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    Histopathology - Wikipedia, the free encyclopedia
  • ... λογία -logia) refers to the microscopic examination of tissue in order to study ... The microtome slices the tissue ready for microscopic examination. ...
  • http://en.wikipedia.org/wiki/Histopathology
Questions/Answers
What is preventing microscopicblack holes from causing aperson to implode?
The theroy I've heard is black holes are more common and some can be microscopic. If that is true, what prevents them from collapsing a person? I'm not trying to be dumb, I just don't understand how this can be.
Mr. Zwick is close, but its not an infinite amount of matter. Any amount of matter, when packed together tightly enough will produce a black hole. Density=Mass/Volume As volume approaches zero, the density approaches infinity - no matter how much mass is present. Density determines whether there is an event horizon and a singularity - ie - is it a black hole However, the gravitational force of a black hole (or any body) is a function of its mass alone. The lifespan (see below) and strength of the gravity field is determined by overall mass. Thus, you can have a mass at infinite density without it having sufficient gravity to pull much at all in. True, if given enough time, the blackhole will continue to consume and thus will eventually grow big, increase its gravitational field and be able to stretch its reach further. However, black holes don't live forever. So here's the answer to your question as the best models explain it so far - according to Stephen Hawkings, black holes evaporate through a process called Hawkings Radiation. This is sort of like a black hole evaporating through quantum parity interactions. With a microscopic black hole, the evaporation happens faster than its gravity is strong so its loosing mass faster than its gaining new mass. Its gravity isn't strong enough to overcome the other forces acting on its potential victims. Atoms produce their own gravity field for instance, but since they are so small, the electro magnetic force at that scale is far more powerful. Likewise, inside the nucleus, you'd think the electro magnetic force between the protons would cause them to repel. They would, at larger scales, but when you get that small, the strong nuclear force is more powerful. Gravity is the weakest of all the forces (assuming Einstein is wrong and that gravity IS a force afterall). Gravity is weaker than the electromagnetic force - that's why you don't fall through the sidewalk but rather walk on top of it. Electromagnetism is weaker than the weak nuclear force - that's why atomic the atomic nucleus can break down and give off alpha and beta particles. The weak nuclear force is weaker than the strong nuclear force - that's why the nucleus stays intact rather than the neutrons all decaying. The larger you get, the less impact a force has - gravity is weak, but acts over long distances, the strong is strong but acts over short distances.
What is the microscopicexamination comparing thefollowing bacteria?
What is the difference between the bacteria's Enterococcus faecalis and Staphylococcus aureus with microscopic examinations?
E. faecalis will form linear chains of cells in a line (a "strept" arrangement). S. aureus will form clusters of cells like grapes (a "staph" arrangement). Other than that , they look very similar. Both are spherical (cocci) and both stain Gram +.
What are the littlemicroscopic worm like thingsswimming in my fish's water?
There appear to be tiny microscopic worm-like things just wriggling around the water, and they are freaking me out a little. What are these things and how did they get in there? Ok, so aside from the totally ridiculous answers, the little things are JUST visible to the naked eye... I recently fed me fish Mosquito Larvae that were freeze dried- is it possible some were alive?
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these things are not mosquito larva, they are Planaria, a parasite that develops from over feeding. its harmless and your fish are in no danger. but it shows that you have to change something. i had them too and i freaked out. after some internet research i did the following: change all the water boil all the gravel for 10 min or more wash all the plants and ornaments with hot water (don't use any detergents, not good for the fish!) ad aquarium salt, its good for the fish and helps prevent diseases and parasites. and finally change the way you feed. i have a pair of tweezers and feed every one of my fish just as much as i want them to eat. one flake at a time. and anything that floats down uneaten i get out with my fish net thing. i know it sounds like more work but think about it, uneaten food is basically going to rot and with that come the problems... good luck and remember, they're not harm full! ps, 'confused' is right, it is very drastic and you might want to find another way to get rid of them. i had a 5 gallon tank with a betta in it, so it wasn't a big deal to put her in another bowl and clean everything. i probably wouldn't do it with my 30 gallon aquarium.
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