scholarly journals INVESTIGATION OF CRYOGENIC TEMPERATURES INFLUENCE ON VALVE SEALS PRESSURIZATION INCREASE

2021 ◽  
Vol 6 (3) ◽  
pp. 6-10
Author(s):  
Yu. I. Kondrashov ◽  
A. L. Lopatin
Keyword(s):  
Liquid Hydrogen ◽  
Short Description ◽  
Cryogenic Temperatures ◽  
Specific Load ◽  
Comparative Tests ◽  
Valve Sealing ◽  
Experimental Researches

This article deals with short description of cryogenic valves and calculation of specific load in sealing, results of experimental researches of separate dimensions of multi-layer bellows and results of comparative tests of valve sealing. Plant of valve testing in liquid hydrogen is also described.

Cryogenic atomic force microscopy

1991 ◽  
Vol 49 ◽  
pp. 54-55
Author(s):  
K. A. Fisher ◽  
M. G. L. Gustafsson ◽  
M. B. Shattuck ◽  
J. Clarke
Keyword(s):  
Room Temperature ◽  
Rapid Freezing ◽  
Cryogenic Temperatures ◽  
Soft Or ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Flexible Molecules ◽  
Advantages And Disadvantages ◽  
Atomic Force ◽  
Chemical Perturbation

The atomic force microscope (AFM) is capable of imaging electrically conductive and non-conductive surfaces at atomic resolution. When used to image biological samples, however, lateral resolution is often limited to nanometer levels, due primarily to AFM tip/sample interactions. Several approaches to immobilize and stabilize soft or flexible molecules for AFM have been examined, notably, tethering coating, and freezing. Although each approach has its advantages and disadvantages, rapid freezing techniques have the special advantage of avoiding chemical perturbation, and minimizing physical disruption of the sample. Scanning with an AFM at cryogenic temperatures has the potential to image frozen biomolecules at high resolution. We have constructed a force microscope capable of operating immersed in liquid n-pentane and have tested its performance at room temperature with carbon and metal-coated samples, and at 143° K with uncoated ferritin and purple membrane (PM).

Influence of Ultrasound on the Formation of High-energy Particle Tracks in a Liquid-hydrogen Bubble Chamber

1969 ◽  
Vol 99 (9) ◽  
pp. 149-151
Author(s):  
V.A. Akulichev ◽  
L.R. Gavrilov ◽  
V.G. Grebinnik ◽  
V.A. Zhukov ◽  
G. Libman ◽  
...  
Keyword(s):  
Bubble Chamber ◽  
High Energy ◽  
Liquid Hydrogen ◽  
High Energy Particle ◽  
Hydrogen Bubble ◽  
Hydrogen Bubble Chamber ◽  
Energy Particle ◽  
Particle Tracks

COMPARATIVE TESTS OF VARIOUS SOURCES OF MICROELEMENTS IN FEEDING CHICKEN-BROILERS

2018 ◽  
Vol 53 (2) ◽  
pp. 393-403
Author(s):  
Е.А. Sizova ◽  
◽  
S.А. Miroshnikov ◽  
S.V. Lebedev ◽  
Yu.I. Levakhin ◽  
...  
Keyword(s):  
Comparative Tests
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