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・ Isocenter
・ Isocentric technique
・ Isocentris
・ Isocentris charopalis
・ Isocentris filalis
・ Isocentris minimalis
・ Isocentris rubralis
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・ Isoceras
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・ Isoceras bipunctatum
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・ Isoceras kruegeri
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Isocetane
・ Isoceteth-20
・ Isochaetes
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・ Isochaetina
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・ Isochlora
・ Isochoic wave
・ Isochore
・ Isochore (genetics)
・ Isochoric


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Isocetane : ウィキペディア英語版
Isocetane

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Isocetane (2,2,4,4,6,8,8-heptamethylnonane) is a highly branched alkane used as a reference in determining the cetane number of diesel.〔(New system offers faster, easier method for cetane measurement ) by Bill Siuru, ''Diesel Progress, North American Edition'', March, 2002〕 It is given a cetane number of 15. Isocetane replaced 1-methylnaphthalene as the lower reference for cetane number (1-methylnaphthalene has cetane number zero) owing to the expense of 1-methylnaphthalene, and difficulty in safe handling.〔(Cetane number )〕
Strictly speaking, if the standard meaning of ‘iso’ is followed, the name ''isocetane'' should be reserved for the isomer 2-Methylpentadecane. However, 2,2,4,4,6,8,8-heptamethylnonane is by far the most important isomer of cetane and so, historically, it has ended up with this name.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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