CONIC SECTIONS
\kənˈɪk sˈɛkʃənz], \kənˈɪk sˈɛkʃənz], \k_ə_n_ˈɪ_k s_ˈɛ_k_ʃ_ə_n_z]\
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The curves formed by the intersection of a cone with a plane. They are of three kinds-Ellipses, Hyperbolas, and Parabolas, according to the direction of the cutting plane. A point traces out a conic section when it moves in such a manner that its distance from a fixed point bears a constant ratio to its perpendicular distance from a fixed line. The fixed point is called the focus, the fixed line the directrix of the conic section.
By Henry Percy Smith
Word of the day
Platidiam
- An inorganic water-soluble platinum complex. After undergoing hydrolysis, it reacts DNA produce both intra interstrand crosslinks. These crosslinks appear to impair replication and transcription of DNA. The cytotoxicity cisplatin correlates with cellular arrest in G2 phase cell cycle.