bluuebunny/crossref_metadata_2025 huggingface dataset:
High Confidence Fission Yeast SUMO Conjugates Identified by Tandem Denaturing Affinity Purification
Authors: Nie Minghua , Vashisht Ajay A. , Wohlschlegel James A. , Boddy Michael N.
Published: September 2015

Covalent attachment of the small ubiquitin-like modifier (SUMO) to key targets in the proteome critically regulates the evolutionarily conserved processes of cell cycle control, transcription, DNA replication and maintenance of genome stability. The proteome-wide identification of SUMO conjugates in budding yeast has been invaluable in helping to define roles of SUMO in these processes. Like budding yeast, fission yeast is an important and popular model organism; however, the fission yeast Schizosaccharomyces pombe community currently lacks proteome-wide knowledge of SUMO pathway targets. To begin to address this deficiency, we adapted and used a highly stringent Tandem Denaturing Affinity Purification (TDAP) method, coupled with mass spectrometry, to identify fission yeast SUMO conjugates. Comparison of our data with that compiled in budding yeast reveals conservation of SUMO target enrichment in nuclear and chromatin-associated processes. Moreover, the SUMO “cloud” phenomenon, whereby multiple components of a single protein complex are SUMOylated, is also conserved. Overall, SUMO TDAP provides both a key resource of high confidence SUMO-modified target proteins in fission yeast and a robust method for future analyses of SUMO function.
Modulation of the optical transmittance in monolayer graphene oxide by using external electric field
Authors: Qiao Zhixing , Qin Chengbing , Gao Yan , Zhang Guofeng , Chen Ruiyun , Xiao Liantuan , Jia Suotang
Published: September 2015

Graphene oxide (GO) emerges as a functional material in optoelectronic devices due to its broad spectrum response and abundant optical properties. In this article, it is demonstrated that the change of optical transmittance amplitude for monolayer GO (mGO) could be up to 24.8% by an external electric field. The frequency harmonics for transmittance spectra are analyzed by use of Fast Fourier Transforms to give an insight into the modulation mechanism. Two physical models, the electrical permittivity and the sheet conductivity which linearly vary as the electric field, are proposed to response for the transmittance modulation. The model-based simulations agree reasonable well with the experimental results.
Latitudinal variation of leaf stomatal traits from species to community level in forests: linkage with ecosystem productivity
Authors: Wang Ruili , Yu Guirui , He Nianpeng , Wang Qiufeng , Zhao Ning , Xu Zhiwei , Ge Jianping
Published: September 2015

To explore the latitudinal variation of stomatal traits from species to community level and their linkage with net primary productivity (NPP), we investigated leaf stomatal density (SDL) and stomatal length (SLL) across 760 species from nine forest ecosystems in eastern China and calculated the community-level SD (SDC) and SL (SLC) through species-specific leaf area index (LAI). Our results showed that latitudinal variation in species-level SDL and SLL was minimal, but community-level SDC and SLC decreased clearly with increasing latitude. The relationship between SD and SL was negative across species and different plant functional types (PFTs), but positive at the community level. Furthermore, community-level SDC correlated positively with forest NPP and explained 51% of the variation in NPP. These findings indicate that the trade-off by regulating SDL and SLL may be an important strategy for plant individuals to adapt to environmental changes and temperature acts as the main factor influencing community-level stomatal traits through alteration of species composition. Importantly, our findings provide new insight into the relationship between plant traits and ecosystem function.
Properties of Transmission and Leaky Modes in a Plasmonic Waveguide Constructed by Periodic Subwavelength Metallic Hollow Blocks
Authors: Jei Wu Jin , Jang Wu Chien , Qi Shen Jian , Hou Da Jun , Chen Lo Wen
Published: September 2015

Based on the concept of low-frequency spoof surface plasmon polaritons (spoof SPPs), a kind of leaky mode is proposed in a waveguide made of a subwavelength metal-block array with open slots. Numerical results reveal that a new transmission mode is found in the periodic subwavelength metal open blocks. This modal field is located inside the interior of a hollow block compared with that in a solid metal block array. The dispersion curve shows that such a new SPPs mode has a negative slope, crossing the light line and then going into a zone of leaky mode at higher frequencies. The leaky mode has a wider frequency bandwidth and this can lead to a radiation scanning angle of 53° together with high radiation efficiency. Based on the individual characteristics exhibited by a frequency-dependent radiation pattern for the present leaky mode, the waveguide structure can have potential applications such as frequency dividers and demultiplexers. Experimental verification of such a leaky mode at microwave has been performed and the experimental results are found to be consistent with the theoretical analysis.
Enhancement of Chiroptical Signals by Circular Differential Mie Scattering of Nanoparticles
Authors: Yoo SeokJae , Park Q-Han
Published: September 2015

We enhance the weak optical signals of small chiral molecules via circular differential Mie scattering (CDMS) of nanoparticles immersed in them. CDMS is the preferential Mie scattering of left- and right-handed circularly polarized light by nanoparticles whose sizes are about the same as the wavelength of light. Solving the Mie scattering theory for chiral media, we find that the CDMS signal of the particle is linearly proportional to the chirality parameter κ of the molecules. This linear amplitude enhancement by CDMS of the particle holds, even for large particles, which have a retardation effect. We also demonstrate that the CDMS of a nanoparticle is sensitive to changes of molecular concentration and that the nanoparticle can be utilized as a chiroptical biosensor detecting the concentration of analyte. We expect that the enhancement of molecular chiroptical signals by CDMS will pave the way for novel chiroptical spectroscopy using nanostructures.
Auxenochlorella protothecoides and Prototheca wickerhamii plastid genome sequences give insight into the origins of non-photosynthetic algae
Authors: Yan Dong , Wang Yun , Murakami Tatsuya , Shen Yue , Gong Jianhui , Jiang Huifeng , Smith David R. , Pombert Jean-Francois , Dai Junbiao , Wu Qingyu
Published: September 2015

The forfeiting of photosynthetic capabilities has occurred independently many times throughout eukaryotic evolution. But almost all non-photosynthetic plants and algae still retain a colorless plastid and an associated genome, which performs fundamental processes apart from photosynthesis. Unfortunately, little is known about the forces leading to photosynthetic loss; this is largely because there is a lack of data from transitional species. Here, we compare the plastid genomes of two “transitional” green algae: the photosynthetic, mixotrophicAuxenochlorella protothecoidesand the non-photosynthetic, obligate heterotrophPrototheca wickerhamii. Remarkably, the plastid genome ofA. protothecoidesis only slightly larger than that ofP. wickerhamii, making it among the smallest plastid genomes yet observed from photosynthetic green algae. Even more surprising, both algae have almost identical plastid genomic architectures and gene compositions (with the exception of genes involved in photosynthesis), implying that they are closely related. This close relationship was further supported by phylogenetic and substitution rate analyses, which suggest that the lineages giving rise toA. protothecoidesandP. wickerhamiidiverged from one another around six million years ago.
The heptad repeat region is a major selection target in MERS-CoV and related coronaviruses
Authors: Forni Diego , Filippi Giulia , Cagliani Rachele , De Gioia Luca , Pozzoli Uberto , Al-Daghri Nasser , Clerici Mario , Sironi Manuela
Published: September 2015

Middle East respiratory syndrome coronavirus (MERS-CoV) originated in bats and spread to humans via zoonotic transmission from camels. We analyzed the evolution of the spike (S) gene in betacoronaviruses (betaCoVs) isolated from different mammals, in bat coronavirus populations, as well as in MERS-CoV strains from the current outbreak. Results indicated several positively selected sites located in the region comprising the two heptad repeats (HR1 and HR2) and their linker. Two sites (R652 and V1060) were positively selected in the betaCoVs phylogeny and correspond to mutations associated with expanded host range in other coronaviruses. During the most recent evolution of MERS-CoV, adaptive mutations in the HR1 (Q/R/H1020) arose in camels or in a previous host and spread to humans. We determined that different residues at position 1020 establish distinct inter- and intra-helical interactions and affect the stability of the six-helix bundle formed by the HRs. A similar effect on stability was observed for a nearby mutation (T1015N) that increases MERS-CoV infection efficiency in vitro. Data herein indicate that the heptad repeat region was a major target of adaptive evolution in MERS-CoV-related viruses; these results are relevant for the design of fusion inhibitor peptides with antiviral function.
Optofluidic analysis system for amplification-free, direct detection of Ebola infection
Authors: Cai H. , Parks J. W. , Wall T. A. , Stott M. A. , Stambaugh A. , Alfson K. , Griffiths A. , Mathies R. A. , Carrion R. , Patterson J. L. , Hawkins A. R. , Schmidt H.
Published: September 2015

The massive outbreak of highly lethal Ebola hemorrhagic fever in West Africa illustrates the urgent need for diagnostic instruments that can identify and quantify infections rapidly, accurately and with low complexity. Here, we report on-chip sample preparation, amplification-free detection and quantification of Ebola virus on clinical samples using hybrid optofluidic integration. Sample preparation and target preconcentration are implemented on a PDMS-based microfluidic chip (automaton), followed by single nucleic acid fluorescence detection in liquid-core optical waveguides on a silicon chip in under ten minutes. We demonstrate excellent specificity, a limit of detection of 0.2 pfu/mL and a dynamic range of thirteen orders of magnitude, far outperforming other amplification-free methods. This chip-scale approach and reduced complexity compared to gold standard RT-PCR methods is ideal for portable instruments that can provide immediate diagnosis and continued monitoring of infectious diseases at the point-of-care.
Molecular portraits revealing the heterogeneity of breast tumor subtypes defined using immunohistochemistry markers
Authors: Dai Xiaofeng , Li Yang , Bai Zhonghu , Tang Xu-Qing
Published: September 2015

Breast cancer is highly heterogeneous. The subtypes defined using immunohistochemistry markers and gene expression profilings (GEP) are related but not equivalent, with inter-connections under investigated. Our previous study revealed a set of differentially expressed genes (diff-genes), containing 1015 mRNAs and 69 miRNAs, which characterize the immunohistochemistry-defined breast tumor subtypes at the GEP level. However, they may convey redundant information due to the large amount of genes included. By reducing the dimension of the diff-genes, we identified 119 mRNAs and 20 miRNAs best explaining breast tumor heterogeneity with the most succinct number of genes found using hierarchical clustering and nearest-to-center principle. The final signature panel contains 119 mRNAs, whose superiority over diff-genes was replicated in two independent public datasets. The comparison of our signature with two pioneering signatures, the Sorlie’s signature and PAM50, suggests a novel marker, FOXA1, in breast cancer classification. Subtype-specific feature genes are reported to characterize each immunohistochemistry-defined subgroup. Pathway and network analysis reveal the critical roles of Notch signalings in [ER+|PR+]HER2− and cell cycle in [ER+|PR+]HER2+ tumors. Our study reveals the primary differences among the four immunohistochemistry-defined breast tumors at the mRNA and miRNA levels and proposes a novel signature for breast tumor subtyping given GEP data.
Many Atolls May be Uninhabitable Within Decades Due to Climate Change
Authors: Storlazzi Curt D. , Elias Edwin P.L. , Berkowitz Paul
Published: September 2015

Observations show global sea level is rising due to climate change, with the highest rates in the tropical Pacific Ocean where many of the world’s low-lying atolls are located. Sea-level rise is particularly critical for low-lying carbonate reef-lined atoll islands; these islands have limited land and water available for human habitation, water and food sources and ecosystems that are vulnerable to inundation from sea-level rise. Here we demonstrate that sea-level rise will result in larger waves and higher wave-driven water levels along atoll islands’ shorelines than at present. Numerical model results reveal waves will synergistically interact with sea-level rise, causing twice as much land forecast to be flooded for a given value of sea-level rise than currently predicted by current models that do not take wave-driven water levels into account. Atolls with islands close to the shallow reef crest are more likely to be subjected to greater wave-induced run-up and flooding due to sea-level rise than those with deeper reef crests farther from the islands’ shorelines. It appears that many atoll islands will be flooded annually, salinizing the limited freshwater resources and thus likely forcing inhabitants to abandon their islands in decades, not centuries, as previously thought.
Coordinated vigilance provides evidence for direct reciprocity in coral reef fishes
Authors: Brandl Simon J. , Bellwood David R.
Published: September 2015

Reciprocity is frequently assumed to require complex cognitive abilities. Therefore, it has been argued that reciprocity may be restricted to animals that can meet these demands. Here, we provide evidence for the potential presence of direct reciprocity in teleost fishes. We demonstrate that in pairs of coral reef rabbitfishes (f. Siganidae), one fish frequently assumes an upright vigilance position in the water column, while the partner forages in small crevices in the reef substratum. Both behaviours are strongly coordinated and partners regularly alternate their positions, resulting in a balanced distribution of foraging activity. Compared to solitary individuals, fishes in pairs exhibit longer vigilance bouts, suggesting that the help provided to the partner is costly. In turn, fishes in pairs take more consecutive bites and penetrate deeper into crevices than solitary individuals, suggesting that the safety provided by a vigilant partner may outweigh initial costs by increasing foraging efficiency. Thus, the described system appears to meet all of the requirements for direct reciprocity. We argue that the nature of rabbitfish pairs provides favourable conditions for the establishment of direct reciprocity, as continuous interaction with the same partner, simultaneous needs, interdependence and communication relax the cognitive demands of reciprocal cooperation.
Molecular “light switch” [Ru(phen)2dppzidzo]2+monitoring the aggregation of tau
Authors: Gao Xing , Wang Li , Huang Hai-Liang , Wang Lin-Lin , Yao Jun-Liang , Shi Shuo , Yao Tian-Ming
Published: September 2015

The luminescence of [Ru(phen)2dppzidzo]2+has a linear response to the amounts of tau filaments. It may have a possible binding mode as depicted in the right diagram.
Metallic modified (bismuth, antimony, tin and combinations thereof) film carbon electrodes
Authors: Foster Christopher W. , de Souza Ana P. , Metters Jonathan P. , Bertotti Mauro , Banks Craig E.
Published: September 2015

We question the utilisation ofin situmetallic modified electrodes towards the detection of lead(ii) and cadmium(ii) showing that comparable electroanalytical responses are achieved at the bare/unmodified counterparts.
Novel left-handed double-helical chiral carbon nanotubes for electrochemical biosensing study
Authors: Ren Shuang , Wang Huan , Zhang Yufan , Guo Liping , Zhang Hongyi , Shi Zhihong , Sun Yuena , Li Mingjie , Li Meng , Huang Zheng
Published: September 2015

The preparation and electrochemical biosensing application of novel left-handed double-helical chiral carbon nanotubes.
The synthesis and structure of a carbene-stabilized iminocarboranyl-boron(i) compound
Authors: Wang Hao , Zhang Jiji , Lin Zhenyang , Xie Zuowei
Published: September 2015

A carbene stabilized iminocarboranylboron(i) compound has been isolated and structurally characterized by the reduction of iminocarboranyl dibromoborane with KC8 in the presence of an NHC, in which the imine moiety serves as both a σ donor and a π acceptor.
Direct electron transfer from photosystem II to hematite in a hybrid photoelectrochemical cell
Authors: Wang Wangyin , Wang Zhiliang , Zhu Qingjun , Han Guangye , Ding Chunmei , Chen Jun , Shen Jian-Ren , Li Can
Published: September 2015

A hybrid photoanode integrating photosystem II with a hematite film is constructed for photoelectrochemical water oxidation.
Exploring water as building bricks in enzyme engineering
Authors: Hendil-Forssell Peter , Martinelle Mats , Syrén Per-Olof
Published: September 2015

A de novo designed water pattern is used to achieve a 34-fold accelerated promiscuous enzyme catalysis by efficient transition state stabilization.
Charge control of the inverse trans-influence
Authors: La Pierre Henry S. , Rosenzweig Michael , Kosog Boris , Hauser Christina , Heinemann Frank W. , Liddle Stephen T. , Meyer Karsten
Published: September 2015

The relative charge localization on the multiply bonded ligand (O2− or TMSN2−) governs the ground state stabilization derived from the inverse trans-influence (ITI) in U(vi) complexes of the [((RArO)3tacn)UL]+ system with metal-ligand multiple bonding (MLMB).
Self-selecting homochiral quadruple-stranded helicates and control of supramolecular chirality
Authors: Boer Stephanie A. , Turner David R.
Published: September 2015

Enantiomeric cages have supramolecular chirality induced by the chemical chirality of the ligands. Diastereomeric ligands or achiral ligands yields analogous centrosymmetric complexes.
Selective carbon dioxide adsorption by mixed-ligand porous coordination polymers
Authors: Bhattacharya Biswajit , Ghoshal Debajyoti
Published: September 2015

Mixed ligand metal–organic frameworks (MOFs) have resolutely established themselves as a class of excellent solid state sorbents for carbon dioxide (CO2) and a proper design of such MOF can potentially improve not only the amount of CO2 adsorption, but also the selectivity of CO2 uptake over other gases and volatiles.
Two robust metal–organic frameworks with uncoordinated N atoms for CO2adsorption
Authors: Ren Guo-Jian , Liu Yan-Qing , Hu Tong-Liang , Bu Xian-He
Published: September 2015

Two highly porous metal–organic frameworks are successfully constructed through the assembling of Co/Ni ions and mixed ligands. From the contribution of the uncoordinated tetrazolate N atoms of the ligand the two complexes show high CO2adsorption capacities, serving as potential CO2adsorption materials.
Transition from ZIF-L-Co to ZIF-67: a new insight into the structural evolution of zeolitic imidazolate frameworks (ZIFs) in aqueous systems
Authors: Zhang Jingcheng , Zhang Tianci , Yu Dongbo , Xiao Kesong , Hong Yu
Published: September 2015

A leaf-like ZIF-L-Co is synthesized for the first time and the molar ratio of Hmim/Co plays an important role in the synthesis. ZIF-L-Co is a transient phase at the initial stage of ZIF-67 crystal growth. The crystallization process of ZIF-67 from ZIF-L-Co follows a solid transformation mechanism.
Structural, morphological and optical investigation of β-Ag2MoO4 microcrystals obtained with different polar solvents
Authors: Cunha F. S. , Sczancoski J. C. , Nogueira I. C. , de Oliveira V. G. , Lustosa S. M. C. , Longo E. , Cavalcante L. S.
Published: September 2015

In this work, rietveld refinement, morphology and optical properties of β-Ag2MoO4 microcrystals were synthesized by the precipitation method using different polar solvents: water, methanol, ethanol, 1-propanol and 1-butanol.
Structures and relative stabilities of ammonia clusters at different temperatures: DFT vs. ab initio
Authors: Malloum Alhadji , Fifen Jean Jules , Dhaouadi Zoubeida , Engo Serge Guy Nana , Jaidane Nejm-Eddine
Published: September 2015

The global minimum energy structures of (NH3)n=2–10are pointed out for the first time at a given temperature.
Laser-induced electron localization in H2+: mixed quantum-classical dynamics based on the exact time-dependent potential energy surface
Authors: Suzuki Yasumitsu , Abedi Ali , Maitra Neepa T. , Gross E. K. U.
Published: September 2015

The exact nuclear time-dependent potential energy surface for laser-induced electron localization is studied with a view to developing a mixed quantum-classical dynamics method for strong-field processes.
Bulk heterojunction organic solar cells fabricated by oblique angle deposition
Authors: Zhu Lin , Zhao Tianjiao , Li Kan , Sun Wentao , Xing Yingjie
Published: September 2015

Phase segregation occurs in obliquely deposited bulk heterojunction layers.
Fluorographane: a promising material for bipolar doping of MoS2
Authors: Çakır Deniz , Peeters Francois M.
Published: September 2015

Using first principles calculations we show that one can realize vanishing n-type/p-type Schottky barrier heights when contacting MoS2 to fluorographane.
Analysis of local molecular motions of aromatic sidechains in proteins by 2D and 3D fast MAS NMR spectroscopy and quantum mechanical calculations
Authors: Paluch Piotr , Pawlak Tomasz , Jeziorna Agata , Trébosc Julien , Hou Guangjin , Vega Alexander J. , Amoureux Jean-Paul , Dracinsky Martin , Polenova Tatyana , Potrzebowski Marek J.
Published: September 2015

We report a new NMR methodology, which provides detailed probe of molecular motions occurring on timescales of nano- to microseconds, in sidechains of proteins.
Mechanical properties of monolayer sulphides: a comparative study between MoS2, HfS2 and TiS3
Authors: Kang Jun , Sahin Hasan , Peeters François M.
Published: September 2015

The in-plane stiffness (C), Poisson's ratio (ν), Young's modulus and ultimate strength (σ) along two different crystallographic orientations are calculated for the single layer crystals: MoS2, HfS2 and TiS3 in 1H, 1T and monoclinic phases.
The use of the Rx spin label in orientation measurement on proteins, by EPR
Authors: Stevens M. A. , McKay J. E. , Robinson J. L. S. , EL Mkami H. , Smith G. M. , Norman D. G.
Published: September 2015

Alternative labeling sites using the ‘rigid’ Rx spin label on protein secondary structures are explored and high field orientation measurements are made.
Origin of photogenerated carrier recombination at the metal–active layer interface in polymer solar cells
Authors: Kumar Mukesh , Dubey Ashish , Reza Khan Mamun , Adhikari Nirmal , Qiao Qiquan , Bommisetty Venkat
Published: September 2015

This article sheds some light on the origin of photogenerated carrier recombination at the metal–active layer interface in bulk heterojunction solar cells.
Chemical trends in the optical properties of rocksalt nanoparticles
Authors: Wobbe Milena C. C. , Zwijnenburg Martijn A.
Published: September 2015

The nature and magnitude of the optical gaps of rocksalt alkaline earth (MgO, CaO, SrO, MgS, MgSe) and transition metal chalcogenide (CdO, PbS) nanoparticles are studied using time-dependent density functional theory calculations.
Attenuating microwave radiation by absorption through controlled nanoparticle localization in PC/PVDF blends
Authors: Biswas Sourav , Kar Goutam Prasanna , Bose Suryasarathi
Published: September 2015

Nanoscale ordering in a polymer blend structure is indispensable to obtain materials with tailored properties.
A diminutive modification in arylamine electron donors: synthesis, photophysics and solvatochromic analysis – towards the understanding of dye sensitized solar cell performances
Authors: Srinivasan Venkatesan , Panneer Murugesan , Jaccob Madhavan , Pavithra Nagaraj , Anandan Sambandam , Kathiravan Arunkumar
Published: September 2015

An electron rich donor moiety plays an important role in dye sensitized solar cells (DSCs).
Ru/N-AC catalyst to produce vinyl chloride from acetylene and 1,2-dichloroethane
Authors: Zhao Wei , Li Wei , Zhang Jinli
Published: September 2015

N and Ru species in the Ru/N-AC catalyst can adsorb and activate EDC and acetylene, respectively, generating a synergistic effect.
Efficient aqueous hydrogenation of levulinic acid to γ-valerolactone over a highly active and stable ruthenium catalyst
Authors: Tan Jingjing , Cui Jinglei , Ding Guoqiang , Deng Tiansheng , Zhu Yulei , Li Yong-wang
Published: September 2015

Efficient aqueous hydrogenation of levulinic acid to γ-valerolactone over a highly active and stable immobilized ruthenium catalyst with a GVL yield of 99.1 mol% at 25 °C.
Methanol steam reforming catalysts derived by reduction of perovskite-type oxides LaCo1−x−yPdxZnyO3±δ
Authors: Kuc Jagoda , Neumann Matthias , Armbrüster Marc , Yoon Songhak , Zhang Yucheng , Erni Rolf , Weidenkaff Anke , Matam Santhosh Kumar
Published: September 2015

Pd–Zn nanoparticles are synthesized by reduction of LaCo1−x−yPdxZnyO3±δ for methanol steam reforming and they can be reintegrated into the perovskite crystal on reoxidation.
Photo Lewis acid generators: photorelease of B(C6F5)3 and applications to catalysis
Authors: Khalimon Andrey Y. , Shaw Bryan K. , Marwitz Adam J. V. , Piers Warren E. , Blackwell James M. , Parvez Masood
Published: September 2015

A series of molecules capable of releasing of the strong organometallic Lewis acid B(C6F5)3 upon exposure to 254 nm light have been developed.
Reactions of [Cu(X)(BPEP-Ph)] (X = PF6, SbF6) with silyl compounds. Cooperative bond activation involving non-coordinating anions
Authors: Nakajima Yumiko , Tsuchimoto Takahiro , Chang Yung-Hung , Takeuchi Katsuhiko , Ozawa Fumiyuki
Published: September 2015

Bond activation of silyl compounds, assisted by the cooperative action of non-coordinating anions, is achieved using Cu(i) complexes coordinated with a PNP-pincer type phosphaalkene ligand, [Cu(X)(BPEP-Ph)] (X = PF6, SbF6).
Gel-assisted crystallization of [Ir4(IMe)7(CO)H10]2+ and [Ir4(IMe)8H9]3+ clusters derived from catalytic glycerol dehydrogenation
Authors: Sharninghausen Liam S. , Mercado Brandon Q. , Crabtree Robert H. , Balcells David , Campos Jesús
Published: September 2015

Two unique Ir4 clusters isolated during catalytic glycerol dehydrogenation, crystallized using aqueous and organic gel matrices and displaying remarkable structural features are described.
What do you do, titanium? Insight into the role of titanium oxide as a water oxidation promoter in hematite-based photoanodes
Authors: Monllor-Satoca Damián , Bärtsch Mario , Fàbrega Cristian , Genç Aziz , Reinhard Sandra , Andreu Teresa , Arbiol Jordi , Niederberger Markus , Morante Joan Ramon
Published: September 2015

Titanium improves water oxidation yields over hematite photoanodes, tailoring its surface state density (kinetics) and hematite-pseudobrookite heterojunctions (energetics).
Photoelectrochemical water splitting
Authors: Miller E. L.
Published: September 2015

The authors in this collection offer comprehensive and definitive summaries of important topics in photoelectrochemical hydrogen production.
Coupling single quantum dots to plasmonic nanocones: optical properties
Authors: Meixner Alfred J. , Jäger Regina , Jäger Sebastian , Bräuer Annika , Scherzinger Kerstin , Fulmes Julia , Krockhaus Sven zur Oven , Gollmer Dominik A. , Kern Dieter P. , Fleischer Monika
Published: September 2015

Coupling a single quantum emitter, such as a fluorescent molecule or a quantum dot (QD), to a plasmonic nanostructure is an important issue in nano-optics and nano-spectroscopy, relevant for a wide range of applications, including tip-enhanced near-field optical microscopy, plasmon enhanced molecular sensing and spectroscopy, and nanophotonic amplifiers or nanolasers, to mention only a few. While the field enhancement of a sharp nanoantenna increasing the excitation rate of a very closely positioned single molecule or QD has been well investigated, the detailed physical mechanisms involved in the emission of a photon from such a system are, by far, less investigated. In one of our ongoing research projects, we try to address these issues by constructing and spectroscopically analysing geometrically simple hybrid heterostructures consisting of sharp gold cones with single quantum dots attached to the very tip apex. An important goal of this work is to tune the longitudinal plasmon resonance by adjusting the cones' geometry to the emission maximum of the core–shell CdSe/ZnS QDs at nominally 650 nm. Luminescence spectra of the bare cones, pure QDs and hybrid systems were distinguished successfully. In the next steps we will further investigate, experimentally and theoretically, the optical properties of the coupled systems in more detail, such as the fluorescence spectra, blinking statistics, and the current results on the fluorescence lifetimes, and compare them with uncoupled QDs to obtain a clearer picture of the radiative and non-radiative processes.
Carboxymethyl-lysine: thirty years of investigation in the field of AGE formation
Authors: Delgado-Andrade Cristina
Published: September 2015

In 1985 carboxymethyl-lysine (CML), the first glycoxidation product, was discovered by Dr Ahmed while trying to identify the major products formed in reactions of glucose with lysine under physiological conditions.
Phosphorus-containing polymers from THPS. VII. Synthesis of phosphorus-containing trialkynes and their metal-free 1,3-dipolar cycloaddition reaction with azidated soybean-oil
Authors: Guo Gang , Sun Jian , Zhao Chen , Liu Yun , Liu Cheng-Mei
Published: September 2015

A novel hydrolysis-resistant trialkyne, namely tris(prop-2-yn-1-yloxy methyl)phosphane oxide (TPOPO), was prepared from an environmentally friendly tetrakis(hydroxymethyl)phosphonium sulfate (THPS).
Exploring the formation routes of diatomic hydrogenated radicals using femtosecond laser-induced breakdown spectroscopy of deuterated molecular solids
Authors: Serrano Jorge , Moros Javier , Laserna J. Javier
Published: September 2015

In recent years, laser-induced breakdown spectroscopy (LIBS) has expanded beyond multielemental analysis capability by exploring molecular solids and optical emissions from diatomic radicals.
Kilo-scale droplet generation in three-dimensional monolithic elastomer device (3D MED)
Authors: Jeong Heon-Ho , Yelleswarapu Venkata R. , Yadavali Sagar , Issadore David , Lee Daeyeon
Published: September 2015

Three dimensional monolithic elastomer device (3D MED) for kilo-scale droplet generation (1.5 L per hour) is developed using a double-sided imprinting technique.
Research highlights: microfluidic-enabled single-cell epigenetics
Authors: Dhar Manjima , Khojah Reem , Tay Andy , Di Carlo Dino
Published: September 2015

Barcoded droplet-based mRNA sequencing from thousands of single cells – Exploring regulatory differences in single cells with fluidics-controlled ATAC-seq – Towards single-cell chromatin immunoprecipitation.
A systematic approach to prioritize drug targets using machine learning, a molecular descriptor-based classification model, and high-throughput screening of plant derived molecules: a case study in oral cancer
Authors: Randhawa Vinay , Kumar Singh Anil , Acharya Vishal
Published: September 2015

Network-based and cheminformatics approaches identify novel lead molecules forCXCR4, a key gene prioritized in oral cancer.
Interaction mechanism exploration of R-bicalutamide/S-1 with WT/W741L AR using molecular dynamics simulations
Authors: Liu Hongli , An Xiaoli , Li Shuyan , Wang Yuwei , Li Jiazhong , Liu Huanxiang
Published: September 2015

R-Bicalutamide is a first generation antiandrogen used to treat prostate cancer, which inhibits androgen action by competitively binding to the androgen receptor (AR).
A mode of action study of cationic anthraquinone analogs: a new class of highly potent anticancer agents
Authors: Shrestha Jaya P. , Subedi Yagya Prasad , Chen Liaohai , Chang Cheng-Wei Tom
Published: September 2015

Previously, we reported the synthesis and structure–activity relationship (SAR) study of a series of novel 4,9-dioxo-4,9-dihydro-1H-naphtho[2,3-d][1,2,3]triazol-3-ium salts, which had very potent anti-proliferative activities (low μM to nM GI50) against a broad range of cancer cells.
Physical property exploration of highly oriented V2O5 thin films prepared by electron beam evaporation
Authors: Thiagarajan Shrividhya , Thaiyan Mahalingam , Ganesan Ravi
Published: September 2015

Highly crystalline α-V2O5 thin film nanostructures with a single phase exhibiting higher mobility were prepared by the EB-PVD technique.
Expeditious synthesis of functionalized tricyclic 4-spiro pyrano[2,3-c]pyrazoles in aqueous medium using dodecylbenzenesulphonic acid as a Brønsted acid–surfactant-combined catalyst
Authors: Mukherjee Prasun , Paul Sanjay , Das Asish R.
Published: September 2015

An eco-friendly multicomponent strategy has been developed to access a single tricyclic molecular scaffold possessing pyran, pyrazole and spiro functionalities.
The N-silylation of sulfoximines
Authors: Peng Haibo , Yu Jin-Tao , Bao Weijie , Xu Jinwei , Cheng Jiang
Published: September 2015

The copper-catalyzed N-silylation of sulfoximines was achieved in good to moderate yields in the presence of di-tert-butyl peroxide.
Effect of the solvent on improving the recognition properties of surface molecularly imprinted polymers for precise separation of erythromycin
Authors: Zhang Yuxin , Qu Xue , Wang FeiFei , Wu Gang , Li Jinyang , Hong Hua , Liu Changsheng
Published: September 2015

The results of 13C-NMR and isothermal titration calorimetry indicate that adding of NH3·H2O is able to prevent the electrostatic interaction between MAA and ERY-A and consequently prevent nonspecific adsorption and achieve higher specificity.
Impact of storage conditions and storage time on silver nanoparticles' physicochemical properties and implications for their biological effects
Authors: Izak-Nau E. , Huk A. , Reidy B. , Uggerud H. , Vadset M. , Eiden S. , Voetz M. , Himly M. , Duschl A. , Dusinska M. , Lynch I.
Published: September 2015

A multi-parametric assessment of the impact of storage time/conditions and capping agent charge on the stability and toxicity of AgNPs showed agglomeration, dissolution, oxidation, capping agent degradation and attachment of Ag+ions all play a role.
Combined experimental and theoretical insight into the drug delivery of nanoporous metal–organic frameworks
Authors: Wang Jiaping , Jin Juncheng , Li Fumei , Li Baohong , Liu Jianqiang , Jin Jie , Wang Chunfeng , Zeng Yongping , Wang Yukun
Published: September 2015

The comparison between calculated drug load values and some molecular level properties indicates the existence of a relationship between the void space of material and drug load capacity.
Biochemical and histological changes in the liver and gills of Nile tilapia Oreochromis niloticus exposed to Red 195 dye
Authors: Ayadi Insaf , Monteiro Sandra Mariza , Regaya Imed , Coimbra Ana , Fernandes Fontainhas , Oliveira Maria Manuel , Peixoto Francisco , Mnif Wissem
Published: September 2015

The present study investigates the biochemical and morphological responses induced in the liver and gills of Nile tilapiaOreochromis niloticusby exposure to various Red 195 dye concentrations (0.05, 0.1 and 0.2 mg L−1) for various durations (7, 14 and 21 days).
An investigation on the key features of a D–π–A type novel chalcone derivative for opto-electronic applications
Authors: Shkir Mohd. , Muhammad Shabbir , AlFaify Salem , Irfan Ahmad , Patil Parutagouda Shankaragouda , Arora Manju , Algarni Hamed , Jingping Zhang
Published: September 2015

The calculated UV-visible optical spectra at different levels of theory.
A green method to increase yield and quality of bio-oil: ultrasonic pretreatment of biomass and catalytic upgrading of bio-oil over metal (Cu, Fe and/or Zn)/γ-Al2O3
Authors: Karnjanakom Surachai , Guan Guoqing , Asep Bayu , Du Xiao , Hao Xiaogang , Yang Jingxuan , Samart Chanatip , Abudula Abuliti
Published: September 2015

A green method is developed to increase the yield and quality of bio-oil by ultrasonic pretreatment of biomass followed by in situ catalytic upgrading of bio-oil over metal (Cu, Fe and/or Zn)/γ-Al2O3.
Formation potential of N-nitrosamines from soluble microbial products (SMPs) exposed to chlorine, chloramine and ozone
Authors: Zhang Beibei , Xian Qiming , Yang Gang , Gong Tingting , Li Aimin , Feng Jianfang
Published: September 2015

Soluble microbial products (SMPs) are an important component of effluent organic matter in wastewater treatment.
Ammonia removal from water using sodium hydroxide modified zeolite mordenite
Authors: Soetardji Jennifer Pieter , Claudia Jeannete Cindy , Ju Yi-Hsu , Hriljac Joseph A. , Chen Tzu-Yu , Soetaredjo Felycia Edi , Santoso Shella Permatasari , Kurniawan Alfin , Ismadji Suryadi
Published: September 2015

Natural and modified mordenite zeolites were used to remove ammonium ions from aqueous solution and Koi pond water.
Coplanar homojunction a-InGaZnO thin film transistor fabricated using ultraviolet irradiation
Authors: Kim M.-M. , Kim M.-H. , Ryu S.-m. , Lim J. H. , Choi D.-K.
Published: September 2015

A novel technique for formation of thermally-stable IGZO homojunction with highly conductivity by UV light irradiation.
Fully screen printed highly conductive electrodes on various flexible substrates for asymmetric supercapacitors
Authors: Wang Siliang , Liu Nishuang , Yang Congxing , Liu Weijie , Su Jun , Li Luying , Yang Changping , Gao Yihua
Published: September 2015

MWCNTs–MnO2 anodes and MWCNTs–MoO3 cathodes were screen printed on carbon nanoparticle flexible electrodes for supercapacitor applications.
Investigating spin reversal and other anomalies in magnetic, transport and specific heat measurements of NdFeO3 and NdFe0.5Ni0.5O3 ortho-perovskites
Authors: Mir Sajad A. , Ikram M. , Asokan K.
Published: September 2015

Specific heat versus temperature. Lower inset: zero-field data with the fitting result. Upper inset: specific heat versus temperature at different magnetic fields near a Schottky anomaly in (a) NFO and (b) NFNO.
A [two-step/one week] synthesis of C-functionalized homocyclens and cyclams. Application to the preparation of conjugable BCAs without chelating properties alteration
Authors: Camus Nathalie , Halime Zakaria , le Bris Nathalie , Bernard Hélène , Beyler Maryline , Platas-Iglesias Carlos , Tripier Raphaël
Published: September 2015

An efficient synthesis ofC-functionalized azamacrocycles is presented together with a coordination study showing the week influence of the added appended group.
Largely enhanced piezoelectric and luminescent properties of Er doped BST ceramics
Authors: Li Wei , Xu Zhijun , Chu Ruiqing , Wu Zhihua , Hao Jigong , Fu Peng , Du Juan , Yue Zhenxing
Published: September 2015

Multifunctional Ba1−xTi0.96Sn0.04O3 + x mol% Er (BST-Er) ceramics were prepared using a solid state reaction method.
Swimming in a crystal
Authors: Brown Aidan T. , Vladescu Ioana D. , Dawson Angela , Vissers Teun , Schwarz-Linek Jana , Lintuvuori Juho S. , Poon Wilson C. K.
Published: September 2015

Colloidal crystals induce orbital motion in self-propelled Janus particles, and destroy orbital motion in E. coli bacteria.
Configurable lipid membrane gradients quantify diffusion, phase separations and binding densities
Authors: Liu Katherine N. , Hung Chen-min S. , Swift Michael A. , Muñoz Kristen A. , Cortez Jose L. , Sanii Babak
Published: September 2015

Tunable collisions between spreading phospholipid membranes form functional gradients.
Demonstration of a phonon-glass electron-crystal strategy in (Hf,Zr)NiSn half-Heusler thermoelectric materials by alloying
Authors: Liu Yintu , Xie Hanhui , Fu Chenguang , Snyder G. Jeffrey , Zhao Xinbing , Zhu Tiejun
Published: September 2015

The atomic disorder of Zr/Hf sites in (Hf,Zr)NiSn alloys effectively reduces lattice thermal conductivity and has a negligible effect on electron transport, demonstrating an effective phonon-glass electron-crystal strategy.
Rapid and discriminative detection of nitro aromatic compounds with high sensitivity using two zinc MOFs synthesized through a temperature-modulated method
Authors: Wan Xiu-Yan , Jiang Fei-Long , Liu Cai-Ping , Zhou Kang , Chen Lian , Gai Yan-Li , Yang Yan , Hong Mao-Chun
Published: September 2015

Two 3D fluorescent Zn-MOFs solvothermally synthesized by a temperature-modulated method exhibit rapid and discriminative detection of nitro aromatic compounds with high sensitivity.
A simple melamine-assisted exfoliation of polymeric graphitic carbon nitrides for highly efficient hydrogen production from water under visible light
Authors: Ma Longtao , Fan Huiqing , Li Mengmeng , Tian Hailin , Fang Jiawen , Dong Guangzhi
Published: September 2015

Compared to the bulk-CN, the quasi-2D-CN possesses a unique electronic structure, enlarged bandgap, prolonged lifetime, increased surface area and enhanced electronic transport, and exhibits highly efficient hydrogen production from water under visible light.
Aerosol assisted chemical vapour deposition of transparent conductive ZnO thin films with hexagonal microplate surfaces and ultrahigh haze values
Authors: Chen Shuqun , McLachlan Martyn , Sapelkin Andrei , Binions Russell
Published: September 2015

Aerosol assisted chemical vapour deposition has been used to fabricate transparent conductive ZnO thin films with highly hexagonal, textured surfaces and ultra high haze on silica glass substrates.
Extremely high-rate capacity and stable cycling of a highly ordered nanostructured carbon–FeF2 battery cathode
Authors: Song Huawei , Cui Hao , Wang Chengxin
Published: September 2015

High rate and long-term cycling stability were simultaneously realized in a porous FeF2@CMK-3 cathode by forming a three dimensional electron- and ion-conductive framework.
Fullerene-free organic photovoltaics based on unconventional material combination: a molecular donor and polymeric acceptors
Authors: Geng Yanfang , Xiao Bo , Izawa Seiichiro , Huang Jianming , Tajima Keisuke , Zeng Qingdao , Zhou Erjun
Published: September 2015

Photovoltaic cells based on molecular donor/polymeric acceptors were investigated and 3.01% PCE was achieved by using DIO as an additive.
Thermoelectric properties of Te-doped ternary CuAgSe compounds
Authors: Qiu P. F. , Wang X. B. , Zhang T. S. , Shi X. , Chen L. D.
Published: September 2015

Te dopants at Se-sites exert little influence on the band structure of β-CuAgSe as compared with the off-stoichiometry.
Bubble-template-assisted synthesis of hollow fullerene-like MoS2 nanocages as a lithium ion battery anode material
Authors: Zuo Xiaoxia , Chang Kun , Zhao Jing , Xie Zhengzheng , Tang Hongwei , Li Bao , Chang Zhaorong
Published: September 2015

MoS2 nanocage anodes synthesized by a bubble-template-assisted method can provide a large expandable area to stabilize the electrode structure during cycling.
Surface coatings with covalently attached caspofungin are effective in eliminating fungal pathogens
Authors: Coad Bryan R. , Lamont-Friedrich Stephanie J. , Gwynne Lauren , Jasieniak Marek , Griesser Stefani S. , Traven Ana , Peleg Anton Y. , Griesser Hans J.
Published: September 2015

In this work we have prepared surface coatings formulated with the antifungal drug caspofungin, an approved pharmaceutical lipopeptide compound of the echinocandin drug class.
Single component thermo-gelling electroactive hydrogels from poly(caprolactone)–poly(ethylene glycol)–poly(caprolactone)-graft-aniline tetramer amphiphilic copolymers
Authors: Zhao Xin , Guo Baolin , Ma Peter X.
Published: September 2015

Single component injectable degradable conductive hydrogels with excellent biocompatibility based on poly(caprolactone)–poly(ethylene glycol)–poly(caprolactone) and aniline tetramer were prepared via a thermo-gelling approach.
Regulation of the breast cancer stem cell phenotype by hypoxia-inducible factors
Authors: Semenza Gregg L.
Published: September 2015

The small subpopulation of breast cancer cells that possess the capability for self-renewal and formation of secondary tumours that recapitulate the heterogeneity of the primary tumour are referred to as tumour-initiating cells or BCSCs (breast cancer stem cells). The hypoxic tumour microenvironment and chemotherapy actively induce the BCSC phenotype. HIFs (hypoxia-inducible factors) are required and molecular mechanisms by which they promote the BCSC phenotype have recently been delineated. HIF inhibitors block chemotherapy-induced enrichment of BCSCs, suggesting that their use may improve the response to chemotherapy and increase the survival of breast cancer patients.
Fluorescence lifetime estimation method for incomplete decay
Authors: Yu Hongqi , Day‐Uei Li David
Published: September 2015

A new incomplete decay signal model is proposed to describe the incomplete decay effects in a time‐correlated single‐photon counting based fluorescence lifetime imaging microscopy system. On the basis of this model, a MUltiple SIgnal Classification algorithm to correctly estimate fluorescence lifetimes even in the presence of incomplete decay effects is modified. Monte Carlo simulations were carried out to demonstrate the performances of the proposed approach, and the results show that the proposed method is insensitive to the laser pulse rate and has a larger lifetime dynamic range compared with previously reported approaches. To the authors’ knowledge, it is the first non‐fitting method that can resolve all lifetime components individually of a multi‐exponential decay suffering from incomplete decay effects.
Improving the power efficiency of enhanced unipolar OFDM for optical wireless communication
Authors: Dang Jian , Zhang Zaichen , Wu Liang
Published: September 2015

Enhanced unipolar orthogonal frequency division multiplexing (eU‐OFDM) is a novel unipolar multicarrier modulation scheme used in intensity modulation and direct detection systems for optical wireless communication. It improves the spectral efficiency of unipolar OFDM at the expense of lower power efficiency. A novel symbol detection method exploiting the intrinsic signal structure of the received signal is proposed. Analysis and simulations show that the power efficiency of eU‐OFDM could be improved up to 3 dB in the high signal‐to‐noise ratio regime using the proposed method.
Qubit state estimation and enhancement by quantum thermal noise
Authors: Chapeau‐Blondeau F.
Published: September 2015

From a qubit in a noisy state affected by an uncontrolled decohering environment represented by a thermal bath at temperature T, estimation of the norm of its Bloch vector is considered, equivalent to estimation of its purity or of its linear entropy. The performance in estimation is assessed by the quantum Fisher information. When the qubit can be prepared with an optimal orientation precisely matched to the thermal noise, the estimation performance always degrades with an increasing temperature of the bath. On the contrary, for a non‐optimal orientation of the qubit, the possibility of an enhancement of the estimation performance with an increasing temperature of the bath is demonstrated. Such behaviour shows that increased decoherence is not necessarily associated with poorer informational performance, and can be compared with stochastic resonance or useful noise effects previously reported in classical (non‐quantum) estimation.