scholarly journals Dissolution behavior of solid drugs. V. Determination of the transition temperature and heat of transition between barbital polymorphs by initial dissolution rate measurements.

1975 ◽  
Vol 23 (6) ◽  
pp. 1347-1352 ◽  
Author(s):  
KEIJI SEKIGUCHI ◽  
MOTOKO KANKE ◽  
NORIKO NAKAMURA ◽  
YASUYUKI TSUDA
Keyword(s):  
Transition Temperature ◽  
Dissolution Rate ◽  
Dissolution Behavior ◽  
Heat Of Transition ◽  
Initial Dissolution Rate

A SIMPLE QUALITATIVE DETERMINATION OF JOSEPHSON TUNNEL JUNCTION PARAMETERS NEAR THE TRANSITION TEMPERATURE

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1232-C6-1233 ◽  
Author(s):  
N. F. Pedersen ◽  
J. Mygind ◽  
O. H. Soerensen ◽  
B. Dueholm
Keyword(s):  
Transition Temperature ◽  
Tunnel Junction ◽  
Josephson Tunnel ◽  
Qualitative Determination

The reductive dissolution of synthetic goethite and hematite in dithionite

Clay Minerals ◽  
1987 ◽  
Vol 22 (3) ◽  
pp. 329-337 ◽  
Author(s):  
J. Torrent ◽  
U. Schwertmann ◽  
V. Barron
Keyword(s):  
Specific Surface ◽  
Dissolution Rate ◽  
Surface Area ◽  
Reductive Dissolution ◽  
Natural Environments ◽  
Dissolution Rates ◽  
Aluminium Substitution ◽  
Initial Dissolution Rate

AbstractThe reductive dissolution by Na-dithionite of 28 synthetic goethites and 26 hematites having widely different crystal morphologies, specific surfaces and aluminium substitution levels has been investigated. For both minerals the initial dissolution rate per unit of surface area decreased with aluminium substitution. At similar aluminium substitution and specific surface, goethites and hematites showed similar dissolution rates. These results suggest that preferential, reductive dissolution of hematite in some natural environments, such as soils or sediments, might be due to the generally lower aluminium substitution of this mineral compared to goethite.

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