United States or Myanmar ? Vote for the TOP Country of the Week !
If we double each dimension of our amoeba, we shall increase its surface four times, its mass eight-fold. Now the power of absorbing oxygen and excreting waste is evidently proportional to the excretory and respiratory surface, and much the same is true of digestion.
I might add, in fact, that the air bladders of fish contain more nitrogen than oxygen when these animals are caught at the surface of the water, and conversely, more oxygen than nitrogen when they're pulled up from the lower depths. Which bears out your formulation. But let's continue our observations." My eyes flew back to the pressure gauge. The instrument indicated a depth of 6,000 meters.
By this arrangement the air within the alveoli is brought very near a large surface of blood, and the exchange of gases between the air and the blood is made possible. It is at the alveoli that the oxygen passes from the air into the blood, and the carbon dioxide passes from the blood into the air. At no place in the lungs, however, do the air and the blood come in direct contact.
The explosives, gunpowder, begriming the nations in all the wars since 1350, nitroglycerine, oxygen and hydrogen in all the forms of their combination, seem to be gross and material, the natural, though ferocious, servants of mankind.
If shooting starts, get underwater again. We'll have guns, but you'll have only single-shot spear guns." "Good luck," the boys said in unison. They put on the masks and turned the valves that started the oxygen cycles. Rick grinned at Scotty through the glass, and knew that his grin was strained. Scotty grinned back and held up his hand with thumb and forefinger making the signal for "Okay."
He then prepared some pure oxygen and nitrogen gases, and passed them by means of a tube going from the outside of the vessel, up through the mercury into the infusion; so that he thus had it exposed to a perfectly pure atmosphere of the same constituents as the external air.
He drew a long breath to relieve it to calm it with cool oxygen, and then he cocked the five chambered pistol and waited as full of the joy of killing as if the man who was now walking down the path was a wolf or a mad dog down the path and right into the muzzle of the pistol, backed by the arm which could kill.
A normal solution of an oxidizing agent should, therefore, contain that amount per liter which is equivalent in oxidizing power to 8 grams of oxygen; a normal reducing solution must be equivalent in reducing power to 1 gram of hydrogen. In order to determine what the amount per liter will be it is necessary to know how the reagents enter into reaction.
It is this oxygen that produces revival in the cells of the ferment and enables them to resume the faculty of germinating and continuing their life, and of multiplying when deprived of air. In our opinion, a simple reflection should have guarded Dr. Brefeld against the interpretation which he has attached to his observations.
"The oxygen!" he cried, and, suddenly stooping down and examining the tap of the air apparatus, he saw that it had been only half turned off. Consequently the air was gradually getting more and more impregnated with this powerful gas, colorless, odorless, tasteless, infinitely precious, but, unless when strongly diluted with nitrogen, capable of producing fatal disorders in the human system.
Word Of The Day