bluuebunny/crossref_metadata_2025 huggingface dataset:
Optical absorption by quasiparticles in superconducting multilayers
Authors: Plehn H. , Kümmel R.
Published: September 2010

The absorption of photons by quasiparticles in the Bloch bands of multilayers, formed by alternating normal (N) and superconducting (S) regions, is computed for the vector of the oscillating electric field being perpendicular to the N‐S interfaces. The absorption spectrum extends down to frequencies below the gap of the S‐layers, and its structure results from the combined effects of Andreev scattering and conventional scattering at the N‐S interfaces. For not too different Fermi energies ϵFS and ϵFN in the S and N layers there is one prominent resonance peak. With increasing temperature low frequency absorption goes up. For ϵFS ≫ ϵFN, on the other hand, a sharp multipeak structure at low frequencies is found.
From sum rules to RPA: 3. Optical dipole response in metal clusters
Authors: Reinhard P.‐G. , Genzken O. , Brack M.
Published: September 2010

The properties of plasmon resonances in metal clusters are computed within the random phase approximation (RPA), starting from the Kohn‐Sham ground state within the jellium model. The paper aims at a systematic survey of the general trends with varying parameters such as electron number, angular momentum, Wigner‐Seitz radius etc. To this end we exploit the flexibility of a particular RPA scheme which allows to switch easily between different levels of approximation.
Critical dynamics and multifractal exponents at the Anderson transition in 3d disordered systems
Authors: Brandes T. , Huckestein B. , Schweitzer L.
Published: September 2010

We investigate the dynamics of electrons in the vicinity of the Anderson transition in d = 3 dimensions. Using the exact eigenstates from a numerical diagonalization, a number of quantities related to the critical behavior of the diffusion function are obtained. The relation η = d − D2 between the correlation dimension D2 of the multifractal eigenstates and the exponent η which enters into correlation functions is verified. Numerically, we have η ≈︁ 1.3. Implications of critical dynamics for experiments are predicted. We investigate the long‐time behavior of the motion of a wave packet. Furthermore, electron‐electron and electron‐phonon scattering rates are calculated. For the latter, we predict a change of the temperature dependence for low T due to η. The electron‐electron scattering rate is found to be linear in T and depends on the dimensionless conductance at the critical point.
Transport properties of quantum dots
Authors: Weinmann Dietmar , Häusler Wolfgang , Kramer Bernhard
Published: September 2010

Linear and nonlinear transport through a quantum dot that is weakly coupled to ideal quantum leads is investigated in the parameter regime where charging and geometrical quantization effects coexist. The exact eigenstates and spins of a finite number of correlated electrons confined within the dot are combined with a rate equation. The current is calculated in the regime of sequential tunneling. The analytic solution for an Anderson impurity is given. The phenomenological charging model is compared with the quantum mechanical model for interacting electrons. The current‐voltage characteristics show Coulomb blockade. The excited states lead to additional fine‐structure in the current voltage characteristics. Asymmetry in the coupling between the quantum dot and the leads causes asymmetry in the conductance peaks which is reversed with the bias voltage. The spin selection rules can cause a ‘spin blockade’ which decreases the current when certain excited states become involved in the transport. In two‐dimensional dots, peaks in the linear conductance can be suppressed at low temperatures, when the total spins of the corresponding ground states differ by more than 1/2. In a magnetic field, an electron number parity effect due to the different spins of the many‐electron ground states is predicted in addition to the vanishing of the spin blockade effect. All of the predicted features are consistent with recent experiments.
Die Gänsebachtalbrücke, eine integrale Talbrücke der DB AG auf der Neubaustrecke Erfurt‐Leipzig/Halle
Authors: Schenkel Marcus , Goldack Arndt , Schlaich Jörg , Kraft Stefan
Published: September 2010

Die Gänsebachtalbrücke auf der Neubaustrecke zwischen Erfurt und Leipzig/Halle, Teil des Verkehrsprojektes Deutsche Einheit Nr. 8.2, ist eine integrale, also lagerlose, Eisenbahnbrücke aus Spannbeton. Sie ist für den Hochgeschwindigkeitsverkehr mit Betriebsgeschwindigkeiten bis zu 300 km/h bestimmt. Die in der Realisierung befindliche Talbrücke basiert als alternativer Entwurf auf dem “Leitfaden: Gestalten von Eisenbahnbrücken” der DB AG. Die Gänsebachtalbrücke ist eine Rahmenbrücke, ein Spannbetonplattenbalken monolithisch auf kreisrunden Pfeilern. Am Beispiel der Gänsebachtalbrücke konnte gezeigt werden, dass die alternativen Entwürfe aus dem Leitfaden der DB AG hinsichtlich Tragfähigkeit, Gebrauchstauglichkeit und Verkehrssicherheit sowie Kosten mindestens gleichwertig und damit für den Hochgeschwindigkeitsverkehr geeignet sind. Das Abweichen von der Rahmenplanung und die integrale Bauweise erforderten eine Zustimmung im Einzelfall und damit zahlreiche weiterführende Untersuchungen, welche in diesem Aufsatz ausführlich dargestellt werden, wie die Untersuchung zum dynamischen Verhalten bei Zugüberfahrten und möglicher Resonanzerscheinungen. Mit diesem alternativen Entwurf kommt eine Talbrücke zur Ausführung, die robuster ist und sich besser in das flache Gänsebachtal einfügt als der Ausschreibungsentwurf der Rahmenplanung.

The Gänsebach Valley Bridge, an Integral Valley Bridge owned by the DB AG on the New Railway Erfurt‐Leipzig/Halle

The new railway between Erfurt and Leipzig/Halle, part of the transportation project “Deutsche Einheit No. 8.2”, crosses the Gänsebach valley via an intregal (i.e. no bearings) prestressed concrete bridge. The bridge is designed for high‐speed traffic of up to 300 km/h. The bridge, currently under construction, is based on an alternative design in accordance with the guideline “Design of Railway Bridges” (“Leitfaden: Gestalten von Eisenbahnbrücken”) of the Deutsche Bahn AG. The Gänsebach valley bridge is designed as a frame bridge, a monolithical prestressed concrete double T‐beam on circular columns. The example of the Gänsebach valley bridge proved that alternative designs following the DB AG guideline are to be regarded as at least equivalent with regard to load bearing capacity, serviceability and traffic safety as well as cost and therefore suitable for high‐speed traffic. The deviation from the original plan and the integral design required a separate approval and consequently various further tests, such as examining the dynamic behavior under train crossings and possible resonance vibrations. These tests will be described in detail in this paper. This alternative design will result in a bridge which is more robust and will fit in more harmoniously with the shallow valley of the Gänsebach than the original commissioned design would have.
Korrosionsprodukte und deren Volumenfaktor bei der Korrosion von Stahl in Beton
Authors: Raupach Michael , Weizhong Gan , Wei‐Liang Jin
Published: September 2010

Korrosion der Bewehrung ist eine der Hauptursachen für Schäden an Betonbauwerken. Das Volumen des Rostes ist i. d. R. um ein Vielfaches größer als das ursprüngliche Stahlvolumen, was zu Rissbildungen und Abplatzungen des Betons bis hin zum Verlust der Gebrauchstauglichkeit führen kann. Basierend auf gezielten Korrosionsuntersuchungen werden in diesem Beitrag die Hauptkomponenten der typischen Eisenoxide und ‐hydrate sowie deren Volumenfaktoren beschrieben, die als Basis für weiterführende Betrachtungen der Auswirkungen der Bewehrungskorrosion dienen sollen.

Corrosion Products and their Volume Factor Created by Corrosion of Steel in Concrete

Steel corrosion is one of the main reasons of degradation and damage of concrete structures. The volume of rust, resulting from steel corrosion, can be several times greater than the original steel volume which leads to cracking and spalling of the concrete and may finally end in the loss of structural functionality. Based on corrosion experiments on black steel, this article presents the major components of typical oxide layers and their volume expansion and thus forms a basis for further studies on corrosion of steel in concrete.
Der Eurocode 2 für Deutschland – Erläuterungen und Hintergründe
Authors: Fingerloos Frank
Published: September 2010

Der neue Eurocode 2: “Bemessung und Konstruktion von Stahlbeton‐ und Spannbetontragwerken – Teil 1‐1: Allgemeine Bemessungsregeln und Regeln für den Hochbau” (EC2‐1‐1) mit seinem Nationalen Anhang ist nach einer ausführlichen Erprobungsphase bereit zur bauaufsichtlichen Einführung in Deutschland. In mehreren Beiträgen sollen Erläuterungen und Hintergründe zu einigen Regelungen im Eurocode 2 und zu den Entscheidungen für Regeln im Nationalen Anhang vorgestellt werden, die entweder zu Änderungen gegenüber DIN 1045‐1 oder zu Abweichungen vom Eurocode 2 führten. Der Teil 4 enthält einige Erläuterungen zu den Bewehrungs‐ und Konstruktionsregeln.

The Eurocode 2 for Germany – Explanations and Backgrounds Part 4: Detailing of Reinforcement and Members

The new Eurocode 2 “Design of concrete structures – Part 1‐1: General rules and rules for buildings” (EC2‐1‐1) and its National Annex has undergone a phase of detailed testing and is now ready for the implementation in Germany. In some articles should be given explanations and backgrounds of some rules in Eurocode 2 and of decisions for rules in the National Annex, which have been taken either to changes compared with DIN 1045‐1 or to differences to Eurocode 2. Article 4 contains some explanations to detailing of reinforcement and members.
Nachträgliche Abdichtung von Betonbauwerken durch Gelinjektionen
Authors: Rudolph Matthias , Hornig Ute
Published: September 2010

Der Beitrag beschäftigt sich mit den Möglichkeiten, Betonbauwerke mit anderen als den in der Instandsetzungsrichtlinie des DAfStb aufgeführten Produkten abzudichten. Dafür kommen Injektionsgele in Frage, die eine Reihe vorteilhafter Eigenschaften besitzen, durch die eine erfolgreiche Abdichtung auch dann noch möglich ist, wenn die “klassischen” Verfahren zu scheitern drohen. Wesentliche Vertreter der Injektionsgele, für die eine Reihe von praktischen Erfahrungen und Forschungsergebnissen vorliegen, sind die Acrylatgele, deren Anwendung beschrieben werden.

Ausgehend von beispielhaft genannten Randbedingungen und einer Darstellung der wesentlichen Materialeigenschaften werden die Arten der mit Gelinjektionen herstellbaren Abdichtungen (Gelschleierabdichtungen, Injektion in das Bauteil, in Bauteilzwischenräume und in Risse, sowie deren Mischformen) dargestellt.

Der Schwerpunkt liegt auf der Schleierinjektion, da sie die größten Besonderheiten gegenüber den üblichen Injektionen zum Füllen von Rissen und Fehlstellen aufweist. Für die Schleierinjektionen werden Grenzen der Ausführbarkeit und Möglichkeiten zum Erkennen dieser Grenzen aufgezeigt. Eine solche Möglichkeit besteht in der Ausführung von Probeinjektionen mit Wasser an vorgesehenen Injektionsstellen in den am Bauwerk anstehenden Baugrund. Neben der Darstellung der technischen Grundlagen und Anwendungsgrenzen wird für die einzelnen Arten der Gelinjektionen aufgeführt, welche baurechtlichen Anforderungen zu beachten sind.

Post‐Construction Sealing of Concrete Structures by Gel Grouting

This article deals with possibilities to seal concrete structures by other products than those authorized by the DAfStb. Among those products are grout injection gels which have several favourable properties which allow the user to seal even those structures where conventional methods might fail. Particularly for acrylate gel there is already a wide range of experience. This article describes the main properties of the materials, standard boundary conditions and the resulting types of sealing: curtain grouting, injections into the structural components or joints between structural elements, in cracks and a mixture of the methods mentioned above. The focus is set on curtain grouting which differs significantly from common grouting to repair cracks and defects. The usage of curtain grouting is limited. A method is described to recognize those limitations. One possibility could be to perform test injections at the original site using water instead of the gel. Apart from technical basics and practical limitations the requirements made by the authorities are characterized.
A fluorimetric method for the determination of atmospheric hydrogen sulfide with fluorescein
Authors: He Xia , Guoquan Gong , Huaigong Wang
Published: September 2010

A rapid, simple and sensitive fluorimetric method has been developed for the determination of hydrogen sulfide with fluorescein as fluorogenic reagent (λex=493nm, λem=518nm) at pH 6.1‐8.3. A linear calibration curve was obtained in the range 0.003‐0.25 μg H2S/25 ml. The detection limit is 0.003 μg H2S/25 ml. The method was successfully applied to the determination of atmospheric hydrogen sulfide.
Étude de la Cinétique de Décomposition des Phosphates de Djebel Onk Par l'Acide Nitrique
Authors: Mizane A. , Samar M. H. , Allal K. M.
Published: September 2010

The development of industrial processes designed to produce efficient fertilisers is nowadays of great importance, particularly in the field of farming. One way of producing phosphate fertilisers is by reacting phosphate rocks with nitric acid. In the present work, the kinetics of this reaction has been studied using phosphate mineral of the Djebel Onk mine (Algeria) and measurements of the conversion of P2O5 have been carried out by gravimetry. The effects of various operating parameters such as the reaction time, the reaction temperature, the nitric acid concentration and the size of the particle have been studied. The experimental conditions have been optimised and global kinetic data such as the reaction rate constant and the activation energy have been determined.
Solvent effect in the Wollgerodt‐Kindler reaction
Authors: Kanyonyo Martial R. , Ucar Huseyin , Isa Majed , Carato Pascal , Lesieur Daniel , Renard Pierre , Poupaert Jacques H.
Published: September 2010

The Willgerodt‐Kindler reaction was studied on three different model compounds (4‐bromo benzaldehyde, 4‐fluorobenzaldehyde, 4‐methoxyacetophenone) with particular emphasis on the influence of the solvent on the yield of the reaction. Best conditions involved the use of polar aprotic solvents such as DMF. This finding was applied to the Willgerodt‐Kindler reaction of two difficult substrates, i.e. 3‐methyl‐6‐formyl‐2 (3H)‐benzoxazolinone and 3‐methyl‐6‐formyl‐2(3H)‐benzothiazolinone with various secondary amines.
Kinetic studies of the reactions of 2‐diethylaminoethylchloride with nucleophilic reagents in N,N‐dimethylformamide
Authors: Yang H. , Thyrion F. C.
Published: September 2010

The kinetics of the reactions of 2‐diethylaminoethylchloride with nucleophilic reagents have been studied in N, N‐dimethylformamide from 33 to 80°. An ethyleneimmonium ion is easily formed from 2‐diethylaminoethylchloride by the participation of the neighbouring nitrogen atom. This ion is rather stable in N, N‐dimethylformamide solution and is in equilibrium with 2‐diethylaminoethylchloride. However, it reacts very rapidly with various nucleophilic reagents such as 8‐benzyltheophylline and 2‐(ethylamino)ethanol. The formation of the ethyleneimmonium ion is slower than the nucleophilic substitution reaction. The equilibrium constant and the rate constant of the formation of the ethyleneimmonium ion, as well as the rate constants of the nucleophilic substitution reactions, have been determined.
Réactions des Méthylazide et Phénylazide Avec Quelques Alcynes et Oléfines α‐Nitrées. Synthèse Régiospécifique des 1,2,3 Triazoles
Authors: Piet J. C. , Le Hetet G. , Cailleux P. , Benhaoua H. , Carrié R.
Published: September 2010

The reactions of alkynes and α‐nitro‐olefines with methylazide and phenylazide was studied. In contrast to known reactions with alkynes which are non‐regioselective, methylazide and phenylazide react regiospecifically with α‐nitro‐olefines and give only one type of triazole after elimination of HNO2. These reactions are very useful synthetic approaches to 1,2,3 triazoles.
Modification of surface properties due to the action of spillover species during catalytic reactions. An overview
Authors: Delmon Bernard
Published: September 2010

We give here an overview of new developments concerning spillover processes in catalysis. We focus on the remote control, namely the ability of spillover species to promote activity and selectivity and to act against the deactivation of catalysts. This deals both with the atomic level processes and the macroscopic description of the phenomenon, and alludes to the new chemical engineering developments the concept leads to. This summarizes several very recent reviews (1‐6).
Study of the behaviour of an autothermic catalytic reactor
Authors: Fontaine J. L. , Germain A.
Published: September 2010

In some cases, the mathematical expressions describing chemical problems are actually very difficult to handle. We are studying one of these systems, the non isothermal combustion of hydrogen‐oxygen‐nitrogen mixtures over Pd catalysts. Data obtained during stationary and dynamic experiments are analyzed by using neural networks, and the results are compared to results obtained on the same basis with orthogonal collocation. Neural networks analyze experimental data, in order to determine the behaviour of the system. Thanks to this tool, we are able to model the behaviour of such a difficult reactional system in a very good way. New improvements in the use of neural networks for the modelling of chemical phenomena are also showed.
Kinetics of surface reactions on the atomic scale
Authors: Kruse N.
Published: September 2010

The reaction of CO and NO with Rh crystals of almost hemispherical shape was studied at temperatures between 300 and 550 K. Strong morphological changes of the crystals were observed with atomic resolution in the field ion microscope (FIM). After field‐free reaction with CO at 420 K the hemispherical Rh crystal appeared to be transformed into polyhedral forms. The reaction with NO did not produce as regular forms as with CO. In particular, high‐index planes were largely absent after reaction in CO while they were still present, though redistributed, after reaction with NO. Adsorbate‐induced restructuring was found to be thermally activated. Using pulsed field desorption mass spectrometry (PFDMS), the underlying reaction mechanisms and kinetics were studied in small selected areas of up to 150 atomic sites. The interaction with CO led to the formation of Rh‐subcarbonyls, Rh(CO)x (x=1‐3). These species are most likely directly involved in the reconstruction process of the Rh sample. A reaction model is proposed according to which Rh‐dicarbonyl is liberated into the terrace parts of the surface after Rh‐Rh bond breaking in kink site positions. This is a repeatable step which ends as soon as an open chain of atoms is used up. Accordingly, kink sites are annihilated and facet structures with long chains of ledge atoms appear. The details of the reconstruction process with NO are not as clearly established as with CO. Multiple bonded NOad was not detected by PFDMS. Instead, considerable decomposition into nitrogen and oxygen atoms occurred which finding is in agreement with the catalytic activity known for Rh metal.
Hydrogen a probe molecule and a reactant on platinum catalysts
Authors: Barbier J. , Lamy‐Pitara E. , Marecot P.
Published: September 2010

The main results in the literature concerning the thermodynamics, the kinetics and the stoichiometry of adsorption of hydrogen in gas phase are compared to those obtained in liquid phase by transient electrochemical methods on platinum catalysts.

Two states of adsorbed hydrogen are identified: one strongly bound and not very mobile, the other weakly bound and mobile on the surface of the catalyst. The difference in the binding energy of that two states is close to 50kl./mol.

The catalytic hydrogenation of unsaturated compounds proves that only weakly bound hydrogen (or the most mobile) is active.

The nature of the hydrogen (or the binding energy Pt‐H) involved in the reaction varies with the nature of the unsaturated compounds under consideration. By controlling the nature of the adsorbed hydrogen (by means of the potential control of the catalyst) it is possible to orient the selectivity of the hydrogenation reactions.
Contact reactions of n‐butane and 2‐Methylpentane with well characterized clean metallic, carburized or oxidized tungsten surfaces
Authors: Wanner Sonia , Hemming Florence , Wehrer Pierre , Hindermann Jean‐Paul , Maire Gilbert
Published: September 2010

Oxygen is known to change drastically the surface states and the catalytic properties of transition metal carbides. In order to better understand the mechanism of the reaction of hydrocarbons with the oxygen modified surfaces, surfaces have been prepared by controlled additions of oxygen on a clean WC carbide. 2‐methylpentane and n‐butane were reacted on these surfaces. The obtained results have been compared with those observed on metal, oxygen predosed metal, and partially reduced oxide. A bifunctional mechanism seems to be operating on the oxygen modified surfaces.
Mössbauer study of the substituent effect in iron (III)‐complexes of nuclear substituted benzohydroxamic acids
Authors: Kane S. N. , Sharma A. K. , Gupta Ajay , Khadikar P. V. , Ali S. M.
Published: September 2010

A series of Tris‐(hydroxamate)‐tri‐aqua complexes of iron (III) with benzohydroxamic and nuclear substituted benzohydroxamic acid derivatives as ligands were investigated by Mössbauer spectroscopy. The substitutions changed the electron density on the donor atoms of the legend moiety by their electrophelic and / or nucleophelic nature and changed the symmetry of the complexes by their differential space requirements. Both the effects are reflected in the isomer shifts as well as the quadrupole splitting values.
Reactions of 3,5‐Diamino‐4‐Arylazopyrazoles with chlorinated quinones
Authors: Hassan Alaa A. , Mohamed Nasr K. , Aly Ashraf A. , Mourad Aboul‐Fetouh E.
Published: September 2010

3,5‐Diamino‐4‐arylazopyrazoles 1a‐d reacted with 3,4,5,6‐tetrachloro‐1,2‐benzoquinone(CHL‐o) via charge‐transfer (CT) complex formation giving bisimidazobenzobispyrazoles 5a‐d. On mixing either 2,3,5,6‐tetrachloro‐1,4‐benzoquinone(CHL‐p) or 2,3‐dichloro‐1,4‐naphthoquinone(DCHNQ) with 1a‐d in DMF, pyrazoloquinazolinetrione 8a‐d and 9a‐d derivatives were formed.
Correlation of X‐Ray K‐Absorption parameters with wiener indices
Authors: Kekre Pravin A. , Joshi K. P. , Khatri Sunil , Mishra Ashutosh
Published: September 2010

A new application of Wiener indices in estimating some X‐ray absorption parameters is described. X‐ray K‐absorption parameters are correlated with Wiener indices. Some hydroxy substituted pyridine copper(II) and cobalt(II) complexes are used to establish this type of correlation.
Perestroika effect. A novel example of electroviscosity
Authors: Mazurkiewicz Jozef , Tomasik Piotr
Published: September 2010

A novel type of rotary viscometer was constructed for rheological studies in an high intensity electric field. The title effect was observed for 1,4‐dioxane containing small but defined amounts of certain compounds. The application of the electric field caused destruction of the molecular arrangement in the solution. It was manifested by a sudden, temporary decrease of viscosity. The original molecular order in the solution was then soon reconstructed, nevertheless the factor causing the disorder was not removed. The removal of the potential gradient evoked similar disorder in the solutions under study. This disorder turned again into original pattern as shown by restored viscosity. The magnitude of this “electric shock” roughly depended on dielectric constant and concentration of the compound added to 1,4‐dioxane.
X‐ray structure of trans‐(2,5)‐bis(methoxymethyl)pyrrolidino carbohydroxamic acid
Authors: Tinant B. , Declercq J. P. , Gouverneur V.
Published: September 2010

The structure of the title compound has been established by X‐ray diffraction analysis. C9H18N2O4, Mr=218.25, monoclinic, P21/c a=9.249(6), b=10.138(2), c=12.175(6)Å, β=92.21(5)°, V=1141(1)Å3, Z=4, Dx=1.27g· cm−3, CuKα radiation (λ=1.54178Å). The final R index is 0.056 for 1860 observed reflections. The data confirm the trans relationship between the two methoxymethyl groups. Large deformation from the synperiplanar conformation and a very long C‐N bond are observed in the hydroxamic group. An intramolecular hydrogen bond occurs between the NH and an ether oxygen. Molecules form dimers by doing intermolecular H‐bonds between the carbonyl and the hydroxyl of the hydroxamic acid.
Réaction du Méthylazide Avec des Oléfines Cinnamiques, Crotoniques et Acryliques. Étude des Composés Obtenus
Authors: Le Hetet G. , Carrié R. , Benhaoua H.
Published: September 2010

Methylazide reacts with the title olefines and gives expected 1,2,3‐triazolines in equilibrium with corresponding amino diazo compounds. Because this equilibrium, E and Z olefines gives the same result, and the addition do not seem stereospecific. Thermolysis of this mixture gives one or two enamines. Oxidation with KMnO4 leads to triazoles. Reaction between methylazide and methyl acrylate or methyl vinylketone are more complicated because the amino diazo compounds react with starting alkene.
Immobilization and characteristics of β‐galactosidase on polymer resin
Authors: Xuyuan Li , Kehao Zhao , Yanfa Men , Weixia Tu
Published: September 2010

Sephadex G‐100 modified with chloracetic acid and CEAH was prepared into cationic and anionic carriers and actived by CNBr. β‐galactosidase β‐D‐galactoside galacto hydrolase EC3. 2. 1. 23) isolated and partially purified from gram chicken bean was immobilized on modified Sephadex G‐100 by means of adsorption of ions and crosslinked reaction. Both the anionic and cationic gel carriers have high protein binding capacity and high yield of enzyme activity. Kinetic results showed that the enzyme activity attained its maximum at 57°C for cationic carriers and 52°C for anionic carriers. In addition, the operational pH range of the immobilized preparations were increased. The immobilized enzymes showed good storage stability at room temperature than that of soluble enzyme. Results of repeated batch experiment suggested that the immobilized enzymes could be reused.
Diazoaldehyde Chemistry, Part 2: Transdiazotization of β,γ‐ and β,δ‐Dioxoaldehydes
Authors: Sezer Özkan , Hanci Nalan , Anaç Olcay
Published: September 2010

Base induced ring opening reactions of 2‐(substituted)‐4H‐pyran‐4‐ones (R=H, Ph) gave the corresponding 5‐(substituted)‐3,5‐dioxopentanals, which were in turn transdiazotized with 2‐azido‐1‐ethylpyridin‐1‐ium BF4. The reactions gave 5‐(substituted)‐2,4‐bis(diazo)‐3,5‐dioxopentanals and 4‐(substituted)‐1,3‐bis(diazo)‐2,4‐butandiones, the latter being the deformylating diazo transfer products. A two‐fold deformylation product (1,3‐bisdiazo‐2‐propanone) was observed in the reaction of 3‐oxopentandial, which was also synthesized from tosyl azide and 1,5‐bis(N‐methyl‐N‐phenylamino)‐trans,trans‐1,4‐pentadiene‐3‐one in low yield. 4‐(substituted)‐3‐diazo‐2,4‐butandieones also formed as side products. The reactions of 4,4‐dimethoxy‐3‐oxobutanal and ethyl 2,4‐dioxobutanoate with the same azidinium salt gave 1‐diazo‐3,3‐dimethoxy‐2‐propanone and ethyl 3‐diazo‐2‐oxopropanoate respectively.
Successive‐substitution methods in chemical‐equilibrium calculations: An application to aqueous simple ampholytic electrolytes
Authors: Cardinali Mario E. , Giomini Claudio , Marrosu Giancarlo
Published: September 2010

For each of the aqueous electrolytes, whose acid‐base behaviour is described by only one acidic, and only one basic, ionization equilibrium, the electroneutrality equation is rearranged (as described in Appendix) to such a form that the successive‐substitution algorithm to which it can give origin always converges to the root of the corresponding equation, i. e., to the hydrogen‐ion concentration of the solution it refers to. The converging properties of these algorithms are given a qualitative explanation.
Equilibrium deposition filtration: A simple technique to prepare very active and selective catalysts
Authors: Papadopoulou Ch. , Karakonstantis L. , Matralis H. K. , Kordulis C H. , Lycourghiotis A.
Published: September 2010

Results concerning the catalytic activity of catalysts prepared by Equilibrium Deposition Filtration (EDF) and corresponding catalysts prepared by conventional impregnation techniques are reported. These results show that the EDF and co‐EDF methodologies may be used for preparing very active catalysts even with quite high loading.
Reactions of acyl isothiocyanates with diphenyldiazomethane
Authors: L'Abbé Gerrit , Francis Agna , Dehaen Wim , Bosman Joris
Published: September 2010

The title reactions yield labile 4,5‐dihydro‐1,3‐oxazole‐4‐spiro‐2′‐thiiranes 4 which isomerize in solution to the thietan‐3‐imines 5. This isomerization also occurs when the spiro compounds are heated to their melting points, but here the desulfurized products 8 and 9 are also formed in some cases. These are also the products obtained by SO2 extrusion of the sulfones 10 derived from 5.
Synthesis of 2‐oxo‐Δ2‐Pyrrolino‐[1,2‐a]‐(4H)‐Perimidine by N,C‐cyclo‐condensation to A heterocyclic ketene AMINAL
Authors: Cado Françoise , Bazureau Jean Pierre , Hamelin Jack
Published: September 2010

2‐Substituted (1H)‐perimidine 1 reacts with various 2‐chloroacyl chlorides 3 to afford new ethyl 2‐oxo‐Δ2. pyrrolino‐[1,2‐a]‐(4H)‐perimidine‐3‐carboxylates 5 in good yields by a N,C‐cyclocondensation reaction sequence. The 1H, 13C NMR spectrum of some representative compounds are discussed. The reactions of 1 with trans‐cinnamoyl chloride 6 and with 3‐chloropropanoyl chloride 8 as β‐dielectrophiles have been investigated and gave directly the corresponding fused perimidines 7 with reverse regiochemistry.
Synthesis of some 4‐substituted 1‐[(2‐hydroxyethoxy)methyl]‐pyrazolo[3,4‐d]pyrimidines
Authors: Taha M. L. , Lazrek H. B. , Barascut J. L. , Imbach J. L.
Published: September 2010

A number of 4‐substituted pyrazolo[3,4‐d]pyrimidines 1a‐f has been coupled with (2‐acetoxyethoxy)methylbromide 2, using liquid‐liquid and solid‐liquid phase transfer catalysis. The influence of the solvent and catalyst has been studied. The N1 isomers have been regioselectively formed in a fairly good yields. All compounds 4a‐h have been evaluated against HIV and various DNA viruses and they have been found to be inactive.
ChemInform Abstract: New Ytterbium Compounds with the BaAl4 Type of Structure: Crystal Chemistry and Magnetic Properties of Yb(Cu,Ag,Au,Pd,Pt)xGa4‐x.
Authors: GRIN YU. N. , ELLNER M. , HIEBL K. , ROGL P.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Ternary Aluminides LnPdAl and LnPtAl.
Authors: HULLIGER F.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Growth and Infrared Characterization of GaPO4 in Phospho‐ Sulfuric Media.
Authors: COCHEZ M. , IBANEZ A. , GOIFFON A. , PHILIPPOT E.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Cation Deficient Perovskite‐Like Oxides in the System La4Ti3O12‐ LaTiO3.
Authors: BONTCHEV R. , DARRIET B. , DARRIET J. , WEILL F. , VAN TENDELOO G. , AMELINCKX S.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: BaNbF7‐x(OH)x: Preparation and Crystal Structure.
Authors: CROSNIER‐LOPEZ M. P. , DUROY H. , FOURQUET J. L.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: (MoIV 3S(S2)6)2‐ from Amorphous MoS3 by the Reaction with OH‐ and R = 0.015 Structure of (NH4)2(MoIV 3S(S2)6)×H2O.
Authors: MUELLER A. , DIEMANN E. , KRICKEMEYER E. , WALBERG H.‐J. , BOEGGE H. , ARMATAGE A.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Elaboration and Crystal Structure of Zinc‐Ammonium Cyclohexaphosphate Octahydrate: Zn2(NH4)2P6O18×8 H2O.
Authors: AVERBUCH‐POUCHOT M. T. , DURIF A.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Crystal Structure of Sr4Zn3F14: A New Stoichiometry in MF2‐M′F2 Systems.
Authors: KARIM M. , EL‐GHOZZI M. , LATOUCHE C. , AVIGNANT D.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Structure of Two Phases with Both Extended and Point Defects: Mn1‐xBi2+yS4 and Mn1‐xBi2+ySe4.
Authors: LEE S. , FISCHER E. , CZERNIAK J. , NAGASUNDARAM N.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: NbFe1.28Te3, a Quasi‐Layered Ternary Niobium Telluride Compound.
Authors: LI J. , MCDONNELL S. L. , MCCULLEY F.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Investigations of Ordered Structures in Boron‐Containing Pd3Mn Alloys.
Authors: SAKAMOTO Y. , TAKAO K. , NAGAOKA Y. , KIDA H. , FLANAGAN T. B.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Condensed Tetrakaidecahedral Clusters. Crystal Structure of NiTa8Se8.
Authors: CONRAD M. , HARBRECHT B.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Ternary Iron Chalcogenides A9Fe2X7 (A: K, Rb, Cs; X: S, Se): Synthesis, Crystal Structure and Magnetic Properties.
Authors: BRONGER W. , RUSCHEWITZ U.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Trimagnesium Rhenium(I) Heptahydride, Mg3ReH7, Containing Octahedral ( ReH6)5‐ Complex Anions.
Authors: HUANG B. , YVON K. , FISCHER P.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Properties of Fe3Al Matrix Composites with Al2O3 Particle Dispersions.
Authors: SUGANUMA K.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Osmium LIII Edge Extended X‐Ray Absorption Fine‐Structure Studies on the Osmium(VIII) Oxide‐Fluorides, OsO3F2, K(OsO3F3), and Cs2(OsO4F2).
Authors: BREWER S. A. , BRISDON A. K. , HOLLOWAY J. H. , HOPE E. G. , LEVASON W. , OGDEN J. S. , SAAD A. K.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Luminescence of Yttrium Orthoborate.
Authors: NOETZOLD D. , HERZOG G. , EYSSLER I.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: 155Gd Moessbauer Effect and Magnetic Properties of Al‐Substituted Gd2Fe17.
Authors: MULDER F. M. , THIEL R. C. , JACOBS T. H. , BUSCHOW K. H. J.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation and Characterization of a Dip‐Coated SnO2 Film for Transparent Electrodes for Transmissive Electrochromic Devices.
Authors: OLIVI P. , PEREIRA E. C. , LONGO E. , VARELLA J. A. , BULHOES L. O. S.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Photoelectrochemical Oxidation of n‐Si in Anhydrous HF‐Acetonitrile.
Authors: PROPST E. , KOHL P. A.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electrochemical Reduction of Hafnium Tetrachloride in Molten NaCl‐KCl.
Authors: POINSO J. Y. , BOUVET S. , OZIL P. , POIGNET J. C. , BOUTEILLON J.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Thermogalvanic Behavior of Acidic Cu2+/Cu System Induced by Laser Irradiation.
Authors: HSIAO M. C. , WAN C. C.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Corrosion Behavior of Sputter‐Deposited Amorphous Titanium‐Chromium Alloys in 1 M and 6 M HCl Solutions.
Authors: KIM J. H. , AKIYAMA E. , YOSHIOKA H. , HABAZAKI H. , KAWASHIMA A. , ASAMI K. , HASHIMOTO K.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Effect of Salt Concentration on Nickel Corrosion Behavior in Slightly Alkaline Solutions at Different Hydrostatic Pressures.
Authors: BECCARIA A. M. , POGGI G. , ARFELLI M. , MATTOGNO G.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Anodic Behavior of Iron in Anhydrous Dimethoxyethane and Passivation by Solvent Electropolymerization.
Authors: SCANLON J. F. , KRUGER J. , MORAN P. J.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation and Characterization of Noble Metal Solid Sols in Poly( methyl Methacrylate).
Authors: NAKAO Y.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Oxidation Stability of B4C‐MexBy Composite Materials.
Authors: RADEV D. , ZAHARIEV Z.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Selected Reactions of Fluorine Fluorosulfate, FOSO2F.
Authors: WILLNER H. , MISTRY F. , AUBKE F.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Zirconium Dioxide: A New Photosensitizer Under UV Irradiation.
Authors: GANGULY K. M. , SARKAR S. , BHATTACHARYYA S. N.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Determination of the Solubility of Fluorine in Various Solvents.
Authors: GAMBARETTO G. P. , CONTE L. , NAPOLI M. , LEGNARO E. , CARLINI F. M.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Preparation, Characterization, and Analyses of Triethylammonium Pentafluorotellurate(IV). Attempted Utilization of Triethylammonium and Pyridinium Pentafluorotellurate(IV) as Fluorinating Agents.
Authors: CARRE J. , SINITI M.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of Highly Ordered Mesoporous Materials from a Layered Polysilicate.
Authors: INAGAKI S. , FUKUSHIMA Y. , KURODA K.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis and Physicochemical Study of Hexafluorosilicates with Mixed Alkali Metal Cations.
Authors: ANTOKHINA T. F. , SAVCHENKO N. N. , SERGIENKO V. I. , IGNAT'EVA L. N. , MARKINA I. A.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis, Structure and Thermal Stability of Yb4Mg4Fe3H22.
Authors: HUANG B. , YVON K. , FISCHER P.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Microscopic Medium Effects on a Chemical Reaction. A Theoretical Study of Decarboxylation Catalyzed by Cyclodextrins as an Enzyme Model.
Authors: FURUKI T. , HOSOKAWA F. , SAKURAI M. , INOUE Y. , CHUJO R.
Published: September 2010

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.