The Supercontraction of Keratin Fibers by Lithium Bromide

Brown, Anne; Beauregard, Lawrence G.

doi:10.1016/b978-0-12-395705-4.50011-9

Sulfur in Proteins 1959

DOI: 10.1016/b978-0-12-395705-4.50011-9

|View full text |Cite

The Supercontraction of Keratin Fibers by Lithium Bromide

Anne Brown¹,

Lawrence G. Beauregard²

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

1962

Publication Types

Select...

Article1

Relationship

Self Cite0

Independent1

Authors

Journals

Cited by 1 publication

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Urea‐induced contraction–relaxation of rat tail tendons

Elden

Cassac

1962

J. Polym. Sci.

View full text Add to dashboard Cite

A contraction and relaxation of rat tail tensons that can be induced by aqueous urea solutions is described in this report. Studies with 2–10M urea at pH 7.0 and 37°C. showed that the length–time curves could be divided into five periods: (1) lag period, (2) contraction, (3) point of maximum contraction, (4) relaxation, and finally (5) rupture. An empirical analysis of the rate showed that (dL/dt)c, the initial velocity of contraction. (dL/dt)r, the terminal velocity of relaxation, and dL/dt, the velocity at any time (t), could be related with a specific rate constant, Kcr, by log [dL/dt − (dL/dt)r] = log [(dL/dt)c − (dL/dt)r] − Kcrt. (dL/dt)c was related linearly (positive slope) with Kcr whereas (dL/dt)r was independent of (dL/dt)c and Kcr. The rate constant Kcr obeyed the usual Arrhenius temperature equation on the basis of linearity between log Kcr and 1/T. Dilute solutions (2M) required a long period (tB) before rupture occured and no change in length ΔLmax/L0 was observed. Concentrated solutions (10M) had much shorter tB and elevated ΔLmax/L0. At a fixed concentration of urea tB and ΔLmax/L0 were dependent upon tendon size (W0 = area × density). Induction of the contraction–relaxation process appears to be due to melting of crystalline regions in the collagenmucopolysaccharides structure of the tendon.

show abstract

Urea‐induced contraction–relaxation of rat tail tendons

Elden

Cassac

1962

J. Polym. Sci.

View full text Add to dashboard Cite

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

The Supercontraction of Keratin Fibers by Lithium Bromide

Cited by 1 publication

References 16 publications

Urea‐induced contraction–relaxation of rat tail tendons

Urea‐induced contraction–relaxation of rat tail tendons

Contact Info

Product

Resources

About