bluuebunny/crossref_metadata_2025_split huggingface dataset:
Sogdian Documents from Khotan, II
Authors: Bo Bi , Sims-Williams Nicholas 
Published: September 2015

A group of Sogdian documents from the area of Khotan was recently acquired by Renmin University of China, Beijing. Four economic documents were edited in JAOS 130/4 (2010); the present article, comprising the edition of one complete letter and several fragments of letters, completes the publication of this collection, which adds to a growing body of evidence for the presence of Sogdian-speakers on the trade routes to the south of the Taklamakan desert.
Transient eddies in the MACDA Mars reanalysis
Authors: Mooring Todd A. , Wilson R. John 
Published: September 2015

AbstractWe present a survey of the transient eddy activity in the Mars Analysis Correction Data Assimilation (MACDA) reanalysis. The spatial structure and propagation characteristics of the eddies are emphasized. Band‐pass‐filtered variance and covariance fields are found to be zonally modulated, indicating a longitude dependence of the typical amplitudes of Martian transient eddies. Considerable repeatability of the eddy field spatial structures is found across Mars years, including a roughly wave number 3 pattern of low‐level eddy meridional temperature transport
in the northern hemisphere that is evident before and after winter solstice and a possible tendency for northern hemisphere eddy kinetic energy maxima to be located above low‐lying areas. Southern hemisphere eddy fields tend to feature two local maxima, one roughly south of Tharsis and the other associated with Hellas. Eddies are weakened near winter solstice in both hemispheres and were generally weakened in the northern hemisphere during the 2001 (Mars year 25) global dust storm, albeit with little change in spatial patterns. Because the transient eddies propagate in space, we also used a teleconnection map‐based technique to estimate their phase velocities. Eddy propagation at the surface is found to follow topography, a phenomenon less evident at higher altitude. Possible physical mechanisms underlying the documented eddy phenomena are discussed.
Identifying binding hot spots on protein surfaces by mixed‐solvent molecular dynamics: HIV‐1 protease as a test case
Authors: Ung Peter M. U. , Ghanakota Phani , Graham Sarah E. , Lexa Katrina W. , Carlson Heather A. 
Published: September 2015

ABSTRACTMixed‐solvent molecular dynamics (MixMD) simulations use full protein flexibility and competition between water and small organic probes to achieve accurate hot‐spot mapping on protein surfaces. In this study, we improved MixMD using human immunodeficiency virus type‐1 protease (HIVp) as the test case. We used three probe–water solutions (acetonitrile–water, isopropanol–water, and pyrimidine–water), first at 50% w/w concentration and later at 5% v/v. Paradoxically, better mapping was achieved by using fewer probes; 5% simulations gave a superior signal‐to‐noise ratio and far fewer spurious hot spots than 50% MixMD. Furthermore, very intense and well‐defined probe occupancies were observed in the catalytic site and potential allosteric sites that have been confirmed experimentally. The Eye site, an allosteric site underneath the flap of HIVp, has been confirmed by the presence of a 5‐nitroindole fragment in a crystal structure. MixMD also mapped two additional hot spots: the Exo site (between the Gly16‐Gly17 and Cys67‐Gly68 loops) and the Face site (between Glu21‐Ala22 and Val84‐Ile85 loops). The Exo site was observed to overlap with crystallographic additives such as acetate and dimethyl sulfoxide that are present in different crystal forms of the protein. Analysis of crystal structures of HIVp in different symmetry groups has shown that some surface sites are common interfaces for crystal contacts, which means that they are surfaces that are relatively easy to desolvate and complement with organic molecules. MixMD should identify these sites; in fact, their occupancy values help establish a solid cut‐off where “druggable” sites are required to have higher occupancies than the crystal‐packing faces. © 2015 Wiley Periodicals, Inc. Biopolymers 105: 21–34, 2016.
Factors influencing left ventricular outflow tract obstruction following a mitral valve‐in‐valve or valve‐in‐ring procedure, part 1
Authors: Bapat Vinnie , Pirone Francesco , Kapetanakis Stam , Rajani Ronak , Niederer Steven 
Published: September 2015

ObjectivesTo determine the factors influencing left ventricular outflow tract (LVOT) area reduction after a mitral valve‐in‐valve (VIV) or a valve‐in‐ring (VIR) procedure.BackgroundTranscatheter heart valves (THVs) are increasingly used in performing a VIV or a VIR procedure in high‐risk patients. Although less invasive, a potential complication is LVOT obstruction. However, the factors predisposing to LVOT obstruction are ill defined.Methods and ResultsTo understand the effects of the various factors, the study was carried out in three parts: To understand the effect of VIV and VIR on reduction in LVOT area with special attention to different surgical heart valve (SHV) orientations and depth of THV implant. This was carried out in porcine and cadaver hearts. To quantify aorto–mitral–annular (AMA) angle in 20 patients with or without mitral disease and to derive a static computational model to predict LVOT obstruction. To study the effect of SHV design on LVOT obstruction after VIV. This was carried out as a bench test.LVOT area reduction was similar after VIV irrespective of orientation of the mitral SHV implantation as it pinned open the SHV leaflets. Similar effect was seen after VIR. The degree of LVOT obstruction was partly determined by AMAangle and was inversely proportional. SHV design, ring design, and depth of SPAIEN XT implantation also had effect on LVOT obstruction.ConclusionsA possibility of LVOT obstruction should be considered when performing a VIV and VIR procedure. Type of SHV, flexible ring, less obtuse AMA angle, and depth of SAPIEN XT implant can influence the risk. © 2015 Wiley Periodicals, Inc.
TAVR in patients with severe aortic stenosis and less than high risk: Future or present reality?
Authors: Jatene Tannas , Bhatt Deepak L. 
Published: September 2015

Key points

TAVR use is growing in patients with less than high surgical risk.
Several registries, including this one, show excellent safety with TAVR in intermediate‐risk patients compared with similar patients undergoing SAVR.
Long‐term data from ongoing randomized trials will answer definitively if we should routinely perform TAVR in intermediate‐risk patients.
ChemInform Abstract: Alkali Metal Suboxometalates — Structural Chemistry Between Salts and Metals.
Authors: Woersching Matthias , Hoch Constantin 
Published: September 2015

AbstractThe new cesium‐poor suboxometalates Cs10MO5 (M: Al, Ga, Fe) showing both ionic and metallic bonding are synthesized from mixtures of Cs, M2O3, and Cs2O in the ratio 6:1:7 (Ta crucible, 250—320 °C, 5 h).
ChemInform Abstract: Two‐Dimensional Charge Disproportionation of the Unusual High Valence State Fe4+ in a Layered Double Perovskite.
Authors: Hosaka Yoshiteru , Ichikawa Noriya , Saito Takashi , Manuel Pascal , Khalyavin Dmitry , Attfield J. Paul , Shimakawa Yuichi 
Published: September 2015

AbstractPolycrystalline samples of Ca2FeMnO6 are prepared by oxidation of the brownmillerite Ca2FeMnO5 with O3 (200 °C, 6 h).
ChemInform Abstract: The Double Phosphates MIMIIPO4 (MI: Na, K; MII: Mg, Mn, Co, Ni, Zn) — Synthesis from Chloride Melts and Characterization.
Authors: Livitska Oksana V. , Strutynska Nataliia Yu. , Zatovsky Igor V. , Slobodyanik Nikolay S. 
Published: September 2015

AbstractInteractions in the systems MIPO3—MIIO (or Mn2O3)—MICl (MI: Na, K; MII: Mg, Co, Ni, Zn) are investigated at molar ratios P/Mx = 1 or 2, and MICl/(MIPO3 + MIIO) = 30 (porcelain crucibles, 1073 K, 3—5 h).
ChemInform Abstract: Dimensional Reduction from 2D Layer to 1D Band for Germanophosphates Induced by the “Tailor Effect” of Fluoride.
Authors: Huang Chun‐Zuo , Liu Biao , Wen Lei , Zhuang Rong‐Chuan , Zhao Jing‐Tai , Pan Yuanming , Mi Jin‐Xiao , Huang Ya‐Xi 
Published: September 2015

AbstractCompounds (IV), (VII), (IX), and (X) are synthesized by an unconventional hydrothermal route and structurally characterized by single crystal XRD.
ChemInform Abstract: A Novel Lead Borate of NaPb4(H2O) (B5O9)2·BO3 with Nonlinear Optical Property.
Authors: Huang Guang , Pan Rui , He Huan , Yang Bai‐Feng , Yang Guo‐Yu 
Published: September 2015

AbstractColorless transparent needle crystals of the new title compound are solvothermally synthesized from a mixture of H3BO3, Pb(OAc)2, NaOAc, DMF, and H2O with a molar ratio of 10:1:2:50:220 (autoclave, 170 °C, 5 d, 64% yield).
ChemInform Abstract: Polyfluoroethoxy Derivatives of Malonic Aldehyde Acetal in the Synthesis of Heterocyclic Compounds.
Authors: Sokolenko Taras M. , Davydova Yulia A. , Yagupolskii Yurii L. 
Published: September 2015

AbstractPolyfluoroethoxy derivatives of malonic aldehyde acetal (III) are synthesized and shown to be useful building blocks for the synthesis of nitrogen heterocycles.
ChemInform Abstract: NHC‐Catalyzed Asymmetric Synthesis of Functionalized Succinimides from Enals and α‐Ketoamides.
Authors: Wang Lei , Ni Qijian , Bluemel Marcus , Shu Tao , Raabe Gerhard , Enders Dieter 
Published: September 2015

AbstractAn asymmetric NHC‐catalyzed formal [3 + 2] cycloaddition of α,β‐unsaturated aldehydes with α‐ketoamides is developed to yield functionalized succinimides (III) and (V) with good diastereo‐ and excellent enantioselectivity.
ChemInform Abstract: Diastereoselective Synthesis of anti‐3‐Hydroxy‐2‐trifluoromethyl Carboxylic Acids.
Authors: Ramachandran P. Veeraraghavan , Otoo Barnabas , Chanda Prem B. 
Published: September 2015

AbstractThe reaction is based on the anti‐stereoselective enolboration‐aldolisation of 3,3,3‐trifluoropropanoic acid with aryl or alkylaldehydes.
ChemInform Abstract: Metal Free One‐Pot Synthesis of α‐Ketoamides from Terminal Alkenes.
Authors: Dutta Sayan , Kotha Surya Srinivas , Sekar Govindasamy 
Published: September 2015

AbstractA practical synthesis of α‐ketoamides is accomplished by oxidation of styrenes with a mixture of iodine and IBX and subsequent one‐pot coupling with cyclic secondary amines.
ChemInform Abstract: Nickel‐Catalyzed Addition‐Type Alkenylation of Unactivated, Aliphatic C—H Bonds with Alkynes: A Concise Route to Polysubstituted γ‐Butyrolactones.
Authors: Li Mingliang , Yang Yudong , Zhou Danni , Wan Danyang , You Jingsong 
Published: September 2015

AbstractThe β‐C(sp3)—H bonds of aliphatic amides containing a quinolinyl group [e.g. (I)] are activated by nickel through a chelation.
ChemInform Abstract: A Novel Carbamoyl Radical Based Dearomatizing Spiroacylation Process.
Authors: Millan‐Ortiz Alejandra , Lopez‐Valdez German , Cortez‐Guzman Fernando , Miranda Luis D. 
Published: September 2015

AbstractXanthates (I), (III), and (V) are transformed into the corresponding spiro compounds (II), (IV), and (VI), resp.
ChemInform Abstract: Vinylic MIDA Boronates: New Building Blocks for the Synthesis of Aza‐Heterocycles.
Authors: Llona‐Minguez Sabin , Desroses Matthieu , Ghassemian Artin , Jacques Sylvain A. , Eriksson Lars , Isacksson Rebecka , Koolmeister Tobias , Stenmark Paal , Scobie Martin , Helleday Thomas 
Published: September 2015

AbstractStarting from o‐nitro‐aryl and ‐heteroaryl halides a two‐step sequence of Suzuki coupling and Cadogan—Sundberg cyclization yields indoles and pyrrolo‐annelated heteroarenes.
ChemInform Abstract: Probing the Origin of Carboxylate Migration Selectivity in Rh2(II)‐Catalyzed N‐Heterocycle Formation from Trisubstituted Styryl Azides.
Authors: Kong Chen , Su Naijing , Zhou Fei , Jana Navendu , Driver Tom G. 
Published: September 2015

AbstractExposure of trisubstituted styryl azides (I), (IV), (VI), and (VIII) to Rh2(II)‐carboxylate catalyst triggers a tandem 4π‐electron‐5‐atom electrocyclization‐migration reaction.
ChemInform Abstract: Enantioselective Synthesis of Chiral Heterocycles Containing Both Chroman and Pyrazolone Derivatives Catalyzed by a Chiral Squaramide.
Authors: Li Jun‐Hua , Du Da‐Ming 
Published: September 2015

AbstractA squaramide‐catalyzed diastereoselective and enantioselective Michael addition of pyrazolin‐5‐ones to 3‐nitro‐2H‐chromenes is developed.
ChemInform Abstract: Organocatalytic Regioselective Asymmetric Michael Addition of Azlactones to O‐Hydroxy Chalcone Derivatives.
Authors: Zhang Shao‐Yun , Ruan Gui‐Yu , Geng Zhi‐Cong , Li Nai‐Kai , Lv Ming , Wang Yong , Wang Xing‐Wang 
Published: September 2015

AbstractThe regioselective asymmetric Michael addition of azlactones to o‐hydroxy chalcone derivatives proceeds with complete C‐2 regioselectivity by using quinine derived bifunctional thiourea tertiary amine as a catalyst.
ChemInform Abstract: Copper‐Catalyzed Stereoselective Oxytrifluoromethylation of Propargyl Amides for the Construction of Oxazolines.
Authors: Wang Yanan , Jiang Min , Liu Jin‐Tao 
Published: September 2015

AbstractBy changing the copper catalyst and reaction conditions, E or Z isomers are formed exclusively in the reaction of α,α‐dimethylpropargylamides (I), (V), and (VIII) with Togni reagent (II).
ChemInform Abstract: A New Method for the Preparation of 5‐Acylidene and 5‐Imino Substituted Rhodanine Derivatives and Their Antioxidant and Antimicrobial Activities.
Authors: Uengoeren Sevket Hakan , Albayrak Sevil , Guenay Ahmet , Yurtseven Lutfiye , Yurttas Nurguel 
Published: September 2015

AbstractWittig reaction of 4,5‐thiazolidinediones and phosphoranes affords a series of 1,3‐thiazolidin‐4‐one derivatives (32 samples) regio‐ and diastereoselectively.
ChemInform Abstract: Transition‐Metal‐Free C‐3 Arylation of Quinoline‐4‐ones with Arylhydrazines.
Authors: Ravi Makthala , Chauhan Parul , Kant Ruchir , Shukla Sanjeev K. , Yadav Prem. P. 
Published: September 2015

AbstractArylhydrazines are used as aryl radical sources and air as oxidant in the mild procedure which does not require any prefunctionalization or N‐protection of the starting quinolines.
ChemInform Abstract: Synthesis of Polycyclic Nitrogen Heterocycles via Cascade Pd‐Catalyzed Alkene Carboamination/Diels—Alder Reactions.
Authors: White Derick R. , Wolfe John P. 
Published: September 2015

AbstractVarious amine substrates are treated with bromodienes in the presence of PHOS ligands (I)‐(III).
ChemInform Abstract: Preparation and Reactions of 4‐Iodobutyl Pinacolborate. Synthesis of Substituted Alkyl and Aryl Pinacolboronates via 4‐Iodobutyl Pinacolborate Utilizing Tetrahydrofuran as the Leaving Group.
Authors: Murphy Chris L. , Hall Aaron , Roberts Emily J. , Ryan Matthew D. , Clary Jacob W. , Singaram Bakthan 
Published: September 2015

AbstractThe mild method offers significant improvement compared to previous procedures in terms of operational simplicity as well as costs and environmental impact of the reagents used.
ChemInform Abstract: LiOOt‐Bu as a Terminal Oxidant in a Titanium Alkoxide‐Mediated [2 + 2 + 2] Reaction Cascade.
Authors: Kim Wan Shin , Aquino Claudio , Mizoguchi Haruki , Micalizio Glenn C. 
Published: September 2015

AbstractTermination of the Ti(OiPr)4‐promoted [2 + 2 + 2] cycloaddition reaction of internal alkynes and enynes of type (II) with LiOOtBu is examined to yield angularly substituted hydrindanes (III).
ChemInform Abstract: BuLi‐Triggered phospha‐Brook Rearrangement: Efficient Synthesis of Organophosphates from Ketones and Aldehydes.
Authors: Pallikonda Gangaram , Santosh Ranga , Ghosal Subhas , Chakravarty Manab 
Published: September 2015

AbstractBuLi promoted mild reactions of activated/unactivated ketones and aldehydes with diethyl phosphite give aromatic and allylic phosphates in good yields.
ChemInform Abstract: Strongylophorines, Meroditerpenoids from the Marine Sponge Petrosia corticata, Function as Proteasome Inhibitors
Authors: Noda Ai , Sakai Eriko , Kato Hikaru , Losung Fitje , Mangindaan Remy E. P. , de Voogd Nicole J. , Yokosawa Hideyoshi , Tsukamoto Sachiko 
Published: September 2015

Abstractisolation and structure elucidation
Elektrochemisches Verhalten von Elektrodenmaterialien in Schmelzen von Kalk‐Natron‐Silicatgläsern
Authors: Finkenberger Johannes , Deinhardt Anika , Kron Johanna , Kilo Martin , Ballweg Thomas , Meinhardt Jürgen 
Published: September 2015

AbstractDie elektrochemische Stabilität von verschiedenen Elektrodenmaterialien, die zur Entfernung von Eisen aus Kalk‐Natron‐Glasschmelzen verwendet werden sollen, wurde untersucht. Als Elektrodenmaterialien wurden Kohlenstoff, Molybdän, Platin und Zinnoxid eingesetzt. Die Untersuchungen wurden bei einer Temperatur von 1400 °C unter realitätsnahen Bedingungen, d.h. bei Atmosphäre mit einem Sauerstoffpartialdruck, ähnlich wie in einer Glaswanne, durchgeführt. Nach verschiedenen Reaktionsdauern wurden die Elektroden sowie die Grenzfläche zum Glas mittels visueller Inspektion sowie REM/EDX charakterisiert.
Tunneling and Parity Violation in Trisulfane (HSSSH): An Almost Ideal Molecule for Detecting Parity Violation in Chiral Molecules
Authors: Fábri Csaba , Horný Ľuboš , Quack Martin 
Published: September 2015

AbstractMeasuring the parity‐violating energy difference ΔpvE between the enantiomers of chiral molecules is a major challenge of current physical‐chemical stereochemistry. An important step towards this goal is to identify suitable molecules for such experiments by means of theory. This step has been made by calculations for the complex dynamics of tunneling and electroweak quantum chemistry of parity violation in the “classic” molecule trisulfane, HSSSH, which satisfies the relevant conditions for experiments almost ideally, as the molecule is comparatively simple and parity violation clearly dominates over tunneling in the ground state. At the same time, the barrier for stereomutation is easily overcome by the S−H infrared chromophore.
Determination of serum brassicasterol in spontaneously hypertensive rats stroke‐prone fed a high‐ergosterol diet by ultra performance liquid chromatography
Authors: Ohtsubo Takaaki , Kageyama Ryo , Koseki Yuji , Hagi Junya , Kotani Akira , Yamamoto Kazuhiro , Kusu Fumiyo , Miura Tsuyoshi , Hakamata Hideki 
Published: September 2015

A method for the determination of ergosterol, brassicasterol, and cholesterol has been developed by ultra performance liquid chromatography with ultraviolet detection (UPLC‐UV). Using an ODS column and a mobile phase of acetonitrile‐water (95:5, v/v), we found that the peak area was linearly related to the amount of sterols injected, ranging from 1.5 to 100 μmol/L (r ≥ 0.998), except for cholesterol (2.5–400 μmol/L). Repeated injection showed that the relative standard deviation (RSD) at 50 μmol/L of sterols was less than 7.1% (intra‐day,n = 6) and 13% (inter‐day,n = 3). Ergosterol and brassicasterol in rat serum spiked at four concentration levels (16, 25, 100, 250 μmol/L) was determined by the internal standard (IS) method using campesterol as an IS with the recovery of more than 88.8% and the RSD (n = 5) of less than 12.5%.Practical applications: This method has been applied to determine the serum ergosterol and brassicasterol concentration in spontaneously hypertensive rats stroke‐prone (SHRSP rats) fed a high‐ergosterol diet containing 1% ergosterol. The results indicate that no apparent peak for ergosterol was observed, whereas the serum brassicasterol concentration was increased by the ergosterol‐feeding. Brassicasterol was confirmed by electrospray ionization triple quadrupole tandem mass spectrometry after derivatization to picolinyl esters. In addition, brassicasterol‐d1was detected after oral administration of ergosterol‐d1to SHRSP rats by ion‐trap time‐of‐flight mass spectrometry. Because SHRSP rats are known as an experimental animal model of phytosterolemia, it has been expected that ergosterol is absorbed and converted to brassicasterol. In summary, the current method provides an experimental tool to help understand ergosterol absorption and metabolism.A method for the determination of ergosterol, brassicasterol, and cholesterol has been developed by UPLC‐UV. We found that a high‐ergosterol diet induces the elevation of serum brassicasterol in SHRSP rats.
Synthesis of Benzophenone Nucleosides and Their Photocatalytic Evaluation for [2+2] Cycloaddition in Aqueous Media
Authors: Gaß Nadine , Wagenknecht Hans‐Achim 
Published: September 2015

AbstractFour benzophenone nucleosides that are para‐substituted (–NH2, –NMe2, –OMe, and –Me) in relation to the carbonyl group were synthesized and characterized by their optical properties. The electron‐donating character of the substituents influenced the optical properties of these nucleosides, especially the bathochromic shift of the charge‐transfer band in their UV/Vis absorption spectra. The solubility of the synthetic nucleosides in aqueous solution allowed for a photocatalytic intramolecular [2+2] cycloaddition of a quinolone substrate to take place in H2O/MeCN by irradiating the mixture with 365 nm light‐emitting diode (LED) lamps. The MeO‐ and Me‐substituted benzophenone nucleosides were subjected to these reaction conditions in substoichiometric amounts. After prolonged irradiation times, substrate conversions competed with product decomposition. On the basis of our results, we determined that the Me‐substituted benzophenone nucleoside has potential applications in the development of photocatalytically active DNAzymes for both in vivo applications in chemical biology and enantioselective photocatalysis in aqueous solutions.
Synthesis of Ag Nanoparticle Doped MnO2/GO Nanocomposites at a Gas/Liquid Interface and its Application in H2O2 Detection
Authors: Zhang Jian , Rao Dejiang , Zheng Jianbin 
Published: September 2015

AbstractAg/MnO2/GO nanocomposites were synthesized via the method of gas/liquid interface based on silver mirror reaction, and a non‐enzymatic H2O2 sensor was fabricated through immobilizing Ag/MnO2/GO nanocomposites on GCE. The composition and morphology of the nanocomposites were studied by energy‐dispersive X‐ray spectroscopy (EDS), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). Electrochemical investigation indicated that it exhibited a favorable performance for the H2O2 detection. Its linear detection range was from 3 μM to 7 mM with a correlation coefficient of 0.9960; the sensitivity was 105.40 μA mM−1 cm−2 and the detection limit was estimated to be 0.7 μM at a signal‐to‐noise ratio of 3.