bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Growth and Characterization of Electrodeposited Na0.45VOPO4·1.58H2O Materials.
Authors: Bououd S. , El Hourch A. , El Kacemi K. , Guessous A. , Pradel A. , Ribes M. 
Published: February 2012

AbstractThe title compound is prepared by electrochemical oxidation of VOSO4 in 1M H3PO4 solution to produce a deposit onto a Pt electrode (25 or 60 °C, pH 1.9—2.0 adjusted with NaOH, 1.5 or 1.7 V vs.
ChemInform Abstract: An Unprecedented Silver‐Decavanadate Dimer Investigated Using Ion‐Mobility Mass Spectrometry.
Authors: McGlone Thomas , Thiel Johannes , Streb Carsten , Long De‐Liang , Cronin Leroy 
Published: February 2012

Abstract{(Ag(MeCN)3)3 [H3V10O28]·MeCN}2 is synthesized by reaction of (Bu4N)3[H3V10O28] and AgNO3 in MeCN (24 h) followed by diffusion of diethyl ether into the reaction mixture (4 d, 40% yield).
ChemInform Abstract: Oxidative Nucleophilic Substitution: Transformation of Alkylboronic Derivatives.
Authors: Cazorla Clement , Metay Estelle , Lemaire Marc 
Published: February 2012

AbstractTh Cu2+/BF3·OEt2‐mediated reaction of alkyltrifluoroborate salts with nitriles provides access towards a wide variety of amides (III) and (VI) in moderate to good yields.
ChemInform Abstract: Dicyclopentyl Azodicarboxylate (DCpAD): A New Alternative Azo‐Reagent for the Mitsunobu Reaction.
Authors: Yang Jian Hai , Dai Li Yan , Wang Xiao Zhong , Chen Ying Qi 
Published: February 2012

AbstractThe reactivity of DCAD is comparable to DEAD but is shows significantly improved stability and can be stored at room temperature.
ChemInform Abstract: Synthesis of Unsymmetrical Alkyl Acetals via Addition of Primary Alcohols to Allyl Ethers Mediated by Ruthenium Complexes.
Authors: Krompiec Stanislaw , Penkala Mateusz , Kowalska Ewelina , Penczek Robert , Bujak Piotr , Danikiewicz Witold , Spolnik Grzegorz , Kita Andrzej , Grudzka Iwona 
Published: February 2012

AbstractThe synthesis of unsymmetrical alkyl acetals via addition of primary alcohols to allyl ethers mediated by various ruthenium complexes is described.
ChemInform Abstract: Convenient and Mild Synthesis of Nitroarenes by Metal‐Free Nitration of Arylboronic Acids.
Authors: Wu Xiao‐Feng , Schranck Johannes , Neumann Helfried , Beller Matthias 
Published: February 2012

AbstractThe presented simple protocol for the synthesis of the compounds (II), which uses the inexpensive reagent tBu—O—NO does not work for phenylboronic acids bearing a vinyl‐ or a hydroxy‐group.
ChemInform Abstract: Novel and Selective Method for the Aerobic Oxidation of Benzylic Alcohols in the Absence of Metal Catalyst.
Authors: Shi Shenyi , Kong Aiguo , Zhao Xinhua , Shan Yongkui 
Published: February 2012

AbstractThe chemoselective metal‐free aerobic oxidation of benzylic alcohols is accomplished using pyridinium nitrate as ionic liquid catalyst under solvent‐free conditions.
ChemInform Abstract: A Mild and Efficient Synthesis of Aryl Sulfones from Aryl Chlorides and Sulfinic Acid Salts Using Microwave Heating.
Authors: Yuan Yan‐qin , Guo Sheng‐rong 
Published: February 2012

AbstractA CuCl‐catalyzed reaction of aryl and hetaryl halides with sulfinic acid salts is developed to yield a variety of sulfones (III) (41 examples).
ChemInform Abstract: Formation of Novel 1,2,3,4‐Tetrasubstituted 3‐Pyrrolines via Cyclization of γ‐Halo‐β‐ketoesters with Aromatic Amines and Aldehydes.
Authors: Cekavicus Brigita , Kore Kintija , Jakovele Liva , Plotniece Aiva , Pajuste Karlis , Petrova Marina , Belyakov Sergey , Sobolev Arkadij 
Published: February 2012

AbstractOptimized conditions are elaborated which allow the synthesis of highly substituted title compounds in the absence of any catalyst.
ChemInform Abstract: Efficient and Convenient C‐3 Functionalization of Indoles Through Ce(OAc)3/TBHP‐Mediated Oxidative C—H Bond Activation in the Presence of β‐Cyclodextrin.
Authors: Hu Yu Lin , Jiang Hui , Lu Ming 
Published: February 2012

AbstractThe oxidative C—H activation of indoles (I) with different alkenes and ketones in the presence of Ce(O‐Ac)3 and β‐cyclodextrin as catalytic system proceeds regioselectively in H2O to afford a variety of 3‐substituted indoles in good yields.
ChemInform Abstract: Poly(4‐vinylpyridine)‐supported Sulfuric Acid: An Efficient Solid Acid Catalyst for the Synthesis of Coumarin Derivatives under Solvent‐Free Conditions.
Authors: Borah Kalyan Jyoti , Borah Ruli 
Published: February 2012

AbstractPoly(4‐vinylpyridine)‐supported sulfuric acid is shown to be an efficient catalyst for the synthesis of coumarin derivatives under solvent‐free conditions.
ChemInform Abstract: Regioselective Synthesis of Chromeno[4′,3′:4,5]pyrano[3,2‐c][1,8]naphthyridin‐13‐one Derivatives by Domino Knoevenagel—Hetero‐Diels—Alder Reactions.
Authors: Majumdar K. C. , Taher Abu , Ponra Sudipta 
Published: February 2012

AbstractUnder optimized conditions, the reactions of naphthyridinone (I) with O‐allylated or propargylated salicyclaldehydes gives the title compounds with high regio‐ and stereoselectivity.
ChemInform Abstract: Cu(ClO4)2·6H2O as an Efficient Catalyst for the Synthesis of 3,4‐Dihydropyrimidin‐2(1H)‐ones under Solvent‐Free Conditions.
Authors: Lei Min , Ma Lei , Hu Lihong 
Published: February 2012

AbstractCupric perchlorate efficiently catalyzes the Biginelli reaction under solvent‐free conditions.
ChemInform Abstract: Well‐Dawson Type Polyoxometalates of 3d Series and Their Industrial Use as Eco‐Friendly and Green Catalysts in Organic Reactions.
Authors: Dey K. C. , Sharma V. 
Published: February 2012

AbstractWell—Dawson mixed heteropolyoxometalates catalyze the condensation of o‐phenylenediamines with acetyl chloride furnishing benzoxadiazipine or benzimidazole derivatives depending on the substitution pattern of the diamine.
ChemInform Abstract: Oxidative Transition‐Metal‐Free Cross‐Coupling of Secondary Phosphine Chalcogenides and Alcohols or Phenols: A Facile, Expedient Synthesis of Phosphinochalcogenoic O‐Esters.
Authors: Gusarova Nina K. , Volkov Pavel A. , Ivanova Nina I. , Larina Ludmila I. , Trofimov Boris A. 
Published: February 2012

AbstractVarious oxides, sulfides, and selenides are coupled with alcohols using CCl4/Et3N as reagent combination under mild conditions.
ChemInform Abstract: An Alternative Approach for the Synthesis of Aryl—Alkyl Tellurides: Reaction of Aryl Iodides with Metal Alkyltellurolates Promoted by CuI.
Authors: Silva Marcio S. , Comasseto Joao V. 
Published: February 2012

AbstractThe title reaction tolerates a wide range of functional groups at the aryl iodides.
ChemInform Abstract: Environmentally Benign Preparation of Benzylidene Acetal of Carbohydrate Derivatives in PEG 600.
Authors: Sau Abhijit , Misra Anup Kumar 
Published: February 2012

AbstractAn eco‐friendly reaction protocol allows the preparation of benzylidene acetals (III) of carbohydrate derivatives such as (I) in the presence of a heterogeneous catalyst that replaces hazardous, moisture‐sensitive acid catalysts, and by use of a biodegradable solvent.
ChemInform Abstract: Discovery of a Potent and Orally Available Acyl‐CoA: Cholesterol Acyltransferase Inhibitor as an Antiatherosclerotic Agent: (4‐Phenylcoumarin)acetanilide Derivatives.
Authors: Ogino Masaki , et al. et al. 
Published: February 2012

AbstractStructure‐activity relationship studies lead to the discovery of compound (I), which shows potent ACAT inhibitory activity (IC50 = 12 nM) and good pharmacokinetic profile in mice.
ChemInform Abstract: Novel Paramagnetic AT1 Receptor Antagonists.
Authors: Tan Nichole P. H. , Taylor Michelle K. , Bottle Steven E. , Wright Christine E. , Ziogas James , White Jonathan M. , Schiesser Carl H. , Jani Nitya V. 
Published: February 2012

AbstractTitle compounds (I) bearing nitroxides are prepared and their pharmacology is evaluated.
ChemInform Abstract: Recent Highlights in the Use of Lanthanide‐Directed Synthesis of Novel Supramolecular (Luminescent) Self‐Assembly Structures such as Coordination Bundles, Helicates and Sensors.
Authors: Lincheneau Christophe , Stomeo Floriana , Comby Steve , Gunnlaugsson Thorfinnur 
Published: February 2012

AbstractReview: 94 ref.
Estimation of Organic Pesticide Residues in Wines of Moldova
Authors: Duca Gheorghe , Sturza Rodica , Siretanu Ludmila 
Published: February 2012

AbstractThis paper presents the study of pesticide residues in Moldovan wine products originating from traditional agriculture because the appreciation of these compounds is an important aspect of food safety. During 2007–2010, about 3000 analyses of wine samples using GC‐MS were investigated. Persistent organic pollutants (POPs), i.e., α‐, β‐, γ‐HCH, aldrine, and heptachlor were not found in any of the samples. Insignificant quantities of metalaxyl and mefenoxam were found in some wine samples. The missing of POPs in wine products represents an important quality feature. The study showed that if growers comply with rules of phytosanitary treatments and the waiting period is respected, the content of pesticide residues can be reduced to safe limits. Also, the list of approved pesticides must be regularly revised, taking into account the degree of toxicity. Additionally, growers are to be constantly informed about effectuated changes.
Modeling the Effects of Meteorological Factors on SO2 and PM10 Concentrations with Statistical Approaches
Authors: Özbay Bilge 
Published: February 2012

AbstractAir quality has been deteriorated seriously in urban areas as a result of increasing anthropogenic activities. Meteorological conditions affect air pollution levels in the urban atmosphere significantly due to their important role in transport and dilution of the pollutants. This paper aims to investigate usability of some promising statistical methods for examining the impacts of metrological factors on SO2 and PM10 levels. Data were collected from city centre of Kocaeli in winter periods from 2007 to 2010 as pollutant concentrations increase in winters due to expanding combustion facilities. Results of bivariate correlation analysis showed that humidity and rainfall have remarkable negative correlations with the pollutants. Multiple linear regression models and artificial neural network (ANN) models were used to predict next day's PM10 and SO2 levels. In regression models calculated R2 values were 0.89 and 0.75 for PM10 and SO2, respectively. Among the various architectures, single layer networks provided better performance in ANN applications. Highest R2 values were obtained as 0.89 and 0.69 for PM10 and SO2, respectively, by using appropriate networks.
New Nuclear‐Spin‐Induced Cotton–Mouton Effect in Fluids at High DC Magnetic Field
Authors: Yao Guo‐hua , He Ming , Chen Dong‐ming , He Tian‐jing , Liu Fan‐chen 
Published: February 2012

AbstractBased on Buckingham and Pople’s theory of magnetic double refraction, a theoretical expression is derived for a new Cotton–Mouton effect ${\phi _{{\rm{C}} - {\rm{M}}}^{(IB)} }$ in liquid induced by the crossed effect between the high dc magnetic field B0 and the nuclear magnetic moment ${m_z^{(I)} }$. It contains temperature‐independent and ‐dependent parts. The latter is proportional to the product between anisotropy of polarizability and the nuclear magnetic shielding tensor. For this new effect ${\phi _{{\rm{C}} - {\rm{M}}}^{(IB)} }$, its order in magnitude for a molecule with large polarizability anisotropy is estimated to be comparable to the nuclear‐spin‐induced optical Faraday rotation (NSOFR). In the multipass approach, ${\phi _{{\rm{C}} - {\rm{M}}}^{(IB)} }$ can be eliminated by time‐reversal symmetry arguments, but NSOFR is enhanced.
Probing the Local Polarity of Alkylammonium Formate Ionic Liquids and Their Mixtures with Water by Using a Carbonyl Carotenoid
Authors: Ekimova Maria , Fröhlich Dirk , Stalke Sebastian , Lenzer Thomas , Oum Kawon 
Published: February 2012

AbstractUltrafast transient absorption experiments have been carried out to determine the local polarity of three alkylammonium formate (AAF) protic ionic liquids (PILs), methlyammonium formate (MAF), ethylammonium formate (EAF), and n‐butylammonium formate (BAF), by using 12′‐apo‐β‐carotenoic‐12′‐acid (12′CA) as a molecular probe. MAF is more polar than methanol; EAF and BAF have polarities similar to ethanol and n‐butanol, respectively. In general, the AAF PILs follow rather closely the correlation between the S1/intramolecular charge‐transfer (ICT) state lifetime and the polarity parameter Δf, which was previously established in organic solvents. This is in contrast to earlier results for the 12′CA probe in imidazolium‐based ILs, in which the local polarity determined by the probe was much larger than that for dipolar organic solvents with the same dielectric constant. The systematic variation of the composition of EAF/water mixtures shows no indication of significant deviations from the local to the bulk composition. We also characterized the photophysical properties of the deprotonated form of the 12′CA probe. It exhibits a structured S0→S2 absorption spectrum, which is blueshifted relative to neutral 12′CA. The lifetime of the S1/ICT state of the anion is about 170 ps, and therefore, similar to the lifetime of 12′CA in less polar solvents. The transient S1/ICT spectrum in methanol closely resembles that of nonpolar carotenes. Both observations suggest that the ICT character of the S1 state of the anion is largely suppressed because the shift of electron density toward the negatively charged carboxylate group is not favorable.
Wall properties and heat transfer analysis of the peristaltic motion in a power‐law fluid
Authors: Hayat T. , Javed M. , Asghar S. , Hendi A. A. 
Published: February 2012

SUMMARYA mathematical analysis has been carried out to investigate the effect of elasticity of the flexible walls on the peristaltic flow of a power‐law fluid. The heat transfer analysis is further examined. Expressions of stream function, velocity, and temperature distributions are presented in closed form under long wavelength and low Reynolds number approximations. The effects of the various parameters entering into the mathematical analysis are sketched and discussed. Copyright © 2012 John Wiley & Sons, Ltd.
Highly Acetylated Lanostane‐Type Triterpenoids from Coprinus cinereus 120
Authors: Liu Yuan‐Zhen , Li Yao‐Yao , Sun Yi‐Fei , Zheng Zhong‐Hui , Song Si‐Yang , Su Wen‐Jin , Shen Yue‐Mao 
Published: February 2012

AbstractTwo new highly acetylated lanostane‐type triterpenoids, coprinacin A (1) and coprinacin B (2), were isolated from the basidiomycetous strain Coprinus cinereus 120. The chemical structures of 1 and 2 were elucidated by spectroscopic analyses, including 1D‐ and 2D‐NMR experiments and FT‐ICR‐MS, and their in vitro cytotoxic activities against the human‐tumor cell line HeLa were established as modest.
Five New Tetranortriterpenoids from the Seeds of Toona ciliata
Authors: Jiang Si‐Yuan , Liu Jie‐Qing , Xia Jian‐Jun , Yan Yu‐Xin , Qiu Ming‐Hua 
Published: February 2012

AbstractFive new tetranortriterpenoids, toonaciliatones B–F (1–5, resp.), together with four known compounds, dihydrocedrelone (6), cedrelone (7), 6α‐acetoxyazadirone (8), and 6α‐acetoxy‐14β,15β‐epoxyazadirone (9), were isolated from the seeds of Toona ciliata. Their structures were elucidated by spectroscopic methods, including 1D‐ and 2D‐NMR spectroscopy.
A Functionalized Spiro[chlorin‐porphyrin]‐Type ‘Dimer’ Dizinc Complex from Rapid [4+2] Self‐cycloaddition of a Conjugated [β,β′‐Bis(methylene)porphyrinato]zinc
Authors: Banala Srinivas , Sintic Paul , Kräutler Bernhard 
Published: February 2012

AbstractThermal extrusion of SO2 from β,β′‐sulfolenoporphyrins is an effective method for in situ generation of β,β′‐bis(methylene)porphyrin which remained unobserved in typical synthetic applications but underwent quickly efficient [4+2]‐cycloaddition reactions with dienophiles.We now report the thermal extrusion of SO2 from the symmetrical (tetra‐β,β′‐sulfolenoporphyrinato)zinc 1⋅Zn in the absence of a dienophile (Scheme). In the event, the thermally in situ generated conjugated diene underwent a [4+2] self‐cycloaddition, to give the {spirobi[tri‐β,β′‐sulfolenoporphyrinato]}dizinc 4⋅2Zn. This chiral (racemic) spirobiporphyrinoid dizinc complex represents the combination of the closely positioned and interacting chromophores of a (porphyrinato)zinc and of a (β‐methylene‐β,β′‐dihydroporphyrinato)zinc. It carries six sulfoleno moieties that are still available for further SO2 extrusion and cycloaddition reactions.
Age‐related proteomic changes in the subventricular zone and their association with neural stem/progenitor cell proliferation
Authors: McGinn Melissa J. , Colello Raymond J. , Sun Dong 
Published: February 2012

AbstractIn the mammalian central nervous system, generation of new neurons persists in the subventricular zone (SVZ) throughout life. However, the capacity for neurogenesis in this region declines with aging. Recent studies have examined the degree of these age‐related neurogenic declines and the changes of cytoarchitecture of the SVZ with aging. However, little is known about the molecular changes in the SVZ with aging. In this study, we dissected the SVZs from rats aged postnatal day 28, 3 months, and 24 months. The SVZ tissues were processed for 2‐D gel electrophoresis to identify protein changes following aging. Protein spots were subsequently subjected to mass spectrometry analysis to compare age‐related alterations in the SVZ proteome. We also examined the level of cell proliferation in the SVZ in animals of these three age groups by using bromodeoxyuridine labeling. We found significant age‐related changes in the expression of several proteins that play critical roles in the proliferation and survival of neural stem/progenitor cells in the SVZ. Among these proteins, glial fibrillary acidic protein, ubiquitin carboxy terminal hydrolase 1, glutathione S‐transferase omega, and preproalbumin were increased with aging, whereas collapsin response‐mediated protein 4 (CRMP‐4), CRMP‐5, and microsomal protease ER60 exhibited declines with aging. We have also observed a significant decline of neural stem/progenitor cell proliferation in the SVZ with aging. These alterations in protein expression in the SVZ with aging likely underlie the diminishing proliferative capacity of stem/progenitor cells in the aging brain. © 2012 Wiley Peridicals, Inc.
Hyposmia and cognitive impairment in Gaucher disease patients and carriers
Authors: McNeill Alisdair , Duran Raquel , Proukakis Christos , Bras Jose , Hughes Derralyn , Mehta Atuhl , Hardy John , Wood Nicholas W. , Schapira Anthony H.V. 
Published: February 2012

AbstractThe objective of this study was to assess a cohort of Gaucher disease patients and their heterozygous carrier relatives for potential clinical signs of early neurodegeneration. Gaucher disease patients (n = 30), heterozygous glucocerebrosidase mutation carriers (n = 30), and mutation‐negative controls matched by age, sex, and ethnicity (n = 30) were recruited. Assessment was done for olfactory function (University of Pennsylvania Smell Identification Test), cognitive function (Mini‐Mental State Examination, Montreal Cognitive Assessment), rapid eye movement sleep disorder, autonomic symptoms, and parkinsonian motor signs (Unified Parkinson's Disease Rating Scale part III, Purdue pegboard). Olfactory function scores were significantly lower in Gaucher disease patients (P = .010) and heterozygous carriers (P < .001) than in controls. Cognitive assessment scores were significantly lower in Gaucher disease patients (P = .002) and carriers (P = .002) than in controls. Unified Parkinson's Disease Rating Scale motor subscale scores were significantly higher in Gaucher disease patients (P < .001) and heterozygotes (P = .0010) than in controls. There was no difference in scores for symptoms of rapid eye movement sleep disorder or autonomic dysfunction. Impairment of olfaction, cognition, and parkinsonian motor signs occurs more frequently in Gaucher disease patients and carriers than in controls, which may indicate the early stages of neurodegeneration. © 2012 The Authors. International Parkinson and Movement Disorder Society published by Wiley Periodicals, Inc.
Global Existence and blowup phenomenon for a 1D radiation hydrodynamics model problem
Authors: Rohde Christian , Xie Feng 
Published: February 2012

We consider the global existence of classical solutions and blowup phenomena for a spatially one‐dimensional radiation hydrodynamics model problem, which consists of a scalar Burgers‐type equation coupled with a nonlocal advection‐reaction equation for radiation intensity. The model can be seen as an extension of the well‐known Hamer model that includes additionally the effects of scattering.It is well‐known that the initial value problem for Burgers' equation cannot be solved classically as soon as the derivative of the initial datum is negative somewhere. For our model problem, there is a critical negative number such that if the spatial derivative of the initial function is larger than this number, the associated initial‐value problem admits a global classical solution. However, when the spatial derivative of the initial data is below another negative threshold number, the initial value problem can also not be solved classically. Moreover, when there does not exist a global classical solution, it is shown that the first spatial derivative of solution must blow up in finite time. The results of the paper generalize the findings of Kawashima and Nishibata for the Hamer model. Copyright © 2012 John Wiley & Sons, Ltd.
Study on an epsilon‐negative zeroth‐order resonator antenna properties for mobile handsets
Authors: Kim Jeongpyo 
Published: February 2012

AbstractIn this letter, we study on an epsilon‐negative zeroth‐order resonator (ENG ZOR) antenna properties for mobile handsets, such as impedance bandwidth, radiation efficiency, and so on.An ENG ZOR consists of two shunt inductors for epsilon‐negative property and a patch between two inductors for right‐handed property. The zeroth order resonant frequency of the ENG ZOR is fixed by two shunt inductors and shunt equivalent capacitor between a patch and a ground. Therefore, when the size of the patch is increased, the values of the shunt inductors are decreased to fix the resonant frequency. The bandwidth and radiation efficiency of the designed ENG ZOR antenna is experimentally analyzed by adjusting the size of the patch between two inductors. Details of the antenna characteristics are described, and both simulated and measured results of the designed antenna are presented. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1066–1069, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26673
Wavelength filter exploiting serially coupled ring resonators fabricated by a standard silicon CMOS technology
Authors: Kim Woo‐Ju , Lee Hak‐Soon , Kim Gun‐Duk , Lee Sang‐Shin , Lee Wan‐Gyu 
Published: February 2012

AbstractA photonic compact eight‐channel wavelength filter has been proposed and fabricated by incorporating serially connected ring resonators based on a silicon rib waveguide.Eight different rings are subsequently addressed by a common input bus and individually out‐coupled by output buses. A vertical grating coupler is attached to the input and output buses for efficient light coupling. Each of the launched optical signals is routed to the drop port of the corresponding channel, whose center wavelength is dependent on the size of the ring. The device was designed by using a finite‐difference time‐domain method and fabricated by exploiting a standard complementary metal‐oxide‐semiconductor silicon‐on‐insulator technology. The silicon rings, serially placed with a gap of 50 μm, have radii varying from 6.0 to 6.07 μm, leading to a channel wavelength ranging from 1546.3 to 1557.6 nm. As regards, the overall performance of the fabricated device, the quality factor is ∼13,600, the channel spacing ∼1.6 nm, the propagation loss ∼3 dB, and the channel crosstalk ∼27 dB. Finally, a group of optical signals modulated by a data signal at 3.2 Gbps were appropriately routed to yield a decent eye diagram. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:933–936, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26682