D라이브러리

large quantities of rocky grit. The cloud is therefore composed of steam and dust. This reflects much of the sun's light and shades the comet, which thus manages to move past and begin its retreat still largely intact.Still, the comet is badly affected by the approach. Some really sizable comets that approach the sun fairly closely send out clouds of steam and dust that are pushed outward, ...

이 단백질 복합체는 다시 생체막과 결합하고 있는 것이다.광합성 반응과정은 명반응(Light reaction)과 암반응(Dark reaction)단계로 나눌 수 있다. 명반응 단계에서는 광수용체 분자들이 광선을 흡수하고 전자를 방출하게 된다. 이때 전자는 전자운반체들에 의해 수송되어 NADPH라는 강한 환원력을 가진 ...

exists, there are other planets also circling the star that can't be detected simply because they are too small and light to force a detectable wobble on the star.In other words, with these reports, astronomers are bound to be a little readier to believe that there are numerous Earth-like planets in the galaxy (and in other galaxies as well.) This is important, because the more Earth-like ...

areas toward us.Then, too, the planet Saturn has a satellite named Iapetus that shows an even greater variation in light intensity than Nereid does. Iapetus has been seen at reasonably close quarters and it turns out that half of its surface is coated with ice and the other half with some dark substance.However, astronomers have not yet worked out haw Iapetus became a two-tonde satellite. Is ...

쓰이고부터이다. 산업용으로 본격적인 연구를 시작한 것은 일본. 1973년 '문 라이트'(Moon Light) 프로젝트 혹은 '선샤인'(Sun Shine) 프로젝트 등으로 원적외선에 대해 학술적인 접근과 아울러 어떻게 산업적으로 활용할 수 있을까를 연구했다.여기에 일대 전환점을 마련했던 주인공은 '나고야' ...

the stability, to be sure, but in the early 20th Century it was found that atoms consist of tiny nuclei surrounded by light electrons. It is the electrons that interact with each other to form bonds between atoms. In 1932, Linus Pauling showed that, in the case of molecules like benzene, the electrons' interaction produces a very stable situation.But though every chemical fact discovered about ...

of traces of boron or phosphorus. Such semiconductors would be resistant to radiation, transparent to ultraviolet light, and its electrons would move about much faster than those of other semiconductors. It is possible that by proper diamondizing, enormous advances can be made in computer technology.More surprising still is the word coming out of the Soviet Union (which still leads the world ...

to it?In ancient times, it was apparent that the sun and moon had an important influence on Earth. The sun supplied light and warmth by day and controlled the seasons, while the moon dimly lit the night, the phases of the moon supplied humanity with its first calendar.The sun and moon changed position relative to the stars, and the ancient Babylonians found that five bright stars(the planets ...

숫컷이 내는 섬광유형에 따라서 반딧불의 종류를 구별할 수 있다. 또한 펜라이트(Pen light)로 비행중이 숫컷이 발(發)하는 섬광유형을 흉내내면 그에 반응하는 암컷의 회신섬광을 알아낼 수 있다. 그리고 펜라이트로 숫컷에서 회신섬광을 보냄으로써 숫컷을 유인할 수 있다. 또한 반딧불을 잡아먹는 ...