Titlebook: Living with Our Sun’s Ultraviolet Rays; Arthur C. Giese Book 1976 Plenum Press, New York 1976 aging.bacteria.blood vessel.bone.cancer.cell

Flexibility

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slipped-disk

978-1-4615-8746-0Plenum Press, New York 1976

大酒杯

sleep-spindles

Initiative

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行乞

ight by which we see. It is, in fact, the source of the energy with which life continues on earth. It furnishes energy for photosynthesis, and the pro- ducts of photosynthesis constitute our food, building materials, and fuel. A steady state of balance and fine interrelationships exists between life

關(guān)心

Sunlight and Life, radio waves have been detected from the sun, but the amount of energy represented is vanishingly small. The maximum intensity of sunlight is in the yellow-green part of the spectrum where our eyes see best, presumably an evolutionary adaptation to the sun’s radiation.

橫截,橫斷

How Ultraviolet Radiation Affects the Cell,. In complex multicellular animals like ourselves, UV-B radiation only penetrates, and is absorbed by, the cells near the surface; cells deep in tissues remain protected. UV-A radiation, however, goes into deeper tissue cells through the outer surface (epidermis) and some of it even penetrates the entire skin layer.

逃避責(zé)任

How Atmospheric Pollution Affects Sunlight and Life,late wastes into the air in even-increasing quantities without a thought. But, just like land and water, the atmosphere is finite. It can absorb only so much waste without losing its protective function.

和諧