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Light-emitting diodes in
Bio-Industry
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Wei Fang Ruey-Chi
Jao
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Tubular fluorescent lamps (TFL) and high-pressure sodium lamps (HPS) are
the principal artificial light sources used in agriculture applications.
Efficient means to apply light, its uniformity, light quantity and quality were
under investigation worldwide. Recent development of photoelectronics
has enabled the commercialization of super bright light-emitting diodes (LEDs), thus making the possibility of using LEDs in plant production as well as illumination possible. LEDs have many advantages over conventional light sources
including high energy-conversion efficiency, utilizing DC power, compact and
solid, longer life, wavelength specific, light intensity/quality adjustable and
low thermal energy output, thus making it a promising light source for plant
growth in a confined environment such as a plant tissue culture room or growth
chamber. LED is very suitable for applications required specific wavelength. NASA
is the first organization using LEDs in the mission
to Mars. At present, their research has expanded the applications of LEDs to replace LASER in photodynamic therapy for cancer
treatments. In the field of Dermatology, LED is the low intensity light source
used as alternative in photo rejuvenation following LASER and pulse light.
Besides skin treatment, LED can be used in other light therapies for the
treatments of wound healing, joint/tissue inflammation, jaundiced newborns, circadian
rhythm disorders, myocardial infarction, stroke, stress reduction, rhinitis,
herpes and seasonal affective disorder etc. The objective of this study was to
review the means of applying LEDs in bio-industry.
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°ª®Ä²v¤H¤u¥ú·½ªºµo®i¤@ª½¬O¹A·~¥Í²£¤W©Î¬ã¨s¤W«D±`«nªº¤@¶µ½ÒÃD(Bula et al., 1991)¡Cªñ¦~¨Ó¥ú¹q§Þ³Nªº¶i¨B±a°Ê¤F°ª«G«×¬õ¥ú¡Bºñ¥ú¡BÂÅ¥ú»P»·¬õ¥úµo¥ú¤G·¥Åé(Light-Emitting Diode, LED)ªº½Ï¥Í¡CLED¨ã¦³°ª¥ú¹qÂà´«®Ä²v¡B¨Ï¥Îª½¬y¹q¡BÅé¿n¤p¡B°ª@¾_¡B¹Ø©Rªø¡Bªiªø©T©w»P§Cµo¼öµ¥ÀuÂI¡A¬Û¸û©ó¥Ø«e´¶¹M¨Ï¥Îªº¿Ã¥ú¿O©Î°ªÀ£¶u¿O¦Ó¨¥¨ã¦³¥ú¶q(Light Intensity)¥i½Õ¾ã¡B¥ú½è(Light Quality¡A¬õ/ÂÅ¥ú¤ñ¨Ò©Î¬õ/»·¬õ¥ú¤ñ¨Òµ¥)¥i½Õ¾ã¡B§N«ot²ü§C»P¥i´£°ª³æ¦ì±¿n®â°ö¶qµ¥ÀuÂI¡A¦]¦¹¹ï®ð±K©Ê¨}¦n¦³Àô±±ªº¹A·~¥Í²£Àô¹Ò¦p¤ÓªÅ¹A·~¡A´Óª«²Õ´°ö¾i«Ç©Î´Óª«¥Íªø½cµ¥¬O¤@ºØ«D±`¾A¦Xªº¤H¤u¥ú·½(Barata
et al., 1992; Bula
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©£¥»¬ã¥¿¡C2004¡C°ª½÷«×LED¶°³½¿OªºÀ³¥Î¡CO Plus E 26(3)286:294¡C(¤é¤å)
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7.
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-------------------------------------------------------------------------------------------------------
l
l
l Wei Fang
received his Ph.D. in Bio-resource engineering from
l Ruey-Chi Jao received his
Ph.D. in Bio-Industrial Mechatronics Engineering from
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