CS Center
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¼ö»ê±â(OH) | |
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ÀÛ¼ºÀÚ : °ü¸®ÀÚ(ks@biozonekorea.com) ÀÛ¼ºÀÏ : 2006.05.10 Á¶È¸¼ö : 3937 | |
Hydroxyl Radical(¼ö»ê±â) The hydroxyl radical"OH" is the neutral form of the hydroxide ion. ÇÏÀ̵å·Ï½Ç ·¡µðÄÃÀº OH·Î¼ ÇÏÀ̵å·Ï»çÀ̵å ÀÌ¿ÂÀÇ Áß¼º »óŸ¦ ¸»ÇÕ´Ï´Ù. Hydroxyl radicals are highly reactive and consequently short lived, however they form an important part of radical chemistry. ÇÏÀ̵å·Ï½Ç ·¡µðÄÃÀº ³ô°Ô ¹ÝÀÀÇÏ°í µû¶ó¼ ¼ö¸íÀÌ Âª½À´Ï´Ù. ±×¸®°í ÀÌ°ÍÀº ·¡µðÄà ÈÇп¡¼ Áß¿äÇÑ ºÎºÐÀÔ´Ï´Ù. Most notably hydroxyl radicals are produced from the decomposition of hydro-peroxides (ROOH) or, importantly in atmospheric chemistry, by the reaction of excited atomic oxygen with water. °¡Àå ÁÖ¸ñÇÒ ¸¸ÇÑ ¼ö»ê±â(OH)´Â ÇÏÀ̵å·Î ÆÛ·Ï»çÀ̵å(¾ËÄÚ¿Ã)³ª ¶ÇÇÑ ´ë±â ÈÇп¡¼ Áß¿äÇÑ ¼öºÐ(¹° ºÐÀÚ)°ú ÇÔ²² »ê¼Ò ¿øÀÚ¿Í µé¶á ¹ÝÀÀ¿¡ ÀÇÇØ ºÐÇصǴ °úÁ¤¿¡¼ ¸¸µé¾î Áý´Ï´Ù. In the troposphere the hydroxyl radical acts like a detergent, reacting with carbon monoxide, methane and other hydrocarbons and so oxidizing them to form water and carbon dioxide. ´ë·ù±Ç¿¡¼ ÇÏÀ̵å·Ï½Ç ·¡µðÄà ¿ªÈ°Àº ÀÏ»êÈź¼Ò, ¸Þź°ú ¶Ç´Ù¸¥ źȼö¼Ò ±×¸®°í ¹° ºÐÀÚÀÇ »óÅ·Π»êȽÃÄÑ Ã»¼Ò¸¦ ÇØÁÖ´Â ¼¼Ã´Á¦¿Í À¯»çÇÕ´Ï´Ù. The very short in vivo half-life of approx. 10-9 s and its high reactivity renders it a very dangerous compound to the organism. ÀÌ ¼ö»ê±â ·¡µðÄÃÀº ´ë·« 1¾ïºÐÀÇ 1ÃÊ ¶ó´Â ¸Å¿ì ªÀº ¹Ý°¨±â¸¦ °¡Áö°í ÀÖÀ¸¸ç ÀÎü¿¡ ¸Å¿ì À§ÇèÇÑ À¯±âÈÇÕ¹°¿¡ ³ôÀº ¹ÝÀÀ¼ºÀ» ³ªÅ¸³À´Ï´Ù. Unlike superoxide which can be detoxified by superoxide dismutase it cannot be eliminated by an enzymatic reaction as this would require its diffusion to the enzyme"s active site. ½´ÆÛ¿Á»çÀ̵å¿Í´Â ´Þ¸® ¼ö»ê±â´Â ½´ÆÛ¿Á»çÀ̵忡 ´ëÇÑ Ç×»êÈÁ¦·Î¼ Çص¶ ÀÛ¿ëÀ» ÇÒ ¼ö ÀÖÀ¸¸ç ÀÌ°ÍÀº È¿¼Ò¿¡¼ ó·³ ¹ÝÀÀ¿¡ ÀÇÇؼ Á¦°ÅµÉ ¼ö´Â ¾øÁö¸¸ È¿¼ÒÀÇ È°µ¿ ¿µ¿ª¿¡¼ È®»êÀ» ¿ä±¸ÇÒ °ÍÀÔ´Ï´Ù. As diffusion is slower than the half life of the molecule it will react with any oxidizable compound in vicinity. È®»êÀº ºÐÀÚÀÇ ¹Ý°¨±âº¸´Ù ´õ¿í ´õ ´À¸®°Ô ³ªÅ¸³ª¸ç ±× ÁÖÀ§¿¡ ÀÖ´Â »êÈÇÒ ¼ö ÀÖ´Â ¾î¶² ÈÇÕ¹°°úµµ ¹ÝÀÀÇÒ °ÍÀÔ´Ï´Ù. The only means to protect important cellular structures is the use of antioxidants such as glutathione and of effective repair systems. ÀÌ Àǹ̴ ±Û·çŸġ¿Â(Ç×»êÈÁ¦)°ú °°Àº ±×·¯ÇÑ »êȹæÁöÁ¦(³ëÈ ¹æÁöÁ¦)·Î »ç¿ëµÇ¾î ±Û·çŸġ¿Â(Ç×»êÈÁ¦ÀÇ ÀÏÁ¾)°ú °°ÀÌ ¼¼Æ÷¸¦ Àç»ýÇÏ´Â È¿°ú·Î Áß¿äÇÑ ¼¼Æ÷ ±¸Á¶¸¦ º¸È£ÇÏ´Â °ÍÀÔ´Ï´Ù. |
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