The effect of sodium, potassium and ammonium ions on the conformation of the dimeric quadruplex formed by the Oxytricha nova telomere repeat oligonucleotide d(G4T4G4)

P. Schultze; N. V. Hud; F. W. Smith; J. Feigon

doi:10.1093/nar/27.15.3018

The effect of sodium, potassium and ammonium ions on the conformation of the dimeric quadruplex formed by the Oxytricha nova telomere repeat oligonucleotide d(G4T4G4)

Nucleic Acids Research ◽

10.1093/nar/27.15.3018 ◽

1999 ◽

Vol 27 (15) ◽

pp. 3018-3028 ◽

Cited By ~ 141

Author(s):

P. Schultze ◽

N. V. Hud ◽

F. W. Smith ◽

J. Feigon

Keyword(s):

Ammonium Ions ◽

Sodium Potassium ◽

Telomere Repeat ◽

Oxytricha Nova

The Influence of Sodium, Potassium, and Ammonium Ions on the Respiration of Azotobacter chroococcum as Related to the Composition of the Growth Medium

Soil Science Society of America Journal ◽

10.2136/sssaj1953.03615995001700030015x ◽

1953 ◽

Vol 17 (3) ◽

pp. 245-246 ◽

Cited By ~ 2

Author(s):

C. M. Burns ◽

John O. Harris

Keyword(s):

Growth Medium ◽

Azotobacter Chroococcum ◽

Ammonium Ions ◽

Sodium Potassium

Simultaneous Determination of Sodium, Potassium, and Ammonium Ions by Automated Direct Potentiometry

Analytical Letters ◽

10.1080/00032717408058778 ◽

1974 ◽

Vol 7 (7) ◽

pp. 463-472 ◽

Cited By ~ 21

Author(s):

Ivan Sekerka ◽

Joseph F. Lechner

Keyword(s):

Simultaneous Determination ◽

Ammonium Ions ◽

Sodium Potassium ◽

Direct Potentiometry

A Precise Calorimetric Study of 18-Crown-6 Complexes with Sodium, Potassium, Rubidium, Caesium, and Ammonium Ions in Aqueous Solution

Bulletin of the Chemical Society of Japan ◽

10.1246/bcsj.65.1173 ◽

1992 ◽

Vol 65 (4) ◽

pp. 1173-1175 ◽

Cited By ~ 26

Author(s):

Kazuhiko Ozutsumi ◽

Shin-ichi Ishiguro

Keyword(s):

Aqueous Solution ◽

Calorimetric Study ◽

Ammonium Ions ◽

Sodium Potassium

Binding sites and dynamics of ammonium ions in a telomere repeat DNA quadruplex 1 1Edited by I. Tinoco

Journal of Molecular Biology ◽

10.1006/jmbi.1998.2327 ◽

1999 ◽

Vol 285 (1) ◽

pp. 233-243 ◽

Cited By ~ 109

Author(s):

Nicholas V Hud ◽

Peter Schultze ◽

Vladimı́r Sklenář ◽

Juli Feigon

Keyword(s):

Binding Sites ◽

Ammonium Ions ◽

Telomere Repeat ◽

Repeat Dna ◽

Dna Quadruplex

Thermodynamics of complexation of sodium, potassium, rubidium, caesium and ammonium ions with 18-crown-6 in acetonitrile and propylene carbonate

Journal of the Chemical Society Faraday Transactions ◽

10.1039/ft9959104375 ◽

1995 ◽

Vol 91 (24) ◽

pp. 4375 ◽

Cited By ~ 13

Author(s):

Kumiko Ohtsu ◽

Takuji Kawashima ◽

Kazuhiko Ozutsumi

Keyword(s):

Propylene Carbonate ◽

Ammonium Ions ◽

Sodium Potassium ◽

Thermodynamics Of Complexation

ChemInform Abstract: SELECTIVITY OF CRYSTALLINE(IV) CERIUM PHOSPHATE SULFATE HYDRATES FOR LITHIUM(+), SODIUM(+), POTASSIUM(+), RUBIDIUM(+), CESIUM(+) AND AMMONIUM(+) IONS IN AQUEOUS MEDIUM

Chemischer Informationsdienst ◽

10.1002/chin.197847020 ◽

1978 ◽

Vol 9 (47) ◽

Author(s):

K.-H. KOENIG ◽

L. PSOTTA

Keyword(s):

Aqueous Medium ◽

Ammonium Ions ◽

Sodium Potassium ◽

Cerium Phosphate

EFFECTS OF AMMONIUM IONS ON SPONTANEOUS ACTION POTENTIALS AND ON CONTENTS OF SODIUM, POTASSIUM, AMMONIUM AND CHLORIDE IONS IN BRAIN IN VITRO

Journal of Neurochemistry ◽

10.1111/j.1471-4159.1978.tb07044.x ◽

1978 ◽

Vol 30 (1) ◽

pp. 131-143 ◽

Cited By ~ 51

Author(s):

A. M. Benjamin ◽

K. Okamoto ◽

J. H. Quastel

Keyword(s):

Action Potentials ◽

Chloride Ions ◽

Ammonium Ions ◽

Sodium Potassium ◽

Spontaneous Action ◽

Spontaneous Action Potentials

Glass electrode response to lithium ion activity. Effects of sodium, potassium, ammonium, tetramethyl-, tetraethyl-, and tetra-n-butyl ammonium ions in water and 50% water-ethanol mixture

Electrochimica Acta ◽

10.1016/0013-4686(77)87005-9 ◽

1977 ◽

Vol 22 (11) ◽

pp. 1255-1257 ◽

Cited By ~ 1

Author(s):

L.M. Mukherjee

Keyword(s):

Lithium Ion ◽

Glass Electrode ◽

Ammonium Ions ◽

Sodium Potassium ◽

Ethanol Mixture ◽

Electrode Response ◽

Ion Activity

Thermodynamics of complexation of 18-crown-6 with sodium, potassium, rubidium, caesium and ammonium ions in N,N-dimethylformamide

Journal of the Chemical Society Faraday Transactions ◽

10.1039/ft9949000127 ◽

1994 ◽

Vol 90 (1) ◽

pp. 127 ◽

Cited By ~ 14

Author(s):

Kazuhiko Ozutsumi ◽

Kumiko Ohtsu ◽

Takuji Kawashima

Keyword(s):

Ammonium Ions ◽

Sodium Potassium ◽

Thermodynamics Of Complexation

Morphology of Poly Amide Nanocomposites Characterized by Transmission Electron Microscopy (TEM) and Electron Spectroscopic Imaging (ESI).

Microscopy and Microanalysis ◽

10.1017/s1431927600028580 ◽

2001 ◽

Vol 7 (S2) ◽

pp. 502-503

Author(s):

W. Heckmann ◽

F. Ramsteiner ◽

Ch. Mehler

Keyword(s):

Building Blocks ◽

Layered Silicates ◽

Ammonium Ions ◽

Melt Mixing ◽

Sodium Potassium ◽

Modified Montmorillonite ◽

Transmission Electron ◽

Organically Modified ◽

Alkyl Ammonium ◽

Potassium Magnesium

The introduction of organophilic layered silicates into a polyamide matrix significantly improves stiffness and strength [1,2]. Two methods are known to prepare such nanocomposites. For both methods cations such as sodium, potassium, magnesium or calcium, located in the interlayer galleries of the layered silicates must be exchanged by quaternary alkyl ammonium ions containing at least one alkyl chain and so rendering the originally hydrophilic into an organophilic silicate. in the insitu-method monomeric caprolactam is intercalated between the modified silicate interlayers and subsequently polycondensated to polyamide. By this method the silicates can be broken down into their nanoscale building blocks as can be shown by TEM and ESI (Fig. 1). Another more direct possibility to delaminate the silicates is melt mixing in an extruder. with both methods similar degrees of delamination can be achieved.This paper presents some of our morphological results on polyamide containing organically modified montmorillonite.