✦ LIBER ✦

Mechanical properties of poly(glutamic acid) in aqueous solution

✍ Scribed by Akira Konno; Motozo Kaneko

Publisher: Wiley (John Wiley & Sons)
Year: 1969
Tongue: English
Weight: 329 KB
Volume: 7
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.1969.360070404

No coin nor oath required. For personal study only.

✦ Synopsis

The interaction between ionizable carboxyl groups and the conformation of poly-(glutamic acid) (PGA) in aqueous solution were investigated by the mechanical method. The dynamic rigidity of the PGA solution has a maximum value at the pH corresponding to about 50% neutralization point. This may be due to establishing of a maximum attractive force by proton/charge fluctuation between ionizable carboxyl groups a t that pH. The dynamic viscosity has a sharp change in the region of pH 5.5-6.5. It is suggested that this behavior is due to the helix-coil transition.

📜 SIMILAR VOLUMES

Nature of Cu(II)-poly(glutamic acid) com

Nature of Cu(II)-poly(glutamic acid) complex in aqueous solution

✍ Hiroko Takesada; Hideo Yamazaki; Akiyoshi Wada 📂 Article 📅 1966 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 460 KB

Complex formation of poly(g1utamic acid) with cupric ions in aqueous solution was investigated by three different methods: optical spectroscopy, optical rotatory dispersion, and electron spin resonance. Formation of a characteristic complex wm found to occur in a p H region suitable for the helix-co

Nature of Cu(II)-poly(glutamic acid) com

Nature of Cu(II)-poly(glutamic acid) complex in aqueous solution

✍ Hiroko Takesada; Hideo Yamazaki; Akiyoshi Wada 📂 Article 📅 1967 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 45 KB

On page 717, line 3 in the figure caption of Figure 3 should read: PGA solution; On page 719, line 5 should read "the sites" rather thaii "three sites.

Mark–Houwink Parameters of Biosynthetic

Mark–Houwink Parameters of Biosynthetic Poly(γ-glutamic acid) in Aqueous Solution

✍ Isabel Irurzun; Jordi J. Bou; Graciela Pérez-Camero; Concepción Abad; Agustín Ca 📂 Article 📅 2001 🏛 John Wiley and Sons 🌐 English ⚖ 104 KB

Covalent modification in aqueous solutio

Covalent modification in aqueous solution of poly-γ-D-glutamic acid from bacillus licheniformis

✍ Elizabeth C. King; William J. Watkins; A. John Blacker; Timothy D. H. Bugg 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 119 KB

Methods for the covalent modification in aqueous solution of poly-␥-Dglutamic acid from Bacillus licheniformis have been studied. Co-derivatization of a synthetic UV-absorbent amine and ethanolamine, using a water-soluble carbodi-imide coupling agent, yielded a water-soluble modified polymer. Deriva

Pseudo-phase diagrams of poly-L-lysine a

Pseudo-phase diagrams of poly-L-lysine and poly(L-glutamic acid) in aqueous salt solutions

✍ D. Puett; A. Ciferri 📂 Article 📅 1968 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 205 KB 👁 1 views

Stability of DL-poly(lactic acid) in aqu

Stability of DL-poly(lactic acid) in aqueous solutions

✍ C. S. Proikakis; N. J. Mamouzelos; P. A. Tarantili; A. G. Andreopoulos 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 117 KB 👁 2 views

## Abstract DL‐poly(lactic acid) of molecular weight about 2500 was prepared by polycondensation of lactic acid and characterized by viscosimetry, infrared spectroscopy, light scattering, GPC, and NMR. Tablets made of the above polymer were immersed in buffer solutions at 37°C, and their swelling b