bluuebunny/crossref_metadata_2025 huggingface dataset:
A codon-shuffling method to prevent reversion during production of replication-defective herpesvirus stocks: Implications for herpesvirus vaccines
Authors: Li Gang , Ward Charles , Yeasmin Rukhsana , Skiena Steven , Krug Laurie T. , Forrest J. Craig
Published: March 2017

Herpesviruses establish life-long chronic infections that place infected hosts at risk for severe disease. Herpesvirus genomes readily undergo homologous recombination (HR) during productive replication, often leading to wild-type (WT) reversion during complementation of replication-defective and attenuated viruses via HR with the helper gene provided in trans. To overcome this barrier, we developed a synthetic-biology approach based on a technique known as codon shuffling. Computer-assisted algorithms redistribute codons in a helper gene, thereby eliminating regions of homology, while enabling manipulation of factors such as codon-pair bias and CpG content to effectively titrate helper-gene protein levels. We apply this technique to rescue the replication of a murine gammaherpesvirus engineered with a mutation in the major immediate-early transactivator protein RTA. Complementation with codon-shuffled RTA constructs did not yield any WT revertant virus, a sharp contrast to WT virus contamination frequently observed during complementation with an unmodified helper gene. We further demonstrate the importance of eliminating WT virus contamination in an animal model of gammaherpesvirus lethality. We propose complementation by codon shuffling as a means to produce replication-defective or attenuated viruses. This method has immediate utility for investigating roles of essential genes in viral replication and will better enable future development of herpesvirus vaccines.
Three-dimensional structures of the tracheal systems of Anopheles sinensis and Aedes togoi pupae
Authors: Ha Young-Ran , Yeom Eunseop , Ryu Jeongeun , Lee Sang-Joon
Published: March 2017

Mosquitoes act as a vector for the transmission of disease. The World Health Organization has recommended strict control of mosquito larvae because of their “few, fixed, and findable” features. The respiratory system of mosquito larvae and pupae in the water has a weak point. As aquatic organisms, mosquito larvae and pupae inhale atmosphere oxygen. However, the mosquito pupae have a non-feeding stage, unlike the larvae. Therefore, detailed study on the tracheal system of mosquito pupae is helpful for understanding their survival strategy. In this study, the three-dimensional (3D) structures of the tracheal systems ofAnopheles sinensisandAedes togoipupae were comparatively investigated using synchrotron X-ray microscopic computed tomography. The respiratory frequencies of the dorsal trunks were also investigated. Interestingly, the pupae of the two mosquito species possess special tracheal systems of which the morphological and functional features are distinctively different. The respiratory frequency ofAe. togoiis higher than that ofAn. sinensis. These differences in the breathing phenomena and 3D structures of the respiratory systems of these two mosquito species provide an insight into the tracheal systems of mosquito pupae.
One-pot synthesis of alternating peptides exploiting a new polymerization technique based on Ugi's 4CC reaction
Authors: Koyama Yasuhito , Gudeangadi Prashant G.
Published: March 2017

A catalyst-free, one-pot synthetic technique for alternating peptides was developed on the basis of Ugi's 4 component condensation reaction.
Kinetics of ozone decomposition in porous In2O3 monoliths
Authors: Klawinski Danielle , Weinberger Christian , Klaus Dominik , Smått Jan-Henrik , Tiemann Michael , Wagner Thorsten
Published: March 2017

We determine ozone decomposition on indium oxide by utilizing the gas transducing properties of hierarchically porous monoliths.
Photocatalytic CO2 reduction using water as an electron donor by a powdered Z-scheme system consisting of metal sulfide and an RGO–TiO2 composite
Authors: Takayama Tomoaki , Sato Ko , Fujimura Takehiro , Kojima Yuki , Iwase Akihide , Kudo Akihiko
Published: March 2017

CuGaS2, (AgInS2)x–(ZnS)2−2x, Ag2ZnGeS4, Ni- or Pb-doped ZnS, (ZnS)0.9–(CuCl)0.1, and ZnGa0.5In1.5S4 showed activities for CO2 reduction to form CO and/or HCOOH in an aqueous solution containing K2SO3 and Na2S as electron donors under visible light irradiation. Among them, CuGaS2 and Ni-doped ZnS photocatalysts showed relatively high activities for CO and HCOOH formation, respectively. CuGaS2 was applied in a powdered Z-scheme system combining with reduced graphene oxide (RGO)-incorporated TiO2 as an O2-evolving photocatalyst. The powdered Z-scheme system produced CO from CO2 in addition to H2 and O2 due to water splitting. Oxygen evolution with an almost stoichiometric amount indicates that water was consumed as an electron donor in the Z-schematic CO2 reduction. Thus, we successfully demonstrated CO2 reduction of artificial photosynthesis using a simple Z-scheme system in which two kinds of photocatalyst powders (CuGaS2 and an RGO–TiO2 composite) were only dispersed in water under 1 atm of CO2.
Prediction of metabolic fluxes from gene expression data with Huber penalty convex optimization function
Authors: Zhang Shao-Wu , Gou Wang-Long , Li Yan
Published: March 2017

As one of the critical parameters of a metabolic pathway, the metabolic flux in a metabolic network serves as an essential role in physiology and pathology.
Electric-field-induced assembly of Ag nanoparticles on a CuO nanowire using ambient electrospray ionization
Authors: Fang Hairui , Wang Dong , Yuan Long , Wu Xiaofeng , Guo Hongping , Chen Huanwen , Huang Keke , Feng Shouhua
Published: March 2017

A direct electric-field-induced assembly of a hybrid nanostructure of charged Ag clusters on a CuO nanowire was carried out using ambient electrospray ionization.
In situ anion exchange synthesis of In2S3/In(OH)3 heterostructures for efficient photocatalytic degradation of MO under solar light
Authors: Qiao Zheng , Yan Tingjiang , Li Wenjuan , Huang Baibiao
Published: March 2017

In2S3/In(OH)3 heterostructures which were synthesized via an in situ anion exchange reaction and the hydrothermal process displayed excellent photocatalytic activity compared to pure components and the reported In2S3/In2O3.
Metal–organic frameworks (MOFs) as highly efficient agents for boron removal and boron isotope separation
Authors: Lyu Jiafei , Liu Hongxu , Zhang Jingshuang , Zeng Zhouliangzi , Bai Peng , Guo Xianghai
Published: March 2017

A variety of MOFs were observed with ZIF-8, to our knowledge, showing the highest boron uptake and MIL-101(Cr) with an unprecedentedly high boron isotope separation factor.
Formation mechanism and properties of fluoride–phosphate conversion coating on titanium alloy
Authors: Wang Shuaixing , Liu Xiaohui , Wang Liqiang , Wen Qingjie , Du Nan , Huang Jianhang
Published: March 2017

Formation mechanism of fluoride–phosphate conversion coating on titanium alloy.
In situgrowth of TiO2/SiO2nanospheres on glass substratesviasolution impregnation for antifogging
Authors: Liu Fang , Shen Jie , Zhou Wuyi , Zhang Shiying , Wan Long
Published: March 2017

Uniform TiO2/SiO2nanospheres around 500 nm werein situfabricated on substrates using a facile soft templating route for super-hydrophilic antifogging.
Effect of surface physicochemical properties on the flocculation behavior of Bacillus licheniformis
Authors: Wang Zhi , Chen Zhen , Yang Lijie , Tan Fen , Wang Yuanpeng , Li Qingbiao , Chang You-Im , Zhong Chuan-Jian , He Ning
Published: March 2017

Flocculation model ofB. licheniformisCGMCC 2876 deduced by XDLVO and surface thermodynamic characterization.
An alternating polymer with fluorinated quinoxaline and 2,7-carbazole segments for photovoltaic devices
Authors: Qu Bo , Wu Haimei , Zhao Baofeng , Liu Hongli , Gao Chao , Qi Xin , Zhao Yifan , Xuan Liyang , Wei Wei
Published: March 2017

Compared to the non-fluorinated counterpart, PCzFTQx-based device exhibited an enhanced PCE of 5.19% with corresponding high Voc of 0.94 V.
Tuning the selectivity and activity of Au catalysts for carbon dioxide electroreduction via grain boundary engineering: a DFT study
Authors: Dong Cunku , Fu Jianyu , Liu Hui , Ling Tao , Yang Jing , Qiao Shi Zhang , Du Xi-Wen
Published: March 2017

Grain boundaries on the Au(110) surface facilitate the production of liquid fuel CH3OH for CO2electroreduction by strongly binding the CO intermediate.
Hierarchical NiCo2O4/Co3O4/NiO porous composite: a lightweight electromagnetic wave absorber with tunable absorbing performance
Authors: Liu Xiaofang , Hao Chengcheng , Jiang He , Zeng Min , Yu Ronghai
Published: March 2017

Hierarchical NiCo2O4/Co3O4/NiO composite was fabricated through a facile hydrothermal method, followed by a post-annealing treatment.
Dicarboxylic acids as pH sensors for hyperpolarized13C magnetic resonance spectroscopic imaging
Authors: Korenchan D. E. , Taglang C. , von Morze C. , Blecha J. E. , Gordon J. W. , Sriram R. , Larson P. E. Z. , Vigneron D. B. , VanBrocklin H. F. , Kurhanewicz J. , Wilson D. M. , Flavell R. R.
Published: March 2017

Hyperpolarized [2-13C,D10]diethylmalonic acid demonstrates long-lived signal enhancements for high-accuracy pH imagingvia13C MR spectroscopic imaging.
Local collection, reaction and analysis with theta pipette emitters
Authors: Saha-Shah Anumita , Karty Jonathan A. , Baker Lane A.
Published: March 2017

A mobile nanofluidic device based on theta pipettes was developed for “collect-react-analyze” measurements of small volumes of a sample collected locally from biological samples.
Strategizing method optimization of microwave-assisted extraction of plant phenolics by developing standard working principles for universal robust optimization
Authors: Kala Harneet Kaur , Mehta Rajendra , Sen Kamal Kumar , Tandey Roshni , Mandal Vivekananda
Published: March 2017

Empowering botanical extraction through microwave based green technology by proposing 8 golden principles for global optimization. A much needed boost for research in the pharma and food industries.
Green-fluorescent nitrogen-doped carbon nanodots for biological imaging and paper-based sensing
Authors: Shi Lihong , Zhao Bo , Li Xiaofeng , Zhang Guomei , Zhang Yan , Dong Chuan , Shuang Shaomin
Published: March 2017

Green-fluorescent nitrogen-doped carbon nanodots (N-CDs) have been fabricated by hydrothermal treatment of oolong tea.
A simple method for simultaneous determination of acetaldehyde, acetone, methanol, and ethanol in the atmosphere and natural waters
Authors: Giubbina Fernanda F. , Scaramboni Caroline , De Martinis Bruno S. , Godoy-Silva Daniely , Nogueira Raquel F. P. , Campos M. Lucia A. M.
Published: March 2017

Despite the increasing use of ethanol fuel, there is a great scarcity of data on the abundance of this alcohol and associated species in the atmosphere and natural waters.
Stabilizing the monomeric amyloid-β peptide by tyrocidine A prevents and reverses amyloidogenesis without the accumulation of oligomers
Authors: Wen Gesi , Qin Wenjing , Chen Daoyuan , Wang Youqiao , Yue Xin , Liu Ziyi , Cao Yingnan , Du Jun , Zhou Binhua , Bu Xianzhang
Published: March 2017

Stabilizing the monomeric amyloid-β peptide by tyrocidine A prevents accumulation of oligomers.
Convenient preparation of 4-diazoisochroman-3-imines and 3-subsituted 3,5-dihydroisochromeno[3,4-d][1,2,3]triazoles
Authors: Ren Anni , Lu Ping , Wang Yanguang
Published: March 2017

4-Diazoisochroman-3-imines were prepared via the Cu(i)-catalyzed reaction of (2-ethynylphenyl)methanols with sulfonyl azides, and converted to 3,5-dihydroisochromeno[3,4-d][1,2,3]triazoles by reaction with primary amines under catalyst-free conditions.
A cobalt(ii) complex with unique paraSHIFT responses to anions
Authors: O’Neill E. S. , Kolanowski J. L. , Bonnitcha P. D. , New E. J.
Published: March 2017

A cobalt(ii) complex can distinguish between anions by observing the paramagnetic 1H NMR shift.
Efficient bioremediation of radioactive iodine using biogenic gold nanomaterial-containing radiation-resistant bacterium, Deinococcus radiodurans R1
Authors: Choi Mi Hee , Jeong Sun-Wook , Shim Ha Eun , Yun Seong-Jae , Mushtaq Sajid , Choi Dae Seong , Jang Beom-Su , Yang Jung Eun , Choi Yong Jun , Jeon Jongho
Published: March 2017

A new bioremediation method is developed by using a gold nanomaterial-containing radiation-resistant bacterium.
Photochemically assisted fast abiotic oxidation of manganese and formation of δ-MnO2nanosheets in nitrate solution
Authors: Jung Haesung , Chadha Tandeep S. , Kim Doyoon , Biswas Pratim , Jun Young-Shin
Published: March 2017

A novel two-step abiotic inorganic Mn2+oxidation pathwayvianitrate photolysis unlocks fast δ-Mn(iv)O2nanosheet formation from aqueous Mn2+.
Azomethine-isocyanide [3+2] cycloaddition to imidazoles promoted by silver and DBU
Authors: Huang Xiaoshan , Cong Xuefeng , Mi Pengbing , Bi Xihe
Published: March 2017

A new silver-promoted [3+2] cycloaddition of azomethine ylides with isocyanides has been described to construct a variety of 1,2,4-trisubstituted imidazoles of vital bioactive molecules.
Self-assembly of magnesium-seamed hexameric pyrogallol[4]arene nanocapsules
Authors: Zhang Chen , Patil Rahul S. , Li Tao , Barnes Charles L. , Atwood Jerry L.
Published: March 2017

The magnesium-seamed hexameric pyrogallol[4]arene nanocapsule and its cocrystallization with pyridine molecules are presented.
Sandwich rare earth complexes simultaneously involving aromatic phthalocyanine and antiaromatic hemiporphyrazine ligands showing a predominantly aromatic nature
Authors: Liu Wenbo , Pan Houhe , Wang Ziqian , Wang Kang , Qi Dongdong , Jiang Jianzhuang
Published: March 2017

Sandwich rare earth complexes involving aromatic phthalocyanine and antiaromatic hemiporphyrazine ligands were prepared with their predominantly aromatic nature revealed by spectroscopic and theoretical results.
A metal–organic framework devised Co–N doped carbon microsphere/nanofiber hybrid as a free-standing 3D oxygen catalyst
Authors: Yang Wenxiu , Liu Xiangjian , Chen Lulu , Liang Liang , Jia Jianbo
Published: March 2017

A 3D microsphere/nanofiber composite which was prepared by electrospinning can act as an extremely active and stable non-noble metal oxygen catalyst in both acidic and basic solutions.
Assembly of titanium-oxo cations with copper-halide anions to form supersalt-type cluster-based materials
Authors: Fang Wei-Hui , Zhang Lei , Zhang Jian
Published: March 2017

A facile approach for the synthesis of binary titanium-oxo and copper-halide cluster-based crystalline materials with salt-like packing has been successfully established.
Can there be a multi-bond between noble gas and metal? A theoretical study of F2XeMoF2
Authors: Gao Kunqi , Sheng Li
Published: March 2017

Towards noble-gas multiple bond: theoretical calculations predict the formation of a Xe–Mo double bond in the molecule, F2XeMoF2.
Probing the bonding of CO to heteronuclear group 4 metal–nickel clusters by photoelectron spectroscopy
Authors: Zou Jinghan , Xie Hua , Yuan Qinqin , Zhang Jumei , Dai Dongxu , Fan Hongjun , Tang Zichao , Jiang Ling
Published: March 2017

MNi(CO)3− (M = Ti, Zr, Hf) was characterized to be the smallest metal carbonyl with all of the main modes of metal–CO coordination.
The role of conformational heterogeneity in regulating the apoptotic activity of BAX protein
Authors: Kao Te-Yu , Tsai Chia-Jung , Lan Yu-Jing , Chiang Yun-Wei
Published: March 2017

Inactive BAX exists in two states. A shift in the equilibrium would initiate apoptosis.
in/out Isomerism of cyclophanes: a theoretical account of 2,6,15-trithia-[34,10][7]metacyclophane and [34,10][7]metacyclophane as well as their halogen substituted analogues
Authors: Vujović Milena , Zlatar Matija , Milčić Miloš , Gruden Maja
Published: March 2017

What are the effects responsible for cyclophane isomer stability?
Electronic properties of reduced molybdenum oxides
Authors: Inzani K. , Nematollahi M. , Vullum-Bruer F. , Grande T. , Reenaas T. W. , Selbach S. M.
Published: March 2017

A combined theoretical and experimental study of the electronic properties of reduced molybdenum oxides with stoichiometries ranging from MoO3 to MoO2.
Theoretical investigation of proton collisions on prebiotic candidates: hydrogen cyanide polymers
Authors: Bacchus-Montabonel Marie-Christine
Published: March 2017

Proton-induced charge transfer on HCN polymers. Charge transfer efficiency exhausted compared to cyclic biomolecules (nucleobases, sugars, cyclic prebiotic compounds).
A global coupled cluster potential energy surface for HCl + OH ↔ Cl + H2O
Authors: Zuo Junxiang , Zhao Bin , Guo Hua , Xie Daiqian
Published: March 2017

A new and more accurate full-dimensional global potential energy surface (PES) for the ground electronic state of the ClH2O system is developed by using the permutation invariant polynomial-neural network (PIP-NN) method to fit 15 777 points obtained using an explicitly correlated unrestricted coupled-cluster method with single, double, and perturbative triple excitations (UCCSD(T)-F12b).
One-step synthesis, electronic structure, and photocatalytic activity of earth-abundant visible-light-driven FeAl2O4
Authors: Mu Hui-Ying , Li Fa-Tang , An Xing-Tao , Liu Rui-Hong , Li Yi-Lei , Qian Xin , Hu Yong-Qi
Published: March 2017

An inexpensive FeAl2O4photocatalyst is developedviaone-step synthesis and its electronic structure is given for the first time.
Phosphorescent platinum(ii) alkynyls end-capped with benzothiazole units
Authors: Lara Rebeca , Lalinde Elena , Moreno M. Teresa
Published: March 2017

Phosphorescent platinum(ii) alkynyls. Phosphorescenttrans-bis(alkynyl) bis(phosphine) or bis(cyanide) PtIIderivatives (1–4) based on the 2-phenylbenzothiazole unit have been prepared. The negative solvatochromic behavior of4has been analyzed by the Kamlet–Taft solvent scale and the Gutmann's acceptor numbers. The optical properties were addressed by TD and DFT calculations on2and4.
New polyaminocarboxylate macrocycles containing phenolate binding units: synthesis, luminescent and relaxometric properties of their lanthanide complexes
Authors: Enel Morgane , Leygue Nadine , Balayssac Stéphane , Laurent Sophie , Galaup Chantal , Vander Elst Luce , Picard Claude
Published: March 2017

The relaxometric and (or) luminescent properties in aqueous solutions of new LnIIImacrocyclic complexes derived from PCTA are reported.
Developing new platform chemicals: what is required for a new bio-based molecule to become a platform chemical in the bioeconomy?
Authors: Bomtempo José-Vitor , Chaves Alves Flavia , de Almeida Oroski Fabio
Published: March 2017

This paper proposes a framework with six dimensions that can be useful for evaluating the potential and the current stage of a bio-based platform chemical. The framework considers the technological and strategic challenges to be fulfilled by a company that intends to lead a platform based on a bio-based chemical. A platform chemical should be an intermediate molecule, with a structure able to generate a number of derivatives, that is produced at a competitive cost, capable of allowing exploitation of the scale and scope economies, and inserted within a complete innovation ecosystem that is able to create value with governance mechanisms that are capable of allowing coordination of the innovation process and facilitation of the value capture by the focal company leading the platform, in our case the producer of the platform molecule. Based on these six dimensions, three potential platform chemicals – succinic acid, butanol and farnesene – are compared and discussed. It is possible to identify important differences concerning the technological dimensions and the strategic dimensions as well. Two of the molecules – farnesene and succinic acid – adhere to most of the conditions required to structure a platform chemical. However, the innovation ecosystem is not complete and the governance mechanisms are still under development, so it is not clear if they will be capable of allowing a favorable position for value capture by the platform leader. Butanol structuring for a platform does not seem promising. The potential of the molecule is apparently not high and the strategic initiatives are in general not focused on innovation ecosystem structuring.
Use of near infrared spectroscopy for the rapid low-cost analysis of waste papers and cardboards
Authors: Hayes D. J. M. , Hayes M. H. B. , Leahy J. J.
Published: March 2017

Analytical data and quantitative near infrared (NIR) spectroscopy models for various lignocellulosic components (including Klason lignin and the constituent sugars glucose, xylose, mannose, arabinose, galactose, and rhamnose), ash, and ethanol-soluble extractives were obtained for 53 samples of paper and cardboard. These samples were mostly the type of materials typically found in domestic wastes (e.g. newspapers, printing paper, glossy papers, food packaging). A number of the samples (48) were obtained by separating a sample, after milling, into two particle size fractions. It was found that the fractions containing the smaller particles typically had higher ash and Klason lignin contents and lower glucose and xylose contents than the larger particle size fractions. Nevertheless, all of the sample types had attractive total sugars contents (>50%), indicating that these could be suitable feedstocks for the production of biofuels and chemicals in hydrolysis-based biorefining technologies. NIR models of a high predictive accuracy (R2 of >0.9 for the independent validation set) were obtained for total sugars, glucose, xylose, Klason lignin, and ash, with values for the Root Mean Square Error of Prediction (RMSEP) of 2.36%, 2.64%, 0.56%, 1.98%, and 4.87%, respectively. Good NIR models (R2 of >0.8) were also obtained for mannose, arabinose, and galactose. These results suggest that NIR spectroscopy is a suitable method for the rapid, low-cost, analysis of the major lignocellulosic components of waste paper/cardboard samples.
Photo-assisted water oxidation by high-nuclearity cobalt-oxo cores: tracing the catalyst fate during oxygen evolution turnover
Authors: Natali M. , Bazzan I. , Goberna-Ferrón S. , Al-Oweini R. , Ibrahim M. , Bassil B. S. , Dau H. , Scandola F. , Galán-Mascarós J. R. , Kortz U. , Sartorel A. , Zaharieva I. , Bonchio M.
Published: March 2017

Cobalt-oxo cores with Co>9 enable oxygen evolution under visible light with diffusional electron transfer and 32 ET events in 60 ms.
Metal-free catalytic conversion of CO2 and glycerol to glycerol carbonate
Authors: Su Xinluona , Lin Weiwei , Cheng Haiyang , Zhang Chao , Wang Ying , Yu Xiujuan , Wu Zhijian , Zhao Fengyu
Published: March 2017

The synthesis of glycerol carbonate directly from CO2 and glycerol was promoted by 2-cyanopyridine in the absence of any metal catalyst.
Stereochemical investigations of the Tetrahymena cyclase, a model system for euphane/tirucallane biosynthesis
Authors: Giner José-Luis , Feng Ju
Published: March 2017

The squalene cyclase of Tetrahymena pyriformis cyclizes 2,3-dihydrosqualene to euph-7-ene; after truncation of the substrate, “tirucall-7-enes” are formed.
Mussel-inspired post-heparinization of a stretchable hollow hydrogel tube and its potential application as an artificial blood vessel
Authors: Deng Jie , Cheng Chong , Teng Yingying , Nie Chuanxiong , Zhao Changsheng
Published: March 2017

We report the fabrication and post-functionalization of a highly stretchable hydrogel tube and its potential application as an artificial blood vessel.
Tunable assembly and disassembly of responsive supramolecular polymer brushes
Authors: Gao Zhiliang , Chen Mengjun , Hu Yuanyuan , Dong Shuli , Cui Jiwei , Hao Jingcheng
Published: March 2017

Tunable assembly and disassembly of stimuli-responsive supramolecular polymer brushes are induced by using host–guest interactions between β-cyclodextrin and azobenzene groups.
A hierarchically structured PtCo nanoflakes–nanotube as an electrocatalyst for methanol oxidation
Authors: Yu Dongbo , Shamsaei Ezzatollah , Yao Jianfeng , Xu Tongwen , Wang Huanting
Published: March 2017

A novel PtCo nanoflake–nanotube architecture was prepared through a galvanic replacement approach. Due to the unique structure, it exhibited excellent electrocatalytic performances for methanol oxidation.
Predicted structural evolution and detailed insight into configuration correlation, mechanical properties of silicon–boron binary compounds
Authors: Zhang Bo , Wu Lailei , Li Zhihong
Published: March 2017

Low energy structures for SiB6 and SiB36 are proposed; the Si–B/Si–Si/B–B covalent interaction is responsible for the mechanical properties of the Si–B binaries.
Rheology of nitrile rubber with hybrid crosslinked network composed of covalent bonding and hydrogen bonding
Authors: Shangguan Yonggang , Yang Jie , Zheng Qiang
Published: March 2017

A hybrid crosslinked network composed of covalent bonding and non-covalent bonding was constructed in nitrile rubber (NBR) by using a compound crosslinking agents dicumyl peroxide (DCP) and N,N-methylenebis acrylamide (MBA).
Phase diagram, stability and electronic properties of an Fe–P system under high pressure: a first principles study
Authors: Zhao Ziyuan , Liu Lulu , Zhang Shoutao , Yu Tong , Li Fei , Yang Guochun
Published: March 2017

The phase diagram and relative stabilities of Fe–P binary compounds are reliably determined at pressures of up to 400 GPa.
From bench scale to kilolab production of renewable ferulic acid-based bisphenols: optimisation and evaluation of different purification approaches towards technical feasibility and process environmental sustainability
Authors: Teixeira A. R. S. , Willig G. , Couvreur J. , Flourat A. L. , Peru A. A. M. , Ferchaud P. , Ducatel H. , Allais F.
Published: March 2017

Scaling-up a process is not always trivial. Technical synthetic feasibility, yield and environmental impact must be assessed.
Electrostatically driven resonance energy transfer in “cationic” biocompatible indium phosphide quantum dots
Authors: Devatha Gayathri , Roy Soumendu , Rao Anish , Mallick Abhik , Basu Sudipta , Pillai Pramod P.
Published: March 2017

InP QDs join the family of cationic nanoparticles as a practical alternative to toxic metal ion based QDs for biological applications.
Shining a light on transition metal chalcogenides for sustainable photovoltaics
Authors: Matthews Peter D. , McNaughter Paul D. , Lewis David J. , O'Brien Paul
Published: March 2017

Transition metal chalcogenides are an important family of materials that have received significant interest in recent years as they have the potential for diverse applications ranging from use in electronics to industrial lubricants.
Ultrathin VO2 nanosheets self-assembled into 3D micro/nano-structured hierarchical porous sponge-like micro-bundles for long-life and high-rate Li-ion batteries
Authors: Liu Pengcheng , Xu Yuan , Zhu Kongjun , Bian Kan , Wang Jing , Sun Xu , Gao Yanfeng , Luo Hongjie , Lu Li , Liu Jinsong
Published: March 2017

Novel 3D micro/nano-structured hierarchical porous sponge-like micro-bundles self-assembled from ultrathin VO2 (B)@C nanosheets were controllably synthesized.
Facile synthesis of N-doped porous carbon encapsulated bimetallic PdCo as a highly active and durable electrocatalyst for oxygen reduction and ethanol oxidation
Authors: Zhang Zheye , Liu Shasha , Tian Xin , Wang Juan , Xu Pei , Xiao Fei , Wang Shuai
Published: March 2017

A facile synthesis of ultrafine PdCo bimetallic nanoparticles confined in N-doped porous carbon nanocapsules (PdCo@NPNCs) is presented here. The PdCo@NPNCs exhibit superior electrocatalytic activity and stability towards both the oxygen reduction and ethanol oxidation reactions.
Microporous cokes formed in zeolite catalysts enable efficient solar evaporation
Authors: Wang Jianjian , Liu Zhaohui , Dong Xinglong , Hsiung Chia-En , Zhu Yihan , Liu Lingmei , Han Yu
Published: March 2017

Zeolite-derived cokes are used as absorbers for solar evaporation and the influences of their porous structures and compositions on energy conversion efficiency are studied.
Nitrogen-doped truncated carbon nanotubes inserted into nitrogen-doped graphene nanosheets with a sandwich structure: a highly efficient metal-free catalyst for the HER
Authors: Li Shuwen , Yu Zhounan , Yang Yuanyuan , Liu Yang , Zou Hai , Yang Honglei , Jin Jun , Ma Jiantai
Published: March 2017

A highly efficient and robust metal-free catalyst (N-TCNT@NGS), with a sandwich structure of 1D nitrogen-doped truncated carbon nanotubes inserted between 2D nitrogen-doped graphene nanosheets, was synthesized by a facile and green hydrothermal method.
Fine-crystallized LDHs prepared with SiO2 spheres as highly active solid base catalysts
Authors: Shirotori Mahiro , Nishimura Shun , Ebitani Kohki
Published: March 2017

Fine-crystallized layered double hydroxides are prepared via the co-precipitation method with the coexistence of SiO2 spheres (SiO2@LDH), and their base catalysis and structural properties are investigated.
Uni-directional liquid spreading control on a bio-inspired surface from the peristome of Nepenthes alata
Authors: Chen Huawei , Zhang Liwen , Zhang Yi , Zhang Pengfei , Zhang Deyuan , Jiang Lei
Published: March 2017

Uni-directional liquid spreading surface structures inspired by the Nepenthes alata peristome and the control of the surface wettability and structural features were investigated.
A visible-light-excited Eu3+complex-based luminescent probe for highly sensitive time-gated luminescence imaging detection of intracellular peroxynitrite
Authors: Wu Jing , Yang Yuzhu , Zhang Lin , Wang Huan , Yang Mei , Yuan Jingli
Published: March 2017

A visible-light-excited europium complex was developed for highly sensitive imaging of intracellular peroxynitrite with time-gated luminescence mode.
Modelling and numerical approximation for the nonconservative bitemperature Euler model
Authors: Aregba–Driollet D. , Breil J. , Brull S. , Dubroca B. , Estibals E.
Published: March 2017

This paper is devoted to the study of the nonconservative bitemperature Euler system. We firstly introduce an underlying two species kinetic model coupled with the Poisson equation. The bitemperature Euler system is then established from this kinetic model according to an hydrodynamic limit. A dissipative entropy is proved to exist and a solution is defined to be admissible if it satisfies the related dissipation property. Next, four different numerical methods are presented. Firstly, the kinetic model gives rise to kinetic schemes for the fluid system. The second approach belongs to the family of the discrete BGK schemes introduced by Aregba–Driollet and Natalini. Finally, a quasi-linear relaxation approach and a Lagrange-remap scheme are considered.
Cold snare polypectomy for non-pedunculated colon polyps greater than 1 cm
Authors: Piraka Cyrus , Saeed Ahmed , Waljee Akbar , Pillai Ajish , Stidham Ryan , Elmunzer B.
Published: March 2017

Background and study aims Colonic polyps > 1 cm in size are commonly managed using hot polypectomy techniques. The most frequent adverse events (delayed bleeding, post-polypectomy syndrome, and perforation) are related to electrocautery-induced injury. We hypothesized that cold resection of large polyps may have similar efficacy and improved safety compared to hot polypectomy. Our aims were to evaluate efficacy and safety of piecemeal cold snare resection of colonic polyps > 1 cm.

Patients and methods Patients undergoing lift and piecemeal cold snare polypectomy of non-pedunculated colon polyps > 1 cm from October 2013 to September 2015 were identified retrospectively. Efficacy was defined by the absence of residual adenomatous tissue at endoscopic follow-up. Adverse events (AEs), including post-procedural bleeding, bowel perforation, or post-procedural pain requiring hospitalization were assessed by chart review and telephone follow-up. 

Results Seventy-three patients underwent piecemeal cold snare polypectomy for 94 colon polyps > 1 cm with 56 of 73 patients completing follow-up on 72 polyps. Residual or recurrent adenoma was found in 7 cases (9.7 %). Median polyp size was significantly greater in those with residual/recurrent adenoma (37.1 vs. 19.1 mm, P < .0001). There were no AEs among all 73 patients enrolled.

Conclusions Piecemeal cold snare resection of colon polyps > 1 cm is feasible, safe and efficacious when compared to published hot polypectomy data. Additional observational and randomized comparative effectiveness studies are necessary to demonstrate comparable adenoma eradication and improved safety advantage over existing hot snare polypectomy techniques.
Inhibitory Effects of Garcinia cambogia Extract on CYP2B6 Enzyme Activity
Authors: Yu Jun , Choi Min , Park Jong , Rehman Shaheed , Nakamura Katsunori , Yoo Hye
Published: March 2017

This study assessed the inhibitory effects of Garcinia cambogia extract on the cytochrome P450 enzymes in vitro. G. cambogia extract was incubated with cytochrome P450 isozyme-specific substrates in human liver microsomes and recombinant CYP2B6 isozyme, and the formation of the marker metabolites was measured to investigate the inhibitory potential on cytochrome P450 enzyme activities. The results showed that G. cambogia extract has significant inhibitory effects on CYP2B6 activity in a concentration-dependent manner. Furthermore, the inhibition was potentiated following preincubation with NADPH, indicating that G. cambogia extract is a time-dependent inhibitor of CYP2B6. Meanwhile, hydroxycitric acid, the major bioactive ingredient of G. cambogia extract, did not exhibit significant inhibition effects on cytochrome P450 enzyme activities. G. cambogia extract could modulate the pharmacokinetics of CYP2B6 substrate drugs and lead to interactions with those drugs. Therefore, caution may be required with respect to concomitant intake of dietary supplements containing G. cambogia extract with CYP2B6 substrates.
The cage effect in systems of hard spheres
Authors: van Megen W. , Schöpe H. J.
Published: March 2017

The cage effect is generally invoked when discussing the delay in the decay of time correlation functions of dense fluids. In an attempt to examine the role of caging more closely, we consider the spread of the displacement distributions of Brownian particles. These distributions are necessarily biased by the presence of neighbouring particles. Accommodation of this bias by those neighbours conserves the displacement distribution locally and presents a collective mechanism for exploring configuration space that is more efficient than the intrinsic Brownian motion. Caging of some particles incurs, through the impost of global conservation of the displacement distribution, a delayed, non-local collective process. This non-locality compromises the efficiency with which configuration space is explored. Both collective mechanisms incur delay or stretching of time correlation functions, in particular the particle number and flux densities. This paper identifies and distinguishes these mechanisms in existing data from experiments and computer simulations on systems of particles with hard sphere interactions.
Boosting Wigner’s nj-symbols
Authors: Speziale Simone
Published: March 2017

We study the SL(2,ℂ) Clebsch-Gordan coefficients appearing in the Lorentzian EPRL spin foam amplitudes for loop quantum gravity. We show how the amplitudes decompose into SU(2) nj− symbols at the vertices and integrals over boosts at the edges. The integrals define edge amplitudes that can be evaluated analytically using and adapting results in the literature, leading to a pure state sum model formulation. This procedure introduces virtual representations which, in a manner reminiscent of virtual momenta in Feynman amplitudes, are off-shell of the simplicity constraints present in the theory, but with the integrands that peak at the on-shell values. We point out some properties of the edge amplitudes which are helpful for numerical and analytical evaluations of spin foam amplitudes, and suggest among other things a simpler model useful for calculations of certain lowest order amplitudes. As an application, we estimate the large spin scaling behaviour of the simpler model, on a closed foam with all 4-valent edges and Euler characteristic χ, to be Nχ−5E+V/2. The paper contains a review and an extension of the results on SL(2,ℂ) Clebsch-Gordan coefficients among unitary representations of the principal series that can be useful beyond their application to quantum gravity considered here.
Stability analysis of the rimming flow inside a uniformly heated rotating horizontal cylinder
Authors: Kumawat Tara Chand , Tiwari Naveen
Published: March 2017

The stability analysis is presented for a thin viscous liquid film flowing inside a uniformly heated horizontal cylinder that is rotating about its axis. The free surface evolution equation for the liquid-gas interface is obtained by simplifying the Navier-Stokes and energy equations within the lubrication approximation. Various dimensionless numbers are obtained that quantify the effect of gravity, viscous drag, inertia, surface tension, and thermocapillary stress. The film thickness evolution equation is solved numerically to obtain two-dimensional, steady state solutions neglecting axial variations. A liquid pool forms at the bottom of the cylinder when gravity dominates other forces. This liquid pool is shifted in the direction of rotation when inertia or viscous drag is increased. Small axial perturbations are then imposed to the steady solutions to study their stability behavior. It is found that the inertia and capillary pressure destabilize whereas the gravity and thermocapillary stress stabilize the rimming flow. The influence of Marangoni number is reported by computing the stable and unstable parametric regions. Thicker films are shown to be more susceptible to become unstable.
The Cartan algorithm in five dimensions
Authors: McNutt D. D. , Coley A. A. , Forget A.
Published: March 2017

In this paper, we introduce an algorithm to determine the equivalence of five dimensional spacetimes, which generalizes the Karlhede algorithm for four dimensional general relativity. As an alternative to the Petrov type classification, we employ the alignment classification to algebraically classify the Weyl tensor. To illustrate the algorithm, we discuss three examples: the singly rotating Myers-Perry solution, the Kerr (Anti-) de Sitter solution, and the rotating black ring solution. We briefly discuss some applications of the Cartan algorithm in five dimensions.
Caesium hydride: MS-CASPT2 potential energy curves and A1Σ+→X1Σ+ absorption/emission spectroscopy
Authors: Škoviera Ján , Neogrády Pavel , Louis Florent , Pitoňák Michal , Černušák Ivan
Published: March 2017

Correlated ab initio methods (CASPT2 and CCSD(T)) in conjunction with the ANO-RCC basis sets were used to calculate potential energy curves (PECs) of the ground, valence, and Rydberg electronic states of CsH with the inclusion of the scalar relativistic effects. The spectroscopic constants of bound states were calculated from the PECs and compared with previous theoretical and/or available experimental data. Absorption and emission spectra arising from the transition between X1Σ+ and A1Σ+ states were modelled using vibrational and rotational energy levels and corresponding nuclear wave functions obtained via the direct numerical integration of one-dimensional rovibrational Schrödinger equation in the CASPT2/ANO-RCC electronic potentials. The anharmonic shape of the A1Σ+ potential and the shape of the pertinent vibrational wave functions have an interesting impact on the final shape of the spectrum and result in the complicated fine structure of individual emission bands.
Time-resolved observation of interatomic excitation-energy transfer in argon dimers
Authors: Mizuno Tomoya , Cörlin Philipp , Miteva Tsveta , Gokhberg Kirill , Kuleff Alexander , Cederbaum Lorenz S. , Pfeifer Thomas , Fischer Andreas , Moshammer Robert
Published: March 2017

The ultrafast transfer of excitation energy from one atom to its neighbor is observed in singly charged argon dimers in a time-resolved extreme ultraviolet (XUV)-pump IR-probe experiment. In the pump step, bound 3s-hole states in the dimer are populated by single XUV-photon ionization. The excitation-energy transfer at avoided crossings of the potential-energy curves leads to dissociation of the dimer, which is experimentally observed by further ionization with a time-delayed IR-probe pulse. From the measured pump-probe delay-dependent kinetic-energy release of coincident Ar+ + Ar+ ions, we conclude that the transfer of energy occurs on a time scale of about 800fs. This mechanism represents a fast relaxation process below the energy threshold for interatomic Coulombic decay.
Resonance fluorescence of a site-controlled quantum dot realized by the buried-stressor growth technique
Authors: Strauß Max , Kaganskiy Arsenty , Voigt Robert , Schnauber Peter , Schulze Jan-Hindrik , Rodt Sven , Strittmatter André , Reitzenstein Stephan
Published: March 2017

Site-controlled growth of semiconductor quantum dots (QDs) represents a major advancement to achieve scalable quantum technology platforms. One immediate benefit is the deterministic integration of quantum emitters into optical microcavities. However, site-controlled growth of QDs is usually achieved at the cost of reduced optical quality. Here, we show that the buried-stressor growth technique enables the realization of high-quality site-controlled QDs with attractive optical and quantum optical properties. This is evidenced by performing excitation power dependent resonance fluorescence experiments at cryogenic temperatures showing QD emission linewidths down to 10 μeV. Resonant excitation leads to the observation of the Mollow triplet under CW excitation and enables coherent state preparation under pulsed excitation. Under resonant π-pulse excitation we observe clean single-photon emission associated with g(2)(0) = 0.12 limited by non-ideal laser suppression.
Ultra-low magnetic damping of perovskite La0.7Sr0.3MnO3 thin films
Authors: Qin Qing , He Shikun , Song Wendong , Yang Ping , Wu Qingyun , Feng Yuan Ping , Chen Jingsheng
Published: March 2017

The perovskite La0.7Sr0.3MnO3 (LSMO) films grown on different substrates were investigated by an angle resolved broadband ferromagnetic resonance technique. All films exhibited a four-fold magnetocrystalline anisotropy, which is in accord with the crystal structure. Moreover, a perpendicular uniaxial anisotropy changed from the (001)pc easy plane to the [001]pc easy direction when the strain of LSMO films varies from tensile to compressive. The ultra-low magnetic damping constant of 5.2 × 10−4 was obtained for a 44.6 nm LSMO film on an NdGaO3 (110) substrate. The breathing Fermi surface model in which the damping constant is proportional to the density of states at Fermi energy is the dominant mechanism for the intrinsic magnetic relaxation.
Tuning InP self-assembled quantum structures to telecom wavelength: A versatile original InP(As) nanostructure “workshop”
Authors: Mura E. E. , Gocalinska A. , Juska G. , Moroni S. T. , Pescaglini A. , Pelucchi E.
Published: March 2017

The influence of hydride exposure on previously unreported self-assembled InP(As) nanostructures is investigated, showing an unexpected morphological variability with growth parameters, and producing a large family of InP(As) nanostructures by metalorganic vapour phase epitaxy, from dome and ring-like structures to double dot in a ring ensembles. Moreover, preliminary microphotoluminescence data are indicating the capped rings system as an interesting candidate for single quantum emitters at telecom wavelengths, potentially becoming a possible alternative to InAs QDs for quantum technology and telecom applications.
Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy
Authors: Sato T. , Koswattage K. R. , Nakayama Y. , Ishii H.
Published: March 2017

Although the contact electrification of insulating polymers has been widely used in various technologies, the mechanism of electrification is still not well understood and several models have been proposed to explain the mechanism. Some of the models assume the existence of bandgap states that can store or release electrons to charge the polymer; however, the density of states in the bandgap region is not well examined. In this study, an approach to directly measure the density of state of insulating polymers using hν-dependent high-sensitivity ultraviolet photoemission spectroscopy is proposed. Demonstration of the approach to a representative insulating polymer, nylon-6,6, is reported with the estimation of the charge density and charge penetration depth as a function of the work function difference.
Magnetic field configurations on thruster performance in accordance with ion beam characteristics in cylindrical Hall thruster plasmas
Authors: Kim Holak , Choe Wonho , Lim Youbong , Lee Seunghun , Park Sanghoo
Published: March 2017

Magnetic field configuration is critical in Hall thrusters for achieving high performance, particularly in thrust, specific impulse, efficiency, etc. Ion beam features are also significantly influenced by magnetic field configurations. In two typical magnetic field configurations (i.e., co-current and counter-current configurations) of a cylindrical Hall thruster, ion beam characteristics are compared in relation to multiply charged ions. Our study shows that the co-current configuration brings about high ion current (or low electron current), high ionization rate, and small plume angle that lead to high thruster performance.
Modulation of electronic and optical properties in mixed halide perovskites CsPbCl3xBr3(1-x) and CsPbBr3xI3(1-x)
Authors: Zhou Ziqi , Cui Yu , Deng Hui-Xiong , Huang Le , Wei Zhongming , Li Jingbo
Published: March 2017

The recent discovery of lead halide perovskites with band gaps in the visible presents important potential in the design of high efficient solar cells. CsPbCl3, CsPbBr3 and CsPbI3 are stable compounds within this new family of semiconductors. By performing the first-principles calculation, we explore the structural, electronic and optical properties of CsPbCl3xBr3(1–x) and CsPbBr3xI3(1–x) with various compositions of halide atoms. Structural stability is demonstrated with halide atoms distributing randomly at the halide atomic sites. CsPbCl3xBr3(1–x) and CsPbBr3xI3(1–x) exhibit the modulation of their band gaps by varying the halide composition. Our results also indicate that CsPbCl3xBr3(1–x) and CsPbBr3xI3(1–x) with different halide compositions are suitable to application to solar cells for the general features are well preserved. Good absorption to lights of different wavelengths has been obtained in these mixed halide perovskites.
Large-scale dieback of mangroves in Australia
Authors: Duke Norman C. , Kovacs John M. , Griffiths Anthony D. , Preece Luke , Hill Duncan J. E. , van Oosterzee Penny , Mackenzie Jock , Morning Hailey S. , Burrows Damien
Published: March 2017

This study records and documents the most severe and notable instance ever reported of sudden and widespread dieback of mangrove vegetation. Between late 2015 and early 2016, extensive areas of mangrove tidal wetland vegetation died back along 1000km of the shoreline of Australia’s remote Gulf of Carpentaria. The cause is not fully explained, but the timing was coincident with an extreme weather event; notably one of high temperatures and low precipitation lacking storm winds. The dieback was severe and widespread, affecting more than 7400ha or 6% of mangrove vegetation in the affected area from Roper River estuary in the Northern Territory, east to Karumba in Queensland. At the time, there was an unusually lengthy period of severe drought conditions, unprecedented high temperatures and a temporary drop in sea level. Although consequential moisture stress appears to have contributed to the cause, this occurrence was further coincidental with heat-stressed coral bleaching. This article describes the effect and diagnostic features of this severe dieback event in the Gulf, and considers potential causal factors.