bluuebunny/crossref_metadata_2025_split huggingface dataset:
Spectroscopic, mass spectrometry, and semiempirical investigation of a new ester of Monensin A with ethylene glycol and its complexes with monovalent metal cations
Authors: Huczyński Adam , Przybylski Piotr , Brzezinski Bogumil , Bartl Franz 
Published: March 2006

AbstractA new ester of Monensin A with ethylene glycol (MON2) has been synthesized by a new method and its ability to form complexes with Li+, Na+, and K+ cations has been studied by ESI MS, 1H and 13C NMR, FT–IR, and PM5 semiempirical methods. It is demonstrated that MON2 forms stable complexes of 1:1 stoichiometry with monovalent metal cations. The structures of the complexes are stabilized by intramolecular hydrogen bonds in which the OH groups are always involved. In the structure of MON2 the oxygen atom of the CO ester group is involved in very weak bifurcated intramolecular hydrogen bonds with two hydroxyl groups, whereas in the complexes of MON2 with monovalent metal cations the CO ester group is not engaged in any intramolecular hydrogen bonds. The structures of the MON2 and its complexes with Li+, Na+, and K+ cations are visualized and discussed in detail. © 2006 Wiley Periodicals, Inc. Biopolymers 82: 491–503, 2006This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com
The influence of homogenisation conditions on biomass‐adsorbent interactions during ion‐exchange expanded bed adsorption
Authors: Hubbuch Jürgen J. , Brixius Peter J. , Lin Dong‐Qiang , Mollerup Inger , Kula Maria‐Regina 
Published: March 2006

AbstractExpanded bed adsorption (EBA) is an integrative step in downstream processing allowing the direct capture of target proteins from cell‐containing feedstocks. Extensive co‐adsorption of biomass, however, may hamper the application of this technique. The latter is especially observed at anion exchange processes as cells or cell debris are negatively charged under common anion exchange conditions. The restrictions observed under these conditions are, however, directly related to processing steps prior to fluidised bed application. In this study, it could be shown that the effective surface charge of cell debris obtained during homogenisation is closely related to the debris size and thus to the homogenisation method and conditions. The amount and thus effect of cells binding to the adsorbent could be significantly decreased when optimising the homogenisation step not only towards optimal product release but towards a reduction of debris size and charge. The lower size and charge of the debris results not only in a reduced retention probability but also, in a lower collision probability between debris and adsorbent. The applicability was shown in an example where the homogenisation conditions of E. coli were optimised towards EBA applications. In a previous report (Reichert et al., 2001) studying the suitability of EBA for the capture of formate dehydrogenate from E. coli homogenate the pseudo affinity resin Streamline Red was identified as the only suitable adsorbent. The new approach, however, led to a system where anion exchange as capture step became possible, however, to the cost of binding capacity. © 2006 Wiley Periodicals, Inc.
Effect of biologically produced sulfur on gas absorption in a biotechnological hydrogen sulfide removal process
Authors: Kleinjan Wilfred E. , Lammers Jos N.J.J. , de Keizer Arie , Janssen Albert J.H. 
Published: March 2006

AbstractAbsorption of hydrogen sulfide in aqueous suspensions of biologically produced sulfur particles was studied in a batch stirred cell reactor, and in a continuous set‐up, consisting of a lab‐scale gas absorber column and a bioreactor. Presence of biosulfur particles was found to enhance the absorption rate of H2S gas in the mildly alkaline liquid. The mechanism for this enhancement was however found to depend on the type of particles used. In the gently stirred cell reactor only small hydrophilic particles were present (dp < 3 µm) and the enhancement of the H2S absorption rate can be explained from the heterogeneous reaction between dissolved H2S and solid elemental sulfur to polysulfide ions, S. Conditions favoring enhanced H2S absorption for these hydrophilic particles are: low liquid side mass transfer (kL), high sulfur content, and presence of polysulfide ions. In the set‐up of gas absorber column and bioreactor, both small hydrophilic particles and larger, more hydrophobic particles were continuously produced (dp up to 20 µm). Here, observed enhancement could not be explained by the heterogeneous reaction between sulfide and sulfur, due to the relatively low specific particle surface area, high kL, and low [S]. A more likely explanation for enhancement here is the more hydrophobic behavior of the larger particles. A local increase of the hydrophobic sulfur particle concentration near the gas/liquid interface and specific adsorption of H2S at the particle surface can result in an increase in the H2S absorption rate. © 2006 Wiley Periodicals, Inc.
Lasers—an effective artificial source of radiation for the cultivation of anoxygenic photosynthetic bacteria
Authors: Bertling K. , Hurse T.J. , Kappler U. , Rakić A.D. 
Published: March 2006

AbstractThe laser diode (LD) is a unique light source that can efficiently produce all radiant energy within the narrow wavelength range used most effectively by a photosynthetic microorganism. We have investigated the use of a single type of LD for the cultivation of the well‐studied anoxygenic photosynthetic bacterium,Rhodobacter capsulatus(Rb. capsulatus). An array of vertical‐cavity surface‐emitting lasers (VCSELs) was driven with a current of 25 mA, and delivered radiation at 860 nm with 0.4 nm linewidth. The emitted light was found to be a suitable source of radiant energy for the cultivation ofRb. capsulatus. The dependence of growth rate on incident irradiance was quantified. Despite the unusual nearly monochromatic light source used in these experiments, no significant changes in the pigment composition and in the distribution of bacteriochlorophyll between LHII and LHI‐RC were detected in bacterial cells transferred from incandescent light to laser light. We were also able to show that to achieve a given growth rate in a light‐limited culture, the VCSEL required only 30% of the electricity needed by an incandescent bulb, which is of great significance for the potential use of laser‐devices in biotechnological applications and photobioreactor construction. © 2006 Wiley Periodicals, Inc.
Microporous Metal–Organic Framework Constructed from Heptanuclear Zinc Carboxylate Secondary Building Units
Authors: Fang Qian‐Rong , Zhu Guang‐Shan , Xue Ming , Zhang Qing‐Lin , Sun Jin‐Yu , Guo Xiao‐Dan , Qiu Shi‐Lun , Xu Shi‐Tao , Wang Ping , Wang De‐Jun , Wei Yen 
Published: March 2006

AbstractA novel, three‐dimensional, noninterpenetrating microporous metal–organic framework (MOF), [Zn7O2(pda)5(H2O)2]⋅5 DMF⋅4 EtOH⋅ 6 H2O (1) (H2PDA=p‐phenylenediacrylic acid, DMF=N,N‐dimethylformamide, EtOH=ethanol), was synthesized by constructing heptanuclear zinc carboxylate secondary building units (SBUs) and by using rigid and linear aromatic carboxylate ligands, PDA. The X‐ray crystallographic data reveals that the seven zinc centers of 1 are held together with ten carboxylate groups of the PDA ligands and four water molecules to form a heptametallic SBU, Zn7O4(CO2)10, with dimensions of 9.8×9.8×13.8 Å3. Furthermore, the heptametallic SBUs are interconnected by PDA acting as linkers, thereby generating an extended network with a three‐dimensional, noninterpenetrating, intersecting large‐channel system with spacing of about 17.3 Å. As a microporous framework, polymer 1 shows adsorption behavior that is favorable towards H2O and CH3OH, and substantial H2 uptake. In terms of the heptanuclear zinc carboxylate SBUs, polymer 1 exhibits interesting photoelectronic properties, which would facilitate the exploration of new types of semiconducting materials, especially among MOFs containing multinuclear metal carboxylate SBUs.
Organocatalysis Mediated by (Thio)urea Derivatives
Authors: Connon Stephen J. 
Published: March 2006

AbstractOver the last decade the potential for N,N‐dialkyl(thio)urea derivatives to serve as active metal‐free organocatalysts for a wide range of synthetically useful reactions susceptible to the influence of general acid catalysis has begun to be realised. This article charts the development of these catalysts (with emphasis on the design principles involved), from early “proof‐of‐concept” materials to contemporary active chiral (bifunctional) promoters of highly selective asymmetric transformations.
Synthesis of Bridged and Metallobridged Bis(β‐cyclodextrin)s Containing Fluorescent Oxamidobisbenzoyl Linkers and Their Selective Binding towards Bile Salts
Authors: Liu Yu , Yu Hong‐Mei , Chen Yong , Zhao Yan‐Li 
Published: March 2006

AbstractA series of β‐cyclodextrin (β‐CD) dimers containing fluorescent 2,2′‐oxamidobisbenzoyl and 4,4′‐oxamidobisbenzoyl linkers—that is, 6,6′‐[2,2′‐oxamidobis(benzoylamino)]ethyleneamino‐6,6′‐deoxy‐bis(β‐CD) (2), 6,6′‐[2,2′‐oxamidobis(benzoylamino)]diethylenediamino‐6,6′‐deoxy‐bis(β‐CD) (3), 6,6′‐[4,4′‐oxamidobis(benzoylamino)]ethyleneamino‐6,6′‐deoxy‐bis(β‐CD) (4), and 6,6′‐[4,4′‐oxamidobis(benzoylamino)]diethylenediamino‐6,6′‐deoxy‐ bis(β‐CD) (5)—were synthesized from the corresponding oxamidobis(benzoic acid)s through treatment with mono[6‐aminoethyleneamino‐6‐deoxy]‐β‐CD or mono[6‐diethylenetriamino‐6‐deoxy]‐β‐CD. Further treatment of 2–5 with copper perchlorate gave their CuII complexes 6–9 in satisfactory yields. The conformation and binding behavior of 2–9 towards two bile salt guests—sodium cholate (CA) and sodium deoxycholate (DCA)—was comprehensively investigated by circular dichroism, 2D NMR spectroscopy, and fluorescence spectroscopy in Tris‐HCl buffer solution (pH 7.2) at 25 °C. Thanks to the cooperative host–linker–guest binding mode, the stoichiometric 1:1 complexes formed by bis(β‐CD)s 2–5 with bile salts gave high stability constants (KS values) of up to 103–104 M−1. Significantly, benefiting from the intramolecular 1:2 or 2:4 binding stoichiometry, the resulting complexes of metallobis(β‐CD)s 6–9 with bile salts gave much higher KS values of up to 106–107 M−2. The enhanced binding abilities of bis(β‐CD)s and metallobridged bis(β‐CD)s are discussed from the viewpoints of induced‐fit interactions and multiple recognition between host and guest.
The Effect of Multiple Substituents on Sandwich and T‐Shaped π–π Interactions
Authors: Ringer Ashley L. , Sinnokrot Mutasem O. , Lively Ryan P. , Sherrill C. David 
Published: March 2006

AbstractSandwich and T‐shaped configurations of substituted benzene dimers were studied by second‐order perturbation theory to determine how substituents tune π–π interactions. Remarkably, multiple substituents have an additive effect on the binding energy of sandwich dimers, except in some cases when substituents are aligned on top of each other. The energetics of substituted T‐shaped configurations are more complex, but nevertheless a simple model that accounts for electrostatic and dispersion interactions (and direct contacts between substituents on one ring and hydrogen atoms on the other), provides a good match to the quantum mechanical results. These results provide insight into the manner by which substituents csan be utilized in supramolecular design.
Cs3Se22, a Selenium‐Rich Caesium Polyselenide Containing Se8 Crowns and ∞2[Se63‐] Anions with Radical Character.
Authors: Kromm Anna , Sheldrick William S. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
High‐Pressure Synthesis of BaSr2P6N12 and BaCa2P6N12 and Comparison of the Structures of BaP2N4, BaCa2P6N12, and BaSr2P6N12.
Authors: Karau Friedrich , Schnick Wolfgang 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Stabilization of Highly Reactive “Naked Anions”: Synthesis, Crystal Structure and Vibrational Spectrum of [Na(12‐crown‐4)2]2 [P2S6]×CH3CN.
Authors: Gjikaj Mimoza , Brockner Wolfgang , Adam Arnold 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Crystal Structure and Optical Characterization of Pure and Nd‐Substituted Type III KGd(PO3)4.
Authors: Parreu I. , Carvajal J. J. , Solans X. , Diaz F. , Aguilo M. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chemical Substitution in Ba(Ln1/2Nb1/2)O3 (Ln: La, Nd, Sm, Gd, Tb, and Y) Microwave Ceramics and Its Influence on the Crystal Structure and Phonon Modes.
Authors: Dias Anderson , Khalam L. Abdul , Sebastian Mailadil T. , Paschoal Carlos William A. , Moreira Roberto L. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Parent of Misfit‐Layered Cobalt Oxides: [Sr2O2]qCoO2.
Authors: Yamauchi H. , Sakai K. , Nagai T. , Matsui Y. , Karppinen M. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Magnetism, Electron Paramagnetic Resonance, Electrochemistry, and Mass Spectrometry of the Pentacopper(II)‐Substituted Tungstosilicate [Cu5(OH)4(H2O)2 (A‐α‐SiW9O33)2]10‐, a Model Five‐Spin Frustrated Cluster.
Authors: Nellutla Saritha , van Tol Johan , Dalal Naresh S. , Bi Li‐Hua , Kortz Ulrich , Keita Bineta , Nadjo Louis , Khitrov Gregory A. , Marshall Alan F. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Controversy on the First Ionization Potential of PuO2 (Nearly) Settled by New Experimental Evidence.
Authors: Capone F. , Colle J. Y. , Hiernaut J. P. , Ronchi C. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Polymorph Discrimination of CaCO3 Mineral in an Ethanol/Water Solution: Formation of Complex Vaterite Superstructures and Aragonite Rods.
Authors: Chen Shao‐Feng , Yu Shu‐Hong , Jiang Jun , Li Fanqing , Liu Yankuan 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The Equilibrium Partial Pressure of HgI2 over and Thermodynamic Properties of Hg3Te2I2.
Authors: Hutchins Mark A. , Wiedemeier Heribert 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis of Main Group Polycations in Molten and Pseudo‐Molten GaBr3 Media
Authors: Kuznetsov Alexei N. , Popovkin Boris A. , Staahl Kenny , Lindsjoe Martin , Kloo Lars 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
High‐Pressure Synthesis, Crystal Structures, and Properties of Perovskite‐Like BiAlO3 and Pyroxene‐Like BiGaO3.
Authors: Belik Alexei A. , Wuernisha Tuerxun , Kamiyama Takashi , Mori Kazuhiro , Maie Makoto , Nagai Takuro , Matsui Yoshio , Takayama‐Muromachi Eiji 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
New Chalcogenidoarsenates with Transition Metal Complex Cations: [M(en)3]2As2S5 (M: Mn, Ni) and [Mn(en)3]2As2Se5.
Authors: Jia Ding‐Xian , Zhao Qian‐Xin , Dai Jie , Zhang Yong , Zhu Qin‐Yu 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chelated Heteroatoms in Polyoxometalates and the Topological Equivalence of {CoIII(en)} to Type II cis‐Dioxometal Centers. Synthesis and Structure of [{Co(en)(μ‐OH)2Co(en)}{PW10O37Co (en)}2]8‐ and [K@{Co(en)WO4}{WO(H2O)} (PW9O34)2]12‐.
Authors: Belai Nebebech , Pope Michael T. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Fivefold Coordination of a CuII—Aqua Ion: A Supramolecular Sandwich Consisting of Two Crown Ether Molecules and a Trigonal‐Bipyramidal [Cu(H2O)5]2+ Complex.
Authors: Shivaiah Vaddypally , Das Samar K. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Thermally Accelerated Asymmetric Hydrosilylations Using Ligated Copper Hydride.
Authors: Lipshutz Bruce H. , Frieman Bryan A. , Unger John B. , Nihan Danielle M. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Modular Chiral Selenium‐Containing Oxazolines: Synthesis and Application in the Palladium‐Catalyzed Asymmetric Allylic Alkylation.
Authors: Braga Antonio L. , Luedtke Diogo S. , Sehnem Jasquer A. , Alberto Eduardo E. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Design and Synthesis of New Bidentate Alkoxy‐NHC Ligands for Enantioselective Copper‐Catalyzed Conjugate Addition.
Authors: Clavier Herve , Coutable Ludovic , Toupet Loic , Guillemin Jean‐Claude , Mauduit Marc 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Pd(0)‐PhCOOH Catalyzed Addition of Oxygen Pronucleophiles to Allenes and Internal Alkynes.
Authors: Patil Nitin T. , Pahadi Nirmal K. , Yamamoto Yoshinori 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
I2‐Catalyzed Michael Addition of Indole and Pyrrole to Nitroolefins.
Authors: Lin Chunchi , Hsu Jianming , Sastry M. N. V. , Fang Hulin , Tu Zhijay , Liu Ju‐Tsung , Ching‐Fa Yao 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Experimental Evidence for a Dual Site Mechanism in Sn‐Beta and Sn‐MCM‐41 Catalysts for the Baeyer—Villiger Oxidation.
Authors: Corma Avelino , Renz Michael 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nickel‐Catalyzed Couplings and Cyclizations Involving Allenes, Aldehydes, and Organozincs.
Authors: Song Minsoo , Montgomery John 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Oppenauer‐Type Oxidation of Secondary Alcohols Catalyzed by Homogeneous Water‐Soluble Complexes.
Authors: Ajjou Abdelaziz Nait , Pinet Jean‐Louis 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Novel Reaction Products from the Hypervalent Iodine Oxidation of Hydroxylated Stilbenes and Isoflavones.
Authors: Lion Cedric J. , Vasselin David A. , Schwalbe Carl H. , Matthews Charles S. , Stevens Malcolm F. G. , Westwell Andrew D. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Pd‐Catalyzed Stereoselective Oxidation of Methyl Groups by Inexpensive Oxidants under Mild Conditions: A Dual Role for Carboxylic Anhydrides in Catalytic C—H Bond Oxidation.
Authors: Giri Ramesh , Liang Jue , Lei Jian‐Guang , Li Jiao‐Jie , Wang Dong‐Hui , Chen Xiao , Naggar Isaac Clement , Guo Chengyun , Foxman Bruce M. , Yu Jin‐Quan 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Photocatalytic Oxidation of Primary and Secondary Benzylic Alcohols to Carbonyl Compounds Catalyzed by H3PW12O40/SiO2 under an O2 Atmosphere.
Authors: Farhadi Saeid , Afshari Mozhgan , Maleki Mansoureh , Babazadeh Zaynab 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Benzylic Oxidation Catalyzed by Dirhodium(II,III) Caprolactamate
Authors: Catino Arthur J. , Nichols Jason M. , Choi Hojae , Gottipamula Sidhartha , Doyle Michael P. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A New Synthesis of cis‐Diol from Alkene Using Iodine‐Ammonium Cerium(IV) Nitrate.
Authors: Horiuchi C. Akira , Dan Gong , Sakamoto Masaki , Suda Kazuhiko , Usui Shigeru , Sakamoto Okihiko , Kitoh Shinya , Watanabe Satoshi , Utsukihara Takamitsu , Nozaki Sukekatsu 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
A General Method for the Deoxygenation of Aromatic N‐Oxides Using RuCl3×xH2O.
Authors: Kumar Sanjay , Saini Anil , Sandhu Jagir S. 
Published: March 2006

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.