oils on the soles of your feet you are able to get to ...

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by watermelonstand
Wed Jul 11, 2012 11:42 pm
 
Forum: Human Biology
Topic: Molecules entering the bloodstream from skin absorption
Replies: 2
Views: 13521

Help on lysis via the complement system

... antigens. Following which, complement proteins attach to the antibodies and produce the membrane attack complex, which causes the formation of pores in the cell membrane of the infected cell, causing it to then lyse. However, I was wondering, isn't this somewhat like necrosis where the cell ...

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by lokifenrir96
Mon Apr 30, 2012 3:00 pm
 
Forum: Human Biology
Topic: Help on lysis via the complement system
Replies: 2
Views: 1971

Cuticle, spores, vascular, plant evolution

... it goes into how plants evolved from living in the freshwater to living on land with the use of: --------------------- the cuticle and cutinized spores: a method of prevention against desiccation and protection for the spores against drying out stomata: initially just pores on the plant to enable ...

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by Klarien
Wed Feb 15, 2012 9:27 am
 
Forum: Botany Discussion
Topic: Cuticle, spores, vascular, plant evolution
Replies: 1
Views: 2400
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