bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: New Mild and Efficient Synthesis of Peptidosulfonamides.
Authors: Papandrea Giovanni , Ponticelli Fabio 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Total Synthesis of Salinamide A: A Potent Antiinflammatory Bicyclic Depsipeptide.
Authors: Tan Li , Ma Dawei 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient Acetylation and Boc Protection of Carbohydrates, Phenols and Amines.
Authors: Mandal Pintu Kumar , Misra Anup Kumar 
Published: July 2008

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 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 Sedamine (III) by Cycloisomerization of an Allenic Hydroxylamine.
Authors: Bates Roderick W. , Nemeth Joseph A. , Snell Robert H. 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Penicillenols from Penicillium sp. GQ‐7, an Endophytic Fungus Associated with Aegiceras corniculatum.
Authors: Lin Zhen‐Jian , Lu Zhen‐Yu , Zhu Tian‐Jiao , Fang Yu‐Chun , Gu Qian‐Qun , Zhu Wei‐Ming 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Recent Advances and Future Prospects in Peptaibiotics, Hydrophobin, and Mycotoxin Research, and Their Importance for Chemotaxonomy of Trichoderma and Hypocrea
Authors: Degenkolb Thomas , von Doehren Hans , Nielsen Kristian Fog , Samuels Gary J. , Brueckner Hans 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ecdysteroids from Vitex Species: Distribution and Compilation of Their 13C‐NMR Spectral Data
Authors: Sena Filho Jose G. , Duringer Jennifer , Maia Gabriela L. A. , Tavares Josean F. , Xavier Haroudo S. , Sobral da Silva Marcelo , da‐Cunha Emidio V. L. , Barbosa‐Filho Jose M. 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Is Osmylation Always Preferring the Richest Double Bond?
Authors: Francais Antoine , Bedel Olivier , Haudrechy Arnaud 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Combinatorial Chemistry on Solid Phases
Authors: Kidwai Mazaahir , Mohan Richa 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Design of C2‐Symmetric Chiral Phase‐Transfer Catalysts for Practical Asymmetric Synthesis
Authors: Maruoka Keiji 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Sixty Years of the Grunwald—Winstein Equation: Development and Recent Applications
Authors: Kevill Dennis N. , D'Souza Malcolm J. 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Prepraration and Properties of Proteinaceous Microspheres Made Sonochemically
Authors: Gedanken Aharon 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Single Molecule Analysis by Surfaced‐Enhanced Raman Scattering
Authors: Pieczonka Nicholas P. W. , Aroca Ricardo F. 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Intracellular Applications of Analytical SERS Spectroscopy and Multispectral Imaging
Authors: Chourpa Igor , Lei Franck H. , Dubois Pierre , Manfait Michel , Sockalingum Ganesh D. 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Quantitative Surface‐Enhanced Raman Spectroscopy
Authors: Bell Steven E. J. , Sirimuthu Narayana M. S. 
Published: July 2008

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 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 Surface‐Enhanced Raman Spectroscopy of Nanostructures
Authors: Wu De‐Yin , Li Jian‐Feng , Ren Bin , Tian Zhong‐Qun 
Published: July 2008

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
The translocation of signaling molecules in dark adapting mammalian rod photoreceptor cells is dependent on the cytoskeleton
Authors: Reidel Boris , Goldmann Tobias , Giessl Andreas , Wolfrum Uwe 
Published: July 2008

AbstractIn vertebrate rod photoreceptor cells, arrestin and the visual G‐protein transducin move between the inner segment and outer segment in response to changes in light. This stimulus dependent translocation of signalling molecules is assumed to participate in long term light adaptation of photoreceptors. So far the cellular basis for the transport mechanisms underlying these intracellular movements remains largely elusive. Here we investigated the dependency of these movements on actin filaments and the microtubule cytoskeleton of photoreceptor cells. Co‐cultures of mouse retina and retinal pigment epithelium were incubated with drugs stabilizing and destabilizing the cytoskeleton. The actin and microtubule cytoskeleton and the light dependent distribution of signaling molecules were subsequently analyzed by light and electron microscopy. The application of cytoskeletal drugs differentially affected the cytoskeleton in photoreceptor compartments. During dark adaptation the depolymerization of microtubules as well as actin filaments disrupted the translocation of arrestin and transducin in rod photoreceptor cells. During light adaptation only the delivery of arrestin within the outer segment was impaired after destabilization of microtubules. Movements of transducin and arrestin required intact cytoskeletal elements in dark adapting cells. However, diffusion might be sufficient for the fast molecular movements observed as cells adapt to light. These findings indicate that different molecular translocation mechanisms are responsible for the dark and light associated translocations of arrestin and transducin in rod photoreceptor cells. Cell Motil. Cytoskeleton 65: 785–800, 2008. © 2008 Wiley‐Liss, Inc.
Sox9 is expressed in mouse multipotent retinal progenitor cells and functions in Müller Glial cell development
Authors: Poché Ross A. , Furuta Yasuhide , Chaboissier Marie‐Christine , Schedl Andreas , Behringer Richard R. 
Published: July 2008

AbstractIt is widely accepted that the process of retinal cell fate determination is under tight transcriptional control mediated by a combinatorial code of transcription factors. However, the exact repertoire of factors necessary for the genesis of each retinal cell type remains to be fully defined. Here we show that the HMG‐box transcription factor, Sox9, is expressed in multipotent mouse retinal progenitor cells throughout retinogenesis. We also find that Sox9 is downregulated in differentiating neuronal populations, yet expression in Müller glial cells persists into adulthood. Furthermore, by employing a conditional knockout approach, we show that Sox9 is essential for the differentiation and/or survival of postnatal Müller glial cells. J. Comp. Neurol. 510:237–250, 2008. © 2008 Wiley‐Liss, Inc.
Variable‐Temperature Infrared Spectroscopy Studies on the Thermodynamics of CO Adsorption on the Zeolite Ca–Y
Authors: Bonelli Barbara , Areán Carlos Otero , Armandi Marco , Delgado Montserrat Rodríguez , Garrone Edoardo 
Published: July 2008

AbstractVariable temperature FT–IR spectroscopy (in the range of 298–380 K) is used to study the thermodynamics of formation of Ca2+⋅⋅⋅CO carbonyl species upon CO adsorption on the faujasite‐type zeolite Ca–Y, and also the (temperature‐dependent) isomerization equilibrium between carbonyl and isocarbonyl (Ca2+⋅⋅⋅OC) species. The standard enthalpy and entropy changes involved in formation of the monocarbonyl species resulted to be ΔH0=−50.3 (±0.5) kJ mol−1 and ΔS0=−186 (±5) J mol−1 K−1, respectively. Isomerization of the (C‐bonded) Ca2+⋅⋅⋅CO carbonyl to yield the (O‐bonded) Ca2+⋅⋅⋅OC isocarbonyl involves an enthalpy change ${\Delta {\it H}_{{\rm{iso}}}^{\rm{0}} }$=+11.4 (±1.0) kJ mol−1. These results are compared with previously reported data for the CO/Sr–Y system; and also, a brief analysis of enthalpy–entropy correlation for CO adsorption on zeolites and metal oxides is given.
The complexity of CTBT verification. Taking noble gas monitoring as an example
Authors: Kalinowski Martin B. , Becker Andreas , Saey Paul R. J. , Tuma Matthias P. , Wotawa Gerhard 
Published: July 2008

AbstractVerification of the Comprehensive Nuclear‐Test‐Ban Treaty is a complex undertaking. A monitoring system comprising a global network of 321 seismic, hydroacoustic, infrasound and radionuclide stations is used to detect signals that could indicate a possible nuclear explosion. This system daily sends more than 10 GB of raw data to the Vienna based International Data Centre for further processing and analysis to answer a simple question: have any indications for a possible nuclear explosion been sensed? We will focus on the 40 stations in charge for global radioxenon monitoring and discuss the complexity of solving the nuclear source attribution problem. © 2008 Wiley Periodicals, Inc. Complexity, 2008.
Rational Design of Solid Catalysts for the Selective Use of Glycerol as a Natural Organic Building Block
Authors: Jérôme François , Pouilloux Yannick , Barrault Joël 
Published: July 2008

AbstractGlycerol is the main co‐product of the vegetable oils industry (especially biodiesel). With the rapid development of oleochemistry, the production of glycerol is rapidly increasing and chemists are trying to find new applications of glycerol to encourage a better industrial development of vegetable oils. In this Review, attention is focused on the selective use of glycerol as a safe organic building block for organic chemistry. An overview is given of the different heterogeneous catalytic routes developed by chemists for the successful and environmentally friendly use of glycerol in sustainable organic chemistry. In particular, the effects of different catalyst structural parameters are discussed to clearly highlight how catalysis can help organic chemists to overcome the drawbacks stemming from the use of glycerol as a safe organic building block. It is shown that heterogeneous catalysis offers efficient routes for bypassing the traditional use of highly toxic and expensive epichlorohydrin, 3‐chloro‐1,2‐propanediol, or glycidol, which are usually used as a glyceryl donor in organic chemistry.
A novel low‐power receiver topology for RF and microwave applications
Authors: Zito Domenico 
Published: July 2008

AbstractA novel low‐power receiver topology for radio‐frequency and microwave applications is presented. The proposed solution exploits a simple connection between the low‐noise amplifier and the subsequent mixer, which is realized by means of a high‐value resistor and a current mirror, achieving low noise and high linearity performance with an extremely low power consumption. The criteria for its optimal design are derived in order to accomplish the main trade‐offs among noise figure (NF), linearity, and current consumption performance.As a case of study, the new topology has been designed in the case ofI/Qdirect conversion receiver for IEEE 802.15.4 standard (ZigBee) applications at 2.45 GHz. The receiver exhibits a NF of 8.7 dB, 50Ω input impedance, a voltage gain of 26 dB, an input‐referred third‐order intercept point of −13 dBm, and a power consumption of 8.6 mW, which represent one of the best performance trade‐offs obtained in the literature. Copyright © 2008 John Wiley & Sons, Ltd.
A 10 b 25 MS/s 4.8 mW 0.13 µm CMOS ADC with switched‐bias power‐reduction techniques
Authors: Choi Hee‐Cheol , Kim Young‐Ju , Lee Kyung‐Hoon , Kim Younglok , Lee Seung‐Hoon 
Published: July 2008

AbstractThis paper proposes a 10 b 25 MS/s 4.8 mW 0.13 µm CMOS analog‐to‐digital converter (ADC) for high‐performance portable wireless communication systems, such as digital video broadcasting, digital audio broadcasting, and digital multimedia broadcasting (DMB) systems, simultaneously requiring a low‐voltage, low‐power, and small chip area. A two‐stage pipeline architecture optimizes the overall chip area and power dissipation of the proposed ADC at the target resolution and sampling rate, while switched‐bias power‐reduction techniques reduce the power consumption of the power‐hungry analog amplifiers. Low‐noise reference currents and voltages are implemented on chip with optional off‐chip voltage references for low‐power system‐on‐a‐chip applications. An optional down‐sampling clock signal selects a sampling rate of 25 or 10 MS/s depending on applications in order to further reduce the power dissipation. The prototype ADC fabricated in a 0.13 µm 1P8M CMOS technology demonstrates a measured peak differential non‐linearity and integral non‐linearity within 0.42 LSB and 0.91 LSB and shows a maximum signal‐to‐noise‐and‐distortion ratio and spurious‐free dynamic range of 56 and 65 dB at all sampling frequencies up to 25 MHz, respectively. The ADC with an active die area of 0.8 mm2consumes 4.8 and 2.4 mW at 25 and 10 MS/s, respectively, with a 1.2 V supply. Copyright © 2008 John Wiley & Sons, Ltd.
Pseudo‐Octahedral Schiff Base Nickel(II) Complexes: Does Single Oxidation Always Lead to the Nickel(III) Valence Tautomer?
Authors: Rotthaus Olaf , Labet Vanessa , Philouze Christian , Jarjayes Olivier , Thomas Fabrice 
Published: July 2008

AbstractWith the aim of establishing correlations between the ligand structure and the oxidation site in nickel complexes from Schiff base ligands, five ligands and their nickel complexes have been synthesized. The prototypical asymmetric Schiff base ligand HL1 contains both phenol and pyridine pendant arms with a pivotal imine nitrogen atom. Ligands HL2–5 differ from HL1 by either their phenolate para substituent, the hybridization of the pivotal nitrogen atom, and/or the N‐donor properties of the pyridine moiety. The five complexes [Ni(L1–5)2] are obtained by treating the corresponding ligands with 0.5 equiv. of Ni(OAc)2·4H2O in the presence of NEt3. X‐ray crystal‐structure diffraction studies as well as DFT calculations reveal that [Ni(L1–5)2] involves a high‐spin nickel(II) ion within a pseudo‐octahedral geometry. The two ligands are arranged in a meridional fashion when the pivotal nitrogen atom is an imine {as in [Ni(L1–2)2] and [Ni(L4–5)2]}, while the fac isomer is preferred in [Ni(L3)2] (amino pivotal nitrogen atom). [Ni(L1)2] is characterized by an oxidation potential at –0.17 V vs. Fc+/Fc. The one‐electron‐oxidized species [Ni(L1)2]+ exhibits an EPR signal at g = 2.21 attributed to a phenoxyl radical that is antiferromagnetically coupled to a high‐spin NiII ion. [Ni(L2)2] differs from [Ni(L1)2] by the phenolate para substituent (a tert‐butyl instead of the methoxyl group) and exhibits an oxidation potential that is ca. 0.16 V higher. Compared to [Ni(L1)2]+ the cation [Ni(L2)2]+ exhibits a SOMO that is more localized on the metal atom. The EPR and electrochemical signatures of [Ni(L3)2]+ are similar to those of [Ni(L1)2]+, thus showing that an imino to amino substitution compensates for a methoxy to tert‐butyl one. Replacement of the pyridine by a quinoline group in [Ni(L4–5)2] makes the complexes slightly harder to oxidize. The EPR signatures of the cations [Ni(L4–5)2]+ are roughly similar to those of the pyridine analogs [Ni(L1–2)2]+. The oxidation site is thus not significantly affected by changes in the N‐donor properties of the terminal imino nitrogen atom.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
A Mixed‐Valence [MnIIMnIIIMnII] Complex of a Linear Phenol–bis(pyrazole) Ligand with an S = 3 Spin Ground State
Authors: Barrios Leoní A. , Aromí Guillem , Ribas Joan , Salinas Uber Jorge , Roubeau Olivier , Sakai Ken , Masaoka Shigeyuki , Gamez Patrick , Reedijk Jan 
Published: July 2008

AbstractA novel ligand featuring one phenol and two pyrazole groups in a linear fashion was prepared. This donor facilitates the assembly of a mixed‐valence chain of Mn ions in the[MnIIMnIIIMnII] sequence, with formula [Mn3(Hpbpz)2(OAc)3(MeOH)3] (1). Complex 1 exhibits dominant antiferromagnetic coupling between adjacent pairs of Mn ions. A fit of the magnetic susceptibility data using the Hamiltonian H = –2J1(S1S2 + S2S3) – 2J2(S1S3) yields coupling constants of J1 = –3.14 cm–1 and J2 = –0.39 cm–1, which leads to a spin ground state of ST = 3. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Example of Disulfide Conformational Change in the Solid State: Preparation, Optical Properties, and X‐ray Studies of a Cystamine‐Based Iodoplombate Hybrid
Authors: Louvain Nicolas , Mercier Nicolas , Luc Jerôme , Sahraoui Bouchta 
Published: July 2008

AbstractA novel cystamine‐based hybrid, namely, α‐[{NH3(CH2)2SS(CH2)2NH3}PbI6]·2H3O (1a), was prepared under solvothermal conditions. Interestingly, 1a, which is built up from isolated PbI6 octahedra, can be easily changed into its polymorph, namely, β‐[{NH3(CH2)2S–S(CH2)2NH3}PbI6]·2H3O (1b) only by heating it up to 45 °C. According to the results of X‐ray diffraction analyses, the polymorphic phenomenon of 1a and 1b results from a conformational change in the helical diprotonated cystamine cation in the solid state. Both 1a and 1b crystallized in the orthorhombic Pna21 space group. The reversibility of this transformation is proved by single‐crystal X‐ray diffraction and second harmonic generation measurements.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
DFT Study of Brønsted Acid Catalyzed Nitroso Aldol Reaction Between Achiral Enamines and Nitrosobenzene: The Reason for Regio‐ and Enantioselectivity
Authors: Akakura Matsujiro , Kawasaki Masanori , Yamamoto Hisashi 
Published: July 2008

AbstractThe regio‐ and enantioselectivity of the nitroso aldol reaction between achiral enamines and nitrosobenzene catalyzed by chiral Brønsted acid catalysts (TADDOL or 1‐naphthylglycolic acid) were investigated in experimental and theoretical studies. The use of a model involving a simple organic acid (MeOH or AcOH) revealed that the reaction was catalyzed by two or more molecules of the organic acid and that the transition‐state structure encompassed several hydrogen bonds. The role of hydrogen bonding in the regioselectivity was also examined carefully. The enantioselectivity in the reaction catalyzed by chiral organic acids (S,S)‐TADDOL and (S)‐1‐naphthylglycolic acid was also confirmed through computational study.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Electrochemical Synthesis of Chitosan‐co‐polyaniline/WO3⋅nH2O Composite Electrode for Amperometric Detection of NO2 Gas
Authors: Tiwari Ashutosh , Gong Shaoqin 
Published: July 2008

AbstractAn electrode of hydrated tungsten oxide (WO3⋅nH2O) embedded chitosan‐co‐polyaniline (CHIT‐co‐PANI) composite was electrochemically prepared on an indium tin oxide (ITO) coated glass surface using mineral acid as a supporting electrolyte. The resulting CHIT‐co‐PANI/WO3⋅nH2O/ITO electrode was characterized using ultraviolet‐visible spectroscopy (UV‐vis), Fourier transform infrared spectroscopy (FTIR), cyclic voltammetry (CV), and scanning electron microscopy (SEM). The composite electrode exhibited a three‐dimensional nanofibrous structure with the diameter of the nanofibers ranging from 20 to 100 nm. The CHIT‐co‐PANI/WO3⋅nH2O/ITO electrode allowed for the low potential detection of NO2 gas in acidic medium. The NO2 gas sensing characteristics were studied by measuring change in the current with respect to concentration and time. Using the CHIT‐co‐PANI/WO3⋅nH2O/ITO electrode, NO2 gas was detected electrochemically without interference at pH 2.0 and 0.25 V vs. Ag/AgCl. The current of the electrochemical cell with the CHIT‐co‐PANI/WO3⋅nH2O/ITO electrode decreased linearly with an increase in NO2 gas concentration in a range from 100 to 500 ppb with a response time of eight seconds.