bluuebunny/crossref_metadata_2025 huggingface dataset:
From Soybean residue to advanced supercapacitors
Authors: Ferrero G. A. , Fuertes A. B. , Sevilla M.
Published: November 2015

Supercapacitor technology is an extremely timely area of research with fierce international competition to develop cost-effective, environmentally friendlier EC electrode materials that have real world application. Herein, nitrogen-doped carbons with large specific surface area, optimized micropore structure and surface chemistry have been prepared by means of an environmentally sound hydrothermal carbonization process using defatted soybean (i.e., Soybean meal), a widely available and cost-effective protein-rich biomass, as precursor followed by a chemical activation step. When tested as supercapacitor electrodes in aqueous electrolytes (i.e. H2SO4 and Li2SO4), they demonstrate excellent capacitive performance and robustness, with high values of specific capacitance in both gravimetric (250–260 and 176 F g−1 in H2SO4 and Li2SO4 respectively) and volumetric (150–210 and 102 F cm−3 in H2SO4 and Li2SO4 respectively) units and remarkable rate capability (>60% capacitance retention at 20 A g−1 in both media). Interestingly, when Li2SO4 is used, the voltage window is extended up to 1.7 V (in contrast to 1.1 V in H2SO4). Thus, the amount of energy stored is increased by 50% compared to H2SO4 electrolyte, enabling this environmentally sound Li2SO4-based supercapacitor to deliver ~12 Wh kg−1 at a high power density of ~2 kW kg−1.
Analysis of the Secretome of Apoptotic Peripheral Blood Mononuclear Cells: Impact of Released Proteins and Exosomes for Tissue Regeneration
Authors: Beer Lucian , Zimmermann Matthias , Mitterbauer Andreas , Ellinger Adolf , Gruber Florian , Narzt Marie-Sophie , Zellner Maria , Gyöngyösi Mariann , Madlener Sibylle , Simader Elisabeth , Gabriel Christian , Mildner Michael , Ankersmit Hendrik Jan
Published: November 2015

We previously showed that, when peripheral blood mononuclear cells (PBMCs) were stressed with ionizing radiation, they released paracrine factors that showed regenerative capacity in vitro and in vivo. This study aimed to characterize the secretome of PBMCs and to investigate its biologically active components in vitro and vivo. Bioinformatics analysis revealed that irradiated PBMCs differentially expressed genes that encoded secreted proteins. These genes were primarily involved in (a) pro-angiogenic and regenerative pathways and (b) the generation of oxidized phospholipids with known pro-angiogenic and inflammation-modulating properties. Subsequently, in vitro assays showed that the exosome and protein fractions of irradiated and non-irradiated PBMC secretome were the major biological components that enhanced cell mobility; conversely, secreted lipids and microparticles had no effects. We tested a viral-cleared PBMC secretome, prepared according to good manufacturing practice (GMP), in a porcine model of closed chest, acute myocardial infarction. We found that the potency for preventing ventricular remodeling was similar with the GMP-compliant and experimentally-prepared PBMC secretomes. Our results indicate that irradiation modulates the release of proteins, lipid-mediators and extracellular vesicles from human PBMCs. In addition our findings implicate the use of secretome fractions as valuable material for the development of cell-free therapies in regenerative medicine.
Enhancing the Liquid-Phase Exfoliation of Graphene in Organic Solvents upon Addition of n-Octylbenzene
Authors: Haar Sébastien , El Gemayel Mirella , Shin Yuyoung , Melinte Georgian , Squillaci Marco A. , Ersen Ovidiu , Casiraghi Cinzia , Ciesielski Artur , Samorì Paolo
Published: November 2015

Due to a unique combination of electrical and thermal conductivity, mechanical stiffness, strength and elasticity, graphene became a rising star on the horizon of materials science. This two-dimensional material has found applications in many areas of science ranging from electronics to composites. Making use of different approaches, unfunctionalized and non-oxidized graphene sheets can be produced; among them an inexpensive and scalable method based on liquid-phase exfoliation of graphite (LPE) holds potential for applications in opto-electronics and nanocomposites. Here we have used n-octylbenzene molecules as graphene dispersion-stabilizing agents during the graphite LPE process. We have demonstrated that by tuning the ratio between organic solvents such as N-methyl-2-pyrrolidinone or ortho-dichlorobenzene and n-octylbenzene molecules, the concentration of exfoliated graphene can be enhanced by 230% as a result of the high affinity of the latter molecules for the basal plane of graphene. The LPE processed graphene dispersions were further deposited onto solid substrates by exploiting a new deposition technique called spin-controlled drop casting, which was shown to produce uniform highly conductive and transparent graphene films.
Associations between Sleep Duration and Overweight/Obesity: Results from 66,817 Chinese Adolescents
Authors: Wu Jie , Wu Hong , Wang Juan , Guo Lan , Deng Xueqing , Lu Ciyong
Published: November 2015

The findings about the shapes of associations between sleep duration and overweight/obesity in adolescents were largely inconsistent in the existing literature. We examined the functional forms of the associations between sleep duration and overweight/obesity in 66,817 Chinese adolescents by modelling sleep duration categorically and continuously. The adjusted ORs (95% CI) of overweight (with 7.0–8.9 h of sleep being considered the reference group) for subjects reporting <5.0 hours, 5.0–6.9 hours and ≥9.0 hours of sleep were 1.26 (1.05–1.51), 1.06 (1.00–1.11) and 1.27 (1.14–1.42), respectively. The adjusted ORs (95% CI) of obesity (with 7.0–8.9 h of daily sleep being considered as the reference group) for adolescents reporting <5.0 hours, 5.0–6.9 hours and ≥9.0 hours of sleep were 1.24 (0.97–1.57), 0.94 (0.87–1.01) and 1.42 (1.24–1.63), respectively. Continuous splines regressions support non-linear U shape associations between sleep duration and overweight/obesity, with the bottom at around 7.0–8.0 hours sleep (overweight: likelihood ratio = 32.7 p < 0.01; obesity: likelihood ratio = 40.4 p < 0.01). U-shape associations were found between sleep duration and overweight/obesity in Chinese adolescents and an optimal sleep duration of 7.0–8.0 hours sleep may prevent overweight/obesity.
Co-Expression Network Models Suggest that Stress Increases Tolerance to Mutations
Authors: Lehtinen Sonja , Bähler Jürg , Orengo Christine
Published: November 2015

Network models are a well established tool for studying the robustness of complex systems, including modelling the effect of loss of function mutations in protein interaction networks. Past work has concentrated on average damage caused by random node removal, with little attention to the shape of the damage distribution. In this work, we use fission yeast co-expression networks before and after exposure to stress to model the effect of stress on mutational robustness. We find that exposure to stress decreases the average damage from node removal, suggesting stress induces greater tolerance to loss of function mutations. The shape of the damage distribution is also changed upon stress, with a greater incidence of extreme damage after exposure to stress. We demonstrate that the change in shape of the damage distribution can have considerable functional consequences, highlighting the need to consider the damage distribution in addition to average behaviour.
Targeting kinases with anilinopyrimidines: discovery of N-phenyl-N’-[4-(pyrimidin-4-ylamino)phenyl]urea derivatives as selective inhibitors of class III receptor tyrosine kinase subfamily
Authors: Gandin Valentina , Ferrarese Alessandro , Dalla Via Martina , Marzano Cristina , Chilin Adriana , Marzaro Giovanni
Published: November 2015

Kinase inhibitors are attractive drugs/drug candidates for the treatment of cancer. The most recent literature has highlighted the importance of multi target kinase inhibitors, although a correct balance between specificity and non-specificity is required. In this view, the discovery of multi-tyrosine kinase inhibitors with subfamily selectivity is a challenging goal. Herein we present the synthesis and the preliminary kinase profiling of a set of novel 4-anilinopyrimidines. Among the synthesized compounds, the N-phenyl-N’-[4-(pyrimidin-4-ylamino)phenyl]urea derivatives selectively targeted some members of class III receptor tyrosine kinase family. Starting from the structure of hit compound19 we synthesized a further compound with an improved affinity toward the class III receptor tyrosine kinase members and endowed with a promising antitumor activity both in vitro and in vivo in a murine solid tumor model. Molecular modeling simulations were used in order to rationalize the behavior of the title compounds.
Combined use of spatial restraint stress and middle cerebral artery occlusion is a novel model of post-stroke depression in mice
Authors: Zhang Gaocai , Chen Li , Yang Lingli , Hua Xiaodong , Zhou Beiqun , Miao Zhigang , Li Jizhen , Hu Hua , Namaka Michael , Kong Jiming , Xu Xingshun
Published: November 2015

Post stroke depression (PSD) is one of the most common complications of ischemic stroke. At present, the underlying mechanisms are unclear, largely because there are no reliable, valid and reproducible animal models of PSD. Here we report a novel animal model of PSD that displays consistent and reliable clinical features of hemiplegic stroke. The animal model encompasses a combination of the middle cerebral artery occlusion (MCAO) and spatial restraint stress. We found that a 60-minute MCAO followed by spatial restraint stress for 2 h daily for 2 to 4 weeks from the fourth day after MCAO induced PSD-like depressive phenotypes in mice. Importantly, the mice showed exacerbated deficits of neurological functions and decreased body weights, which were accompanied with reduced levels of brain derived neurotrophic factor and neurotransmitters including serotonin and dopamine. In addition, we identified increased levels of serum cortisol in our PSD mice. Finally, we found that mice with PSD were responsive to the tri-cyclic antidepressant imipramine as evidenced by their attenuated depressive behaviors, increased body weights, recovered brain serotonin levels and decreased serum cortisol levels. This mouse model replicates multiple features of human post-stroke depression and thus provides a new model for the investigation of PSD.
Compression of X-ray Free Electron Laser Pulses to Attosecond Duration
Authors: Sadler James D. , Nathvani Ricky , Oleśkiewicz Piotr , Ceurvorst Luke A. , Ratan Naren , Kasim Muhammad F. , Trines Raoul M. G. M. , Bingham Robert , Norreys Peter A.
Published: November 2015

State of the art X-ray Free Electron Laser facilities currently provide the brightest X-ray pulses available, typically with mJ energy and several hundred femtosecond duration. Here we present one- and two-dimensional Particle-in-Cell simulations, utilising the process of stimulated Raman amplification, showing that these pulses are compressed to a temporally coherent, sub-femtosecond pulse at 8% efficiency. Pulses of this type may pave the way for routine time resolution of electrons in nm size potentials. Furthermore, evidence is presented that significant Landau damping and wave-breaking may be beneficial in distorting the rear of the interaction and further reducing the final pulse duration.
Role of YAP and TAZ in pancreatic ductal adenocarcinoma and in stellate cells associated with cancer and chronic pancreatitis
Authors: Morvaridi Susan , Dhall Deepti , Greene Mark I. , Pandol Stephen J. , Wang Qiang
Published: November 2015

Pancreatic ductal adenocarcinoma (PDAC) is characterized by a fibrotic and inflammatory microenvironment that is formed primarily by activated, myofibroblast-like, stellate cells. Although the stellate cells are thought to contribute to tumorigenesis, metastasis and drug resistance of PDAC, the signaling events involved in activation of the stellate cells are not well defined. Functioning as transcription co-factors, Yes-associated protein (YAP) and its homolog transcriptional co-activator with PDZ-binding motif (TAZ) modulate the expression of genes involved in various aspects of cellular functions, such as proliferation and mobility. Using human tissues we show that YAP and TAZ expression is restricted to the centroacinar and ductal cells of normal pancreas, but is elevated in cancer cells. In particular, YAP and TAZ are expressed at high levels in the activated stellate cells of both chronic pancreatitis and PDAC patients as well as in the islets of Langerhans in chronic pancreatitis tissues. Of note, YAP is up regulated in both acinar and ductal cells following induction of acute and chronic pancreatitis in mice. These findings indicate that YAP and TAZ may play a critical role in modulating pancreatic tissue regeneration, neoplastic transformation and stellate cell functions in both PDAC and pancreatitis.
Cost-Effective and Highly Photoresponsive Nanophosphor-P3HT Photoconductive Nanocomposite for Near-Infrared Detection
Authors: Tong Yi , Zhao Xinyu , Tan Mei Chee , Zhao Rong
Published: November 2015

The advent of flexible optoelectronic devices has accelerated the development of semiconducting polymeric materials. We seek to replace conventional expensive semiconducting photodetector materials with our cost-effective composite system. We demonstrate in this work the successful fabrication of a photoconductive composite film of poly(3-hexylthiophene-2,5-diyl) (P3HT) mixed with NaYF4:Yb,Er nanophosphors that exhibited a ultrahigh photoresponse to infrared radiation. The high photocurrent measured was enabled by the unique upconversion properties of NaYF4:Yb,Er nanophosphors, where low photon energy infrared excitations are converted to high photon energy visible emissions that are later absorbed by P3HT. Here we report, a significant 1.10 × 105 times increment of photocurrent from our photoconductive composite film upon infrared light exposure, which indicates high optical-to-electrical conversion efficiency. Our reported work lays the groundwork for the future development of printable, portable flexible and functional photonic composites for light sensing and harvesting, photonic memory devices and phototransistors.
FTIR imaging of the 3D extracellular matrix used to grow colonies of breast cancer cell lines
Authors: Smolina Margarita , Goormaghtigh Erik
Published: November 2015

Infrared imaging was applied to investigate a reconstituted basement membrane, known as Matrigel, in three-dimensional cell cultures.
A novel approach to the consecutive extraction of drugs with different properties via on chip electromembrane extraction
Authors: Asl Yousef Abdossalami , Yamini Yadollah , Seidi Shahram
Published: November 2015

Lab on chip electromembrane extraction coupled with HPLC was introduced for analysis of betaxolol, naltrexone and nalmefene in biological samples.
Silver(i)-mediated three-component annulation reaction of [60]fullerene, sulfonylhydrazones, and nitriles: leading to diverse disubstituted [60]fullerene-fused dihydropyrroles
Authors: Chao Di , Liu Tong-Xin , Ma Nana , Zhang Pengling , Fu Zheng , Ma Jinliang , Liu Qingfeng , Zhang Fengjin , Zhang Zhiguo , Zhang Guisheng
Published: November 2015

A novel Ag(i)-mediated three-component annulation reaction of C60, sulfonylhydrazones, and nitriles is developed for the synthesis of diverse disubstituted C60-fused dihydropyrroles.
Switchable asymmetric bio-epoxidation of α,β-unsaturated ketones
Authors: Liu Yu-Chang , Wu Zhong-Liu
Published: November 2015

Efficient asymmetric bio-epoxidation of electron-deficient α,β-unsaturated ketones was realized via a tandem reduction-epoxidation-dehydrogenation cascade in a switchable manner.
Enantioselective targeting left-handed Z-G-quadruplex
Authors: Zhao Andong , Zhao Chuanqi , Ren Jinsong , Qu Xiaogang
Published: November 2015

Herein, we report the first example where anM-enantiomer of a chiral metal complex can selectively stabilize a left-handed G-quadruplex, but itsP-enantiomer cannot.
Oligoamylose-entwined porphyrin: excited-state induced-fit for chirality induction
Authors: Morisue Mitsuhiko , Yumura Takashi , Sawada Risa , Naito Masanobu , Kuroda Yasuhisa , Chujo Yoshiki
Published: November 2015

An oligoamylose-strapped porphyrin displayed circularly polarized luminescence (CPL) in the S1 state despite being silent in circular dichroism (CD) in the ground state, suggesting chirality induction in the photoexcited porphyrin moiety from the oligoamylose-strap in the photoexcited state.
Multiplex detection of histone-modifying enzymes by total internal reflection fluorescence-based single-molecule detection
Authors: Ma Fei , Liu Meng , Wang Zi-yue , Zhang Chun-yang
Published: November 2015

We develop a sensitive and selective method for the multiplex detection of histone-modifying enzymes using total internal reflection fluorescence-based single-molecule detection.
Dendrimer porphyrin-coated gold nanoshells for the synergistic combination of photodynamic and photothermal therapy
Authors: Chung Ui Seok , Kim Joo-Ho , Kim Byeonggwan , Kim Eunkyoung , Jang Woo-Dong , Koh Won-Gun
Published: November 2015

A dendrimer porphyrin (DP)-coated gold nanoshell (AuNS-DP) was prepared for the synergistic combination of photodyanmic and photothermal therapy.
In situ monitoring the role of citrate in chemical bath deposition of PbS thin films
Authors: Sengupta Sucheta , Perez Maayan , Rabkin Alexander , Golan Yuval
Published: November 2015

We report the formation of size tunable PbS nanocubes induced by the presence of trisodium citrate during growth of PbS thin films by chemical bath deposition. The presence of citrate induces growth by the cluster mechanism which is monitored by XRD and HRSEM, along with real time light scattering and optical absorption measurements.
The influence of cations on lithium ion coordination and transport in ionic liquid electrolytes: a MD simulation study
Authors: Lesch Volker , Li Zhe , Bedrov Dmitry , Borodin Oleg , Heuer Andreas
Published: November 2015

The dynamical and structural properties in two ionic liquid electrolytes (ILEs) based on [emim][TFSI] and [pyr13][TFSI] were compared as a function of LiTFSI salt concentrations using atomistic molecular dynamics (MD) simulations.
The roles of different titanium species in TS-1 zeolite in propylene epoxidation studied by in situ UV Raman spectroscopy
Authors: Xiong Guang , Cao Yuanyuan , Guo Zhendong , Jia Qianying , Tian Fuping , Liu Liping
Published: November 2015

The role of different titanium species in TS-1 zeolite has been investigated by gas chromatography-Raman spectrometry during the propylene epoxidation process.
Interaction of C60 fullerenes with asymmetric and curved lipid membranes: a molecular dynamics study
Authors: Cherniavskyi Yevhen K. , Ramseyer Christophe , Yesylevskyy Semen O.
Published: November 2015

Interaction of C60 fullerenes with asymmetric and curved DOPC/DOPS bicelles is studied by the coarse-grained MD simulations. The effects caused by asymmetric lipid composition of the membrane leaflets and the curvature of the membrane are analyzed.
Negative photoconductivity of InAs nanowires
Authors: Han Yuxiang , Zheng Xiao , Fu Mengqi , Pan Dong , Li Xing , Guo Yao , Zhao Jianhua , Chen Qing
Published: November 2015

Negative photoconductivity is observed in InAs nanowires without a surface defective layer, and is induced by gas adsorption and the photogating effect.
Smallest molecular chalcogenidometalate anions of the heaviest metals: syntheses, structures, and their interconversion
Authors: Thiele G. , Donsbach C. , Riedel R. , Marsch M. , Harms K. , Dehnen S.
Published: November 2015

Smallest chalcogenidometalate anions of the heaviest metals are presented alongside calculated energetics of these heaviest homologues of [NOx]−, [PO4]2−and [CO3]2−.
Hydrogels based on cellulose and chitin: fabrication, properties, and applications
Authors: Shen Xiaoping , Shamshina Julia L. , Berton Paula , Gurau Gabriela , Rogers Robin D.
Published: November 2015

A review of the synthesis and applications of renewable, biocompatible, and biodegradable hydrogels made from cellulose, chitin, and some of their derivatives indicates increased attention due to their excellent processability, high absorbency, porosity, bioactivity, and abundant active groups.
One-pot, efficient and green synthesis of acridinedione derivatives using highly monodisperse platinum nanoparticles supported with reduced graphene oxide
Authors: Aday Burak , Yıldız Yunus , Ulus Ramazan , Eris Sinan , Sen Fatih , Kaya Muharrem
Published: November 2015

An efficient, high yielding, quick method has been developed for the synthesis of acridinedione derivatives using highly monodisperse Pt NPs@rGO.
Highly selective colorimetric and reversible fluorometric turn-off sensors based on the pyrimidine derivative: mimicking logic gate operation and potential applications
Authors: Gupta Neha , Singhal Divya , Singh Ashok Kumar
Published: November 2015

Two simple and efficient energy transfer based fluorogenic receptors exhibiting high sensitivity for the Ni2+ion and its validation using DFT geometry optimization.
A novel 2D infinite M3L2 cage-based Cd(ii) microporous coordination polymer with a tripodal carboxylic acid ligand and solvent-dependent luminescence properties
Authors: Su Jian , Yao Liudi , Zhang Jun , Yuan Shizhen , Xie Fazhi , Ding Yi , Zhao Meng , Wang Shichao , Li Hao , Zhang Shengyi , Wu Jieying , Tian Yupeng
Published: November 2015

A novel M3L2 cage-based microporous coordination polymer has an obvious, surface-enhanced luminescence in the solvents CH2Cl2 and CHCl3.
NMR, surface tension and conductivity studies to determine the inclusion mechanism: thermodynamics of host–guest inclusion complexes of natural amino acids in aqueous cyclodextrins
Authors: Saha Subhadeep , Ray Tanusree , Basak Saptarshi , Roy Mahendra Nath
Published: November 2015

The novel study explains the formation of 1 : 1 host–guest inclusion complexes based upon hydrophobic effects, H-bonds, electrostatic forces and structural effects.
The dual aptamer approach: rational design of a high-affinity FAD aptamer
Authors: Merkle T. , Holder I. T. , Hartig J. S.
Published: November 2015

Fusion of FMN and adenosine aptamers results in dual aptamers that recognize the complex co-factor FAD with enhanced affinity.
Copper-catalyzed domino synthesis of benzo[b]thiophene/imidazo[1,2-a]pyridines by sequential Ullmann-type coupling and intramolecular C(sp2)–H thiolation
Authors: Yan Kelu , Yang Daoshan , Wei Wei , Lu Shenglei , Li Guoqing , Zhao Caixia , Zhang Qingyun , Wang Hua
Published: November 2015

An efficient method for the synthesis of benzo[b]thiophene/imidazo[1,2-a]pyridines has been developed via copper-catalyzed double C–S bond formation using K2S as a sulfur source.
Effect of N-based additive on the optimization of liquid phase oxidation of bicyclic, cyclic and aromatic alcohols catalyzed by dioxidomolybdenum(vi) and oxidoperoxidomolybdenum(vi) complexes
Authors: Maurya Mannar R. , Saini Neeraj , Avecilla Fernando
Published: November 2015

Catalytic potentials of [MoVIO2]2+ and [MoVIO(O2)]2+ complexes with dibasic tridentate ONO donor ligands for the oxidation of bicyclic, cyclic and aromatic alcohols in the presence of NEt3 are reported.
Preparation, characterization and application of antibody-conjugated magnetic nanoparticles in the purification of begomovirus
Authors: Denison Michael Immanuel Jesse , Raman Sukanya , Duraisamy Nallusamy , Thangavelu Raja Muthuramalingam , Riyaz S. U. Mohammed , Gunasekaran Dharanivasan , Krishnan Kathiravan
Published: November 2015

Purification of begomovirus from infected ash gourd leaf samples using anti-ACMV antibody-conjugated magnetic nanoparticles (Ab-MNPs) and their characterization.
Antioxidant and hepatoprotective effects of the food seasoning curry leaves Murraya koenigii (L.) Spreng. (Rutaceae)
Authors: Ho Wan Yong , Beh Boon Kee , Lim Kian Lam , Mohamad Nurul Elyani , Yusof Hamidah Mohd , Ky Huynh , Tan Sheau Wei , Jamaluddin Anisah , Long Kamariah , Lim Chung Lu , Alitheen Noorjahan Banu , Yeap Swee Keong
Published: November 2015

The curry leaf water extract, which is rich in gallic acid, reversed paracetamol-induced liver damage in mice by reducing inflammation and oxidative stress.
Potential urine biomarkers from a high throughput metabolomics study of severe sepsis in a large Asian cohort
Authors: Liang Qun , Liu Han , Zhang Tianyu , Jiang Yan , Xing Haitao , Zhang Ai-hua
Published: November 2015

Non-targeted mass spectrometry was used to characterize peripheral biomarkers associated with the urine metabolome in severe sepsis (SS) patients. This is an efficient and convenient tool for diagnosing and screening of SS in a high-risk population.
Highly effective chemosensor of a luminescent silica@lanthanide complex@MOF heterostructured composite for metal ion sensing
Authors: Liu Chang , Yan Bing
Published: November 2015

A highly selective and sensitive heterogeneous sensor to detect Cu2+ in aqueous solution has good fluorescence stability, low detection limit and broad linear range making it a potential chemosensor for Cu2+ in environmental systems.
New acetylacetone-polymer modified nanoparticles as magnetically separable complexing agents
Authors: Misztalewska I. , Wilczewska A. Z. , Wojtasik O. , Markiewicz K. H. , Kuchlewski P. , Majcher A. M.
Published: November 2015

In this paper, we present two methods of synthesis of new bifunctional polymeric nanohybrids, their full characterization and the ability to complex lanthanides ions.
Can Si-embedded boron nitride nanotubes act as a favorable metal-free catalyst for CO oxidation by N2O?
Authors: Esrafili Mehdi D. , Saeidi Nasibeh , Nematollahi Parisa
Published: November 2015

N2O adsorption over Si-doped BNNT.
Precise nanoinjection molding through local film heating system
Authors: Oh Hwa Jin , Song Young Seok
Published: November 2015

A new local film heating system (LFHS) can precisely control the local mold wall temperature in the nanoinjection molding process.
Broad-spectrum chemiluminescence covering a 400–1400 nm spectral region and its use as a white-near infrared light source for imaging
Authors: Zheng Xiuping , Qiao Wenqiang , Wang Zhi Yuan
Published: November 2015

Broad-spectrum chemiluminescence has been achieved and used as a white-near infrared light source for imaging techniques.
Formation of PCDTBT:PC71BM p–n junction composite nanotubes via a templating method
Authors: Bakar N. A. , Supangat A. , Sulaiman K.
Published: November 2015

The use of a templating method to synthesize a p–n junction composite of PCDTBT:PC71BM is reported in this study.
Evaluation of contact time and fiber morphology on bacterial immobilization for development of novel surfactant degrading nanofibrous webs
Authors: Sarioglu Omer Faruk , Celebioglu Asli , Tekinay Turgay , Uyar Tamer
Published: November 2015

Novel electrospun fibrous biocomposites were developed by immobilizing two different sodium dodecyl sulfate (SDS) biodegrading bacterial strains on electrospun non-porous cellulose acetate (nCA) and porous cellulose acetate (pCA) webs.
Spontaneous instabilities and stick-slip motion in a generalized Hébraud–Lequeux model
Authors: Bouchaud Jean-Philippe , Gualdi Stanislao , Tarzia Marco , Zamponi Francesco
Published: November 2015

We revisit the Hébraud–Lequeux (HL) model for the rheology of jammed materials and argue that a possibly important time scale is missing from HL's initial specification.
Surface area enhancement by mesoporous silica deposition on microcantilever sensors for small molecule detection
Authors: Stassi Stefano , Cauda Valentina , Fiorilli Sonia , Ricciardi Carlo
Published: November 2015

We demonstrate here an easy and controlled technique to enhance the surface active area via highly porous inorganic nanostructure growth on the surface of a microcantilever.
YAG phosphor with spatially separated luminescence centers
Authors: Qin Haiming , Jiang Jun , Luo Zhaohua , Jiang Haochuan
Published: November 2015

A transition solution for phosphor spectra designation between activator co-doped phosphors and blended monochromatic phosphors.
Conformational dynamics of Ca2+-dependent responses in the polycystin-2 C-terminal tail
Authors: Yang Yifei , Hodsdon Michael E. , Lolis Elias J. , Ehrlich Barbara E.
Published: November 2015

PC2 (polycystin-2) forms a Ca2+-permeable channel in the cell membrane and its function is regulated by cytosolic Ca2+ levels. Mutations in the C-terminal tail of human PC2 (HPC2 Cterm) lead to autosomal dominant polycystic kidney disease. The HPC2 Cterm protein contains a Ca2+-binding site responsible for channel gating and function. To provide the foundation for understanding how Ca2+ regulates the channel through the HPC2 Cterm, we characterized Ca2+ binding and its conformational and dynamic responses within the HPC2 Cterm. By examining hydrogen–deuterium (H–D) exchange profiles, we show that part of the coiled-coil domain in the HPC2 Cterm forms a stable helix bundle regardless of the presence of Ca2+. The HPC2 L1EF construct contains the Ca2+-binding EF-hand and the N-terminal linker 1 region without the downstream coiled coil. We show that the linker stabilizes the Ca2+-bound conformation of the EF-hand, thus enhancing its Ca2+-binding affinity to the same level as the HPC2 Cterm. In comparison, the coiled coil is not required for the high-affinity binding. By comparing the conformational dynamics of the HPC2 Cterm and HPC2 L1EF with saturating Ca2+, we show that the HPC2 Cterm and HPC2 L1EF share a similar increase in structural stability upon Ca2+ binding. Nevertheless, they have different profiles of H–D exchange under non-saturating Ca2+ conditions, implying their different conformational exchange between the Ca2+-bound and -unbound states. The present study, for the first time, provides a complete map of dynamic responses to Ca2+-binding within the full-length HPC2 Cterm. Our results suggest mechanisms for functional regulation of the PC2 channel and PC2’s roles in the pathophysiology of polycystic kidney disease.
Composite right–left‐handed‐based antenna with wide applications in very‐high frequency–ultra‐high frequency bands for radio transceivers
Authors: Alibakhshi‐Kenari Mohammad , Naser‐Moghadasi Mohammad , Sadeghzadeh Ramazan Ali
Published: November 2015

This study presents a metamaterial‐based antenna using the concept of composite right–left‐handed transmission‐lines. The radiation‐cells layouts are based on L/F‐shaped slits, so these slits are engraved on the radiation‐patches for establishing a series‐capacitor effect. Moreover, the radiation cells including the spirals and via‐holes for the shunt‐inductors implementation. By cascading the proper number of cells, the desired antennas for very/ultra‐high frequency‐bands are designed. The first‐antenna with four L‐shaped cells isconstructed on the Rogers_RO4003 substrate with thickness of 0.8 mm, so that each of cells occupies the size of 2.3 mm × 4.9 mm. This antenna covers the experimental‐bandwidth of 0.2–1.8 GHz, which corresponds to 160% feasible‐bandwidth. This antenna resonates at frequencies of 600–850–1200–1550 MHz, so highest gain and efficiency, happened at 1550 MHz, are 3.4 dBi and 88%. For improving the antenna performances, the second‐antenna is modelled with one‐cell more than first‐antenna and with changing in the slit configuration to F‐shape and increasing in the same substrate thickness to 1.6 mm. F‐shaped antenna has size of 14.5 mm × 4.4 mm × 1.6 mm, covering a measured‐bandwidth of 0.11–2.1 GHz with five resonance frequencies at 450–725–1150–1670–1900 MHz, which corresponds to 180.1% practical‐bandwidth. Maximum of the measured gain and efficiency of antenna are 4.5 dBi and 95%, which occur at 1900 MHz.
Design of multi‐band bandpass filters based on stub loaded stepped‐impedance resonator with defected microstrip structure
Authors: Wei Feng , Qin Pei‐Yuan , Guo Y. Jay , Shi Xiao‐Wei
Published: November 2015

The design of multi‐band bandpass filters (BPFs) employing stub loaded stepped‐impedance resonator with defected microstrip structure (SL‐SIR‐DMS) is presented in this study for the first time. The proposed SL‐SIR‐DMS is created by embedding DMS on the low‐impedance line of the SL‐SIR. It is found that different defected structures can lead to different frequency responses. In addition, by using DMS, tri‐band and even quad‐band responses can be easily achieved without increasing the resonator size. As verification, one tri‐band SL‐SIR‐DMS and one quad‐band SL‐SIR‐DMS are designed and analysed using even/odd‐mode method. Subsequently, one tri‐band BPF and one quad‐band BPF have been developed with pseudo‐interdigital coupling to realise good out‐of‐band performance. The predicted results are compared with measured ones and good agreement is achieved. Compared with BPFs using only SL‐SIR, the proposed filters with DMS are more compact due to the slow‐wave characteristic. Compared with the BPFs using defected ground structure to improve the stopband performance, the proposed ones can realise comparable wide stopbands but maintaining the signal integrity on the ground plane for packaging purpose.
Private algebras in quantum information and infinite-dimensional complementarity
Authors: Crann Jason , Kribs David W. , Levene Rupert H. , Todorov Ivan G.
Published: November 2015

We introduce a generalized framework for private quantum codes using von Neumann algebras and the structure of commutants. This leads naturally to a more general notion of complementary channel, which we use to establish a generalized complementarity theorem between private and correctable subalgebras that applies to both the finite and infinite-dimensional settings. Linear bosonic channels are considered and specific examples of Gaussian quantum channels are given to illustrate the new framework together with the complementarity theorem.
Three-dimensional equilibria and island energy transport due to resonant magnetic perturbation edge localized mode suppression on DIII-D
Authors: King J. D. , Strait E. J. , Nazikian R. , Paz-Soldan C. , Eldon D. , Fenstermacher M. E. , Ferraro N. M. , Hanson J. M. , Haskey S. R. , La Haye R. J. , Lanctot M. J. , Lazerson S. A. , Logan N. C. , Liu Y. Q. , Okabayashi M. , Park J.-K. , Shiraki D. , Turnbull A. D.
Published: November 2015

Experiments in the DIII-D tokamak show that the plasma responds to resonant magnetic perturbations (RMPs) with toroidal mode numbers of n = 2 and n = 3 without field line reconnection, consistent with resistive magnetohydrodynamic predictions, while a strong nonlinear bifurcation is apparent when edge localized modes (ELMs) are suppressed. The magnetic response associated with this bifurcation is localized to the high field side of the machine and exhibits a dominant n = 1 component despite the application of a constant amplitude, slowly toroidally rotating, n = 2 applied field. The n = 1 mode is born locked to the vacuum vessel wall, while the n = 2 mode is entrained to the rotating field. Based on these magnetic response measurements and Thomson scattering measurements of flattening of the electron temperature profile, it is likely that these modes are magnetic island chains near the H-mode pedestal. The reduction in ∇Te occurs near the q = 4 and 5 rational surfaces, suggesting five unique islands are possible (m = 8, 9, or 10 for n = 2) and (m = 4 or 5 for n = 1). In all cases, the island width is estimated to be 2–3 cm. The Chang-Callen calculated confinement degradation due to the presence of an individual island of this size is 8%–12%, which is close to the 13%–14% measured between the ELMs and suppressed states. This suggests that edge tearing modes may alter the pedestal causing peeling-ballooning stability during RMP induced ELM suppression.
Anatase TiO2 nanowires functionalized by organic sensitizers for solar cells: A screened Coulomb hybrid density functional study
Authors: Ünal Hatice , Gunceler Deniz , Gülseren Oğuz , Ellialtιoğlu Şinasi , Mete Ersen
Published: November 2015

The adsorption of two different organic molecules cyanidin glucoside (C21O11H20) and TA-St-CA on anatase (101) and (001) nanowires has been investigated using the standard and the range separated hybrid density functional theory calculations. The electronic structures and optical spectra of resulting dye–nanowire combined systems show distinct features for these types of photochromophores. The lowest unoccupied molecular orbital of the natural dye cyanidin glucoside is located below the conduction band of the semiconductor while, in the case of TA-St-CA, it resonates with the states inside the conduction band. The wide-bandgap anatase nanowires can be functionalized for solar cells through electron-hole generation and subsequent charge injection by these dye sensitizers. The intermolecular charge transfer character of Donor-π-Acceptor type dye TA-St-CA is substantially modified by its adsorption on TiO2 surfaces. Cyanidin glucoside exhibits relatively stronger anchoring on the nanowires through its hydroxyl groups. The atomic structures of dye–nanowire systems re-optimized with the inclusion of nonlinear solvation effects showed that the binding strengths of both dyes remain moderate even in ionic solutions.
Gauge theories on noncommutative ℂPN and Bogomol’nyi-Prasad-Sommerfield-like equations
Authors: Sako Akifumi , Suzuki Toshiya , Umetsu Hiroshi
Published: November 2015

We give the Fock representation of a noncommutative ℂPN and gauge theories on it. The Fock representation is constructed based on star products given by deformation quantization with separation of variables and operators which act on states in the Fock space are explicitly described by functions of inhomogeneous coordinates on ℂPN. Using the Fock representation, we are able to discuss the positivity of Yang-Mills type actions and the minimal action principle. Bogomol’nyi-Prasad-Sommerfield (BPS)-like equations on noncommutative ℂP1 and ℂP2 are derived from these actions. There are analogies between BPS-like equations on ℂP1 and monopole equations on ℝ3 and BPS-like equations on ℂP2 and instanton equations on ℝ8. We discuss solutions of these BPS-like equations.
Dichotomous noise models of gene switches
Authors: Potoyan Davit. A. , Wolynes Peter. G.
Published: November 2015

Molecular noise in gene regulatory networks has two intrinsic components, one part being due to fluctuations caused by the birth and death of protein or mRNA molecules which are often present in small numbers and the other part arising from gene state switching, a single molecule event. Stochastic dynamics of gene regulatory circuits appears to be largely responsible for bifurcations into a set of multi-attractor states that encode different cell phenotypes. The interplay of dichotomous single molecule gene noise with the nonlinear architecture of genetic networks generates rich and complex phenomena. In this paper, we elaborate on an approximate framework that leads to simple hybrid multi-scale schemes well suited for the quantitative exploration of the steady state properties of large-scale cellular genetic circuits. Through a path sum based analysis of trajectory statistics, we elucidate the connection of these hybrid schemes to the underlying master equation and provide a rigorous justification for using dichotomous noise based models to study genetic networks. Numerical simulations of circuit models reveal that the contribution of the genetic noise of single molecule origin to the total noise is significant for a wide range of kinetic regimes.
A miniaturized, high frequency mechanical scanner for high speed atomic force microscope using suspension on dynamically determined points
Authors: Herfst Rodolf , Dekker Bert , Witvoet Gert , Crowcombe Will , de Lange Dorus , Sadeghian Hamed
Published: November 2015

One of the major limitations in the speed of the atomic force microscope (AFM) is the bandwidth of the mechanical scanning stage, especially in the vertical (z) direction. According to the design principles of “light and stiff” and “static determinacy,” the bandwidth of the mechanical scanner is limited by the first eigenfrequency of the AFM head in case of tip scanning and by the sample stage in terms of sample scanning. Due to stringent requirements of the system, simply pushing the first eigenfrequency to an ever higher value has reached its limitation. We have developed a miniaturized, high speed AFM scanner in which the dynamics of the z-scanning stage are made insensitive to its surrounding dynamics via suspension of it on specific dynamically determined points. This resulted in a mechanical bandwidth as high as that of the z-actuator (50 kHz) while remaining insensitive to the dynamics of its base and surroundings. The scanner allows a practical z scan range of 2.1 μm. We have demonstrated the applicability of the scanner to the high speed scanning of nanostructures.
Polar POLICRYPS diffractive structures generate cylindrical vector beams
Authors: Alj Domenico , Paladugu Sathyanarayana , Volpe Giovanni , Caputo Roberto , Umeton Cesare
Published: November 2015

Local shaping of the polarization state of a light beam is appealing for a number of applications. This can be achieved by employing devices containing birefringent materials. In this article, we present one such enables converting a uniformly circularly polarized beam into a cylindrical vector beam (CVB). This device has been fabricated by exploiting the POLICRYPS (POlymer-LIquid CRYstals-Polymer-Slices) photocuring technique. It is a liquid-crystal-based optical diffraction grating featuring polar symmetry of the director alignment. We have characterized the resulting CVB profile and polarization for the cases of left and right circularly polarized incoming beams.
General expressions and physical origin of the coupling coefficient of arbitrary tuned coupled electromagnetic resonators
Authors: Elnaggar Sameh Y. , Tervo Richard J. , Mattar Saba M.
Published: November 2015

The theory and operation of various devices and systems, such as wireless power transfer via magnetic resonant coupling, magneto-inductive wave devices, magnetic resonance spectroscopy probes, and metamaterials can rely on coupled tuned resonators. The coupling strength is usually expressed in terms of the coupling coefficient κ, which can have electrical κE and/or magnetic κM components. In the current article, general expressions of κ are derived. The relation between the complex Poynting equation in its microscopic form and κ is made and discussed in detail. It is shown that κ can be expressed in terms of the interaction energy between the resonators' modes. It thus provides a general form that combines the magnetic and electric components of κ. The expressions make it possible to estimate the frequencies and fields of the coupled modes for arbitrarily oriented and spaced resonators. Thus, enabling the calculation of system specific parameters such as the transfer efficiency of wireless power transfer systems, resonator efficiency for electron spin resonance probes, and dispersion relations of magneto-inductive and stereo-metamaterials structures.
Strong coupling and polariton lasing in Te based microcavities embedding (Cd,Zn)Te quantum wells
Authors: Rousset J.-G. , Piętka B. , Król M. , Mirek R. , Lekenta K. , Szczytko J. , Borysiuk J. , Suffczyński J. , Kazimierczuk T. , Goryca M. , Smoleński T. , Kossacki P. , Nawrocki M. , Pacuski W.
Published: November 2015

We report on properties of an optical microcavity based on (Cd,Zn,Mg)Te layers and embedding (Cd,Zn)Te quantum wells. The key point of the structure design is the lattice matching of the whole structure to MgTe, which eliminates the internal strain and allows one to embed an arbitrary number of unstrained quantum wells in the microcavity. We evidence the strong light-matter coupling regime already for the structure containing a single quantum well. Embedding four unstrained quantum wells results in further enhancement of the exciton-photon coupling and the polariton lasing in the strong coupling regime.
Note: A novel technique for analysis of aqueous solutions by laser-induced breakdown spectroscopy
Authors: Rusak D. A. , Anthony T. P. , Bell Z. T.
Published: November 2015

Surface-enhanced Raman spectroscopy (SERS) substrates typically consist of gold or silver nanoparticles deposited on a non-conductive substrate. In Raman spectroscopy, the nanoparticles produce an enhancement of the electromagnetic field which, in turn, leads to greater electronic excitation of molecules in the local environment. Here, we show that these same surfaces can be used to enhance the signal-to-noise ratio obtained in laser-induced breakdown spectroscopy of aqueous solutions. In this case, the SERS substrates not only lower breakdown thresholds and lead to more efficient plasma initiation but also provide an appropriately wettable surface for the deposition of the liquid. We refer to this technique as surface-enhanced laser-induced breakdown spectroscopy.
Graphene nanoribbons with wings
Authors: Bischoff D. , Eich M. , Libisch F. , Ihn T. , Ensslin K.
Published: November 2015

We have investigated electronic transport in graphene nanoribbon devices with additional bar-shaped extensions (“wings”) at each side of the device. We find that the Coulomb-blockade dominated transport found in conventional ribbons is strongly modified by the presence of the extensions. States localized far away from the central ribbon contribute significantly to transport. We discuss these findings within the picture of multiple coupled quantum dots. Finally, we compare the experimental results with tight-binding simulations which reproduce the experiment both qualitatively and quantitatively.
Out of equilibrium anomalous elastic response of a water nano-meniscus
Authors: Carpentier Simon , Rodrigues Mario S. , Vitorino Miguel V. , Costa Luca , Charlaix Elisabeth , Chevrier Joël
Published: November 2015

We report the observation of a transition in the dynamical properties of water nano-meniscus which dramatically changes when probed at different time scales. Using an AFM mode that we name Force Feedback Microscopy, we observe this change in the simultaneous measurements, at different frequencies, of the stiffness G′ (N/m), the dissipative coefficient G″ (kg/s) together with the static force. At low frequency we observe a negative stiffness as expected for capillary forces. As the measuring time approaches the microsecond, the dynamic response exhibits a transition toward a very large positive stiffness. When evaporation and condensation gradually lose efficiency, the contact line progressively becomes immobile. This transition is essentially controlled by variations of Laplace pressure.
Arraying single microbeads in microchannels using dielectrophoresis-assisted mechanical traps
Authors: Tirapu-Azpiroz Jaione , Temiz Yuksel , Delamarche Emmanuel
Published: November 2015

Manipulating and immobilizing single microbeads in flowing fluids is relevant for biological assays and chemical tests but typically requires expensive laboratory equipment and trapping mechanisms that are not reversible. In this paper, we present a highly efficient and reversible mechanism for trapping microbeads by combining dielectrophoresis (DEP) with mechanical traps. The integration of planar electrodes and mechanical traps in a microchannel enables versatile manipulation of microbeads via DEP for their docking in recessed structures of mechanical traps. By simulating the combined effects of the hydrodynamic drag and DEP forces on microbeads, we explore a configuration of periodic traps where the beads are guided by the electrodes and immobilized in recess areas of the traps. The design of the electrode layout and operating configuration are optimized for the efficient trapping of single microbeads. We demonstrated the predicted guiding and trapping effectiveness of the design as well as the reversibility of the system on 10 μm polystyrene beads. Experimental verification used an array of 96 traps in an area of 420 × 420 μm2, reaching a trapping efficiency of 63% when 7 Vpp is applied to the electrodes under 80 nl min−1 flow rate conditions, and 98% of bead release when the voltage is turned off.