๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Ultrasonic absorption of DNA solutions: influence of pH

โœ Scribed by Jean Sturm; Jacques Lang; Raoul Zana

Publisher
Wiley (John Wiley & Sons)
Year
1971
Tongue
English
Weight
316 KB
Volume
10
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

โœฆ Synopsis

Recently one of us has shown that the ultrasonic absorption of DNA solutions goes through a well-defined maximum when the pH is changed.1 This maximum occurs, independently of the ultrasonic frequency, at pH = 11.9, that is, at a pH close to that which corresponds to the mid-point of the denaturation of the DNA molecule, as found by optical rotatory dispersion measurements' for instance. It was then suggested that this maximum might be associated with the perturbation by the sound wave of some equilibria between the native and denatured forms of the DNA molecule. Indeed, Schwarz's theory2 predicts such a behavior of t,he ultrasonic absorption when the molerules in solution undergo a conformal change induced for instance by a pH variation.

๐Ÿ“œ SIMILAR VOLUMES

Ultrasonic absorption in aqueous solutio
Ultrasonic absorption in aqueous solution of lysozyme
โœ Hiroshi Kanda; Nirio Ookubo; Haruhiko Nakajima; Yasuko Suzuki; Michio Minato; Ta ๐Ÿ“‚ Article ๐Ÿ“… 1976 ๐Ÿ› Wiley (John Wiley & Sons) ๐ŸŒ English โš– 49 KB ๐Ÿ‘ 1 views

Values of A V for carboxyl and amino groups in the Synopsis and Table I were erroneously given and should read 9.4 and 19.7 cm3/mole, respectively. Consequently, the statement on page 788 that the bV is considerably smaller than that for glycine should be deleted. The value of A V for carboxyl group

Microwave dielectric absorption of DNA i
Microwave dielectric absorption of DNA in aqueous solution
โœ Kenneth R. Foster; Maria A. Stuchly; Andrzej Kraszewski; Stanislaw S. Stuchly ๐Ÿ“‚ Article ๐Ÿ“… 1984 ๐Ÿ› Wiley (John Wiley & Sons) ๐ŸŒ English โš– 380 KB ๐Ÿ‘ 1 views

The dielectric properties of aqueous solutions of DNA were measured at frequencies ranging from 0.1 to 12 GHz. The results are analyzed using the Maxwell mixture theory and yield a value for the hydration of the DNA of about 0.4 g/g, which is in the range ohserved in other investigations. No evidenc