Chemical composition and variability of soils from the Capps coal field, Alaska

1983 ◽  
Author(s):  
R.C. Severson ◽  
L.P. Gough
Keyword(s):  
Chemical Composition ◽  
Coal Field

Selected chemical composition of the C coal bed, Emery Coal Field, Utah

1988 ◽  
Author(s):  
S.S. Crowley ◽  
F.O. Simon ◽  
R.W. Stanton
Keyword(s):  
Chemical Composition ◽  
Coal Bed ◽  
Coal Field

The effects of volcanic ash on the maceral and chemical composition of the C coal bed, Emery Coal Field, Utah

1989 ◽  
Vol 14 (3) ◽  
pp. 315-331 ◽  
Author(s):  
Sharon S. Crowley ◽  
Ronald W. Stanton ◽  
Thomas A. Ryer
Keyword(s):  
Chemical Composition ◽  
Volcanic Ash ◽  
Coal Bed ◽  
Coal Field

Mineral and chemical composition and some trace element contents in coals and coal ashes from Huaibei coal field, China

2005 ◽  
Vol 46 (13-14) ◽  
pp. 2001-2009 ◽  
Author(s):  
Guijian Liu ◽  
Stanislav V. Vassilev ◽  
Lianfen Gao ◽  
Liugen Zheng ◽  
Zicheng Peng
Keyword(s):  
Chemical Composition ◽  
Trace Element ◽  
Coal Field ◽  
Trace Element Contents ◽  
Coal Ashes ◽  
Element Contents

The Origin of the Moon

1962 ◽  
Vol 14 ◽  
pp. 149-155 ◽  
Author(s):  
E. L. Ruskol
Keyword(s):  
Chemical Composition ◽  
Solar System ◽  
The Moon ◽  
The Earth ◽  
The Difference ◽  
Origin Of The Moon

The difference between average densities of the Moon and Earth was interpreted in the preceding report by Professor H. Urey as indicating a difference in their chemical composition. Therefore, Urey assumes the Moon's formation to have taken place far away from the Earth, under conditions differing substantially from the conditions of Earth's formation. In such a case, the Earth should have captured the Moon. As is admitted by Professor Urey himself, such a capture is a very improbable event. In addition, an assumption that the “lunar” dimensions were representative of protoplanetary bodies in the entire solar system encounters great difficulties.

On the Inhomogeneity of Chemical Composition over the Surface of 21 Per

1976 ◽  
Vol 32 ◽  
pp. 343-349
Author(s):  
Yu.V. Glagolevsky ◽  
K.I. Kozlova ◽  
V.S. Lebedev ◽  
N.S. Polosukhina
Keyword(s):  
Chemical Composition ◽  
Spectral Line ◽  
Variable Star ◽  
Radial Velocities ◽  
Crimean Astrophysical Observatory ◽  
Line Intensities ◽  
Magnetic Variable

SummaryThe magnetic variable star 21 Per has been studied from 4 and 8 Å/mm spectra obtained with the 2.6 - meter reflector of the Crimean Astrophysical Observatory. Spectral line intensities (Wλ) and radial velocities (Vr) have been measured.

Structural Studies on Mitotic Spindle Fibres

1978 ◽  
Vol 36 (3) ◽  
pp. 615-626
Author(s):  
J.R. Mcintosh
Keyword(s):  
Chemical Composition ◽  
Mitotic Spindle ◽  
Structural Studies ◽  
Mitotic Apparatus ◽  
Chemical Studies ◽  
Medical Interest ◽  
Spindle Fibres

The mitotic apparatus is a structure of obvious biological and medical interest, but it has proved to be a difficult cellular machine to understand. The chemical composition of the spindle is only slightly elucidated, largely because of the difficulties in preparing useful isolates of the structure. Chemical studies of the mitotic spindle have been reviewed elsewhere (Mcintosh, 1977), and will not be discussed further here. One would think that structural studies on the mitotic apparatus (MA) in situ would be straightforward, but even with this approach there is some disagreement in the results obtained with various methods and by different investigators. In this paper I will review briefly the approaches which have been used in structural studies of the MA, pointing out the strengths and problems of each approach. I will summarize the principal findings of the different methods, and identify what seem to be fruitful avenues for further work.

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