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shell shock

The world war I name for what is known today as posttraumatic stress, this is a psychological disorder that develops in some individuals who have had major traumatic experiences (and, for example, have been in a serious accident or through a war). The person is typically numb at first but later has symptoms including depression, excessive irritability, guilt (for having survived while others died), recurrent nightmares, flashbacks to the traumatic scene, and overreactions to sudden noises. Posttraumatic stress became known as such in the 70s due to the adjustment problems of some vietnam veterans.

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Please check my answers.

... A. Logging operations in a forest cut a single population of beetles in two so that they can no longer mix. B. Some snails in a population develop shells that twist to the right instead of the left, which makes mating impossible with partners of opposite shell shape. C. A newly constructed housing ...

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by moondisyko
Fri Apr 04, 2014 9:00 pm
Forum: Evolution
Topic: Please check my answers.
Replies: 1
Views: 4206

Which animal does this tooth belong to?

... move and it could of been carried down from the top, the movement of the glacier has disturbed it and brought it to the surface, any signs of sea shells on the hike? Anyway I am only guessing but that is certainly what it looks like, excellent find though none the less.

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by vk4vfx
Wed Nov 20, 2013 9:28 am
Forum: Zoology Discussion
Topic: Which animal does this tooth belong to?
Replies: 2
Views: 2326

Re: Spectrophotometry - why can't some products be read?

... in bonds (like the UV-induced dimerization of thymidine that can lead to skin cancers). At x-ray energies you can remove electrons from inner shells of atoms. It is the structure of the molecule (and its solvent environment) that determine which energy-absorbing transitions are possible and ...

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by jonmoulton
Thu Nov 01, 2012 4:13 pm
Forum: Molecular Biology
Topic: Spectrophotometry - why can't some products be read?
Replies: 2
Views: 3505


... the fact that without predators the beautiful herbivores we have today would never have evolved. They would all look more like tortoises without shells.

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by animartco
Sun Mar 04, 2012 1:09 pm
Forum: Ecology
Topic: Herbivores without predators
Replies: 19
Views: 19108

Chitosan Extraction

Hello, I am a high school student who is interested in conducting research that will involve the extraction of chitosan from crab shells. I need help with the extraction of chitosan from them. I found some procedures online that were used in past research studies, but they're just an overview. ...

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by kevin81797
Mon Feb 20, 2012 11:59 pm
Forum: Zoology Discussion
Topic: Chitosan Extraction
Replies: 1
Views: 2163
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