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Normally this organic nitrogen is transformed in the soil, first into ammonia nitrogen, next into nitrite nitrogen, and lastly into nitrate nitrogen, these three transformations being effected by biochemical action produced by different kinds of living microscopic organisms called bacteria.
There are no doubt objections to accepting laboratory experiments upon inferior animals as conclusive where the psychic part of the process in question is after all the dominant one, nor must we forget that biochemical changes may be as important as the integrity of nerves.
Are mental activity, energy transformation, and transformation of matter three aspects of the same biochemical phenomenon?
Being always a homoplastic transfer, the new blood is not always tolerated by the old, in which case biochemical changes occur, resulting in hæmolysis, which corresponds to the disintegration of other unsuccessful homoplastic grafts.
It was an old question, a favorite on freshman medical school examinations. "The principle that environments and life forms in the universe may be dissimilar, but that biochemical reactions are universal throughout creation," Dal said slowly. "Well memorized," Black Doctor Tanner said sourly. "What does it mean?"
Such a thing was surely not a physical or biochemical impossibility in the light of a newer science which includes the theories of relativity and intra-atomic action.
One group claimed to have virtually duplicated the plasmoid loaned to it by the Federation, producing a biochemical structure distinguishable from the Old Galactic model only by the fact that it had quite predictably fallen apart within hours. But plasmoids didn't fall apart. The specimens undergoing study had shown no signs of deterioration.
You have undertaken a biochemical and medical survey for which you had neither the proper equipment nor the training qualifications, and you exposed your ship and your crewmates to an incredible risk in landing on such a planet. You are responsible for untold possibly fatal damage to over two hundred individuals of the race that called on you for help.
It was decided that Jack and Tiger would visit the planet's surface at once, while Dal stayed on the ship and set up the reagents and examining techniques that would be needed to measure the basic physical and biochemical characteristics of the Bruckians.
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