The C-12 Position of the Carbonyl Group in Hecogenin

Preparation and Surface Area Measurements of Platinized-Platinum Electrodes

“…This paper was presented at the Boston Meeting, Sept. [16][17][18][19][20]1962. Any discussion of this paper will appear in a Discussion Section to be published in the June 1965 JOURNAL.…”

“…The method of Bowden-Rideal (16) as modified by Wagner (17) and Pegues (18) served as the basis for some limited experiments in the rise of polarization capacity as a means of surface area measurement. The method is based on the principle that the surface area of an electrode is related to the rate of change of cathodic potential and constant current.…”

Atomic Diffusion in Tetrahedral Semiconductors. Approximative Treatment of Diffusion Theories

“…By means of a zero-finding algorithm the value of qo may be determined such that the solution passes through a point with'q = 0, y = yo. Wagner [15] was able t o circumvent this shooting due to C,, = N = 0 in his case.…”

Notes

“…Experimental Substituted Ethylenediamines.-The anhydrous N-alkylethylenediamines were obtained from Mr. R. Kent Murmann. 9 The dihydrochlorides of isobutylenediamine and tetramethylethylenediamine were furnished by Dr. Yun-Ti Chen and R. Kent Murmann, respectively. These hydrochlorides were converted to the free amine by the treatment of concentrated aqueous solutions of the salt with an excess of solid sodium hydroxide.…”

“…Other lots of the orange reagent varied between ICli.t and ICli.i. (9) Fritz Ephraim, "Inorganic Chemistry/' 5th English edition by P. C. L. Thorne and E. R. Roberts, Gurney and Jackson, London, 1948, p. 254.…”