bluuebunny/crossref_metadata_2025_split huggingface dataset:
Supervised neighborhood preserving embedding for feature extraction and its application for soft sensor modeling
Authors: Yuan Xiaofeng , Ge Zhiqiang , Ye Lingjian , Song Zhihuan 
Published: July 2016

AbstractNeighborhood preserving embedding (NPE) is a useful tool for learning the manifold of high‐dimensional data. As a linear approximation of nonlinear locally linear embedding, NPE can be applied to dimensionality reduction by neighborhood preserving. However, the original NPE algorithm is an unsupervised method, which extracts features without any reference to the output information. In this paper, a supervised NPE framework is proposed for output‐related feature extraction in soft sensor applications. In the supervised NPE framework, the output information is utilized to guide the procedures for constructing the adjacent graph and calculating the weight matrix, with which the intrinsic structure of the data can be better described. For performance evaluation of the proposed method, experiments on a numerical example and an industrial debutanizer column process are carried out. The results show the effectiveness of the proposed framework.
Lanthanide Tetrazolate Complexes Combining Single‐Molecule Magnet and Luminescence Properties: The Effect of the Replacement of Tetrazolate N3 by β‐Diketonate Ligands on the Anisotropy Energy Barrier
Authors: Jiménez Juan‐Ramón , Díaz‐Ortega Ismael F. , Ruiz Eliseo , Aravena Daniel , Pope Simon J. A. , Colacio Enrique , Herrera Juan Manuel 
Published: July 2016

AbstractThree new sets of mononuclear LnIII complexes of general formulas [LnL3]⋅CH3OH [LnIII=Yb (1), Er (2), Dy (3), Gd (4), and Eu (5)], [LnL2(tmh)(CH3OH)]⋅n H2O⋅m CH3OH [LnIII=Yb (1 b), Er (2 b), Dy (3 b), Gd (4 b)], and [LnL2(tta)(CH3OH)]⋅CH3OH [LnIII=Yb (1 c), Er (2 c), Dy (3 c), Gd (4 c)] were prepared by the reaction of Ln(CF3SO3)⋅n H2O salts with the tridentate ligand 2‐(tetrazol‐5‐yl)‐1,10‐phenanthroline (HL) and, for the last two sets, additionally with the β‐diketonate ligands 2,2,6,6‐tetramethylheptanoate (tmh) and 2‐thenoyltrifluoroacetonate (tta), respectively. In the [LnL3]⋅CH3OH complexes the LnIII ions are coordinated to three phenanthroline tetrazolate ligands with an LnN9 coordination sphere. Dynamic ac magnetic measurements on 1–3 reveal that these complexes only exhibit single‐molecule magnet (SMM) behavior when an external dc magnetic field is applied, with Ueff values of 11.7 K (1), 16.0 K (2), and 20.2 K (3). When the tridentate phenanthroline tetrazolate ligand is replaced by one molecule of methanol and the β‐diketonate ligand tmh (1 b–3 b) or tta (1 c–3 c), a significant increase in Ueff occurs and, in the case of the DyIII complexes 3 b and 3 c, out‐of‐phase χ′′ signals below 15 and 10 K, respectively, are observed in zero dc magnetic field. CASSCF+RASSI ab initio calculations performed on the DyIII complexes support the experimental results. Thus, for 3 the ground Kramers’ doublet is far from being axial and the first excited state is found to be very close in energy to the ground state, so the relaxation barrier in this case is almost negligible. Conversely, for 3 b and 3 c, the ground Kramers’ doublet is axial with a small quantum tunneling of the magnetization, and the energy difference between the ground and first Kramers’ doublets is much higher, which allows these compounds to behave as SMMs at zero field. Moreover, these calculations support the larger Ueff observed for 3 b compared to 3 c. Additionally, the solid‐state photophysical properties of 1, 2, 4, and 5 show that the phenanthroline tetrazolate ligand can act as an effective antenna to sensitize the characteristic YbIII, ErIII, and EuIII emissions through an energy‐transfer process.
Boron Lewis Acid‐Catalyzed Hydroboration of Alkenes with Pinacolborane: BArF3 Does What B(C6F5)3 Cannot Do!
Authors: Yin Qin , Kemper Sebastian , Klare Hendrik F. T. , Oestreich Martin 
Published: July 2016

AbstractThe transition‐metal‐free hydroboration of various alkenes with pinacolborane (HBpin) initiated by tris[3,5‐bis(trifluoromethyl)phenyl]borane (BArF3) is reported. The choice of the boron Lewis acid is crucial as the more prominent boron Lewis acid tris(pentafluorophenyl)borane (B(C6F5)3) is reluctant to react. Unlike B(C6F5)3, BArF3 is found to engage in substituent redistribution with HBpin, resulting in the formation of ArFBpin and the electron‐deficient diboranes [H2BArF]2 and [(ArF)(H)B(μ‐H)2BArF2]. These in situ‐generated hydroboranes undergo regioselective hydroboration of styrene derivatives as well as aliphatic alkenes with cis diastereoselectivity. Another ligand metathesis of these adducts with HBpin subsequently affords the corresponding HBpin‐derived anti‐Markovnikov adducts. The reactive hydroboranes are regenerated in this step, thereby closing the catalytic cycle.
ChemInform Abstract: Bi2Fe4O9: Structural Changes from Nano‐ to Micro‐Crystalline State.
Authors: Kirsch Andrea , Murshed M. Mangir , Gaczynski Piotr , Becker Klaus‐Dieter , Gesing Thorsten M. 
Published: July 2016

AbstractNanocrystalline Bi2Fe4O9 is prepared by the polyol‐mediated reaction of Bi(NO3)3, Fe(NO3)3, and NaOH (1:2:4) in diethylene glycol (423 K, 2.5 h) after which stearic acid is added.
ChemInform Abstract: Structural Studies of CaAl12O19, SrAl12O19, La2/3+δAl12‐δO19, and CaAl10NiTiO19 with the Hibonite Structure; Indications of an Unusual Type of Ferroelectricity.
Authors: Li Jun , Medina Elena A. , Stalick Judith K. , Sleight Arthur W. , Subramanian M. A. 
Published: July 2016

AbstractThe title hibonite‐type compounds are prepared by repeated firing of appropriate quantities of CaCO3, SrCO3, La2O3, NiO, Al2O3, and TiO2 in air (1300 °C for CaAl12O19, 1500 °C for all other compounds).
ChemInform Abstract: Synthesis and Crystal Structure of New K and Rb Selenido/Tellurido Ferrate Cluster Compounds.
Authors: Stueble Pirmin , Berroth Angela , Roehr Caroline 
Published: July 2016

AbstractThe FeII/III mixed cluster compounds Rb7[Fe4Te8], K7[Fe4Te8], K6[Fe4Se8], and K5Fe2Te5 are prepared by solid state reaction of stoichiometric amounts of the elements (Al2O3 crucibles sealed in steel autoclaves, 800—900 °C).
ChemInform Abstract: High Dielectric Constant and Capacitance in Ultrasmall (2.5 nm) SrHfO3 Perovskite Nanoparticles Produced in a Low Temperature Non‐Aqueous Sol—Gel Route.
Authors: Karmaoui Mohamed , Ramana E. Venkata , Tobaldi David M. , Lajaunie Luc , Graca Manuel P. , Arenal Raul , Seabra Maria P. , Labrincha Joao A. , Pullar Robert C. 
Published: July 2016

AbstractMonodisperse, ultra‐small, perovskite‐type SrHfO3 nanocrystals are synthesized from solutions of metallic strontium and hafnium isopropoxide in anhydrous benzyl alcohol (autoclave, 220 °C, 48 h).
ChemInform Abstract: Two New Ternary Chalcogenides Ba2ZnQ3 (Q: Se, Te) with Chains of ZnQ4 Tetrahedra: Syntheses, Crystal Structure, and Optical and Electronic Properties.
Authors: Prakash Jai , Mesbah Adel , Beard Jessica , Rocca Dario , Lebegue Sebastien , Malliakas Christos D. , Ibers James A. 
Published: July 2016

AbstractSingle crystals of Ba2ZnQ3 (Q: Se, Te) are obtained by solid‐state reactions of the elements in stoichiometric quantities (1173 K, ≈4 d).
ChemInform Abstract: Construction of Quaternary Stereogenic Carbon Centers Through Copper‐Catalyzed Enantioselective Allylic Alkylation of Azoles.
Authors: Ohmiya Hirohisa , Zhang Heng , Shibata Saori , Harada Ayumi , Sawamura Masaya 
Published: July 2016

AbstractA highly enantioselective reaction of 1,3‐benzthiazole, 1,3‐benzoxazole, and 1,3‐oxazole derivatives with γ,γ‐disubstituted primary allylic phosphonates is described offering access to alkylation products with an all‐carbon quarternary stereogenic centre at the position α to the heteroaromatic ring.
ChemInform Abstract: Asymmetric Broensted Acid Catalyzed Substitution of Diaryl Methanols with Thiols and Alcohols for the Synthesis of Chiral Thioethers and Ethers.
Authors: Chatupheeraphat Adisak , Liao Hsuan‐Hung , Mader Steffen , Sako Makoto , Sasai Hiroaki , Atodiresei Iuliana , Rueping Magnus 
Published: July 2016

AbstractA mild reaction procedure is developed which offers access to benzylic ethers and thioethers in high yields and with high enantioselectivities.
ChemInform Abstract: Broensted Acid‐Catalyzed [3 + 2] Cyclodimerization of 3‐Alkyl‐ 2‐vinylindoles Leading to the Diastereoselective Construction of a Pyrroloindole Framework.
Authors: Yin Lei , Wang Yang , Sun Meng , Shi Feng 
Published: July 2016

AbstractThe homodimerization according to the title reaction provides pyrroloindoles in high yields whereas attempts upon the heterodimerization of two different 3‐alkyl‐2‐vinylindoles deliver a mixture of homo‐ and heterodimerized products.
ChemInform Abstract: Unexplored Reactivity of N‐Alkyl Unsaturated Imines: A Simple Procedure for Producing Optically Active 1,3‐Diamines via a Stereocontrolled Formal [4 + 2] and [4 + 2 + 2] Iminocycloaddition.
Authors: Pradipta Ambara R. , Tanaka Katsunori 
Published: July 2016

AbstractA stereocontrolled synthesis of substituted chiral hexahydropyrimidines and triazacyclooctanes of type (XIX) is presented.
ChemInform Abstract: Rapid Access to Unsymmetrical Tolanes and Alkynones by Sequentially Palladium‐Catalyzed One‐Pot Processes.
Authors: Goetzinger Alissa C. , Mueller Thomas. J. J. 
Published: July 2016

AbstractThis convenient and modular approach towards unsymmetrical arylalkynes is characterized by utilization of readily available starting materials, mild conditions and short reaction times.
ChemInform Abstract: Chiral Lewis Base‐Catalyzed, Enantioselective Reduction of Unprotected β‐Enamino Esters with Trichlorosilane.
Authors: Ye Jianheng , Wang Chao , Chen Lin , Wu Xinjun , Zhou Li , Sun Jian 
Published: July 2016

AbstractConditions for the reduction of β‐aryl substituted enamino esters are developed which provide chiral β‐aryl‐β‐amino esters in high yields and with very high enantiomeric excesses.
ChemInform Abstract: Ligand‐Controlled Divergent Cross‐Coupling Involving Organosilicon Compounds for Thioether and Thioester Synthesis.
Authors: Qiao Zongjun , Jiang Xuefeng 
Published: July 2016

AbstractVarious aryl‐ and alkyl thiosulfates are used for a base‐free, odorless reaction with triethoxy(het)arylsilanes, and depending on the reaction conditions thioethers or, in the presence of carbon monoxide, thioesters are formed in moderate to often high yields.
ChemInform Abstract: Hydroxymethylation Beyond Carbonylation: Enantioselective Iridium‐Catalyzed Reductive Coupling of Formaldehyde with Allylic Acetates via Enantiotopic π‐Facial Discrimination.
Authors: Garza Victoria J. , Krische Michael J. 
Published: July 2016

Abstractaffording primary homoallylic alcohols with excellent control of regio‐ and enantioselectivity
ChemInform Abstract: Stereocontrolled (Me3Si)3SiH‐Mediated Radical and Ionic Hydride Transfer in Synthesis of 2,3,5‐Trisubstituted THF.
Authors: Grelaud Simon , Desvergnes Valerie , Landais Yannick 
Published: July 2016

AbstractThe two‐step procedure has a broad substrate scope.
ChemInform Abstract: The Squaramide‐Catalyzed Asymmetric Michael/Cyclization Tandem Reaction for the Synthesis of Chiral Trifluoromethylated Hydroxyimino Tetrahydrobenzofuranones.
Authors: Liu Wei , Lai Xiaoyan , Zha Gaofeng , Xu Yan , Sun Panpan , Xia Tao , Shen Yongcun 
Published: July 2016

AbstractThis is the first application of β,β‐disubstituted nitroolefins in a tandem Michael addition/cyclization reaction.
ChemInform Abstract: An Efficient Isoprenylation of Xanthones at the C1 Position by Utilizing Anion‐Accelerated Aromatic Oxy‐Cope Rearrangement.
Authors: Fujimoto Yuuki , Watabe Yu , Yanai Hikaru , Taguchi Takeo , Matsumoto Takashi 
Published: July 2016

AbstractA novel 2‐step procedure for the ipso‐isoprenylation of 1‐haloxanthones via isoprenyl‐Grignard addition to the keto group followed by anion‐accelerated oxy‐Cope rearrangement is presented.
ChemInform Abstract: Base Catalyzed Intermolecular Cyclization of N‐Protected O‐Amino Benzaldehyde/Acetophenone with Phosphorus/Sulfur Based Allenes: Facile Synthesis of Substituted Quinolines.
Authors: Anitha Mandala , Gangadhararao G. , Kumara Swamy K. C. 
Published: July 2016

AbstractBenzoyl‐protected 2‐aminobenzaldehydes react with allenylphosphonates via intermolecular cyclization, dehydration, and benzoyl group rearrangement followed by a novel phosphoryl group migration.
ChemInform Abstract: Efficient Synthesis of 2‐Acylquinolines Based on an Aza‐Vinylogous Povarov Reaction.
Authors: Bianchini Giulia , Ribelles Pascual , Becerra Diana , Ramos M. Teresa , Menendez J. Carlos 
Published: July 2016

AbstractThe aza‐vinylogous Povarov reaction of α‐ketoimines with α,β‐unsaturated hydrazones affords the desired tetrahydroquinolines in good yields and with good cis/trans diastereoselectivity.
ChemInform Abstract: A Facile One‐Pot Synthesis of Benzo[b]benzofuro‐ and Benzo[b]benzothieno[3,2‐h][1,6]naphthyridines.
Authors: Wang Dao‐Lin , Zhou Ting , Xing Jin‐Juan , Qiang Jian‐Hua , Liu Lin 
Published: July 2016

AbstractAn efficient tandem Thorpe—Ziegler‐type heterocyclization leads to the entitled compounds (III) in an one‐pot procedure with high yields.
ChemInform Abstract: Synthesis of 2‐Aminoquinazolinones via Carbonylative Coupling of ortho‐Iodoanilines and Cyanamide.
Authors: Aakerbladh Linda , Odell Luke R. 
Published: July 2016

AbstractThe CO stream is generated on‐site ex‐situ by thermal decomposition of Mo(CO)6 in the presence of DBU (dioxane, 65°C, 20 h; step 1) in a second, connected chamber.
ChemInform Abstract: Superparamagnetic Copper Ferrite Nanoparticles Catalyzed One Step Regioselective Synthesis of Dibenzodiazepinones via Ligand and Base Free Ullmann Type Coupling Reaction.
Authors: Jamatia Ramen , Gupta Ajay , Pal Amarta Kumar 
Published: July 2016

AbstractThe nanoparticle catalyst efficiently catalyzes the cyclization affording target compounds (III) within short reaction times and with high regioselectivity.
ChemInform Abstract: Total Synthesis of Protosappanin A and Its Derivatives via Palladium Catalyzed ortho C—H Activation/C—C Cyclization under Microwave Irradiation.
Authors: Liu Jiaqi , Zhou Xuan , Wang Chenglong , Fu Wanyong , Chu Wenyi , Sun Zhizhong 
Published: July 2016

AbstractA simple approach towards dibenzooxepinones is developed.
ChemInform Abstract: Bis(acetylacetonato)Ni(II)/NaBHEt3‐Catalyzed Hydrosilylation of 1,3‐Dienes, Alkenes and Alkynes.
Authors: Srinivas Venu , Nakajima Yumiko , Ando Wataru , Sato Kazuhiko , Shimada Shigeru 
Published: July 2016

AbstractCommercially available Ni(acac)2 is introduced as an efficient catalyst for hydrosilylation reactions of various types of unsaturated compounds in the presence of NaBHEt3.
ChemInform Abstract: Highly Efficient Synthesis of α‐Aminophosphonates Catalyzed by Hafnium(IV) Chloride.
Authors: Li Xiao‐Chuan , Gong Shan‐Shan , Zeng De‐Yun , You Yue‐Hai , Sun Qi 
Published: July 2016

AbstractAn efficient one‐pot method for the three‐component condensation of dialkylphosphites, aldehydes, and amines to produce α‐aminophosphonates in high yields is presented.
ChemInform Abstract: Palladium‐Catalyzed Phosphonyldifluoromethylation of Alkenes with Bromodifluoromethylphosphonate.
Authors: Feng Zhang , Xiao Yu‐Lan , Zhang Xingang 
Published: July 2016

AbstractAn efficient procedure is elaborated for the phosphonyldifluoromethylation of alkenes with bromide (II).
ChemInform Abstract: Facile O‐Glycosylation of Glycals Using Glu‐Fe3O4‐SO3H, a Magnetic Solid Acid Catalyst.
Authors: Thombal Raju S. , Jadhav Vrushali H. 
Published: July 2016

AbstractThe new catalytic system is conveniently and eco‐friendly synthesized and utilized for the synthesis of 2‐deoxy galactosides/glucosides with good yields and selectivity.
ChemInform Abstract: Ion Exchange Conversion of Solid Electrolyte, Potassium Sodiostannate, into Isomorphous Metastable Sodium Stannate.
Authors: Butova Vera V. , Shukaev Igor L. 
Published: July 2016

AbstractImpedance measurements indicate high ionic conductivity of the layered compound K0.72Na0.24Sn0.76O2.
ChemInform Abstract: The Application of Graphene and Its Derivatives to Energy Conversion, Storage, and Environmental and Biosensing Devices
Authors: Ali Tahir Asif , Ullah Habib , Sudhagar Pitchaimuthu , Asri Mat Teridi Mohd , Devadoss Anitha , Sundaram Senthilarasu 
Published: July 2016

AbstractReview: [329 refs.
Endurance of larch forest ecosystems in eastern Siberia under warming trends
Authors: Sato Hisashi , Kobayashi Hideki , Iwahana Go , Ohta Takeshi 
Published: July 2016

AbstractThe larch (Larix spp.) forest in eastern Siberia is the world's largest coniferous forest. Its persistence is considered to depend on near‐surface permafrost, and thus, forecast warming over the 21st century and consequent degradation of near‐surface permafrost is expected to affect the larch forest in Siberia. However, predictions of these effects vary greatly, and many uncertainties remain about land – atmosphere interactions within the ecosystem. We developed an integrated land surface model to analyze how the Siberian larch forest will react to current warming trends. This model analyzed interactions between vegetation dynamics and thermo‐hydrology, although it does not consider many processes those are considered to affect productivity response to a changing climate (e.g., nitrogen limitation, waterlogged soil, heat stress, and change in species composition). The model showed that, under climatic conditions predicted under gradual and rapid warming, the annual net primary production of larch increased about 2 and 3 times, respectively, by the end of the 21st century compared with that in the previous century. Soil water content during the larch‐growing season showed no obvious trend, even when surface permafrost was allowed to decay and result in subsurface runoff. A sensitivity test showed that the forecast temperature and precipitation trends extended larch leafing days and reduced water shortages during the growing season, thereby increasing productivity. The integrated model also satisfactorily reconstructed latitudinal gradients in permafrost presence, soil moisture, tree leaf area index, and biomass over the entire larch‐dominated area in eastern Siberia. Projected changes to ecosystem hydrology and larch productivity at this geographical scale were consistent with those from site‐level simulation. This study reduces the uncertainty surrounding the impact of current climate trends on this globally important carbon reservoir, and it demonstrates the need to consider complex ecological processes to make accurate predictions.
Steep, coincident, and concordant clines in mitochondrial and nuclear‐encoded genes in a hybrid zone between subspecies of Atlantic killifish,Fundulus heteroclitus
Authors: McKenzie Jessica L. , Dhillon Rashpal S. , Schulte Patricia M. 
Published: July 2016

AbstractSteep genetic clines resulting from recent secondary contact between previously isolated taxa can either gradually erode over time or be stabilized by factors such as ecological selection or selection against hybrids. We used patterns of variation in 30 nuclear and two mitochondrialSNPs to examine the factors that could be involved in stabilizing clines across a hybrid zone between two subspecies of the Atlantic killifish,Fundulus heteroclitus. Increased heterozygote deficit and cytonuclear disequilibrium in populations near the center of the mtDNAcline suggest that some form of reproductive isolation such as assortative mating or selection against hybrids may be acting in this hybrid zone. However, only a small number of loci exhibited these signatures, suggesting locus‐specific, rather than genomewide, factors. Fourteen of the 32 loci surveyed had cline widths inconsistent with neutral expectations, with twoSNPs in the mitochondrial genome exhibiting the steepest clines. Seven of the 12 putatively non‐neutral nuclear clines were forSNPs in genes related to oxidative metabolism. Among these putatively non‐neutral nuclear clines,SNPs in two nuclear‐encoded mitochondrial genes (SLC25A3 andHDDC2), as well asSNPs in the myoglobin, 40S ribosomal protein S17, and actin‐bindingLIMprotein genes, had clines that were coincident and concordant with the mitochondrial clines. When hybrid index was calculated using this subset of loci, the frequency distribution of hybrid indices for a population located at the mtDNAcline center was non‐unimodal, suggesting selection against advanced‐generation hybrids, possibly due to effects on processes involved in oxidative metabolism.
Bifunctional Ni‐ZSM‐5 Catalysts for the Pyrolysis and Hydropyrolysis of Biomass
Authors: Gamliel David P. , Bollas George M. , Valla Julia A. 
Published: July 2016

AbstractIn this work, we explore pyrolysis options, namely, high pressure, H2, and metal‐loaded ZSM‐5 catalysts, to improve the limited deoxygenation capacity and reduce the excessive production of solids in biomass catalytic fast pyrolysis (CFP). Specifically, we explore the product selectivity of Miscanthus x giganteus CFP in inert or H2‐rich environments, pressures up to 450 psig, and over ZSM‐5 and Ni‐ZSM‐5. We show that higher pressures promote decarboxylation reactions, reduce the yields to liquids, and enhance the formation of solid products. Ni‐ZSM‐5 promotes decarboxylation, dehydration, and methanation reactions. The cofeeding of H2 at high pressures increases the selectivity to monoaromatic hydrocarbons with a parallel enhancement of the yield to saturated products. Solid products are reduced drastically in H2‐rich, high‐pressure experiments, and the CH4 selectivity increases. Based on these experimental findings, we present a reaction scheme that describes the impact of pressure, H2, and Ni on the product selectivity of biomass CFP.
Smoothed‐profile method for momentum and heat transfer in particulate flows
Authors: Romanò Francesco , Kuhlmann Hendrik C. 
Published: July 2016

SummaryThe smoothed‐profile method for the motion of solid bodies suspended in a fluid phase is investigated when combined with a high‐order spatial discretization. The performance of the combined method is tested for a wide range of flow and geometry parameters as well as for static and for moving particles. Moreover, a sensitivity analysis is conducted with respect to the smoothed‐profile function. The algorithm is extended to include thermal effects in Boussinesq approximation. Several benchmark problems are considered to demonstrate the potential of the technique. The implementation of the energy equation is verified by dedicated tests. All simulations are compared with either theoretical, numerical, or experimental data. The results demonstrate the accuracy and efficiency of the smoothed‐profile method for non‐isothermal problems in combination with a discontinuous finite‐element solver for the fluid flow, which allows for a flexible handling of the grid and the order of spectral approximation in each element. Copyright © 2016 John Wiley & Sons, Ltd.