bluuebunny/crossref_metadata_2025_split huggingface dataset:
Highly Reversible Lithium Storage in Hierarchical Ca2Ge7O16 Nanowire Arrays/Carbon Textile Anodes
Authors: Li Wenwu , Wang Xianfu , Liu Bin , Luo Sijun , Liu Zhe , Hou Xiaojuan , Xiang Qingyi , Chen Di , Shen Guozhen 
Published: May 2013

AbstractAligned Ca2Ge7O16 nanowire arrays were successfully grown on carbon textiles to form hierarchical 3D structures by using a facile hydrothermal method on a large scale. Typical Ca2Ge7O16 nanowires are single crystals that show preferred growth along the [001] direction. The 3D hierarchical structures were used as binder‐free anodes for lithium‐ion batteries, which showed the features of highly reversible capacity (900–1100 mA h g−1 at a current density of 300 mA g−1), remarkable cycling stability, even over 100 cycles, and good rate capability, with a capacity of about 500 mA h g−1 at 3 A g−1. Furthermore, highly bendable full cells were also fabricated, which showed high flexibility, with little voltage change after bending 600 times, and superior temperature tolerance within the range 4–60 °C, thus demonstrating their promising potential for applications in high‐performance lithium‐ion batteries.
Well‐Defined Molecular Magnesium Hydride Clusters: Relationship between Size and Hydrogen‐Elimination Temperature
Authors: Intemann Julia , Spielmann Jan , Sirsch Peter , Harder Sjoerd 
Published: May 2013

AbstractA new tetranuclear magnesium hydride cluster, [{NN‐(MgH)2}2], which was based on a NN‐coupled bis‐β‐diketiminate ligand (NN2−), was obtained from the reaction of [{NN‐(MgnBu)2}2] with PhSiH3. Its crystal structure reveals an almost‐tetrahedral arrangement of Mg atoms and two different sets of hydride ions, which give rise to a coupling in the NMR spectrum (J=8.5 Hz). To shed light on the relationship between the cluster size and H2 release, the thermal decomposition of [{NN‐(MgH)2}2] and two closely related systems that were based on similar ligands, that is, an octanuclear magnesium hydride cluster and a dimeric magnesium hydride species, have been investigated in detail. A lowering of the H2‐desorption temperature with decreasing cluster size is observed, in line with previously reported theoretical predictions on (MgH2)n model systems. Deuterium‐labeling studies further demonstrate that the released H2 solely originates from the oxidative coupling of two hydride ligands and not from other hydrogen sources, such as the β‐diketiminate ligands. Analysis of the DFT‐computed electron density in [{NN‐(MgH)2}2] reveals a counterintuitive interaction between two formally closed‐shell H− ligands that are separated by 3.106 Å. This weak interaction could play an important role in H2 desorption. Although the molecular product after H2 release could not be characterized experimentally, DFT calculations on the proposed decomposition product, that is, the low‐valence tetranuclear Mg(I) cluster [(NN‐Mg2)2], predict a structure with two almost‐parallel, localized MgMg bonds. As in a previously reported β‐diketiminate MgI dimer, the MgMg bond is not characterized by a bond critical point, but instead displays a local maximum of electron density midway between the atoms, that is, a non‐nuclear attractor (NNA). Interestingly, both of the NNAs in [(NN‐Mg2)2] are connected through a bond path that suggests that there is bonding between all four MgI atoms.
Uncertainty, mood states, and symptom distress in patients with primary brain tumors
Authors: Lin Lin , Chiang Hui‐Hsun , Acquaye Alvina A. , Vera‐Bolanos Elizabeth , Gilbert Mark R. , Armstrong Terri S. 
Published: May 2013

BACKGROUNDPatients with primary brain tumors (PBTs) face uncertainty related to prognosis, symptoms, treatment response, and toxicity. The authors of this report examined the direct/indirect relations among patients' uncertainty, mood states, and symptoms.METHODSIn total, 186 patients with PBTs were accrued at various points in the illness trajectory. Data‐collection tools included an investigator‐completed clinician checklist, a patient‐completed demographic data sheet, the Mishel Uncertainty in Illness Scale‐Brain Tumor Form (MUIS‐BT), the MD Anderson Symptom Inventory‐Brain Tumor Module (MDASI‐BT), and the Profile of Mood States‐Short Form (POMS‐SF). Structural equation modeling was used to explore correlations among variables.RESULTSParticipants were primarily white (80%) men (53%) with a variety of brain tumors. They ranged in age from 19 to 80 years (mean ± standard deviation, 44.2 ± 12.6 years). Lower functional status and earlier point in the illness trajectory were associated with greater uncertainty (P < .01 for both). Uncertainty (P < .05), except in the model of “confusion,” and the 5 negative mood states measured by the POMS‐SF were directly associated with symptom severity perceived by patients (P < .01 for all). The impact of uncertainty on perceived symptom severity also was mediated significantly by mood states.CONCLUSIONSThe results from the study clearly demonstrated distinct pathways for the relations between uncertainty‐mood states‐symptom severity for patients with PBTs. Uncertainty in patients with PBTs is higher for those who have a poor performance status and directly impacts negative mood states, which mediate patient‐perceived symptom severity. This conceptual model suggests that interventions designed to reduce uncertainty or that target mood states may help lessen patients' perception of symptom severity, which, in turn, may result in better treatment outcomes and quality of life. Cancer 2013;119:2796–2806. © 2013 American Cancer Society.
Pemetrexed versus erlotinib in pretreated patients with advanced non–small cell lung cancer: A Hellenic Oncology Research Group (HORG) randomized phase 3 study
Authors: Karampeazis Athanasios , Voutsina Alexandra , Souglakos John , Kentepozidis Nikos , Giassas Stelios , Christofillakis Charalambos , Kotsakis Athanasios , Papakotoulas Pavlos , Rapti Ageliki , Agelidou Maria , Agelaki Sofia , Vamvakas Lambros , Samonis George , Mavroudis Dimitris , Georgoulias Vassilis 
Published: May 2013

BACKGROUNDIn this superiority study, pemetrexed was compared with erlotinib in pre‐treated patients with metastatic non–small cell lung cancer (NSCLC).METHODSPatients with stage IIIB/IV NSCLC who progressed after first‐line or second‐line treatment were randomized to receive either pemetrexed or erlotinib. In total, 21.7% of patients in the pemetrexed arm and 23.5% of patients in the erlotinib arm had squamous cell histology, and treatment was third line in 39.2% and 46.4% of patients, respectively. The primary study endpoint was time to tumor progression (TTP). Epidermal growth factor receptor/v‐Ki‐ras2 Kirsten rat sarcoma viral oncogene homolog (EGFR/KRAS) mutation status also was investigated.RESULTSThere was no difference in terms of the TTP (P = .195), the objective response rate (P = .469), or overall survival (P = .986) between the 2 treatment arms. In patients who had squamous cell histology, erlotinib resulted in a superior TTP compared with pemetrexed (4.1 months vs 2.5 months, respectively; P = .006). The incidence of grade 3 and 4 neutropenia, thrombocytopenia, and asthenia was significantly higher in the pemetrexed arm, whereas the incidence of grade 3 and 4 skin rash was higher in the erlotinib arm.CONCLUSIONSBoth pemetrexed and erlotinib had comparable efficacy in pre‐treated patients with metastatic NSCLC, and the current results indicated that genotyping of tumor cells may have an important effect on treatment efficacy. Cancer 2013;119:2754–2764. © 2013 American Cancer Society.
Neurocircuit function in eating disorders
Authors: Friederich Hans‐Christoph , Wu Mudan , Simon Joe J. , Herzog Wolfgang 
Published: May 2013

AbstractObjective:Eating disorders are serious psychosomatic disorders with high morbidity and lifetime mortality. Inadequate response to current therapeutic interventions constitutes a challenging clinical problem. A better understanding of the underlying neurobiological mechanisms could improve psychotherapeutic and drug treatment strategies.Method:A review highlighting the current state of brain imaging in eating disorders related to the anxiety and pathological fear learning model of anorexia nervosa (AN) and the impulsivity model of binge eating in bulimia nervosa (BN).Results:Available neuroimaging studies in patients with acute AN primarily suggest a hyper‐responsive emotional and fear network to food, but not necessarily to eating disorder‐unrelated, salient stimuli. Furthermore, patients with AN show decreased activation in the ventral fronto‐striatal circuits during the performance of a cognitive flexibility task. Results in patients with BN primarily suggest a hypo‐responsive reward system to food stimuli, especially to taste reward. Additionally, patients with BN exhibit impaired brain activation in the inhibitory control network during the performance of general response–inhibition tasks.Discussion:Anxiety and pathological fear learning may lead to conditioned neural stimulus‐response patterns to food stimuli and increased cognitive rigidity, which could account for the phobic avoidance of food intake in patients with acute AN. However, further neurobiological studies are required to investigate pathological fear learning in patients with AN. Patients with BN may binge eat to compensate for a hypo‐responsive reward system. The impaired brain activation in the inhibitory control network may facilitate the loss of control over food intake in patients with BN. © 2013 by Wiley Periodicals, Inc. (Int J Eat Disord 2013; 46:425–432)
Closing the “know‐do” gap: training public health professionals in eating disorders prevention via case‐method teaching
Authors: Austin S. Bryn , Sonneville Kendrin R. 
Published: May 2013

AbstractExpansion of our societies' capacity to prevent eating disorders will require strategic integration of the topic into the curricula of professional training programs. An ideal way to integrate new content into educational programs is through the case‐method approach, a teaching method that is more effective than traditional teaching techniques. The Strategic Training Initiative for the Prevention of Eating Disorders has begun developing cases designed to be used in classroom settings to engage students in topical, high‐impact issues in public health approaches to eating disorders prevention and screening. Dissemination of these cases will provide an opportunity for students in public health training programs to learn material in a meaningful context by actively applying skills as they are learning them, helping to bridge the “know‐do” gap. The new curriculum is an important step toward realizing the goal that public health practitioners be fully equipped to address the challenge of eating disorders prevention. © 2013 by Wiley Periodicals, Inc. (Int J Eat Disord 2013; 46:533–537)
Renewable Pencil Electrodes for Highly Sensitive Anodic Stripping Voltammetric Determination of 3‐Hydroxyflavone and Morin in Bulk Form and in Biological Fluids
Authors: Temerk Yassein M. , Ibrahim Mohamed S. , Kotb Mohammed , Schuhmann Wolfgang 
Published: May 2013

AbstractAn electrochemical anodic adsorptive stripping procedure for ultra‐trace assay of 3‐hydroxyflavone (3HF) and Morin at a renewable pencil electrode (PGE) in bulk form and in biological fluids is described. The nature of the oxidation process of 3HF and Morin taking place at the PGE was characterized by cyclic voltammetry. The results show that the determination of the oxidation peak current is the basis of a simple, accurate and rapid method for quantification of 3HF by square‐wave anodic stripping voltammetry. Determination of Morin was achieved by square‐wave anodic adsorptive stripping voltammetry of the formed MorinCu(II) complex at a PGE. Factors influencing the trace measurements of 3HF and the MorinCu (II) complex at a PGE are assessed. The limits of detection and quantitation for the determination of 3HF and Morin in bulk form and in biological fluids were determined. The statistical analysis and the calibration curve data for trace determination of 3HF and Morin are reported.
Determination of Paracetamol in Presence of Ascorbic Acid in Pharmaceutical Products by Scanning Electrochemical Microscopy
Authors: Lima Alex S. , Meloni Gabriel N. , Bertotti Mauro 
Published: May 2013

AbstractThe selective amperometric determination of paracetamol in pharmaceutical formulations containing ascorbate was achieved by removing the interfering species in the diffusion layer created between a platinum substrate and a disc microelectrode in a Scanning Electrochemical Microscopy (SECM) configuration, while the target analyte was kept unconsumed. After complete depletion of ascorbate, paracetamol was detected at the SECM tip in a free‐interference solution zone. The influence of the substrate potential and the gap distance on the efficiency of ascorbate removal was systematically examined. The effectiveness of the device towards the determination of paracetamol in pharmaceutical samples was evaluated and under optimal conditions the results obtained agreed well with the labeled value.
Electrochemical DNA Biosensor Based on Partially Reduced Graphene Oxide Modified Carbon Ionic Liquid Electrode for the Detection of Transgenic Soybean A2704‐12 Gene Sequence
Authors: Sun Wei , Zhang Yuanyuan , Hu Anhui , Lu Yongxi , Shi Fan , Lei Bingxin , Sun Zhenfan 
Published: May 2013

AbstractIn this work a partially reduced graphene oxide (p‐RGO) modified carbon ionic liquid electrode (CILE) was prepared as the platform to fabricate an electrochemical DNA sensor, which was used for the sensitive detection of target ssDNA sequence related to transgenic soybean A2704‐12 sequence. The CILE was fabricated by using 1‐butylpyridinium hexafluorophosphate as the binder and then p‐RGO was deposited on the surface of CILE by controlling the electroreduction conditions. NH2 modified ssDNA probe sequences were immobilized on the electrode surface via covalent bonds between the unreduced oxygen groups on the p‐RGO surface and the amine group at the 5′‐end of ssDNA, which was denoted as ssDNA/p‐RGO/CILE and further used to hybridize with the target ssDNA sequence. Methylene blue (MB) was used as electrochemical indicator to monitor the DNA hybridization. The reduction peak current of MB after hybridization was proportional to the concentration of target A2704‐12 ssDNA sequences in the range from 1.0×10−12 to 1.0×10−6 mol/L with a detection limit of 2.9×10−13 mol/L (3σ). The electrochemical DNA biosensor was further used for the detection of PCR products of transgenic soybean with satisfactory results.
REGIONAL DISPARITIES IN SELF‐REPORTED HEALTH: EVIDENCE FROM CHINESE OLDER ADULTS
Authors: Mu Ren 
Published: May 2013

ABSTRACTDespite the subjectivity inherent in individuals' interpretation of good health, self‐reported health is widely used in health‐related studies. With data from the pilot survey of the new China Health and Retirement Longitudinal Study, this paper applies the vignette method to control for differences in individual response scales and examines regional differences in self‐reported health among the elderly in China. The results show that people in different provinces seem to use different criteria when assessing their health conditions. Regional health disparities are underestimated if differentials in response scales are not accounted for. A substantial share of the disparities cannot be explained by the observed differences in respondents' chronic health condition, demographic characteristics, and household wealth, a finding confirmed by a test based on inpatient‐care information. Copyright © 2013 John Wiley & Sons, Ltd.
Earthquake cycle deformation in the Tibetan plateau with a weak mid‐crustal layer
Authors: DeVries Phoebe M. R. , Meade Brendan J. 
Published: May 2013

AbstractGeodetic observations of interseismic deformation across the Tibetan plateau contain information about both tectonic and earthquake cycle processes. Time‐variations in surface velocities between large earthquakes are sensitive to the rheological structure of the subseismogenic crust, and, in particular, the viscosity of the middle and lower crust. Here we develop a semianalytic solution for time‐dependent interseismic velocities resulting from viscoelastic stress relaxation in a localized midcrustal layer in response to forcing by a sequence of periodic earthquakes. Earthquake cycle models with a weak midcrustal layer exhibit substantially more near‐fault preseismic strain localization than do classic two‐layer models at short (<100 yr) Maxwell times. We apply both this three‐layer model and the classic two‐layer model to geodetic observations before and after the 1997 MW = 7.6 Manyi and 2001 MW = 7.8 Kokoxili strike‐slip earthquakes in Tibet to estimate the viscosity of the crust below a 20 km thick seismogenic layer. For these events, interseismic stress relaxation in a weak (viscosity ≤1018.5 Pa⋅s) and thin (height ≤20 km) midcrustal layer explains observations of both preseismic near‐fault strain localization and rapid (>50 mm/yr) postseismic velocities in the years following the coseismic ruptures. We suggest that earthquake cycle models with a localized midcrustal layer can simultaneously explain both preseismic and postseismic geodetic observations with a single Maxwell viscosity, while the classic two‐layer model requires a rheology with multiple relaxation time scales.
Petro‐fabrics and seismic properties of blueschist and eclogite in the North Qilian suture zone, NW China: Implications for the low‐velocity upper layer in subducting slab, trench‐parallel seismic anisotropy, and eclogite detectability in the subduction zone
Authors: Cao Yi , Jung Haemyeong , Song Shuguang 
Published: May 2013

AbstractThe potential seismological contributions of metamorphosed and deformed oceanic crust in a subduction zone environment were studied in a detailed petro‐fabric analysis of blueschist and eclogite in the North Qilian suture zone, NW China. The calculated whole‐rock seismic properties based on the measured lattice preferred orientations of the constituting minerals show increasing P‐wave and S‐wave velocities and decreasing seismic anisotropies from blueschist to eclogite, mainly due to the decreasing volume proportion and deformation extent of glaucophane. The low velocity of the upper layer in the subducting oceanic crust can be explained by the existence of blueschist and foliated eclogite, which induces a 3–12% reduction in velocity compared to that induced by the surrounding mantle rocks. This low‐velocity layer may gradually disappear when blueschist and foliated eclogite are replaced by massive eclogite at a depth in excess of 60–75 km for the paleo North Qilian subduction zone. Trench‐parallel seismic anisotropy with a moderate delay time (0.1–0.3 s) can only effectively contribute to deformed blueschist and eclogite in a high‐angle (>45–60°) subducting slab, regardless of the direction of slab movement. The calculated reflection coefficients (Rc = 0.04–0.20) at the lithologic interfaces between eclogite and blueschist imply that it may be possible to detect eclogite bodies in shallow subduction channels using high‐resolution seismic reflection profiles. However, the imaging of eclogite bodies located in deep subduction zones could be challenging.
The role of weekly high‐activated positive mood, context, and personality in innovative work behavior: A multilevel and interactional model
Authors: Madrid Hector P. , Patterson Malcolm G. , Birdi Kamal S. , Leiva Pedro I. , Kausel Edgar E. 
Published: May 2013

SummaryThis article proposed and tested a multilevel and interactional model of individual innovation in which weekly moods represent a core construct between context, personality, and innovative work behavior. Adopting the circumplex model of affect, innovative work behavior is proposed as resulting from weekly positive and high‐activated mood. Furthermore, drawing on the Big Five model of personality and cognitive appraisal theory, openness to experience and support for innovation are proposed as individual and contextual variables, respectively, which interplay in this process. Openness to experience interacts with support for innovation leading to high‐activated positive mood. Furthermore, openness interacts with these feelings leading to greater levels of innovative work behavior. Overall, the model entails a moderated mediation process where weekly high‐activated positive mood represents a crucial variable for transforming contextual and individual resources into innovative outcomes. These propositions were tested and supported using a diary methodology and multilevel structural equation modeling, on the basis of 893 observations of innovative work behavior and moods nested in 10 weekly waves of data. This information was collected from 92 individuals of diverse occupations employed in 73 distinct companies. Theoretical and practical implications are discussed. Copyright © 2013 John Wiley & Sons, Ltd.
Multiobjective Optimization for the Asset Allocation of European Nonlife Insurance Companies
Authors: Jarraya Bilel , Bouri Abdelfettah 
Published: May 2013

ABSTRACTAn optimal asset allocation is crucial for nonlife insurance companies. The most previous studies focused on this topic use a mono‐objective technique optimization. This technique usually allows the maximization of shareholders' expected utility. As nonlife insurance company is a complex system, it has many stakeholders other than shareholders. So, the satisfaction of the shareholders' expected utility cannot lead usually to the satisfaction of other stakeholders' objectives. Therefore, the focus on utility maximization can be a destruction source of other objectives such as productivity, competitiveness and solvency. Our developed model integrates simulation approach with a multiobjective particle swarm optimization algorithm. This model insures an optimal asset allocation that maximizes, simultaneously, shareholders expected utility and technical efficiency of European nonlife insurance companies. The empirical application conducts a comparison between the attained results with multiobjective optimization technique and mono‐objective technique to search the optimal asset allocation for nonlife insurance companies. Our results show that the investment portfolio will be more diversified between most available investment assets. In addition, any decision maker should take account of different stakeholders' objectives. Accordingly, multiobjective optimization allows us to find the best asset allocation that maximizes simultaneously expected utility and technical efficiency of nonlife insurance companies. Copyright © 2013 John Wiley & Sons, Ltd.
Post‐optimal Analysis for Markowitz's Multicriteria Portfolio Optimization Problem
Authors: Emelichev Vladimir , Korotkov Vladimir , Nikulin Yury 
Published: May 2013

ABSTRACTWe formulate a multicriteria discrete variant of well‐known Markowitz's portfolio optimization model with Savage's ordered minimax risk criteria. We constructed lower and upper bounds of the stability radius of a lexicographic optimum (portfolio) in the case of linear metric l1 in three‐dimension space of the problem parameters. Copyright © 2013 John Wiley & Sons, Ltd.