EFFECTS OF RED AND FAR-RED LIGHT ON THE GROWTH AND MORPHOLOGY OF POTATO PLANTLETS IN VITRO: USING LIGHT EMITTING DIODE AS A LIGHT SOURCE FOR MICROPROPAGATION.

1995 ◽  
pp. 189-194 ◽  
Author(s):  
Y. Miyashita ◽  
Y. Kitaya ◽  
T. Kozai ◽  
T. Kimura
Keyword(s):  
Light Source ◽  
Light Emitting Diode ◽  
Red Light ◽  
Light Emitting ◽  
Potato Plantlets

scholarly journals Toluidine blue O and porphyrin-mediated photodynamic therapy on three main pathogenic bacteria of periodontitis using portable LED phototherapy device

2015 ◽  
Vol 08 (04) ◽  
pp. 1550017 ◽  
Author(s):  
Xuewei Jiang ◽  
Zhichao Fan ◽  
Yili Yu ◽  
Chenying Shao ◽  
Yuanzhen Suo ◽  
...  
Keyword(s):  
Photodynamic Therapy ◽  
Toluidine Blue ◽  
Pathogenic Bacteria ◽  
Light Emitting Diode ◽  
Red Light ◽  
In Vitro Screening ◽  
Light Emitting ◽  
Led Phototherapy ◽  
Prevotella Melaninogenica

Photodynamic therapy (PDT) has been commonly used in treating many diseases, such as cancer and infectious diseases. We investigated the different effects of PDT on three main pathogenic bacteria of periodontitis — Prevotella melaninogenica (P.m.), Porphyromonas gingivalis (P.g.) and Aggregatibacter actinomycetemcomitans (A.a.). The portable red light-emitting diode (LED) phototherapy device was used to assess the exogenous PDT effects with different light doses and photosensitizer concentrations (Toluidine blue O, TBO). The portable blue LED phototherapy device was used to assess the endogenous PDT effects with the use of endogenous photosensitizers (porphyrin) under different light doses. We found out that both exogenous and endogenous PDT were able to restrict the growth of all the three bacteria significantly. Moreover, the optimal PDT conditions for these bacteria were obtained through this in vitro screening and could guide the clinical PDT on periodontitis.

Responses of Favorita Potato Plantlets Cultured in Vitro under Fluorescent and Light-Emitting Diode (LED) Light Sources

2019 ◽  
Vol 96 (4) ◽  
pp. 396-402 ◽  
Author(s):  
Lili Jiang ◽  
Ziquan Wang ◽  
Guanghui Jin ◽  
Dianqiu Lu ◽  
Xuezhan Li
Keyword(s):  
Light Emitting Diode ◽  
Light Sources ◽  
Light Emitting ◽  
Led Light ◽  
Potato Plantlets

scholarly journals Lightwave-reinforced stem cells with enhanced wound healing efficacy

2021 ◽  
Vol 12 ◽  
pp. 204173142110670
Author(s):  
Yu-Jin Kim ◽  
Hye Ran Jeon ◽  
Sung-Won Kim ◽  
Yeong Hwan Kim ◽  
Gwang-Bum Im ◽  
...  
Keyword(s):  
Stem Cells ◽  
Light Emitting Diode ◽  
Red Light ◽  
Cell Therapies ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Cell Adhesion And Migration ◽  
Cellular Capacity ◽  
And Migration

Comprehensive research has led to significant preclinical outcomes in modified human adipose-derived mesenchymal stem cells (hADSCs). Photobiomodulation (PBM), a technique to enhance the cellular capacity of stem cells, has attracted considerable attention owing to its effectiveness and safety. Here, we suggest a red organic light-emitting diode (OLED)-based PBM strategy to augment the therapeutic efficacy of hADSCs. In vitro assessments revealed that hADSCs basked in red OLED light exhibited enhanced angiogenesis, cell adhesion, and migration compared to naïve hADSCs. We demonstrated that the enhancement of cellular capacity was due to an increased level of intracellular reactive oxygen species. Furthermore, accelerated healing and regulated inflammatory response was observed in mice transplanted with red light-basked hADSCs. Overall, our findings suggest that OLED-based PBM may be an easily accessible and attractive approach for tissue regeneration that can be applied to various clinical stem cell therapies.

scholarly journals Growth of Potato Plantlets In Vitro Is Different When Provided Concurrent Versus Alternating Blue and Red Light Photoperiods

HortScience ◽  
2004 ◽  
Vol 39 (2) ◽  
pp. 380-382 ◽  
Author(s):  
Ruey-Chi Jao ◽  
Wei Fang
Keyword(s):  
Blue Light ◽  
Red Light ◽  
Dry Weight ◽  
Optimal Growth ◽  
Similar Proportion ◽  
Light Emitting ◽  
Long Duration ◽  
Plantlet Growth ◽  
Potato Plantlets

Effects of concurrent vs. alternating blue and red light using light-emitting diodes (LEDs) on the photomixotrophic growth of potato plantlets in vitro were investigated. All seven treatments had the same 5.53 mol·m-2 daily light integral (DLI), photoperiod (16-hour day/8-hour night) and similar proportion of red light (45%) and blue light (55%). Results showed that the fresh/dry weight accumulation of potato plantlets in vitro under the concurrent blue and red light was superior than that under the alternating blue and red light, indicating that the simultaneous coexistence of blue and red light are necessary for optimum plantlet growth. Low PPF with long duration was better than high PPF with short duration under same DLI. Within the concurrent blue and red light treatments, when the duration of blue light was shorter than that of red light, timing of the blue light affected the growth of potato plantlets in vitro. Providing blue and red light together at the beginning of the photoperiod resulted in optimal growth, however plantlets illuminated with alternately blue and red light had significantly less fresh/dry weight accumulation.

scholarly journals Influence of macronutrients, sucrose and LED on in vitro culture of Lomatozona artemisiifolia (Asteraceae - Eupatorieae)

Rodriguésia ◽  
2021 ◽  
Vol 72 ◽  
Author(s):  
Lívia Cristina da Silva ◽  
Marlene Pires Moreira ◽  
Andreia Alves da Costa Silveira ◽  
Sérgio Tadeu Sibov
Keyword(s):  
In Vitro Culture ◽  
Higher Plants ◽  
Light Emitting Diode ◽  
Red Light ◽  
Shoot Proliferation ◽  
Nodal Segments ◽  
Light Emitting ◽  
Rupestrian Fields ◽  
Nutritional Needs

Abstract Balanced levels of macronutrients and sucrose may ensure the success of micropropagation of the endangered ones. This study aimed to evaluate the effect of levels of salts in the culture medium on in vitro culture of Lomatozona artemisiifolia, as well as to determine the influence of light emitting diode (LED) on the shoot proliferation and rooting of the species. Nodal segments were used to evaluate the different macronutrient concentrations of MS medium (25, 50 and 100%), as well as sucrose concentrations (0.0 mM; 0.34 mM; 0.68 mM and 1.03 mM). Five light conditions were evaluated at shoots proliferation and rooting [100% blue (455 nm); 100% red (630 nm); 30% blue + 70% red; 30% red + 70% blue or fluorescent white]. Low levels of macronutrients in MS (50% and 25%) and sucrose (0.00 mM and 0.34 mM) resulted in plants with higher height, number of shoots and higher production of photosynthetic pigments. The 100% red light promoted rooting of 100% of the plants, and in 100% red or 70% red + 30% blue, higher plants were observed. These results demonstrate that under in vitro conditions, L. artemisiifolia has low nutritional needs, typical of plants that live in rupestrian fields.

scholarly journals Light-Emitting Diode-Based Illumination System forIn VitroPhotodynamic Therapy

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Defu Chen ◽  
Huifen Zheng ◽  
Zhiyong Huang ◽  
Huiyun Lin ◽  
Zhidong Ke ◽  
...  
Keyword(s):  
Light Source ◽  
Aminolevulinic Acid ◽  
Light Emitting Diode ◽  
Air Cooling ◽  
Medium Temperature ◽  
Light Emitting ◽  
Illumination System ◽  
Led Array ◽  
Red Led

The aim of this study is to develop a light-emitting diode- (LED-) based illumination system that can be used as an alternative light source forin vitrophotodynamic therapy (PDT). This illumination system includes a red LED array composed of 70 LEDs centered at 643 nm, an air-cooling unit, and a specific-designed case. The irradiance as a function of the irradiation distance between the LED array and the sample, the homogeneity and stability of irradiation, and the effect of long-time irradiation on culture medium temperature were characterized. Furthermore, the survival rate of the CNE1 cells that sensitized with 5-aminolevulinic acid after PDT treatment was evaluated to demonstrate the efficiency of the new LED-based illumination system. The obtained results show that the LED-based illumination system is a promising light source forin vitroPDT that performed in standard multiwell plate.

Comparison of the effects of operating microscopes with light emitting diode and halogen light source on the eye: a rabbit study

2021 ◽  
pp. 1-7
Author(s):  
Bahri Aydın ◽  
Armagan Ozgur ◽  
Huseyin Baran Ozdemir ◽  
Pınar Uyar Gocun ◽  
Mehmet Arda Inan ◽  
...  
Keyword(s):  
Light Source ◽  
Light Emitting Diode ◽  
Light Emitting ◽  
Halogen Light ◽  
Halogen Light Source
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