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GRANULAR OPAQUE MATTER [5 records]

Record 1 2021-07-14

English

Subject field(s)
  • Solid Fossil Fuels
CONT

Opaque attritus consists of three common types of organic matter all of which are opaque to transmitted light in thin section : 1. Opaque matter... 2. Amorphous opaque matter equivalent in general to dispersed humic degradation matter in form but suggesting a fusinized mode of preservation... 3. Granular opaque matter...

French

Domaine(s)
  • Combustibles fossiles solides

Spanish

Save record 1

Record 2 2012-03-02

English

Subject field(s)
  • Origins and Composition of Coal
CONT

Constituents are the petrographic entities of the attritus that are recognizable in thin sections only by the microscope. The following constituents may be distinguished in coals : translucent humic degradation matter; brown or semitranslucent matter; opaque matter(granular, massive) ;resins and resinous matter; spores and pollen; cuticles and cuticular matter; algae and algae matter.

CONT

According to the practice at the U.S. [United States] Bureau of Mines, translucent humic degradation matter includes all humic matter less than 14 microns in width perpendicular to the bedding. May be fibrous or in fine bands. Color ranges from orange to red to brownish red ...

OBS

humic degradation matter: Finely comminuted degradation matter in coal largely but not altogether derived from the woody tissues of plants, and like anthraxylon, largely derived from lignin.

French

Domaine(s)
  • Origine et constitution des charbons
DEF

Matière humique transparente constituée de particules irrégulières, de forme et de dimension variées.

Spanish

Save record 2

Record 3 1999-10-12

English

Subject field(s)
  • Chemistry
OBS

Since the mesoscopic structure of many forms of soft condensed matter strongly scatters visible light, they appear opaque. My current research takes advantage of this multiple light scattering property for noninvasive study of opaque materials such as foams, emulsions, colloidal suspensions, granular media, and biological tissues that are inaccessible to traditional measurement techniques. From the average intensity of diffusely transmitted light we can monitor details of the mesoscopic structure, while from fluctuations in the transmitted intensity we can monitor motion within the structure itself.

French

Domaine(s)
  • Chimie
CONT

[...] les structures mésoscopiques sont des "systèmes quantiques à n corps" : leur niveau de complexité est tel que les équations qui régissent habituellement la physique quantique ne suffisent pas à les décrire.

Spanish

Save record 3

Record 4 1998-11-23

English

Subject field(s)
  • Petrography
CONT

Opaque attritus consists of three common types of organic matter all of which are opaque to transmitted light in thin section : 1. Opaque matter consisting of fusain less than 30 microns thick. 2. Amorphous opaque matter... 3. Granular opaque matter...

French

Domaine(s)
  • Pétrographie

Spanish

Save record 4

Record 5 1998-11-23

English

Subject field(s)
  • Solid Fossil Fuels
CONT

Opaque attritus consists of three common types of organic matter all of which are opaque to transmitted light in thin section : 1. Opaque matter... 2. Amorphous opaque matter... 3. Granular opaque matter consisting of discrete granules, 0. 5 to 1. 5 microns in diameter, opaque when aggregated but showing greyish to faintly brownish translucency in extremely thin section or when sufficiently dispersed in translucent humic material.

French

Domaine(s)
  • Combustibles fossiles solides

Spanish

Save record 5

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