scholarly journals II. On the thermo-electric action of metals and liquid

1871 ◽  
Vol 19 (123-129) ◽  
pp. 324-345
Keyword(s):  
Chemical Change ◽  
Thermo Electric ◽  
Electrical State ◽  
Electric Action

It is well known that the degree of rapidity with which a metal immersed in an acid, alkaline, or saline liquid is corroded varies considerably with the temperature, and that the speed of corrosion usually increases with the heat; also a few experiments have been published (Gmelin’s 'Handbook of Chemistry,’ vol. i. p. 375 ) showing that changes of electrical state occur in metals under such circumstances; but a further examination of the relations of the temperature and chemical change to the electrical state has not, that I am aware, yet been made.

scholarly journals IV. Some relations of heat to voltaic and thermo-electric action of metals in electrolytes

1883 ◽  
Vol 36 (228-231) ◽  
pp. 50-55 ◽  
Keyword(s):  
Thermo Electric ◽  
Chemical Corrosion ◽  
Electric Action

The author states that the object of this research was “to ascertain the thermo-electric action of a series of metals in particular liquids, and to examine the relations of the thermo-electric to the chemico-electric behaviour of metals in electrolytes, and to ordinary chemical corrosion, and the source of the voltaic current.” With this object, the thermo-electric tension series, also the chemico-electric tension series, at 60° and 160° F. of thirteen metals in solutions of twenty-two different salts, alkalies, and acids, were experimentally found, and are shown in two tables. The same thermo- and chemico-electric series were also determined in solutions of different strengths of the same substances, and are also exhibited in two tables; and the effects of difference of strength of liquid upon the orders of those series are inferred from the results.

scholarly journals A TENTATIVE THEORY OF THERMO-ELECTRIC ACTION

Science ◽  
1905 ◽  
Vol 21 (525) ◽  
pp. 81-90
Author(s):  
E. H. Hall
Keyword(s):  
Thermo Electric ◽  
Electric Action

Optimization of Microcrystalline Cellulose PH 101, Lactose, and Kollidon® K 30 To Obtain Co-Processed Excipient Through Spray Drying

2017 ◽  
Vol 7 (2) ◽  
Author(s):  
Kusuma P. ◽  
Syukri Y ◽  
Sholehuddin F. ◽  
Fazzri N. ◽  
Romdhonah . ◽  
...  
Keyword(s):  
Spray Drying ◽  
Microcrystalline Cellulose ◽  
Chemical Change ◽  
Direct Compression ◽  
Flow Properties ◽  
Scanning Calorimetry ◽  
Compression Process ◽  
Infrared Spectrophotometer ◽  
Physical Mixtures ◽  
Spray Dried

The most efficient tablet processing method is direct compression. For this method, the filler-binder can be made by coprocessing via spray drying method. The purpose of this study was to investigate the effect of spray dried co-processing on microcrystalline cellulose (MCC) PH 101, lactose and Kollidon® K 30 as well as to define the optimum proportions. Spray dried MCC PH 101, lactose, and Kollidon® K 30 were varied in 13 different mixture design proportions to obtain compact, free-flowing filler-binder co-processed excipients (CPE). Compactibility and flow properties became the key parameters to determine the optimum proportions of CPE that would be compared to their physical mixtures. The result showed that the optimum proportion of CPE had better compactibility and flow properties than the physical mixtures. The optimum CPE, consisting of only MCC PH 101 and Kollidon® K 30 without lactose, that were characterized using infrared spectrophotometer, differential scanning calorimetry (DSC), X-ray diffraction (XRD), and scanning electron microscope (SEM) indicated no chemical change therein. Therefore, this study showed that spray dried MCC PH 101, lactose and Kollidon® K 30 could be one of the filler-binder alternatives for direct compression process.

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