bluuebunny/crossref_metadata_2025 huggingface dataset:
RNA-seq based transcriptomic analysis uncovers α-linolenic acid and jasmonic acid biosynthesis pathways respond to cold acclimation in Camellia japonica
Authors: Li Qingyuan , Lei Sheng , Du Kebing , Li Lizhi , Pang Xufeng , Wang Zhanchang , Wei Ming , Fu Shao , Hu Limin , Xu Lin
Published: November 2016

Camellia is a well-known ornamental flower native to Southeast of Asia, including regions such as Japan, Korea and South China. However, most species in the genus Camellia are cold sensitive. To elucidate the cold stress responses in camellia plants, we carried out deep transcriptome sequencing of ‘Jiangxue’, a cold-tolerant cultivar of Camellia japonica, and approximately 1,006 million clean reads were generated using Illumina sequencing technology. The assembly of the clean reads produced 367,620 transcripts, including 207,592 unigenes. Overall, 28,038 differentially expressed genes were identified during cold acclimation. Detailed elucidation of responses of transcription factors, protein kinases and plant hormone signalling-related genes described the interplay of signal that allowed the plant to fine-tune cold stress responses. On the basis of global gene regulation of unsaturated fatty acid biosynthesis- and jasmonic acid biosynthesis-related genes, unsaturated fatty acid biosynthesis and jasmonic acid biosynthesis pathways were deduced to be involved in the low temperature responses in C. japonica. These results were supported by the determination of the fatty acid composition and jasmonic acid content. Our results provide insights into the genetic and molecular basis of the responses to cold acclimation in camellia plants.
Concurrent profiling of polar metabolites and lipids in human plasma using HILIC-FTMS
Authors: Cai Xiaoming , Li Ruibin
Published: November 2016

Blood plasma is the most popularly used sample matrix for metabolite profiling studies, which aim to achieve global metabolite profiling and biomarker discovery. However, most of the current studies on plasma metabolite profiling focused on either the polar metabolites or lipids. In this study, a comprehensive analysis approach based on HILIC-FTMS was developed to concurrently examine polar metabolites and lipids. The HILIC-FTMS method was developed using mixed standards of polar metabolites and lipids, the separation efficiency of which is better in HILIC mode than in C5 and C18 reversed phase (RP) chromatography. This method exhibits good reproducibility in retention times (CVs < 3.43%) and high mass accuracy (<3.5 ppm). In addition, we found MeOH/ACN/Acetone (1:1:1, v/v/v) as extraction cocktail could achieve desirable gathering of demanded extracts from plasma samples. We further integrated the MeOH/ACN/Acetone extraction with the HILIC-FTMS method for metabolite profiling and smoking-related biomarker discovery in human plasma samples. Heavy smokers could be successfully distinguished from non smokers by univariate and multivariate statistical analysis of the profiling data, and 62 biomarkers for cigarette smoke were found. These results indicate that our concurrent analysis approach could be potentially used for clinical biomarker discovery, metabolite-based diagnosis, etc.
Relation between brain temperature and white matter damage in subacute carbon monoxide poisoning
Authors: Fujiwara Shunrou , Yoshioka Yoshichika , Matsuda Tsuyoshi , Nishimoto Hideaki , Ogawa Akira , Ogasawara Kuniaki , Beppu Takaaki
Published: November 2016

In the previous studies, carbon monoxide (CO) poisoning showed an imbalance between cerebral perfusion and metabolism in the acute phase and the brain temperature (BT) in these patients remained abnormally high from the acute to the subacute phase. As observed in chronic ischemic patients, BT can continuously remain high depending on impairments of cerebral blood flow and metabolism; this is because heat removal and production system in the brain may mainly be maintained by the balance of these two factors; thus, cerebral white matter damage (WMD) affecting normal metabolism may affect the BT in patients with CO poisoning. Here, we investigated whether the BT correlates with the degree of WMD in patients with subacute CO-poisoning. In 16 patients with subacute CO-poisoning, the BT and degree of WMD were quantitatively measured by using magnetic resonance spectroscopy and the fractional anisotropy (FA) value from diffusion tensor imaging dataset. Consequently, the BT significantly correlated with the degree of WMD. In particular, BT observed in patients with delayed neuropsychiatric sequelae, a crucial symptom with sudden-onset in the chronic phase after CO exposure, might indicate cerebral hypo-metabolism and abnormal hemodynamics like “matched perfusion,” in which the reduced perfusion matches the reduced metabolism.
Underwater superoleophobicity, anti-oil and ultra-broadband enhanced absorption of metallic surfaces produced by a femtosecond laser inspired by fish and chameleons
Authors: Yin K. , Song Y. X. , Dong X. R. , Wang C. , Duan J. A.
Published: November 2016

Reported here is the bio-inspired and robust function of underwater superoleophobic, anti-oil metallic surfaces with ultra-broadband enhanced optical absorption obtained through femtosecond laser micromachining. Three distinct surface structures are fabricated using a wide variety of processing parameters. Underwater superoleophobic and anti-oil surfaces containing coral-like microstructures with nanoparticles and mount-like microstructures are achieved. These properties of the as-prepared surfaces exhibit good chemical stability when exposed to various types of oils and when immersed in water with a wide range of pH values. Moreover, coral-like microstructures with nanoparticle surfaces show strongly enhanced optical absorption over a broadband wavelength range from 0.2–25 μm. The potential mechanism for the excellent performance of the coral-like microstructures with a nanoparticle surface is also discussed. This multifunctional surface has potential applications in military submarines, amphibious military aircraft and tanks, and underwater anti-oil optical counter-reconnaissance devices.
Structure and Function of FS50, a salivary protein from the flea Xenopsylla cheopis that blocks the sodium channel NaV1.5
Authors: Xu Xueqing , Zhang Bei , Yang Shilong , An Su , Ribeiro José M. C. , Andersen John F.
Published: November 2016

Naturally occurring toxins have been invaluable tools for the study of structural and functional relationships of voltage-gated sodium channels (VGSC). Few studies have been made of potential channel-modulating substances from blood-feeding arthropods. He we describe the characterization FS50, a salivary protein from the flea, Xenopsylla cheopis, that exhibits an inhibitory activity against the NaV1.5 channel with an IC50 of 1.58 μM. The pore-blocking mechanism of this toxin is evident from the kinetics of activation and inactivation suggesting that FS50 does not interfere with the voltage sensor of NaV1.5. FS50 exhibits high specificity for NaV1.5, since 10 μM FS50 had no discernable effect on voltage-gated Na+, K+ and Ca2+ channels in rat dorsal root ganglia or VGSC forms individually expressed in HEK 293T cells. Furthermore, intravenous injection of FS50 into rats and monkeys elicited recovery from arrhythmia induced by BaCl2, as would be expected from a blockade of NaV1.5. The crystal structure of FS50 revealed a βαββ domain similar to that of scorpion β toxin and a small N-terminal βαβ domain. Site-directed mutagenesis experiments have implicated a basic surface including the side chains of Arg 6, His 11 and Lys 32 as potentially important in the FS50 NaV1.5 interaction.
SIRT1 deacetylates the cardiac transcription factor Nkx2.5 and inhibits its transcriptional activity
Authors: Tang Xiaoqiang , Ma Han , Han Lei , Zheng Wei , Lu Yun-Biao , Chen Xiao-Feng , Liang Shu-Ting , Wei Gong-Hong , Zhang Zhu-Qin , Chen Hou-Zao , Liu De-Pei
Published: November 2016

The homeodomain transcription factor Nkx2.5/Csx is critically essential for heart specification, morphogenesis, and homeostasis. Acetylation/deacetylation is important for the localization, stability and activation of transcription factors. It remains unknown how Nkx2.5 is deacetylated and how Nkx2.5 acetylation determines its activity. In this study, we provide evidence that the NAD+-dependent class III protein deacetylase SIRT1 deacetylates Nkx2.5 in cardiomyocytes and represses the transcriptional activity of Nkx2.5. We show that SIRT1 interacts with the C-terminus of Nkx2.5 and deacetylates Nkx2.5 at lysine 182 in the homeodomain. The mutation of Nkx2.5 at lysine 182 reduces its transcriptional activity. Furthermore, SIRT1 inhibits the transcriptional activity of Nkx2.5 and represses the expression of its target genes partly by reducing Nkx2.5 binding to its co-factors, including SRF and TBX5. Taken together, these findings demonstrate that SIRT1 deacetylates Nkx2.5 and inhibits the transcriptional activity of Nkx2.5.
Transcriptomic analysis on the formation of the viable putative non-culturable state of beer-spoilage Lactobacillus acetotolerans
Authors: Liu Junyan , Deng Yang , Peters Brian M. , Li Lin , Li Bing , Chen Lequn , Xu Zhenbo , Shirtliff Mark E.
Published: November 2016

Lactic acid bacteria (LAB) are the most common beer-spoilage bacteria regardless of beer type, and thus pose significant problems for the brewery industry. The aim of this study was to investigate the genetic mechanisms involved in the ability of the hard-to-culture beer-spoilage bacteriumLactobacillus acetotoleransto enter into the viable putative non-culturable (VPNC) state. A genome-wide transcriptional analysis of beer-spoilageL. acetotoleransstrains BM-LA14526, BM-LA14527, and BM-LA14528 under normal, mid-term and VPNC states were performed using RNA-sequencing (RNA-seq) and further bioinformatics analyses. GO function, COG category, and KEGG pathway enrichment analysis were conducted to investigate functional and related metabolic pathways of the differentially expressed genes. Functional and pathway enrichment analysis indicated that heightened stress response and reduction in genes associated with transport, metabolic process, and enzyme activity might play important roles in the formation of the VPNC state. This is the first transcriptomic analysis on the formation of the VPNC state of beer spoilageL. acetotolerans.
Simultaneous determination of As, Hg, Sb, and Se in mineral fertilizers using ultrasonic extraction and CVG-ICP OES
Authors: Baika L. M. , Santos E. J. Dos , Herrmann A. B. , Grassi M. T.
Published: November 2016

An improved, precise and accurate method for simultaneous determination of As, Hg, Sb and Se in mineral fertilizers is proposed.
Fluorescent switching technology based on fluorescence resonance energy transfer for detecting dimethoate pesticides in environmental water
Authors: Sheng Zhen , Zhang Jianfeng , Li Chenyu , Chen Ligang
Published: November 2016

Dithizone functionalized CdTe quantum dots for detecting dimethoate pesticide with switch-on fluorescent strategy.
Molecular tuning of amino acids to form two-dimensional molecular networks driven by conformational preorganization
Authors: Youn Young-Sang , Jeon Aram , Kim Do Hwan , Lee Hee-Seung , Kim Sehun
Published: November 2016

We investigated the self-assembly of rationally designed γ-Phe on Au(111) using STM with DFT calculations. In contrast to α-Phe, γ-Phe self-assembled into 2D molecular network. The better self-association was attributed to conformational preorganization through intramolecular interaction.
Visible light-driven water oxidation with a subporphyrin sensitizer and a water oxidation catalyst
Authors: Yamamoto Masanori , Nishizawa Yusuke , Chábera Pavel , Li Fusheng , Pascher Torbjörn , Sundström Villy , Sun Licheng , Imahori Hiroshi
Published: November 2016

A newly designed contracted porphyrin achieved efficient visible light absorption and interfacial electron transfer for water oxidation in artificial photosynthesis.
In situ spectroscopic characterization of a solution-phase X-type ligand exchange at colloidal lead sulphide quantum dot surfaces
Authors: Kroupa D. M. , Anderson N. C. , Castaneda C. V. , Nozik A. J. , Beard M. C.
Published: November 2016

We employed quantitative NMR spectroscopy and spectrophotometric absorbance titration to study a quantum dot X-type ligand exchange reaction.
Effects of strong interactions between Ti and ceria on the structures of Ti/CeO2
Authors: Yao Xiao-Dan , Zhu Kong-Jie , Teng Bo-Tao , Yu Cao-Ming , Zhang Yun-Lei , Liu Ya , Fan Maohong , Wen Xiao-Dong
Published: November 2016

Ti adatoms monatomically disperse on CeO2(111) to form surface TiOx species; while surface O atom transfer leads to the restructuring of xTi-N-hollow and the formation of surface TiO2-like species.
The reaction mechanism of polyalcohol dehydration in hot pressurized water
Authors: Ruiz-Barragan Sergi , Ribas Ariño Jordi , Shiga Motoyuki
Published: November 2016

The use of high-temperature liquid water (HTW) as a reaction medium is a very promising technology in the field of green chemistry.
Dark states enhance the photocell power via phononic dissipation
Authors: Zhang Yiteng , Wirthwein Aaron , Alharbi Fahhad H. , Engel Gregory S. , Kais Sabre
Published: November 2016

The high efficiency of the photon-to-charge conversion process found in photosynthetic complexes has inspired researchers to explore a new route in designing artificial photovoltaic materials.
Combined electronic and thermodynamic approaches for enhancing the thermoelectric properties of Ti-doped PbTe
Authors: Komisarchik G. , Gelbstein Y. , Fuks D.
Published: November 2016

DFT combined with statistical thermodynamics is used for investigating the effects of phase separation and impurity states on the electronic properties of Ti-doped PbTe.
Photosensitive organic field effect transistors: the influence of ZnPc morphology and bilayer dielectrics for achieving a low operating voltage and low bias stress effect
Authors: Dey Anamika , Singh Ashish , Das Dipjyoti , Iyer Parameswar Krishnan
Published: November 2016

ZnPc based photosensitive-OFETs showed a reliable photo-responsivity of 2679.40 A W−1 and a photo-ON/OFF current ratio of 933.56 with a very low operating voltage (0 to −8 V).
Peculiarities of the photoinitiator-free photopolymerization of pentabrominated and pentafluorinated aromatic acrylates and methacrylates
Authors: Daikos Olesya , Naumov Sergej , Knolle Wolfgang , Heymann Katja , Scherzer Tom
Published: November 2016

Self-initiation of the photopolymerisation of brominated and fluorinated aromatic acrylates proceed via different mechanisms, both at high quantum yields (ca. 0.2).
Correction: Achieving high resolution and optimizing sensitivity in spatial frequency encoding NMR spectroscopy: from theory to practice
Authors: Plainchont Bertrand , Pitoux Daisy , Hamdoun Ghanem , Ouvrard Jean-Michel , Merlet Denis , Farjon Jonathan , Giraud Nicolas
Published: November 2016

Correction for ‘Achieving high resolution and optimizing sensitivity in spatial frequency encoding NMR spectroscopy: from theory to practice’ by Bertrand Plainchont et al., Phys. Chem. Chem. Phys., 2016, 18, 22827–22839.
Modulation of the relaxation dynamics of linear-shaped tetranuclear rare-earth clusters through utilizing different solvents
Authors: Zhang Ru-Xia , Chang Yi-Xin , Shen Hai-Yun , Wang Wen-Min , Zhou Xiao-Pu , Wang Ni-Ni , Cui Jian-Zhong , Gao Hong-Ling
Published: November 2016

Nine tetranuclear centrosymmetric linear complexes have been synthesized and the two differently solvated DyIII complexes exhibit different magnetic relaxation behaviors.
Heteroleptic mononuclear compounds of ruthenium(ii): synthesis, structural analyses, in vitro antitumor activity and in vivo toxicity on zebrafish embryos
Authors: Lenis-Rojas O. A. , Fernandes A. R. , Roma-Rodrigues C. , Baptista P. V. , Marques F. , Pérez-Fernández D. , Guerra-Varela J. , Sánchez L. , Vázquez-García D. , Torres M. López , Fernández A. , Fernández J. J.
Published: November 2016

Cytotoxic properties, DNA-interaction andin vivotoxicity were evaluated in Ru(ii) compounds.
Nanoarchitectonics: a navigator from materials to life
Authors: Ariga Katsuhiko
Published: November 2016

Nanoarchitectonics can work as a navigator to convert conventional materials into life-like high-level functional systems for materials innovation in the future.
Synthesis of 4-substituted 3-(2-hydroxyphenyl)-quinolines through an unexpected iron(iii) chloride promoted reaction of cyclic imine dibenzo[b,f][1,4]oxazepines with alkynes
Authors: Zhu Chao-Qun , Deng Zhuo-Fei , Zhang Yahong , Wang You-Qing
Published: November 2016

An unexpected FeCl3-promoted reaction of cyclic imine dibenzo[b,f][1,4]oxazepines with alkynes was studied to produce novel 4-substituted 3-(2-hydroxyphenyl)-quinolines with 34–88% yield.
Mono- and triiodophenyl isocyanate as radiopacifying agents for methacrylate-based copolymers; biocompatibility and non-toxicity
Authors: Shiralizadeh Saeed , Nasr-Isfahani Hossein , Keivanloo Ali , Bakherad Mohammad
Published: November 2016

New radiopaque acrylic copolymers were prepared via the copolymerization of methyl methacrylate (MMA) and acrylic acid (AA).
Neutralization of NaAlO2 solution with CO2 for synthesis of γ-Al2O3 nanoparticles, part 1: effects of synthesis parameters in semi-batch membrane dispersion microstructured reactor
Authors: Asadi Amir Atabak , Bazmi Mansour , Alavi Seyed Mahdi , Royaee Sayed Javid
Published: November 2016

Controlling characteristics of synthesized pseudoboehmite nanoparticles by means of parameters governing the neutralization process. Proposing formation mechanism of pseudoboehmite in three main stages: nucleation, aggregation and assembly.
Associated relationship between ventilation rates and indoor air quality
Authors: Cao Shi-Jie , Zhu Dong-Hao , Yang Yin-Bao
Published: November 2016

Ventilation represents a significant portion of building energy consumption.
DOX-Fe3O4@mSiO2-PO-FA nanocomposite for synergistic chemo- and photothermal therapy
Authors: Luo Xiangjie , Wang Ying , Lin Huiming , Qu Fengyu
Published: November 2016

A DOX-Fe3O4@mSiO2-PO-FA nanocomposite based drug delivery system for cancer chemotherapy and photothermal therapy.
Catalytic hydrolysis of HCN on ZSM-5 modified by Fe or Nb for HCN removal: surface species and performance
Authors: Song Zhongxian , Zhang Qiulin , Ning Ping , Wang Yu , Duan Yankang , Wang Jing , Huang Zhenzhen
Published: November 2016

Interactions present between Fe and Nb species resulted in larger amounts of isolated Fe3+, Nb5+, oligomeric FexOy and NbxOy clusters on zeolite catalysts, resulting in improved HCN hydrolysis.
Novel polymer with ionic liquid moieties for biodiesel synthesis from waste oils
Authors: Li Junqiao , Zhang Siyi , Tian Weiyong , Liang Xuezheng
Published: November 2016

A novel polymer with ionic liquid moieties was synthesized via a one-pot copolymerization and quaternization of 4-vinylpyridine, divinylbenzene and 1,2-dibromoethane.
A full set of iridium(iv) pyridine-alkoxide stereoisomers: highly geometry-dependent redox properties
Authors: Shopov Dimitar Y. , Rudshteyn Benjamin , Campos Jesús , Vinyard David J. , Batista Victor S. , Brudvig Gary W. , Crabtree Robert H.
Published: November 2016

A complete series of Ir(iv) diastereomers coordinated with chlorides and bidentate pyridine-alkoxide ligands was prepared, revealing a number of significant unusual properties.
Facile synthesis of hierarchical CoMoO4@NiMoO4 core–shell nanosheet arrays on nickel foam as an advanced electrode for asymmetric supercapacitors
Authors: Zhang Ziqing , Zhang Hongdan , Zhang Xinyang , Yu Deyang , Ji Ying , Sun Qiushi , Wang Ying , Liu Xiaoyang
Published: November 2016

Hierarchical CoMoO4@NiMoO4 core–shell nanosheet arrays synthesized via a two-step hydrothermal method with successive annealing exhibited outstanding electrochemical performance.
Stretchable biofuel cells as wearable textile-based self-powered sensors
Authors: Jeerapan Itthipon , Sempionatto Juliane R. , Pavinatto Adriana , You Jung-Min , Wang Joseph
Published: November 2016

This article describes stretchable textile-based biofuel cells acting as self-powered sensors for personalized healthcare, energy, and wearable applications.
Application research on PPARα-transgenic mice in preclinical safety evaluation of gemfibrozil
Authors: Li Yan , Mao Hongmei , Xu Yanfeng , Li Xiaocen , Pan Lishan , Wu Xin , Li Yang , Li Yi , He Jun
Published: November 2016

PPARα-transgenic mice could serve as a useful tool for preclinical safety evaluation of gemfibrozil.
Analysis of energy detection with diversity receivers over non‐identically distributed κ − μ shadowed fading channels
Authors: Al‐Hmood H. , Al‐Raweshidy H.S.
Published: November 2016

The performance of energy detection over κ − μ shadowed fading is analysed. The analysis is then extended to include the maximal ratio combining and square law combining schemes with non‐identically distributed branches. Moreover, the analysis over κ − μ extreme shadowed fading channel, that is utilised to model the wireless communications scenarios in enclosed areas, is also investigated. To this end, exact closed‐form expressions of the average area under the receiver operating characteristics curve are derived.
control of linear singular time‐delay systems subject to impulsive perturbations
Authors: Chen Wu‐Hua , Jiang Renhong , Lu Xiaomei , Zheng Wei Xing
Published: November 2016

This study addresses the problem of control for linear singular time‐delay systems subject to impulsive perturbations. Specifically, the impulses are allowed to be destabilising, i.e. they may degrade the closed‐loop performance of the considered systems. With the aid of a descriptor‐type impulse‐time‐dependent Lyapunov functional, a sufficient condition for the solvability of the problem is derived in terms of linear matrix inequalities (LMIs). By solving a set of LMIs, a desired state‐feedback controller is found, which guarantees that the closed‐loop system is impulse‐free, internally exponentially stable, and achieves a prescribed ‐gain. Finally, three numerical examples are provided to demonstrate the effectiveness of the proposed method.
Parameter estimation for pseudo‐linear systems using the auxiliary model and the decomposition technique
Authors: Ding Feng , Wang Feifei , Xu Ling , Hayat Tasawar , Alsaedi Ahmed
Published: November 2016

This study focuses on the parameter identification problems of pseudo‐linear systems. The main goal is to present recursive least squares (RLS) estimation methods based on the auxiliary model identification idea and the decomposition technique. First, an auxiliary model‐based RLS algorithm is given as a comparison. Second, to improve the computation efficiency, a decomposition‐based RLS algorithm is presented. Then for the system identification with missing data, an interval‐varying RLS algorithm is derived for estimating the system parameters. Furthermore, this study uses the decomposition technique to reduce the computational cost in the interval‐varying RLS algorithm and introduces the forgetting factors to track the time‐varying parameters. The simulation results show that the proposed algorithms can work well.
Distributed consensus extended Kalman filter: a variance‐constrained approach
Authors: Li Wenling , Jia Yingmin , Du Junping
Published: November 2016

This study is concerned with the distributed state estimation problem for non‐linear systems over sensor networks. By using the strategy of consensus on prior estimates, a distributed extended Kalman filter (EKF) is developed for each node to guarantee an optimised upper bound on the state estimation error covariance despite consensus terms and linearisation errors. The Kalman gain matrix is derived for each node by solving two Riccati‐like difference equations. It is shown that the estimation error is bounded in mean square under certain conditions. The effectiveness of the proposed filter is evaluated on an indoor localisation of a mobile robot with visual tracking systems.
HARPS-N high spectral resolution observations of Cepheids I. The Baade-Wesselink projection factor of δ Cep revisited
Authors: Nardetto N. , Poretti E. , Rainer M. , Fokin A. , Mathias P. , Anderson R. I. , Gallenne A. , Gieren W. , Graczyk D. , Kervella P. , Mérand A. , Mourard D. , Neilson H. , Pietrzynski G. , Pilecki B. , Storm J.
Published: November 2016

Context. The projection factor p is the key quantity used in the Baade-Wesselink (BW) method for distance determination; it converts radial velocities into pulsation velocities. Several methods are used to determine p, such as geometrical and hydrodynamical models or the inverse BW approach when the distance is known.

Aims. We analyze new HARPS-N spectra of δ Cep to measure its cycle-averaged atmospheric velocity gradient in order to better constrain the projection factor.

Methods. We first apply the inverse BW method to derive p directly from observations. The projection factor can be divided into three subconcepts: (1) a geometrical effect (p0); (2) the velocity gradient within the atmosphere (fgrad); and (3) the relative motion of the optical pulsating photosphere with respect to the corresponding mass elements (fo−g). We then measure the fgrad value of δ Cep for the first time.

Results. When the HARPS-N mean cross-correlated line-profiles are fitted with a Gaussian profile, the projection factor is pcc−g = 1.239 ± 0.034(stat.) ± 0.023(syst.). When we consider the different amplitudes of the radial velocity curves that are associated with 17 selected spectral lines, we measure projection factors ranging from 1.273 to 1.329. We find a relation between fgrad and the line depth measured when the Cepheid is at minimum radius. This relation is consistent with that obtained from our best hydrodynamical model of δ Cep and with our projection factor decomposition. Using the observational values of p and fgrad found for the 17 spectral lines, we derive a semi-theoretical value of fo−g. We alternatively obtain fo−g = 0.975 ± 0.002 or 1.006 ± 0.002 assuming models using radiative transfer in plane-parallel or spherically symmetric geometries, respectively.

Conclusions. The new HARPS-N observations of δ Cep are consistent with our decomposition of the projection factor. The next step will be to measure p0 directly from the next generation of visible interferometers. With these values in hand, it will be possible to derive fo−g directly from observations.
Orientation–free and differentially pumped addition of a low-flux reactive gas beam to a surface analysis system
Authors: Harthcock Colin , Jahanbekam Abdolreza , Eskelsen Jeremy R. , Lee David Y.
Published: November 2016

We describe an example of a piecewise gas chamber that can be customized to incorporate a low flux of gas-phase radicals with an existing surface analysis chamber for in situ and stepwise gas-surface interaction experiments without any constraint in orientation. The piecewise nature of this gas chamber provides complete angular freedom and easy alignment and does not require any modification of the existing surface analysis chamber. In addition, the entire gas-surface system is readily differentially pumped with the surface chamber kept under ultra-high-vacuum during the gas-surface measurements. This new design also allows not only straightforward reconstruction to accommodate the orientation of different surface chambers but also for the addition of other desired features, such as an additional pump to the current configuration. Stepwise interaction between atomic oxygen and a highly ordered pyrolytic graphite surface was chosen to test the effectiveness of this design, and the site-dependent O-atom chemisorption and clustering on the graphite surface were resolved by a scanning tunneling microscope in the nm-scale. X-ray photoelectron spectroscopy was used to further confirm the identity of the chemisorbed species on the graphite surface as oxygen.
Nonequilibrium all-atom molecular dynamics simulation of the bubble cavitation and application to dissociate amyloid fibrils
Authors: Hoang Viet Man , Derreumaux Philippe , Nguyen Phuong H.
Published: November 2016

The cavitation of gas bubbles in liquids has been applied to different disciplines in life and natural sciences, and in technologies. To obtain an appropriate theoretical description of effects induced by the bubble cavitation, we develop an all-atom nonequilibrium molecular-dynamics simulation method to simulate bubbles undergoing harmonic oscillation in size. This allows us to understand the mechanism of the bubble cavitation-induced liquid shear stress on surrounding objects. The method is then employed to simulate an Aβ fibril model in the presence of bubbles, and the results show that the bubble expansion and contraction exert water pressure on the fibril. This yields to the deceleration and acceleration of the fibril kinetic energy, facilitating the conformational transition between local free energy minima, and leading to the dissociation of the fibril. Our work, which is a proof-of-concept, may open a new, efficient way to dissociate amyloid fibrils using the bubble cavitation technique, and new venues to investigate the complex phenomena associated with amyloidogenesis.
Well posedness and exponential stability in a wave equation with a strong damping and a strong delay
Authors: Messaoudi Salim A. , Fareh Abdelfeteh , Doudi Nadjet
Published: November 2016

In this paper, we consider a wave equation with a strong damping and a strong constant (respectively, distributed) delay. We prove the well-posedness and establish an exponential decay result under a suitable assumption on the weight of the damping and the weight of the delay.
Vapor-deposited alcohol glasses reveal a wide range of kinetic stability
Authors: Tylinski M. , Chua Y. Z. , Beasley M. S. , Schick C. , Ediger M. D.
Published: November 2016

In situ AC nanocalorimetry was used to characterize vapor-deposited glasses of six mono- and di-alcohol molecules. Benzyl alcohol glasses with high kinetic stability and decreased heat capacity were prepared. When annealed above the glass transition temperature Tg, transformation of these glasses into the supercooled liquid took 103.4 times longer than the supercooled liquid relaxation time (τα). This kinetic stability is similar to other highly stable organic glasses prepared by vapor deposition and is the first clear demonstration of an alcohol forming a stable glass. Vapor deposited glasses of five other alcohols exhibited moderate or low kinetic stability with isothermal transformation times ranging from 100.7 to 102 τα. This wide range of kinetic stabilities is useful for investigating the factors that control stable glass formation. Using our current results and literature data, we compare the kinetic stability of vapor deposited glasses prepared from 14 molecules and find a correlation with the value of τα at 1.25 Tg. We also observe that some vapor-deposited glasses exhibit decreased heat capacity without increased kinetic stability.
Influence of C60 co-deposition on the growth kinetics of diindenoperylene–From rapid roughening to layer-by-layer growth in blended organic films
Authors: Lorch C. , Novák J. , Banerjee R. , Weimer S. , Dieterle J. , Frank C. , Hinderhofer A. , Gerlach A. , Carla F. , Schreiber F.
Published: November 2016

We investigated the growth of the two phase-separating materials diindenoperylene (DIP) and buckminsterfullerene C60 with different mixing ratio in real-time and in situ by X-ray scattering experiments. We found that at room temperature, mixtures with an excess of DIP show a growth mode which is very close to the perfect layer-by-layer limit with DIP crystallites forming over the entire film thickness. An unexpected increase in the island size is observed for these mixtures as a function of film thickness. On the other hand, equimolar and C60 dominated mixtures grow with poor crystallinity but form very smooth films. Additionally, it is observed that higher substrate temperatures lead to an increase in the length scale of phase separation with film thickness.
Phase transformation induced by electric field and mechanical stress in Mn-doped (Bi1/2Na1/2)TiO3-(Bi1/2K1/2)TiO3 ceramics
Authors: Ehara Yoshitaka , Novak Nikola , Ayrikyan Azatuhi , Geiger Philipp T. , Webber Kyle G.
Published: November 2016

Electric-field- and stress-induced phase transformations were investigated in polycrystalline 0.5 mol. % Mn-doped (1−x)(Bi1/2Na1/2)TiO3-x(Bi1/2K1/2)TiO3 (x = 0.1, 0.2). To characterize the effect of electric field and stress on the stability of the ferroelectric and relaxor states, polarization- and current density-electric field curves, as well as the stress-strain response as a function of temperature were characterized. Analogous to the observed electrical behavior, the macroscopic mechanical constitutive behavior showed a closed hysteresis at elevated temperatures, indicating a reversible stress-induced relaxor-to-ferroelectric transformation. The electrical and mechanical measurements were used to construct electric field–temperature and stress-temperature phase diagrams, which show similar characteristics. These data show that a mechanical compressive stress, similarly to an electric field, can induce long-range ferroelectric order in a relaxor ferroelectric.
GW-BSE approach on S1 vertical transition energy of large charge transfer compounds: A performance assessment
Authors: Ziaei Vafa , Bredow Thomas
Published: November 2016

In this work, we apply many-body perturbation theory (MBPT) on large critical charge transfer (CT) complexes to assess its performance on the S1 excitation energy. Since the S1 energy of CT compounds is heavily dependent on the Hartree-Fock (HF) exchange fraction in the reference density functional, MBPT opens a new way for reliable prediction of CT S1 energy without explicit knowledge of suitable amount of HF-exchange, in contrary to the time-dependent density functional theory (TD-DFT), where depending on various functionals, large errors can arise. Thus, simply by starting from a (semi-)local reference functional and performing update of Kohn-Sham (KS) energies in the Green’s function G while keeping dynamical screened interaction (W(ω)) frozen to the mean-field level, we obtain impressingly highly accurate S1 energy at slightly higher computational cost in comparison to TD-DFT. However, this energy-only updating mechanism in G fails to work if the initial guess contains a fraction or 100% HF-exchange, and hence considerably inaccurate S1 energy is predicted. Furthermore, eigenvalue updating both in G and W(ω) overshoots the S1 energy due to enhanced underscreening of W(ω), independent of the (hybrid-)DFT starting orbitals. A full energy-update on top of HF orbitals even further overestimates the S1 energy. An additional update of KS wave functions within the Quasi-Particle Self-Consistent GW (QSGW) deteriorates results, in stark contrast to the good results obtained from QSGW for periodic systems. For the sake of transferability, we further present data of small critical non-charge transfer systems, confirming the outcomes of the CT-systems.
Generation of circularly polarized waves based on electro inductive-wave (EIW) coupling to chains of complementary split ring resonators
Authors: Ortiz Noelia , Crespo Gonzalo , Iriarte Juan Carlos , Falcone Francisco
Published: November 2016

In this work, Electro-Inductive wave (EIW) propagation phenomenon is employed in order to introduce a polarization rotation capability in a rectangular patch antenna. The EIW propagation phenomenon is used to master the field distribution within the rectangular patch, and hence, to change the polarization of a patch antenna, which is shown to change from linear to circular polarization. EIW propagation is supported by a chain of Complementary Split Ring Resonators printed in a rectangular patch antenna at specific locations. This principle of operation is demonstrated with the design, fabrication, and measurement of antenna prototypes. Experimental results confirm numerical analysis, providing a simple antenna configuration with polarization variation capabilities, extendable to multiple configurations, in radiated waves as well as in guided wave phenomena.
Soft tunable diffractive optics with multifunctional transparent electrodes enabling integrated actuation
Authors: Ji Xiaobin , Rosset Samuel , Shea Herbert R.
Published: November 2016

We present a stretchable tunable transmission grating in which the optical surface serves simultaneously as an electrode for electrostatic actuation. Tunable optics based on elastomers allow for a large tuning range, but integrating an actuator generally significantly increases the device footprint. By combining the optical and electrical functions into one multifunctional transparent material, we use here the grating as an integral part of a dielectric elastomer actuator and hence avoid placing actuators around the grating. The grating/electrode consists of a 750 nm thick soft ionogel, which is bonded on both sides of a 13 μm thick silicone membrane. The top ionogel electrode is corrugated (2 μm pitch) and serves as the diffraction grating. The bottom electrode is planar. Applying a voltage between the electrodes generates a Maxwell pressure, leading to the in-plane expansion of the elastomer and electrodes. The linear actuation strain of 12.8% is obtained at 1300 V. The ionogel grating maintains accurately its period after 500 cycles and after one-month storage. The ionogel electrodes present self-clearing properties, allowing the operation of the actuator close to the breakdown voltage. This device presents an unprecedented level of integration by making accurate grating structures directly on a transparent soft ionogel conductor, which opens broad possibilities for making tunable optics.
Electrical detection of magnetic domain walls by inverse and direct spin Hall effect
Authors: Pham V. T. , Zahnd G. , Marty A. , Savero Torres W. , Jamet M. , Noël P. , Vila L. , Attané J. P.
Published: November 2016

Domain wall (DW) detection is a prerequisite to perform current-induced DW motion. In this letter, we demonstrate a detection method, based on the ability for a ferromagnetic nanowire, in which a DW is pinned, to inject or detect a pure spin current. The device consists of such a ferromagnetic nanowire in contact with an orthogonal spin Hall effect (SHE) nanowire. When a current flows along the ferromagnetic nanowire, and provided a DW is pinned, the pure spin current is transformed into a transverse voltage by inverse spin Hall effect (ISHE). In the reciprocal configuration, the pure spin current created by the direct SHE, generates a transverse voltage along the ferromagnetic wire. Finite element method (FEM) simulations allow estimating the Pt spin Hall angle (SHA) (7.5 ± 0.5%). This technique provides an electrical way to study the DW motion, a device akin to the ferromagnetic/spin Hall effect bilayers typically used for spin-orbit torques experiments.
Wireless actuation with functional acoustic surfaces
Authors: Qiu T. , Palagi S. , Mark A. G. , Melde K. , Adams F. , Fischer P.
Published: November 2016

Miniaturization calls for micro-actuators that can be powered wirelessly and addressed individually. Here, we develop functional surfaces consisting of arrays of acoustically resonant micro-cavities, and we demonstrate their application as two-dimensional wireless actuators. When remotely powered by an acoustic field, the surfaces provide highly directional propulsive forces in fluids through acoustic streaming. A maximal force of ∼0.45 mN is measured on a 4 × 4 mm2 functional surface. The response of the surfaces with bubbles of different sizes is characterized experimentally. This shows a marked peak around the micro-bubbles' resonance frequency, as estimated by both an analytical model and numerical simulations. The strong frequency dependence can be exploited to address different surfaces with different acoustic frequencies, thus achieving wireless actuation with multiple degrees of freedom. The use of the functional surfaces as wireless ready-to-attach actuators is demonstrated by implementing a wireless and bidirectional miniaturized rotary motor, which is 2.6 × 2.6 × 5 mm3 in size and generates a stall torque of ∼0.5 mN·mm. The adoption of micro-structured surfaces as wireless actuators opens new possibilities in the development of miniaturized devices and tools for fluidic environments that are accessible by low intensity ultrasound fields.
Thermodynamic properties of triangle-well fluids in two dimensions: MC and MD simulations
Authors: Reyes Yuri , Bárcenas Mariana , Odriozola Gerardo , Orea Pedro
Published: November 2016

With the aim of providing complementary data of the thermodynamics properties of the triangular well potential, the vapor/liquid phase diagrams for such potential with different interaction ranges were calculated in two dimensions by Monte Carlo and molecular dynamics simulations; also, the vapor/liquid interfacial tension was calculated. As reported for other interaction potentials, it was observed that the reduction of the dimensionality makes the phase diagram to shrink. Finally, with the aid of reported data for the same potential in three dimensions, it was observed that this potential does not follow the principle of corresponding states.
Communication: No guidance needed: Ordered structures and transformations of thin methanol ice on hydrophobic surfaces
Authors: He Xing , Wu Chengyi , Yang Ding-Shyue
Published: November 2016

A clear knowledge of structures is essential to the understanding and potential control of complex interfacial phenomena that involve multiple intermolecular and surface interactions of different strengths. Molecules with the ability to form hydrogen bonds are often of particular interest. Here, we report the observation of 2- and 3-dimensional ordered assemblies of methanol molecules on hydrophobic silicon surfaces, using reflection high-energy electron diffraction. Direct structure probing reveals that the crystallization temperatures and the structural transformations of the hydrogen-bonded networks are far beyond a single-stage description and strongly depend on the thermal annealing procedures used. Such results elucidate the unique self-assembling behavior of interfacial methanol even without much guidance from the smooth substrate.
Pt thickness dependence of spin Hall effect switching of in-plane magnetized CoFeB free layers studied by differential planar Hall effect
Authors: Mihajlović G. , Mosendz O. , Wan L. , Smith N. , Choi Y. , Wang Y. , Katine J. A.
Published: November 2016

We introduce a differential planar Hall effect method that enables the experimental study of spin orbit torque switching of in-plane magnetized free layers in a simple Hall bar device geometry. Using this method, we study the Pt thickness dependence of switching currents and show that they decrease monotonically down to the minimum experimental thickness of ∼5 nm, while the critical current and power densities are very weakly thickness dependent, exhibiting the minimum values of Jc0 = 1.1 × 108 A/cm2 and ρJc02=0.6×1012 W/cm3 at this minimum thickness. Our results suggest that a significant reduction of the critical parameters could be achieved by optimizing the free layer magnetics, which makes this technology a viable candidate for fast, high endurance and low-error rate applications such as cache memories.
Visualization of deep ultraviolet photons based on Förster resonance energy transfer and cascade photon reabsorption in diphenylalanine-carbon nitrides composite film
Authors: Gan Zhixing , Zhou Weiping , Chen Zhihui , Wang Huan , Di Yunsong , Huang Shisong
Published: November 2016

A diphenylalanine (L-Phe-L-Phe, FF)-carbon nitride composite film is designed and fabricated to visualize the deep ultraviolet (DUV, 245–290 nm) photons. The FF film, composed of diphenylalanine molecules, doped with carbon nitrides shows blue emission under excitation of DUV light, which makes the DUV beam observable. Both Förster resonance energy transfer and cascade photon reabsorption contribute to the conversion of photon energy. First, the FF is excited by the DUV photons. On one hand, the energy transfers to the embedded carbon nitrides through nonradiative dipole–dipole couplings. On the other hand, the 284 nm photons emitted from the FF would further excite the carbon nitrides, which will finally convert to blue fluorescence. Herein, the experimental demonstration of a simple device for the visualization of high DUV fluxes is reported.
Evolution of the eucalypts – an interpretation from the macrofossil record
Authors: Hill Robert S. , Beer Yelarney K. , Hill Kathryn E. , Maciunas Elizabeth , Tarran Myall A. , Wainman Carmine C.
Published: November 2016

Eucalypts have influenced the fire ecology of the Australian landscape more than any other plant group. They are the iconic plant taxon in the Australian vegetation today, but their origin, early evolution and migration remain poorly understood, mostly because of a remarkably sparse and underworked fossil record. However, a recent major macrofossil find in southern South America, coupled with increasing sophistication of molecular phylogenetic and palynological research allow for a more comprehensive summary of the likely early history of this group of genera. It is likely that the origin was close to the Cretaceous–Paleogene boundary, somewhere in the Weddellian Biogeographic Province (which includes southern South America, western Antarctica and south-eastern Australia), in an area with high natural fire frequency. Evidence for the early record of eucalypts in Australia and their eventual spread across the continent, leading to their current dominance of the Australian plant biomass is growing and is consistent with a drying climate and increasing fire frequency following a very wet period during the Paleogene. The causes of the extinction of eucalypts from South America and probably New Zealand are considered, but remain obscure.
Alan Forrest Reid 1931–2013
Authors: Reid K.
Published: November 2016

Dr Alan Reid is remembered as the founding father of automated mineralogy. He achieved international recognition as a research scientist, and was also a visionary leader within CSIRO, Australia's largest scientific organization. Reid contributed a distinguished body of basic research to solid state chemistry, publishing on organometallics, thermodynamics, crystal structures, high pressure minerals and mineral processing. He went on to lead development of processes that greatly benefited industry. These included the solar absorber surface AMCRO, and the QEM*SEM analysis that automatically characterized mineral assemblages. As an Institute Director at CSIRO he made important contributions to the structure and business processes of the organization, during a period of upheaval unprecedented in its history. It was Reid's leadership and perseverance that led to the establishment of the Queensland Centre for Advanced Technologies, the Australian Resources Research Centre in Western Australia, and major redevelopment of the CSIRO site at North Ryde in NSW. A master of broad collaboration with researchers, academics, companies and government agencies, when he retired from CSIRO Reid further benefited Australian science as a consultant to government and industry. The mineral reidite, a high pressure phase of ZrSiO4, is named after this tireless polymath.