scholarly journals Enhancement of Crepidiastrum denticulatum Production Using Supplemental Far-red Radiation under Various White LED Lights

2021 ◽  
Vol 30 (2) ◽  
pp. 149-156
Author(s):  
Song-Yi Park ◽  
Myung-Min Oh
Keyword(s):  
White Led ◽  
Led Lights ◽  
Red Radiation

scholarly journals Blue and White LED Lights Enhance Biosynthesis of Rosmarinic Acid in Cell Culture of Agastache rugosa

2020 ◽  
Vol 20 (2) ◽  
pp. 107-114
Author(s):  
Woo Tae Park ◽  
Sun Kyung Yeo ◽  
Nam Su Kim ◽  
Jae Kwang Kim ◽  
Sang Un Park
Keyword(s):  
Cell Culture ◽  
Rosmarinic Acid ◽  
White Led ◽  
Agastache Rugosa ◽  
Led Lights

Effect of two bio-polysaccharides on organogenesis of protocorm-like bodies in Phalaenopsis cultured in vitro

2020 ◽  
Vol 26 (1) ◽  
pp. 2137-2142
Author(s):  
A. M. Meskatul ◽  
K. Shimasaki ◽  
S. U. Habiba
Keyword(s):  
Shoot Formation ◽  
Vital Role ◽  
White Led ◽  
Fresh Weight ◽  
High Concentration ◽  
Low Concentrations ◽  
Different Types ◽  
Modified Ms Medium ◽  
Led Lights

Different types of bio-polysaccharide play a vital role in the growth of PLBs cultured in vitro. In this study, to we investigated the potential impacts of two bio-polymers,: hyaluronic acid (HA9) and sodium alginate (ALG) on the organogenesis of protocorm-like bodies (PLBs) in Phalaenopsis under white LED lights. PLBs of Phalaenopsis ‘Fmk02010’ were explanted on modified MS medium with different concentrations of HA and (ALG). The highest average number of PLBs per explant (24.6) was recorded for ALG alone at a concentration of 0.01mg/L, and the fresh weight was also highest at the same concentration. The combination of 0.01mg/L ALG and 0.01mg/L HA also resulted in a large number of PLBs (23.8) and high fresh weight. As opposed to, the highest number of shoots /explant (3.6) was observed at the treatment of the combination of 1mg/L ALG and 10mg/L HA. This study shows that the application of ALG and HA alone, and in combination, at low concentrations, increased the average number of PLBs and the amount of fresh weight, but shoot formation was higher at a high concentration compared with control.

scholarly journals Impact of lighting color and duration on productive performance and Newcastle disease vaccination efficiency in broiler chickens

2019 ◽  
Vol 12 (7) ◽  
pp. 1052-1059 ◽  
Author(s):  
Essam S. Soliman ◽  
Rania A. Hassan
Keyword(s):  
Body Weight ◽  
Newcastle Disease ◽  
Body Weight Gain ◽  
Light Emitting Diode ◽  
Bacterial Load ◽  
Total Bacterial Count ◽  
White Led ◽  
Productive Performance ◽  
Blue Led ◽  
Led Lights

Background and Aim: Manipulating lighting colors and regimens is considered an effective mean for improving broiler productivity. The influence of red, blue, and white light-emitting diode (LED) was investigated using three different regimens of lighting and darkness; continuous 23 h light (L):1 h dark (D), continuous 18 h L:6 h D, and intermittent 16 h L:8 h D hours on the performance, carcass weight (CW), feed and water intake (WI), serum glucose (GLUCO), triglycerides (TG), and cholesterol (TC), intestinal bacterial load, growth and metabolic hormones, and efficiency of Newcastle disease (ND) vaccine. Materials and Methods: A total of 252 1-day-old Ross broilers on deep litter were divided into nine groups. The 1st, 4th, and 7th groups were exposed to continuous 23L:1D, the 2nd, 5th, and 8th groups were exposed to continuous 18L:6D, and the 3rd, 6th, and 9th groups were exposed to intermittent 16L:8D (4L:2D, 4 times) lighting regimen using red, blue, and white LED lights, respectively. A total of 1350 samples (225 sera, 225 swabs, and 900 organ samples) were collected. Results: Blue LED group revealed a highly significant increase (p<0.01) in live body weight, body weight gain, performance index, CW, spleen, heart, and liver weights, and anti-ND antibody titer, as well as a highly significant decline (p<0.01) of feed intake, WI, GLUCO, TG, TC, growth hormone, insulin, tri-iodothyronine (T3), tetra-iodothyronine (T4), total bacterial count (TBC), and total Enterobacteriaceae count compared to red and white LED lights in all tested lighting regimens. Continuous 23L:1D and 18L:6D regimens were significantly (p<0.01) superior to intermittent 16L:8D in their influence on the performance, CW, biochemistry, hormonal profile, and bacterial load. Conclusion: The blue LED light associated with continuous 18L:6D or 23L:1D h regimen is highly recommended in broiler houses for their enhancing the productive performance, growth, and immunity.

Highly accurate 3D wireless indoor positioning system using white LED lights

2014 ◽  
Vol 50 (11) ◽  
pp. 828-830 ◽  
Author(s):  
U. Nadeem ◽  
N.U. Hassan ◽  
M.A. Pasha ◽  
C. Yuen
Keyword(s):  
Indoor Positioning ◽  
Positioning System ◽  
White Led ◽  
Led Lights ◽  
Indoor Positioning System

Brightness perception of white LED lights with different correlated colour temperatures

2014 ◽  
Vol 24 (4) ◽  
pp. 500-513 ◽  
Author(s):  
In-Tae Kim ◽  
In-Hyun Jang ◽  
An-Seop Choi ◽  
Minki Sung
Keyword(s):  
White Led ◽  
Brightness Perception ◽  
Led Lights

scholarly journals Metabolic Analysis of Root, Stem, and Leaf of Scutellaria baicalensis Plantlets Treated with Different LED Lights

Plants ◽  
2021 ◽  
Vol 10 (5) ◽  
pp. 940
Author(s):  
Hyeon-Ji Yeo ◽  
Chang-Ha Park ◽  
Soo-Yun Park ◽  
Sun-Ok Chung ◽  
Jae-Kwang Kim ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Biological Properties ◽  
Scutellaria Baicalensis ◽  
White Led ◽  
Led Light ◽  
White Leds ◽  
Primary And Secondary Metabolites ◽  
Growing Period ◽  
Stems And Leaves ◽  
Led Lights

Light emitting diodes (LEDs) have recently been considered an efficient artificial light source in plant factories for enhancing plant growth and nutritional quality. Accordingly, this study aimed to review blue, red, and white LED light sources for efficiency and length of the growing period to produce seedlings of Scutellaria baicalensis with high nutritional value. The roots, stems, and leaves of S. baicalensis seedlings were grown under different LED lights and harvested after two and four weeks, and analyzed using high-performance liquid chromatography and gas chromatography time-of-flight mass spectrometry to identify and quantify primary and secondary metabolites. Roots, particularly in the seedlings treated with white LEDs were determined to contain the greatest concentrations of the representative compounds present in S. baicalensis: baicalin, baicalein, and wogonin, which show highly strong biological properties compared to the other plant organs. A total of 50 metabolites (amino acids, sugars, sugar alcohols, organic acids, phenolic acids, and amines) were detected in the roots, stems, and leaves of S. baicalensis seedlings, and the concentrations of primary and secondary metabolites were generally decreased with the increasing duration of LED illumination. Therefore, this study suggests that white LED light and a 2-week growing period are the most efficient conditions for the production of baicalin, baicalein, and wogonin.

scholarly journals Advancements in Low-Chill Blueberry Vaccinium corymbosum L. Tissue Culture Practices

Plants ◽  
2020 ◽  
Vol 9 (11) ◽  
pp. 1624
Author(s):  
Francesco Cappai ◽  
Alexandria Garcia ◽  
Ryan Cullen ◽  
Matthew Davis ◽  
Patricio R. Munoz
Keyword(s):  
Tissue Culture ◽  
Plant Growth ◽  
Plant Transformation ◽  
Vaccinium Corymbosum ◽  
White Led ◽  
Market Expansion ◽  
Culture Characteristics ◽  
Promote Plant Growth ◽  
Led Lights

The demand for blueberry Vaccinium corymbosum L. (and hybrids) plants has significantly increased in the last 30 years due to its market expansion. In vitro propagation of sterile plants are required for commercial purposes but also for research applications such as plant transformation. Thus far, tissue culture characteristics of the tropical-adapted blueberry have been scarcely studied. In this study we present the following findings: (i) zeatin, a hormone used to promote plant growth, should be used in the 1–2 mg/L range to promote plant architecture optimal for transformation experiments; (ii) red-blue LED lights induce more production of meristems and biomass than white LED or fluorescent lights; (iii) levels as high as 1000 mg/L of decontamination agents (the antibiotics timentin and cefotaxime) can be used to eliminate Agrobacterium overgrowth without inhibiting plant growth during plant transformation experiments; (iv) kanamycin, paromomycin, and geneticin, which are widely used antibiotics to select transgene-carrying transformants, cannot be efficiently used in this system; (v) glufosinate, a widely used herbicide, shows potential to be used as an effective selectable marker for transformed plants.

Sign in / Sign up

Export Citation Format

Share Document