• 제목/요약/키워드: Red light

검색결과 1,986건 처리시간 0.028초

맥아제조시(麥芽製造時) 적색광(赤色光) 희사(熙射)에 의한 배유조직(胚乳組織)의 변화(變化) (Effect of Red Light on Changes of Embryo Tissue of Barley during Germination)

  • 김진구;신승렬;김주남;김순동;김광수
    • Applied Biological Chemistry
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    • 제30권1호
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    • pp.60-64
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    • 1987
  • 보리의 발아중 호분층 및 배유조직에 미치는 적 색광의 영향을 조사하였다. 발아일수가 경과함에 따라 적색광 조사에 의한 배유조직의 친분입자의 용해현상이 발아 3일까지는 암소와 큰 차이가 없었으나 4일부터는 현저히 촉진되었다. 맥아내 전분의 blue value는 암소에서 발아 1일에 0.42, 6일에 0.13으로 발아일수가 경과함에 따라 현저히 감소하였으며, 적색광 처리에서도 동일한 경향을 보였으나 암소보다 그 값이 낮았다. 호분층 세포벽의 팽윤 및 붕괴현상은 발아일수가 경과함에 따라 촉진되었는데 암소에 비하여 적색광 조사에서 현저하였으며 특히 적색광 조사시의 발아일에서 세포벽의 붕괴현상이 심하였다.

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적색 발광다이오드(Light Emitting Diode)를 이용한 클로렐라 배양에 미치는 영향인자 분석: 빛세기, 공기 및 이산화탄소 주입 (Effects of Limiting Factors on Cultivation of Chlorella Sp. under Red Light Emitting Diode: Light Intensity, Blowing of Air or Carbon Dioxide)

  • 최보람;이태윤
    • 한국지반환경공학회 논문집
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    • 제13권2호
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    • pp.41-47
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    • 2012
  • 본 연구는 담수미세조류의 일종인 클로렐라를 적색 발광다이오드를 이용하여 효율적으로 배양하기 위한 조건을 찾기 위해 수행되었다. 클로렐라 배양에 최적인 광량을 찾기 위해 광량을 조절하여 클로렐라가 포함된 반응기에 각각 조사하여 성장속도 및 셀농도를 측정하였다. 적색파장 사용 시, 광량이 증가할수록 성장속도는 광량에 비례하여 증가하였으나 셀농도는 지속적으로 감소하였다. 공기 공급에 따른 성장특성을 살펴보기 위해 반응기에 미세공기를 연속적으로 주입하였는데, 반응속도 및 셀농도는 공기를 주입하지 않은 경우에 비해 2배와 10배 증가함을 알 수 있었다. 고농도의 이산화탄소 주입의 경우에는 배지의 pH가 3이하로 저하되어 클로렐라의 성장이 감소하는 것을 알 수 있었다. 본 연구를 통해 클로렐라를 효과적으로 배양하기 위해서는 적색파장의 발광다이오드를 광원으로 사용하고 반응기에 공기를 연속적으로 주입하는 것이 효과적임을 알 수 있었다.

주요(主要) 밭잡초종자(雜草種子)의 발아(發芽)에 미치는 광(光)의 영향(影響) (The Effect of Light on Germination of the Major Weed Seeds in Upland Fields)

  • 우인식;최각삼;변종영
    • 한국잡초학회지
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    • 제10권4호
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    • pp.305-311
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    • 1990
  • 잡초종자(雜草種子) 발아(發芽)에 미치는 광(光)의 영향(影響)을 구명(究明)하기 위하여 왕바랭이, 냉이, 털비름, 개비름, 쇠비름, 명아주, 까마중, 강아지풀, 바랭이를 공시(供試)하여 시험(試驗)을 수행(遂行)하였다. 1. 대부분의 공시잡종(供試草種)은 $25^{\circ}C$ 이상(以上)에서 강(强)한 광발아성(光發芽性)을 보였으며 낮은 온도하(溫度下)에서는 발아(發芽)가 저조(低調)하였다. 그러나 피, 강아지풀, 바랭이는 대체적으로 발아율(發芽率)이 떨어진 반면, 털비름, 개비름, 쇠비름은 높은 발아율(發芽率)을 유지(維持)하였다. 2 개비름, 쇠비름, 털비름은 적색광하(赤色光下)에서 발아(發芽)가 촉지(促進)되었으며 원적색광(遠赤色光)에서는 발아(發芽)가 현저히 억제(抑制)되었다.3. 털비름, 개비름, 쇠비름은 red/far-red 광(光)에 의한 가역반응(可逆反應)을 나타내는 것으로 보아 종자발아시(種子發芽時) Phytochrome이 관여하고 있음을 알 수 있었고 피, 왕바랭이는 적색광(赤色光) 및 자색광(白色光)과 청색광(靑色光) 연속조사하(連續照射下)에 관여하는청색광(靑色光) 색소(色素) (HIR 색소(色素))가 관여하는 것으로 추정(推定)되었다.

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새포아풀(Poa annua sp.)의 종자휴면과 발아특성 (Seed Dormancy and Germination Characteristics of Annual Bluegrass (Poa annua L.))

  • 김태준;송재은;최정섭;조광연
    • 아시안잔디학회지
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    • 제15권1호
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    • pp.15-20
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    • 2001
  • Two types of annual bluegrass have been reported, and those consist of annual type (Poa annua ssp. annua) and perennial type (Poa annua ssp. reptans). As a weed, annual bluegrasses are commonly found in putting greens and fairways in many golf courses. Due to its strong competitiveness such as tremendous seed reproduction rate a year, prostrate growth habit, and no herbicide availability, annual bluegrasses have been considered as one of the most hard-to-control weeds in turf management systems. A growth chamber study was conducted to determine seed dormancy and to understand seed germination characteristics of annual bluegrass (Poa annua ssp. annua). Freshly harvested seeds showed 80 and 55% germination at 30 and $35^{\circ}C$, respectively, indicating that the optimum temperature of annual bluegrass is $30^{\circ}C$. However, the seed germination occurred only under light condition at any given temperature. This result demonstrated that light is prerequisite for the seed germination, and no primary dormancy of annual bluegrass seed exists. Secondary seed dormancy induced by unfavorable temperatures and dark condition was broken through 4 to 6 wk-storage at $4^{\circ}C$ with moisture, and the stored seeds germinated at $20^{\circ}C$ even under the dark. In red and far-red light trial, fresh seeds resulted in 40% germination under red while no seed germination occurred under far-red light condition, indicating that phytochrome Pr and Pfr could be related to annual bluegrass seed germination. When the far-red light replaced the red the germination was recovered, but this reversibility did not reach to the germination level under the red light only. This result implied that other lights than red and far-red would play an important role on seed germination of annual bluegrass.

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돌돔 (Oplegnathus fasciatus)의 수온 및 LED 광원에 대한 행동 분석 (Effect of water temperature and LED lights on the behavior of rock bream (Oplegnathus fasciatus))

  • 허겸;김민선;신현옥
    • 수산해양기술연구
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    • 제53권3호
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    • pp.240-245
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    • 2017
  • In order to study for the growth of fish in the aquaculture industry, the behavior analysis of rock bream (Oplegnathus fasciatus) depending on the temperature and LED lights was conducted. In this study, water temperatures from 10 to 30 degrees were used. One red light (wave length: 622 nm; light power: 811 mW) and one green light (wave length: 518 nm; light power: 648 mW) were used. Behavior of the rock bream was analyzed at an average moving distance for one minutes (AMD) and a rate of movement. The mean AMD were respectively 5.3 m, 7.3 m and 3.0 m in the red LED light, green LED light and control condition. The mean rates of movement were 77%, 88% and 61% respectively in the red LED light, green LED light and control condition. The mean AMD during 24 hours were 3.1 m, 3.1 m and 3.3 m respectively in the red LED light, green LED light and control condition.

LED 광원이 상추의 생육 및 무기물 흡수에 미치는 영향 (Effect of LEDs (Light Emitting Diodes) Irradiation on Growth and Mineral Absorption of Lettuce (Lactuca sativa L. 'Lollo Rosa'))

  • 신용습;이문중;이은숙;안준형;임재하;김하중;박후원;엄영철;박소득;채장희
    • 생물환경조절학회지
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    • 제21권3호
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    • pp.180-185
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    • 2012
  • 식물공장 내 적색광, 청색광, 적청 혼합광, 자외선, 적외선, 형광등의 광원을 달리하여 어린잎 상추의 생육과 무기성분 흡수를 검토하였다. 잎의 형태는 Red 파장에서 초장 및 하배축의 길이신장이 촉진되어 도장하였고 Far red에서는 생장이 불가능하였으나 Red + Blue의 혼합광원에서는 초장이 짧고 엽수가 많고 생체중이 증가하여 상추의 형태 및 발달 차원에서 유의적으로 좋았다. 광질에 따른 어린잎 상추의 색차 및 상대 엽록소 함량을 조사한 결과, 적색도를 나타내는 Hunter $a^*$ 값은 Red + Blue 혼합광 및 형광등에서 높았고 적색광 및 자외선에서는 낮게 나타났는데 상대 엽록소 함량을 나타내는 SPAD도 같은 경향이었다. 특히 상대엽록소 함량은 형광등의 10.5에 비해 혼합광에서 1.8배 향상된 적색도를 나타내었다. 광원별 상추의 무기물 함량을 조사한 결과, pH 및 K 함량은 모든 처리에서 차이가 없었으나 N, Ca, Mg, Mn, Fe, Ascorbic acid 함량은 LED 처리구에서 많았고 P 및 Mn 함량은 형광등 처리구에서 많았다. 이상의 결과를 요약하면 단색광에 비하여 Red + Blue 혼합광에서 상추의 생육이 우수하고 무기물 함량이 증대되어 식물공장 내 생산성 향상을 위해서는 혼합광 조절로 상품성 있는 고품질의 상추 생산이 가능 할 것으로 생각되었다.

LED 처리가 상추의 생육 및 품질에 미치는 영향 (Effect of Light Emitting Diodes Treatment on Growth and Quality of Lettuce (Lactuca sativa L. 'Oak Leaf'))

  • 신용습;이문중;이은숙;안준형;김민기;이지은;도한우;정종도;박종욱;엄영철;박소득;채장희
    • 생명과학회지
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    • 제24권2호
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    • pp.148-153
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    • 2014
  • 식물공장 내 적색광, 청색광, 적청 혼합광, 자외선, 적외선, 형광등의 광원을 달리하여 어린잎 상추의 생육과 무기성분 흡수를 검토하였다. 잎의 형태는 Red 파장에서 초장 및 하배축의 길이신장이 촉진되어 도장하였고 Far red에서는 생장이 불가능하였으나 Red+Blue의 혼합광원에서는 초장이 짧고 엽수가 많고 생체중이 증가하여 상추의 형태 및 발달 차원에서 유의적으로 좋았다. 광질에 따른 어린잎 상추의 색차 및 상대 엽록소 함량을 조사한 결과, 적색도를 나타내는 Hunter $a^*$ 값은 Red+Blue 혼합광 및 형광등에서 높았고 적색광 및 자외선에서는 낮게 나타났는데 상대 엽록소 함량을 나타내는 SPAD도 같은 경향이었다. 특히 상대엽록소 함량은 형광등의 23.3에 비해 혼합광에서 1.4배 향상된 적색도를 나타내었다. 광원별 상추의 무기물 함량을 조사한 결과, pH 및 K 함량은 모든 처리에서 차이가 없었으나 N, Ca, Mg, Fe, Ascorbic acid 함량은 LED 처리구에서 많았고 P 함량은 형광등 처리구에서 많았다. 이상의 결과를 요약하면 단색광에 비하여 Red+Blue 혼합광에서 상추의 생육이 우수하고 무기물 함량이 증대되어 식물공장 내 생산성 향상을 위해서는 혼합광 조절로 상품성 있는 고품질의 상추 생산이 가능 할 것으로 생각되었다.

Effects of LED Light Illumination on Germination, Growth and Anthocyanin Content of Dandelion (Taraxacum officinale)

  • Ryu, Jai Hyunk;Seo, Kyoung Sun;Choi, Gab Lim;Rha, Eui Shik;Lee, Sheong Chun;Choi, Seong Kyu;Kang, Si-Yong;Bae, Chang-Hyu
    • 한국자원식물학회지
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    • 제25권6호
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    • pp.731-738
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    • 2012
  • Dandelion has been widely utilized for medicinal and edible purposes. This research was conducted to evaluate the effect of supplemental LED (light-emitting diode) light on germination, growth characteristics and anthocyanin content of dandelion (Taraxacum officinale) seedling using LED blue (460 nm), red (660 nm, R), blue + red (B:R=6:4) and fluorescent lamp light treatment. By LED illumination to T. officinale seed germination speed was delayed, and germination rate was the highest in the fluorescent light. The growth characteristics (plant height, number of leaves, root length and fresh weight) were greatly influenced by supplemental LED light compared with control treatment, and the growth promotion was the most effective in the red LED illumination. After 60 days of red and mixed LED light treatments, anthocyanin content of dandelion plants was significantly changed. The anthocyanin content was increased by 12~19 mg/100 g under the red LED and the mixed light conditions compared with the control and the blue LED. Results indicate that illumination with red and mix LEDs, compared with other light treatments, is beneficial for promotion of growth and anthocyanin content in dandelion.

The effect of different colored light emitting diode illumination on egg laying performance, egg qualities, blood hormone levels and behavior patterns in Brown Tsaiya duck

  • Su, Chin-Hui;Cheng, Chih-Hsiang;Lin, Jung-Hsin;Liu, Hsiu-Chou;Yu, Yen-Ting;Lin, Chai-Ching;Chen, Wei-Jung
    • Animal Bioscience
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    • 제34권11호
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    • pp.1870-1878
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    • 2021
  • Objective: The objective of this experiment was to investigate the effects of different colors produced by light emitting diode (LED) on Brown Tsaiya ducks. Methods: A total of 144 female Brown Tsaiya ducks were randomly allocated into three individual cage rearing chambers with different LED illumination colors as treatments. Three different treatments were: i) white color, ii) blue color, and iii) red color. The experiment periods were from ducks 21 to 49 weeks of age, determined traits included i) egg laying performance, ii) feed intake, iii) egg shell breaking strength, iv) egg shell thickness, v) egg Haugh unit, vi) egg weight, vii) serum Estradiol and Progesterone concentration, and viii) behavior pattern. Results: The results indicated that when compared with white and blue color, red color could stimulate ducks sexual maturation and raised the egg laying performance. The red light group was also observed to have the highest feed intake among three treatments. The blue treatment had the lowest egg shell breaking strength and the highest egg weight among three treatments, nevertheless, no significant difference was observed among three treatments on egg shell thickness and egg Haugh unit. The red light group had higher serum estradiol concentration than the white and blue groups, but no significant difference among treatments on the serum Progesterone concentration was found. The results of behavior pattern indicated that red light group showed more feeding and less resting behavior compared to the blue light group. Conclusion: We found a potential of applying red light illumination in the indoor laying duck raising system with positive results on egg laying performance and acceptable egg weight, equivalent egg qualities compared to white and blue light.

Effects of LED Light Quality of Urban Agricultural Plant Factories on the Growth of Daughter Plants of 'Seolhyang' Strawberry

  • Lee, Kook-Han
    • 한국환경과학회지
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    • 제27권10호
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    • pp.821-829
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    • 2018
  • This study was conducted to examine the influence of Light-Emitting Diode (LED) light quality in urban agricultural plant factories on the growth and development of Seolhyang strawberry daughter plants in order to improve the efficiency of daughter plant growth and urban agriculture. LED light quality by demonstrated that above-ground growth and development were greatest for daughter plant 2. Daughter plant 1 showed the next highest growth and development, followed by daughter plant 3. Among the different qualities of LED light, the stem was thickest and growth rate of leaves was highest for R + B III (LED quality: red 660 nm + blue 450 nm/photosynthetic photon flux density (PPFD): $241-243{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) and lowest for R (red $660nm/115-117{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$). Plant height, leaf width, petiole length, and the leaf growth rate were highest for W (white fluorescent lamp/$241-243{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$) and lowest for R + B I (red 660nm+blue 450nm/$80-82{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$). For above-ground growth and development, as the plants surpassed the seedling age, mixed light (red + blue), rather than monochromatic light (red or blue), and higher PPFD values tended to increase development. Regarding the quality of the LED light, daughter plant 2 showed the highest chlorophyll content, followed by daughter plant 1, and daughter plant 3 showed the least chlorophyll content. When the wavelength was monochromatic, chlorophyll content increased, compared to that when PPFD values were increased. Mixed light vitality was highest in daughter plant 2, followed by 1, and 3, showed increased photosynthesis when PPFD values were high with mixed light, in contrast to the results observed for chlorophyll content.