𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Dielectric behavior of DNA–Proflavine complex

✍ Scribed by D. N. Goswami; Jyotirmoy Das; N. N. Das Gupta

Publisher
Wiley (John Wiley & Sons)
Year
1973
Tongue
English
Weight
297 KB
Volume
12
Category
Article
ISSN
0006-3525

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

The dielectric relaxation of namtive DNA and DNA–proflavine complexes at different DNA phosphate (P) to dye (D) ratios, were investigated in the frequency range 100 c/sec to 100 Kc/sec. The proflavine molecules were found to have a profound effect on the static dielectric constant and the relaxation time of the polymers. The static dielectric constant was oberserved to decrese with increasing level of added proflavine. At P/D = 1, the variation of dielectric constant with frequency was small. Relaxation time (τ) was greater for the DNA–proflavine complexes compared to that for free DNA, Maximum value of the relaxation time was obtained at P/D = 10. The increase in the relaxation time and decrease in the static dielectric constant were attributed to the increase in length and meutralization of surface charges of the DNA molecules, respectively, as aresult of proflavine binding.

📜 SIMILAR VOLUMES

Dielectric behavior of DNA—dye complex—I
Dielectric behavior of DNA—dye complex—II
✍ D. N. Goswami; N. N. Das Gupta 📂 Article 📅 1974 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 483 KB 👁 1 views

## Abstract The dielectric relaxation of native DNA and the effect of aminoacridine dyes, such as acridine orange (AO), proflavine (PF), and ethidium bromide (EB) have been investigated at different molar DNA phosphate (P) to dye (D) ratios in the frequency range 100 Hz–100 kHz. The static dielectr

Dielectric relaxation of DNA solutions.
Dielectric relaxation of DNA solutions. II
✍ Masanori Sakamoto; Reinosuke Hayakawa; Yasaku Wada 📂 Article 📅 1978 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 271 KB 👁 1 views

## Abstract Real and imaganiry parts of complex dielectric constant of dilute solutions of DNA in 10^−3^__M__ NaCl with molecular weight ranging from 0.4 × 10^6^ to 4 × 10^6^ were measured at frequencies from 0.2 Hz to 30 kHz. Dielectric increments Δε were obtained from Cole‐Cole plots and relaxati

Dielectric behaviour of frozen DNA in so
Dielectric behaviour of frozen DNA in solution
✍ Camelia Gabriel; Edward Grant 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 103 KB 👁 1 views

In this article, measurements are reported on ice and frozen DNA solutions between 100 Hz-10 MHz. Pure ice is shown to exhibit single relaxation behaviour, which confirms previous work taken over a more restricted frequency range. The frozen DNA solution displays double-dispersion behaviour. One dis

Unusual behavior exhibited by multistran
Unusual behavior exhibited by multistranded guanine-rich DNA complexes
✍ Karen Poon; Robert B. Macgregor Jr. 📂 Article 📅 1998 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 137 KB

The structural properties of oligonucleotides containing two different types of Grich sequences at the 3-ends were compared. It is shown that oligonucleotides with uninterrupted runs of guanine residues at the 3 -end, e.g., d(T 15 G 12 ), form multistranded structures stabilized by guanine-guanine i