bluuebunny/crossref_metadata_2025_split huggingface dataset:
Transcatheter versus surgical aortic valve replacement in intermediate‐risk patients: Evidence from a meta‐analysis
Authors: Sardar Partha , Kundu Amartya , Chatterjee Saurav , Feldman Dmitriy N. , Owan Theophilus , Kakouros Nikolaos , Nairooz Ramez , Pape Linda A. , Feldman Ted , Dawn Abbott J. , Elmariah Sammy 
Published: April 2017

ObjectivesWe performed a meta‐analysis to evaluate the efficacy and safety of transcatheter aortic valve replacement (TAVR) in comparison to surgical aortic valve replacement (SAVR) in intermediate‐risk patients.BackgroundTAVR is an established treatment option in high‐risk patients with severe aortic valve stenosis (AS). There are fewer data regarding efficacy of TAVR in intermediate‐risk patients.MethodsDatabases were searched through April 30, 2016 for studies that compared TAVR with SAVR for the treatment of intermediate‐risk patients with severe AS. We calculated summary risk ratios (RRs) and 95% confidence intervals (CIs) with the random‐effects model.ResultsThe analysis included 4,601 patients from 7 studies (2 randomized and 5 observational). There was no significant difference in all‐cause mortality between the two groups after mean follow‐up of 1.15 years [14.7% with TAVR vs 15.4% with SAVR; RR 0.93; 95% CI 0.77–1.12]. TAVR resulted in lower rates of acute kidney injury [number needed to treat (NNT) = 26], major bleeding (NNT = 4), and atrial‐fibrillation (NNT = 6), but higher rates of major vascular complications [number needed to harm (NNH)= 18], and moderate/severe aortic regurgitation (NNH = 13). The rate of permanent‐pacemaker implantation was significantly higher with TAVR in observational studies (RR 2.31; 95% CI 1.22–2.81), but not in RCTs (RR 1.21; 95% CI 0.93–1.56). No significant difference in the rate of stroke or myocardial infarction was observed.ConclusionsOur analysis of mid‐term results showed that TAVR has similar clinical efficacy to SAVR in intermediate‐risk patients with severe AS, and can be a suitable alternative to surgical valve replacement. © 2017 Wiley Periodicals, Inc.
Minimization of door‐to‐balloon time for ST‐elevation acute myocardial infarction: a case report
Authors: Akashi Naoyuki , Sakakura Kenichi , Yamamoto Kei , Taniguchi Yousuke , Wada Hiroshi , Momomura Shin‐ichi , Fujita Hideo 
Published: April 2017

Key Clinical MessageIt is of utmost importance to minimize the door‐to‐balloon time for the initial treatment of ST‐elevation acute myocardial infarction. In this case report, we made all kinds of efforts to minimize procedures in the emergency department (ED minimization) as well as in the catheter laboratory without sacrificing safety.
Recyclable Acid–Base Bifunctional Core–Shell–Shell Nanosphere Catalyzed Synthesis of 5‐Aryl‐1H‐1,2,3‐triazoles through the “One‐Pot” Cyclization of Aldehydes, Nitromethane, and Sodium Azide
Authors: Liu Lei , Ai Yongjian , Li Dong , Qi Li , Zhou Junjie , Tang Zhike , Shao Zixing , Liang Qionglin , Sun Hong‐Bin 
Published: April 2017

AbstractA magnetically separable core–shell–shell nanosphere, Fe3O4@nSiO2‐SO3H@MS‐NHCOCH3 (n=nonporous, MS=microporous SiO2), was fabricated as an acid–base collaborative catalyst for the three‐component cyclization of aromatic aldehydes, nitroalkane, and sodium azide to afford 1H‐1,2,3‐triazoles. The bifunctional heterogeneous catalyst showed high activity for this transformation and good chemoselectivity, and toxic HN3 was not released during the course of the reaction. A variety of aldehydes were transformed into the corresponding 5‐aryl‐1H‐1,2,3‐triazoles in up to 98 % yield. Furthermore, the catalyst could be recovered by using an external magnetic field and reused many times without any loss in activity. In contrast, a homogeneous catalyst system comprising ammonium acetate/acetic acid also worked in this three‐component cyclization to afford 1H‐1,2,3‐triazoles.
Catalytic Au Wool‐Ball‐Shaped Nanostructures
Authors: Yin Xiuxiu , Teradal Nagappa L. , Morag Ahiud , Jelinek Raz 
Published: April 2017

AbstractGold nanoparticles shaped like wool balls were synthesized through the simple, spontaneous crystallization/reduction of gold thiocyanate [Au(SCN)4−] in water, without co‐addition of nucleating seeds, templating compounds, or reducing agents. The Au nanowool balls were highly uniform in size and displayed a remarkable nanoribbon surface morphology. Size and structural modulation of the particles were accomplished through the tuning of the concentration of the gold complex, as well as upon adding small quantities of organic solvents. The unique corrugated morphology and high surface area of the Au nanowool balls enabled their use as effective catalytic substrates for methanol oxidation and nitrophenol reduction.
On the Effect of Native SiO2 on Si over the SPR‐mediated Photocatalytic Activities of Au and Ag Nanoparticles
Authors: Wang Jiale , de Freitas Isabel C. , Alves Tiago V. , Ando Romulo A. , Fang Zebo , Camargo Pedro H. C. 
Published: April 2017

AbstractIn hybrid materials containing plasmonic nanoparticles such as Au and Ag, charge‐transfer processes from and to Au or Ag can affect both activities and selectivity in plasmonic catalysis. Inspired by the widespread utilization of commercial Si wafers in surface‐enhanced Raman spectroscopy (SERS) studies, we investigated herein the effect of the native SiO2 layer on Si wafers over the surface plasmon resonance (SPR)‐mediated activities of the Au and Ag nanoparticles (NPs). We prepared SERS‐active plasmonic comprised of Au and Ag NPs deposited onto a Si wafer. Here, two kinds of Si wafers were employed: Si with a native oxide surface layer (Si/SiO2) and Si without a native oxide surface layer (Si). This led to Si/SiO2/Au, Si/SiO2/Ag, Si/Au, and Si/Ag NPs. The SPR‐mediated oxidation of p‐aminothiophenol (PATP) to p,p′‐dimercaptoazobenzene (DMAB) was employed as a model transformation. By comparing the performances and band structures for the Si/Au and Si/Ag relative to Si/SiO2/Au and Si/SiO2/Ag NPs, it was found that the presence of a SiO2 layer was crucial to enable higher SPR‐mediated PATP to DMAB conversions. The SiO2 layer acts to prevent the charge transfer of SPR‐excited hot electrons from Au or Ag nanoparticles to the Si substrate. This enabled SPR‐excited hot electrons to be transferred to adsorbed O2 molecules, which then participate in the selective oxidation of PATP to DMAB. In the absence of a SiO2 layer, SPR‐excited hot electrons are preferentially transferred to Si instead of adsorbed O2 molecules, leading to much lower PATP oxidation.
Ultrasmall Platinum Stabilized on Triphenylphosphine‐Modified Silica for Chemoselective Hydrogenation
Authors: Jayakumar Sanjeevi , Modak Arindam , Guo Miao , Li He , Hu Xiangping , Yang Qihua 
Published: April 2017

AbstractChemoselective hydrogenation of substrates with more than one functional group that could be hydrogenated is quite challenging and is of fundamental importance. Here, the enhanced chemoselectivity of ultrasmall (<1 nm) platinum nanoparticles (NPs) stabilized on silica modified with triphenylphosphine (PSiO2) in hydrogenation reactions is reported. Platinum NPs on PSiO2 exhibit much higher selectivity than those on SiO2 in the hydrogenation of acetophenone to 1‐phenylethanol (99.9 versus 36 %) and hydrogenation of phenylacetylene to styrene (85 versus 52 %). The results of NMR spectroscopy, X‐ray photoelectron spectroscopy, and in situ CO adsorption FTIR spectroscopy indicate the existence of strong interactions between triphenylphosphine and Pt NPs. Consequently, Pt NPs on PSiO2 have smaller particle sizes and more positive Pt 4 f binding energy than those of Pt/SiO2; these are the main contributors to the superior chemoselectivity of Pt NPs. The organically modified silica could act as an efficient solid ligand for tuning the catalytic performance of metal NPs.
pH‐Responsive Aminoproline‐Containing Collagen Triple Helices
Authors: Egli Jasmine , Siebler Christiane , Maryasin Boris , Erdmann Roman S. , Bergande Cedric , Ochsenfeld Christian , Wennemers Helma 
Published: April 2017

Abstract(4S)‐ and (4R)‐configured aminoproline (Amp) residues were used as pH‐responsive probes to tune the thermal stability of collagen triple helices in acidic and basic environments. The different steric and stereoelectronic properties of amino versus ammonium groups lead to a switch of the ring pucker of Amp upon changing the pH. The choice of the position of Amp within collagen model peptides (CMPs) as well as the absolute configuration at C(4) of the pH‐responsive probe allows for tuning of the stability of Amp‐containing collagen triple helices over a broad range. Comparative quantum chemical calculations on the steric and stereoelectronic effects of amino and ammonium groups versus fluorine, hydroxy, chlorine, and methyl substituents support the experimental findings. The research also shows that substitution of the naturally occurring hydroxy group in collagen by electron‐withdrawing groups with a larger hydration shell than that of the hydroxy group is not tolerated.
Heptacoordinate CoII Complex: A New Architecture for Photochemical Hydrogen Production
Authors: Lucarini Fiorella , Pastore Mariachiara , Vasylevskyi Serhii , Varisco Massimo , Solari Euro , Crochet Aurelien , Fromm Katharina M. , Zobi Fabio , Ruggi Albert 
Published: April 2017

AbstractThe first heptacoordinate cobalt catalyst for light‐driven hydrogen production in water has been synthesized and characterized. Photochemical experiments using [Ru(bpy)3]2+ as photosensitizer gave a turnover number (TON) of 16300 mol H2 (mol cat.)−1 achieved in 2 hours of irradiation with visible (475 nm) light. This promising result provides a path forward in the development of new structures to improve the efficiency of the catalysis.
Heterogeneous One‐Pot Carbonylation and Mizoroki–Heck Reaction in a Parallel Manner Following the Cleavage of Cinnamaldehyde Derivatives
Authors: Hattori Tomohiro , Ueda Shun , Takakura Ryoya , Sawama Yoshinari , Monguchi Yasunari , Sajiki Hironao 
Published: April 2017

AbstractInvited for the cover of this issue is the group of Yasunari Monguchi and Hironao Sajiki at the Pharmaceutical University of Gifu. The image depicts that palladium on carbon is an excellent conductor for the simultaneous performance of carbonylation of iodoarenes and Mizoroki–Heck type reaction starting from cinnamaldehyde (G‐clef) with good harmony. Read the full text of the article at 10.1002/chem.201606048.
Intraband optical activity of semiconductor nanocrystals
Authors: Baimuratov Anvar S. , Tepliakov Nikita V. , Gun'Ko Yurii K. , Shalkovskiy Alexey G. , Baranov Alexander V. , Fedorov Anatoly V. , Rukhlenko Ivan D. 
Published: April 2017

AbstractHere we review our three recently developed analytical models describing the intraband optical activity of semiconductor nanocrystals, which is induced by screw dislocations, ionic impurities, or irregularities of the nanocrystal surface. The models predict that semiconductor nanocrystals can exhibit strong optical activity upon intraband transitions and have large dissymmetry of magnetic‐dipole absorption. The developed models can be used to interpret experimental circular dichroism spectra of nanocrystals and to advance the existing techniques of enantioseparation, biosensing, and chiral chemistry.
A reduced‐order model for chemical species transport in a tube with a constant wall concentration
Authors: Dejam Morteza , Hassanzadeh Hassan , Chen Zhangxin 
Published: April 2017

AbstractA two‐dimensional advection‐diffusion model accompanied with a parabolic velocity profile of Poiseuille flow is considered for the chemical species transport in a tube with a constant wall concentration. The Reynolds decomposition technique is applied to reduce it to an equivalent one‐dimensional model for advective‐dispersive transport in a tube through which the effective advection coefficient, the dispersion coefficient, and the effective Sherwood number are developed for the problem under study. The derived and the classical Taylor models are also compared in order to find the difference between the two arrangements. The reduced‐order model for the transport equation shows that the effective advection coefficient increases, whereas the dispersion coefficient in the tube decreases as compared to the classical Taylor equation. The effective Sherwood number for the steady state form of the developed model is found to be only a function of the Peclet number, which varies in the range of 3.215 ≤ Sh ≤ 4. These results find application in design of experiments and improve our understanding of mass transfer in microfluidic devices.
A comparison between wishes and status: Gray is not the preference for residents while the city shows neutral colors
Authors: Gou Aiping , Wang Jiangbo 
Published: April 2017

AbstractUrban color has become one of the hot topics in China since 2000. To provide suggestions for making the urban color plan for Changzhou of about 253 square kilometers in 2011, the research group evaluated the visual quality of the present architectural color in real urban space and investigated the residential attitude for the present and the future ones. Open‐ended questionnaire of 1065 was taken effectively face to face accompanied with NCS Cascade 980 to understand the residents' attitude about the present architectural color in Changzhou city, and the expectations for the future. At the same time, an overall survey and evaluation on the present architectural color was conducted from the aspects of materials, functions, environmental and color relationship as well as the color code itself. Data reveal the residents' attitude to color preferences is more tolerant in hue with no special color bias, and inclined to those with obvious chroma and clear color predisposition, not very vivid, nor very dark. While the site survey shows the present color focuses mostly in high or middle‐high brightness, neutral ones. In site evaluation and analysis, architecture obtained good scores are those have obviously color predisposition. Colors that are inclined to good scores still have obvious color tendency but is lighter than that of good ones and mostly concentrate in the middle high and high brightness. Although still shows warm colors the most, the color tendency was not so obvious and the proportion of grayish ones increased. As to colors inclined to bad, very large proportion of grayish color existed. Actually, the most insurance color people usually thought, if has no good façade form supporting, is difficult to obtain a pleasant visual effect. Also, if the material is not in agreement with the color, the visual effect will be even worse.
An aesthetic measurement method for matching colours in product design
Authors: Hsiao Shih‐Wen , Yang Meng‐Hua , Lee Chu‐Hsuan 
Published: April 2017

AbstractSince it is important to know how to evaluate human emotions reflected in the image of a product during the process of product design precisely, a means of evaluating the aesthetic measurement of the image of a product with colour matching is proposed in this article. This method entails a solid visual angle of the subject, the distribution of colour‐area ratios, and colour images as experimental samples for colour matching. The evaluation was conducted based on a formula of the aesthetic measurement of the coloured area. To ensure that the entire practical colour co‐ordinate system was covered, 111 coloured chips were distributed throughout the implementation procedure. The aesthetic measure of colour harmony in this study was calculated based on aesthetic measure theory; moreover, each of the three given images received three symbolic colour combinations before using the fuzzy theory to determine the relationship between the image and the colour combinations of the products. Observers' evaluations of the fuzzy theory and the aesthetic measurement model were then compared, and the results showed that the proposed method succeeded in obtaining a high degree of satisfaction for the top 2 ranked samples in the aesthetic measurement model evaluation and human evaluation. Although only 2 product designs were used as examples for performing the evaluation procedure, the procedure can also be applied to other products.
A comparative study on using linear programming and simulated annealing in the optimal realization of a SC filter
Authors: Shi Guoyong , Zhang Ailin , Gu Yanjie 
Published: April 2017

SummaryThe switched‐capacitor (SC) circuit realization problem is traditionally solved by heuristic algorithms. However, an algorithm‐like simulated annealing (SA) is stochastic, and its behavior in solving a non‐convex optimization problem is unpredictable. In this paper, we make an investigation on using a deterministic and a stochastic optimization algorithm for solving the realization problem of the classical Fleischer–Laker SC filter. By considering minimum area as the design goal, we prove that the a linear programming‐based deterministic algorithm is capable of finding a global minimum. With the global optimality established, we then use an SA algorithm to solve the same problem in purpose of investigating the search capability of the SA algorithm. We find that the stochastic SA algorithm cannot always reach a suboptimal solution with quality comparable with the linear programming result. Other issues like convergence speed and the percentage of arriving at the global minimum are examined as well. This research exposes that understanding the underlying optimization problem structure for the realization of SC circuits is of fundamental meaning for developing more efficient heuristic algorithms. Copyright © 2017 John Wiley & Sons, Ltd.
Pneumocytoma (sclerosing hemangioma), a potential pitfall
Authors: Hissong Erika , Rao Rema 
Published: April 2017

AbstractPneumocytoma is an uncommon benign tumor of the lung, derived from primitive respiratory epithelium, with a predilection for middle‐aged females. A single, well‐circumscribed mass is commonly identified on imaging, necessitating pathologic evaluation for further assessment. Fine‐needle aspiration cytology is a minimally invasive and cost‐effective method that can be utilized in the diagnosis of these lesions. Yet, distinction of pneumocytoma from other entities such as well‐differentiated adenocarcinoma or carcinoid tumor can be quite challenging. Herein, we describe a case initially misdiagnosed as lung adenocarcinoma on FNA that was proven to be pneumocytoma on subsequent resection. This report highlights the importance of recognizing key cytologic features of pneumocytoma, namely the papillary architecture, dual cell population, and the hemorrhagic background with foamy macrophages, among others. An accurate preoperative diagnosis of this entity provides optimal patient management, as conservative surgical excision is curative. Diagn. Cytopathol. 2017;45:744–749. © 2017 Wiley Periodicals, Inc.
Reproductive ecology of interior least tern and piping plover in relation to Platte River hydrology and sandbar dynamics
Authors: Farnsworth Jason M. , Baasch David M. , Smith Chadwin B. , Werbylo Kevin L. 
Published: April 2017

AbstractInvestigations of breeding ecology of interior least tern (Sternula antillarum athalassos) and piping plover (Charadrius melodus) in the Platte River basin in Nebraska, USA, have embraced the idea that these species are physiologically adapted to begin nesting concurrent with the cessation of spring floods. Low use and productivity on contemporary Platte River sandbars have been attributed to anthropomorphically driven changes in basin hydrology and channel morphology or to unusually late annual runoff events. We examined distributions of least tern and piping plover nest initiation dates in relation to the hydrology of the historical central Platte River (CPR) and contemporary CPR and lower Platte River (LPR). We also developed an emergent sandbar habitat model to evaluate the potential for reproductive success given observed hydrology, stage–discharge relationships, and sandbar height distributions. We found the timing of the late‐spring rise to be spatially and temporally consistent, typically occurring in mid‐June. However, piping plover nest initiation peaks in May and least tern nest initiation peaks in early June; both of which occur before the late spring rise. In neither case does there appear to be an adaptation to begin nesting concurrent with the cessation of spring floods. As a consequence, there are many years when no successful reproduction is possible because emergent sandbar habitat is inundated after most nests have been initiated, and there is little potential for successful renesting. The frequency of nest inundation, in turn, severely limits the potential for maintenance of stable species subpopulations on Platte River sandbars. Why then did these species expand into and persist in a basin where the hydrology is not ideally suited to their reproductive ecology? We hypothesize the availability and use of alternative off‐channel nesting habitats, like sandpits, may allow for the maintenance of stable species subpopulations in the Platte River basin.
Estimating utilization distributions from fitted step‐selection functions
Authors: Signer Johannes , Fieberg John , Avgar Tal 
Published: April 2017

AbstractHabitat‐selection analyses are often used to link environmental covariates, measured within some spatial domain of assumed availability, to animal location data that are assumed to be independent. Step‐selection functions (SSFs) relax this independence assumption, by using a conditional model that explicitly acknowledges the spatiotemporal dynamics of the availability domain and hence the temporal dependence among successive locations. However, it is not clear how to produce an SSF‐based map of the expected utilization distribution. Here, we used SSFs to analyze virtual animal movement data generated at a fine spatiotemporal scale and then rarefied to emulate realistic telemetry data. We then compared two different approaches for generating maps from the estimated regression coefficients. First, we considered a naïve approach that used the coefficients as if they were obtained by fitting an unconditional model. Second, we explored a simulation‐based approach, where maps were generated using stochastic simulations of the parameterized step‐selection process. We found that the simulation‐based approach always outperformed the naïve mapping approach and that the latter overestimated home‐range size and underestimated local space‐use variability. Differences between the approaches were greatest for complex landscapes and high sampling rates, suggesting that the simulation‐based approach, despite its added complexity, is likely to offer significant advantages when applying SSFs to real data.