Word: naturales
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Dates: during 1950-1959
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Natural Synthetic Rubber. U.S. Rubber Co. and Shell Chemical Corp. jointly began commercial production of polyisoprene, a man-made rubber duplicating tree-grown rubber. Intended for duty in large-size tires where ordinary synthetic rubber breaks down, the new rubber also will be used in white sidewall tires, crepe-rubber...
This experiment has led Dr. Bogoch to believe that the isolated brain constituent is chemically either similar or identical to the natural receptor substances in the brain. It therefore attracts the viruses to itself and prevents their damaging the brain.
Perhaps an analogy can be made with so many of those flourishing beards which adorn the freshman class, more resplendent than Schweitzer's but less natural and less the sign of wisdom. The challenge which Levine will ultimately have to face is that very true aphorism of Andre Gide's...
College may not be the proper time for this kind of sympathetic attitude; it is the time for scepticism. But scepticism need not be hostile; nor must selfconscious awareness of subjectivity prevent emotional involvement. Nothing would be more absurd than to strive for an artificial warmth or some sort of...
All live vaccines must be made with viruses that have no power to cause disease. A few occur that way in nature. Most are formerly virulent strains that have been "attenuated" by growing them in animals (or eggs) that are not their natural prey. These must then be tested to...