bluuebunny/crossref_metadata_2025 huggingface dataset:
Circadian exosomal expression of renal thiazide‐sensitive NaCl cotransporter (NCC) and prostasin in healthy individuals
Authors: Castagna Annalisa , Pizzolo Francesca , Chiecchi Laura , Morandini Francesca , Channavajjhala Sarath Kiran , Guarini Patrizia , Salvagno Gianluca , Olivieri Oliviero
Published: May 2015

Purpose

A circadian timing system is involved in the maintenance of fluid and electrolyte balance and blood pressure control. Aldosterone and vasopressin modulate ion transporters and channels crucial in sodium (Na) and water reabsorption such as the epithelium Na channel and the renal thiazide‐sensitive NaCl cotransporter (NCC). We analyzed in urinary exosomes the intraday variations of NCC and prostasin expression and the association with electrolytes and water balance parameters.

Experimental design

Blood and urine samples were collected at five time points during the day from five healthy subjects. Blood renin, aldosterone, cortisol, ACTH, and plasmatic and urinary Na, potassium, creatinine, adiuretin (ADH), NCC, and prostasin were evaluated.

Results

ACTH and cortisol showed a circadian pattern, similarly to aldosterone, while exosomal NCC and prostasin pattern were similar to urinary ADH, decreased in the morning and subsequently increased in the afternoon and evening.

Conclusions and clinical relevance

In urinary exosomes, NCC and prostasin had a diurnal pattern parallel to ADH and aquaporin 2, confirming that, in healthy subjects, both prostasin and NCC relate to water balance. These results provide suggestions for a possible chronotherapeutic approach in patients treated with thiazides, diuretic drugs acting as specific inhibitors of NCC‐mediated Na reabsorption.
A dynamic identity‐based user authentication scheme for remote login systems
Authors: Li Chun‐Ta , Lee Cheng‐Chi , Weng Chi‐Yao
Published: May 2015

With the purpose of accessing numerous network resources and services with user anonymity, various dynamic identity (ID)‐based user authentication schemes have been proposed. Recently, Khan et al. have pointed out the security weaknesses of the dynamic ID‐based user authentication scheme of Wang et al. and proposed an improved version of dynamic ID‐based user authentication scheme for remote login systems. They claimed that their scheme can withstand various security attacks and provide user anonymity. However, we found that the scheme of Khan et al. cannot preserve user anonymity if login message and system parameters are collected by the attacker. To ensure user anonymity, in this paper, we propose a new dynamic ID‐based user authentication scheme for remote login environments and the proposed scheme enables the user's real identity to mask periodically when the user logs into the remote server. Compared with the related schemes, the proposed scheme satisfies more admired criteria and it is suitable even for applications in low‐power computing environments. Finally, we formally prove the security of the proposed scheme by employing the Burrows–Abadi–Needham logic. Copyright © 2015 John Wiley & Sons, Ltd.
Au@pNIPAM SERRS Tags for Multiplex Immunophenotyping Cellular Receptors and Imaging Tumor Cells
Authors: Bodelón Gustavo , Montes‐García Verónica , Fernández‐López Cristina , Pastoriza‐Santos Isabel , Pérez‐Juste Jorge , Liz‐Marzán Luis M.
Published: May 2015

Detection technologies employing optically encoded particles have gained much interest toward clinical diagnostics and drug discovery, but the portfolio of available systems is still limited. The fabrication and characterization of highly stable surface‐enhanced resonance Raman scattering (SERRS)‐encoded colloids for the identification and imaging of proteins expressed in cells are reported. These plasmonic nanostructures are made of gold octahedra coated with poly(N‐isopropylacrylamide) microgels and can be readily encoded with Raman active dyes while retaining high colloidal stability in biofluids. A layer‐by‐layer polyelectrolyte coating is used to seal the outer surface of the encoded particles and to provide a reactive surface for covalent conjugation with antibodies. The targeted multiplexing capabilities of the SERRS tags are demonstrated by the simultaneous detection and imaging of three tumor‐associated surface biomarkers: epidermal growth factor receptor (EGFR), epithelial cell adhesion molecule (EpCAM), and homing cell adhesion molecule (CD44) by SERRS spectroscopy. The plasmonic microgels are able to discriminate tumor A431 (EGFR+/EpCAM+/CD44+) and nontumor 3T3 2.2 (EGFR−/EpCAM−/CD44+) cells while cocultured in vitro.
A radar‐based rainfall climatology of Great Britain and Ireland
Authors: Fairman Jonathan G. , Schultz David M. , Kirshbaum Daniel J. , Gray Suzanne L. , Barrett Andrew I.
Published: May 2015

The Met Office 1km radar‐derived precipitation‐rate composite over 8 years (2006–2013) is examined to evaluate whether it provides an accurate representation of annual‐average precipitation over Great Britain and Ireland over long periods of time. The annual‐average precipitation from the radar composite is comparable with gauge measurements, with an average error of +23mmyr−1 over Great Britain and Ireland, +29mmyr−1 (3%) over the United Kingdom and –781mmyr−1 (46%) over the Republic of Ireland. The radar‐derived precipitation composite is useful over the United Kingdom including Northern Ireland, but not accurate over the Republic of Ireland, particularly in the south.
Hair tourniquet syndrome
Authors: Alruwaili N. , Alshehri Hassan A. , Halimeh Bachar
Published: May 2015

Hair tourniquet syndrome is a clinical phenomenon that involves hair or thread becoming so tightly wrapped around an appendage that pain, swelling and occasionally ischemia result. We report two cases of hair tourniquet syndrome that affected the digits and were treated with hair removal cream, which was an easy, effective and less invasive treatment method compared with standard managements such as incision or blunt probe cut-ting techniques.
Pace mapping in the atrium using bipolar electrograms from widely spaced electrodes
Authors: Selvaraj Raja J. , Yerram Sreekanth , Kumar Pradeep , Satheesh Santhosh , Pillai Ajith Ananthakrishna , Saktheeswaran Mahesh Kumar , Balachander Jayaraman
Published: May 2015

Background

Pace mapping is a useful tool but is of limited utility for the atrium because of poor spatial resolution. We investigated the use of bipolar electrograms recorded from widely spaced electrodes in order to improve the resolution of pace mapping.

Methods

This prospective study included patients undergoing a clinical electrophysiology study. Unipolar pacing from either the superior or inferior lateral right atrium was performed to simulate atrial tachycardia. Twelve‐lead electrocardiograms were recorded during pacing as a template. In addition, three intracardiac bipolar electrograms from a set of widely spaced electrodes were also recorded. Subsequently, unipolar pacing was performed from electrodes at known distances from the initial pacing site, and the morphology of P waves in the electrocardiogram and bipolar electrograms were compared with that of the template. Morphological comparison was performed by a cardiologist and by automated computerized matching. Spatial resolution was calculated as the minimum distance at which there was no match.

Results

Fifteen patients participated in the study. Distance at which differences in morphology were noted was smaller in the bipolar electrograms compared to that indicated by P waves in the electrocardiogram, when matched by the cardiologist (6.1±3.8 mm vs. 9.9±5.2 mm, p=0.012) or by automated analysis (4±0 mm vs. 9.9±4 mm, p<0.001).

Conclusions

Use of three bipolar electrograms recorded from a set of widely spaced electrodes in the right atrium improves the resolution of pace mapping compared to that using P waves from surface electrocardiograms alone.
Firm performance in dynamic environments: The role of operational slack and operational scope
Authors: Kovach Jeremy J. , Hora Manpreet , Manikas Andrew , Patel Pankaj C.
Published: May 2015

This study examines the effects of operational scope (breadth of product offering, extent of geographical diversification, and extent to which production processes can effectively meet varying demand) and operational slack (resources in excess of what is required to fulfill expected demand) on firm performance, contingent on two components of a firm's dynamic environment, unpredictability and instability. We collate quarterly data on 3857 publicly traded firms in 19 industries from the years 1991 to 2013 (representing 99,559 firm‐quarter observations). Using panel data analysis, we find that narrow product offerings, low geographical diversification, low levels of excess capacity, and low inventory slack are each positively associated with firm performance. More importantly though, we find that operational scope is associated with improved performance in unpredictable environments, whereas operational slack is associated with improved performance in unstable environments. These findings contribute to the research on operations strategy by identifying the industry‐specific environmental conditions under which operational slack and operational scope are associated with firm performance.
¿Cómo elaborar una rúbrica?
Authors: Gatica-Lara Florina , Uribarren-Berrueta Teresita Del Niño Jesús
Published: May 2015

La rúbrica es un instrumento de evaluación auténtica del desempeño de los estudiantes. En el presente documento se define y describe el proceso para elaborar las rúbricas, sus ventajas y desventajas. Además se listan algunas herramientas web para la creación de e-rúbricas.
Connection Before Correction: Supporting Parents to Meet the Challenges of Parenting Children who have been Traumatised within their Early Parenting Environments
Authors: Golding Kim S.
Published: May 2015

This paper is based on a presentation I gave to the Childhood Trauma Conference in Melbourne, Australia, August 2014.

Children traumatised within their biological families are described as children who have experienced complex trauma, also called developmental trauma because of the profound impact it has on their development. These children present a range of challenging behaviours within their foster or adoptive families. They respond less well to traditional behavioural management and benefit more from regulatory and relationship-based parenting. This is parenting that focuses on helping the children to regulate their emotional experience through the emotional connection between parent and child before attention is given to the behaviour. Developmentally traumatised children have a foundation of mistrust of parents and thus experience management of behaviour as signs that they are going to be hurt or rejected again. These children need parents who can connect with the child's experience before, or when appropriate instead of, discipline. This is described here as ‘connection before correction’. Correction in this context means helping children to develop pro-social behaviours and to find safe ways to express intense emotional experience. This paper explores the difficulties that the children can experience living in families; how this is expressed through behaviours, and how parents can connect in ways that promote the building of trust and allows successful management of their behaviour.
Lip Ornaments and the Domestication of Trade Goods: Fashion in Sixteenth and Seventeenth Century Central East Africa
Authors: Seligman Andrea Felber
Published: May 2015

This article presents a history of sixteenth and seventeenth century central East African efforts to define elements of a regional fashion aesthetic, one supplied by their engaged participation in wider African and Indian Ocean world economies. I investigate regional artisanal economies in the central East African mainland, looking specifically at communities in what is now southern Tanzania and northern Mozambique and their uses of one of the most “exoticized” elements of their fashion: lip ornaments often called lip-plugs. Close readings of sixteenth and seventeenth century Portuguese accounts and historical linguistics evidence reveals a new history of developing regional fashion trends. Such a history underscores the importance of regional consumers and artisanal experts in shaping wider East African precolonial economies.
Early sealing regimes: the Bering Sea fur seal regimevis-à-visFinnish–Soviet fishing and sealing agreements
Authors: Sellheim Nikolas
Published: May 2015

Environmental management had its early stages in the early years of the 20th century. This note contrasts the different regimes that emerged with regard to the management of seals and the seal hunt: the well-researched Bering Sea regime and the little known regimes between Finland and the Soviet Union. While the former shaped and already embedded principles of modern environmental law and has the seal population as its primary focus, the latter agreements did not make reference to the environmental dimension of the seal hunt, but must be read against the backdrop of the difficult border situations between the two countries.
“Most Fitting Companions”: Making Mixed-Race Bodies Visible in Antebellum Public Spaces
Authors: Merrill Lisa
Published: May 2015

In the years leading up to the U.S. Civil War, free and fugitive persons of color were aware of the need to frame how they were seen in their everyday lives as part of an arsenal of rhetorical strategies to attract audiences to the abolitionist cause. In this article, I examine three spatial contexts that nineteenth-century mixed-race persons navigated for abolitionist ends in which their hybrid bodies were featured as an aspect of their public performances. These locations—Britain's imperially sponsored Crystal Palace, a Brooklyn church pulpit, and the dramatic reader's lectern—were not merely static places but were spaces animated and made meaningful by the interactions performed therein. Each framed a particular ocular and locational politics and strategically imbued some degree of social class privilege on the hybrid persons following its social scripts. But in so doing, each setting also reinforced colorism and contributed to notions of the supremacy of “whiteness” even while it furthered an antislavery agenda.
The Radical Formalism of Suzan-Lori Parks and Sarah Kane
Authors: Mihaylova Stefka
Published: May 2015

When Suzan-Lori Parks's playVenus, about the displays of Saartjie Baartman in early nineteenth-century Europe, opened in 1996, the outrage it provoked by suggesting that its central, black character may have been complicit in her plight raised yet again one of the most inspiring and frustrating questions in modern US theatre history: how to stage the racial Other. Even the most sympathetic responses to the play revealed the difficulty of assuming a critical stance toward the racially marked body (especially the black female body) that is affectively fixed as a symbol of martyrdom and victimization. In fact, Shannon Jackson has proposed that the racially marked body's resistance to being reduced to a critical sign, free from affect, may be definitive of race as a social phenomenon. As US theatre history demonstrates, onstage this resistance is highly productive of controversy, much of which has focused on the question of which representational contracts may most accurately convey the experiences of racially marked people. In this sense, art critic Abiola Sinclair's reading of Parks's experimental aesthetic as a traitorous concession to a white theatrical tradition was unexceptional; it was a reminder of the historical efforts of African American artists to create distinctly black art.
A Stefan model for mass transfer in a rotating disk reaction vessel
Authors: BOHUN C. S.
Published: May 2015

In this paper, we focus on the process of mass transfer in the rotating disk apparatus formulated as a Stefan problem with consideration given to both the hydrodynamics of the process and the specific chemical reactions occurring in the bulk. The wide range in the reaction rates of the underlying chemistry allows for a natural decoupling of the problem into a simplified set of weakly coupled convective–reaction–diffusion equations for the slowly reacting chemical species and a set of algebraic relations for the species that react rapidly. An analysis of the chemical equilibrium conditions identifies an expansion parameter and a reduced model that remains valid for arbitrarily large times. Numerical solutions of the model are compared to an asymptotic analysis revealing three distinct time scales and chemical diffusion boundary layer that lies completely inside the hydrodynamic layer. Formulated as a Stefan problem, the model generalizes the work of Levich (Levich and Spalding (1962) Physicochemical hydrodynamics, vol. 689, Prentice-Hall Englewood Cliffs, NJ) and will help better understand the natural limitations of the rotating disk reaction vessel when consideration is made for the reacting chemical species.
U.S. Goals for Arctic Council Include Focus on Climate Change
Authors: Showstack Randy
Published: May 2015

As chair of the Arctic Council, the United States is prioritizing climate change and ocean issues and improving the conditions for Arctic communities.
DRAM-3 modulates autophagy and promotes cell survival in the absence of glucose
Authors: Mrschtik M , O'Prey J , Lao L Y , Long J S , Beaumatin F , Strachan D , O'Prey M , Skommer J , Ryan K M
Published: May 2015

Macroautophagy is a membrane-trafficking process that delivers cytoplasmic constituents to lysosomes for degradation. The process operates under basal conditions as a mechanism to turnover damaged or misfolded proteins and organelles. As a result, it has a major role in preserving cellular integrity and viability. In addition to this basal function, macroautophagy can also be modulated in response to various forms of cellular stress, and the rate and cargoes of macroautophagy can be tailored to facilitate appropriate cellular responses in particular situations. The macroautophagy machinery is regulated by a group of evolutionarily conserved autophagy-related (ATG) proteins and by several other autophagy regulators, which either have tissue-restricted expression or operate in specific contexts. We report here the characterization of a novel autophagy regulator that we have termed DRAM-3 due to its significant homology to damage-regulated autophagy modulator (DRAM-1). DRAM-3 is expressed in a broad spectrum of normal tissues and tumor cells, but different from DRAM-1, DRAM-3 is not induced by p53 or DNA-damaging agents. Immunofluorescence studies revealed that DRAM-3 localizes to lysosomes/autolysosomes, endosomes and the plasma membrane, but not the endoplasmic reticulum, phagophores, autophagosomes or Golgi, indicating significant overlap with DRAM-1 localization and with organelles associated with macroautophagy. In this regard, we further proceed to show that DRAM-3 expression causes accumulation of autophagosomes under basal conditions and enhances autophagic flux. Reciprocally, CRISPR/Cas9-mediated disruption of DRAM-3 impairs autophagic flux confirming that DRAM-3 is a modulator of macroautophagy. As macroautophagy can be cytoprotective under starvation conditions, we also tested whether DRAM-3 could promote survival on nutrient deprivation. This revealed that DRAM-3 can repress cell death and promote long-term clonogenic survival of cells grown in the absence of glucose. Interestingly, however, this effect is macroautophagy-independent. In summary, these findings constitute the primary characterization of DRAM-3 as a modulator of both macroautophagy and cell survival under starvation conditions.
Contrasting taxonomic stratification of microbial communities in two hypersaline meromictic lakes
Authors: Andrei Adrian-Ştefan , Robeson Michael S , Baricz Andreea , Coman Cristian , Muntean Vasile , Ionescu Artur , Etiope Giuseppe , Alexe Mircea , Sicora Cosmin Ionel , Podar Mircea , Banciu Horia Leonard
Published: May 2015

Hypersaline meromictic lakes are extreme environments in which water stratification is associated with powerful physicochemical gradients and high salt concentrations. Furthermore, their physical stability coupled with vertical water column partitioning makes them important research model systems in microbial niche differentiation and biogeochemical cycling. Here, we compare the prokaryotic assemblages from Ursu and Fara Fund hypersaline meromictic lakes (Transylvanian Basin, Romania) in relation to their limnological factors and infer their role in elemental cycling by matching taxa to known taxon-specific biogeochemical functions. To assess the composition and structure of prokaryotic communities and the environmental factors that structure them, deep-coverage small subunit (SSU) ribosomal RNA (rDNA) amplicon sequencing, community domain-specific quantitative PCR and physicochemical analyses were performed on samples collected along depth profiles. The analyses showed that the lakes harbored multiple and diverse prokaryotic communities whose distribution mirrored the water stratification patterns. Ursu Lake was found to be dominated by Bacteria and to have a greater prokaryotic diversity than Fara Fund Lake that harbored an increased cell density and was populated mostly by Archaea within oxic strata. In spite of their contrasting diversity, the microbial populations indigenous to each lake pointed to similar physiological functions within carbon degradation and sulfate reduction. Furthermore, the taxonomy results coupled with methane detection and its stable C isotope composition indicated the presence of a yet-undescribed methanogenic group in the lakes’ hypersaline monimolimnion. In addition, ultrasmall uncultivated archaeal lineages were detected in the chemocline of Fara Fund Lake, where the recently proposed Nanohaloarchaeota phylum was found to thrive.
Protein synthesis in artificial cells: using compartmentalisation for spatial organisation in vesicle bioreactors
Authors: Elani Yuval , Law Robert V. , Ces Oscar
Published: May 2015

Spatially segregated in vitro protein expression in a vesicle-based artificial cell, with different proteins synthesised in defined vesicle regions.
A microfabricated magnetic actuation device for mechanical conditioning of arrays of 3D microtissues
Authors: Xu Fan , Zhao Ruogang , Liu Alan S. , Metz Tristin , Shi Yu , Bose Prasenjit , Reich Daniel H.
Published: May 2015

We developed an approach to magnetically actuate arrays of microtissue constructs for biomechanical measurements and long-term mechanical stimulation.
A microfluidic immunoassay platform for the detection of free prostate specific antigen: a systematic and quantitative approach
Authors: Madaboosi Narayanan , Soares Ruben R. G. , Chu Virginia , Conde João Pedro
Published: May 2015

A novel physisorption- and bio-affinity amplification-based microfluidic immunoassay platform for free PSA detection within a clinically relevant range is reported.
Facile synthesis of boron- and nitride-doped MoS2 nanosheets as fluorescent probes for the ultrafast, sensitive, and label-free detection of Hg2+
Authors: Liu Xiaojia , Li Liping , Wei Yuanjie , Zheng Yizhi , Xiao Qian , Feng Bo
Published: May 2015

Bulk MoS2, a prototypical transition metal chalcogenide material, is an indirect band gap semiconductor with negligible photoluminescence.
Optimization and validation of HRLC-MS method to identify and quantify triacylglycerol molecular species in human milk
Authors: Kim Kyeong-Mu , Park Tae-Sik , Shim Soon-Mi
Published: May 2015

Study of the determination of triacylglycerols (TAG) molecular species in human milk is necessary for understanding the absorption of human milk fat as well as designing milk fats for infant formulas.
Oxocentered Cu(ii) lead selenite honeycomb lattices hosting Cu(i)Cl2groups obtained by chemical vapor transport reactions
Authors: Kovrugin Vadim M. , Colmont Marie , Siidra Oleg I. , Mentré Olivier , Al-Shuray Alexander , Gurzhiy Vladislav V. , Krivovichev Sergey V.
Published: May 2015

Three different mixed Cu(i)–Cu(ii) Pb selenite chlorides obtained using chemical vapor transport reactions are based up metal-oxide selenite honeycomb layers.
Detection of microRNA SNPs with ultrahigh specificity by using reduced graphene oxide-assisted rolling circle amplification
Authors: Zhu Xiaoli , Shen Yalan , Cao Jiepei , Yin Li , Ban Fangfang , Shu Yongqian , Li Genxi
Published: May 2015

By adopting reduced graphene oxide into a rolling cycle amplification system, we find that the specificity can be greatly improved, which would contribute to the accurate identification of miRNA SNPs.
Thioamides in the collagen triple helix
Authors: Newberry Robert W. , VanVeller Brett , Raines Ronald T.
Published: May 2015

To probe noncovalent interactions within the collagen triple helix, backbone amides were replaced with a thioamide isostere.
Decarboxylative Reissert type trifluoro- and trichloro-methylation of (iso)quinoline derivatives in batch and continuous flow
Authors: Therkelsen M. , Rasmussen M. T. , Lindhardt A. T.
Published: May 2015

Copper-free decarboxylative trifluoro- and trichloromethylation of isoquinoline and quinoline derivatives through Reissert type reactions in batch and telescoped continuous flow.
Synergistic Cu–amine catalysis for the enantioselective synthesis of chiral cyclohexenones
Authors: Quintard A. , Rodriguez J.
Published: May 2015

An unprecedented utilization of 1,3-acetonedicarboxylic acid as a 1,3-bis-pro-nucleophile and a reactive acetone surrogate in enantioselective catalysis has been reported.
Crystallization and characterization of cocrystals of piroxicam and 2,5-dihydroxybenzoic acid
Authors: Horstman E. M. , Bertke J. A. , Kim E. H. , Gonzalez L. C. , Zhang G. G. Z. , Gong Y. , Kenis P. J. A.
Published: May 2015

Two cocrystals of piroxicam (PRX) and 2,5-dihydroxybenzoic acid (HBA) were found using a microfluidic cocrystal screening approach; one crystal contained an acetone (ACT) impurity.
Compositionally controlled band gap and photoluminescence of ZnSSe nanofibers by electrospinning
Authors: Chen Lin-Jer , Lee Chia-Rong , Chuang Yu-Ju , Wu Zhao-Han , Chen Chienyi
Published: May 2015

A simple, non-toxic, low-priced, and reproducible manipulation, which meets the standards of green chemistry, is introduced for the synthesis of ZnSxSe1−x nanofibers. ZnSxSe1−x nanofibers have been prepared in the entire composition range from ZnSe to ZnS by using a low-cost wet-chemical method.
Thermodynamic, energetic, and topological properties of crystal packing of pyrazolo[1,5-a]pyrimidines governed by weak electrostatic intermolecular interactions
Authors: Frizzo Clarissa P. , Tier Aniele Z. , Gindri Izabelle M. , Meyer Alexandre R. , Black Gabrielle , Belladona Andrei L. , Martins Marcos A. P.
Published: May 2015

The relationship between energetic and topological properties of crystals with weak electrostatic intermolecular interactions and thermodynamic data are presented.
Heat-induced spinodal decomposition of Ag–Cu nanoparticles
Authors: Sopoušek Jiří , Zobač Ondřej , Buršík Jiří , Roupcová Pavla , Vykoukal Vít , Brož Pavel , Pinkas Jiří , Vřešt'ál Jan
Published: May 2015

The predicted spinodal decomposition of metastable Ag–Cu nanoparticles was experimentally induced (and detected) by heating on an high temperature X-ray diffractometer (HT XRD).
Time-resolved IR spectroscopy of a trinuclear palladium complex in solution
Authors: Zimmer M. , Rupp F. , Singer P. , Walz F. , Breher F. , Klopper W. , Diller R. , Gerhards M.
Published: May 2015

Time-resolved IR spectroscopic methods covering the femto- to microsecond range in combination with (TD-)DFT computations were used to investigate the electronically excited state structure of a trinuclear Pd complex.
Facile preparation of a photoactivatable surface on a 96-well plate: a versatile and multiplex cell migration assay platform
Authors: Kamimura Masao , Scheideler Olivia , Shimizu Yoshihisa , Yamamoto Shota , Yamaguchi Kazuo , Nakanishi Jun
Published: May 2015

A novel photoactivatable 96-well plate based on photocleavable PEG and poly-d-lysine serves as a useful high-throughput cell migration assay platform.
Spectroscopic evidence for selenium(iv) dimerization in aqueous solution
Authors: Kretzschmar J. , Jordan N. , Brendler E. , Tsushima S. , Franzen C. , Foerstendorf H. , Stockmann M. , Heim K. , Brendler V.
Published: May 2015

MP2 predicted IR spectra of different aqueous Se(iv) species revealed features characteristic of the hydrogen selenite dimer, (HSeO3)22−. IR experiments, supported by77Se NMR spectra, evidenced the existence of this dimeric species.
Intramolecular pyridine-based frustrated Lewis-pairs
Authors: Körte Leif A. , Warner Robin , Vishnevskiy Yury V. , Neumann Beate , Stammler Hans-Georg , Mitzel Norbert W.
Published: May 2015

Besides a series of pyridine-based Lewis pairs with B(C6F5)2 groups with varying electronic and steric situations and strong intramolecular B–N bonds, 2-[(CH2)4B(C6F5)2]-6-tBu-pyridine was found to behave as a frustrated Lewis pair.
Enhanced photocatalytic hydrogen evolution efficiency using hollow microspheres of (CuIn)xZn2(1−x)S2 solid solutions
Authors: Huang Yu , Chen Jun , Zou Wei , Zhang Linxing , Hu Lei , Yu Ranbo , Deng Jinxia , Xing Xianran
Published: May 2015

Hollow spheres of multicomponent (CuIn)xZn2(1−x)S2 solid solutions have been rapidly synthesized, which exhibit excellent photocatalytic activity.
Through the years with on-a-chip gas chromatography: a review
Authors: Haghighi F. , Talebpour Z. , Sanati-Nezhad A.
Published: May 2015

In recent years, the need for measurement and detection of samples in situ or with very small volume and low concentration (low and sub-parts per billion) is a cause for miniaturizing systems via microelectromechanical system (MEMS) technology.
Enhanced formaldehyde sensing properties of SnO2 nanorods coupled with Zn2SnO4
Authors: Xiao Xuechun , Xing Xinxin , Han Bingqian , Deng Dongyang , Cai Xiaoyan , Wang Yude
Published: May 2015

The formaldehyde sensing properties of a SnO2 nanorod gas sensor are improved by compositing with Zn2SnO4.
Development and validation of a gas chromatography-mass spectrometry method for determination of sterol oxidation products in edible oils
Authors: Hu Yinzhou , Yang Guoliang , Huang Weisu , Lai Shiyun , Ren Yiping , Huang Baifen , Zhang Liangxiao , Li Peiwu , Lu Baiyi
Published: May 2015

An efficient GC-MS method for determination of sterol oxidation product profiles in edible oils was established by combination with optimized silylation, and validated using the standards of sitosterol oxidation products.
Raman scattering and interstitial Li defects induced polarization in co-doped multiferroic Zn0.96-yCo0.04LiyO (0.00 ≤ y ≤ 0.10) nanoparticles
Authors: Awan Saif Ullah , Hasanain S. K. , Awan M. S. , Shah Saqlain A.
Published: May 2015

Structural and Raman analysis confirmed a single phase wurtzite hexagonal crystalline structure of Li–Co co-doped ZnO nanoparticles.
Plant root nodule like nickel-oxide–multi-walled carbon nanotube composites for non-enzymatic glucose sensors
Authors: Prasad Raghavendra , Gorjizadeh Narjes , Rajarao Ravindra , Sahajwalla Veena , Bhat Badekai Ramachandra
Published: May 2015

Herein, in this work we synthesized plant root nodule like NiO–MWCNT nanocomposites by a simple, rapid and solvent-free method using nickel formate as a precursor.
Enhanced high rate performance of Li[Li0.17Ni0.2Co0.05Mn0.58−xAlx]O2−0.5x cathode material for lithium-ion batteries
Authors: Wang Y. L. , Huang X. , Li F. , Cao J. S. , Ye S. H.
Published: May 2015

Pristine LNCM and LNCMA as Li-rich cathode materials for lithium ion batteries were synthesized via a sol–gel route. The Al-substituted LNCM sample exhibits an enhanced high rate performance and superior cyclability.
Adsorption of imidazolium-based ionic liquids with different chemical structures onto various resins from aqueous solutions
Authors: Li Luyang , Wang Yu , Qi Xinhua
Published: May 2015

The adsorption behavior of a series of imidazolium-based ionic liquids with different chemical structures onto various resins was investigated.
Dual stimulus responsive drug release under the interaction of pH value and pulsatile electric field for a bacterial cellulose/sodium alginate/multi-walled carbon nanotube hybrid hydrogel
Authors: Shi Xiangning , Zheng Yudong , Wang Cai , Yue Lina , Qiao Kun , Wang Guojie , Wang Luning , Quan Haiyu
Published: May 2015

Hydrogels synthesized by SA, BC and MWCNTs was a pH and electric responsive drug delivery system. The combination stimuli-releasing had selectivity for the pH value. Pulsatile releasing pattern was also had selectivity for the pH value.
Thermoresponsive polymer coated gold nanoparticles: from MADIX/RAFT copolymerization of N-vinylpyrrolidone and N-vinylcaprolactam to salt and temperature induced nanoparticle aggregation
Authors: Maji Samarendra , Zhang Zhiyue , Voorhaar Lenny , Pieters Sophie , Stubbe Birgit , Van Vlierberghe Sandra , Dubruel Peter , De Geest Bruno G. , Hoogenboom Richard
Published: May 2015

In the present contribution, we report the synthesis of thermoresponsive homo and statistical copolymers of N-vinylcaprolactam and N-vinylpyrrolidone and the corresponding responsive gold nanoparticles.
Carbon-doped porous boron nitride: metal-free adsorbents for sulfur removal from fuels
Authors: Xiong Jun , Zhu Wenshuai , Li Hongping , Yang Lei , Chao Yanhong , Wu Peiwen , Xun Suhang , Jiang Wei , Zhang Ming , Li Huaming
Published: May 2015

Novel carbon-doped porous boron nitride has been successfully prepared by using [Bmim]BF4as a soft template and the carbon source. The metal-free porous C-BN displayed one of the highest adsorption capacities for dibenzothiophene reported up to now.
Organic bioelectronics in infection
Authors: Löffler Susanne , Libberton Ben , Richter-Dahlfors Agneta
Published: May 2015

Organic bioelectronics for dynamic modulation of normal and infected tissue microenvironments, and the development towards fully automated cell culture systems.
Drug-Induced Movement Disorders
Authors: Lustig Amy , Ruiz Cesar
Published: May 2015

The purpose of this article is to present a general overview of the features of drug-induced movement disorders (DIMDs) comprised by Parkinsonism and extrapyramidal symptoms. Speech-language pathologists (SLPs) who work with patients presenting with these issues must have a broad understanding of the underlying disease process. This article will provide a brief introduction to the neuropathophysiology of DIMDs, a discussion of the associated symptomatology, the pharmacology implicated in causing DIMDs, and the medical management approaches currently in use.
Discrete Fourier transform spreading‐based generalised frequency division multiplexing
Authors: Das S. S. , Tiwari S.
Published: May 2015

Generalised frequency division multiplexing (GFDM) has gained significant importance as a contender for the fifth generation (5G) air interface. The peak‐to‐average power ratio (PAPR) of GFDM is high due to the use of a same pulse shaping filter per subcarrier and the addition of different subcarriers at the transmitter. Proposed is the use of discrete Fourier transform (DFT) spreading‐based GFDM transmission to reduce the PAPR. It is found that DFT spreading helps to reduce the PAPR of GFDM significantly. It is also seen that the bit error rate performance, which is computed through simulation and using an analytical expression of the signal‐to‐interference‐plus noise ratio, is not compromised by DFT spreading but rather is improved in the frequency selective fading channel.
Logarithmic STDM watermarking using visual saliency‐based JND model
Authors: Wan Wenbo , Liu Ju , Sun Jiande , Ge Chuan , Nie Xiushan
Published: May 2015

Owing to the validity of measuring the visual visibility for image distortion, just noticeable distortion (JND) has been widely used in the quantisation‐based watermarking framework. However, the existing JND model treats every region in the image with an equal attention level. Visual saliency, which reflects the visual attention, is proposed to improve the perceptual JND model. Based on the improved model, a logarithmic spread transform dither modulation (STDM) watermarking scheme is proposed. Simulations show that the proposed watermarking scheme with the improved JND model has superior robustness compared with existing STDM schemes.
Suppressed back‐lobe substrate‐integrated waveguide slot array antenna for X‐band
Authors: Karami M. , Sadeghzadeh R.A. , Noferesti M. , Chegeni M.
Published: May 2015

Utilising an array that is constructed by combining short‐ended stubs and microstrip lines, a planar‐choke structure is presented. By locating the proposed chock structure on the bottom of the substrate‐integrated waveguide slot array antenna, undesired spillover current and edge diffractions are removed. Measurement result show that in the operational bandwidth the backward radiation is reduced by more than 20 dB and the side‐lobe level is improved by 5 dB without degrading of the antenna's electrical performance.
Effect of γ-ray irradiation on the sorption of hydrogen by nanoporous carbon materials
Authors: Dolbin A. V. , Manzhelii V. G. , Esel'son V. B. , Gavrilko V. G. , Vinnikov N. A. , Basnukaeva R. M. , Khlistyuck M. V. , Maletskii V. P. , Nikolaev V. G. , Kudriachenko E. V. , Uvarova I. Yu. , Tripachko N. A. , Koda V. Yu.
Published: May 2015

The effects of radiation exposure in a hydrogen atmosphere on hydrogen sorption by a synthetic porous carbon nanosorbent, SCN (spherical carbonite saturated). The exposure was created by γ-rays from cobalt-60 (photon energy 1.2 MeV, irradiation dose 4.8 × 107 rad) in a normal hydrogen atmosphere at a pressure of 1 atm and a temperature of 300 K. The processes of hydrogen sorption-desorption by SCN samples before and after irradiation were studied in a temperature interval of 15–1173 K. It was found that the irradiation of SCN in a hydrogen atmosphere significantly increased the amount hydrogen sorbed in the sample. We conducted a comparison with the results of earlier studies investigating the influence of irradiation on the sorption of hydrogen by single-walled carbon nanotubes. The amount of physically sorbed hydrogen in the synthetic SCN sorbent that was irradiated in the hydrogen atmosphere, is four times greater than the amount of hydrogen that was physically sorbed by the single-walled carbon nanotubes that were irradiated under similar conditions. At a temperature below 25 K, the hydrogen diffusion in the SCN was almost temperature independent for the porous subsystem with the highest diffusion coefficients, which is typical for cases when the tunnel diffusion mechanism dominates the thermodynamic mechanism.
Magneto-optical Kerr effect characterization of electrodeposited Y-junction magnetic nanostructures
Authors: Pathak Sachin , Hong Jongill , Chaudhary Jai , Sharma Manish
Published: May 2015

Magneto-optical Kerr effect (MOKE) is used to investigate 1-D arrays of hexagonally arranged Co Y-junction nanostructures embedded in Anodic aluminium oxide (AAO) templates. MOKE in reflection mode clearly distinguishes the magnetic response on the front and back sides of two magnetic samples, i.e., in the form of solid nanowires and as hollow nanotubes. MOKE, being a surface sensitive technique, clearly shows the effect of magnetic interactions and density on magnetization reversal measurements. The experimental measurements complement well with the simulation results using MAGPAR. Simulations suggest the formation of closed vortex state in hollow nanotubes prominently and are found to be consistent with the MOKE measurements. Our approach also clearly shows that it is possible to study and model the exact profile of the Y-shaped nanowires. Their magnetization state is important and will have a significant impact on the overall magnetization as well as the switching behaviour of the nanowires.
A new approach to calculate charge carrier transport mobility in organic molecular crystals from imaginary time path integral simulations
Authors: Song Linze , Shi Qiang
Published: May 2015

We present a new non-perturbative method to calculate the charge carrier mobility using the imaginary time path integral approach, which is based on the Kubo formula for the conductivity, and a saddle point approximation to perform the analytic continuation. The new method is first tested using a benchmark calculation from the numerical exact hierarchical equations of motion method. Imaginary time path integral Monte Carlo simulations are then performed to explore the temperature dependence of charge carrier delocalization and mobility in organic molecular crystals (OMCs) within the Holstein and Holstein-Peierls models. The effects of nonlocal electron-phonon interaction on mobility in different charge transport regimes are also investigated.
Forces and stress in second order Møller-Plesset perturbation theory for condensed phase systems within the resolution-of-identity Gaussian and plane waves approach
Authors: Del Ben Mauro , Hutter Jürg , VandeVondele Joost
Published: May 2015

The forces acting on the atoms as well as the stress tensor are crucial ingredients for calculating the structural and dynamical properties of systems in the condensed phase. Here, these derivatives of the total energy are evaluated for the second-order Møller-Plesset perturbation energy (MP2) in the framework of the resolution of identity Gaussian and plane waves method, in a way that is fully consistent with how the total energy is computed. This consistency is non-trivial, given the different ways employed to compute Coulomb, exchange, and canonical four center integrals, and allows, for example, for energy conserving dynamics in various ensembles. Based on this formalism, a massively parallel algorithm has been developed for finite and extended system. The designed parallel algorithm displays, with respect to the system size, cubic, quartic, and quintic requirements, respectively, for the memory, communication, and computation. All these requirements are reduced with an increasing number of processes, and the measured performance shows excellent parallel scalability and efficiency up to thousands of nodes. Additionally, the computationally more demanding quintic scaling steps can be accelerated by employing graphics processing units (GPU’s) showing, for large systems, a gain of almost a factor two compared to the standard central processing unit-only case. In this way, the evaluation of the derivatives of the RI-MP2 energy can be performed within a few minutes for systems containing hundreds of atoms and thousands of basis functions. With good time to solution, the implementation thus opens the possibility to perform molecular dynamics (MD) simulations in various ensembles (microcanonical ensemble and isobaric-isothermal ensemble) at the MP2 level of theory. Geometry optimization, full cell relaxation, and energy conserving MD simulations have been performed for a variety of molecular crystals including NH3, CO2, formic acid, and benzene.
Energy transfer dynamics in trimers and aggregates of light-harvesting complex II probed by 2D electronic spectroscopy
Authors: Enriquez Miriam M. , Akhtar Parveen , Zhang Cheng , Garab Győző , Lambrev Petar H. , Tan Howe-Siang
Published: May 2015

The pathways and dynamics of excitation energy transfer between the chlorophyll (Chl) domains in solubilized trimeric and aggregated light-harvesting complex II (LHCII) are examined using two-dimensional electronic spectroscopy (2DES). The LHCII trimers and aggregates exhibit the unquenched and quenched excitonic states of Chl a, respectively. 2DES allows direct correlation of excitation and emission energies of coupled states over population time delays, hence enabling mapping of the energy flow between Chls. By the excitation of the entire Chl b Qy band, energy transfer from Chl b to Chl a states is monitored in the LHCII trimers and aggregates. Global analysis of the two-dimensional (2D) spectra reveals that energy transfer from Chl b to Chl a occurs on fast and slow time scales of 240–270 fs and 2.8 ps for both forms of LHCII. 2D decay-associated spectra resulting from the global analysis identify the correlation between Chl states involved in the energy transfer and decay at a given lifetime. The contribution of singlet–singlet annihilation on the kinetics of Chl energy transfer and decay is also modelled and discussed. The results show a marked change in the energy transfer kinetics in the time range of a few picoseconds. Owing to slow energy equilibration processes, long-lived intermediate Chl a states are present in solubilized trimers, while in aggregates, the population decay of these excited states is significantly accelerated, suggesting that, overall, the energy transfer within the LHCII complexes is faster in the aggregated state.
Alternating current magnetic susceptibility and heat dissipation by Mn1−xZnxFe2O4 nanoparticles for hyperthermia treatment
Authors: Kondo T. , Mori K. , Hachisu M. , Yamazaki T. , Okamoto D. , Watanabe M. , Gonda K. , Tada H. , Hamada Y. , Takano M. , Ohuchi N. , Ichiyanagi Y.
Published: May 2015

Mn-Zn ferrite, Mn1−xZnxFe2O4 nanoparticles encapsulated in amorphous SiO2 were prepared using our original wet chemical method. X-ray diffraction patterns confirmed that the diameters of these particles were within 7–30 nm. Magnetization measurements for various sample compositions revealed that the saturation magnetization (Ms) of 7 nm particles was maximum for the x = 0.2 sample. AC magnetic susceptibility measurements were performed for Mn0.8Zn0.2Fe2O4 (x = 0.2) samples with 13–30 nm particles. The peak of the imaginary part of the magnetic susceptibility χ″ shifted to higher temperatures as the particle size increased. An AC field was found to cause the increase in temperature, with the 18 nm particles exhibiting the highest temperature increase, as expected. In addition, in vitro experiments were carried out to study the hyperthermia effects of Mn1−xZnxFe2O4 (x = 0.2, 18 nm) particles on human cancer cells.
Parametric design of tri-axial nested Helmholtz coils
Authors: Abbott Jake J.
Published: May 2015

This paper provides an optimal parametric design for tri-axial nested Helmholtz coils, which are used to generate a uniform magnetic field with controllable magnitude and direction. Circular and square coils, both with square cross section, are considered. Practical considerations such as wire selection, wire-wrapping efficiency, wire bending radius, choice of power supply, and inductance and time response are included. Using the equations provided, a designer can quickly create an optimal set of custom coils to generate a specified field magnitude in the uniform-field region while maintaining specified accessibility to the central workspace. An example case study is included.
High-temperature fiber-optic Fabry-Perot interferometric sensors
Authors: Ding Wenhui , Jiang Yi , Gao Ran , Liu Yuewu
Published: May 2015

A photonic crystal fiber (PCF) based high-temperature fiber-optic sensor is proposed and experimentally demonstrated. The sensor head is a Fabry-Perot cavity manufactured with a short section of endless single-mode photonic crystal fiber (ESM PCF). The interferometric spectrum of the Fabry-Perot interferometer is collected by a charge coupled device linear array based micro spectrometer. A high-resolution demodulation algorithm is used to interrogate the peak wavelengths. Experimental results show that the temperature range of 1200 °C and the temperature resolution of 1 °C are achieved.