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"electron optical system"¿¡ ´ëÇÑ °Ë»ö °á°úÀÔ´Ï´Ù. °Ë»ö °á°ú º¸´Â µµÁß¿¡ Tab ۸¦ ´©¸£½Ã¸é °Ë»ö âÀÌ ¼±Åõ˴ϴÙ.
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¿µ¹® reproductive system ÇÑ±Û »ý½Ä±â°èÅë
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  1.³²¼º»ý½Ä°èÅë: ³²¼º»ý½Ä±â´Â Á¤ÀÚ(sperm)¸¦ »ý¼ºÇϴ °íȯ°ú Á¤ÀÚÀÇ ¼º¼÷, ¿î¹Ý, ±×¸®°í »çÁ¤¿¡ °ü¿©Çϴ ºÎ°íȯ, Á¤°ü, À½°æ(penis) µîÀ¸·Î ÀÌ·ç¾îÁ® ÀÖÀ¸¸ç, ºÎ¼Ó±â°üÀ¸·Î ¿ÜºÐºñ»ùÀΠÁ¤³¶(seminal vesicle), Àü¸³»ù(prostate), ¿äµµ¸Á¹°»ù(bulbourethral gland, Cowper¡¯s gland) µîÀ» °®Ãß°í ÀÖ´Ù. °íȯÀº Á¤ÀÚ¸¦ »ý»êÇϴ »ý½Ä»ùÀΠµ¿½Ã¿¡ ³²¼ºÈ£¸£¸ó(testosterone)À» ºÐºñÇϴ ³»ºÐºñ»ùÀÌ´Ù. °íȯ¿¡¼­ ºÐºñµÇ´Â ³²¼ºÈ£¸£¸óÀº Á¤ÀÚ»ý¼º°ú »ý½Ä±âÀÇ ¹ß´Þ ¹× À¯Áö¿¡ ÇʼöÀûÀΠ¿ªÇÒÀ» ÇϹǷΠ³²¼º»ý½Ä±â´ÉÀÇ ¿øÃµÀº °íȯ¿¡ ÀÖ´Ù°í º¼ ¼ö ÀÖ´Ù.
  
  2.¿©¼º»ý½Ä°èÅë: ¿©¼º»ý½Ä±â´Â ³­ÀÚ¸¦ »ý¼ºÇϴ ³­¼Ò¿Í ³­ÀÚ¸¦ ÀÚ±ÃÀ¸·Î ¿î¹ÝÇϴ ³­°ü, ±×¸®°í Àڱðú Áú·Î ÀÌ·ç¾îÁ® ÀÖÀ¸¸ç ¿ÜºÐºñ¼±ÀΠ¹Ù¸£Å縰»ù¸¦ °®Ãß°í ÀÖ´Ù. ³­¼Ò´Â ³­ÀÚ¸¦ »ý¼ºÇϴ »ý½Ä»ùÀΠµ¿½Ã¿¡ ¿©¼ºÈ£¸£¸óÀ» ºÐºñÄÉÇϴ ³»ºÐºñ»ùÀÌ´Ù. ¿ù°æÁÖ±â Àü¹ÝºÎ¿¡ ³­ÀÚ¸¦ »ý¼º½Ã۱âÀ§ÇØ ¼º¼÷µÇ°í Àִ ³­Æ÷¿¡¼­ ºÐºñµÇ´Â ¿¡½ºÆ®·Î°ÕÀº ¿©¼º 2Â÷ ¼ºÂ¡ÀÇ ¹ß´ÞÀ» °üÀåÇÒ »Ó ¾Æ´Ï¶ó Àڱ󻸷À» ÀåÂ÷ ¼öÁ¤µÉ ¼öÁ¤¶õÀÌ Âø»óÇϱ⿡ ¾Ë¸ÂÀº »óÅ·Π¸¸µé¾îÁØ´Ù. ³­ÀÚ°¡ ºÐºñµÇ°í ³²Àº È²Ã¼¿¡¼­ ºÐºñµÇ´Â Çª·Î°Ô½ºÅ×·ÐÀº Àڱ󻸷À» º×µµ·Ï Çϸ頺кñ¾×À» Áõ°¡½Ã۸ç ÀڱñÙÀÇ ¼öÃàÀ» ¹æÇØÇÏ¿© ÀӽŽàÀÓ½ÅÀ» Áö¼Ó½Ã۴ ¿ªÇÒÀ» ÇÑ´Ù.
¿µ¹® digestive system ÇÑ±Û ¼ÒÈ­±â°èÅë
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  ¸ÔÀº À½½ÄÀÇ ºÐÇØ, ¼ÒÈ­, Èí¼ö¿¡ °ü°èµÈ Àå±â¸¦ ÅëÄªÇØ¼­ ºÎ¸£´Â ¸».
¿µ¹® nervous system ÇÑ±Û ½Å°æ°è
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  ¿©·¯ ±â°üµéÀÇ ¼­·Î°£ »óÈ£¿¬°áü°è°¡ ¹Ù·Î ½Å°æ°èÀÌ´Ù. ¿©±â¿¡´Â ÁßÃ߽Űæ°è(central nerve system: CNS)¿Í ¸»ÃʽŰæ°è(peripheral nerve system: PNS)°¡ Àִµ¥, ÁßÃ߽Űæ°è¶õ ³ú¿Í Ã´¼ö¸¦ ¸»ÇÑ´Ù. ±×¸®°í ¸»ÃʽŰæ°è¿¡´Â 12½ÖÀÇ ³ú½Å°æ(cranial nerve: ³ú¿¡¼­ ±â½ÃÇÏ¿© ÁַΠ¾ó±¼ºÎÀ§¿Í ¸ñ ºÎÀ§¿¡ ºÐÆ÷ÇÑ´Ù)°ú 31½ÖÀǠô¼ö½Å°æ(spinal nerve:spinal cord¿¡¼­ °¢±â ¾çÂÊÀ¸·Î ½ÖÀ» ÀÌ·ç¾î ³ª¿À´Âµ¥ ÁַΠ¸ñÀÌÇϺÎÀ§ÀÇ ½Åü °¢ºÎºÐÀ¸·Î ºÐÆ÷ÇϰԠµÈ´Ù)À¸·Î ±¸¼ºµÇ¾î ÀÖ´Ù.
  
  ¶ÇÇÑ ¸»ÃʽŰæ°è´Â 3°¡ÁöÀÇ ½Å°æÁ¶Á÷µé·Î ±¸¼ºµÇ¾î Àִµ¥ ¾Õ¿¡¼­ ¸»ÇÑ ³ú½Å°æ°ú Ã´¼ö½Å°æ¿Ü¿¡ ÀÚÀ²½Å°æ°è°¡ ¿©±â¿¡ ÇØ´çµÈ´Ù. ÀÚÀ²½Å°æ°è´Â ´Ù½Ã ±³°¨½Å°æ°ú ºÎ±³°¨½Å°æÀ¸·Î ³ª´µ¾îÁ® ¼­·Î°£ÀÇ ¿Ã¹Ù¸¥ »óÈ£ÀÛ¿ëÀ¸·Î »ýü ¿©·¯ °¡Áö ÀÛ¿ëÀ» ¼öÇàÇÑ´Ù.
¿µ¹® cardiovascular system ÇÑ±Û ½ÉÀåÇ÷°ü°è
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  ½ÅüÀÇ Ç÷¾×¼øÈ¯À» ´ã´çÇϴ ±â°ü. Áï ½ÉÀå°ú Ç÷°üÀ» ÅëÄªÇØ¼­ À̸£´Â ¸»ÀÌ´Ù.
¿µ¹® autonomic nervous system ÇÑ±Û ÀÚÀ²½Å°æ°è
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  »ç¶÷ÀÇ ÀÇÁö¿Í °ü°è¾øÀÌ, Ä§À» È긮°Å³ª ¼ÒÈ­¿îµ¿ µî°ú °°Àº ½º½º·Î Á¶Á¤ÀÌ µÇ¾î ¿òÁ÷À̴ ½Å°æ°èÀ̸砿©±â¿¡´Â ´ÙÀ½°ú °°Àº µÎ °¡Áö°¡ ÀÖ´Ù.
  
  1.±³°¨½Å°æ°è(sympathetic nervous system)-»ç¶÷ÀÌ À§Çè»óÅ¿¡ À̸£·¶À» °æ¿ì¿¡ ÈïºÐÀÌ µÇ´Â ÀÚÀ²½Å°æ°è. ÁɹڼöÀÇ Áõ°¡, ¼ÒÈ­±â ¿îµ¿ÀÇ °¨¼Ò µîÀÇ ÀÏÀÌ À̰÷À» ÅëÇØ¼­ ÀϾ´Ù. ±³°¨½Å°æÀÌ ÈïºÐµÇ¸é ±³°¨½Å°æÀÇ ¸»´Ü¿¡¼­ epinephrine, norepinephrine µîÀÇ ¹°ÁúÀÌ ºÐºñµÇ°í À̰͵鿡 ÀÇÇØ¼­ ¸»ÃÊÀå±â°¡ º¯È­¸¦ ÀÏÀ¸Å²´Ù. ÇÏÁö¸¸ Àå±â¿¡ µû¶ó¼­ epinephrineÀ̳ª norepinephrineÀÇ ¼ö¿ëü¸¦ °¡Áö°í À־ ¿©·¯ °¡Áö ´Ù¸¥ Àå±âÀÇ ¹ÝÀÀÀ» º¼ ¼ö°¡ ÀÖ´Ù. ¼ö¿ëü´Â ´ÙÀ½°ú °°´Ù.
  
    -¾ËÆÄ¼ö¿ëü(alpha-receptor): ¸»ÃÊÇ÷°üÀÇ ¼öÃà, ±â°üÁöÀÇ ¼öÃà, µ¿°øÀÇ ±ÙÀ°ÀÇ ¼öÃà
  
    -º£Å¸1¼ö¿ëü(beta 1-receptor): ½ÉÀå¿¡ Á¸ÀçÇϴ ¼ö¿ëü, ½ÉÀåÀ» »¡¸® ¶Ù°ÔÇϴ ¿ªÇÒÀ» ÇÑ´Ù.
  
    -º£Å¸2¼ö¿ëü(beta 2-receptor): Ç÷°üÀÇ ÀÌ¿Ï, ±â°üÁöÀÇ ÀÌ¿Ï, Áï °¢ Àå±âµéÀº ±× Àå±â°¡ °¡Áö°í Àִ ±³°¨½Å°æÀÇ ¼ö¿ëü¿¡ µû¶ó ±³°¨½Å°æÀÇ ÈïºÐ(±³°¨½Å°æ ¸»´Ü¿¡¼­ÀÇ epinephrineÀÇ ºÐºñ)¿¡ ´ëÇÑ ¹ÝÀÀÀÌ ´Þ¶óÁø´Ù(¿¹-±³°¨½Å°æÀÌ ÈïºÐ½Ã¿¡ beta 1-¼ö¿ëü¸¦ °¡Áö°í Àִ ½ÉÀåÀº »¡¸® ¶Ù°Ô µÈ´Ù. ±³°¨½Å°æ ÈïºÐ½Ã¿¡ µ¿°øÀÇ ±ÙÀ°ÀÌ ¼öÃàÇØ¼­ µ¿°øÀÇ Å©±â°¡ Ä¿Áø´Ù)
  
  2.ºÎ±³°¨½Å°æ°è(parasympathetic nervous system)-±³°¨½Å°æ°ú ¹Ý´ë·Î ÀÛ¿ëÇÑ´Ù. Áï »ç¶÷ÀÌ Á¹¸®°Å³ª ½¯ °æ¿ì¿¡ ÈïºÐÇÑ´Ù. ºÎ±³°¨½Å°æÀÌ ÈïºÐÇÒ ¶§¿¡´Â ½Å°æÀÇ ¸»´Ü¿¡¼­ ¾Æ¼¼Ä¥Äݸ°ÀÇ ºÐºñ°¡ ÀϾ°í À̰ÍÀ¸·Î ÀÎÇØ¼­ °¢ Àå±âÀÇ º¯È­°¡ ÀϾ´Ù.
´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • electron stain
    ÀüÀÚ¿°»ö
  • emission electron
    ¹æÃâÀüÀÚ
  • free electron
    ÀÚÀ¯ÀüÀÚ
  • noncyclic electron flow
    ºñȸ·ÎÀüÀÚÈ帧
  • odd electron
    ȦÀüÀÚ
  • orbital electron capture
    ±ËµµÀüÀÚÆ÷ȹ
  • scanning electron microscope
    ½ºÄ³´×ÀüÀÚÇö¹Ì°æ, ÁÖ»çÀüÀÚÇö¹Ì°æ
  • valence electron
    ¿øÀÚ°¡ÀüÀÚ
  • Apgar scoring system
    ¾ÆÇÁ°¡Á¡¼öÆò°¡¹ý
  • array system
    ¹è¿­ÀåÄ¡, ¹è¿­Ã¼°è
  • auditory system
    û°¢°èÅë, û°¢°è
  • autonomic nervous system
    ÀÚÀ²½Å°æ°èÅë, ÀÚÀ²½Å°æ°è
  • ABO blood group system
    ABOÇ÷¾×Çüü°è
  • air medical transport system
    Ç×°øÀÇ·á¼ö¼Ûü°è
  • alimentary system
    ¼ÒÈ­°èÅë, ¼ÒÈ­°è
¿¾ ´ëÇÑÀÇÇù ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • electron orbit
    ÀüÀڱ˵µ
  • electron perturbation
    ÀüÀÚ±³¶õ
  • electron ray
    ÀüÀÚ¼±
  • electron shell
    ÀüÀÚ°¢
  • electron stain
    ÀüÀÚ¿°»ö
  • electron staining
    ÀüÀÚ¿°»ö
  • electron structure
    ÀüÀÚ±¸Á¶
  • electron beam symmetry
    ÀüÀÚ¼±´ëĪ
  • emission electron
    ¹æÃâÀüÀÚ
  • free electron
    ÀÚÀ¯ÀüÀÚ
  • odd electron
    ȦÀüÀÚ
  • valence electron
    ¿øÀÚ°¡ÀüÀÚ
  • noncyclic electron flow
    ºñȸ·ÎÀüÀÚÀü´Þ
  • scanning electron microscope
    ½ºÄ³´×ÀüÀÚÇö¹Ì°æ
  • transmission electron microscope
    Åõ°úÀüÀÚÇö¹Ì°æ
¿¾ ´ëÇÑÀÇÇù 2 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • Immune system
    ¸é¿ªÃ¼°è(Øóæ¹ô÷ͧ)
  • International System of Unit
    ±¹Á¦´ÜÀ§°è
  • Jackson-Rees anesthetic circuit system
    Àè½¼-¸® ¸¶ÃëÀåÄ¡
  • Kell blood group system
    ÄÌÇ÷¾×Çü±º
  • Kell system
    ÄÌÇ÷¾×Çü.
  • Kidd blood group system
    ۵åÇ÷¾×Çü±º
  • Lewis blood group system
    ·çÀ̽º Ç÷¾×Çü±º
  • Lutheran blood group system
    ·çÅͶõ Ç÷¾×Çü±º
  • Lymphatic system
    ¸²ÇÁ°è(¡­Í£)
  • Magills anesthetic circuit system
    ¸¶Áú¸¶ÃëÀåÄ¡
  • Mapleson anesthetic circuit system
    ¸ÅÇý¼¸¶Ãëȸ·Î
  • NADPH-dependent oxidase system
    NADPH-ÀÇÁ¸¼º »êÈ­È¿¼Ò°è
  • OS (operating system)
    ¿î¿µÃ¼Á¦
  • P blood group system
    PÇ÷¾×Çü±º
  • PACS (picture archiving and communicating system)
    ÆÑ½º, ¿µ»ó ÀúÀå ¹× Àü¼Û ü°è
¿¾ ´ëÇÑÀÇÇù 3 ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • optical microscope
    (±¤ÇÐ)Çö¹Ì°æ(ÎÃùÊúéÚ° )
  • optical path
    ±¤·Î(ÎÃÖØ).
  • optical portion of retina
    ¸Á¸·½Ã°¢ºÎºÐ
  • optical righting reflex
    ½Ã°¢Á¤À§¹Ý»ç(ãÊÊÆïáêÈÚãÞÒ).
  • optical righting reflex
    ½Ã°¢¼º ¹Ù·ÎÀâ±â¹Ý»ç (ãÊÊÆàõ¡­ÚãÞÒ).
  • optical section
    ±¤ÇÐÀýÆí(ÎÃùÊôîø¸).
  • optical sensitization
    ±¤Çа¨±¤.
  • optical zone
    ±¤ÇкÎ, ±¤Çдë(ÎÃùÊÓá).
  • auger electron
    ¿ÀÁ¦ÀüÀÚ
  • electron
    ÀüÀÚ
  • electron
    ÀüÀÚ(ï³í­)
  • electron affinity
    ÀüÀÚģȭ·Â(¡­öÑûúæ³).
  • electron avalanche
    ÀüÀÚ»çÅÂ(¡­ÞÞ÷À).
  • electron beam
    ÀüÀÚ¼±(ï³í­àÊ).
  • electron beam contamination
    ÀüÀÚ¼±¿À¿°
´ëÇÑ»ýÈ­ÇкÐÀÚ»ý¹°ÇÐȸ ¿ë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • electron microscope radioautography
    ÀüÀÚÇö¹Ì°æ ÀÚ°¡¹æ»ç±â·Ï¹ý(ï³í­úéÚ°Ìðí»Ê«Û¯ÞÒÑÀÖâÛö)
  • electron pair bond
    ÀüÀÚ½Ö °áÇÕ(ï³í­äªÌ¿ùê)
  • electron paramagnetic resonance
    ÀüÀÚ»óÀÚ¼º °ø¸í(ï³í­ßÈí¸àõÍìÙ°)
  • electron pressure
    ÀüÀÚ¾Ð(ï³í­äâ)
  • electron probe microanalysis
    ÀüÀÚŽ»çÀÚ ¹Ì·®ºÐ¼®(ï³í­÷®ÞÛí­ Ú°ÕáÝÂà°)
  • electron sink
    ÀüÀÚ(ï³í­) ½ÌÅ©
  • electron spin resonance
    ÀüÀÚ(ï³í­) ½ºÇÉ °ø¸í(ÍìÙ°)
  • electron transfer chain
    ÀüÀÚÀü´Þ(ï³í­îîÓ¹) »ç½½
  • electron transfer flavoprotein
    ÀüÀÚÀü´Þ(ï³í­îîÓ¹) Ç÷¹À̺¸´Ü¹éÁú(Ó±ÛÜòõ)
  • electron transfer potential
    ÀüÀÚÀü´Þ ÀüÀ§(ï³í­îîÓ¹ï³êÈ)
  • electron transfer protein
    ÀüÀÚÀü´Þ ´Ü¹éÁú(ï³í­îîÓ¹Ó±ÛÜòõ)
  • electron transport chain
    ÀüÀÚ¼ö¼Û(ï³í­âÃáê) »ç½½
  • electron transport particle
    ÀüÀÚ¼ö¼Û ÀÔÀÚ(ï³í­âÃáêØ£í­)
  • electron trap
    ÀüÀÚ(ï³í­) µ£
  • hydrated electron
    ¼öÈ­ ÀüÀÚ(â©ûùï³í­)
KI ÀÇÇпë¾î »çÀü °Ë»ö À¯»ç °Ë»ö °á°ú : 7 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
  • portal system
    ¹®¸Æ°è
  • radiologic information system(RIS)
    ¹æ»ç¼±°ú Á¤º¸È­Ã¼°è
  • real time system
    ½Ç½Ã°£Ã¼°è
  • reproductive system
    »ý½Ä±â°èÅë
  • reticuloendothelial system
    ¼¼¸Á³»Çǰè, ¸Á³»°è
  • urinary system
    ºñ´¢±â°è
  • vegetative nervous system
    ÀÚÀ²½Å°æ°è
KMLE ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 3
IOD injured on duty; integrated optical density; interorbital distance
MORD magnetic optical rotatory dispersion
OCR oculocardiac reflex; oculocerebrorenal [syndrome]; optical character recognition
OD Doctor of Optometry; obtained absorbance; occipital dysplasia; occupational dermatitis; occupational...
ODU optical density unit
KMLE ÀÚµ¿ÃßÃâ ÀÇÇоà¾î »çÀü À¯»ç °Ë»ö °á°ú : 5 ÆäÀÌÁö: 3
OM Optical Microscope
OD Optical densities
ODMR Optical detection of triplet-state magnetic resonance
ORD Optical rotatory dispersion
OTF Optical transfer functions
°æºÏ´ë Ä¡°ú´ëÇÐ ±¸°­³»°ú ±³½Ç »çÀü À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
  • ¿µ¹®
    ÇѱÛ
    ¼³¸í
  • high electron density
    °íÀüÀÚ ¹Ðµµ
    ÀüÀÚµéÀÇ ¹Ðµµ°¡ ³ôÀº °÷.
  • immune electron microscopy
    ¸é¿ª ÀüÀÚÇö¹Ì°æ¹ý
  • leukocyte electron microscope
    ¹éÇ÷±¸ ÀüÀÚÇö¹Ì°æ
  • million electron volt
    ¹æ»ç Ä¡¹æ, ÇÙÀÇ ¹Ð¸® ¿¤·ºÆ®·Ð º¼Æ®
  • one electron jump
    ´ÜÀÏ ÀüÀÚ ºñ¾à
  • outer electron
    ¿Ü°¢ ÀüÀÚ
  • recoil electron
    ¹Ýµµ ÀüÀÚ
  • scanning electron micrograph
    ÁÖ»ç ÀüÀÚÇö¹Ì°æ
  • scanning electron microscopy
    ÁÖ»ç ÀüÀÚÇö¹Ì°æ
    ÀüÀÚ¼±ÀÌ Ç¥º»»óÀÇ Á¡¸¶´Ù ÁÖ»çÇÏ¿© À½±Ø¼±°ü
  • transmission electron microscopic
    Åõ°ú ÀüÀÚÇö¹Ì°æÀÇ
  • valence electron
    ¿øÀÚ°¡ ÀüÀÚ
  • ABO blood group system
    ABO Ç÷¾×Çü°è, ABO Ç÷¾×Çü °èÅë
    A, B´Â ¿ì¼º, O´Â ¿­¼ºÀ¸·Î¼­, A, B, AB, OÇüÀÌ ÀÖ´Ù.
  • ABO system
    ABO Çü, ABO °èÅë
  • achromatic system
    ¹«»ö°è
  • aerospace life support system
    ¿ìÁÖ¿ë »ý¸í À¯Áö ½Ã½ºÅÛ
CancerWEB ¿µ¿µ ÀÇÇлçÀü À¯»ç °Ë»ö °á°ú : 15 ÆäÀÌÁö: 3
tubelength optical <microscopy> This distance is measured from the upper focal plane of the objective to the image formed by the objective alone upon removal of the eyepiece. A light microscope so arranged that the specimen, usually a solid-liquid colloid or suspension, is illuminated by a strong pencil of light at right angles to the microscope axis. The visibility is limited by the intensity of the light source. A laser can be used as the source. It is used to detect the presence of light-ultramicroscopic particles within the range of about 0.005,um to 0.2 ~m. Not to be confused with an electron microscope.
(05 Aug 1998)
aperture for electron microscopy <technique> Anode aperture: The opening in the accelerating voltage anode shield of the electron gun through which the electrons must pass to irradiate the specimen. Condenser aperture: An opening in the condenser lens controlling the number of electrons entering the lens and the angular aperture of the electron beam.
The angular aperture can also be controlled by the condenser lens current. Physical objective aperture: A metallic diaphragm, with a small central hole, used to limit the cone of electrons accepted by the objective lens. This improves image-contrast since highly scattered electrons are prevented from arriving at the Gaussian image plane and therefore cannot contribute to background fog. Aplanatic. Free from spherical aberration and coma.
(05 Aug 1998)
Auger electron An electron ejected from a lower energy orbital after a photoelectric interaction of an X-ray photon with a K-shell electron by the characteristic radiation photon; the Auger electron recoils with energy equal to the characteristic radiation less the difference in shell binding energies.
See: photoelectric effect.
(05 Mar 2000)
backscattered electron <microscopy> Produced by an incident electron colliding with the nucleus of an atom in the specimen. The incident electron is then scattered backward about 180 degrees with no appreciable loss of energy, an elastic collision.
(05 Aug 1998)
backscattered electron imaging <microscopy> The production of backscattered electrons from a sample varies directly with the specimen's average atomic number, higher atomic number elements produce more backscattered electrons than lower atomic number ones. Detection of Backscattered Electrons is achieved by using a donut shaped solid state saemiconductor device mounted on the bottom of the objective lens. When Backscattered Electrons strike the detector electron-hole pairs are created which are then counted. This quantity is translated into a pixel intensity and displayed on the CRT, forming the image. By splitting the detector into halves (or quadrants) differences in the signal level on the individual detector segments provide surface topography information.
(05 Aug 1998)
valence electron One of the electron's that take part in chemical reactions of an atom.
(05 Mar 2000)
Parallel Electron Energy Loss Spectroscopy <technique> Electron energy loss spectroscopy analyses the inelastically scattered electrons present in the beam after it has been transmitted through the sample. An electron energy loss spectrum typically consists of a monatomic decreasing background on which are superimposed a number of peaks. Each peak is characteristic of the scattering process that has occurred in the sample. The peaks can be used to obtain information about the chemical composition and electronic structure of the sample. Electron energy loss spectra are acquired typically in a magnetic sector spectrometer located under the camera chamber of the transmission electron microscope. Spatial resolution is typically limited by the minimum probe diameter of the microscope. Electron energy loss spectroscopy tends to be complimentary to EDS in that it can be used to analyse very thin samples of low Z materials.
Acronym: PEELS
(05 Aug 1998)
reverse electron transport <chemistry> The energy-dependent movement of electrons against the thermodynamic gradient to form a strong reductant from a weaker electron donor.
(11 Jan 1998)
microscope, electron <microscopy> An electron-optical device which produces a magnified image of an object. Detail may be revealed by virtue of selective transmission, reflection, or emission of electrons by the object.
(05 Aug 1998)
microscopy, electron Visual and photographic microscopy in which electron beams with wavelengths thousands of times shorter than visible light are used in place of light, thereby allowing much greater magnification.
(12 Dec 1998)
microscopy, electron, scanning Microscopy in which the object is examined directly by an electron beam scanning the specimen point-by-point, giving the surface image a three-dimensional quality.
(12 Dec 1998)
microscopy, electron, scanning transmission A type of electron microscopy which scans with an extremely narrow beam that is transmitted through the sample. The detection apparatus produces an image whose brightness depends on the atomic number of the sample. It should not be confused with microscopy, electron scanning nor with microscopy, electron, transmission (see microscopy, electron).
(12 Dec 1998)
Conventional Transmission Electron Microscopy <technique> A term applied to 'normal' transmission electron microscopy imaging. The electron beam is passed through a thin film sample (typically ~1-200 nm thick). Bright field diffraction contrast images are formed with the direct (undiffracted) beam. Dark field images are formed with a selected diffracted beam. CTEM imaging is used in the general observation of samples and careful selection of the diffracting conditions of the sample will allow the analysis of defect structures within the sample.
(05 Aug 1998)
Convergent Beam Electron Diffraction <microscopy> An electron probe is tightly focused on a transmission electron microscopy specimen and the resulting pattern of diffracted electrons is observed.
The patterns contains information on the crystal symmetry and atomic and electronic structure of the sample. Regions as small as 0.2 nm may be examined.
Acronym: CBED
(05 Aug 1998)
conversion electron An internal conversion electron.
(05 Mar 2000)
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