356 Result(s)

Article

Atomic Bose-Einstein Condensates: A Model for Macroscopic Quantum Systems

A novel type of macroscopic quantum system has recently become available through the experimental realization of Bose condensates from neutral atoms. We review experimental results and the elementary quantum m...

D. Meschede, V. Gomer, H. Monien in Naturwissenschaften (1998)

Article

Interplane relaxation and the bilayer coupling in Y₂Ba₄Cu₇O₁₅

The origin of the spin gap in the underdoped cuprate superconductors is still mysterious. Experimental evidence from neutron scattering and NMR experiments indicates that the spin gap might be present only in .....

H. Monien, A. W. Sandvik in Journal of Low Temperature Physics (1995)

Article

Ionen-chromatographische Bestimmung von Chlorid in Zement

The concentration of chloride in cement samples can be determined by ion-chromatography after digestion of the material with nitric acid. For the elimination of interfering nitrate and other matrix components ...

J. Bruins, B. Hillebrecht, H. Monien… in Fresenius' Zeitschrift für analytische Che… (1988)

Article

Ultrasound attenuation peaks due to order parameter collective modes in impure superconductors with strong electron-hole asymmetry

First we develop the general theory of order parameter collective modes and their sound attenuation in dirty superconductors with even-parity pairing. For the BCS state the theory yields a peak in the attenuat...

St. Lenck, H. Monien, L. Tewordt in Journal of Low Temperature Physics (1988)

Article

Effects of spin-orbit interaction and crystal fields on superconductingp-wave pair states and their collective excitations in cubic systems

Superconducting pair states for systems with strong spin-orbit interaction and crystallographic anisotropy are usually assumed to transform as the basis functions of the irreducible representations Γ _...

H. Monien, K. Scharnberg, L. Tewordt, N. Schopohl in Journal of Low Temperature Physics (1986)

Article

Theory of Josephson flow oscillations in superfluid³He-B

Avenel and Varoquaux have proposed an experiment for observing pressure-induced Josephson flow oscillations across an orifice connecting two reservoirs of³He-B. The aim of the present work is to specify the condi...

H. Monien, L. Tewordt in Journal of Low Temperature Physics (1986)

Article

Liquid column-chromatographic separation and determination of long-chain primary n-alkylamines (n-C₁₀H₂₁NH₂ to n-C₂₂H₄₅NH₂) after their fluorescence derivatization with salicylaldehyde diphenylboron chelate

Langkettige primäre n-Alkylamine (Fettamine) wurden nach der Derivatisierung mit Salicyl-aldehyd-diphenylborchelat zu fluorescierenden chelatartigen Azomethinverbindungen mit Hilfe der „reversed-phase”-Hochlei...

K. E. Claas, E. Hohaus, H. Monien in Fresenius' Zeitschrift für analytische Chemie (1986)

Article

Buchbesprechungen

K. v. Meyenn, P. Fischer, L. Jaenicke, H. Monien in Naturwissenschaften (1985)

Article

Longitudinal magnetic resonance (NMR) in the A₁ phase of superfluid³He

The Ginzburg-Landau theory is used to calculate the distortion of the conventional A ₁ - and A ₂ -phase order parameterA _µi arising from the di...

H. Monien, L. Tewordt in Journal of Low Temperature Physics (1985)

Article

Hochdruckflüssigkeits-chromatographische Trennung und fluorimetrische Bestimmung primärer α,ω-Diamine nach der Derivatisierung zu α,ω-Bis(2,2-diphenyl-1-oxa-3-azonia-2-borata-3-naphthyl)alkanen

The separation of 1,2-diaminoethane and the following homologues including 1,6-diaminohexane was carried out after their derivatization to fluorescent bis(diphenylboron) chelates of the α,ω-bis(salicylideneamino)...

K. E. Claas, E. Hohaus, H. Monien in Fresenius' Zeitschrift für analytische Chemie (1983)

Article

Erfahrungen zur Bestimmung von Vanadium mittels Atomabsorptions-Spektrometrie in Kohleöfen nach der Extraktion aus Meerwasser

For the determination of vanadium in sea water 4-(2-pyridylazo)resorcinol (PAR) in the presence of tetraphenylarsonium chloride (TPAC) and tetramethylene dithiocarbamate (TMDTC) were selected out of several ch...

H. Monien, R. Stangel in Fresenius' Zeitschrift für analytische Chemie (1982)

Article

Zur Invers-Voltammetrie einiger Kupferchelate an der Kohlepaste-Elektrode. Bestimmung von Kupfer in Trinkwasser durch Oxidation von Kupferdithiooxamid

Dithio-oxamide, 2,2′-bichinoline, neocuproine and bathocuproine can be oxidized at the carbon paste electrode as well as the corresponding copper chelates. Particularly, dithio-oxamide is a convenient reagent ...

H. Monien, Ute Gerlach, P. Jacob in Fresenius' Zeitschrift für analytische Chemie (1981)

Article

Zur Bestimmung von Molybdän in Meerwasser mit verschiedenen Methoden

For the determination of molybdenum in sea water three methods are applied: Inverse voltammetry, atomic absorption (AAS), and X-ray fluorescence (XFS). Only the inverse voltammetric determination requires no a...

H. Monien, R. Bovenkerk, K. P. Kringe… in Fresenius' Zeitschrift für analytische Che… (1980)

Article

Das voltammetrische Verhalten von Natrium-diethyldithiocarbamat an der Kohlepaste-Elektrode

The electrochemical behaviour of sodium diethyldithiocarbamate at the carbon paste electrode has been investigated using a base electrolyte containing acetate buffer (pH 4.8). The comparison of the cyclic-, di...

H. Monien, Renate Bovenkerk in Fresenius' Zeitschrift für analytische Chemie (1980)

Article

Untersuchungen zur voltammetrischen Bestimmung von Molybdän in Gegenwart von Wolfram

The complex compound of molybdenum with sodium diethyldithiocarbamidate is reducible at the carbon paste electrode in a base electrolyte containing acetate buffer. The height of the reduction peak with the pea...

H. Monien, P. Jacob, B. Jänisch in Fresenius' Zeitschrift für analytische Chemie (1973)

Article

Allgemeine analytische methoden, apparate und reagentien

S. Elias, H. Monien, J. Rasch, W. Dedek… in Fresenius' Zeitschrift für analytische Che… (1972)

Article

4. Biologisches Material

A. E. Bühler, S. Elias, W. Dedek, A. Niemann… in Fresenius' Zeitschrift für analytische Che… (1972)

Article

Voltammetrische Bestimmung kleiner Eisenmengen ohne Abtrennung der Matrix

Iron in concentrated hydrochloric acid as well as in many other chloride solutions can be determined directly by use of a carbon paste electrode in the concentration range from 10⁻³ to 10⁻⁶%. At the limits of the...

H. Monien, P. Jacob in Fresenius' Zeitschrift für analytische Chemie (1972)

Article

Eine rotierende Kohlepaste-Elektrode zur inversen Voltammetrie im Picogrammbereich

H. Monien, P. Jacob in Fresenius' Zeitschrift für analytische Chemie (1971)

Article

Referate

H. Pohl, B. Tvaroha, A. Schmidt, H. Schwarz… in Fresenius' Zeitschrift für analytische Che… (1971)