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d라이브러리

"calcium"(으)로 총 3건 검색되었습니다.

바다탐험과학동아 l199706

of these tiny animals growing together as a colony. These tiny coral polyps** are the builders of the reef. Their tiny calcium shells have accumulated over thousands of years to form the larges ...

우주적 위험과학동아 l199005

have stayed in space for as long as a year, and have suffered considerable physiological changes (their bones lose calcium and muscles lose tone) from living in zero-gravity conditions.But what ...

화성을 다시 찾다과학동아 l199002

In it, small amounts of two different kinds of carbon-containing compounds were formed. One consisted of bits of calcium carbonate, ordinary limestone. The other, however, consists of organic ...