scholarly journals A solid-state amorphous selenium avalanche technology for low photon flux imaging applications

2010 ◽  
Vol 37 (9) ◽  
pp. 4982-4985 ◽  
Author(s):  
M. M. Wronski ◽  
W. Zhao ◽  
A. Reznik ◽  
K. Tanioka ◽  
G. DeCrescenzo ◽  
...  
Keyword(s):  
Solid State ◽  
Amorphous Selenium ◽  
Photon Flux

Charge transport model in solid-state avalanche amorphous selenium and defect suppression design

2016 ◽  
Vol 119 (2) ◽  
pp. 024508 ◽  
Author(s):  
James R. Scheuermann ◽  
Yesenia Miranda ◽  
Hongyu Liu ◽  
Wei Zhao
Keyword(s):  
Solid State ◽  
Charge Transport ◽  
Transport Model ◽  
Amorphous Selenium

scholarly journals Effect of supplemental UV-A irradiation in solid-state lighting on the growth and phytochemical content of microgreens

2015 ◽  
Vol 29 (1) ◽  
pp. 13-22 ◽  
Author(s):  
A. Brazaitytė ◽  
A. Viršilė ◽  
J. Jankauskienė ◽  
S. Sakalauskienė ◽  
G. Samuolienė ◽  
...  
Keyword(s):  
Solid State ◽  
Radical Scavenging Activity ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Solid State Lighting ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Phytochemical Content ◽  
Positive Effects ◽  
Almost All

Abstract In this study, we sought to find and employ positive effects of UV-A irradiation on cultivation and quality of microgreens. Therefore, the goal of our study was to investigate the influence of 366, 390, and 402 nm UV-A LED wavelengths, supplemental for the basal solid-state lighting system at two UV-A irradiation levels on the growth and phytochemical contents of different microgreen plants. Depending on the species, supplemental UV-A irradiation can improve antioxidant properties of microgreens. In many cases, a significant increase in the investigated phytochemicals was found under 366 and 390 nm UV-A wavelengths at the photon flux density (12.4 μmol m-2 s-1). The most pronounced effect of supplemental UV-A irradiation was detected in pak choi microgreens. Almost all supplemental UV-A irradiation treatments resulted in increased leaf area and fresh weight, in higher 2,2-diphenyl-1-picrylhydrazyl free-radical scavenging activity, total phenols, anthocyanins, ascorbic acid, and α-tocopherol.

Solid-state flat panel imager with avalanche amorphous selenium

2016 ◽  
Author(s):  
James R. Scheuermann ◽  
Adrian Howansky ◽  
Amir H. Goldan ◽  
Olivier Tousignant ◽  
Sébastien Levéille ◽  
...  
Keyword(s):  
Solid State ◽  
Amorphous Selenium ◽  
Flat Panel

scholarly journals Decrease in Nitrate Concentration in Leafy Vegetables Under a Solid-state Illuminator

HortScience ◽  
2009 ◽  
Vol 44 (7) ◽  
pp. 1857-1860 ◽  
Author(s):  
Giedrė Samuolienė ◽  
Akvilė Urbonavičiūtė ◽  
Pavelas Duchovskis ◽  
Zenonas Bliznikas ◽  
Pranciškus Vitta ◽  
...  
Keyword(s):  
Solid State ◽  
Nitrate Concentration ◽  
Day Treatment ◽  
Substantial Reduction ◽  
Reduction Rate ◽  
Leaf Tissue ◽  
Leafy Vegetables ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Tissue Aging

We report on a substantial reduction of nitrate concentration in leafy vegetables that were subjected to short-term preharvest treatment by narrow-bandwidth red light of high photosynthetic photon flux density generated by a solid-state illuminator. Lettuce (Lactuca sativa cv. Grand rapids), marjoram (Majorana hortensis, Moench.), and green onions (Allium cepa, L. cv. Lietuvos didieji) were grown to harvest time within a greenhouse under daylight with supplementary lighting provided by standard high-pressure sodium lamps (130 μmol·m−2·s−1). A subsequent 3-day treatment within a phytotron under 638-nm light-emitting diodes (500 μmol·m−2·s−1) resulted in the reduction of nitrate concentration by 44% to 65%. The reduction of nitrates was accompanied by an increased concentration of nutritionally valuable carbohydrates, which is also in line with stimulation of expression of nitrate reductase by photosynthetic metabolites. Another indicator of nutritional quality, the content of vitamin C, exhibited some variation that was not directly correlated with the nitrate reduction rate that may be attributed to carbohydrate content variation and leaf tissue aging.

THE EFFECT OF PHOTOSYNTHETIC PHOTON FLUX DENSITY ON CUCUMBER AND TOMATO TRANSPLANTS ASSIMILATIVE INDICES

2015 ◽  
Author(s):  
Aistė Bagdonavičienė ◽  
Aušra Brazaitytė ◽  
Julė Jankauskienė ◽  
Pavelas Duchovskis
Keyword(s):  
Solid State ◽  
Leaf Area ◽  
Weight Ratio ◽  
Photosynthetic Photon Flux Density ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Photosynthetic Photon Flux ◽  
Light Emitting ◽  
Net Assimilation ◽  
Positive Effect

The objective of our studies was to evaluate the assimilative indices of cucumber (‘Pasalimo F1’) and tomato (‘Marissa F1’) transplants, cultivated under various photosynthetic photon flux densities (PPFD) were provided by light-emitting diodes (LEDs). Experiment was performed in phytotron complex of Institute of Horticulture, LRCAF. A system of high-power, solid-state lighting modules with 92 % 638 nm (red) + 665 nm (red) + 731 nm (far red) and 8 % 447 nm (blue) was used in the experiments. The generated PPFD of each type of five solid-state modules was ~200 and ~400 μmol m-2 s-1. Our experiment revealed that increased net assimilation rate (NAR) depended on increased PPFD of cucumber and tomato hybrid. 400 μmol m-2 s-1 LED illumination had positive effect on relative growth rate (RGR). Cucumbers which were grown under 200 μmol m-2 s-1 had bigger leaf area ratio (LAR) and specific leaf area (SLA), their development has been bigger as compared to higher 400 μmol m-2 s-1 PPFD. High PPFD LED illumination had positive effect on leaf weight ratio (LWR), shoot root ratio (SRR) and tomato transplants development. These studies with various photosynthetic photon flux densities (PPFD) and LEDs light should be continued throughout plant vegetation.

High Photon Flux 70 eV HHG Source for Applications in Molecular and Solid State Physics

2016 ◽  
Author(s):  
Steffen Hädrich ◽  
Jan Rothhardt ◽  
Robert Klas ◽  
Maxim Tschernajew ◽  
Armin Hoffmann ◽  
...  
Keyword(s):  
State Physics ◽  
Solid State ◽  
Photon Flux ◽  
Solid State Physics ◽  
High Photon Flux

scholarly journals Development of solid-state avalanche amorphous selenium for medical imaging

2015 ◽  
Vol 42 (3) ◽  
pp. 1223-1226 ◽  
Author(s):  
James R. Scheuermann ◽  
Amir H. Goldan ◽  
Olivier Tousignant ◽  
Sébastien Léveillé ◽  
Wei Zhao
Keyword(s):  
Solid State ◽  
Medical Imaging ◽  
Amorphous Selenium
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