𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Monolayer and Bilayer Vesicle Membranes fromp-Phenylenediamine Derivatives

✍ Scribed by Fuhrhop, Jürgen-Hinrich ;Bartsch, Herbert

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
818 KB
Volume
1983
Category
Article
ISSN
0947-3440

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Several water‐insoluble (pH 4 or 2) N,N‐dialkylated p‐phenylenediamine derivatives form bilayer membrane vesicles on sonication under nitrogen. Corresponding α,ω‐betaines give vesicles with monolayer membranes on sonication. In electron micrographs chain‐like aggregates are observed. – The free amino group on the outer surface of the phenylenediamine vesicles reacts selectively in an oxidative coupling reaction with phenol and acetanilide and pyrazolone derivatives as well as with nitrite ions. Vesicles with coloured outer surfaces (blue, red, and yellow) are obtained. The inner surface does not react. Small coupling reagent molecules react much faster with the vesicles than large ones. In ethanolic solution such differences are not observed.

📜 SIMILAR VOLUMES

Sealing and Opening Porous Monolayer Ves
Sealing and Opening Porous Monolayer Vesicle Membranes
✍ Prof. Dr. Jürgen-Hinrich Fuhrhop; Dipl.-Chem. Ulrich Liman; Dipl.-Chem. Hans Her 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 287 KB

In THF at room temperature, 1 reacts with less reactive dienophiles such as 7 -11 (Table 1) to give the cycloadducts 12[61 in high yield; intermediate radical ions are not detected. The adducts 12a -12d split off two equivalents of dimethylamine at 140-160°C under acid catalysis with formation of th

Interaction of polymyxin B1 and polymyxi
Interaction of polymyxin B1 and polymyxin B1 nonapeptide with phosphatidic acid monolayer and bilayer membranes
✍ Gerhard Beurer; Fred Warncke; Hans-Joachim Galla 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 698 KB

The interactions of the antibiotic polymyxin BI and its enzymatic cleavage product polymyxin B~ nonapeptide with phosphatidic acid monolayers and with bilayer membranes were investigated. Temperature-dependent pressure-arca analysis of the monolayer reveals a linear increase of the lipid mean molecu

Second derivative spectrophotometric det
Second derivative spectrophotometric determination of partition coefficients of chlorpromazine and promazine between lecithin bilayer vesicles and water
✍ Keisuke Kitamura; Noriyuki Imayoshi; Takashi Goto; Hiroto Shiro; Takako Mano; Yu 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 512 KB

Absorption spectra of chlorpromazine and promazine in the presence of lecithin (egg yolk) bilayer vesicles were measured against the reference solutions containing the same amount of lecithin vesicles alone and their second derivative spectra were obtained by the Savitzky-Golay method. The residual