bluuebunny/crossref_metadata_2025_split huggingface dataset:
Die enantiomeren Carvone von Krause Minze und Kümmel
Authors: Titus Juliane , Siehl Hans‐Ullrich , Zeller Klaus‐Peter , Berger Stefan , Sicker Dieter 
Published: March 2017

Abstract(R)‐(–)‐Carvon ist das Leitaroma von Krause Minze. (S)‐(+)‐Carvon dominiert den Geschmack von Echtem Kümmel. Ein sensorischer Unterschied zwischen Enantiomeren ist rational erklärbar. Hier ist er besonders markant. Beide Pflanzen haben alte Spuren in unserer Kultur hinterlassen. Diese zum chiral pool gehörenden Monoterpenketone sind nützliche Ausgangsstoffe für die Synthese komplexerer chiraler Naturstoffe. (S)‐(+)‐Carvon wurde durch fraktionierte Vakuumdestillation aus Kümmelöl gewonnen. (R)‐(–)‐Carvon erforderte nach der Destillation von Krause Minze‐Öl noch eine Säulenchromatografie. Alle analytischen Spektren sind vollständig entweder im Hauptteil oder in der supporting information wiedergegeben. Die NMR‐ sowie die Massenspektren werden eingehend interpretiert und mit theore0tischen Berechnungen der 13C‐chemischen Verschiebungen verglichen.
A Turn‐On Fluorescence Chemosensor for Cyanide in Aqueous Media Based on a Nucleophilic Addition Reaction
Authors: Chen Jie , Li Wenting , Li Qiao , Lin Qi , Yao Hong , Zhang Youming , Wei Taibao 
Published: March 2017

AbstractWe synthesized a new cyanide (CN−) chemosensor CX based on a nucleophilic addition reaction prompted by cyanide ion, which could be used for highly selective and sensitive fluorescence turn‐on detection of cyanide in aqueous media. The CX showed selective fluorescence recognition for CN−, the miscellaneous competitive anions (F−, Cl−, Br−, I−, AcO−, H2PO4−, HSO4−, ClO4−, S2−, PO43−, CO32− and SCN−) did not lead to any significant interference. The detection limit of the sensor towards CN− is 1.15 × 10−7 mol•L−1. The sensor has been successfully applied to estimate the cyanide ion in seeds of cherries. Test strips based on CX were fabricated, which could be used as a convenient and efficient CN− test kit to detect CN− in aqueous solution for “in‐the‐field” measurement.
Left ventricular global longitudinal strain predicts mortality and heart failure admissions in African American patients
Authors: Kansal Mayank M. , Mansour Ibrahim N. , Ismail Sahar , Bress Adam , Wu Grace , Mirza Omer , Marpadga Rahul , Gheith Hana , Kim Yoonsang , Li Yien , Cavallari Larisa , Stamos Thomas D. 
Published: March 2017

BackgroundSeveral studies have demonstrated the importance of left ventricular (LV) global longitudinal strain (GLS) as a reliable prognostic indicator in patients with heart failure (HF). These studies have included few African American (AA) patients, despite the growing prevalence and severity of HF in this patient population.Hypothesis
LV GLS predicts long‐term HF admission and all‐cause mortality in AA patients with chronic HF on optimal guideline‐directed medical therapy (GDMT).MethodsWe enrolled 207 AA adults, age 56 ± 14.5 years, with New York Heart Association (NYHA) class I through III HF on optimal GDMT from the University of Illinois HF clinic between November 2001 and February 2014. LV GLS was assessed by velocity vector imaging using 2‐, 3‐, and 4‐chamber views. Patients were followed for HF admissions and death for 3 ± 3.0 years. LV GLS value of −7.95 was used as the optimal cutoff point that maximizes sensitivity and specificityResults
LV GLS < −7.95% was significantly associated with higher all‐cause mortality and HF admissions in Kaplan‐Meier survival curves (log‐rank P < 0.001). After incorporation in multivariate Cox proportional hazard models, GLS < −7.95% was found to be an independent predictor of all‐cause mortality (hazard ratio [HR] = 4.04; 95% confidence interval [CI]: 1.07‐15.32; P = 0.04] and HF admissions (HR = 3.86; 95% CI: 1.38‐10.77; P = 0.010).ConclusionsIn AA patients with chronic stable HF on GDMT, more impaired LV GLS (< −7.95%) is a strong and independent predictor of long‐term all‐cause mortality and HF admissions.
The relationship between cardio‐ankle vascular index and subclinical atherosclerosis evaluated by cardiac computed tomographic angiography
Authors: Matsumoto Suguru , Nakanishi Rine , Luo Yanting , Kim Michael , Alani Anas , Nezarat Negin , Dailing Christopher , Budoff Matthew J. 
Published: March 2017

BackgroundThe cardio‐ankle vascular index (CAVI) is a new noninvasive index to evaluate arterial stiffness. We investigated whether CAVI can predict severity, extent, and burden of coronary artery disease by comparing results with cardiac computed tomographic angiography (CCTA).HypothesisCAVI may predict the presence of subclinical atherosclerosis.MethodsWe prospectively enrolled 95 patients (66% male; mean age, 50 ± 16 years) who underwent both CCTA and CAVI consecutively. We evaluated if CAVI correlated with (1) severe stenosis (≥50%); (2) plaque extent, determined by a segment‐involvement score (SIS), defined by the total number of coronary artery segments containing any plaque; and (3) plaque burden, determined by a segment‐stenosis score (SSS), defined by the extent of obstruction of coronary luminal diameter in individual coronary artery segments.ResultsBivariate analysis showed a statistically significant relationship not only between CAVI and SIS, but also between CAVI and SSS (r2 = 0.4, P < 0.0001 for SIS; r2 = 0.36, P < 0.0001 for SSS). Multivariable logistic analysis demonstrated that CAVI is significantly associated with SSS >5 (odds ratio [OR]: 2.3, 95% confidence interval [CI]: 1.1‐7.8, P = 0.03) and SIS >5 (OR: 2.3, 95% CI: 1.1‐5.8, P = 0.02), but not severe stenosis (OR: 1.7, 95% CI: 0.9‐4.3, P = 0.13), after adjusting for age, sex, chest pain, hypertension, dyslipidemia, family history, diabetes, and current smoking.ConclusionsWe demonstrated that CAVI had a significant relationship with subclinical coronary atherosclerosis evaluated by CCTA, especially in relation to plaque burden and plaque extent, but not severe stenosis. Thus, CAVI may reflect coronary atherosclerosis burden more than severity.
Trait dimensionality and population choice alter estimates of phenotypic dissimilarity
Authors: Carscadden Kelly A. , Cadotte Marc W. , Gilbert Benjamin 
Published: March 2017

AbstractThe ecological niche is a multi‐dimensional concept including aspects of resource use, environmental tolerance, and interspecific interactions, and the degree to which niches overlap is central to many ecological questions. Plant phenotypic traits are increasingly used as surrogates of species niches, but we lack an understanding of how key sampling decisions affect our ability to capture phenotypic differences among species. Using trait data of ecologically distinct monkeyflower (Mimulus) congeners, we employed linear discriminant analysis to determine how (1) dimensionality (the number and type of traits) and (2) variation within species influence how well measured traits reflect phenotypic differences among species. We conducted analyses using vegetative and floral traits in different combinations of up to 13 traits and compared the performance of commonly used functional traits such as specific leaf area against other morphological traits. We tested the importance of intraspecific variation by assessing how population choice changed our ability to discriminate species. Neither using key functional traits nor sampling across plant functions and organs maximized species discrimination. When using few traits, vegetative traits performed better than combinations of vegetative and floral traits or floral traits alone. Overall, including more traits increased our ability to detect phenotypic differences among species. Population choice and the number of traits used had comparable impacts on discriminating species. We addressed methodological challenges that have undermined cross‐study comparability of trait‐based approaches. Our results emphasize the importance of sampling among‐population trait variation and suggest that a high‐dimensional approach may best capture phenotypic variation among species with distinct niches.
Evaluation on Applicability to Electrical Insulating Material of Hydrocarbon‐Based Thermosetting Resin
Authors: YOSHIDA KEISUKE , KOZAKO MASAHIRO , ISHIBE SHINJI , HIKITA MASAYUKI , KAMEI NOBUHITO 
Published: March 2017

SUMMARYThis paper deals with dielectric properties of hydrocarbon‐based thermosetting resin to evaluate the applicability to electrical insulating materials. Moreover, higher withstand voltage, lower dielectric constant, and lower moisture absorption are required for the electrical insulating materials. One of the candidate polymer materials satisfying such demands is hydrocarbon‐based thermosetting resin, that is, polydicyclopentadiene (P‐DCP) and polytricyclopentadiene (P‐TCP). We measured the dielectric properties such as dielectric constant, dielectric loss, volume resistivity, and breakdown strength (BDS), and other properties such as moisture absorption, viscosity, mechanical strength, glass transition temperature, and coefficient of linear expansion of those specimens. It was found from the results in particular that P‐DCP and P‐TCP have the lower dielectric constant and the lower moisture absorption as compared with epoxy resin, while the volume resistivity and the BDS of P‐DCP and P‐TCP are not different to those of epoxy resin. As a result, it is elucidated that two kinds of hydrocarbon‐based thermosetting resin have a potential for application to an electrical insulating material.
Metabolic profiles in heart failure due to non‐ischemic cardiomyopathy at rest and under exercise
Authors: Mueller‐Hennessen Matthias , Sigl Johanna , Fuhrmann Jens C. , Witt Henning , Reszka Regina , Schmitz Oliver , Kastler Jürgen , Fischer Jenny J. , Müller Oliver J. , Giannitsis Evangelos , Weis Tanja , Frey Norbert , Katus Hugo A. 
Published: March 2017

AbstractAimsIdentification of metabolic signatures in heart failure (HF) patients and evaluation of their diagnostic potential to discriminate HF patients from healthy controls during baseline and exercise conditions.MethodsPlasma samples were collected from 22 male HF patients with non‐ischemic idiopathic cardiomyopathy and left ventricular systolic dysfunction and 19 healthy controls before (t0), at peak (t1) and 1 h after (t2) symptom‐limited cardiopulmonary exercise testing. Two hundred fifty‐two metabolites were quantified by gas chromatography‐mass spectrometry (GC‐MS) and liquid chromatography (LC)‐MS/MS‐based metabolite profiling.ResultsPlasma metabolite profiles clearly differed between HF patients and controls at t0 (P < 0.05). The metabolic signature of HF was characterized by decreased levels of complex lipids and fatty acids, notably phosphatidylcholines, cholesterol, and sphingolipids. Moreover, reduced glutamine and increased glutamate plasma levels, significantly increased purine degradation products, as well as signs of impaired glucose metabolism were observed. The metabolic differences increased strongly according to New York Heart Association functional class and the addition of three metabolites further improved prediction of exercise capacity (Q2 = 0.24 to 0.35). Despite a high number of metabolites changing significantly with exercise (30.2% at t1/t0), the number of significant alterations between HF and controls was almost unchanged at t1 and t2 (30.7 and 29.0% vs. 31.3% at t0) with a similar predictive group separation (Q2 = 0.50 for t0, 0.52 for t1, and 0.56 for t2, respectively).ConclusionsOur study identified a metabolic signature of non‐ischemic HF with prominent changes in complex lipids including phosphatidylcholines, cholesterol, and sphingolipids. The metabolic changes were already evident at rest and largely preserved under exercise.
Rumination induces a pattern of attention characterized by increased vigilance followed by avoidance of affective pain words
Authors: Brookes M.L. , Sharpe L. , Dear B.F. 
Published: March 2017

AbstractBackgroundThis study examined the effects of rumination on attentional processes in relation to an acute experimental pain task. In keeping with recent theory and research, it was hypothesized that we would identify a pattern of attentional bias characterized by enhanced initial vigilance followed by avoidance of pain‐related stimuli.MethodUndergraduate students were randomized to a rumination condition, which received threat‐inducing information about the cold pressor task, or a distraction condition. Using the dot probe task, attentional biases to sensory and affective pain words were assessed at two presentation intervals (500 and 1250 ms).ResultsThose in the rumination condition did not show differences in attentional biases compared to the control group, however, they did respond more quickly to pain congruent trials compared to neutral/neutral trials when affective pain words were presented for 500 ms. In addition, those in the rumination group responded more slowly in congruent trials to neutral/neutral trials than affective/neutral trials indicating avoidance at 1250 ms. Although those in the rumination condition exhibited higher levels of distress and reported higher levels of pain when they withdrew their hands from the cold pressor task, the congruency biases did not predict these results.ConclusionThese results suggest that experimentally manipulating rumination changes attentional processes consistent with the vigilance‐avoidance hypothesis.SignificanceThe rumination manipulation led to increased worry about pain and induced to an attentional pattern of vigilance‐avoidance for affective pain words. The induction also led to more distress and pain. Rumination and worry appear to increase unhelpful patterns of attention and could be an appropriate focus of intervention.
A Voltammetric Electronic Tongue Based on Commercial Screen‐printed Electrodes for the Analysis of Aminothiols by Differential Pulse Voltammetry
Authors: Pérez‐Ràfols Clara , Gómez Ana , Serrano Núria , Díaz‐Cruz José Manuel , Ariño Cristina , Esteban Miquel 
Published: March 2017

AbstractA voltammetric electronic tongue has been designed as a proof of concept for the analysis of aminothiols by differential pulse voltammetry and has been tested in ternary mixtures of cysteine (Cys), homocysteine (hCys) and glutathione (GSH). It consists of three screen‐printed electrodes of carbon, carbon nanofibers and gold cured at low temperature. A preliminary calibration study carried out separately for each aminothiol confirmed that, working at an optimal pH value of 7.4, every electrode produces differentiated responses for every analyte (cross‐response). As for the tongue, it was applied to calibration and validation mixtures of Cys, hCys and GSH and provided voltammograms that, baseline‐corrected, normalized and combined in different ways were submitted to partial least squares (PLS) calibration. The calibration models produced good predictions of the concentrations of all three analytes, which suggest that the proposed voltammetric tongue improves the performance of a previous design based on linear sweep voltammetric measurements under acidic conditions.
Experimental Analyses on Feasibility of Chemical‐Looping CoO/CoAl2O4 with Additive for Solar Thermal Fuel Production
Authors: Hong Hui , Zhang Hao , Han Tao , He Fengjuan , Jin Hongguang 
Published: March 2017

AbstractSolar thermal fuel production from solar heat is considered an innovative technology for the utilization of solar energy. The process of solar‐heat‐driven hydrocarbon fuel reformation is a promising approach for solar thermal fuel production. Here, perspectives on the use of solar heat at approximately 673–723 K to drive dimethyl ether (DME) reformation with a looping material of (CoO+1.0 % PtO2)/CoAl2O4 are given for the production of solar thermal fuel, and the experimental results for the thermochemical reactivity and the stability of this looping material are discussed in particular. The experimental results indicate that the synthesized (CoO+1.0 % PtO2)/CoAl2O4 shows good reactivity at a solar thermal fuel production temperature of 673–723 K, at which the conversion rate is 80–95 %. Moreover, the looping material also shows a satisfactory stable redox stability over 16 cycles. To avoid the deactivation of the looping material by carbon deposition, H2O is introduced to accompany the solar‐driven reduction of (CoO+1.0 % PtO2)/CoAl2O4 with DME. Although the PtO2 additive is expensive and not “ideal”, the results obtained in this study may provide a starting point for solar thermal fuel production from mid‐temperature solar heat using the chemical‐looping combustion of DME.
Comparative Study of Ammonia‐fueled Solid Oxide Fuel Cell Systems
Authors: Okanishi T. , Okura K. , Srifa A. , Muroyama H. , Matsui T. , Kishimoto M. , Saito M. , Iwai H. , Yoshida H. , Saito M. , Koide T. , Iwai H. , Suzuki S. , Takahashi Y. , Horiuchi T. , Yamasaki H. , Matsumoto S. , Yumoto S. , Kubo H. , Kawahara J. , Okabe A. , Kikkawa Y. , Isomura T. , Eguchi K. 
Published: March 2017

AbstractSeveral solid oxide fuel cell (SOFC) systems can be considered for the NH3 utilization. In this study, the catalytic activity and long‐term stability of the NH3 decomposition reactor with the Ni/Y2O3‐based catalysts and the autothermal NH3 cracker with the Co–Ce–Zr composite oxide catalyst were investigated. Moreover, the NH3 decomposition reactor and the autothermal NH3 cracker were combined with the SOFC stack and their performances of the stack were compared to those fueled with NH3 and H2/N2. The power output of each SOFC stack was over 200 W. Moreover, it was demonstrated that the direct NH3‐fueled SOFC stack was stable for 1,000 h at 770 °C without significant degradation.
Use of cancer antigen 125, cancer antigen 19‐9, and the neutrophil‐to‐lymphocyte ratio to diagnose mature cystic teratoma with torsion
Authors: Wang Yuan‐qiu , Xia Wei‐ting , Wang Fang , Zhuang Xin‐xin , Zheng Fei‐yun , Lin Feng 
Published: March 2017

AbstractObjectiveTo determine the efficacy of serum levels of cancer antigen 125 (CA125) and cancer antigen 19‐9 (CA19‐9), and the neutrophil‐to‐lymphocyte ratio (NLR) for diagnosis of mature cystic teratoma (MCT) with torsion.MethodsA retrospective medical record review was conducted of data for women who had undergone surgery for ovarian MCT at the First Affiliated Hospital of Wenzhou Medical University, China, between January 1, 2008, and January 1, 2015. Patients with torsion and a control group who underwent surgery on the same days were identified. Clinical characteristics and the serum levels of CA125, CA19‐9, and the NLR were assessed.ResultsThe serum levels of CA125, CA19‐9, and the NLR were higher in the torsion group (n=68) than in the control group (n=120; P≤0.001 for all). Receiver operating characteristic analysis indicated that the area under the curve for the combined use of CA125, CA19‐9, and NLR was 0.978 (95% confidence interval 0.954–1.000; P<0.001). This combination had a diagnostic sensitivity of 93.9% and a specificity of 98.3%. Moreover, levels of these inflammatory markers were significantly increased among patients with large tumor diameters (P<0.01 for all).ConclusionThe combined measurement of CA125, CA19‐9, and the NLR provided an efficient method for the diagnosis of MCT with torsion.
Determining the optimal protocol for preparing an acellular scaffold of tissue engineered small‐diameter blood vessels
Authors: Pu Lei , Wu Jian , Pan Xingna , Hou Zongliu , Zhang Jing , Chen Wenmin , Na Zhuhui , Meng Mingyao , Ni Haiyan , Wang Liqiong , Li Yaxiong , Jiang Lihong 
Published: March 2017

AbstractAlthough detergent‐based decellularization protocols have been widely used to obtain a natural extracellular matrix (ECM) scaffold in tissue engineering, some key challenges still exist. To achieve an optimum natural decellularized scaffold for the construction of tissue‐engineered small‐diameter blood vessels (TEBV), porcine carotid arteries (PCAs) were decellularized by combining sodium dodecyl sulfate (SDS), sodium deoxycholate (SDC) and Triton X‐100 (Triton) in different concentrations. Tissue samples were processed and their histological, biochemical and biomechanical characteristics were investigated. Results showed that only two methods 0.5% (SDS + SDC) and 1% (SDS + SDC) could completely remove of the cellular contents and preserve the native ECM architecture. Furthermore, 1% (SDS + SDC) based methods acquire preferable porosity and suitable mechanical strength. Residual Triton in the ECM scaffold holds intensive cytotoxity. In conclusion, 1%(SDS + SDC) based method can obtain a superior PCAs scaffold for the construction of TEBV. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 619–631, 2018.
Equimatchable Regular Graphs
Authors: Akbari Saieed , Ghodrati Amir Hossein , Hosseinzadeh Mohammad Ali , Iranmanesh Ali 
Published: March 2017

AbstractA graph is called equimatchable if all of its maximal matchings have the same size. Kawarabayashi, Plummer, and Saito showed that the only connected equimatchable 3‐regular graphs are K4 and K3, 3. We extend this result by showing that for an odd positive integer r, if G is a connected equimatchable r‐regular graph, then . Also it is proved that for an even r, a connected triangle‐free equimatchable r‐regular graph is isomorphic to one of the graphs C5, C7, and .
The effect of excitation wavelength and metallic nanostructure on SERS spectra of C60
Authors: Sinwani Miri , Muallem Merav , Tischler Yaakov R. 
Published: March 2017

Understanding the mechanisms of surface‐enhanced Raman scattering (SERS) phenomena is essential for advancing next‐generation Raman‐based chemical and biological sensors. SERS studies typically examine the excitation wavelength dependence for a given nanostructure morphology. However, more comprehension of the SERS mechanisms can be gained by investigating the combined excitation wavelength and metal morphology dependencies. Here, using a thin Au film with tapered boundaries as the Raman enhancing surface, we investigate the SERS mechanisms exhibited along the sloped region of the sample. The tapered boundaries provide controllably different Au morphologies from densified thin film to nano‐island to nanoparticle structures. A layer of Fullerene C60 was thermally evaporated uniformly across the Au film. The excitation wavelength of 532 nm generated similar SERS spectra across the Au surface, which closely matched the regular Raman scattering spectrum, thus indicating enhancement of the normal Raman modes of C60. In contrast, an excitation wavelength of 784 nm generated different SERS spectra across the boundary whose intensity from the tapered Au film surface was 10 times higher than the SERS signal from the Au thin film region. The spectral differences observed with 784‐nm excitation are indicative of an electromagnetic mechanism controlled by near field interactions of local surface plasmon resonances. Using the configuration of tapered Au films can enable fast determination of the most enhancing Au nanostructure for a given laser excitation and provide an in‐depth insight into the enhancement mechanisms associated with a particular analyte molecule, as shown here for C60. Copyright © 2017 John Wiley & Sons, Ltd.