Effect of the disperse composition of drops of Al2O3 in flames on their coefficients of absorption and scattering

1976 ◽  
Vol 12 (3) ◽  
pp. 356-362 ◽  
Author(s):  
L. P. Bakhir ◽  
G. I. Levashenko ◽  
V. V. Tamanovich
Keyword(s):  
Disperse Composition ◽  
Coefficients Of Absorption

Influence of Encapsulation of Fullerenes on Optical and Thermoelectric Properties of Carbon Nanotubes

2021 ◽  
Vol 26 (2) ◽  
pp. 123-131
Author(s):  
E.V. Morozova ◽  
◽  
D.A. Timkaeva ◽  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Figure Of Merit ◽  
C60 Fullerene ◽  
Zone Structure ◽  
Thermoelectric Figure ◽  
High Frequencies ◽  
The One ◽  
Coefficients Of Absorption

The hybrid systems based on the carbon nanotubes (CNT) and fullerenes (nanopipodes) are promising for applications in nanoelectronics. With insignificant variation of the CNT diameter the change of the fullerenes geometry takes place. The periodically located inside fullerenes represent a set of quantum points in the one-dimensional super-lattice. Using the variation of inside fullerenes it is possible to modulate the zone structure of the CNT – fullerene system and to control the electronic and phonon characteristics of nanopipodes. In the work the optical and thermoelectric properties of CNT with encapsulated molecules of C60 fullerene have been investigated. Using the first-principle methods the coefficients of absorption, optical conductivi-ty, thermal conductivity, thermoelectric figure of merit for CNT with fullerenes, periodically lo-cated inside the nanotubes at different distances from each other, have been calculated. It has been shown that with decreasing the distance between fullerenes the optical conductivity of CNT – C60 is suppressed at high frequencies. It has been determined that the conductance of the structures with fullerenes is less than the conductance of a clean tube, and approximately equal for considered distances (12.3 and 19.7 Å) between fullerenes. The CNT thermal conductivity due to the encapsulation of fullerenes considerably (3–4 times) decreases for the considered CNT (8.8) – C60 systems.

Choosing respiration with allowance for the disperse composition and concentration of dust-laden air

Metallurgist ◽  
1986 ◽  
Vol 30 (10) ◽  
pp. 378-379
Author(s):  
V. A. Kitaev ◽  
V. I. Korneev
Keyword(s):  
Disperse Composition

scholarly journals PROPERTIES OF THE CAUSATIVE AGENT OF A CHICKEN TUMOR

1932 ◽  
Vol 55 (3) ◽  
pp. 441-444 ◽  
Author(s):  
Ernest Sturm ◽  
Frederick L. Gates ◽  
James B. Murphy
Keyword(s):  
Spectral Analysis ◽  
Incident Light ◽  
Common Factor ◽  
Ultra Violet ◽  
Biological Cells ◽  
Spectral Absorption ◽  
Violet Light ◽  
Chemical Character ◽  
Coefficients Of Absorption ◽  
Tumor Agent

Even though part of the energy of the incident light is probably absorbed by chemical entities which play no part in the specific reaction of inactivation, nevertheless the wave lengths most active in destroying biological cells or agents will presumably be found to be among those absorbed in the highest proportion. This would indicate that the curves here presented are approximately reciprocal to the coefficients of absorption of particular substances, the destruction of which caused the inactivation of the agents or the death of the cells. The similarity between the curves for bacteria, virus, and phage, both in shape and in total involved energies, suggests the presence of a common factor, or of closely related chemical entities, sensitive to ultra-violet light, whereas the data for the tumor agent suggest that its inactivation is due to the destruction of a substance having an essentially different spectral absorption, and therefore of a different chemical character. While the amount of ultra-violet energy required to affect the tumor agent is great, it is still less than that involved in the inactivation of some of the enzymes (7). A study is under way to compare the deduced spectral analysis with the actual coefficients of absorption of the highly purified tumor agent.

THE ATTENUATION OF HIGH-AMPLITUDE WAVES IN ROCKS

1964 ◽  
Vol 42 (3) ◽  
pp. 526-534
Author(s):  
R. F. Mereu
Keyword(s):  
Absorption Coefficient ◽  
Seismic Energy ◽  
High Amplitude ◽  
Absorption Coefficients ◽  
The Absolute ◽  
Coefficients Of Absorption

The pin-contactor method was modified so that it could be used to measure coefficients of absorption of high-amplitude waves in cylinders of rocks and metals. Experiments performed with granite, marble, and aluminum showed that the coefficients of absorption for marble and aluminum for pressures below 100 kb are more than three times that for granite. Also, for pressures greater than 22 kb the absorption coefficient for marble is more than twice that for pressures below this level. It should be emphasized that the absolute values of the absorption coefficients found in these experiments depend on the geometry; however, the relative values indicate the extent of the differences in the properties of the rocks. The compressibilities of both marble and granite were found to be constant for pressures in the 2 to 100 kb range. The results of these experiments and similar ones could lead to a better understanding of how the energy of explosions can be coupled into seismic energy more efficiently.

Effect of density and disperse composition of solid particles on the structure of a developed fluidized bed

1988 ◽  
Vol 22 (5) ◽  
pp. 717-722
Author(s):  
A. M. Vasil'ev ◽  
A. S. Zheleznov ◽  
A. A. Oigenblik ◽  
Yu. A. Sergeev ◽  
V. G. Tsibul'skii
Keyword(s):  
Fluidized Bed ◽  
Solid Particles ◽  
Disperse Composition
Sign in / Sign up

Export Citation Format

Share Document