scholarly journals Benefits and Risks of the Technological Creep of LED Light Technologies Applied to the Purse Seine Fishery

Biology ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 48
Author(s):  
Pasquale Ricci ◽  
Nicola Trivellin ◽  
Daniela Cascione ◽  
Giulia Cipriano ◽  
Viviana Teresa Orlandi ◽  
...  
Keyword(s):  
Fuel Consumption ◽  
Incandescent Lamp ◽  
Purse Seine ◽  
White Led ◽  
Long Term Effects ◽  
Blue Led ◽  
Led Light ◽  
Significant Difference ◽  
Potential Benefits ◽  
Purse Seine Fishery

This study is a first attempt to investigate the catch efficiency of LED light technology compared to the traditional incandescent lamp that is used in the purse seine fishery (PS) in the Central Adriatic Sea (Mediterranean Sea). Catches per unit effort were adopted to assess the performance of lighting systems, considering the electrical energy and the fuel consumption as effort units. Concerning the catch efficiency, the white LED, which emits the same light spectra as the incandescent lamp, increased the yield by over 2 times per consumption unit of energy and fuel. The yield efficiency increased up to approximately 6 and 9 times when adopting the pulsing white or blue LED, respectively. These increases were due to the energy savings resulting from the flashing of the white LED or by the greater water penetration of the blue LED. No significant difference in target species sizes was detected between the use of LEDs and the incandescent lamp. The results obtained from estimates of the hourly fuel consumption and CO2 emissions stress potential benefits in the reduction of the carbon footprint due to the use of LEDs within the PS fishery. Positive economic impacts were derived from the LED technology on the PS fishery, with the fuel cost-saving percentages all being higher than 60%. The LED technology clearly shows potential benefits at the economic level for the fishermen, and the possibility of mitigating indirect negative effects on the environment due to fuel combustion and greenhouse gas emissions. On the other hand, the application of new technology that improves the catch efficiency of fishing gears should be carefully considered. The lack of regulations controlling technological advancement could cause unwanted long-term effects.

scholarly journals Efek Kombinasi Musik Gamelan Gong Kebyar dan Cahaya LED (Light Emitting Diode) Terhadap Pertumbuhan dan Produktivitas Sawi Pakcoy (Brassica rapa L.)

2019 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Gede Teguh Sigmarawan ◽  
I Made Anom S. Wijaya ◽  
I Putu Gede Budisanjaya
Keyword(s):  
Plant Height ◽  
Root Length ◽  
Light Emitting Diode ◽  
Dry Weight ◽  
White Led ◽  
Blue Led ◽  
Led Light ◽  
Shoot Dry Weight ◽  
Canopy Area ◽  
Wet Weight

This study aims to (1) determine the effect of the combination of gong kebyar gamelan music and LED light on the growth and productivity of pakcoy mustard and (2) determine the combination of gong kebyar gamelan music and LED light that provides the best growth and productivity in pakcoy mustard plants. This study used pakcoy mustard plants which are given a treatment of the combination of gong kebyar gamelan music and different LED light. The first treatment used a combination of gong kebyar gamelan music and white LED light, treatment 2 used a combination of gong kebyar gamelan music and red blue LED light, and treatment 3 used a combination of gong kebyar gamelan music and blue red and white LED light. The data obtained were analyzed using one way anova test and followed by Duncan test with a confidence level of 95%. The variables observed were plant height, canopy area, leaf greenness, root length, wet weight and dry weight of plant shoots and roots. The results showed that giving a combination of gong kebyar gamelan music and LED light had a significant effect on the growth and productivity of pakcoy mustard. The combination of gong kebyar gamelan music and red blue LED light gave the best growth and productivity, with plant height, canopy area, leaf greenery, root length, shoot wet weight, root wet weight, shoot dry weight and root dry weight, respectively also included 27,176 cm, 1457.59cm2, 160.03, 23.6cm, 91.68g, 4.63g, 5.26g, 4.63g and 0.42g.

scholarly journals Effects of Light-Emitting Diodes on the Accumulation of Phenolic Compounds and Glucosinolates in Brassica juncea Sprouts

Horticulturae ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 77
Author(s):  
Chang Ha Park ◽  
Ye Eun Park ◽  
Hyeon Ji Yeo ◽  
Jae Kwang Kim ◽  
Sang Un Park
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Brassica Juncea ◽  
Light Treatment ◽  
Total Phenolic ◽  
White Led ◽  
Light Emitting ◽  
Blue Led ◽  
Led Light ◽  
Red Led

Recent improvements in light-emitting diode (LED) technology afford an excellent opportunity to investigate the relationship between different light sources and plant metabolites. Accordingly, the goal of the present study was to determine the effect of different LED (white, blue, and red) treatments on the contents of glucosinolates (glucoiberin, gluconapin, sinigrin, gluconasturtiin, 4-methoxyglucobrassicin, 4-hydroxyglucobrassicin, glucobrassicin, and neoglucobrassicin) and phenolic compounds (4-hydroxybenzonate, catechin, chlorogenic acid, caffeate, gallate, sinapate, and quercetin) in Brassica juncea sprouts. The sprouts were grown in a growth chamber at 25 °C under irradiation with white, blue, or red LED with a flux rate of 90 μmol·m−2·s−1 and a long-day photoperiod (16 h light/8 h dark cycle). Marked differences in desulfoglucosinolate contents were observed in response to treatment with different LEDs and different treatment durations. In addition, the highest total desulfoglucosinolate content was observed in response to white LED light treatment, followed by treatment with red LED light, and then blue LED light. Among the individual desulfoglucosinolates identified in the sprouts, sinigrin exhibited the highest content, which was observed after three weeks of white LED light treatment. The highest total phenolic contents were recorded after one week of white and blue LED light treatment, whereas blue LED irradiation increased the production of most of the phenolic compounds identified, including 4-hydroxybenzonate, gallate, sinapate, caffeate, quercetin, and chlorogenic acid. The production of phenolics decreased gradually with increasing duration of LED light treatment, whereas anthocyanin accumulation showed a progressive increase during the treatment. These findings indicate that white LED light is appropriate for glucosinolate accumulation, whereas blue LED light is effective in increasing the production of phenolic compounds in B. juncea sprouts.

Experience in application of red and blue LED light with infra+red component in the ENT disease treatment in children

2018 ◽  
pp. 73-79
Author(s):  
A.L. Kosakovskyi ◽  
◽  
S.O. Gulyar ◽  
I.A. Kosakivska ◽  
N.P. Grushetska ◽  
...  
Keyword(s):  
Disease Treatment ◽  
Blue Led ◽  
Led Light ◽  
Infra Red

Photocontrolled iodine-mediated reversible-deactivation radical polymerization with a semifluorinated alternating copolymer as the macroinitiator

2020 ◽  
Vol 11 (47) ◽  
pp. 7497-7505
Author(s):  
Jiannan Cheng ◽  
Kai Tu ◽  
Enjie He ◽  
Jinying Wang ◽  
Lifen Zhang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Radical Polymerization ◽  
Room Temperature ◽  
Blue Led ◽  
Led Light ◽  
Alternating Copolymers ◽  
Alternating Copolymer ◽  
Reversible Deactivation ◽  
Novel Strategy ◽  
Reversible Deactivation Radical Polymerization

A novel strategy for preparing block copolymers with semifluorinated alternating copolymers as macroinitiators was established by photocontrolled iodine-mediated RDRP under irradiation with blue LED light at room temperature.

scholarly journals Using the Life Story Book With Mentally Alert Residents of Nursing Homes

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 487-487
Author(s):  
Theresa Chrisman
Keyword(s):  
Depressive Symptoms ◽  
Nursing Homes ◽  
Meaning In Life ◽  
Life Story ◽  
Well Being ◽  
Post Intervention ◽  
Significant Difference ◽  
Wilks Lambda ◽  
Potential Benefits ◽  
Hispanic White

Abstract Depression and lack of meaning in life (MIL) are common among residents of nursing homes (NHs) and contribute to a reduction in overall health and well-being. Life Story Book (LSB), a reminiscence intervention, is designed to provide a person with the opportunity to review their past and capture their life stories and photographs into a book. LSB has demonstrated positive outcomes for residents of NHs with dementia, yet little is known for residents without dementia. A switching replication design was used to examine the effects of LSB among 21 mentally alert residents from two NHs (NH-A and NH-B) in Houston, Texas. Participants in NH-A received three weeks of the LSB intervention, while NH-B received three weeks of care-as-usual; the intervention was then switched. The GDS-12R and the MIL questionnaire (MLQ) were used to measure depressive symptoms and MIL respectively. Participants from NH-A (n =11) and NH-B (n = 10) had a mean age of 75 years (SD =11.34); 81% female; 52% non-Hispanic white and 33% African American. Results from a one-way MANCOVA found no statistically significant difference on the GDS-12R and MLQ (F(3, 14) = 2.50, p = .102; Wilks’ Lambda = .652; η2 = .35). Further analyses comparing the pre-intervention and post-intervention scores for the entire sample (N =21) found a significant reduction in depressive symptoms (M = 2.67; SD = 2.52) and (M =1.67, SD = 2.29); (t (20) = 2.21, p = 0.039). The potential benefits of LSB for mentally alert residents of NHs warrants further research.

scholarly journals Antarctic krill (Euphausia superba) exhibit positive phototaxis to white LED light

Polar Biology ◽  
2021 ◽  
Vol 44 (3) ◽  
pp. 483-489
Author(s):  
Bjørn A. Krafft ◽  
Ludvig A. Krag
Keyword(s):  
Antarctic Krill ◽  
Light Exposure ◽  
Euphausia Superba ◽  
Marine Species ◽  
Artificial Light ◽  
White Led ◽  
Light Emitting ◽  
Positive Phototaxis ◽  
Led Light ◽  
Exposure Experiment

AbstractThe use of light-emitting diodes (LEDs) is increasingly used in fishing gears and its application is known to trigger negative or positive phototaxis (i.e., swimming away or toward the light source, respectively) for some marine species. However, our understanding of how artificial light influences behavior is poorly understood for many species and most studies can be characterized as trial and error experiments. In this study, we tested whether exposure to white LED light could initiate a phototactic response in Antarctic krill (Euphausia superba). Trawl-caught krill were used in a controlled artificial light exposure experiment conducted onboard a vessel in the Southern Ocean. The experiment was conducted in chambers with dark and light zones in which krill could move freely. Results showed that krill displayed a significant positive phototaxis. Understanding this behavioral response is relevant to development of krill fishing technology to improve scientific sampling gear, improve harvest efficiency, and reduce potential unwanted bycatch.

Microbicidal effect of 405-nm blue LED light on Candida albicans and Streptococcus mutans dual-species biofilms on denture base resin

2021 ◽  
Author(s):  
Chiaki Tsutsumi-Arai ◽  
Yuki Arai ◽  
Chika Terada-Ito ◽  
Takahiro Imamura ◽  
Seiko Tatehara ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Streptococcus Mutans ◽  
Denture Base ◽  
Blue Led ◽  
Led Light ◽  
Base Resin ◽  
Denture Base Resin
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