Structure Determination of Formic Acid Reaction Products on TiO2(110)†

2004 ◽  
Vol 108 (38) ◽  
pp. 14316-14323 ◽  
Author(s):  
D. I. Sayago ◽  
M. Polcik ◽  
R. Lindsay ◽  
R. L. Toomes ◽  
J. T. Hoeft ◽  
...  
Keyword(s):  
Formic Acid ◽  
Structure Determination ◽  
Reaction Products ◽  
Acid Reaction

Vibration-spectral studies of compounds formed by the combination of methylformamide and dimethylformamide with some strong acids

1966 ◽  
Vol 19 (11) ◽  
pp. 2091 ◽  
Author(s):  
E Spinner
Keyword(s):  
Hydrochloric Acid ◽  
Sulphuric Acid ◽  
Infrared Spectra ◽  
Spectral Studies ◽  
Ionic Form ◽  
Reaction Products ◽  
Unknown Structure ◽  
Acid Reaction ◽  
Strong Acids

A determination of the infrared spectra of the solid hydrochlorides of methylformamide and dimethylformamide and of the Raman spectra of their aqueous solutions showed that certain spectral features change with the medium used. The infrared spectra of the two amides in concentrated and in aqueous sulphuric acid, and in concentrated hydrochloric acid (HCl and DCl), are consistent with the existence of two amide/acid reaction products for each amide: one (certainly ionic) form predominates in sulphuric acid solutions; a second form, of unknown structure, is present in the solid hydrochlorides, and in hydrochloric acid the two forms coexist in equilibrium.

scholarly journals Quantitative structure determination of adsorbed formate and surface hydroxyls on Fe3O4(001)

2022 ◽  
Author(s):  
P. T. P. Ryan ◽  
D. J. Payne ◽  
T.-L. Lee ◽  
D. A. Duncan
Keyword(s):  
Formic Acid ◽  
Quantitative Determination ◽  
Structure Determination ◽  
Adsorption Site ◽  
Quantitative Structure ◽  
Surface Hydroxyls

Quantitative determination of the adsorption site of hydroxyl and formate species formed during the adsorption of formic acid on Fe3O4(001).

THE DETERMINATION OF TRYPTOPHANE BY A MODIFIED GLYOXYLIC ACID METHOD EMPLOYING PHOTOELECTRIC COLORIMETRY

1938 ◽  
Vol 16b (10) ◽  
pp. 361-368 ◽  
Author(s):  
J. L. D. Shaw ◽  
W. D. McFarlane
Keyword(s):  
Formic Acid ◽  
Sodium Hydroxide ◽  
Reliable Method ◽  
Glyoxylic Acid ◽  
Acid Method ◽  
Photoelectric Colorimeter ◽  
Acid Reaction ◽  
Alkali Hydrolysis ◽  
Hydrolysis Of

An accurate and reliable method for the estimation of tryptophane is described. It is based on the glyoxylic acid reaction, and involves the use of the Evelyn photoelectric colorimeter. The technique makes it possible to ascertain readily whether the color being measured is due only to tryptophane.The method has been applied to casein, of which, if necessary, only 25 mg. is required. The tryptophane determination is readily accomplished on a solution obtained by dissolving the casein in 10 or 20% sodium hydroxide or 5% formic acid by heating for a few minutes. With respect to alkali hydrolysis of casein under pressure, tryptophane is unstable in the sodium hydroxide hydrolysis, but is very stable in the baryta hydrolysis. The age and source of the casein are shown to be factors causing variations in the tryptophane content of different samples of casein, a variability which has been observed by a few previous workers.

Ab initio structure determination of cytochrome c6 by combined reciprocal space-real space approach

2003 ◽  
Vol 218 (1) ◽  
Author(s):  
K. Chowdhury ◽  
S. Ghosh ◽  
M. Mukherjee
Keyword(s):  
Cytochrome C ◽  
Ab Initio ◽  
Structure Determination ◽  
Direct Method ◽  
Real Space ◽  
Reciprocal Space ◽  
Cytochrome C6 ◽  
Ab Initio Structure ◽  
Space Approach

AbstractThe direct method program SAYTAN has been applied successfully to redetermine the structure of cytochrome c

STRUCTURE DETERMINATION OF 5 MEMBERED SILANE RINGS USING MICROWAVE SPECTROSCOPY

2018 ◽  
Author(s):  
Frank Marshall ◽  
G. Grubbs II ◽  
Gamil Guirgis ◽  
Theodore Carrigan-Broda ◽  
Grier Jones ◽  
...  
Keyword(s):  
Structure Determination ◽  
Microwave Spectroscopy
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