Combination of wool protein with weak acids

Steinhardt, Jacinto; Fugitt, Charles H.; Harris, Meyer M.

doi:10.6028/jres.030.011

Cited by 33 publications

(13 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In qualitative agreement with this, the acid-titration curve of wool keratin lies in a region of much lower pH than the corresponding curve for a protein such as egg albumin (Steinhardt & Harris 1940). I t should be noticed that the apparent increase in the acid strength of the carboxyl groups in a fibre is not attributed to the presence of positive groups in close proximity to each carboxyl group, but to the positive potential of the fibre as a whole.…”

Section: An Approximate Titration Equation Is Developed For the Reactsupporting

confidence: 68%

“…The extent of the cleavage between this theory, and the treatm ent put forward by Steinhardt & Harris (1940) is immediately to be seen from their assumption, which we quote, th at 'No recognition need be taken of differences in hydrogen-ion concentration inside and outside the fibre'. This may mean, they say, 'either th a t these concentrations are identical, or th at they are related to one another in a way which is practically independent of the presence of other ions'.…”

Section: R E L a T Io N T O O T H E R T H E O R I E S O F T It R A T mentioning

confidence: 83%

“…Titrations carried out at constant ionic strength by Steinhardt (1942) and by Steinhardt & Harris (1940) The influence of the intrinsic affinity of the anion of an acid on the position of the titration curve with respect to the pH axis, is shown clearly by equation (11). For example, if the chloride ion is replaced by an ion of greater affinity (less positive A fa) the whole curve is moved to regions of higher pH.…”

Section: -*mentioning

confidence: 99%

“…Recently, Steinhardt (1941Steinhardt ( ,1942 and Steinhardt & Harris (1940) have advanced very different ideas. It will be of help in presenting them if the physical meaning of the equations developed above is summarized.…”

Section: R E L a T Io N T O O T H E R T H E O R I E S O F T It R A T mentioning

confidence: 99%

“…A different kind of association within the fibre is possible, however, and is found when the anion of a weak acid is adsorbed. Superimposed on the normal adsorption of anions and protons, one then finds an amount of the undissociated acid adsorbed proportional to the concentration of the undissociated acid in the external solution (Steinhardt et al 1943). The dissociation constant of the adsorbed acid will not, of course, be the same as for the acid in aqueous solution.…”

Section: Whencementioning

confidence: 99%

See 4 more Smart Citations

The combination of fibrous proteins with acids

1944

Proc. R. Soc. Lond. A

View full text Add to dashboard Cite

An approximate titration equation is developed for the reaction between fibrous proteins and acids, in which account is taken of the valency and intrinsic affinities of the acid anions, and of the limited number of adsorption sites available for anions. The transition from soluble to fibrous proteins is traced in order to demonstrate that the main difference between the titration curves of the two types of protein arises from the difference in potential de veloped during the adsorption of protons.

show abstract

Section: An Approximate Titration Equation Is Developed For the Reactsupporting

confidence: 68%

Section: R E L a T Io N T O O T H E R T H E O R I E S O F T It R A T mentioning

confidence: 83%

Section: -*mentioning

confidence: 99%

Section: R E L a T Io N T O O T H E R T H E O R I E S O F T It R A T mentioning

confidence: 99%

Section: Whencementioning

confidence: 99%

See 3 more Smart Citations

The combination of fibrous proteins with acids

1944

Proc. R. Soc. Lond. A

View full text Add to dashboard Cite

show abstract

Dyeing Theory

Burkinshaw

2015

Physico‐chemical Aspects of Textile Coloration

View full text Add to dashboard Cite

Präparative und analytische Trennung organischer Verbindungen durch Chromatographie an Polyamid

Endres¹,

Hörmann²

1963

Angewandte Chemie

View full text Add to dashboard Cite

Polyamidgefüllte Säulen eignen sich zur Chromatographie zahlreicher organischer Verbindungen, besonders von Phenolen, Carbonsäuren und aromatischen Nitroverbindungen. Das Verfahren hat sich auch bei der präparativen Isolierung von Naturstoffen bewährt. Die Affinität von Phenolen zu den Polyamiden beruht auf der Bildung von Wasserstoffbrücken zu den Peptidbindungen des Polyamids, während die aromatischen Nitroverbindungen durch die freien Aminogruppen des Polymeren zurückgehalten werden. Chinone reagieren irreversibel mit den freien Aminogruppen des Polyamids. Von acetyliertem Polyamid werden Chinone nicht zurückgehalten, wohl aber die Phenole.

show abstract

Combination of wool protein with weak acids

Cited by 33 publications

References 7 publications

The combination of fibrous proteins with acids

The combination of fibrous proteins with acids

Dyeing Theory

Präparative und analytische Trennung organischer Verbindungen durch Chromatographie an Polyamid

Contact Info

Product

Resources

About