bluuebunny/crossref_metadata_2025_split huggingface dataset:
Complex characterization of oat (Avena sativaL.) lines obtained by wide crossing with maize (Zea maysL.)
Authors: Skrzypek Edyta , Warzecha Tomasz , Noga Angelika , Warchoł Marzena , Czyczyło-Mysza Ilona , Dziurka Kinga , Marcińska Izabela , Kapłoniak Kamila , Sutkowska Agnieszka , Nita Zygmunt , Werwińska Krystyna , Idziak-Helmcke Dominika , Rojek Magdalena , Hosiawa-Barańska Marta 
Published: June 2018

BackgroundThe oat × maize addition (OMA) lines are used for mapping of the maize genome, the studies of centromere-specific histone (CENH3), gene expression, meiotic chromosome behavior and also for introducing maize C4 photosynthetic system to oat. The aim of our study was the identification and molecular-cytogenetic characterization of oat × maize hybrids.MethodsOat DH lines and oat × maize hybrids were obtained using the wide crossing ofAvena sativaL. withZea maysL. The plants identified as having aGrande-1retrotransposon fragment, which produced seeds, were used for genomicin situhybridization (GISH).ResultsA total of 138 oat lines obtained by crossing of 2,314 oat plants from 80 genotypes with maize cv. Waza were tested for the presence of maize chromosomes. The presence of maize chromatin was indicated in 66 lines by amplification of the PCR product (500 bp) generated using primers specific for the maize retrotransposonGrande-1. Genomicin situhybridization (GISH) detected whole maize chromosomes in eight lines (40%). All of the analyzed plants possessed full complement of oat chromosomes. The number of maize chromosomes differed between the OMA lines. Four OMA lines possessed two maize chromosomes similar in size, three OMA—one maize chromosome, and one OMA—four maize chromosomes. In most of the lines, the detected chromosomes were labeled uniformly. The presence of six 45S rDNA loci was detected in oat chromosomes, but none of the added maize chromosomes in any of the lines carried 45S rDNA locus. Twenty of the analyzed lines did not possess whole maize chromosomes, but the introgression of maize chromatin in the oat chromosomes. Five of 66 hybrids were shorter in height, grassy type without panicles. Twenty-seven OMA lines were fertile and produced seeds ranging in number from 1–102 (in total 613). Sixty-three fertile DH lines, out of 72 which did not have an addition of maize chromosomes or chromatin, produced seeds in the range of 1–343 (in total 3,758). Obtained DH and OMA lines were fertile and produced seeds.DiscussionIn wide hybridization of oat with maize, the complete or incomplete chromosomes elimination of maize occur. Hybrids of oat and maize had a complete set of oat chromosomes without maize chromosomes, and a complete set of oat chromosomes with one to four retained maize chromosomes.
Hydrocarbons Analysis: Introduction
Authors: Alves Julio Cesar Laurentino 
Published: June 2018

Abstract
In this article a brief description of the contributions to the topic Hydrocarbon Analysis is given, which includes discussions on the analysis of petroleum and its derivatives such as gasoline, diesel oil and lubricating oils. The analysis of shale oil is also addressed in this topic, as well as the analysis of biofuels, which may or may not be hydrocarbons, but were included in this topic.
Principle of Mass Cytometry
Authors: Korin Ben , Grau Amir 
Published: June 2018

AbstractMass cytometry is an evolving technology combining flow cytometry methodology with inductively coupled plasma mass spectrometry (ICP‐MS). It overcomes flow cytometry's inherent limitation, by conjugated metal isotopes as reporter tags to antibodies instead of fluorophores. Its great advantage lies in its capacity to analyze more than 45 parameters simultaneously, at a single‐cell level, with very low signal spillover between adjacent masses. Mass cytometry high parameterization offers unparalleled characterization of single cells within heterogeneous populations, in a system‐wide view manner. Accordingly, it has been applied for a deeper understanding of specific cell subsets and network signaling. These new phenotypic characterization capabilities have provided a significant advancement in our ability to resolve biological questions. The high dimensionality of the data necessitates the development of new analytical tools, using data reduction and clustering of cells, in order to visualize and interpret the data. In this article, we will discuss the main principles of mass cytometry, its applications, main advancements, and the tools available for analysis.
Modified multiplicative quaternion cubature Kalman filter for attitude estimation
Authors: Qiu Zhenbing , Qian Huaming 
Published: June 2018

SummaryIn this paper, a modified multiplicative quaternion cubature Kalman filter (CKF) for attitude estimation is proposed. For high‐dimensional state estimation, the CKF that uses third‐degree spherical‐radial cubature rule can provide a more accurate estimation than the unscented Kalman filter. However, for the attitude estimation in the case of larger initial conditional errors, the results may be reversed. To take full advantage of the CKF, the Lagrange cost function method is introduced to solve the quaternion weighted mean, then, the mean is used as the reference quaternion for the measurement update in the CKF framework. The choice of the reference quaternions and the quaternion update method is different from the existing literature to avoid the algorithm from failing. In addition, the unconstrained three‐component vectors represent the attitude error quaternion in the filtering algorithm, whereas the quaternion is used to perform attitude propagation. Simulation results demonstrate the better performance of the proposed modifying filter algorithm in comparison with the multiplicative extended Kalman filter, the unscented Kalman filter, and the CKF under larger initial condition errors.
Superhydrophobic, Surfactant‐doped, Conducting Polymers for Electrochemically Reversible Adsorption of Organic Contaminants
Authors: Ren Yinying , Lin Zhou , Mao Xianwen , Tian Wenda , Van Voorhis Troy , Hatton T. Alan 
Published: June 2018

AbstractPolymeric adsorbents show great potential for the replacement of activated carbon for removing a wide range of toxic organic pollutants from wastewater streams since they do not suffer from costly regeneration needs and high attrition rates. Herein, an electrochemically regenerable polymeric adsorbent based on an intrinsically conducting polymer (CP), polypyrrole (PPy), doped with anionic surfactant dioctylsulfosuccinate (AOT), denoted PPy(AOT), for mitigating organic pollutants in wastewater is reported. A facile electropolymerization protocol to synthesize highly porous PPy(AOT) is developed, with an adsorption capacity of greater than 570 mg pollutant/g polymer in its superhydrophobic oxidized state. It is demonstrated that the hydrophobicity of PPy(AOT) and hence its affinity for organics can be modulated electrochemically through the re‐orientation of AOT dopants, which can be exploited to regenerate the adsorbent and use it repeatedly for multiple adsorption/desorption cycles. It also explores the interactions between the adsorbed organic molecules and the surfactant‐doped CP adsorbent using a combined density functional theory and molecular dynamics approach to elucidate the mechanism of electrochemical modulations of hydrophobicity and affinity of the material. The physicochemical insights are significant for developing broader applications of such material in drug delivery, sensing, self‐cleaning surfaces, microfluidics, and artificial muscles.
Exceptional Catalytic Nature of Quantum Dots for Photocatalytic Hydrogen Evolution without External Cocatalysts
Authors: Gao Yu‐Ji , Li Xu‐Bing , Wu Hao‐Lin , Meng Shu‐Lin , Fan Xiang‐Bing , Huang Mao‐Yong , Guo Qing , Tung Chen‐Ho , Wu Li‐Zhu 
Published: June 2018

AbstractThe catalytic nature of semiconducting quantum dots (QDs) for photocatalytic hydrogen (H2) evolution can be thoroughly aroused, not because of coupling with external cocatalysts, but through partially covering controlled amount of ZnS shell on the surface. Specifically, CdSe QDs, with an optimal coverage of ZnS (≈46%), can produce H2 gas with a constant rate of ≈306.3 ± 21.1 µmol mg−1 h−1 during 40 h, thereby giving a turnover number of ≈(4.4 ± 0.3) × 105, which is ≈110‐fold to that of unmodified CdSe QDs under identical conditions. The performance of H2 evolution is comparable to or even better than the commonly used external cocatalysts, e.g., metal complexes, noble metals assisted photosystems. Mechanistic insights indicate that the dramatically enhanced activity and stability of bare QDs for photocatalytic H2 production are derived from (i) inhibiting exciton annihilation at trap states, (ii) preventing the photo‐oxidation of core frameworks, and (iii) retaining tunneling efficiencies of photogenerated electrons and holes to reactive sites with partial ZnS coverage.
High Tap Density Co and Ni Containing P2‐Na0.66MnO2 Buckyballs: A Promising High Voltage Cathode for Stable Sodium‐Ion Batteries
Authors: Kaliyappan Karthikeyan , Xaio Wei , Sham Tsun‐Kong , Sun Xueliang 
Published: June 2018

AbstractConstructing high voltage (>4.5 V) cathode materials for sodium‐ion batteries has emerged in recent years to replace lithium batteries for large scale energy storage applications. Herein, an electrochemically stable Na0.66(Ni0.13Mn0.54Co0.13)O2 (Na‐NMC) buckyballs with an uniform size of 5 µm and a high tap density of 2.34 g cm−3, which exhibit excellent cyclability even at the high current with a cut‐off voltage of 4.7 V, is demonstrated. The Na‐NMC buckyballs are prepared from (Ni0.13Mn0.54Co0.13)CO3 (NMC) precursor synthesized using a facile hydrothermal method. The Na‐NMC delivers a reversible capacity of around 120 mAh g−1 between 4.7 and 2 V at 1 C rate along with an excellent cyclic stability (90%) until 150 cycles, which is one of the best outcomes among the reported P2‐type cathodes tested at the high operating voltage range. Furthermore, Na‐NMC‐180 buckyballs with a high tap density is offering an enhanced volumetric energy density, a superior rate performance and an outstanding cyclic stability. The X‐ray adsorption fine structure analysis is used to study the local electronic structure changes around the Co, Mn, and Ni after cycling process at 1 C rate. The findings open opportunities for tailoring high‐performance and high‐energy cathode materials for sodium‐ion batteries.
Ionic Additive Engineering Toward High‐Efficiency Perovskite Solar Cells with Reduced Grain Boundaries and Trap Density
Authors: Cai Feilong , Yan Yu , Yao Jiaxu , Wang Pang , Wang Hui , Gurney Robert S. , Liu Dan , Wang Tao 
Published: June 2018

AbstractOrganic–inorganic hybrid perovskite solar cells have emerged as one of the promising photovoltaic candidates to generate renewable energy. However, the large amounts of grain boundaries and trap states that exist in the bulk or interfacial regions of perovskite films limit further enhancement of device efficiency. Herein, an additive engineering strategy is introduced employing trimethylammonium chloride in the methylammonium iodide precursor solution to prepare methylammonium lead iodide perovskite films with reduced grain boundaries and trap densities. This leads to an increased charge carrier diffusion coefficient and diffusion length, as evaluated by impedance and voltage decay measurements, intensity‐modulated photovoltage, and photocurrent spectroscopies. The proportion of nonradiative recombination processes is significantly reduced, consequently increasing device efficiency from 19.1% to 20.9% in these perovskite solar cells.
Chirality on Hierarchical Self‐Assembly of Au@AuAg Yolk–Shell Nanorods into Core–Satellite Superstructures for Biosensing in Human Cells
Authors: Hao Changlong , Xu Liguang , Sun Maozhong , Ma Wei , Kuang Hua , Xu Chuanlai 
Published: June 2018

AbstractHere, Au@AgAu yolk–shell nanorods (YSNRs) with tunable plasmonic circular dichroism (PCD) responses are synthesized, for the first time, using chiral d‐ or l‐penicillamine. The concentration of chiral molecules and the nanogap size play key roles in the PCD signal of the YSNRs. Importantly, the PCD response could be regulated by changing the aspect ratio of gold nanorods, and the largest anisotropy factor (g‐factor) is 0.009. Remarkably, the YSNRs are used as new chiroptical building blocks together with Au nanoparticles (NPs) to build YSNR@NP core–satellite (CS) assemblies, which display much stronger PCD intensity and an increased g‐factor of 0.021. The theoretical calculation data demonstrate that the significant PCD activity of nanoassemblies is originated from chiral structures and the intrinsic chirality of the building blocks. Noticeably, the developed CS superstructures with photothermal effects are utilized to quantitatively detect zinc ion in living cell lines. This study reports an emerging class of chiral inorganic nanostructures with important future applications, including enantioselective separation, asymmetric catalysis, and biomedical sensing.
Optical and Electrical Enhancement of Hydrogen Evolution by MoS2@MoO3 Core–Shell Nanowires with Designed Tunable Plasmon Resonance
Authors: Guo Shaohui , Li Xuanhua , Ren Xingang , Yang Lin , Zhu Jinmeng , Wei Bingqing 
Published: June 2018

AbstractThe design of transition‐metal chalcogenides (TMCs) photocatalysts for water splitting is highly important, in which both light absorption and interfacial engineering play vital roles in photoexcited electron generation, electron transport, and ultimately speeding up water splitting. To this end, plasmonic metal nanomaterials with surface plasmon resonances are promising candidates. However, it is very difficult to enhance the light absorption and manage the interfacial engineering simultaneously, thus, resulting in suboptimal photocatalytic performance. Here, a doped semiconductor plasmon is proposed to optically and electrically enhance TMCs hydrogen evolution. With the tunability of plasmon resonance in a doped MoO3 semiconductor via hydrogen reduction, the broadband absorption and good interfacial engineering are simultaneously demonstrated in flexible MoS2@MoO3 core–shell nanowire photocatalysts. Better energy‐band alignment with MoS2 can also be realized, thereby achieving improved photoinduced electron generation. More importantly, the defects at the interface between MoO3 and MoS2 are effectively reduced because of precise tunability of plasmon resonance, which enhances electron transport. As a proof of concept, this optimized hybrid nanostructure exhibits outstanding H2 evolution characteristics (841.4 μmol h−1 g−1), excellent stability, and good flexibility. The value is also one of the highest hydrogen evolution activity rates to date among the two dimensional‐layered visible‐light photocatalysts.
Submillimeter 2D Bi2Se3 Flakes toward High‐Performance Infrared Photodetection at Optical Communication Wavelength
Authors: Wang Fakun , Li Leigang , Huang Wenjuan , Li Liang , Jin Bao , Li Huiqiao , Zhai Tianyou 
Published: June 2018

AbstractInfrared detection at optical communication wavelength is of great significance because of their diverse commercial and military communication applications. The layered Bi2Se3 with a narrow band gap of 0.3 eV is regarded as a promising candidate toward high‐performance terahertz to infrared applications. However, the controllable synthesis of large‐size ultrathin Bi2Se3 flakes remains a challenge owing to complex nucleation process and infrared telecommunication photodetectors based on Bi2Se3 flakes are rarely reported. Here, large size (submillimeter: 0.2–0.4 mm in lateral dimensions) and ultrathin (thickness: 3 nm to few nanometers) 2D Bi2Se3 flakes with high crystal quality are obtained by suppressing the nucleation density. More importantly, back‐gate field‐effect transistor based on Bi2Se3 flake exhibits an ultrahigh on/off current ratio of 106 and competitive mobility of 39.4 cm2 V−1 s−1. Moreover, excellent on/off ratio of 972.5, responsivity of 23.8 A W−1, and external quantum efficiency of 2035% are obtained from Bi2Se3‐based photodetector at 1456 nm in the E‐band of the telecommunication range. With controlled morphology and excellent photoresponse performance, the Bi2Se3 photodetector shows great potential in the optoelectronic field including communications, military, and remote sensing.
The Influence of Molecular Packing on the Emissive Behavior of Pyrene Derivatives: Mechanoluminescence and Mechanochromism
Authors: Gong Yan‐Bin , Zhang Pan , Gu Ya‐rong , Wang Jia‐Qiang , Han Meng‐Meng , Chen Cheng , Zhan Xue‐Jun , Xie Zong‐Liang , Zou Bo , Peng Qian , Chi Zhen‐Guo , Li Zhen 
Published: June 2018

AbstractAlthough some bright, organic mechanoluminescence (ML) luminogens with aggregation‐induced emission properties and twisted molecular structures are recently reported, those with planar structures and bright ML and their related effective design strategies are not yet explored, partially due to aggregation‐caused quenching in luminogens with planar structures. Herein, using the unique solid‐state packing style of pyrene, bright dual monomer‐excimer‐ML and excimer‐ML from two pyrene derivatives (Py‐Bpin and Py‐Br) with a simple, planar molecular structure are reported for the first time, and two analogs of pyrene and Py‐H are used for comparison. These four luminogens display similar optical properties in dilute solution but different luminescent properties in the solid state, mainly due to their different molecular packing. Interestingly, pyrene is mechanochromism (MC)‐ and ML‐inactive, while Py‐H is MC‐active, Py‐Bpin is MC‐ and ML‐active, and Py‐Br is ML‐active. The relationship between molecular packing and ML/MC properties is confirmed by analyzing single‐crystal structures and related experimental results, providing important information to further understand the mysterious ML process and opening a new way to design efficient luminogens with both MC and ML.
Band Structure Engineering by Alloying for Photonics
Authors: Gong Chen , Kaplan Alan , Benson Zackery A. , Baker David R. , McClure Joshua P. , Rocha Alexandre R. , Leite Marina S. 
Published: June 2018

AbstractSurface plasmon polaritons (SPPs) enable the deep subwavelength confinement of an electromagnetic field, which can be used in optical devices ranging from sensors to nanoscale lasers. However, the limited number of metals that satisfy the required boundary conditions for SPP propagation in a metal/dielectric interface severely limits its occurrence in the visible range of the electromagnetic spectrum. We introduce the strategy of engineering the band structure of metallic materials by alloying. We experimentally and theoretically establish the control of the dispersion relation in Ag–Au alloys by varying the film chemical composition. Through X‐ray photoelectron spectroscopy (XPS) measurements and partial density‐of‐states calculations we deconvolute the d band contribution of the density‐of‐states from the valence band spectrum, showing that the shift in energy of the d band follows the surface plasmon resonance change of the alloy. Our density functional theory calculations of the alloys band structure predict the same variation of the threshold of the interband transition, which is in very good agreement with our optical and XPS experiments. By elucidating the correlation between the optical behavior and band structure of alloys, we anticipate the fine control of the optical properties of metallic materials beyond pure metals.
From Fundamental toward Applied SERS: Shared Principles and Divergent Approaches
Authors: Balčytis Armandas , Nishijima Yoshiaki , Krishnamoorthy Sivashankar , Kuchmizhak Aleksandr , Stoddart Paul R. , Petruškevičius Raimondas , Juodkazis Saulius 
Published: June 2018

AbstractOver more than 40 years since its discovery, surface‐enhanced Raman scattering/spectroscopy (SERS) has attracted substantial attention as a tool for fundamental research in surface science and for potential analytical sensing applications. This review aims to concisely summarize the essential principles of both the physical and chemical processes underlying Raman signal enhancement, as well as elements of the broader field of plasmonics that are most relevant to SERS. In order to make sense of the overwhelming variety of SERS platforms that are reported, the fabrication, properties, and operational principles of enhancing substrates are given particular attention here in the context of specific application requirements. While the high spatial precision of lithographic techniques has helped to improve the understanding of plasmonic platforms, their prohibitive cost has encouraged the exploration of more facile fabrication methods for more widespread adoption of SERS. Selected examples are introduced to illustrate common themes that recur in fundamental studies, analytical applications, and efforts to produce stable, affordable, and robust SERS sensing platforms.
Integrated Silicon Photonic Crystals Toward Terahertz Communications
Authors: Withayachumnankul Withawat , Fujita Masayuki , Nagatsuma Tadao 
Published: June 2018

AbstractThe terahertz frequency range locates between 0.1 and 10 THz. This range accommodates atmospheric windows with staggering absolute bandwidth. It holds a potential for point‐to‐point wireless communications with an aggregate capacity reaching terabit per second in a range up to a kilometer. This unique capability is envisaged for backhauls between base stations and for local area networks. To this end, efficiency and compactness of the transceivers are crucial for successful large‐scale adoption. However, state‐of‐the‐art terahertz front ends are based on radio‐frequency or photomixing technologies that are inefficient, bulky, or complicated. In principle, as a neighbor of the microwave and optics domains, the terahertz band can leverage technologies from both sides to overcome those challenges. Recently, low‐loss integrated circuits based on photonic crystal waveguides are developed for routing terahertz waves. Here, a progress report on core components, including waveguides and diplexers, is presented. Additionally, the interfacing of the platform with electronic sources and detectors on one end, and with antennas for free‐space coupling on the other end, is discussed. Currently, the platform can support terahertz communications at a data rate over 10 Gbit s−1. Challenges and opportunities are discussed in the light of future development in this area.
Flexible Photonic Topological Insulator
Authors: Gao Zhen , Gao Fei , Zhang Youming , Luo Yu , Zhang Baile 
Published: June 2018

AbstractA mechanically flexible photonic topological insulator that supports robust topological photonic states on a curved surface is experimentally demonstrated. Spatial topologies achieved by folding the flexible photonic topological insulator serve as a new freedom to manipulate the propagation of topological photonic states. This work bridges the gap between the emerging field of topological photonics and the technologically promising field of flexible photonics.
Commodity price volatility and U.S. monetary policy: Commodity price overshooting revisited
Authors: Siami‐Namini Sima , Hudson Darren , Trindade Adao Alexandre , Lyford Conrad 
Published: June 2018

AbstractCommodity price volatility has created concerns for central bank policy‐makers. Recent commodity prices peaked in the consequences of the financial crisis of 2007, and they have remained relatively volatile since. As they are often seen as being connected in a cause and effect relationship with inflation and real output, the driving forces behind commodity price volatility are necessary for the conduct of monetary policy. Using an autoregressive moving average with an exponential generalized autoregressive conditional heteroscedastic (ARMA‐EGARCH) process, we extract the conditional variance series to find volatility spillover between monetary policy and commodity price index. The findings show that the volatility of agricultural commodity price index and other commodities price indices overshoot the long‐run equilibrium price in response to an impulse in monetary policy.