bluuebunny/crossref_metadata_2025_split huggingface dataset:
A new mechanistic model for hydride transfer related to the redox couple NADH/NAD+. Criticism on the quantum‐chemical MO approach
Authors: Buck H.M. 
Published: September 2010

AbstractA mechanistic study of hydride transfer based on (simplified) NADH/NAD+ model systems is given. The new model originates from a classical mechanism generally indicated as being an intramolecular nucleophilic displacement reaction. There is some controversy with the results of quantum‐chemical calculations.
The CuA site of cytochrome c oxidase
Authors: Dennison Christopher , Canters Gerard W. 
Published: September 2010

AbstractThe recent exciting developments concerning the structure and function of the CuA site in cytochrome c oxidase (COX) and nitrous oxide reductase are reviewed. The XRD structures of a mitochondrial and a bacterial COX have been reported in 1995. In COX, the CuA centre is located in subunit II and is involved in electron transfer from a cytochrome c donor to the oxygen binding centre of the protein. The structural studies on the enzyme have revealed the coordination geometries of the many metal centres of COX, including the CuA site. A combination of spectroscopic and mutagenesis studies on the CuA centre led to the correct prediction of the structure of this unique copper centre. The construction of a CuA site in type 1 blue copper proteins is briefly discussed.
Aggregates of calix[4]arenes based on the 2,6‐diaminotriazine · imide system
Authors: Vreekamp Remko H. , Verboom Willem , Reinhoudt David N. 
Published: September 2010

AbstractThe synthesis of several calix[4]arenes functionalized with uracil or diaminotriazine moieties is described. The association between these complementary calix[4]arenes is strongly influenced by processes related to the position and directionality of the hydrogen‐bonding moieties. In the case of bis(uracil)calix[4]arene (4), self‐association is observed (K = 3.4 · 103 M−1 in CDCl3) whereas, in the case of bis(diamidotriazine)calix[4]arene (16), it was concluded from 1H‐NMR studies that intermolecular association is hampered by the formation of intramolecular hydrogen bonds. Due to the divergent orientation of the hydrogen‐bonding groups of bis(diaminotriazine)calix[4]arene (15b), it forms hydrogen‐bonded strands through interaction with 5‐ethyl‐5‐phenylbarbituric acid (17), resulting in the formation of a gel in chloroform.
Asymmetric reduction and Meerwein‐Ponndorf‐Verley reaction of prochiral aromatic ketones in the presence of optically pure 1‐aryl‐2,2‐dimethylpropane‐1,3‐diols
Authors: Xianming Hu , Kellogg Richard M. 
Published: September 2010

AbstractIn THF solution, NaBH4 in the presence of (S)‐(‐)‐1‐(2‐chlorophenyl)‐2,2‐dimethylpropane‐1,3‐diol together with 2‐chlorobenzoic acid reduced propiophenone to 1‐ phenylpropan‐1‐ol in up to 40% enantiomeric excess (ee). Only 21% ee was obtained without an added acid. (R)‐(‐)‐butane‐1,3‐diol and (R)‐( + )‐1,1′‐binaphthalene‐2,2′‐diol did not form clear solutions with NaBH4 in THF and only gave a low ee. Of the organic acid additives investigated, (S)‐(–)‐4‐(2‐chlorophenyl)‐5,5‐dimethyl‐2‐hydroxy‐1,3,2‐dioxaphosphorinane 2‐oxide gave the highest ee (46%). However, with AlCl3/NaBH4/(S)‐(–)‐1‐(2‐chlorophenyl)‐2,2‐dimethylpropane‐1,3‐diol in THF the best result was obtained (ee 55%).Asymmetric Meerwein‐Ponndorf‐Verley (MPV) reductions of acetophenone by isopropanol in the presence of these chiral diols as auxiliary have also been carried out. For the case of aluminium triisopropoxide, (R)‐(–)‐1‐phenyl‐2,2‐dimethylpropane‐1,3‐diol and acetophenone(1/1/1), an ee of up to 20% for 1‐phenylethanol was obtained whereas with (R)‐(+)‐1,1′‐binaphthalene‐2,2′‐diol an ee of 32% was obtained. Lanthanide triisopropoxides, Ln(OiPr)3, have also been used. Of the various lanthanides (Ln = La, Y, Er, Tb, and Eu) the Er triisopropoxide with chiral (R)‐(–)‐1‐phenyl‐2,2‐dimethyl‐propane‐1,3‐diol gave the best result; 46% ee for 1‐phenylethanol. Lanthanide chloride diisopropoxides, LnCl(OiPr)2, were also used as catalysts; although these have high catalytic activities they unfortunately give little chiral recognition.
Polyanion inhibitors of human immunodeficiency virus. Part III. Polymerized anionic surfactants derived from D‐glucose
Authors: Leydet Alain , Jeantet‐Segonds Christine , Barthélémy Philippe , Boyer Bernard , Roque Jean Pierre 
Published: September 2010

AbstractA series of new polyanions was synthesized via γ‐polymerization in aqueous micellar solution of ω‐unsaturated anionic surfactants derived from D‐glucose. These polyanions were evaluated for their activity against HIV‐1. All tested compounds proved active, although non‐toxic to the host cells (CEM‐4).
A new and convenient method for the preparation of 2,7‐dihydro‐1H‐dibenzo[c,e]tellurepin: Reactions and ligand properties
Authors: Al‐Rubaie Ali Z. , Al‐Marzook Asmahan Y. , Al‐Jadaan Shakeer A. N. 
Published: September 2010

AbstractTreatment of 2,2′‐bis(bromomethyl)biphenyl with potassium tellurocyanate in dry DMSO gave 1,7‐dihydro‐1H‐dibenzo[c,e]tellurepin (1) in 60% yield as an unexpected product. The following new derivatives of 1 have been prepared: C14H12TeCl2 (2), C14H12TeBr2 (3), C14H12Tel2 (4), C14H12Te(CH3)I (5) and C14H12Te(C2H5)I (6).Mononuclear and dinuclear palladium complexes [i.e. (C14H12)2PdCl2 (7) and [(C14H12Te)PdCl2]2 (8)] were prepared by the reaction of 1 with PdCl2(PhCN)2 and Na2PdCl4, respectively. Reaction of RhCl3 · 3H2O with an excess of 1 gave the monomeric Rh(I) complex, (C14H12Te)3RhCl (9). Compound 1 readily forms a 1: 1 charge‐transfer complex with TCNE while it reduces the carbonyl groups in DDQ and TCQ to hydroxyl groups. Conductivity, UV‐Vis, IR and 1H‐ and 13C‐NMR data for the new compounds are presented and discussed.
First stereospecific synthesis of (E)‐1,2‐bis(selenocyanato)ethenes by the addition of dicyanodiselenide to acetylenes
Authors: Potapov V.A. , Amosova S.V. , Dudareva G.N. , Shestakova V.Y.U. , Zhnikin A.R. , Petrov B.V. , Aksamentova T.N. 
Published: September 2010

AbstractThe addition of dicyanodiselenide to acetylene, phenylacetylene and diphenylacetylene proceeds in an anti manner to afford, in 70‐80% yield, (E)‐1,2‐bis(selenocyanato)ethenes which are prospective precursors of polymers with potential conductivity.
The study of NO adsorbate layers on platinized platinum in the liquid phase with cyclic voltammetry, DEMS and FTIRS
Authors: Gootzen J.F.E. , van Hardeveld R.M. , Visscher W. , van Santen R.A. , van Veen J.A.R. 
Published: September 2010

AbstractThe irreversible adsorbates formed after exposure of platinum to an NO‐containing solution were studied with Differential Electrochemical Mass Spectrometry (DEMS), Fourier‐Transform Infrared Spectroscopy (FTIRS) and cyclic voltammetry. DEMS and FTIRS show that only a very small amount of N2O is formed in the reduction of the adsorbate, indicating that mainly non‐volatile products are formed. FTIRS shows, in addition, vibrations of NO at wavenumbers characteristic of adsorbed NO on Pt(100) and Pt(110) sites. These two different adsorption sites are characterized by separate reduction peaks in the cyclic voltammogram. Further, it was established with FTIRS that the adsorbate is transformed to N2O and NH+4 in the reduction, and to NO−3 in the oxidation. Analysis of the charges involved in the reduction and oxidation of the irreversible adsorbates demonstrates that coadsorbates are present next to NO. The coadsorbates consist of adsorbed nitrogen atoms, formed by the dissociation of NO. This view is supported by previously reported studies in Ultra High Vacuum (UHV). A new mechanism for the reduction of NO to N2O in the liquid phase is proposed on the basis of NO dissociation.
Phosphoramidites: Novel modifying ligands in rhodium catalysed hydroformylation
Authors: van Rooy Annemiek , Burgers Dennis , Kamer Paul C. J. , van Leeuwen Piet W. N. M. 
Published: September 2010

AbstractThe phosphoramidites 2–9 have been applied as modifying ligands in rhodium‐catalysed hydroformylation of oct‐1‐ene and styrene. Monodentate phosphoramidites 2–5 gave rise to catalysts with average rates of 1000 mol [mol Rh]−1 h−1 and maximum selectivities of 65% to the linear product nonanal for the hydroformylation of oct‐1‐ene (P 20 bar CO/H2, T 80°C, [oct‐1‐ene] ≈︁ 1 M). Styrene was hydroformylated (T 40°C, P 20 bar CO/H2) at rates up to 150 mol [mol Rh]−1 h−1 and a selectivity for the branched 2‐phenylpropanal of 93%. Using diphosphoramidite modified catalysts a maximum rate of 1200 mol.[mol Rh]−1.h−1 for oct‐1‐ene was observed for 9, with 91% regioselectivity for the linear product. At 40°C styrene was hydroformylated at rates up to 25 mol [mol Rh]−1 h−1 and with selectivities for the branched aldehyde of 89%. Characterization of the rhodium complexes showed that formation of rhodium hydride complexes is slow and incomplete under the conditions applied for the monophosphoramidites. The diphosphoramidite ligands all form bidentate hydrido‐rhodium complexes. The diphosphoramidite ligands 6–9 coordinate bis‐equatorially in the trigonal bipyramidal rhodium complexes, which accounts for the high regioselectivities.
Biocatalytic large‐scale production of 13(S)‐hydroperoxy‐9(Z), 11(E) octadecadienoic acid from hydrolysed safflower oil by a crude soybean‐flour extract as lipoxygenase source
Authors: Elshof M.B.W. , Janssen M. , Veldink G.A. , Vliegenthart J.F.G. 
Published: September 2010

AbstractLipoxygenase‐1 extracted from crude soybean‐flour was incubated with hydrolysed safflower oil as a substrate in a 7‐1 fermentor. Optimized reaction conditions included pH 10.0, 5°C and air saturation. Under these conditions production on a 40‐g/l scale can easily be carried out yielding up to 80% 13‐hydroperoxy‐9(Z), 11 (E)‐octadecadienoic acid with a stereo‐configuration of essentially (>95%) S.
The reaction of ammonia and ethanol or related compounds towards pyridines over high‐silica zeolites with medium pore size
Authors: le Febre R.A. , Hoefnagel A.J. , van Bekkum H. 
Published: September 2010

AbstractPyridine bases were formed by the reaction of ethanol and ammonia over zeolite Nu‐10 in the presence of oxygen, which was shown to play an essential role. The use of different proton‐introduction procedures resulted in different activities and selectivities of the catalyst. H‐Nu‐10 and H‐ZSM‐5 showed substantially higher pyridine selectivity than H‐mordenite. In order to clarify the reaction mechanism of the title reaction, several other small amines and oxygenates were tested in the presence/absence of oxygen with respect to their selectivity towards pyridines. Zeolitic acid sites were shown to catalyse the dehydrogenation of ethanol, together with condensation, cyclization and aromatization, while structural defects probably produced oxidation products such as acetaldehyde and formaldehyde which are thought to play an important role in the reaction. The use of methylamine instead of ammonia greatly enhanced the pyridine selectivity.
The mechanism of n‐butane oxidation. Characterization of titania‐supported V‐P‐O catalysts by pulse‐flow experiments and in‐situ XANES spectroscopy
Authors: Ruitenbeek M. , Overbeek R.A. , van Dillen A.J. , Koningsberger D.C. , Geus J.W. 
Published: September 2010

AbstractWell‐dispersed supported V‐P‐O (Vanadium Phosphorus Oxyde) catalysts were prepared and tested in the selective oxidation of n‐butane to maleic anhydride. Because of their high activity, it was possible to test titania‐supported catalysts in a two‐step oxidation reduction process at low temperatures. After n‐butane adsorption and activation in the absence of molecular oxygen, desorption took place after subsequent introduction of molecular oxygen into the gas stream, leading to the selective formation of maleic anhydride.In‐situ XANES spectroscopy was performed under reaction conditions in the two‐step oxidation reduction process with a special titania‐supported V‐P‐O catalyst with a high loading. The results of these experiments showed that, after equilibration, no more changes in the valence state of vanadium were observed after reduction or subsequent re‐oxidation. This indicates that the generally assumed Mars‐Van‐Krevelen mechanism is not operative for the titania‐supported V‐P‐O catalyst.
Preparation, characterization and testing of titania‐supported iron oxide based dehydrogenation catalysts
Authors: Boot Ludo A. , van der Linde Simon C. , van Dillen Adrianus J. , Geus John W. , van Buren Frederik R. 
Published: September 2010

AbstractIron oxide‐based catalysts supported on titania and zirconia have been investigated as alternatives for the currently used bulk iron oxide dehydrogenation catalysts. The present study focuses on titania‐supported catalysts. Catalyst samples were prepared by pore‐volume impregnation of commercially available pre‐shaped support bodies with solutions of various iron precursor compounds. Transmission electron microscopy (TEM) and temperature‐programmed reduction (TPR) revealed that the best microscopic distribution is achieved with ammonium iron citrate. X‐ray diffraction (XRD) showed a difference between the investigated supports: on rutile TiO2, iron was present as hematite (Fe2O3), whereas on anatase, pseudobrookite (Fe2TiO5) was formed. When testing the catalytic activity in but‐1‐ene dehydrogenation, rapid deactivation was observed which could not be prevented by using a catalyst containing potassium. Without potassium, deactivation is attributed to the formation of ilmenite, FeTiO3. With potassium, the iron oxide phase reacts with both potassium and TiO2, which diminishes the activity which initially was present in catalysts without potassium. When a more inert support is used, viz. ZrO2, no solid state reaction is observed, and a stable catalyst is obtained.
Novel organomanganese(II) complexes active as homogeneous catalysts in manganese(II)/copper(I) catalyzed carbon‐carbon bond formation reactions
Authors: Donkervoort Johannes G. , Vicario José L. , Jastrzebski Johann T. B. H. , van Koten Gerard , Cahiez Gérard 
Published: September 2010

AbstractNovel organomanganese complexes 3 and 4 were prepared via transmetallation of the corresponding organolithium reagent. These new complexes are active catalysts in manganese/copper mediated cross‐coupling reactions.
Hybrid Polymer‐Grafted Multiwalled Carbon Nanotubes for In vitro Gene Delivery
Authors: Nunes Antonio , Amsharov Nadja , Guo Chang , Van den Bossche Jeroen , Santhosh Padmanabhan , Karachalios Theodoros K. , Nitodas Stephanos F. , Burghard Marko , Kostarelos Kostas , Al‐Jamal Khuloud T. 
Published: September 2010

AbstractCarbon nanotubes (CNTs) consist of carbon atoms arranged in sheets of graphene rolled up into cylindrical shapes. This class of nanomaterials has attracted attention because of their extraordinary properties, such as high electrical and thermal conductivity. In addition, development in CNT functionalization chemistry has led to an enhanced dispersibility in aqueous physiological media which indeed broadens the spectrum for their potential biological applications including gene delivery. The aim of this study is to determine the capability of different cationic polymer‐grafted multiwalled carbon nanotubes (MWNTs) (polymer‐g‐MWNTs) to efficiently complex and transfer plasmid DNA (pCMV‐βGal) in vitro without promoting cytotoxicity. Carboxylated MWNT is chemically conjugated to the cationic polymers polyethylenimine (PEI), polyallylamine (PAA), or a mixture of the two polymers. In order to explore the potential of these polymer‐g‐MWNTs as gene delivery systems, we first study their capacity to complex plasmid DNA (pDNA) using agarose gel electrophoresis. Gel migration studies confirm pDNA binding to polymer‐g‐MWNT with different affinities, highest for PEI‐g‐MWNT and PEI/PAA‐g‐CNT constructs. β‐galactosidase expression is assessed in human lung epithelial (A549) cells, and the cytotoxicity is determined by modified LDH assay after 24 h incubation period. Additionally, PEI‐g‐MWNT and/or PEI/PAA‐g‐MWNT reveal an improvement in gene expression when compared to the naked pDNA or to the equivalent amounts of PEI polymer alone. Mechanistically, pDNA was delivered by the polymer‐g‐MWNT constructs via a different pathway compared to those used by polyplexes. In conclusion, polymer‐g‐MWNTs may be considered in the future as a versatile tool for efficient gene transfer in cancer cells in vitro, provided their toxicological profile is established.
Testing aspect‐oriented programs with finite state machines
Authors: Xu Dianxiang , El‐Ariss Omar , Xu Weifeng , Wang Linzhang 
Published: September 2010

SUMMARYAspect‐oriented programming yields new types of programming faults due to the introduction of new constructs for dealing with crosscutting concerns. To reveal aspect faults, this paper presents a framework for testing whether or not aspect‐oriented programs conform to their state models. It supports two families of strategies (i.e. structure‐oriented and property‐oriented) for automated generation of aspect tests from aspect‐oriented state models. A structure‐oriented testing strategy derives tests and test code from an aspect‐oriented state model to meet a given structural coverage criterion, such as state coverage, transition coverage, or round trip. A property‐oriented testing strategy generates test code from the counterexamples of model checking. Two such strategies are checking an aspect‐oriented state model against trap properties and checking mutants of aspect models against system properties. Mutation analysis of aspect‐oriented programs is used to evaluate the effectiveness of these testing strategies. The experiments demonstrate that testing aspect‐oriented programs against their state models can detect many aspect faults. The comparative evaluations also reveal that the structure‐oriented and property‐oriented testing strategies complement each other—some aspect faults were detected by the structure‐oriented strategies, but not by the property‐oriented strategies and vice versa. Copyright © 2010 John Wiley & Sons, Ltd.
Mental time travel in animals
Authors: Cheke Lucy G. , Clayton Nicola S. 
Published: September 2010

AbstractTwelve years on from Suddendorf and Corballis's mental time travel (MTT) hypothesis, the debate as to whether episodic cognition is unique to humans remains unresolved. In this article, we review the evidence for mental time travel in nonhuman animals and the empirical methods used in this field. Investigation of episodic‐like memory has been dominated by ‘What–Where–When’ paradigms, with limited success outside of food‐caching corvids, and with only scrub‐jays meeting Clayton and colleagues' more specific description of the underlying mnemonics. The recent emergence of an ‘unexpected question’ paradigm tapping recall of unattended aspects of episodes provides a promising new avenue for future studies. Falsification of the Bischof–Köhler hypothesis, that acting to satisfy a future motivational state is beyond the scope of nonhuman animals, has been the ‘holy grail’ of animal future planning research, spawning a plethora of studies. We argue that although the criterion proposed by this hypothesis provides a test for an explicit representation of a future time, it does nothing to get at whether planning for this future is mediated by semantic or episodic processes. WIREs Cogn Sci 2010 1 915–930This article is categorized under:

Psychology > Memory
Übergangsmetall‐Komplexe mit π‐Allyl‐ und π‐Enyl‐Liganden
Authors: Fischer Ernst Otto , Werner Helmut 
Published: September 2010

AbstractKomplexverbindungen mit π‐Allyl‐ bzw. π‐Enyl‐Liganden sind in den letzten Jahren von einer Reihe von Übergangselementen bekannt geworden. Zu ihrer Darstellung geht man von geeigneten Metallhalogeniden oder ‐carbonylen aus, die zumeist mit Allyl‐Verbindungen oder Olefinen zur Umsetzung gebracht werden. Die erhaltenen Substanzen sind fast ausnahmslos diamagnetisch, kristallin oder in organischen Medien gut löslich; sie zeichnen sich durch teilweise bemerkenswerte Stabilität und oft hohe Flüchtigkeit aus. Physikalisch‐chemische Untersuchungsergebnisse bestätigen eindeutig das Vorliegen eines delokalisierten π‐Elektronensystems in den π‐Allyl‐ bzw. π‐Enyl‐Resten. Ihre Bindung an das Zentralatom kann mit derjenigen in Cyclopentadienyl‐Metall‐Komplexen verglichen werden.
Element‐organische Verbindungen (III) Ein neuer Aspekt der π‐Bindung: π‐Komplexbildung in einem Aromaten‐Metallporphyrinähnlichen System [1]
Authors: Tsutsui Minoru 
Published: September 2010

AbstractIn dieser Arbeit wird über die Synthese von Benzol‐bis‐dipyridyl‐chrom‐jodid und Diphenyl‐bis‐dipyridyl‐chrom‐jodid berichtet, die eine neue Klasse von π‐Komplexen vertreten, in welchen das Metallatom von vier Stickstoffliganden, wahrscheinlich in quadratischplaner Anordnung, und einem π‐gebundenen Aromaten umgeben ist.Besonders für die Chemie von natürlich vorkommenden Verbindungen, wie Metallporphyrinen, Cytochromen, Vitam B12 u. a., kann die Entdeckung der Bildung einer π‐Bindung zwischen einem aromatischen Ring und einem Metall mit vier Stickstoffliganden von Bedeutung sein.
Das elektrochemische Potential der Amalgame
Authors: Jangg G. , Kirchmayr H. 
Published: September 2010

AbstractAuf Grund thermodynamischer Überlegungen läßt sich eine allgemein gültige Formel für die Berechnung des elektrochemischen Potentials beliebig zusammengesetzter Amalgame angeben. Es werden auch Sonderfälle dieser Gleichung für an Metall gesättigte Amalgame und für Amalgame von Metallen, die mit Quecksilber keine Verbindungen bilden, diskutiert.Experimentelle Bestimmungen des Potentials verschiedener Amalgame bestätigten die erarbeiteten Formeln. Lediglich das gemessene Potential von Amalgamen extrem wenig in Quecksilber löslicher Metalle sowie das von Amalgamen mit sehr geringer Metallkonzentration weicht vom theoretisch geforderten Wert ab. Die Abweichung ist, was bewiesen werden konnte, auf die leichte Polarisierbarkeit derartiger Amalgame zurückzuführen.
Carborane
Authors: Issleib Kurt , Lindner Rolf , Tzschach Alfred 
Published: September 2010

AbstractDas Gebiet der Borwasserstoff‐ und Bororganoverbindungen ist nach den grundlegenden Arbeiten A. Stocks über Borwasserstoffe (1912 bis 1936) erst in jüngster Zeit vor allem aus zwei Gründen wieder in den Blickpunkt des Interesses gerückt. So waren es einmal die Suche nach energiereichen Raketentreibstoffen, wobei Borwasserstoff‐Verbindungen eine zentrale Stellung einnahmen, und zum anderen neuere Anschauungen zur chemischen Bindung in Elektronenmangelverbindungen, hier speziell die Interpretation der Strukturen und Bindungsverhältnisse in Borwasserstoffen [1], durch die wesentliche Fortschritte auf dem Gebiet der Bororganoverbindungen erzielt wurden.
Ionenaustauschgleichgewichte an stark sauren Polymerisations‐Austauscherharzen auf Basis p‐Vinylanisol
Authors: Wolf F. , Koch H. 
Published: September 2010

AbstractIonenaustauscherharze auf Basis Polyvinylanisol wurden in der Literatur bisher nur als Popcorn‐Polymerisate mit relativ niedriger Kapazität beschrieben [1]. Beachtet man aber die Tatsache, daß bei niedermolekularen aromatischen Verbindungen Alkoxylgruppen auf Grund von Resonanzeffekten einen positiven Einfluß auf die Reaktivität des aromatischen Ringsystems bei elektrophilen Substitutionsreaktionen ausüben, dann sollte auch die Möglichkeit bestehen, vernetzte Copolymerisate auf Basis p‐Vinylanisol‐Divinylbenzol durch Sulfonierung unter optimalen Bedingungen in hochkapazitive Ionenaustauscher zu überführen, deren aromatische Kerne wenigstens teilweise disulfoniert sind. Unsere Arbeiten verfolgten das Ziel, Kationenaustauscherharze auf Basis p‐Vinylanisol mit hoher Austauschkapazität bei guter physikalischer Stabilität herzustellen, diese Harze physikalisch‐chemisch zu charakterisieren und ihre Selektivität bei Ionenaustauschprozessen zu untersuchen. Sämtliche Untersuchungen wurden zu Vergleichszwecken auch mit einem unter gleichen Bedingungen hergestellten Polystyrolharz (10 Mol‐% DVB) und mit zwei Kondensationsharzen auf Basis Anisol‐Triarylmethansulfosäure durchgeführt.