Introduction: Radio and IR studies of molecular clouds

2008 ◽  
pp. 1-12 ◽  
Author(s):  
Charles H. Townes
Keyword(s):  
Molecular Clouds ◽  
Ir Studies

Structure of the turbulent atomic gas and formation of molecular clouds

2008 ◽  
Vol 31 ◽  
pp. 15-18
Author(s):  
P. Hennebelle ◽  
E. Audit
Keyword(s):  
Molecular Clouds ◽  
Atomic Gas

IR Studies of the Phase Transformation of Fe2O3 → Fe3O4by Magnetomechanical Activation

1997 ◽  
Vol 07 (C1) ◽  
pp. C1-615-C1-616 ◽  
Author(s):  
I. Jacyna-Onyszkiewicz ◽  
M. Grunwald-Wyspianska ◽  
W. A. Kaczmarek
Keyword(s):  
Phase Transformation ◽  
Ir Studies

Studies on the Preparation, Characterization and Solubility of -Cyclodextrin-Roxythromycin Inclusion Complexes

2009 ◽  
Vol 2 (2) ◽  
pp. 523-530
Author(s):  
D. Nagasamy Venkatesh ◽  
S. Karthick ◽  
M. Umesh ◽  
G. Vivek ◽  
R.M. Valliappan ◽  
...  
Keyword(s):  
Dissolution Rate ◽  
Inclusion Complexes ◽  
Phase Solubility ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Ir Studies ◽  
Poorly Soluble ◽  
Poorly Soluble Drug

Roxythromycin/ β-cyclodextrin (Roxy/ β-CD) dispersions were prepared with a view to study the influence of β-CD on the solubility and dissolution rate of this poorly soluble drug. Phase-solubility profile indicated that the solubility of roxythromycin was significantly increased in the presence of β-cyclodextrin and was classified as AL-type, indicating the 1:1 stoichiometric inclusion complexes. Physical characterization of the prepared systems was carried out by differential scanning calorimetry (DSC), X-ray diffraction studies (XRD) and IR studies. Solid state characterization of the drug β-CD binary system using XRD, FTIR and DSC revealed distinct loss of drug crystallinity in the formulation, ostensibly accounting for enhancement of dissolution rate.

Transport of Dust Grains in Turbulent Molecular Clouds

1998 ◽  
Vol 498 (2) ◽  
pp. 757-762 ◽  
Author(s):  
B. R. Ragot
Keyword(s):  
Molecular Clouds ◽  
Dust Grains

scholarly journals Molecules in the Magellanic Clouds

1991 ◽  
Vol 148 ◽  
pp. 415-420 ◽  
Author(s):  
R. S. Booth ◽  
Th. De Graauw
Keyword(s):  
High Resolution ◽  
Molecular Clouds ◽  
Short Review ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Giant Molecular Clouds ◽  
Interstellar Molecules ◽  
First Time ◽  
Excitation Conditions

In this short review we describe recent new observations of millimetre transitions of molecules in selected regions of the Magellanic Clouds. The observations were made using the Swedish-ESO Submillimetre Telescope, SEST, (Booth et al. 1989), the relatively high resolution of which facilitates, for the first time, observations of individual giant molecular clouds in the Magellanic Clouds. We have mapped the distribution of the emission from the two lowest rotational transitions of 12CO and 13CO and hence have derived excitation conditions for the molecule. In addition, we have observed several well-known interstellar molecules in the same regions, thus doubling the number of known molecules in the Large Magellanic Cloud (LMC). The fact that all the observations have been made under controlled conditions with the same telescope enables a reasonable intercomparison of the molecular column densities. In particular, we are able to observe the relative abundances among the different isotopically substituted species of CO.

Compact cores of molecular clouds in NGC 1333/IRAS 6–9

2000 ◽  
Vol 24 (4) ◽  
pp. 511-521
Author(s):  
Jin Sun ◽  
Jia-jian Shen ◽  
Yan-ping Zhang ◽  
Jin-jiang Sun
Keyword(s):  
Molecular Clouds
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