bluuebunny/crossref_metadata_2025 huggingface dataset:
Mass transfer and convection effects in small-scale catalytic hydrogenation
Authors: Luo Jingwei , Wu Yang , Zijlstra Harmen S. , Harrington David A. , McIndoe J. Scott
Published: May 2017

The reaction rate of rhodium-catalyzed hydrogenation of alkynes was shown to be strongly influenced by the transfer of the hydrogen gas into the solution and stirring in the solution.
Mechanistic insights into the light-driven hydrogen evolution reaction from formic acid mediated by an iridium photocatalyst
Authors: Xiao Pin , Wu Dan , Fang Wei-Hai , Cui Ganglong
Published: May 2017

Electronic structure calculations shed important mechanistic light on light-driven hydrogen evolution from formic acid mediated by an iridium photocatalyst.
trans–cis C–Pd–C rearrangement in hemichelates
Authors: Werlé Christophe , Dohm Sebastian , Bailly Corinne , Karmazin Lydia , Ricard Louis , Sieffert Nicolas , Pfeffer Michel , Hansen Andreas , Grimme Stefan , Djukic Jean-Pierre
Published: May 2017

In the transition state of thetrans–cisisomerization process, hemichelation dynamically offers alternative coordination positions to the Pd center.
A porous two-dimensional Zn(ii)-coordination polymer exhibiting SC–SC transmetalation with Cu(ii): efficient heterogeneous catalysis for the Henry reaction and detection of nitro explosives
Authors: Gupta Mayank , De Dinesh , Pal Sanchari , Pal Tapan K. , Tomar Kapil
Published: May 2017

The 2D Zn(ii)-CP, 1Zn and its Cu-analogue 1Cu exhibit efficient catalytic activity for the Henry reaction. 1Zn can be utilized for detecting trace amounts of nitro explosives in DMSO.
ILs through the looking glass: electrostatics and structure probed using charge-inverted ionic liquid pairs
Authors: Cruz Tiago F. C. , Shimizu Karina , Esperança José M. S. S. , Rebelo Luís Paulo N. , Gomes Pedro T. , Canongia Lopes José N.
Published: May 2017

Ionic liquids combining potassium cations with 1-alkyl-3-methylcyclopentadienyl anions, K[CnC1Cp] (n = 4 and 6) have been synthesized.
The effect of STM parameters on tip-enhanced Raman spectra
Authors: Sabanés Natalia Martín , Elizabeth Amala , Pfisterer Jonas H. K. , Domke Katrin F.
Published: May 2017

In this work, we evaluate the dependence of tip-enhanced Raman (TER) spectra of a monolayer of thiophenol at a Au(111) electrode on the scanning tunneling microscope’s tunneling current set-point and bias voltage parameters. We find an increase of the TER intensity upon set-point increase or bias decrease as expected from a gap-distance reduction. The relations obtained follow a theoretical model considering a simple gap-distance change when tuning the mentioned parameters. We find that the value of the bias voltage affects the TER intensity to a larger extent than the current set-point. Therefore it is advisable to work in a low-bias regime when aiming for ultrasensitive TER measurements.
Increasing global access to the high-volume HIV drug nevirapine through process intensification
Authors: Verghese Jenson , Kong Caleb J. , Rivalti Daniel , Yu Eric C. , Krack Rudy , Alcázar Jesus , Manley Julie B. , McQuade D. Tyler , Ahmad Saeed , Belecki Katherine , Gupton B. Frank
Published: May 2017

Fundamental elements of process intensification were applied to generate efficient batch and continuous syntheses of the high-volume HIV drug nevirapine.
Metal-free synthesis of ketones by visible-light induced aerobic oxidative radical addition of aryl hydrazines to alkenes
Authors: Ding Ya , Zhang Wenkai , Li Hao , Meng Yunge , Zhang Te , Chen Qiu-Yun , Zhu Chunyin
Published: May 2017

A green and cost-effective method has been developed for the conversion of alkenes to ketones under metal-free conditions.
Correction: Optofluidic time-stretch imaging – an emerging tool for high-throughput imaging flow cytometry
Authors: Lau Andy K. S. , Shum Ho Cheung , Wong Kenneth K. Y. , Tsia Kevin K.
Published: May 2017

Correction for ‘Optofluidic time-stretch imaging – an emerging tool for high-throughput imaging flow cytometry’ by Andy K. S. Lau et al., Lab Chip, 2016, 16, 1743–1756.
Are highly morphed peptide frameworks lurking silently in microbial genomes valuable as next generation antibiotic scaffolds?
Authors: Walsh Christopher T.
Published: May 2017

Antibiotics are a therapeutic class that, once deployed, select for resistant bacterial pathogens and so shorten their useful life cycles.
Towards higher electron mobility in modulation doped GaAs/AlGaAs core shell nanowires
Authors: Boland Jessica L. , Tütüncüoglu Gözde , Gong Juliane Q. , Conesa-Boj Sonia , Davies Christopher L. , Herz Laura M. , Fontcuberta i Morral Anna , Johnston Michael B.
Published: May 2017

Precise control over the electrical conductivity of semiconductor nanowires is a crucial prerequisite for implementation into novel electronic and optoelectronic devices.
Macrocyclic peptide inhibitors for the protein–protein interaction of Zaire Ebola virus protein 24 and karyopherin alpha 5
Authors: Song Xiao , Lu Lu-yi , Passioura Toby , Suga Hiroaki
Published: May 2017

Describes the identification of macrocyclic peptide inhibitors of the ebola VP24 protein–karyopherin alpha 5 protein–protein interaction with nanomolar affinity for VP24.
Imprinted micelles for chiral recognition in water: shape, depth, and number of recognition sites
Authors: Awino Joseph K. , Zhao Yan
Published: May 2017

Molecular imprinting within cross-linked micelles yielded chiral receptors with excellent enantio- and diastereoselectivity for amino acid derivatives.
Control of the hierarchical assembly of π-conjugated optoelectronic peptides by pH and flow
Authors: Mansbach Rachael A. , Ferguson Andrew L.
Published: May 2017

Coarse-grained molecular simulations reveal the influence of pH and flow on the self-assembly of DFAG-OPV3-GAFD optoelectronic peptides.
A sialosyl sulfonate as a potent inhibitor of influenza virus replication
Authors: Hadházi Ádám , Pascolutti Mauro , Bailly Benjamin , Dyason Jeffrey C. , Borbás Anikó , Thomson Robin J. , von Itzstein Mark
Published: May 2017

A 2-deoxy-sialosyl sulfonate, synthesised in just four steps from sialic acid, is >500-fold more potent against influenza virus sialidase activity and cell infection than its carboxylate isostere.
Strained alkynes derived from 2,2′-dihydroxy-1,1′-biaryls; synthesis and copper-free cycloaddition with azides
Authors: Del Grosso Alessandro , Galanopoulos Lavrentis-Dimitrios , Chiu Cookson K. C. , Clarkson Guy J. , O′ Connor Peter B. , Wills Martin
Published: May 2017

A series of strained alkynes were prepared from 2,2′-dihydroxy-biaryls, and were demonstrated to react with azides without a copper catalyst.
Antimicrobial peptide-inspired NH125 analogues: bacterial and fungal biofilm-eradicating agents and rapid killers of MRSA persisters
Authors: Basak Akash , Abouelhassan Yasmeen , Zuo Ran , Yousaf Hussain , Ding Yousong , Huigens Robert W.
Published: May 2017

A novel series of 30 NH125 analogues leads to improved biofilm-eradicating agents that rapidly kill MRSA persister cells.
Photoresponsive AA/BB supramolecular polymers comprising stiff-stilbene based guests and bispillar[5]arenes
Authors: Wang Yuan , Sun Cai-Li , Niu Li-Ya , Wu Li-Zhu , Tung Chen-Ho , Chen Yu-Zhe , Yang Qing-Zheng
Published: May 2017

We report a novel photoresponsive AA/BB supramolecular polymer comprising stiff-stilbene bridged guests and disulfide-bridged bispillar[5]arenes.
Main chain copolysiloxanes with terthiophene and perylenediimide units: synthesis, characterization and electrical memory
Authors: Chen Zhen , Zhang Tingjie , Zhang Yi , Ren Zhongjie , Zhang Jianming , Yan Shouke
Published: May 2017

A main chain donor–acceptor copolysiloxane PBIClSi-alt-PTSi for resistor type memory has been designed and synthesized. The PBIClSi-alt-PTSi possesses high thermal stability and shows nonvolatile write-once-read many times (WORM) memory characteristics.
New copper(i) complex based initiating systems in redox polymerization and comparison with the amine/benzoyl peroxide reference
Authors: Garra P. , Kermagoret A. , Al Mousawi A. , Dumur F. , Gigmes D. , Morlet-Savary F. , Dietlin C. , Fouassier J. P. , Lalevée J.
Published: May 2017

Novel copper complex based initiating systems for redox free radical polymerization (FRP) of methacrylate resins under mild conditions are proposed.
A photoacid generator integrated terpolymer for electron beam lithography applications: sensitive resist with pattern transfer potential
Authors: Nandi Santu , Yogesh Midathala , Reddy Pulikanti Guruprasad , Sharma Satinder K. , Pradeep Chullikkattil P. , Ghosh Subrata , Gonsalves Kenneth E.
Published: May 2017

A new PAG integrated electron beam active terpolymer resist has been developed for high resolution pattern transfer applications.
A molecular electron density theory study of the [3 + 2] cycloaddition reaction of nitrones with strained allenes
Authors: Domingo Luis R. , Ríos-Gutiérrez Mar , Pérez Patricia
Published: May 2017

The molecular electron density theory study of this [3 + 2] cycloaddition reveals that the strain present in the cyclic allene changes its reactivity to that characteristic of highly reactive radical species.
Investigating resonance energy transfer from protein molecules to van der Waals nanosheets
Authors: Patel Arun Singh , Mishra Praveen , Kanaujia Pawan K. , Husain Syed Shariq , Vijaya Prakash G. , Chakraborti Anirban
Published: May 2017

The resonance energy transfer (RET) from tryptophan present in bovine serum albumin (BSA) to two dimensional (2D) nanomaterials has been reported.
Functional responsive superparamagnetic core/shell nanoparticles and their drug release properties
Authors: Ferjaoui Zied , Schneider Raphaël , Meftah Abdelaziz , Gaffet Eric , Alem Halima
Published: May 2017

Folic acid functionalized responsive core/shell superparamagnetic iron oxide nanoparticles were successfully synthesized for further application in cancer therapy. Their cancer drug loading and release performances were demonstrated.
Three-dimensional N-doped carbon nanotube@carbon foam hybrid: an effective carrier of enzymes for glucose biosensors
Authors: Fan Pinchao , Liu Lijuan , Guo Qiaohui , Wang Junli , Yang Jinhua , Guan Xiaoyu , Chen Shuiliang , Hou Haoqing
Published: May 2017

NCNTs anchored on carbon foam lead to an effective carrier of enzymes for biosensors.
Exotic thermoelectric behavior in nitrogenated holey graphene
Authors: Zhao Yinchang , Dai Zhenhong , Lian Chao , Meng, Sheng
Published: May 2017

Due to a high power factor and low thermal conductivity, azTexceeding 5.0 is reached in nitrogenated holey graphene.
Correction: Effective removal of salicylic and gallic acids from single component and impurity-containing systems using an isatin-modified adsorption resin
Authors: Han Fei , Xu Chao , Sun Wei-Zhi , Yu Shi-Tao , Xian Mo
Published: May 2017

Correction for ‘Effective removal of salicylic and gallic acids from single component and impurity-containing systems using an isatin-modified adsorption resin’ by Fei Han et al., RSC Adv., 2017, 7, 23164–23175.
Light assisted CO2reduction with methane over SiO2encapsulated Ni nanocatalysts for boosted activity and stability
Authors: Liu Huimin , Meng Xianguang , Dao Thang Duy , Liu Lequan , Li Peng , Zhao Guixia , Nagao Tadaaki , Yang Liuqing , Ye Jinhua
Published: May 2017

This study first adopted core/yolk–shell structured Ni@SiO2catalysts to improve their activities and stability in CRM with light irradiation.
Porphyrin-based metal-organic frameworks for solar fuel synthesis photocatalysis: band gap tuning via iron substitutions
Authors: Aziz Alex , Ruiz-Salvador A. Rabdel , Hernández Norge C. , Calero Sofia , Hamad Said , Grau-Crespo Ricardo
Published: May 2017

Computer simulations show that iron substitution at the octahedral centres of porphyrin-based metal–organic frameworks leads to optimal band structures for photocatalysis.
Effect of alkaline-earth species in phosphate glasses on the mobility of proton carriers
Authors: Yamaguchi Takuya , Saito Yasuhisa , Kuwahara Yasutaka , Yamashita Hiromi , Ishiyama Tomohiro , Nishii Junji , Yamashita Toshiharu , Kawazoe Hiroshi , Omata Takahisa
Published: May 2017

Highly ionic O–H bonding results in increased proton-carrier mobility in phosphate glasses containing glass-network-modifier ions exhibiting small electronegativity.
Sb2O3/MXene(Ti3C2Tx) hybrid anode materials with enhanced performance for sodium-ion batteries
Authors: Guo Xin , Xie Xiuqiang , Choi Sinho , Zhao Yufei , Liu Hao , Wang Chengyin , Chang Song , Wang Guoxiu
Published: May 2017

Sb2O3/MXene(Ti3C2Tx) composites with Sb2O3nanoparticles confined in the 3D network of Ti3C2Txflakes were fabricated as anodes for Na-ion batteries.
The synergistic effect of nitrogen doping and para-phenylenediamine functionalization on the physicochemical properties of reduced graphene oxide for electric double layer supercapacitors in organic electrolytes
Authors: Yang Junghoon , Shin Jeongyim , Park Mihui , Lee Gi-Hyeok , Amedzo-Adore Mawuse , Kang Yong-Mook
Published: May 2017

This work studied the synergistic effect of N-doping and p-PDA functionalization on the properties of RGO for supercapacitors.
Mary's Case: An Illustration of Interprofessional Collaborative Practice for a Child With Severe Disabilities
Authors: Ogletree Billy T. , Brady Nancy , Bruce Susan , Dean Evan , Romski MaryAnn , Sylvester Lorraine , Westling David
Published: May 2017

Purpose

The principles of interprofessional collaborative practice (IPCP) are illustrated through the case of Mary, a child with severe disabilities.

Method

Mary's experiences from early childhood to young adulthood are highlighted by both optimal and less-than-ideal examples of clinical services and collaborative practice. The range of collaboration illustrates potential variations in service delivery. Thematic comments and resources are provided by professionals experienced with and committed to IPCP who represent the following four disciplines: occupational therapy, physical therapy, special education, and speech-language pathology.

Conclusions

Although potentially challenging, IPCP is a dynamic practice methodology appropriate for speech-language pathologists and others serving persons with severe disabilities.
Comprehensive Literacy Instruction, Interprofessional Collaborative Practice, and Students With Severe Disabilities
Authors: Erickson Karen A.
Published: May 2017

Purpose

The purpose of this clinical focus article is to briefly describe comprehensive emergent and conventional literacy instruction for students with severe disabilities. Specific attention is given to interprofessional collaborative practice and the roles of team members in planning and delivering instruction.

Method

A rationale for the delivery of comprehensive instruction that balances skill and meaning emphases is provided with reference to new college and career readiness standards, the literature on literacy acquisition for students without disabilities, and, when possible, the literature on literacy acquisition for students with severe disabilities. Specific instructional approaches are presented to demonstrate how teams can actively engage students with severe disabilities in instruction that is collaborative, participatory, and interactive.

Results/Conclusions

Successful provision of comprehensive literacy instruction that allows students with severe disabilities to achieve conventional literacy takes time and the efforts of a collaborative interprofessional team. Speech-language pathologists play a critical role on these teams as they ensure that students with severe disabilities have the language and communication supports they need to be successful.
INTEGRAL IBIS, SPI, and JEM-X observations of LVT151012
Authors: Savchenko V. , Bazzano A. , Bozzo E. , Brandt S. , Chenevez J. , Courvoisier T. J.-L. , Diehl R. , Ferrigno C. , Hanlon L. , von Kienlin A. , Kuulkers E. , Laurent P. , Lebrun F. , Lutovinov A. , Martin-Carrillo A. , Mereghetti S. , Natalucci L. , Roques J. P. , Siegert T. , Sunyaev R. , Ubertini P.
Published: May 2017

During the first observing run of LIGO, two gravitational wave events and one lower-significance trigger (LVT151012) were reported by the LIGO/Virgo collaboration. At the time of LVT151012, the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) was pointing at a region of the sky coincident with the high localization probability area of the event and thus permitted us to search for its electromagnetic counterpart (both prompt and afterglow emission). The imaging instruments on board INTEGRAL (IBIS/ISGRI, IBIS/PICsIT, SPI, and the two JEM-X modules) have been exploited to attempt the detection of any electromagnetic emission associated with LVT151012 over three decades in energy (from 3 keV to 8 MeV). The omni-directional instruments on board the satellite, i.e., the SPI-ACS and the IBIS/Veto, complemented the capabilities of the IBIS/ISGRI and IBIS/PICsIT for detections outside their imaging field of view in order to provide an efficient monitoring of the entire LVT151012 localization region at energies above 75 keV. We did not find any significant transient source that was spatially and/or temporally coincident with LVT151012, obtaining tight upper limits on the associated hard X-ray and γ-ray radiation. For typical spectral models, the upper limits on the fluence of the emission from any 1 s counterpart of LVT151012 ranges from Fγ = 3.5 × 10-8 erg cm-2 (20–200 keV), within the field of view of the imaging instruments, to Fγ = 7.1 × 10-7 erg cm-2 (75–2000 keV), considering the least favorable location of the counterpart for a detection by the omni-directional instruments. These results can be interpreted as a tight constraint on the ratio of the isotropic equivalent energy released in the electromagnetic emission to the total energy of the gravitational waves: E75−2000 keV/EGW< 4.4 × 10-5. Finally, we provide an exhaustive summary of the capabilities of all instruments on board INTEGRAL to hunt for γ-ray counterparts of gravitational wave events, exploiting both serendipitousand pointed follow-up observations. This will serve as a reference for all future searches.
The choice of animal feeding system influences fatty acid intakes of the average French diet
Authors: Schmitt Bernard , Ferry Constance , Mairesse Guillaume , Kerhoas Nathalie , Chesneau Guillaume , Weill Pierre , Mourot Jacques
Published: May 2017

Fatty acids intake of French adult population does not comply with the French Population Reference Intakes (PRI). The aim the study is to quantify the impact of a modification of animal feeding system on the fatty acids intake of French population. A 15-day diet representative of average consumption for the French adult male population was developed with animal products derived either from conventional production system (STD) either from a specific production system (Bleu-Blanc-Cœur®[BBC]) that acts on the fatty acids profile of animal products. The impact of a such change in feeding system on fatty acids content has been quantified. BBC diet contributes to reducing the gap between the fatty acid content of a STD diet and the PRI with highest impact on C12:0–14:0–16:0 fatty acids (−4.6 g/d,i.e.63.3%), C18:3n-3 (+0.8 g/d,i.e.48.2%), C20:5n-3 (+35 mg/d,i.e.42.7%), C22:6n-3 (+49 mg/d,i.e.35%) and the C18:2n-6/C18:3n-3 ratio (−4.9 points,i.e.43.5%). The research also shows that animal products complement one another. Consuming a variety of animal source foods derived from a specific feeding practices could help reduce the gap between actual consumption and recommended dietary intake of fatty acids.
Totally Minimally Invasive Esophagectomy and Gastric Pull-Up Reconstruction with an Intrathoracic Circular Stapled Anastomosis with a Team of Two (Surgeon and Assistant Only)
Authors: Lang Hauke , Grimminger Peter
Published: May 2017

Totally minimally invasive esophagectomy (MIE) is nowadays en vogue.1
2
3
4
5 There are several reports showing that already partial minimally invasive esophagectomies (hybrid esophagectomies) with a laparoscopic approach and open transthoracic resection are beneficial for patients due to the reduced operative trauma. Also for total MIE several groups have reported benefits for patients in terms of morbidity and quality of life.1
5 However, different approaches and experiences of different esophageal surgery groups are hardly comparable and thus do not allow a simple answer in favor of a specific total MIE technique. To enlighten the field of total MIE, we present the technique as we perform this procedure nearly weekly in our department. The described MIE technique is safe and feasible. Changing to this demonstrating technique, we did not have any mortality so far, even in the first 30 cases. Especially for surgeons who plan to switch from the open surgical technique toward hybrid, MIE or robotic-assisted MIE.
Acute Treatment Patterns for Lower Extremity Trauma in the United States: Flaps versus Amputation
Authors: Mundy Lily , Truong Tracy , Shammas Ronnie , Gage Mark , Pomann Gina-Maria , Hollenbeck Scott
Published: May 2017

Background Treatment algorithms for large soft tissue defects in lower extremity trauma are not clearly defined. The aim of this study is to determine if there are geographic or demographic differences in the management of open tibia fractures with soft tissue defects requiring either soft tissue reconstruction or amputation in the United States (US).

Methods A retrospective analysis was performed on the Nationwide Inpatient Sample (NIS), 2000 to 2011. We evaluated flap and amputation rates in the open tibia fractures with soft tissue defects based on geographic and socioeconomic factors.

Results From 2000 to 2011, there were 175,283 open tibia fractures in the US; 7.2% (n = 12,620) had a concomitant soft tissue defect requiring either flap or amputation. The overall flap rate was 73.2% (n = 9,235). When compared with the South at 68%, flap rates were highest in the West at 79% (adjusted odds ratio [AOR] = 2.06; 95% confidence interval [CI] = 1.49, 2.86; p < 0.0001), followed by the Northeast at 77% (AOR = 1.63; 95% CI = 1.22, 2.19; p = 0.001), and the Midwest at 74% (AOR = 1.76; 95% CI = 1.25, 2.47; p = 0.001). Flap rates were lower in the rural hospitals in the West (AOR = 0.24; 95% CI = 0.07, 0.84; p = 0.03) and Northeast (AOR = 0.55; 95% CI = 0.37, 0.82; p = 0.003) when compared with the urban hospitals. Flap rates were highest in the highest income quartile at 77% (AOR = 1.53; 95% CI = 1.05, 2.25; p = 0.03) compared with 72% in the lowest income quartile.

Conclusions Reconstruction rates were significantly higher in three major US regions when compared with the South, urban hospitals in the West and Northeast, and the highest income quartile.
Physiological Dynamic Apnea Responses in Relation to Apnea Capacity in Triathletes
Authors: Guimard Alexandre , Zorgati Houssem , Brulaire Sylvain , Amiot Virgile , Prieur Fabrice , Collomp Katia
Published: May 2017

The aim was to assess the cardiac, arterial oxygen saturation, lactate, hormonal and Borg rating of perceived exertion (RPE) responses to acute apnea in relation to apnea capacity in 18 middle-aged triathletes. Subjects were monitored while swimming two 50-m freestyle exercise trials with fins at maximal speed: with normal frequency breathing (NB) and with complete apnea (Ap); the latter was used to assess apnea capacity. The subjects with significant alteration in swimming performance inducing a time increase greater than 2.5% during Ap vs. NB were put in the group: bad apnea capacity (Bad Ap); the others, who showed no significant alteration in performance, were put in the group: Good Ap. Under apnea, both groups showed a decrease in arterial oxygen saturation (p<0.05). In Ap conditions, only Bad Ap had a significant lower maximal heart rate vs. NB (p<0.05), with lower blood lactate (p<0.05) and arm stroke frequency (p<0.01). No change in saliva hormonal concentrations was found during the experiment for both groups, whereas RPE responses were increased in the Good Ap group under Ap vs. NB conditions. In conclusion, a good apnea capacity seems to be associated with lower cardiovascular and metabolic apnea alterations in middle-aged recreationally-trained triathletes.
Möglichkeiten und Grenzen der OCT-Angiografie bei Patienten mit Chorioretinopathia centralis serosa
Authors: Cakir B. , Reich M. , Lang S. , Bühler A. , Stahl A. , Böhringer D. , Agostini H. , Lange C.
Published: May 2017

Hintergrund Die Chorioretinopathia centralis serosa (CCS) ist eine der häufigsten Ursachen für erworbene Makulopathien. Die neue OCT-Angiografie (OCTA) erlaubt als ein nicht invasives, kontaktloses Verfahren erstmals eine detaillierte Beurteilung und Charakterisierung der Aderhaut bei CCS-Patienten.

Methoden Es wurden 43 Augen von 29 CCS-Patienten in diese retrospektive Studie eingeschlossen. Als Kontrollkollektiv dienten 18 Augen von 9 gesunden Probanden. Die OCTA-Aufnahmen wurden beurteilt und mit konventionellen Aufnahmen der Fluoreszenz- (FAG) und Indocyaningrünangiografie (ICG) verglichen.

Ergebnisse Bei allen CCS-Patienten zeigten sich im Vergleich zur gesunden Kontrolle Veränderungen in Form von fokalen Hyper- und Hypoperfusionsarealen in der Choriokapillaris. Diese waren besonders bei Patienten mit chronischer, atropher CCS ausgeprägt. Die konventionelle FAG/ICG wies in 10 von 43 Augen einen Quellpunkt und in 3 von 43 Augen eine chorioidale Neovaskularisation (CNV) auf. Die OCTA konnte in 4 von 10 Fällen den Quellpunkt in Form eines Hyperperfusionsareals bestätigen und in 2 von 3 Fällen die chorioidale Neovaskularisation detektieren. In einem Fall zeigte die OCTA eine CNV, die in der FAG/ICG nicht nachweisbar war.

Schlussfolgerung Patienten mit CCS weisen in der OCTA deutliche Hyper- und Hypoperfusionsareale in der Choriokapillaris auf. Die Detektion von Quellpunkten ist aufgrund des fehlenden Nachweises von Leckagen in der OCTA nicht zuverlässig möglich. Die OCTA ist jedoch im Gegensatz zur FAG/ICG in der Lage, unabhängig von der exsudativen Aktivität CNV präzise darzustellen und stellt somit eine wichtige Ergänzung in der Diagnostik der CCS dar.
Numerical investigation of co-axial DBD: Influence of relative permittivity of the dielectric barrier, applied voltage amplitude, and frequency
Authors: Gadkari Siddharth , Gu Sai
Published: May 2017

In this work, a one-dimensional numerical fluid model is developed for co-axial dielectric barrier discharge in pure helium and a parametric study is performed to systematically study the influence of relative permittivity of the dielectric barrier and the applied voltage amplitude and frequency on the discharge performance. Discharge current, gap voltage, and spatially averaged electron density profiles are presented as a function of relative permittivity and voltage parameters. For the geometry under consideration, both the applied voltage parameters are shown to increase the maximum amplitude of the discharge current peak up to a certain threshold value, above which it stabilized or decreased slowly. The spatially averaged electron density profiles follow a similar trend to the discharge current. Relative permittivity of the dielectric barrier is predicted to have a positive influence on the discharge current. At lower frequency, it is also shown to lead to a transition from Townsend to glow discharge mode. Spatially and time averaged power density is also calculated and is shown to increase with increasing relative permittivity, applied voltage amplitude, and frequency.
Bjerrum pairs in ionic solutions: A Poisson-Boltzmann approach
Authors: Adar Ram M. , Markovich Tomer , Andelman David
Published: May 2017

Ionic solutions are often regarded as fully dissociated ions dispersed in a polar solvent. While this picture holds for dilute solutions, at higher ionic concentrations, oppositely charged ions can associate into dimers, referred to as Bjerrum pairs. We consider the formation of such pairs within the nonlinear Poisson-Boltzmann framework and investigate their effects on bulk and interfacial properties of electrolytes. Our findings show that pairs can reduce the magnitude of the dielectric decrement of ionic solutions as the ionic concentration increases. We describe the effect of pairs on the Debye screening length and relate our results to recent surface-force experiments. Furthermore, we show that Bjerrum pairs reduce the ionic concentration in bulk electrolyte and at the proximity of charged surfaces, while they enhance the attraction between oppositely charged surfaces.
Correlations for the Viscosity and Thermal Conductivity of Ethyl Fluoride (R161)
Authors: Tsolakidou Ch. M. , Assael M. J. , Huber M. L. , Perkins R. A.
Published: May 2017

This paper presents new wide-ranging correlations for the viscosity and thermal conductivity of ethyl fluoride (R161) based on critically evaluated experimental data. The correlations are designed to be used with a recently published equation of state that is valid from 130 to 450 K, at pressures up to 100 MPa. The estimated uncertainty at a 95% confidence level is 2% for the viscosity of low-density gas (pressures below 0.5 MPa) and 3% for the viscosity of the liquid over the temperature range from 243 to 363 K at pressures up to 30 MPa. The estimated uncertainty is 3% for the thermal conductivity of the low-density gas and 3% for the liquid over the temperature range from 234 to 374 K at pressures up to 20 MPa. Both correlations may be used over the full range of the equation of state, but the uncertainties will be larger, especially in the critical region.
An imaging photoelectron-photoion coincidence investigation of homochiral 2R,3R-butanediol clusters
Authors: Daly Steven , Powis Ivan , Garcia Gustavo A. , Tia Maurice , Nahon Laurent
Published: May 2017

We report an experimental investigation of homochiral cluster formation in seeded molecular beam expansions of (2R,3R)-butanediol. Synchrotron radiation vacuum ultraviolet photoionization measurements have been performed using a double imaging electron-ion spectrometer in various configurations and modes of operation. These include measurements of the cluster ion mass spectra, wavelength scanned ion yields, and threshold electron spectra. Protonated cluster ions ranging up to n = 7 have been observed and size-selected photoelectron spectra and photoelectron circular dichroism (PECD) have been recorded by velocity map imaging, recorded in coincidence with ions, at a number of fixed photon energies. Translation temperatures of the cluster ions have been further examined by ion imaging measurements. As well as the sequence of protonated clusters with integral numbers of butanediol monomer units, a second series with half-integral monomer masses is observed and deduced to result from a facile cleavage of a butanediol monomer moiety within the nascent cluster. This second sequence of half-integral masses displays quite distinct behaviours. PECD measurements are used to show that the half-integral mass cluster ions do not share a common parentage with whole integer masses. Using an analogy developed with simple theoretical calculations of butanediol dimer structures, it is inferred that the dissociative branching into integral and half-integral ion mass sequences is controlled by the presence of different butanediol monomer conformations within the hydrogen bonded clusters.
Insight into electric field-induced rupture mechanism of water-in-toluene emulsion films from a model system
Authors: Dimova Desislava , Pisov Stoyan , Panchev Nikolay , Nedyalkova Miroslava , Madurga Sergio , Proykova Ana
Published: May 2017

This paper presents a model, which we have designed to get insight into the development of electro-induced instability of a thin toluene emulsion film in contact with the saline aqueous phase. Molecular dynamics (MD) simulations demonstrate the role of charge accumulation in the toluene-film rupture induced by a DC electric field. Two ensembles—NVT and NPT—are used to determine the critical value of the external field at which the film ruptures, the charge distribution and capacitance of the thin film, number densities, and the film structure. The rupture mechanism as seen from this model is the following: in both NVT and NPT ensembles, condenser plates, where the charge density is maximal, are situated at the very border between the bulk aqueous (water) phase and the mixed layer. No ion penetration is observed within the toluene core, thus leaving all the distribution of charges within the mixed zone and the bulk phase that could be attributed to the formation of hydration shells. When the critical electric field is reached within a certain time after the field application, electric discharge occurs indicating the beginning of the rupturing process. The MD simulations indicate that the NPT ensemble predicts a value of the critical field that is closer to the experimental finding.
Localized thin film damage sourced and monitored via pump-probe modulated thermoreflectance
Authors: Donovan Brian F. , Tomko John A. , Giri Ashutosh , Olson David H. , Braun Jeffrey L. , Gaskins John T. , Hopkins Patrick E.
Published: May 2017

Damage in the form of dewetting and delamination of thin films is a major concern in applications requiring micro- or nano-fabrication. In non-contact nanoscale characterization, optical interrogation must be kept to energies below damage thresholds in order to conduct measurements such as pump-probe spectroscopy. In this study, we show that the thermoreflectance of thin films can indicate the degree of film damage induced by a modulated optical heating source. By adjusting the absorbed power of the pump heating event, we identify the characteristics of the change in the thermoreflectance signal when leading up to and exceeding the damage threshold of gold films of varying thicknesses on glass substrates.
Low-power broadband solid-state MAS NMR of 14N
Authors: Pell Andrew J. , Sanders Kevin J. , Wegner Sebastian , Pintacuda Guido , Grey Clare P.
Published: May 2017

We propose two broadband pulse schemes for 14N solid-state magic-angle-spinning (MAS) nuclear magnetic resonance (NMR) that achieves (i) complete population inversion and (ii) efficient excitation of the double-quantum spectrum using low-power single-sideband-selective pulses. We give a comprehensive theoretical description of both schemes using a common framework that is based on the jolting-frame formalism of Caravatti et al. [J. Magn. Reson. 55, 88 (1983)]. This formalism is used to determine for the first time that we can obtain complete population inversion of 14N under low-power conditions, which we do here using single-sideband-selective adiabatic pulses. It is then used to predict that double-quantum coherences can be excited using low-power single-sideband-selective pulses. We then proceed to design a new experimental scheme for double-quantum excitation. The final double-quantum excitation pulse scheme is easily incorporated into other NMR experiments, as demonstrated here for double quantum–single quantum 14N correlation spectroscopy, and 1H–14N dipolar heteronuclear multiple-quantum correlation experiments. These pulses and irradiation schemes are evaluated numerically using simulations on single crystals and full powders, as well as experimentally on ammonium oxalate ((NH4)2C2O4) at moderate MAS and glycine at ultra-fast MAS. The performance of these new NMR methods is found to be very high, with population inversion efficiencies of 100% and double-quantum excitation efficiencies of 30%–50%, which are hitherto unprecedented for the low radiofrequency field amplitudes, up to the spinning frequency, that are used here.
Ion and velocity map imaging for surface dynamics and kinetics
Authors: Harding Dan J. , Neugebohren Jannis , Hahn Hinrich , Auerbach D. J. , Kitsopoulos T. N. , Wodtke Alec M.
Published: May 2017

We describe a new instrument that uses ion imaging to study molecular beam-surface scattering and surface desorption kinetics, allowing independent determination of both residence times on the surface and scattering velocities of desorbing molecules. This instrument thus provides the capability to derive true kinetic traces, i.e., product flux versus residence time, and allows dramatically accelerated data acquisition compared to previous molecular beam kinetics methods. The experiment exploits non-resonant multiphoton ionization in the near-IR using a powerful 150-fs laser pulse, making detection more general than previous experiments using resonance enhanced multiphoton ionization. We demonstrate the capabilities of the new instrument by examining the desorption kinetics of CO on Pd(111) and Pt(111) and obtain both pre-exponential factors and activation energies of desorption. We also show that the new approach is compatible with velocity map imaging.
Efficient 58-GHz relativistic orotron with combined mode selection
Authors: Totmeninov E. M. , Pegel I. V. , Tarakanov V. P.
Published: May 2017

This article presents time-dependent numerical modeling of V-band relativistic orotron: a high-power microwave generator with a TM03 oscillation mode in an oversized (D/λ ∼ 2.7) electrodynamic structure and diffractive output in the TM02 mode. Single-mode operation of the oscillator is ensured by the cyclotron selection of the working axisymmetric mode, with simultaneous depression of competing non-axisymmetric modes by means of cutting longitudinal slits in the wall of the slow-wave structure. The simulated output microwave power is 350 MW with a power conversion efficiency of 31% when using a 3.6 kA, 310 keV electron beam transported in the 3.9 T magnetic field. The simulation employed 2.5D axisymmetric and 3D Cartesian versions of the KARAT code.
Joule heat-induced breakdown of organic thin-film devices under pulse operation
Authors: Yoshida Kou , Matsushima Toshinori , Shiihara Yu , Kuwae Hiroyuki , Mizuno Jun , Adachi Chihaya
Published: May 2017

We investigated the influence of the substrate's thermal conductivities (k) and the widths of the electrical pulses (τpulse) on the maximum current densities (Jmax) in organic thin-film devices. We also estimated the temperature rise (ΔT) inside devices under the pulse operation using numerical calculations to interpret the observed differences in Jmax. For a long τpulse of 5 μs, Jmax is higher for devices with high-k sapphire substrates (around 1.2 kA/cm2) than devices with low-k plastic substrates (around 0.4 kA/cm2). This is because high-k sapphire substrates can work as heat sinks to relax ΔT for such a long τpulse. Operation of devices with high-k sapphire substrates for a short τpulse of 70 ns resulted in further relaxation of ΔT, leading to an increase of Jmax to around 5 kA/cm2. Interestingly, for such a short τpulse, devices with high-k sapphire and low-k plastic substrates showed similar Jmax and ΔT values, the reason for which may be that it is difficult for the generated Joule heat to travel to the substrate across a low-k organic layer within this short time.
Generation of multi-scroll attractors without equilibria via piecewise linear systems
Authors: Escalante-González R. J. , Campos-Cantón E. , Nicol Matthew
Published: May 2017

In this paper, we present a new class of dynamical system without equilibria which possesses a multiscroll attractor. It is a piecewise-linear system which is simple, stable, displays chaotic behavior and serves as a model for analogous non-linear systems. We test for chaos using the 0-1 Test for Chaos from Gottwald and Melbourne [SIAM J. Appl. Dyn. Syst. 8(1), 129–145 (2009)].
The stability of fixed points for a Kuramoto model with Hebbian interactions
Authors: Bronski Jared C. , He Yizhang , Li Xinye , Liu Yue , Sponseller Danielle Rae , Wolbert Seth
Published: May 2017

We consider a variation of the Kuramoto model with dynamic coupling, where the coupling strengths are allowed to evolve in response to the phase difference between the oscillators, a model first considered by Ha, Noh, and Park. We demonstrate that the fixed points of this model, as well as their stability, can be completely expressed in terms of the fixed points and stability of the analogous classical Kuramoto problem where the coupling strengths are fixed to a constant (the same for all edges). In particular, for the “all-to-all” network, where the underlying graph is the complete graph, the problem reduces to the problem of understanding the fixed points and stability of the all-to-all Kuramoto model with equal edge weights, a problem that is well understood.
Conformation change of an isotactic poly (N-isopropylacrylamide) membrane: Molecular dynamics
Authors: Adroher-Benítez Irene , Moncho-Jordá Arturo , Odriozola Gerardo
Published: May 2017

In this work, isotactic Poly (N-Isopropylacrylamide)—PNIPAM—in neat water and in electrolyte solutions is studied by means of molecular dynamics simulations. This is done for an infinitely diluted oligomer and for an assembly of several PNIPAM chains arranged into a planar membrane configuration with a core-shell morphology. We employed two different force fields, AMBER (assisted model building with energy refinement) and OPLS-AA (all atom - optimized potentials for liquid simulations) in combination with extended simple point charge water. Despite the more water insoluble character of isotactic oligomers, our results support the existence of a coil to globule transition for the isolated 30-mer. This may imply the existence of an oligomer rich phase of coil-like structures in equilibrium with a water rich phase for temperatures close but below the coil to globule transition temperature, TΘ. However, the obtained coil structure is much more compact than that corresponding to the syndiotactic chain. Our estimations of TΘ are (308±5) K and (303±5) K for AMBER and OPLS-AA, respectively. The membrane configuration allows one to include chain-chain interactions, to follow density profiles of water, polymer, and solutes, and accessing the membrane-water interface tension. Results show gradual shrinking and swelling of the membrane by switching temperature above and below TΘ, as well as the increase and decrease of the membrane-water interface tension. Finally, concentration profiles for 1M NaCl and 1M NaI electrolytes are shown, depicting a strong salting-out effect for NaCl and a much lighter effect for NaI, in good qualitative agreement with experiments.
Effect of off-center ion substitution in morphotropic lead zirconate titanate composition
Authors: Bhattarai Mohan K. , Pavunny Shojan P. , Instan Alvaro A. , Scott James F. , Katiyar Ram S.
Published: May 2017

A detailed study of the effect of off-center donor ion (Sc3+) substitution on structural, microstructural, optical, dielectric, electrical, and ferroelectric properties of morphotropic composition of lead zirconate titanate electroceramics with the stoichiometric formula Pb0.85Sc0.10Zr0.53Ti0.47O3 (PSZT) and synthesized using a high energy solid-state reaction technique was carried out. Powder x-ray diffractometry was used to identify the stabilized tetragonal phase (space group P4mm) with considerably reduced tetragonal strain, c/a= 1.005. An analysis of the thermal dependence of the Raman results indicated a smooth displacive (ferroelectric-paraelectric) phase transition as revealed by the observed disappearance of the soft modes A1 (1TO) and A1 (2TO) above 460 K. The dielectric response of Pt/PSZT/Pt metal-ferroelectric-metal capacitors was probed over a wide range of thermal excursions (85–600 K) and ac signal frequencies (102–106 Hz). Thermally activated dynamic and static conduction processes indicate hopping conduction mechanism (Eact ≤ 0.015 eV) and the formation of small polarons caused by the electron and/or hole-lattice (phonon) interaction (Eact ≥ 0.1 eV) at low (100–300 K) and high temperatures (300–600 K), respectively. The reduction in remnant polarization obtained is in good agreement with the largely reduced tetragonal strain observed in this sample, (Pr ∝c/a−1). DC conduction is dominated by Poole-Frenkel mechanism that assumes a Coulombic attraction between detrapped electrons and positively charged stationary defect species in the polycrystalline matrix.
Effects of positive dust component on self-gravitational instabilities of electromagnetic waves in dusty plasmas
Authors: Emamuddin M. , Mamun A. A.
Published: May 2017

An investigation has been carried out on the electromagnetic modes and associated instabilities in a partially ionized, nonuniform, self-gravitating positively and negatively charged dusty plasma, showing the effects of the inhomogeneities in the external magnetic field and the plasma number density, the neutral fluid dynamics, the drag forces, etc. The effects of these factors have been treated both analytically and numerically. The factors that stabilize the low frequency electromagnetic waves in the dusty plasma under consideration could be responsible to form the astrophysical objects in the galaxies.
Effects of ion thermal pressure on wave properties of electromagnetic ion cyclotron waves in a H+-He+-O+ plasma
Authors: Tang Ying , Zhao Jinsong , Sun Heyu , Lu Jianyong , Wang Ming
Published: May 2017

Electromagnetic ion cyclotron (EMIC) waves in the H+, He+, and O+ bands are frequently observed in the magnetosphere. This study examines the effects of the thermal pressure of heavy He+ and O+ ions on EMIC wave properties. It illustrates that hot and isotropic heavy ions may completely suppress the growth of He+ band EMIC waves, whereas H+ band waves are growing irrespective of whether the heavy ions are cool or hot. At large O+ ion concentration, O+ band waves grow considerably as hot protons, and heavy ions are anisotropic. Results from the hot fluid model show that anisotropic thermal pressures of heavy ions result in the resonance frequency of EMIC waves larger than that from the cold fluid model, and therefore, narrowing the corresponding stop bands. Furthermore, the anisotropic ion thermal pressures lead to the minimum resonant energy of electrons interacting with EMIC waves at higher frequencies than that predicted by the cold fluid model.
Acoustic broadband metacouplers
Authors: Li Kun , Liang Bin , Yang Jing , Yang Jun , Cheng Jian-chun
Published: May 2017

We present the concept of acoustic metacoupler for broadband impedance match between two media with different impedances and cross sections. An implementation is demonstrated that produces spatial gradient of effective acoustic impedance by utilizing helical-like structure with continuously varying pitch instead of changing the cross-section or employing multiple layers. Numerical results verify the effectiveness of our design in achieving near-unity coupling efficiency in a broad band. We anticipate the proposed metacoupler with capability and flexibility to open route to broadband impedance matching and to have a wide realm of potential applications such as transducer design, acoustic imaging and energy harvesting.
Crystalline phase dependent spin current efficiency in sputtered Ta thin films
Authors: Bansal Rajni , Behera Nilamani , Kumar Akash , Muduli P. K.
Published: May 2017

We report on the optical detection of the spin Hall effect (SHE) as a function of the crystalline structure of sputtered Ta thin films using a magneto-optical Kerr system. The growth rate of Ta films is found to influence the crystalline phase of Ta films. At a lower growth rate, GR the pure α-phase of Ta is formed, which changes to the pure β-phase for GR ≥ 1.44 Å/s. For an intermediate growth rate, 0.62 Å/s ≤ GR < 1.44 Å/s, an admixture of α and β phases is formed. We optically detect spin accumulation due to the spin Hall effect in Ta films by applying a square wave current and using Fourier analysis in a magneto-optical Kerr effect setup that uses spatially modulated incident light. We show that there exists a threshold current density (Jth) above which spin current can be detected via the optical technique. Jth, which is a measure of spin current efficiency, is found to be the lowest in the mixed phase of Ta and is strongly correlated with the crystalline phase of Ta films.