bluuebunny/crossref_metadata_2025_split huggingface dataset:
Barium Carbonate Nanoparticles as Synergistic Catalysts for the Oxygen Reduction Reaction on La0.6Sr0.4Co0.2Fe0.8O3−δ Solid‐Oxide Fuel Cell Cathodes
Authors: Hong Tao , Brinkman Kyle S. , Xia Changrong 
Published: January 2016

AbstractBarium carbonate (BaCO3) nanoparticles have been demonstrated to have excellent synergistic catalytic activity for the oxygen reduction reaction on La0.6Sr0.4Co0.2Fe0.8O3−δ (LSCF) and LSCF‐SDC (SDC=Sm0.2Ce0.8O1.9), which are typical mixed conducting electrode materials for solid‐oxide fuel cells (SOFCs). The BaCO3 nanoparticles were deposited into the porous electrodes through an infiltration/impregnation method with barium acetate as the precursor. Electrochemical impedance analysis indicated that BaCO3 dramatically reduced the resistance associated with the low‐frequency response, which suggests that BaCO3 greatly enhances the kinetics of the surface reaction process. Electrical conductivity relaxation experiments revealed that BaCO3 particles enlarged the oxygen chemical surface exchange coefficient by a factor of up to eight. As a result, the interfacial polarization resistance of both the LSCF and LSCF‐SDC electrodes was greatly reduced, from 0.28 and 0.13 to 0.12 and 0.047 Ω cm2, respectively, at 700 °C. In addition, the single‐cell performance was also improved and demonstrated peak power density from 0.66 and 0.71 to 0.73 and 0.81 W cm2 for the LSCF and LSCF‐SDC cathodes, respectively, at 700 °C. The LSCF electrode infiltrated with BaCO3 nanoparticles also exhibited higher stability than the bare LSCF electrode in tests conducted under typical SOFC conditions for over 340 h of operation.
ChemInform Abstract: Synthesis of P‐Stereogenic Phosphoramidite and Phosphorodiamidite Ligands and Their Application in Asymmetric Catalysis.
Authors: Schmitz Christian , Leitner Walter , Francio Giancarlo 
Published: January 2016

AbstractA library of novel P‐stereogenic phosphoramidite and phosphorodiamidite ligands based on chiral Betti bases are synthesized (not shown) and applied to Rh‐catalyzed asymmetric hydrogenation as well as Pd‐catalyzed allylic amination and a Ni‐catalyzed hydrovinylation.
ChemInform Abstract: Asymmetric Multicomponent Sulfa‐Michael/Mannich Cascade Reaction: Synthetic Access to 1,2‐Diamino‐3‐organosulfur Compounds and 2‐Nitro Allylic Amines.
Authors: Hou Wenduan , Wei Qi , Liu Guisheng , Chen Jing , Guo Jing , Peng Yungui 
Published: January 2016

AbstractA novel asymmetric three‐component sulfa‐Michael/Mannich cascade reaction using a thiourea‐substituted quinine catalyst (UQN) leads to 1‐amino‐2‐nitro‐3‐arylalkyl thioether derivatives (IV) and (IX) with three stereocenters.
ChemInform Abstract: Ruthenium Catalyzed Selective Hydroboration of Carbonyl Compounds.
Authors: Kaithal Akash , Chatterjee Basujit , Gunanathan Chidambaram 
Published: January 2016

AbstractThe Ru‐catalyzed hydroboration of aldehydes (I) and (III) followed by hydrolysis of the intermediate boronate esters with HCl affords primary alcohols (II) and (IV), resp., in high yields.
ChemInform Abstract: Copper‐Catalyzed Cross‐Coupling of Allylboronic Acids with α‐Diazoketones.
Authors: Das Arindam , Wang Dong , Belhomme Marie‐Charlotte , Szabo Kalman J. 
Published: January 2016

AbstractThis allylation reaction proceeds with high regioselectivity to afford the corresponding branched products by retaining the keto functional group of the α‐diazoketone precursor.
ChemInform Abstract: Chiral Recyclable Fluorous Disulfonamide Ligand for Catalytic Enantioselective Cyclopropanation of Allylic Alcohols.
Authors: Kawashima Yuya , Ezawa Tetsuya , Yamamura Mai , Harada Taisuke , Noguchi Takuya , Miura Tsuyoshi , Imai Nobuyuki 
Published: January 2016

AbstractThe products are obtained in very high yields and with high enantiomeric excess.
ChemInform Abstract: Enantioselective Synthesis of 4,4′‐Biaryl‐BINOLs from Arynes and β‐Diketones.
Authors: Okuma Kentaro , Horigami Kenta , Nagahora Noriyoshi , Shioji Kosei 
Published: January 2016

AbstractThe title process is achieved following a short two‐step procedure consisting of the preparation of 4‐aryl‐substituted naphthols and subsequent oxidation.
ChemInform Abstract: Chiral Substituted 3‐Formylfurans from Carbohydrates: An Expedient Route via N‐Bromosuccinimide (NBS)‐Mediated Electrophilic Cyclization.
Authors: Mal Kanchan , Kaur Amanpreet , Das Indrajit 
Published: January 2016

AbstractThe efficient and general method for the synthesis of the title furans involves a Heck coupling between substituted iodoenones and olefins followed by NBS‐mediated electrophilic cyclization using H2O as a nucleophile.
ChemInform Abstract: Synthesis and Properties of Ethene‐Bridged Terthiophenes.
Authors: Mitsudo Koichi , Sato Hidehiko , Yamasaki Arata , Kamimoto Natsuyo , Goto Jun , Mandai Hiroki , Suga Seiji 
Published: January 2016

AbstractShort synthetic routes to ethene‐bridged terthiophenes such as (IV) and (VII) are elaborated.
ChemInform Abstract: An Efficient Route to 3‐Trifluoromethylpyrazole via Cyclization/1,5‐H Shift and Its Applications in the Synthesis of Bioactive Compounds.
Authors: Wang Yongdong , Han Jing , Chen Jie , Cao Weiguo 
Published: January 2016

AbstractThe method can be applied to synthesize compounds like SC‐560 (IVc) and the precursor of Mavacoxib (IVe).
ChemInform Abstract: Efficient Synthesis of 3‐Alkynyl‐2‐(hydroxymethyl)cyclohex‐2‐en‐1‐ones by a Stork—Danheiser Sequence from Vinylogous Esters and Terminal Alkynes.
Authors: Parida Amarchand , Sharique Mohd. , Kakde Badrinath N. , Ghosh Santanu , Bisai Alakesh 
Published: January 2016

AbstractFurther transformation of the products into isocoumarin derivatives is shown.
ChemInform Abstract: Stereospecific Coupling of Boronic Esters with N‐Heteroaromatic Compounds.
Authors: Llaveria Josep , Leonori Daniele , Aggarwal Varinder K. 
Published: January 2016

AbstractFunctionalized 2‐ and 4‐lithiopyridines as well as 2‐ and 4‐lithioquinolines and 1‐lithioisoquinoline are efficiently coupled with various primary and secondary pinacolates and, in case of 4‐lithiopyridines and 4‐lithioquinolines, even with tertiary pinacolates.
ChemInform Abstract: Cycloaddition of Enamine and Iminium Ion Intermediates Formed in the Reaction of N‐Arylpyrrolidines with T‐HYDRO.
Authors: Rao Gunda Ananda , Periasamy Mariappan 
Published: January 2016

AbstractThe title intermediates react further to give tetracyclic amines [e.g. (II)], cyclic amides [e.g. (III)], or nitromethyl derivatives [e.g. (V)] under different conditions.
ChemInform Abstract: Isolation of Two New Bioactive Sesquiterpene Lactone Glycosides from the Roots of Ixeris dentata
Authors: Park SeonJu , Nhiem Nguyen Xuan , Lee Taek Hwan , Kim Nanyoung , Kim Sun Yeou , Chae Han‐Jung , Kim Seung Hyun 
Published: January 2016

Abstractisolation and structure elucidation of two new sesquiterpene lactone glycosides (I) and (II)
ChemInform Abstract: Two New Sesquiterpenoids from the Root of Strophanthus divaricatus
Authors: Chen Neng‐Hua , Zhang Yu‐Bo , Li Zhen‐Hua , Jiang Jian‐Wei , Li Guo‐Qiang , Wang Guo‐Cai , Li Yao‐Lan 
Published: January 2016

Abstractisolation and structure elucidation of strophanthoids A (I) and B (II)
ChemInform Abstract: Synthesis of (.+‐.)‐(Z)‐2β‐Hydroxy‐14‐hydro‐β‐santalol Employing Tandem Radical Cyclization.
Authors: Ishigami Ken , Yamada Shinya , Watanabe Hidenori 
Published: January 2016

AbstractThe synthesis of the title sesquiterpene (IV), a potent inhibitor of H.
ChemInform Abstract: New Arylalkanones from Horsfieldia macrobotrys, Effective Antidiabetic Agents Concomitantly Inhibiting α‐Glucosidase and Free Radicals.
Authors: Ramadhan Rico , Phuwapraisirisan Preecha 
Published: January 2016

Abstractisolation and structure elucidation of horsfieldone A (I), maingayone D (II), and 8‐C‐β‐D‐glycopyranosylpinocembrin (III)
ChemInform Abstract: Cytotoxic Metabolites Produced by the Endophytic Fungus Aspergillus clavatus
Authors: Wang Jiaming , Bai Gang , Liu Yihan , Wang Hongbin , Li Yu , Yin Wanqiang , Wang Yonglu , Lu Fuping 
Published: January 2016

Abstractisolation and structure elucidation of aspergillusones C (I) and D (II)
ChemInform Abstract: Carbon‐Free Cathodes: A Step Forward in the Development of Stable Lithium—Oxygen Batteries
Authors: Landa‐Medrano Imanol , Pinedo Ricardo , Ortiz‐Vitoriano Nagore , de Larramendi Idoia Ruiz , Rojo Teofilo 
Published: January 2016

AbstractReview: altenatives including metal oxides, noble metals, carbides/nitrides, polymers, and silicenes; 104 refs.
Label‐Free Fluctuation Spectroscopy Based on Coherent Anti‐Stokes Raman Scattering from Bulk Water Molecules
Authors: Rabasovic M. D. , Sisamakis E. , Wennmalm S. , Widengren J. 
Published: January 2016

AbstractNanoparticles (NPs) and molecules can be analyzed by inverse fluorescence correlation spectroscopy (iFCS) as they pass through an open detection volume, displacing fractions of the fluorescence‐emitting solution in which they are dissolved. iFCS does not require the NPs or molecules to be labeled. However, fluorophores in μm–mm concentrations are needed for the solution signal. Here, we instead use coherent anti‐Stokes Raman scattering (CARS) from plain water molecules as the signal from the solution. By this fully label‐free approach, termed inverse CARS‐based correlation spectroscopy (iCARS‐CS), NPs that are a few tenths of nm in diameter and at pM concentrations can be analyzed, and their absolute volumes/concentrations can be determined. Likewise, lipid vesicles can be analyzed as they diffuse/flow through the detection volume by using CARS fluctuations from the surrounding water molecules. iCARS–CS could likely offer a broadly applicable, label‐free characterization technique of, for example, NPs, small lipid exosomes, or microparticles in biomolecular diagnostics and screening, and can also utilize CARS signals from biologically relevant media other than water.
Electronic and Magnetic Properties of Encapsulated MoS2 Quantum Dots: The Case of Noble Metal Nanoparticle Dopants
Authors: Loh Guan Chee 
Published: January 2016

AbstractWith the rise of 2D materials, such as graphene and transition metal dichalcogenides, as viable materials for numerous experimental applications, it becomes more necessary to maintain fine control of their properties. One expedient and efficacious technique to regulate their properties is surface functionalization. In this study, DFT calculations are performed on triangular MoS2 quantum dots (QDs) either partially or completely doped with nanoparticles (NPs) of the noble metals Au, Ag, and Pt. The effects of these dopants on the geometry, electronic properties, magnetic properties, and chemical bonding of the QDs are investigated. The calculations show that the structural stability of the QDs is reduced by Au or Ag dopants, whereas Pt dopants have a contrasting effect. The NPs diminish the metallicity of the QD, the extent of which is contingent on the number of NPs adsorbed on the QD. However, these NPs exert distinctly disparate charge transfer effects—Ag NPs n‐dope the QDs, whereas Au and Pt NPs either n‐ or p‐dope. The molecular electrostatic potential maps of the occupied states show that metallic states are removed from the doping sites. Notwithstanding the decrease of magnetization in all three types of hybrid QD, the distribution of spin density in the Pt‐doped QD is inherently different from that in the other QDs. Bond analyses using the quantum theory of atoms in molecules and the crystal orbital Hamilton population suggest that bonds between the Pt NPs and the QDs are the most covalent and the strongest, followed by the Au−QD bonds, and then Ag−QD bonds. The versatility of these hybrid QDs is further examined by applying an external electric field in the three orthogonal orientations, and comparing their properties with those in the absence of the electric field. There are two primary observations: 1) dopants at the tail, head and tail, and in the fully encased configuration are most effective in modifying the distribution of metallic states if the electric field is absent, and 2) the metallic states in these aforementioned QDs are generally insensitive to the electric field. Conversely, the asymmetric electric effects on the charge transfer in these QDs have to be carefully monitored to allow finer control of their structural stability. This study aptly demonstrates the value of noble metal dopants for manipulating the properties of MoS2 QDs, and shows the versatility of these hybrid QDs as tunable nanodevices. This notably extends the functionality of these nanostructures for applications such as catalysis and nanoelectronics.
Near Infrared Phosphorescent, Non‐oxidizable Palladium and Platinum Perfluoro‐phthalocyanines
Authors: Łapok Łukasz , Obłoza Magdalena , Gorski Alexandr , Knyukshto Valeri , Raichyonok Tamara , Waluk Jacek , Nowakowska Maria 
Published: January 2016

AbstractNew PdII and PtII complexes with a highly electron‐deficient ligand (H2PcF64) were conveniently prepared in a three‐step synthesis. This is the first time that the phosphorescence of phthalocyanines with a H2PcF64 framework has been measured. Based on these measurements, the triplet‐state energies (ET) were directly determined. Transient absorption experiments revealed broad T1→Tn absorption spanning from ca. 350 to ca. 1000 nm and allowed determination of the triplet‐state lifetimes. Removal of the Pd or Pt from the perfluoro‐phthalocyanine resulted in a significant increase of the triplet lifetime for H2PcF64. The very efficient intersystem crossing observed for both PdPcF64 and PtPcF64 leads to residual fluorescence and suppresses the fluorescence lifetimes to less than 50 ps. The absence of Pd and Pt in the perfluoro‐phthalocyanine ligand, viz. H2PcF64, led to a recovery of fluorescence. Cyclic voltamperometry studies pointed to complete resistance of PdPcF64 and PtPcF64 to oxidation and very strong electron affinity, which rendered these materials very good electron acceptors (n‐type materials). The presence of d‐orbital metals such as PdII and PtII in the phthalocyanine ring stabilizes their reduced forms, as indicated by the spectroelectrochemical experiments. PdPcF64 and PtPcF64 easily sensitize singlet oxygen production with very high quantum yields. Both phthalocyanines presented resistance to photodegradation in the solid state under aerobic conditions and under intense irradiation.
Reversal of Orbital Symmetry Control in Electrocyclic Ring Closures through Craig‐Möbius Aromaticity
Authors: Mauksch Michael , Tsogoeva Svetlana B. 
Published: January 2016

AbstractExperimentalists are challenged to find the organometallic thermal electrocyclizations that are computationally predicted to proceed with opposite stereoselectivity compared to their metal‐free parent 4n and 4n+2 π‐electron systems. While ring closure of, for example, s‐cis‐butadiene proceeds conrotatory, an iron alkyl complex formed by replacement of a (CH) unit by an [FeH] metal fragment results in a disrotatory electrocyclization.
Ultrabright Lanthanide Nanoparticles
Authors: Goetz Joan , Nonat Aline , Diallo Abdoulaye , Sy Mohamadou , Sera Ildan , Lecointre Alexandre , Lefevre Christophe , Chan Chi Fai , Wong Ka‐Leung , Charbonnière Loïc J. 
Published: January 2016

AbstractTb‐doped La0.9Tb0.1F3 nanoparticles were prepared by a simple and reproducible microwave‐assisted synthetic protocol in water. The nanoparticles were characterized by XRD, TEM, dynamic light scattering and inductively coupled plasma atomic emission spectroscopy elemental analysis. Eleven ligands with varying coordination and photosensitizing abilities were designed to bind at the surface of the Tb‐doped nanoparticles. The photosensitizing behavior was monitored by electronic absorption spectroscopy and steady‐state and time‐resolved emission spectroscopy. The two most effective photosensitizing ligands were used to isolate and purify the capped nanoparticles. The composition and spectroscopic properties of these nanoparticles were measured, which revealed either 2660 and 5240 ligands per nanoparticle, molar absorptivities of 7.6×106 and 1.6×107 m−1 cm−1 and luminescence quantum yields of 0.29 and 0.13 in water, respectively. These data correspond to exceptional brightness values of 2.2×106 and 2.1×106 m−1 cm−1, respectively. The as‐prepared nanoparticles were imaged in HeLa cells by fluorescence microscopy, which showed their specific localization in lysosomes.
Fostering Self‐Compassion and Loving‐Kindness in Patients With Borderline Personality Disorder: A Randomized Pilot Study
Authors: Feliu‐Soler Albert , Pascual Juan Carlos , Elices Matilde , Martín‐Blanco Ana , Carmona Cristina , Cebolla Ausiàs , Simón Vicente , Soler Joaquim 
Published: January 2016

The aim of this randomized pilot study is to investigate the effects of a short training programme in loving‐kindness and compassion meditation (LKM/CM) in patients with borderline personality disorder. Patients were allocated to LKM/CM or mindfulness continuation training (control group). Patients in the LKM/CM group showed greater changes in Acceptance compared with the control group. Remarkable changes in borderline symptomatology, self‐criticism and self‐kindness were also observed in the LKM/CM group. Mechanistic explanations and therapeutic implications of the findings are discussed.Highlights:

Three weeks of loving‐kindness and compassion meditations increased acceptance of the present‐moment experience in patients with borderline personality disorder.
Significant improvements in the severity of borderline symptoms, self‐criticism, mindfulness, acceptance and self‐kindness were observed after the LKM/CM intervention.
LKM/CM is a promising complementary strategy for inclusion in mindfulness‐based interventions and Dialectical Behavioural Therapy for treating core symptoms in borderline personality disorder.
Copyright © 2016 John Wiley & Sons, Ltd.
Oral health practices and prevalence of dental plaque and gingivitis among Indian adults
Authors: Sreenivasan P.K. , Prasad K.V.V. , Javali S. B. 
Published: January 2016

AbstractThis cross‐sectional survey study evaluated oral hygiene habits in conjunction with whole mouth examinations for dental plaque and gingivitis among adults in India. Subjects across several age groups who provided informed consent [220 male and 158 female (mean age 30.9 years)] were enrolled. All enrolled subjects were interviewed for oral hygiene practices and evaluated by the Turesky modification of the Quigley‐Hein and the Löe‐Silness methods for dental plaque and gingivitis, respectively. Evaluations included oral hygiene parameters, prevalence of dental plaque and gingivitis, and regional differences within the dentition for dental plaque and gingivitis. Results from this study indicate that most subjects (97%) utilized a toothbrush and toothpaste for oral hygiene with a majority (92%) using their right hand to brush their teeth. While 29% reported two or more episodes of daily oral hygiene, a majority (53%) brushed their teeth once daily. Utilization of dental floss and mouthwashes were reported by approximately 1% of this population, and most (73%) reported no dental visits in the preceding 5 years. Whole mouth plaque and gingival scores (average ± standard deviation) for this population were 2.47 ± 0.55 and 1.19 ± 0.31, respectively, with no significant differences between either gender (P > 0.05). Significant correlations (r > 0.44) were observed between plaque and gingival scores for the entire sample, either gender or between age groups (P < 0.001). Analyses indicate that anterior teeth demonstrated lower average scores for dental plaque and gingivitis than posterior and molar regions (P < 0.05). Education was associated with higher plaque and gingival scores: plaque scores [odds ratios; 95% confidence interval; 1.23; 1.01–1.50 and gingival scores odds ratios 1.25; 1.02–1.54]. In summary, results from this study demonstrate the prevalence of dental plaque and gingivitis in the general population and their relationships with demographic characteristics. They reinforce examinations of posterior regions that consistently harbor more plaque and corresponding gingivitis in evaluations of oral health.
Adaptive time delay estimation algorithm for indoor near‐field electromagnetic ranging
Authors: Wang Peng , Zhang Xiaotong , Sun Guolu , Xu Liyuan , Xu Jinwu 
Published: January 2016

SummaryThe near‐field electromagnetic ranging technology exploits the near‐field behavior of radio signals to measure distance in indoor real‐time location system. In this paper, we propose a new adaptive time‐delay estimation algorithm based on maximum correntropy criterion (MCC) and received signal strength indication (RSSI), abbreviated as RSSIMCC. The proposed RSSIMCC algorithm estimates the time delay between the electric and magnetic components of low‐frequency signals in the near field instead of detecting the phase difference. An inaccurate time‐delay estimation value obtained according to the RSSI is used as the initial time delay of adaptive time‐delay estimator, which is not far from the true time delay and can improve the convergence speed. Through the analysis of simulation and experiment results, we conclude that the proposed RSSIMCC algorithm can estimate the time delay with small steady‐state error in near‐field electromagnetic ranging application. Then the time delay estimated by RSSIMCC algorithm can be exploited based on the near‐field behavior of radio signals for ranging in an indoor environment. Copyright © 2016 John Wiley & Sons, Ltd.
Developmental nicotine exposure alters cholinergic control of respiratory frequency in neonatal rats
Authors: Wollman Lila B. , Haggerty Jarl , Pilarski Jason Q. , Levine Richard B. , Fregosi Ralph F. 
Published: January 2016

ABSTRACTPrenatal nicotine exposure with continued exposure through breast milk over the first week of life (developmental nicotine exposure, DNE) alters the development of brainstem circuits that control breathing. Here, we test the hypothesis that DNE alters the respiratory motor response to endogenous and exogenous acetylcholine (ACh) in neonatal rats. We used the brainstem‐spinal cord preparation in the split‐bath configuration, and applied drugs to the brainstem compartment while measuring the burst frequency and amplitude of the fourth cervical ventral nerve roots (C4VR), which contain the axons of phrenic motoneurons. We applied ACh alone; the nicotinic acetylcholine receptor (nAChR) antagonist curare, either alone or in the presence of ACh; and the muscarinic acetylcholine receptor (mAChR) antagonist atropine, either alone or in the presence of ACh. The main findings include: (1) atropine reduced frequency similarly in controls and DNE animals, while curare caused modest slowing in controls but no consistent change in DNE animals; (2) DNE greatly attenuated the increase in C4VR frequency mediated by exogenous ACh; (3) stimulation of nAChRs with ACh in the presence of atropine increased frequency markedly in controls, but not DNE animals; (4) stimulation of mAChRs with ACh in the presence of curare caused a modest increase in frequency, with no treatment group differences. DNE blunts the response of the respiratory central pattern generator to exogenous ACh, consistent with reduced availability of functionally competent nAChRs; DNE did not alter the muscarinic control of respiratory motor output. © 2016 Wiley Periodicals, Inc. Develop Neurobiol 76: 1138–1149, 2016