bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: NAPHTHALENE‐1,8‐DISULFINIC ACID‐NAPHTHO(1,8‐CD)‐1,2‐DITHIOLE 1,1,2‐TRIOXIDE EQUILIBRIUM. SULFINIC ACID‐SULFINYL SULFONE EQUILIBRIUM WHERE THE SULFINYL SULFONE IS STRONGLY FAVORED EVEN IN AQUEOUS SOLUTION
Authors: KICE J. L. , MARGOLIS H. 
Published: March 2016

AbstractNatrium‐naphthalin‐1,8‐disulfonat (II) wird aus dem cyclischen Thiolsulfonat (I) mit Wasserstoffperoxid hergestellt.
ChemInform Abstract: NEW SYNTHESIS OF 2,4‐QUINOLINEDIONES
Authors: MITSCHER L. A. , CLARK G. W. , SUZUKI T. , BATHALA M. S. 
Published: March 2016

AbstractDas Chinolinderivat (IIa) entsteht durch Alkylierung von (I) mit Natriumdiäthylmalonat, aus (IIa) wird über die Säure (IIb) der Trichlorester (IIc) erhalten.
ChemInform Abstract: 2,6‐DIMETHYLOXEPIN AND N‐CARBETHOXYAZEPINE AS DIENOPHILES IN THE INVERSE DIELS‐ALDER REACTION
Authors: SEITZ G. , KAEMPCHEN T. 
Published: March 2016

AbstractDas Dicarbomethoxytetrazin (I) reagiert mit dem Oxepin (II) in siedendem Methylenchlorid zu dem Addukt (III), das mit Chloranil zum symmetrischen Oxepinderivat (IV) oxidiert wird.
ChemInform Abstract: SYNTHESIS AND CERTAIN PROPERTIES OF FLUOROALKYLPHOSPHITES AND PHOSPHONITES
Authors: PRONS V. N. , GRINBLAT M. P. , KLEBANSKII A. L. 
Published: March 2016

AbstractBis‐ (fluoralkyl)‐chlorphosphite (IV) und Fluoralkylchlorphosphonite (VII) erhält man durch Einwirkung von Natriumverbindungen fluorierter Alkohole (II) auf diäthylaminogruppenhaltige di‐ (I) und monohalogenierte (V) Phosphine.
ChemInform Abstract: MOESSBAUER AND RELATED STUDIES OF COMPLEXES OF R2SN(NCS)2 WITH NEUTRAL LIGANDS CONTAINING OXYGEN DONOR ATOMS
Authors: MULLINS F. PATRICIA , CURRAN COLUMBA 
Published: March 2016

Abstract26 Komplexe vom Typ (I) bis (III) werden anhand von Mößbauer und IR‐Spektren sowie Dipolmomenten untersucht.
ChemInform Abstract: REACTION OF 1,1,3,3‐TETRABUTYL‐1,3‐BIS(TERT‐BUTYLPEROXY)DISTANNOXANE WITH CARBOXYLIC ACID ANHYDRIDES
Authors: DODONOV V. A. , CHESNOKOV V. V. , DREGICH' A. I. , MAKARENKO N. P. 
Published: March 2016

AbstractDas Bisperoxy‐distannoxan (I) tauscht mit 2 Mol Acetanhydrid (II) beide Peroxygruppen gegen den Acylrest zu (III) aus, daneben entsteht das tert.‐Butylperacetat (IV).
ChemInform Abstract: EFFECT OF COORDINATION WITH THE CHROMIUM TRICARBONYL GROUP ON THE POLAROGRAPHIC REDUCTION OF SOME ALKYL AND ARYL PHENYL KETONES IN DIMETHYLFORMAMIDE
Authors: CECCON ALBERTO , ROMANIN ANNAMARIA , VENZO ALFONSO 
Published: March 2016

AbstractDer Mechanismus der elektrochemischen Reduktion von Pivalophenon‐, Benzophenon‐ und Fluorenontricarbonyl‐Cr wird mittels Polarographie und ESR‐Spektroskopie untersucht.
ChemInform Abstract: SOME ARYLDIAZO COMPLEXES OF RHENIUM
Authors: DOUGLAS PHILIP G. , GALBRAITH ANTHONY R. , SHAW BERNARD L. 
Published: March 2016

AbstractDer mer‐Trichloro‐Komplex (Ia) reagiert mit Phenylhydrazin (IIa) zu den Phenyldiazo‐Komplexen (IIIa) und (IV).
ChemInform Abstract: ACID HYDROLYSIS OF CARBOXYLATOPENTAAMINECOBALT(III) COMPLEXES. KINETICS AND MECHANISM OF AQUATION OF MALONATO, SUCCINATO, O‐PHTHALATO AND O‐METHOXYBENZOATO PENTAAMMINECOBALT(III) COMPLEXES
Authors: DASH A. C. , NANDA R. K. 
Published: March 2016

AbstractUntersucht wird der Einfluß der strukturellen Änderung in den Carboxylatliganden auf die Aquotisierungsgeschwindigkeit und ihren Mechanismus.
ChemInform Abstract: ADDUCTS OF N,N‐DIALKYLTHIO‐ AND ‐SELENOCARBAMATOCOPPER(I) WITH TERTIARY PHOSPHINE. SYNTHESIS AND SOLUTION STRUCTURE
Authors: NAKAJIMA HIDEYUKI , MATSUMOTO KOJI , TANAKA KOJI , TANAKA TOSHIO 
Published: March 2016

AbstractWährend bei der 1:2‐molaren Umsetzung von Cu‐dialkylthiocarbamaten mit Triphenylphosphin und der 1:1:2‐molaren Reaktion von CuCl, Dialkylammonium‐dialkylselenocarbamaten und Triphenylphosphin nur die Tris‐[phosphin]‐dikupfer‐Komplexe (Ia) entstehen, bildet Methyldiphenylphosphin unter analogen Bedingungen die Produkte (II).
ChemInform Abstract: RHODIUM COMPLEXES OF GROUP 4A LIGANDS
Authors: HILL ROBIN , KNOX SELBY A. R. 
Published: March 2016

AbstractDie Reaktion des Rh‐Komplexes (I) mit Trimethylsilicium‐, ‐germanium‐ oder ‐zinnhydrid wurde unter thermischen und photochemischen Bedingungen untersucht.
ChemInform Abstract: CHEMISTRY OF POLYNUCLEAR COMPOUNDS. XXVI. PRODUCTS OF THE PYROLYSIS OF DODECACARBONYL‐TRIANGULO‐TRIRUTHENIUM AND ‐TRIOSMIUM
Authors: EADY COLIN R. , JOHNSON BRIAN F. G. , LEWIS JACK 
Published: March 2016

AbstractDie Pyrolyse des Carbonyls (I) liefert bis 180°C ausschließlich den Carbidocluster (II).
ChemInform Abstract: NEW SYNTHESIS OF 17‐SPIROFURAN DERIVATIVES OF ANDROSTANES
Authors: AKHREM A. A. , LAKHVICH V. A. , KHRIPACH V. A. 
Published: March 2016

AbstractDas Äthinyldiol (I) setzt sich mit Acetonitriloxid (II) zu dem Isoxazol (III) um.
ChemInform Abstract: AMINO SUGARS. XXXII. PARTIAL ESTERIFICATION OF METHYL 3‐ACETAMIDO‐3,6‐DIDEOXY‐β‐D‐GALACTOPYRANOSIDE AND METHYL 3‐ACETAMIDO‐3,6‐DIDEOXY‐β‐D‐TALOPYRANOSIDE
Authors: STANEK J. JUN. , CAPEK K. , JARY J. 
Published: March 2016

AbstractDie Acetylierung der isomeren Zuckerderivate (I) bzw. (III) mit Acetanhydrid bzw. mit Acetylchlorid führt zur Bildung der Produktgemische (IIa)‐(IIc) bzw. (IVa) bis (IVc); Kinetik und Mechanismus dieser Reaktionen werden im Hinblick auf die erhaltenen verschiedenen Produktzusammensetzungen eingehend untersucht.
ChemInform Abstract: SYNTHESIS OF 1,12B‐DIDEHYDROLYCORAN (α‐ANHYDRODIHYDROCARANINE) AND 12Bα‐LYCORAN (Γ‐LYCORAN) BY PHOTOCYCLIZATION OF AN ENAMIDE KETONE
Authors: IIDA HIDEO , AOYAGI SAKAE , KIBAYASHI CHIHIRO 
Published: March 2016

AbstractAus p‐Anisaldehyd wird durch Chlorierung mit SOzClg zum Aldehyd (Ia), dessen Reaktion mit Nitromethan in Essigsäure zum Nitrostyrol (Ib) und dessen Reduktion mit LiAlH4 das Amin (Ic) dargestellt, das durch RingschlußQDehydrObenZOI‐Reaktion) in das Indolin (II) übergeführt wird.
ChemInform Abstract: SYNTHESIS OF PROSTANOIC ACID
Authors: HAMON A. , LACOUME B. , OLIVIER A. , PILGRIM W. R. 
Published: March 2016

AbstractDas Formylcyclopenten (I) liefert mit überschüssigem Lithiumcuprat (II) in Äther bei ‐7 8°C ein Gemisch der Aldehyde (III), das bei Behandlung mit Basen nur das Isomere (IV) ergibt.
A virtual sizing tool for mitral valve annuloplasty
Authors: Rausch Manuel K. , Zöllner Alexander M. , Genet Martin , Baillargeon Brian , Bothe Wolfgang , Kuhl E. 
Published: March 2016

SummaryFunctional mitral regurgitation, a backward leakage of the mitral valve, is a result of left ventricular growth and mitral annular dilatation. Its gold standard treatment is mitral annuloplasty, the surgical reduction in mitral annular area through the implantation of annuloplasty rings. Recurrent regurgitation rates may, however, be as high as 30% and more. While the degree of annular downsizing has been linked to improved long‐term outcomes, too aggressive downsizing increases the risk of ring dehiscences and significantly impairs repair durability. Here, we prototype a virtual sizing tool to quantify changes in annular dimensions, surgically induced tissue strains, mitral annular stretches, and suture forces in response to mitral annuloplasty. We create a computational model of dilated cardiomyopathy onto which we virtually implant annuloplasty rings of different sizes. Our simulations confirm the common intuition that smaller rings are more invasive to the surrounding tissue, induce higher strains, and require larger suture forces than larger rings: The total suture force was 2.2 N for a 24‐mm ring, 1.9 N for a 28‐mm ring, and 0.8 N for a 32‐mm ring. Our model predicts the highest risk of dehiscence in the septal and postero–lateral annulus where suture forces are maximal. These regions co‐localize with regional peaks in myocardial strain and annular stretch. Our study illustrates the potential of realistic predictive simulations in cardiac surgery to identify areas at risk for dehiscence, guide the selection of ring size and shape, rationalize the design of smart annuloplasty rings and, ultimately, improve long‐term outcomes after surgical mitral annuloplasty. Copyright © 2016 John Wiley & Sons, Ltd.
Determining Solubility and Diffusivity by Using a Flow Cell Coupled to a Mass Spectrometer
Authors: Khodayari Mehdi , Reinsberg Philip , Abd‐El‐Latif Abd‐El‐Aziz A. , Merdon Christian , Fuhrmann Juergen , Baltruschat Helmut 
Published: March 2016

AbstractOne of the main challenges in metal–air batteries is the selection of a suitable electrolyte that is characterized by high oxygen solubility, low viscosity, a liquid state and low vapor pressure across a wide temperature range, and stability across a wide potential window. Herein, a new method based on a thin layer flow through cell coupled to a mass spectrometer through a porous Teflon membrane is described that allows the determination of the solubility of volatile species and their diffusion coefficients in aqueous and nonaqueous solutions. The method makes use of the fact that at low flow rates the rate of species entering the vacuum system, and thus the ion current, is proportional to the concentration times the flow rate (c⋅u) and independent of the diffusion coefficient. The limit at high flow rates is proportional to
. Oxygen concentrations and diffusion coefficients in aqueous electrolytes that contain Li+ and K+ and organic solvents that contain Li+, K+, and Mg2+, such as propylene carbonate, dimethyl sulfoxide tetraglyme, and N‐methyl‐2‐pyrrolidone, have been determined by using different flow rates in the range of 0.1 to 80 μL s−1. This method appears to be quite reliable, as can be seen by a comparison of the results obtained herein with available literature data. The solubility and diffusion coefficient values of O2 decrease as the concentration of salt in the electrolyte was increased due to a “salting out” effect.
Thermodynamic Stability of Transition‐Metal‐Substituted LiMn2−xMxO4 (M=Cr, Fe, Co, and Ni) Spinels
Authors: Lai Chenying , Chen Jiewei , Knight James C. , Manthiram Arumugam , Navrotsky Alexandra 
Published: March 2016

AbstractThe formation enthalpies from binary oxides of LiMn2O4, LiMn2−xCrxO4 (x=0.25, 0.5, 0.75 and 1), LiMn2−xFexO4 (x=0.25 and 0.5), LiMn2−xCoxO4 (x=0.25, 0.5, and 0.75) and LiMn1.75Ni0.25O4 at 25 °C were measured by high temperature oxide melt solution calorimetry and were found to be strongly exothermic. Increasing the Cr, Co, and Ni content leads to more thermodynamically stable spinels, but increasing the Fe content does not significantly affect the stability. The formation enthalpies from oxides of the fully substituted spinels, LiMnMO4 (M=Cr, Fe and Co), become more exothermic (implying increasing stability) with decreasing ionic radius of the metal and lattice parameters of the spinel. The trend in enthalpy versus metal content is roughly linear, suggesting a close‐to‐zero heat of mixing in LiMn2O4—LiMnMO4 solid solutions. These data confirm that transition‐metal doping is beneficial for stabilizing these potential cathode materials for lithium‐ion batteries.
Hydrogelation Induced by Change in Hydrophobicity of Amino Acid Side Chain in Fmoc‐Functionalised Amino Acid: Significance of Sulfur on Hydrogelation
Authors: Reddy Samala Murali Mohan , Dorishetty Pramod , Deshpande Abhijit P. , Shanmugam Ganesh 
Published: March 2016

AbstractAlthough a few Fmoc‐functionalised amino acids (Fmoc‐AA) are capable of forming hydrogels, the exact levels of hydrophobicity, hydrogen bonding, and ionic nature of the Fmoc‐AA gelator required for hydrogel formation remains uncertain. Here, the role of hydrophobicity of amino acid side chain, particularly in the formation of hydrogel, was studied by using Fmoc‐norleucine (Fmoc‐Nle) and its simple sulfur analogues such as Fmoc‐methionine (Fmoc‐M) in which the γCH2 of Fmoc‐Nle is replaced by sulfur. Results indicate that Fmoc‐M forms thermally reversible hydrogels in water (pH ca. 6.8), whereas Fmoc‐Nle fails to display any gelation under similar conditions. The result suggests that substitution of the sulfur atom likely reduces the hydrophobicity of the alkyl side chain in Fmoc‐Nle to the optimum level, which is sufficient to induce supramolecular hydrogelation in Fmoc‐M. The difference in the self‐association behaviour of Fmoc‐M and Fmoc‐Nle emphasise the importance of weak noncovalent interaction between side chains (in addition to the hydrogen‐bond and aromatic interactions) to stabilise supramolecular self‐assembly of Fmoc‐functionalised compounds. The current observations provide a lead to the design of new sulfur‐based low molecular weight gelators for various potential applications.
Imine‐Functionalized Triazatriangulenium Platforms: Towards an Artificial Ciliated Epithelium
Authors: Hammerich Melanie , Rusch Talina , Krekiehn Nicolai R. , Bloedorn Andreas , Magnussen Olaf M. , Herges Rainer 
Published: March 2016

AbstractTriazatriangulenium (TATA) platforms have been used to prepare highly ordered, self‐assembled monolayers of free‐ and vertically standing imines on Au(111) surfaces. Upon irradiation, the imines undergotrans–cisisomerization and a fast thermal reaction (t1/2=0.58 s at 20 °C) back to the more stabletransform. It is known that the photochemical reaction proceeds through rotation of the C=N bond and the thermochemical reaction through inversion at the N atom. The imine motors, therefore, should be able to induce a net displacement of particles above the surface similar to cilia epithelia in nature.
Donor/Acceptor Mixed Self‐Assembled Monolayers for Realising a Multi‐Redox‐State Surface
Authors: Casado‐Montenegro Javier , Marchante Elena , Crivillers Núria , Rovira Concepció , Mas‐Torrent Marta 
Published: March 2016

AbstractMixed molecular self‐assembled monolayers (SAMs) on gold, based on two types of electroactive molecules, that is, electron‐donor (ferrocene) and electron‐acceptor (anthraquinone) molecules, are prepared as an approach to realise surfaces exhibiting multiple accessible redox states. The SAMs are investigated in different electrolyte media. The nature of these media has a strong impact on the types of redox processes that take place and on the redox potentials. Under optimised conditions, surfaces with three redox states are achieved. Such states are accessible in a relatively narrow potential window in which the SAMs on gold are stable. This communication elucidates the key challenges in fabricating bicomponent SAMs as electrochemical switches.
A Bis‐Manganese(II)–DOTA Complex for Pulsed Dipolar Spectroscopy
Authors: Demay‐Drouhard Paul , Ching H. Y. Vincent , Akhmetzyanov Dmitry , Guillot Régis , Tabares Leandro C. , Bertrand Hélène C. , Policar Clotilde 
Published: March 2016

AbstractHigh‐spin gadolinium(III) and manganese(II) complexes have emerged as alternatives to standard nitroxide radical spin labels for measuring nanometric distances by using pulsed electron–electron double resonance (PELDOR or DEER) at high fields/frequencies. For certain complexes, particularly those with relatively small zero‐field splitting (ZFS) and short distances between the two metal centers, the pseudosecular term of the dipolar coupling Hamiltonian is non‐negligible. However, in general, the contribution from this term during conventional data analysis is masked by the flexibility of the molecule of interest and/or the long tethers connecting them to the spin labels. The efficient synthesis of a model system consisting of two [Mn(dota)]2− (MnDOTA; DOTA4−=1,4,7,10‐tetraazacyclododecane‐1,4,7,10‐tetraacetate) directly connected to the ends of a central rodlike oligo(phenylene–ethynylene) (OPE) spacer is reported. The rigidity of the OPE is confirmed by Q‐band PELDOR measurements on a bis‐nitroxide analogue. The MnII−MnII distance distribution profile determined by W‐band PELDOR is in reasonable agreement with one simulated by using a simple rotamer analysis. The small degree of flexibility arising from the linking MnDOTA arm appears to outweigh the contribution from the pseudosecular term at this interspin distance. This study illustrates the potential of MnDOTA‐based spin labels for measuring fairly short nanometer distances, and also presents an interesting candidate for in‐depth studies of pulsed dipolar spectroscopy methods on MnII−MnII systems.
Complexities of landscape evolution during incision through layered stratigraphy with contrasts in rock strength
Authors: Forte Adam M. , Yanites Brian J. , Whipple Kelin X. 
Published: March 2016

AbstractVariation in the erodibility of rock units has long been recognized as an important determinant of landscape evolution but has been little studied in landscape evolution models. We use a modified version of the Channel‐Hillslope Integrated Landscape Development (CHILD) model, which explicitly allows for variations in rock strength, to reveal and explore the remarkably rich, complex behavior induced by rock erodibility variations in even very simple geologic settings with invariant climate and tectonics. We study the importance of relative contrasts in erodibility between just two units, the order of these units (whether hard rocks overlie soft or soft rocks overlie hard) and the orientation of the contact between the two units. We emphasize the spatial and temporal evolution of erosion rates, which have important implications for basin analysis, detrital mineral records, and the interpretation of cosmogenic isotope concentrations in detrital samples. Results of the landscape evolution modeling indicate that the stratigraphic order of units in terms of erodibility, the gross orientation of the contact (i.e. dipping away or toward the outlet of the landscape) and the contact dip angle all have measurable effects on landscape evolution, including significant spatial and temporal variations in erosion rates. Steady‐state denudation conditions are unlikely to develop in landscapes with significant contrasts in rock strength in horizontal to moderately tilted rock layers, at least at the scale of the entire landscape. Additionally, our results demonstrate that there is no general relation between rock erodibility and erosion rates in natural settings. Although rock erodibility directly controls the erosion rate constant in our models, it is not uncommon for higher erosion rates to occur in the harder, less erodible rock. Indeed erosion rates may be either greater or less than the rock uplift rate (invariant in time and space in our models) in both hard and soft rocks, depending on the local geology, topography, and the pattern of landscape evolution. Copyright © 2016 John Wiley & Sons, Ltd.
Quantitative 3D magnetic resonance elastography: Comparison with dynamic mechanical analysis
Authors: Arunachalam Shivaram P. , Rossman Phillip J. , Arani Arvin , Lake David S. , Glaser Kevin J. , Trzasko Joshua D. , Manduca Armando , McGee Kiaran P. , Ehman Richard L. , Araoz Philip A. 
Published: March 2016

PurposeMagnetic resonance elastography (MRE) is a rapidly growing noninvasive imaging technique for measuring tissue mechanical properties in vivo. Previous studies have compared two‐dimensional MRE measurements with material properties from dynamic mechanical analysis (DMA) devices that were limited in frequency range. Advanced DMA technology now allows broad frequency range testing, and three‐dimensional (3D) MRE is increasingly common. The purpose of this study was to compare 3D MRE stiffness measurements with those of DMA over a wide range of frequencies and shear stiffnesses.Methods3D MRE and DMA were performed on eight different polyvinyl chloride samples over 20–205 Hz with stiffness between 3 and 23 kPa. Driving frequencies were chosen to create 1.1, 2.2, 3.3, 4.4, 5.5, and 6.6 effective wavelengths across the diameter of the cylindrical phantoms. Wave images were analyzed using direct inversion and local frequency estimation algorithm with the curl operator and compared with DMA measurements at each corresponding frequency. Samples with sufficient spatial resolution and with an octahedral shear strain signal‐to‐noise ratio > 3 were compared.ResultsConsistency between the two techniques was measured with the intraclass correlation coefficient (ICC) and was excellent with an overall ICC of 0.99.Conclusions3D MRE and DMA showed excellent consistency over a wide range of frequencies and stiffnesses. Magn Reson Med 77:1184–1192, 2017. © 2016 The Authors Magnetic Resonance in Medicine published by Wiley Periodicals, Inc. on behalf of International Society for Magnetic Resonance in Medicine. This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
Evolution in surface morphology during rapid microwave annealing of PS‐b‐PMMA thin films
Authors: Qiang Zhe , Ye Changhuai , Lin Kehua , Becker Matthew L. , Cavicchi Kevin A. , Vogt Bryan D. 
Published: March 2016

ABSTRACTMicrowave annealing enables rapid (60 s) ordering and orientation of block copolymer films. The developed morphology in polystyrene‐block‐poly(methyl methacrylate) (PS‐b‐PMMA) thin films depends on details of the heating rate that is controlled by microwave output energy as well as the sample location in the microwave. Over a wide heating rate (1.1–2.7 °C/s), perpendicular orientation of the cylindrical mesostructure at the surface is >50% after 60 s, but goes through a maximum at 1.8 °C/s leading to approximately 97% perpendicular cylinders at the surface. The propagation of this perpendicular surface morphology through the film thickness is also dependent upon the microwave annealing conditions. The surface structure evolves with the microwave annealing time from imperfect ordering to perpendicular cylinders to parallel cylinders as the annealing time increases. This work demonstrates the importance of controlling the heating rate during microwave annealing, which will be critical for optimizing microwave conditions for directed self‐assembly. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 1499–1506
Analysis of breakdown characteristics in source field‐plate AlGaN/GaN HEMTs
Authors: Onodera Hiraku , Hanawa Hideyuki , Horio Kazushige 
Published: March 2016

AbstractTwo‐dimensional analysis of off‐state breakdown characteristics of source field‐plate AlGaN/GaN HEMTs is performed by considering a deep donor and a deep acceptor in a buffer layer. It is shown that the introduction of field plate is effective in improving the breakdown voltage, but it can decrease with the field‐plate length, and hence its optimum length should exist. It is also shown that the breakdown voltage of the source field‐plate structure is a little lower than that of the gate field‐plate structure when the field‐plate length is short, because the electric field at the drain edge of the gate becomes higher. (© 2015 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)