bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Structure Refinements of Members in the Brownmillerite Solid Solution Series Ca2Alx (Fe0.5Mn0.5)2‐xO5+δ with 1/2 ≤ x ≤ 4/3.
Authors: Stoeber Stefan , Redhammer Guenther , Schorr Susan , Prokhnenko Oleksandr , Poellmann Herbert 
Published: March 2013

AbstractThe title brownmillerite solid solutions are synthesized by a ceramic method starting with mixtures of CaCO3, Al2O3, Fe2O3, and MnO2 (Pt crucibles, 1250 °C, 8 d).
ChemInform Abstract: Pd‐Catalyzed Threefold Arylation of Baylis—Hillman Bromides and Acetates with Triarylbismuth Reagents.
Authors: Rao Maddali L. N. , Giri Somnath 
Published: March 2013

AbstractFunctionalized alkyl benzylacrylates and benzylacrylonitriles are synthesized by cross‐coupling of Baylis—Hillman bromides or acetates with triarylbismuth compounds under palladium‐catalyzed conditions.
ChemInform Abstract: A Novel Acid‐Catalyzed O‐Benzylating Reagent with the Smallest Unit of Imidate Structure.
Authors: Yamada Kohei , Fujita Hikaru , Kunishima Munetaka 
Published: March 2013

AbstractThe reagent (I) is easily synthesized from benzyl alcohol and cyanuric chloride as a stable, crystalline solid.
ChemInform Abstract: A Highly Efficient Synthesis of Dithiocarbamates in Green Reaction Media.
Authors: Azizi Najmadin , Gholibeglo Elham 
Published: March 2013

AbstractThree‐component condensation of epoxides, alkyl halides or α,β‐unsaturated carbonyl compounds with amines and carbon disulfide produces dithiocarbamates in good to excellent yields.
ChemInform Abstract: Kinetic Resolution in Chiral Phosphoric Acid Catalyzed Aldol Reactions: Enantioselective Robinson‐Type Annulation Reactions.
Authors: Yamanaka Masahiro , Hoshino Masaya , Katoh Takuya , Mori Keiji , Akiyama Takahiko 
Published: March 2013

AbstractThe present kinetic resolution of racemic Michael adduct (I) is catalyzed by a chiral phosphoric acid.
ChemInform Abstract: Three‐Component Oxytrifluoromethylation of Alkenes: Highly Efficient and Regioselective Difunctionalization of C=C Bonds Mediated by Photoredox Catalysts.
Authors: Yasu Yusuke , Koike Takashi , Akita Munetaka 
Published: March 2013

AbstractThe simple radical transformation, which uses a broad range of O‐nucleophiles, proceeds under mild conditions.
ChemInform Abstract: Highly Efficient Organosuperbase‐Catalyzed Mannich‐Type Reactions of Sulfonylimidates with Imines: Successful Use of Aliphatic Imines as Substrates and a Unique Reaction Mechanism.
Authors: Nakano Junya , Masuda Koichiro , Yamashita Yasuhiro , Kobayashi Shu 
Published: March 2013

AbstractThe organocatalyst is much more effective than DBU and can be applied to transformations of aliphatic and aromatic imines.
ChemInform Abstract: Effects of Phosphorus Substituents on Reactions of α‐Alkoxyphosphonium Salts with Nucleophiles.
Authors: Goto Akihiro , Otake Kazuki , Kubo Ozora , Sawama Yoshinari , Maegawa Tomohiro , Fujioka Hiromichi 
Published: March 2013

AbstractReactions of the phosphonium salts, generated in situ from acetals and tris(o‐tolyl)phosphine with various nucleophiles as water, cyanide and Grignard reagents are demonstrated.
ChemInform Abstract: Zinc‐Mediated Enantioselective Addition of Terminal 1,3‐Diyne to N‐Arylimines of Trifluoropyruvates.
Authors: Zhang Fa‐Guang , Ma Hai , Zheng Yan , Ma Jun‐An 
Published: March 2013

AbstractThe facile and effective reaction works well with a variety of substrates.
ChemInform Abstract: Preparation of Different Amides via Ritter Reaction from Alcohols and Nitriles in the Presence of Silica‐Bonded N‐Propyl Sulfamic Acid (SBNPSA) under Solvent‐Free Conditions.
Authors: Shakeri Maryam‐Sadat , Tajik Hassan , Niknam Khodabakhsh 
Published: March 2013

AbstractA clean and environmentally friendly synthesis of amides (III) using different benzylic or tertiary alcohols and different nitriles is presented.
ChemInform Abstract: Efficacious N‐Protection of O‐Aryl Sulfamates with 2,4‐Dimethoxybenzyl Groups.
Authors: Reuillon Tristan , Bertoli Annalisa , Griffin Roger J. , Miller Duncan C. , Golding Bernard T. 
Published: March 2013

AbstractThe protection‐deprotection strategy comprises reaction of phenols (I) with sulfonylbis(methylimidazole) (II) to provide aryl imidazole sulfonates (III), which are activated by reaction with trimethyloxonium tetrafluoroborate, before further reaction with the methoxy‐substituted dibenzylamine (IV) or (VII).
ChemInform Abstract: Dioxirane‐Mediated Heterogeneous Epoxidations with Potassium Caroate: A Solid Catalyst Bearing Anchored Ketone Moieties.
Authors: D'Accolti Lucia , Annese Cosimo , De Riccardis Alberto , De Giglio Elvira , Cafagna Damiana , Fanelli Fiorenza , Fusco Caterina 
Published: March 2013

AbstractThe hybrid material HSC, containing trifluoromethyl ketone moieties anchored on silica gel through a short spacer, is used in efficient heterogeneous epoxidations using potassium caroate.
ChemInform Abstract: A Ligand‐Free Copper(II)‐Catalyzed Three‐Component Reaction in Poly(ethylene glycol) Medium: A Versatile Protocol for the Preparation of Selected 3‐Indole Derivatives.
Authors: Chandrasekhar Srivari , Patro Vidyavathi , Reddy Gangireddy Pavan Kumar , Gree Rene 
Published: March 2013

AbstractThe process involves a Knoevenagel condensation followed by Michael addition to give a series of highly functionalized target compounds.
ChemInform Abstract: A Practical One Pot Synthesis of Novel 2‐Hydroxy‐4‐chromanone Derivatives from 3‐Formylchromone.
Authors: Siddiqui Zeba N. , Farooq Farheen 
Published: March 2013

AbstractThe simple and environmentally benign synthesis of the title compounds (III) proceeds under mild reaction conditions using water as solvent and Zn(L‐proline)2 as recyclable and non‐toxic catalyst.
ChemInform Abstract: Synthesis of 1,3,6‐Trioxygenated Prenylated Xanthone Derivatives as Potential Antitumor Agents.
Authors: Lim Chan K. , Tho Lai‐Yeng , Kim Yang M. , Shah Syed A. A. , Weber Jean‐Frederic F. 
Published: March 2013

Abstract11 New xanthone derivatives are prepared and screened as potential antitumor agents.
ChemInform Abstract: A Stereoselective Povarov Reaction Leading to exo‐Tetrahydroindolo[3,2‐c]quinoline Derivatives Catalyzed by Iodine.
Authors: Wang Xiang‐Shan , Yin Ming‐Yue , Wang Wei , Tu Shu‐Jiang 
Published: March 2013

AbstractSchiff bases generated in situ from aldehydes and aromatic/heteroaromatic amines react at room temperature with N‐unprotected indoles as dieneophiles to give the title fused polycycles as single stereoisomers.
ChemInform Abstract: One‐Pot Multicomponent Synthesis of Medicinally Important Purine Quinazolinone Derivatives.
Authors: Sawant Sanghapal D. , Srinivas Mahesuni , Reddy G. Lakshma , Rao V. Venkateswar , Singh Parvinder Pal , Vishwakarma Ram A. 
Published: March 2013

AbstractThe two‐step approach involves the reaction of substrates such as (I) or (V) with aromatic amines using PCl3 as cyclizing agent (< 95% cv.) followed by coupling of the resulting intermediates with adenine derivatives.
ChemInform Abstract: Interaction of 6‐Methoxy‐4,9‐dihydro‐3H‐β‐carboline with Mannich Bases.
Authors: Osyanin V. A. , Ivleva E. A. , Klimochkin Yu. N. 
Published: March 2013

AbstractReaction of the title carbolines with o‐quinone methides derived from Mannich bases of the naphthalene (II) or indole series (IV) gives 1,3‐oxazinopyridoindoles.
ChemInform Abstract: A Tandem Coupling/Smiles Rearrangement/Cyclization Approach to 1,4‐Benzooxazinones or 1,4‐Pyridooxazinones under Mild Conditions.
Authors: Zhan Chunjing , Jia Jiong , Yang Bingchuan , Huang Aiping , Liu Yanli , Ma Chen 
Published: March 2013

AbstractA simple protocol is developed for the reaction of 1,2‐dihalobenzenes or 2‐halonitroarenes with 2‐hydroxyacetamides to give benzoxazinone skeletons.
ChemInform Abstract: Stereocontrolled Facile Synthesis and Biological Evaluation of (3′S) and (3′R)‐3′‐Amino (and Azido)‐3′‐deoxy Pyranonucleosides.
Authors: Manta Stella , Parmenopoulou Vanessa , Kiritsis Christos , Dimopoulou Athina , Kollatos Nikolaos , Papasotiriou Ioannis , Balzarini Jan , Komiotis Dimitri 
Published: March 2013

AbstractA variety of 3′‐amino‐3′‐deoxypyranonucleosides and their 3′‐azide precursors are designed, synthesized and evaluated for their biological activities.
Particle Size Distribution Analysis of Chemical Oxygen Demand Fractions with Different Biodegradation Characteristics in Black Water and Gray Water
Authors: Hocaoglu Selda Murat , Orhon Derin 
Published: March 2013

AbstractThe study investigated the particle size distribution of major organic pollutants in black water and gray water fractions of domestic sewage. Particle size distribution was assessed by means of a filtration/ultrafiltration sequence together with laser diffraction. Emphasis was placed upon the correlation between the size distribution of chemical oxygen demand (COD) and its biodegradation characteristics obtained by respirometric analysis. Particle size distribution analysis provided specific fingerprints for COD, total organic carbon (TOC), carbohydrates, proteins, and color for black water and gray water: Aside from significant difference between COD contents, the more concentrated COD was predominantly in particulate form in black water, whereas soluble COD accounted for nearly 60% of the total in gray water. TOC and carbohydrate exhibited a similar pattern. Size distribution of particulate matter yielded different characteristics for the two fractions and indicated that settleable matter should be considered as a significant portion in assessing biodegradation. Particle size distribution of COD, although not directly related, gave an accurate image of biodegradation, indicating that particle size was basically the main parameter for differentiating and predicting major COD fractions with different biodegradation characteristics. It explained the dual hydrolysis mechanism associated with the black water based on the existence of a significant settleable COD fraction.
Sediment production and yield from an alluvial gully in northern Queensland, Australia
Authors: Shellberg Jeffrey G. , Brooks Andrew P. , Rose Calvin W. 
Published: March 2013

ABSTRACTSediment production, transport and yield were quantified over various timescales in response to rainfall and runoff within an alluvial gully (7 · 8 ha), which erodes into dispersible sodic soils of a small floodplain catchment (33 ha) along the Mitchell River, northern Australia. Historical air photographs and recent global positioning system (GPS) surveys and LiDAR data documented linear increases in gully area and volume, indicating that sediment supply has been relatively consistent over the historic period. Daily time lapse photography of scarp retreat rates and internal erosion processes also demonstrated that erosion from rainfall and runoff consistently supplied fine washload (< 63 µm) sediment in addition to coarse lags of sand bed material. Empirical measurements of suspended sediment concentrations (10 000 to >100 000 mg/L) and sediment yields (89 to 363 t/ha/yr) were high for both Australian and world data. Total sediment yield estimated from empirical washload and theoretical bed material load was dominated by fine washload (< 63 µm). A lack of hysteresis in suspended sediment rating curves, scarp retreat and sediment yield correlated to rainfall input, and an equilibrium channel outlet slope supported the hypothesis that partially or fully transport‐limited conditions predominated along the alluvial gully outlet channel. This is in contrast to sediment supply‐limited conditions on uneroded floodplains above gully head scarps. While empirical data presented here can support future modelling efforts to predict suspended sediment concentration and yield under the transport limiting situations, additional field data will also be needed to better quantify sediment erosion and transport rates and processes in alluvial gullies at a variety of spatial and temporal scales. Copyright © 2013 John Wiley & Sons, Ltd.
Modeling of double diffusive buoyant flow in a solar collector with water‐CuO nanofluid
Authors: Nasrin Rehena , Alim M.A. 
Published: March 2013

AbstractThe behavior of a prism‐shaped solar collector with a right triangular cross sectional area is investigated numerically. The water‐CuO nanofluid is taken as the functioning liquid through the solar collector. The leading differential equations with boundary conditions are solved by the penalty finite element method using Galerkin's weighted residual scheme. The performance of parameters in terms of temperature, mass, velocity distributions, radiative, convective heat and mass transfer, mean temperature and concentration of nanofluid, mid height horizontal‐vertical velocities, and sub‐domain average velocity field are investigated systematically. These parameters include the Rayleigh number Ra and the solid volume fraction φ. The outcome explains that the performance of the solar collector can be enhanced with the largest Ra and φ. The code validation shows excellent concurrence with the hypothetical outcome obtainable in the literature. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21039
Influence of heat transfer on the nonorthogonal stagnation point flow of a third‐order fluid towards a stretching surface
Authors: Nadeem S. , Mehmood Rashid , Sher Akbar Noreen 
Published: March 2013

AbstractThe present article looks at the theoretical analysis of a steady stagnation‐point flow with heat transfer of a third‐order fluid towards a stretching surface. The formulation of the problem has been carried out for a third order fluid and constructed partial differential equations are rehabilitated into ordinary differential equations. The consequential ordinary differential equations are solved analytically using the homotopy analysis method (HAM). Graphical illustrations are shown for various parameters involved in the flow equations. Numerical values of skin friction coefficients and heat flux are computed and presented through tables. © 2013 Wiley Periodicals, Inc. Heat Trans Asian Res; Published online in Wiley Online Library (wileyonlinelibrary.com/journal/htj). DOI 10.1002/htj.21042
Spatio‐temporal evaluation of the groundwater quality in Kafr Al‐Zayat District, Egypt
Authors: Masoud Alaa A. 
Published: March 2013

AbstractEighteen groundwater well sites located in Kafr Al‐Zayat (Egypt) were sampled monthly from January 2009 to November 2011 for microbial content, Mn+2, Fe+2, total dissolved solids (TDS), total hardness, NO3−, and turbidity. The data were analyzed combining the integrated use of factor and cluster analyses as well as the geostatistical semi‐variogram modeling. The prime objectives were to assess the groundwater suitability for drinking, to document the factors governing the spatio‐tempral variability, and to recognize distinctive groundwater quality patterns to help enable effective sustainability and proactive management of the limited resource.The groundwater microbial, Mn+2, Fe+2, TDS, and total hardness contents violated the drinking water local standards while the turbidity and the nitrate content complied with them. Factor analysis indicated that the microbial content is the most influential factor raising the variability potential followed, in decreasing order, by Mn2+, Fe2+, TDS, NO3−, turbidity, and finally the total hardness. Turbidity resulting from urban and agricultural runoff was strongly associated with most of the quality parameters. Quality parameters fluctuate sporadically without concrete pattern in space and time while their variability scores peak in November every year. Three spatially distinctive quality patterns were recognized that were consistent with and affected by the cumulative effects of the local topography, depth to water table, thickness of the silty clay (cap layer), surface water, and groundwater flow direction and hence the recharge from contaminated surface canals and agricultural drains. Copyright © 2013 John Wiley & Sons, Ltd.
Influence of shrub canopy morphology and rainfall characteristics on stemflow within a revegetated sand dune in the Tengger Desert, NW China
Authors: Wang Xin‐ping , Zhang Ya‐feng , Wang Zheng‐ning , Pan Yan‐xia , Hu Rui , Li Xiao‐jun , Zhang Hao 
Published: March 2013

AbstractStemflow of xerophytic shrubs was monitored on event basis within a revegetated sand dune. Quantity of stemflow showed a clear species‐specific dependence in combination with the rainfall characteristics. Results obtained revealed that for ovate‐leaved C. korshinskii with an inverted cone‐shaped canopy and smooth bark, the quantity of stemflow in depth accounted for 7.2% of the individual gross rainfall, while it was 2.0% for needle‐leaved A. ordosica with a cone‐shaped canopy and coarse bark. There were significant positive linear relationships between stemflow and individual gross rainfall and rainfall intensity for the two shrubs. An individual gross rainfall of 1.4 and 1.8 mm was necessary for stemflow generation for C. korshinskii and A. ordosica, respectively. Multiple regression analysis showed that the abiotic and biotic variables including the individual gross rainfall, mean windspeed (WS), canopy height, branch length, and canopy volume have significant influence on stemflow for C. korshinskii, whereas for A. ordosica, the notable influencing variables were individual gross rainfall, stem diameter, and leaf area index. Generally, WS has less effect on stemflow than that of rainfall for A. ordosica. The correlation relationship between individual gross rainfall and funneling ratio showed that the funneling ratio attains its peak when the gross rainfall is 13 and 16 mm for C. korshinskii and A. ordosica, respectively, implying that the canopy morphology emerged as determining factors on funneling ratio decrease when the individual gross rainfall exceeds these values. In comparison, higher WS increased the funneling ratio remarkably for C. korshinskii than A. ordosica due partly to the greater branch length and canopy projection area in C. korshinskii. Funneling ratio can be used as an integrated variable for the effects of canopy morphology and rainfall characteristics on stemflow. The implication of stemflow on water balance and its contribution to sustain the shrubs and the revegetation efforts was discussed. Copyright © 2013 John Wiley & Sons, Ltd.
Quantitative tractography and tract shape modeling in amyotrophic lateral sclerosis
Authors: Bastin Mark E. , Pettit Lewis D. , Bak Thomas H. , Gillingwater Thomas H. , Smith Colin , Abrahams Sharon 
Published: March 2013

PurposeTo investigate brain‐wide white matter structural changes associated with amyotrophic lateral sclerosis (ALS) using an automatic single seed point tractography‐based segmentation method, probabilistic neighborhood tractography (PNT), which provides quantitative measures of both tract integrity and shape.Materials and MethodsDiffusion MRI data were acquired from 30 patients with ALS (ALS Functional Rating Scale‐Revised score > 20) and 30 matched controls. PNT was used to segment 12 major projection, commissural and association fibers, and assess differences in how the shape of an individual subject's tract compares to that of a predefined reference tract, in addition to providing tract‐average mean diffusivity (〈D〉) and fractional anisotropy (FA) data.ResultsAcross all 12 tracts, group‐averaged 〈D〉 was larger, while group‐averaged FA was equal to or smaller in value for patients than controls. These differences were significant for right cingulum 〈D〉, and left and right corticospinal tract (CST) 〈D〉 and FA (P‐values 6 × 10−5 to 0.03). Tract shape modeling indicated that there were significantly greater topological differences from the reference tract in left and right CST, and right uncinate fasciculus (P‐values 0.02 to 0.04) for patients than controls. The rate of disease progression was significantly negatively correlated with bilateral CST FA (P‐values 0.01 to 0.02).ConclusionALS, although particularly affecting CST, is associated with subtle changes in white matter tract integrity and shape in several other major fibers within the brain. Correlations between CST integrity and disease progression rate suggest that quantitative tractography may provide useful biomarkers of disease evolution in ALS. J. Magn. Reson. Imaging 2013;38:1140–1145. © 2013 Wiley Periodicals, Inc.
Tribological behaviour analysis of hydrogenated and nonhydrogenated DLC lubricated by oils with and without additives
Authors: Héau Christophe , Ould Choumad , Maurin‐Perrier Philippe 
Published: March 2013

ABSTRACTDiamond‐like carbon (DLC) is an essential element of friction reduction made major by the desire to reduce energy consumption for environmental and economic reasons. The contribution of the DLC depends on its tribological behaviour. The analysis of the wear of DLC in DLC/steel contact is important because of the high exposure to the wear of coated parts and the low degree of mastery of behaviour of DLC in the lubricants studied and optimised for steel. In this study, we have analysed the tribological behaviour of hydrogenated DLC (a‐C:H) and nonhydrogenated DLC (ta‐C) under various lubrication conditions. Oils with and without additives were used. The results show that the wear of a‐C:H is considerably lower than that of ta‐C in base oils, and in the investigated oil with additives, the wear of ta‐C is substantially reduced. Copyright © 2012 John Wiley & Sons, Ltd.
High‐resolution multishot spiral diffusion tensor imaging with inherent correction of motion‐induced phase errors
Authors: Truong Trong‐Kha , Guidon Arnaud 
Published: March 2013

PurposeTo develop and compare three novel reconstruction methods designed to inherently correct for motion‐induced phase errors in multishot spiral diffusion tensor imaging without requiring a variable‐density spiral trajectory or a navigator echo.Theory and MethodsThe first method simply averages magnitude images reconstructed with sensitivity encoding from each shot, whereas the second and third methods rely on sensitivity encoding to estimate the motion‐induced phase error for each shot and subsequently use either a direct phase subtraction or an iterative conjugate gradient algorithm, respectively, to correct for the resulting artifacts. Numerical simulations and in vivo experiments on healthy volunteers were performed to assess the performance of these methods.ResultsThe first two methods suffer from a low signal‐to‐noise ratio or from residual artifacts in the reconstructed diffusion‐weighted images and fractional anisotropy maps. In contrast, the third method provides high‐quality, high‐resolution diffusion tensor imaging results, revealing fine anatomical details such as a radial diffusion anisotropy in cortical gray matter.ConclusionThe proposed sensitivity encoding + conjugate gradient method can inherently and effectively correct for phase errors, signal loss, and aliasing artifacts caused by both rigid and nonrigid motion in multishot spiral diffusion tensor imaging, without increasing the scan time or reducing the signal‐to‐noise ratio. Magn Reson Med 71:790–796, 2014. © 2013 Wiley Periodicals, Inc.