Polarization Capacity at Solid Electrodes and True Surface Area Values

1957 ◽  
Vol 104 (12) ◽  
pp. 704 ◽  
Author(s):  
Ralph J. Brodd ◽  
Norman Hackerman
Keyword(s):  
Surface Area ◽  
True Surface ◽  
Solid Electrodes ◽  
Polarization Capacity

scholarly journals Electrochemical oxidation of As(iii) on Pd immobilized Pt surface: kinetics and sensing performance

RSC Advances ◽  
2018 ◽  
Vol 8 (15) ◽  
pp. 8071-8079 ◽  
Author(s):  
Md. Mahbubul Alam ◽  
Md. A. Rashed ◽  
Md. Musfiqur Rahman ◽  
Mohammed M. Rahman ◽  
Yuki Nagao ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Surface Area ◽  
Electrochemical Oxidation ◽  
Acidic Medium ◽  
Oxidation Process ◽  
Sodium Dodecyl ◽  
Surface Kinetics ◽  
True Surface ◽  
Sds Surfactant ◽  
Sensing Performance

Amplification of true surface area can be improved when Pd particles are deposited on a substrate in the presence of sodium dodecyl sulfate (SDS) surfactant. In acidic medium, As(iii) undergoes a two-step oxidation process.

On the real surface area of smooth solid electrodes

1997 ◽  
Vol 42 (19) ◽  
pp. 2915-2918 ◽  
Author(s):  
Graz̊yna Jarzabek ◽  
Zofia Borkowska
Keyword(s):  
Surface Area ◽  
Real Surface ◽  
The Real ◽  
Solid Electrodes ◽  
Real Surface Area

A study of the fasting metabolism of various breeds of hog: III. Metabolism and surface area measurements.

1937 ◽  
Vol 27 (3) ◽  
pp. 317-331 ◽  
Author(s):  
Thomas Deighton
Keyword(s):  
Surface Area ◽  
Anterior Pituitary ◽  
Growth Curves ◽  
Individual Growth ◽  
Photographic Method ◽  
Thyroid Activity ◽  
True Surface ◽  
One Year ◽  
Effect Of Light

From metabolism experiments carried out on the pigs enumerated in the first paper of this series the following conclusions are drawn:(a) The metabolism in a state of inanition appears to be more a function of a power of the weight than of the true surface area as determined by the photographic method.(b) Hogs born in the summer and autumn of one year appear to show two maxima of metabolism; one almost immediately, as has been observed previously, and another during the following summer, provisionally ascribed to the effect of light on thyroid activity, produced by the intermediary action of the anterior pituitary.(c) Actual, and theoretically computed average growths are shown to agree remarkably well in the case of eleven of the pigs which were treated in an exactly similar manner. Individual growth curves showed no such agreement. This is considered to strengthen the evidence for the writer's previously stated view that nett energy is a statistical rather than a physiological constant.

scholarly journals The Thickness of Some Insect Epicuticular Wax Layers

1960 ◽  
Vol 37 (2) ◽  
pp. 316-329
Author(s):  
KENNETH H. LOCKEY
Keyword(s):  
Surface Area ◽  
Epicuticular Wax ◽  
Average Thickness ◽  
Projected Area ◽  
Average Value ◽  
True Surface ◽  
Absorption Area ◽  
Krypton Adsorption

1. The average thickness of the epicuticular wax layers on the wing membranes and elytra of a number of different insects has been measured by relating the volume of extracted wax to the area of cuticle over which it was spread. 2. The true surface area of the epicuticle was measured by krypton adsorption. 3. The ratio of absorption area to apparent projected area was found to be 1.6 for the wing membranes, and 6.7-8.2 for the elytra, with an average value of 4.1. 4. The wax layers were found to be remarkably similar in thickness on the wing membranes, ranging from 0.11 to 0.13 µ but to vary from 0.11 to 1.26 µ in the case of elytra, where the wax thickness appears to be related to extent of modification.

Preparation and characterisation of vanadium pentoxide supported rhodium catalyst

1988 ◽  
Vol 46 ◽  
pp. 946-947
Author(s):  
A. Legrouri
Keyword(s):  
Aqueous Solution ◽  
Thermal Decomposition ◽  
Physicochemical Properties ◽  
Surface Area ◽  
Vanadium Pentoxide ◽  
High Purity ◽  
Gas Adsorption ◽  
Rhodium Catalyst ◽  
Optical Methods ◽  
Reducible Oxides

The industrial importance of metal catalysts supported on reducible oxides has stimulated considerable interest during the last few years. This presentation reports on the study of the physicochemical properties of metallic rhodium supported on vanadium pentoxide (Rh/V2O5). Electron optical methods, in conjunction with other techniques, were used to characterise the catalyst before its use in the hydrogenolysis of butane; a reaction for which Rh metal is known to be among the most active catalysts.V2O5 powder was prepared by thermal decomposition of high purity ammonium metavanadate in air at 400 °C for 2 hours. Previous studies of the microstructure of this compound, by HREM, SEM and gas adsorption, showed it to be non— porous with a very low surface area of 6m2/g3. The metal loading of the catalyst used was lwt%Rh on V2Q5. It was prepared by wet impregnating the support with an aqueous solution of RhCI3.3H2O.

Cell morphology, volume, and surface area determinations from multilevel contouring within HVEM micrographs of serial sections and whole-cell mounts

1987 ◽  
Vol 45 ◽  
pp. 588-589
Author(s):  
M. Marko ◽  
A. Leith ◽  
D. Parsons
Keyword(s):  
Surface Area ◽  
Electron Micrographs ◽  
Cell Morphology ◽  
Individual Variation ◽  
Serial Section ◽  
Stereo Pair ◽  
Complex Structures ◽  
Serial Sections ◽  
Surface Areas ◽  
Computer Based

The use of serial sections and computer-based 3-D reconstruction techniques affords an opportunity not only to visualize the shape and distribution of the structures being studied, but also to determine their volumes and surface areas. Up until now, this has been done using serial ultrathin sections.The serial-section approach differs from the stereo logical methods of Weibel in that it is based on the Information from a set of single, complete cells (or organelles) rather than on a random 2-dimensional sampling of a population of cells. Because of this, it can more easily provide absolute values of volume and surface area, especially for highly-complex structures. It also allows study of individual variation among the cells, and study of structures which occur only infrequently.We have developed a system for 3-D reconstruction of objects from stereo-pair electron micrographs of thick specimens.

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