bluuebunny/crossref_metadata_2025_split huggingface dataset:
Synthesis, Characterization and Identification of Mononuclear Transition Metals Complexes 1, 3-Bis-((5-methyl-1H-Imidazol-4-yl) Methyleneamino) Propan-2-ol Ligand
Authors: Seck Gorgui Awa , Guèye Mbossé Ndiaye , Haba Pokpa , Thiam Ibrahima Elhadji , Diouf Ousmane , Sall Abdou Salam , Gaye Mohamed 
Published: October 2024

The ligand 1,3-bis-((5-methyl-1H-imidazol-4-yl)methyleneamino)propan-2-ol (H3L) derived from 1,3-diaminopropan-2-ol and 5-methyl-1H-imidazole-4-carbaldehyde has been synthetized and used to prepare five complexes in which the ligand acts in tetradentate fashion. Complexes formulated as [Mn(H3L)(H2O)2].2SCN (1), [(Co(H3L)].2SCN (2), [(Ni(H3L)].2SCN (3), [(Cu(H3L)(NO3)].(NO3).2H2O (4), and [(Zn(H3L)].2SCN (5) were synthesized by mixing an equimolar amount of an methanol solution containing the appropriate nitrate salt and KSCN, in 1:2 ratio, in the case of 1, 2, 3 and 5 and an ethanol solution containing the appropriate ligand H3L. The complex 4 has been synthetized in the absence of KSCN. In all the complexes the ligand acts in its neutral form and in tetradentate fashion, its hydroxy group remaining free and non-deprotonated. The ligand is coordinated to metal ion through two azomethine nitrogen atoms and two pyrazole sp2 nitrogen atoms. The complexes are characterized by elemental analysis, conductance and room temperature magnetic moments measurements, UV–Vis and IR spectroscopic studies. The structure of the copper(II) complex 4 is confirmed by X-ray diffraction. 4 crystallizes in the monoclinic space group P21/c with unit cell dimensions a = 8.5459 (3) Å, b = 10.9177 (3) Å, c = 22.4562 (6) Å, b = 96.954 (3)°, V = 2079.79 (11) Å3, Z = 4, R1 = 0.050 and wR2 = 0.131. The CuII cation in N4O inner is situated in a distorted square pyramidal environment.
Synthesis and Characterization of Binuclear Complexes of Metals Transition of N’1,N’4-Bis(1-(Pyridin-2-yl)Ethylidene)Succinohydrazide
Authors: Seck Gorgui Awa , Guèye Mbossé Ndiaye , Tamboura Farba Bouyagui , Thiam Ibrahima Elhadji , Diouf Ousmane , Sall Abdou Salam , Gaye Mohamed 
Published: October 2024

Six news dinuclear metal transition (Mn(II) (1), Fe(II) (2), Co(II) (3), Ni(II) (4), Cu(II) (5) and Zn(II) (6)) complexes have been synthesized from a new hexadentate Schiff base N’1,N’4-bis(1-(pyridin-2-yl)ethylidene)succinohydrazide (H2L). The ligand was characterized by elemental analysis, FTIR, UV-visible, 1H NMR and 13C NMR. The synthetized compounds have been investigated by elemental analysis, FTIR and UV-visible spectroscopies, molar conductance and room temperature magnetic moments measurement. The results show that the complexes 1-6 are dinuclear neutral electrolytes in DMF. Each of the two mono deprotonated tridentate arms of the ligand are coordinated to one metal ion through one iminolate oxygen atom, one azomethine nitrogen atom and one pyridine nitrogen atom. Octahedral geometries are proposed for all the complexes 1-6 formulated as [(ML)2].nH2O. The structure of the Ni(II) (4) complex is confirmed by X-ray crystallography study.
Effects of electrojet turbulence on a magnetosphere‐ionosphere simulation of a geomagnetic storm
Authors: Wiltberger M. , Merkin V. , Zhang B. , Toffoletto F. , Oppenheim M. , Wang W. , Lyon J. G. , Liu J. , Dimant Y. , Sitnov M. I. , Stephens G. K. 
Published: April 2017

AbstractIonospheric conductance plays an important role in regulating the response of the magnetosphere‐ionosphere system to solar wind driving. Typically, models of magnetosphere‐ionosphere coupling include changes to ionospheric conductance driven by extreme ultraviolet ionization and electron precipitation. This paper shows that effects driven by the Farley‐Buneman instability can also create significant enhancements in the ionospheric conductance, with substantial impacts on geospace. We have implemented a method of including electrojet turbulence (ET) effects into the ionospheric conductance model utilized within geospace simulations. Our particular implementation is tested with simulations of the Lyon‐Fedder‐Mobarry global magnetosphere model coupled with the Rice Convection Model of the inner magnetosphere. We examine the impact of including ET‐modified conductances in a case study of the geomagnetic storm of 17 March 2013. Simulations with ET show a 13% reduction in the cross polar cap potential at the beginning of the storm and up to 20% increases in the Pedersen and Hall conductance. These simulation results show better agreement with Defense Meteorological Satellite Program observations, including capturing features of subauroral polarization streams. The field‐aligned current (FAC) patterns show little differences during the peak of storm and agree well with Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) reconstructions. Typically, the simulated FAC densities are stronger and at slightly higher latitudes than shown by AMPERE. The inner magnetospheric pressures derived from Tsyganenko‐Sitnov empirical magnetic field model show that the inclusion of the ET effects increases the peak pressure and brings the results into better agreement with the empirical model.
Possible Ceres bow shock surfaces based on fluid models
Authors: Jia Y.‐D. , Villarreal M. N. , Russell C. T. 
Published: April 2017

AbstractThe hot electron beams that Dawn detected at Ceres can be explained by fast‐Fermi acceleration at a temporary bow shock. A shock forms when the solar wind encounters a temporary atmosphere, similar to a cometary coma. We use a magnetohydrodynamic model to quantitatively reproduce the 3‐D shock surface at Ceres and deduce the atmosphere characteristics that are required to create such a shock. Our most simple model requires about 1.8 kg/s, or 6 × 1025/s water vapor production rate to form such a shock. Such an estimate relies on characteristics of the solar wind‐Ceres interaction. We present several case studies to show how these conditions affect our estimate. In addition, we contrast these cases with the smaller and narrower shock caused by a subsurface induction. Our multifluid model reveals the asymmetry introduced by the large gyroradius of the heavy pickup ions and further constrains the IMF direction during the events.
Revised constraints on absolute age limits for Mercury's Kuiperian and Mansurian stratigraphic systems
Authors: Banks Maria E. , Xiao Zhiyong , Braden Sarah E. , Barlow Nadine G. , Chapman Clark R. , Fassett Caleb I. , Marchi Simone S. 
Published: April 2017

AbstractFollowing an approach similar to that used for the Moon, Mercury's surface units were subdivided into five time‐stratigraphic systems based on geologic mapping using Mariner 10 images. The absolute time scale originally suggested for the time periods associated with these systems was based on the assumption that the lunar impact flux history applied to Mercury. However, we find that the duration and onset of corresponding periods in the stratigraphic sequences on Mercury and the Moon are not the same. Using high‐resolution and multiband image data obtained by the MErcury Surface, Space ENviroment, GEochemistry, and Ranging (MESSENGER) spacecraft, we identify and catalog fresh impact craters interpreted to have formed during Mercury's two most recent periods, the Mansurian and Kuiperian. We use the densities of the inferred Kuiperian‐ and Mansurian‐aged crater populations to estimate new limits for the age boundaries of these time intervals. Results suggest that both the Mansurian and Kuiperian periods began more recently and extended for significantly shorter durations of time than previously suggested. The Kuiperian is estimated to have initiated as recently as ~280 ± 60 Ma and the Mansurian as recently as ~1.7 ± 0.2 Ga.
Biophysical drivers of seasonal variability in Sphagnum gross primary production in a northern temperate bog
Authors: Walker Anthony P. , Carter Kelsey R. , Gu Lianhong , Hanson Paul J. , Malhotra Avni , Norby Richard J. , Sebestyen Stephen D. , Wullschleger Stan D. , Weston David J. 
Published: April 2017

AbstractSphagnum mosses are the keystone species of peatland ecosystems. With rapid rates of climate change occurring in high latitudes, vast reservoirs of carbon accumulated over millennia in peatland ecosystems are potentially vulnerable to rising temperature and changing precipitation. We investigate the seasonal drivers of Sphagnum gross primary production (GPP)—the entry point of carbon into wetland ecosystems. Continuous flux measurements and flux partitioning show a seasonal cycle of Sphagnum GPP that peaked in the late summer, well after the peak in photosynthetically active radiation. Wavelet analysis showed that water table height was the key driver of weekly variation in Sphagnum GPP in the early summer and that temperature was the primary driver of GPP in the late summer and autumn. Flux partitioning and a process‐based model of Sphagnum photosynthesis demonstrated the likelihood of seasonally dynamic maximum rates of photosynthesis and a logistic relationship between the water table and photosynthesizing tissue area when the water table was at the Sphagnum surface. The model also suggested that variability in internal resistance to CO2 transport, a function of Sphagnum water content, had minimal effect on GPP. To accurately model Sphagnum GPP, we recommend the following: (1) understanding seasonal photosynthetic trait variation and its triggers in Sphagnum; (2) characterizing the interaction of Sphagnum photosynthesizing tissue area with water table height; (3) modeling Sphagnum as a “soil” layer for consistent simulation of water dynamics; and (4) measurement of Sphagnum “canopy” properties: extinction coefficient (k), clumping (Ω), and maximum stem area index (SAI).
Seafloor age dependence of Rayleigh wave phase velocities in the Indian Ocean
Authors: Godfrey Karen E. , Dalton Colleen A. , Ritsema Jeroen 
Published: April 2017

AbstractVariations in the phase velocity of fundamental‐mode Rayleigh waves across the Indian Ocean are determined using two inversion approaches. First, variations in phase velocity as a function of seafloor age are estimated using a pure‐path age‐dependent inversion method. Second, a two‐dimensional parameterization is used to solve for phase velocity within 1.25° × 1.25° grid cells. Rayleigh wave travel time delays have been measured between periods of 38 and 200 s. The number of measurements in the study area ranges between 4139 paths at a period of 200 s and 22,272 paths at a period of 40 s. At periods < 100 s, the phase velocity variations are strongly controlled by seafloor age and shown to be consistent with temperature variations predicted by the half‐space‐cooling model for a mantle potential temperature of 1400°C. The inferred thermal structure beneath the Indian Ocean is most similar to the structure of the Pacific upper mantle, where phase velocities can also be explained by a half‐space‐cooling model. The thermal structure is not consistent with that of the Atlantic upper mantle, which is best fit by a plate‐cooling model and requires a thin plate. Removing age‐dependent phase velocity from the 2‐D maps of the Indian Ocean highlights anomalously high velocities at the Rodriguez Triple Junction and the Australian‐Antarctic Discordance and anomalously low velocities immediately to the west of the Central Indian Ridge.
Subsynoptic‐scale features associated with extreme surface gusts in UK extratropical cyclone events
Authors: Earl N. , Dorling S. , Starks M. , Finch R. 
Published: April 2017

AbstractNumerous studies have addressed the mesoscale features within extratropical cyclones (ETCs) that are responsible for the most destructive winds, though few have utilized surface observation data, and most are based on case studies. By using a 39‐station UK surface observation network, coupled with in‐depth analysis of the causes of extreme gusts during the period 2008–2014, we show that larger‐scale features (warm and cold conveyer belts) are most commonly associated with the top 1% of UK gusts but smaller‐scale features generate the most extreme winds. The cold conveyor belt is far more destructive when joining the momentum of the ETC, rather than earlier in its trajectory, ahead of the approaching warm front. Sting jets and convective lines account for two thirds of severe surface gusts in the UK.
Influence of parameterized small‐scale gravity waves on the migrating diurnal tide in Earth's thermosphere
Authors: Yiğit Erdal , Medvedev Alexander S. 
Published: April 2017

AbstractEffects of subgrid‐scale gravity waves (GWs) on the diurnal migrating tides are investigated from the mesosphere to the upper thermosphere for September equinox conditions, using a general circulation model coupled with the extended spectral nonlinear GW parameterization of Yiğit et al. (). Simulations with GW effects cut off above the turbopause and included in the entire thermosphere have been conducted. GWs appreciably impact the mean circulation and cool the thermosphere down by up to 12–18%. GWs significantly affect the winds modulated by the diurnal migrating tide, in particular, in the low‐latitude mesosphere and lower thermosphere and in the high‐latitude thermosphere. These effects depend on the mutual correlation of the diurnal phases of the GW forcing and tides: GWs can either enhance or reduce the tidal amplitude. In the low‐latitude MLT, the correlation between the direction of the deposited GW momentum and the tidal phase is positive due to propagation of a broad spectrum of GW harmonics through the alternating winds. In the Northern Hemisphere high‐latitude thermosphere, GWs act against the tide due to an anticorrelation of tidal wind and GW momentum, while in the Southern high‐latitudes they weakly enhance the tidal amplitude via a combination of a partial correlation of phases and GW‐induced changes of the circulation. The variable nature of GW effects on the thermal tide can be captured in GCMs provided that a GW parameterization (1) considers a broad spectrum of harmonics, (2) properly describes their propagation, and (3) correctly accounts for the physics of wave breaking/saturation.
T‐matrix and radiative transfer hybrid models for densely packed particulates at mid‐infrared wavelengths
Authors: Ito G. , Arnold J. A. , Glotch T. D. 
Published: April 2017

AbstractMid‐infrared spectroscopy is a useful tool for remotely sensing the composition of Earth and other planets. Quantitative mineralogical investigations are possible using remotely sensed data; however, the difficulty in modeling complex interactions of light with particles that are on the order of the wavelength limits the usefulness of the remote sensing data. As part of an effort to develop a more effective treatment of light scattering in planetary regolith, we explore the ability of T‐matrix and radiative transfer (RT) hybrid models to produce emissivity spectra that are consistent with laboratory measurements. Parameters obtained from T‐matrix calculations are used in three different RT models to construct emissivity spectra of enstatite particles of different sizes. Compared to the widely used Mie/RT hybrid models, the T‐matrix/RT hybrid models produce more consistent emissivity spectra for the finest particle size fraction (3.3 μm). Overall, T‐matrix hybrid models produce improved emissivity spectra, but larger particle sizes are still difficult to model. The improvement observed in T‐matrix/RT hybrid models is a result of the inclusion of multiple scattering in closely packed media, and it demonstrates the importance of the implementation of physically realistic factors in developing a more effective light scattering model for planetary regolith. Further development and implementation of this and similar hybrid models will result in an improvement in quantitative assessments of planetary particulate surfaces from mid‐infrared spectra.
Observers' Language Proficiencies and the Detection of Non‐native Speakers' Deception
Authors: Leach Amy‐May , Snellings Renée L. , Gazaille Mariane 
Published: April 2017

SummaryWe examined whether observers' language proficiencies affected their abilities to detect native and non‐native speakers' deception. Native and non‐native English speakers were videotaped as they either lied or told the truth about having cheated on a test. A total of 284 laypersons—who were either native or non‐native English speakers themselves—viewed these videos and indicated whether they believed that the speakers were being truthful or deceptive. Observers were more accurate when judging native speakers than when judging non‐native speakers, suggesting that perceptual fluency aided deception detection. Although there was no effect of observers' language proficiencies on discrimination, their belief that interviewees were telling the truth increased with proficiency. On the whole, these findings suggest that non‐native speakers may be at greater risk of being incorrectly classified in forensic contexts.Copyright © 2017 John Wiley & Sons, Ltd.
Efficient Generation of C–S Bonds via a By‐Product‐Promoted Selective Coupling of Alcohols, Organic Halides, and Thiourea
Authors: Ma Xiantao , Yu Lei , Su Chenliang , Yang Yaqi , Li Huan , Xu Qing 
Published: April 2017

AbstractA metal‐ and base‐free three‐component coupling of alcohols, heteroaryl halides, and thiourea has been developed for direct and selective synthesis of heteroaryl thioethers. This method can be easily scaled up to the gram scale and extended to dialkyl thioethers, heteroaryl selenides, benzothiazoles, and some antimycobacterially‐active thioethers. Mechanistic studies revealed that a by‐product‐promoted in situ C–O activation of alcohols to more reactive alkyl halides and slow release of the thiol and alkyl halide intermediates are the key to the high selectivity and success of the reaction.magnified image
Degradation of the BAF Complex Factor BRD9 by Heterobifunctional Ligands
Authors: Remillard David , Buckley Dennis L. , Paulk Joshiawa , Brien Gerard L. , Sonnett Matthew , Seo Hyuk‐Soo , Dastjerdi Shiva , Wühr Martin , Dhe‐Paganon Sirano , Armstrong Scott A. , Bradner James E. 
Published: April 2017

AbstractThe bromodomain‐containing protein BRD9, a subunit of the human BAF (SWI/SNF) nucleosome remodeling complex, has emerged as an attractive therapeutic target in cancer. Despite the development of chemical probes targeting the BRD9 bromodomain, there is a limited understanding of BRD9 function beyond acetyl‐lysine recognition. We have therefore created the first BRD9‐directed chemical degraders, through iterative design and testing of heterobifunctional ligands that bridge the BRD9 bromodomain and the cereblon E3 ubiquitin ligase complex. Degraders of BRD9 exhibit markedly enhanced potency compared to parental ligands (10‐ to 100‐fold). Parallel study of degraders with divergent BRD9‐binding chemotypes in models of acute myeloid leukemia resolves bromodomain polypharmacology in this emerging drug class. Together, these findings reveal the tractability of non‐BET bromodomain containing proteins to chemical degradation, and highlight lead compound dBRD9 as a tool for the study of BRD9.
A Facile and Versatile Synthesis of Energetic Furazan‐Functionalized 5‐Nitroimino‐1,2,4‐Triazoles
Authors: Xu Zhen , Cheng Guangbin , Yang Hongwei , Ju Xuehai , Yin Ping , Zhang Jiaheng , Shreeve Jean'ne M. 
Published: April 2017

AbstractAn analogue‐oriented synthetic route for the formulation of furazan‐functionalized 5‐nitroimino‐1,2,4‐triazoles has been explored. The process was found to be straightforward, high yielding, and highly efficient, and scalable. Nine compounds were synthesized and the physicochemical and energetic properties, including density, thermal stability, and sensitivity, were investigated, as well as the energetic performance (e.g., detonation velocities and detonation pressures) as evaluated by using EXPLO5 code. Among the new materials, compounds 4–6 and 11 possess high densities, acceptable sensitivities, and good detonation performances, and thereby demonstrate the potential applications as new secondary explosives.
Priced just for me: The role of interpersonal attachment style on consumer responses to customized pricing
Authors: David Meredith E. , Bearden William O. , Haws Kelly L. 
Published: April 2017

AbstractCustomized pricing is an increasing phenomenon in the marketplace, but little is known about factors influencing consumer responses to customized pricing. The present paper seeks to gain an understanding of how, why, and when this emerging pricing mechanism may offer benefits. Specifically, this research focuses on how consumers respond to customized pricing tactics and, more specifically, on how interpersonal attachment orientations impact consumers' responses to prices offered in the presence of a customized pricing program. The results of 3 studies suggest that customized pricing programs likely create an expectation for a discounted price among securely attached individuals, such that these consumers are dissatisfied paying the shelf price in the presence of a customized pricing program. Overall, the results provide evidence that, although customized pricing programs are often used to enhance consumer evaluations, they may not always be effective. This paper advances prior research by integrating important considerations for both pricing and customization strategies based on individual and situational differences in attachment orientations.
Identification of circulating miRNA involved in meat yield of Korean cattle
Authors: Lee Surim , Park Seung‐Ju , Cheong Jae‐kyoung , Ko Jong‐Youl , Bong Jinjong , Baik Myunggi 
Published: April 2017

AbstractCattle plays an important role in providing essential nutrients through meat production. Thus, we focused on epigenetic factors associated with meat yield. To investigate circulating miRNAs that are involved with meat yield and connect biofluids and longissimus dorsi (LD) muscle in Korean cattle, we performed analyses of the carcass characteristics, miRNA array, qPCR, and bioinformatics. Carcass characteristics relative to the yield grade (YG) showed that the yield index and rib eye area were the highest, whereas the backfat thickness was the lowest for YG A (equal to high YG) cattle among the three YGs. miRNA array sorted the circulating miRNAs that connect biofluids and LD muscle. miRNA qPCR showed that miR‐15a (r = 0.84), miR‐26b (r = 0.91), and miR‐29c (r = 0.92) had positive relationships with biofluids and LD muscle. In YG A cattle, miR‐26b was considered to be a circulating miRNA connecting biofluids and LD muscle because the target genes of miR‐26b were more involved with myogenesis. Then, miR‐26b‐targeted genes, DIAPH3 and YOD1, were downregulated in YG A cattle. Our results suggest that miR‐15a, miR‐26b, and miR‐29c are upregulated in biofluids and LD muscle, whereas DIAPH3 and YOD1 are downregulated in the LD muscle of finishing cattle steers.
De novo balanced reciprocal translocation t(2;3)(q31;q27) in a fetus conceived using PGD in a t(2;14)(q35;q32.1) balanced reciprocal translocation carrier mother
Authors: Kim Ji Won , Shim Sung Han , Lee Woo Sik 
Published: April 2017

Key Clinical MessageWe reported a case of a t(2;14) balanced reciprocal translocation carrier mother that conceived by IVF accompanied by PGD/PGS using array‐CGH; however, de novo t(2;3) was detected in the prenatal diagnosis. A healthy baby was delivered, and careful observation is needed for PGD/PGS cases.
Achieving a satisfactory clinical and biochemical response in antiphospholipid syndrome and severe thrombocytopenia with rituximab: two case reports
Authors: Gamoudi Donia , Cutajar Melanie , Gamoudi Nadia , Camilleri David James , Gatt Alex 
Published: April 2017

Key Clinical MessageIn AP syndrome (APS) with severe thrombocytopenia, rituximab represents a unique drug which can balance the effect of bleeding and thrombosis. By reducing the production of autoantibodies, rituximab can simultaneously raise the platelets and reduce the chance of thrombosis by suppressing APL antibodies. Rituximab can supersede splenectomy as second‐line therapy in similar patients.