A New Component of the Interstellar Matter: Small Grains and Large Aromatic Molecules

1989 ◽  
Vol 27 (1) ◽  
pp. 161-198 ◽  
Author(s):  
J. L. Puget ◽  
A. Léger
Keyword(s):  
Interstellar Matter ◽  
Aromatic Molecules ◽  
Small Grains

scholarly journals The PAH Hypothesis and the Extinction Curve

1989 ◽  
Vol 135 ◽  
pp. 173-180
Author(s):  
A. Léger ◽  
L. Verstraete ◽  
L. D'Hendecourt ◽  
D. Défourneau ◽  
O. Dutuit ◽  
...  
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Extinction Curve ◽  
Interstellar Matter ◽  
Molecular Stability ◽  
Polycyclic Aromatic ◽  
Small Grains

The Polycyclic Aromatic Hydrocarbon (PAH) hypothesis states that a mixture of free PAH molecules is an ubiquitous and abundant component of the interstellar matter. It has been first formulated by Léger and Puget (1984) on the basis of molecular stability that made PAHs good candidates for the very small grains proposed by Sellgren (1984). Then, they obtained strong, although not final, support from spectroscopy.

Small Grains and Large Aromatic Molecules

1991 ◽  
pp. 211-225 ◽  
Author(s):  
A. Léger ◽  
L. D’Hendecourt ◽  
L. Verstraete ◽  
P. Ehrenfreund
Keyword(s):  
Aromatic Molecules ◽  
Small Grains

The Jovian ring

1984 ◽  
Vol 75 ◽  
pp. 203-209
Author(s):  
Joseph A. Burns
Keyword(s):  
Equatorial Plane ◽  
Charged Particles ◽  
Dynamical Evolution ◽  
Main Band ◽  
Small Grains ◽  
Three Components

ABSTRACTLying in Jupiter's equatorial plane is a diaphanous ring having little substructure within its three components (main band, faint disk, and halo). Micron-sized grains account for much of the visible ring, but particles of centimeter sizes and larger must also be present to absorb charged particles. Since dynamical evolution times and survival life times are quite short (≲102-3yr) for small grains, the Jovian ring is being continually replenished; probably most of the visible ring is generated by micrometeoroids colliding into unseen parent bodies that reside in the main band.

Weed Management in Small Grains Harvested for Grain

EDIS ◽  
2020 ◽  
Vol 2020 (3) ◽  
Author(s):  
Jason Ferrell ◽  
Gregory MacDonald ◽  
Pratap Devkota
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Chemical Control ◽  
Management Practices ◽  
Good Management ◽  
Small Grains ◽  
Crop Competition

Successful weed control in small grains involves using good management practices in all phases of production. In Florida, winter weeds compete with small grains for moisture, nutrients, and light, with the greatest amount of competition occurring during the first six to eight weeks after planting. Weeds also cause harvest problems the following spring when the small grain is mature. This 4-page publication discusses crop competition, knowing your weeds, and chemical control. Written by J. A. Ferrell, G. E. MacDonald, and P. Devkota, and published by the UF/IFAS Agronomy Department, revised May 2020.

DETERMINATION OF QUALITY OF SURFACE IN HOME CONDITIONS

2020 ◽  
Vol 36 (2) ◽  
pp. 93-101
Author(s):  
G.A. Irgalina ◽  
Keyword(s):  
Chemical Reaction ◽  
Regulatory Document ◽  
Organoleptic Evaluation ◽  
Organoleptic Characteristics ◽  
Small Grains ◽  
Sour Cream ◽  
Taste And Smell ◽  
Home Conditions

The article reflects the assessment of the quality of sour cream at home, and considers methods for determining the quality of sour cream. Organoleptic evaluation was performed for compliance with the requirements of GOST 52092-2003 " Smetana. Technical conditions " in terms of appearance, consistency, color, taste and smell. The consistency of sour cream is determined during its mixing, while evaluating the presence of a glossy appearance of sour cream. Sour cream is considered thick if it slowly drains from the whorl. The smell is determined immediately after mixing. Then we evaluate the taste. When evaluating the quality of the samples under study, it was found that the organoleptic characteristics of the samples fully comply with the requirements of the regulatory document. Analyzing the results of the experiment, we can conclude that in the first experiment, the sour cream purchased on the market was completely dissolved, and the sour cream from the store after dissolution showed small grains. And in the second experiment, the results showed that the color did not change in the sample # 2, but under # 1 it turned blue. The basis of this experiment is a qualitative chemical reaction to starch, which is used as a thickener.

Intervarietal Competition among Small Grains 1

1927 ◽  
Vol 19 (11) ◽  
pp. 971-983 ◽  
Author(s):  
G. H. StringField
Keyword(s):  
Small Grains
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