Convection in horizontal high‐pressure mercury, mercury plus iodine, and metal halide additive arcs

1981 ◽  
Vol 52 (1) ◽  
pp. 199-209 ◽  
Author(s):  
D. K. McLain ◽  
R. J. Zollweg
Keyword(s):  
High Pressure ◽  
Metal Halide

Structural regulation and optical behavior of three-dimensional metal halide perovskites under pressure

2020 ◽  
Vol 8 (37) ◽  
pp. 12755-12767
Author(s):  
Yue Shi ◽  
Yu Zhou ◽  
Zhiwei Ma ◽  
Guanjun Xiao ◽  
Kai Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Three Dimensional ◽  
Metal Halide ◽  
Structural Regulation ◽  
Halide Perovskites ◽  
Optical Behavior

The high-pressure behaviors of three-dimensional (3D) metal halide perovskites (MHPs) have been summarized in this “scientific dictionary”.

UV-B response of cucumber seedlings grown under metal halide and high pressure sodium/deluxe lamps

1993 ◽  
Vol 88 (2) ◽  
pp. 350-358 ◽  
Author(s):  
Donald T. Krizek ◽  
George F. Kramer ◽  
Abha Upadhyaya ◽  
Roman M. Mirecki
Keyword(s):  
High Pressure ◽  
Metal Halide ◽  
Cucumber Seedlings

The influence of metal halide and high-pressure sodium lamps during photoperiod extension on the allocation of carbon between lignin and cellulose in black spruce seedlings

1988 ◽  
Vol 18 (7) ◽  
pp. 962-964 ◽  
Author(s):  
Hank A. Margolis ◽  
Jacques Bégin ◽  
Richard Beeson ◽  
Pierre Bellefleur
Keyword(s):  
High Pressure ◽  
Light Source ◽  
Black Spruce ◽  
Metal Halide ◽  
Photon Flux ◽  
Photon Flux Density ◽  
Seedling Height ◽  
Active Radiation ◽  
Seedling Biomass

Containerized black spruce seedlings (Piceamariana (Mill.) B.S.P.) were grown at the greenhouse at CIP Inc., Harrington, Québec, from February until May, 1987. We wished to test whether differences in the quantity and quality of light received from two commercially available lamps during photoperiod extension would alter the allocation of carbon between lignin and cellulose in shoots and roots. Photoperiods were extended from 17:00 to 01:00 using either metal halide and high-pressure sodium lamps together or high-pressure sodium lamps alone. At night, the treatment using both types of lamp together increased the photon flux density of blue light (400–500 nm) at seedling height 10-fold, from 0.32 to 3.2 μE m−2 s−1. Photosynthetically active radiation was increased 4-fold, from 4.5 to 17.9 μE m−2 s−1. Total seedling biomass did not differ statistically between light treatments at any given time. However, seedling biomass averaged over all times was statistically higher (p ≤ 0.03) for seedlings in the treatment using both types of lamp together. Percent lignin, percent cellulose, and lignin to cellulose ratios were not significantly affected by the light source used during photoperiod extension. As expected, percent lignin and percent cellulose in shoots and roots increased significantly with time. The percentage of seedlings judged unacceptable because of spiralized stems was not affected by light source and averaged 21.9%.

X-ray absorption tomography of a high-pressure metal-halide lamp with a bent arc due to Lorentz-forces

2008 ◽  
Vol 41 (14) ◽  
pp. 144021 ◽  
Author(s):  
N Denisova ◽  
M Haverlag ◽  
E J Ridderhof ◽  
T Nimalasuriya ◽  
J J A M van der Mullen
Keyword(s):  
High Pressure ◽  
Metal Halide ◽  
X Ray ◽  
Metal Halide Lamp ◽  
Lorentz Forces ◽  
X Ray Absorption

Comparison Research of Street Lamps: Characteristic Parameters and Lighting Performance of Light-Emitting Diodes, High Pressure Sodium Lamps and Ceramic Discharge Metal Halide Lamps

2012 ◽  
Vol 229-231 ◽  
pp. 2610-2614
Author(s):  
Min Li ◽  
Qiu Yi Han ◽  
Wei Li ◽  
Shui Jun Shi ◽  
Hao Jun Zhang ◽  
...  
Keyword(s):  
High Pressure ◽  
Light Emitting Diodes ◽  
Metal Halide ◽  
Laboratory Measurements ◽  
Characteristic Parameters ◽  
Light Emitting ◽  
Road Lighting ◽  
Comparison Research ◽  
Color Rendering ◽  
Metal Halide Lamps

As a rapid developing solid state lighting, light-emitting diodes (LEDs) have great potential in application of road lighting, but their performance evaluation in a long term are still lacked. In situ and laboratory measurements were conducted for the purpose of comparing the characteristic parameters and lighting performance of three kinds of street lamps: LEDs, high pressure sodium (HPS) lamps and ceramic discharge metal halide (CDM) lamps. The results of laboratory measurements in 2000 hours show the three kinds of lamps have almost the same initial luminaire efficacy, which lead to the average road illuminance is proportion to the lamp power. The results of road illuminance distribution measurements in 3000 hours show LEDs have better color rendering index, longitudinal uniformity of illuminance, and maintenance of road illuminance than HPS and CDM lamps.

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