bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Information Content of Trading Activity and Quote Changes: Evidence from VIX Options
Authors: Tsai Wei‐Che , Chiu Ying‐Tzu , Wang Yaw‐Huei 
Published: January 2015

AbstractWe investigate the informational role of trading volume and quote changes in VIX options with regard to future movements in the index, based upon a high‐frequency framework. Our results reveal that whilst volume imbalances convey no significant predictive information, quote changes in VIX options can significantly predict changes in the index, with this predictive power being more pronounced for VIX calls around monetary policy announcement periods. Our findings imply that when acting on market‐wide information, traders in VIX options may prefer to submit limit orders, as opposed to market orders, leading to such information being contained in the quote changes. © 2015 Wiley Periodicals, Inc. Jrl Fut Mark 35:715–737, 2015
Health Insurance, Health Savings Accounts and Healthcare Utilization
Authors: Peter Richard , Soika Sebastian , Steinorth Petra 
Published: January 2015

SummaryAssuming symmetric information, we show that a high‐deductible health plan (HDHP) combined with a tax‐favored health savings account (HSA) induces more savings and less treatment compared with a full coverage plan under reasonable risk preferences. Furthermore, a higher tax subsidy increases savings in any case but decreases medical utilization if and only if treatment expenses are above the deductible. A larger deductible increases savings but does not necessarily decrease healthcare utilization.Whether an HDHP/HSA combination is preferred over a full coverage contract depends on absolute risk aversion. A higher tax advantage increases the attractiveness of an HDHP/HSA combination, whereas the effects of changes in the deductible are ambiguous. The paper shows that a potential regulator needs to carefully set the size of the deductible as only in a certain corridor of the probability of sickness, its effect on aggregate healthcare costs are unambiguously favorable. Copyright © 2015 John Wiley & Sons, Ltd.
Combined chemical oxidation and biological processes for herbicide degradation
Authors: Benzaquén Tamara B , Isla Miguel A , Alfano Orlando M 
Published: January 2015

AbstractBACKGROUNDFenton and photo‐Fenton processes were explored as photochemical pre‐treatments to improve the biodegradability of wastewater containing atrazine, a commercial pesticide. The effects of H2O2, Fe3+ and irradiation level on the degradation processes were studied and the optimal conditions determined.RESULTSFenton and photo‐Fenton oxidation systems were able to remove 85 and 100% of atrazine, respectively, in a 120 min period. These processes produced a biocompatible solution, removing 100% of the initial biorecalcitrant compound; however, cyanuric acid remained in the effluent after the chemical oxidation treatment due to the stability of the N‐heterocyclic ring of this acid. Nevertheless, it was found that the cyanuric acid remaining from the photo‐oxidative process can be removed by means of an anaerobic treatment.CONCLUSIONSThe results obtained in this work indicate that a coupled photo‐Fenton–biological treatment system is a feasible method to achieve the complete mineralization of biorecalcitrant pollutants such as atrazine. © 2015 Society of Chemical Industry
Biogenic amines in Zamorano cheese: factors involved in their accumulation
Authors: Combarros‐Fuertes Patricia , Fernández Domingo , Arenas Ricardo , Diezhandino Isabel , Tornadijo Maria Eugenia , Fresno José María 
Published: January 2015

AbstractBACKGROUNDRipened cheese is among fermented food the most often associated with food poisoning from biogenic amines. The influence of ripening time, heat treatment of milk and the effect of using milk from a different ewe breed on the biogenic amine (BA) content of Zamorano cheese was studied by high‐performance liquid chromatography. Physicochemical, proteolytic and microbiological parameters were also studied.RESULTSBA content increased significantly during ripening and their final values were around 400 mg kg−1. Cheeses elaborated with raw milk duplicated the concentration of BA relative to those elaborated with pasteurized milk (72 °C for 20 s). The average levels of putrescine, spermine and tyramine were higher in cheeses made with a greater proportion of milk from Churra breed. Significant differences in microbial counts and nitrogen soluble in 5% phosphotungstic acid were observed between the different batches.CONCLUSIONRipening time and heat treatment applied to milk were the factors that exercised the greatest influence upon the concentration of BA in Zamorano cheese. © 2015 Society of Chemical Industry
Kinetics and Thermodynamics of Formation and Electron‐Transfer Reactions of Surfactant Cobalt(III) Complexes Containing Polypyridyl Ligands with Fe(CN)64−in Microheterogeneous Environment
Authors: Nagaraj Karuppiah , Murugan Krishnan Senthil , Thangamuniyandi Pilavadi , Sakthinathan Subramanian 
Published: January 2015

ABSTRACTThe electron‐transfer reaction of some surfactant cobalt(III) complexes,cis‐[Co(ip)2(C12H25NH2)2]3+1,cis‐[Co(dpq)2(C12H25NH2)2]3+2, andcis‐[Co(dpqc)2(C12H25NH2)2]3+3(ip = imidazo[4,5‐f][1,10]phenanthroline, dpq = dipyrido[3,2‐d:2′‐3′‐f]quinoxaline, dpqc = dipyrido[3,2‐a:2′,4′‐c](6,7,8,9‐tetrahydro)phenazine, C12H25NH2= dodecylamine) with the Fe(CN)64−ion has been investigated in microheterogeneous media (micelles, β‐cyclodextrin) at different temperatures by the spectrophotometric method under pseudo‐first‐order conditions using an excess of the reductant. Experimentally, the reaction was found to be second order and the electron transfer postulated as an outer sphere. The rate constant for the electron‐transfer reaction in micelles was found to increase with an increase in the initial concentration of the surfactant–cobalt(III) complex. This peculiar behavior of dependence of the second‐order rate constant on the initial concentration of one of the reactants has been attributed to the presence of various concentrations of micelles under different initial concentrations of the surfactant–cobalt(III) complex in the reaction medium. Inclusion of the long aliphatic chain of the surfactant complex ion into β‐cyclodextrin leads to decrease in the rate constant. Kinetic data and activation parameters are interpreted in terms of an outer‐sphere electron‐transfer mechanism. All these results have been interpreted in terms of the hydrophobic effect and the reactants with the opposite charge.
Hydrogen Bonding in Aprotic Solvents, a New Strategy for Gelation of Bioinspired Catecholic Copolymers with N‐Isopropylamide
Authors: Vatankhah‐Varnoosfaderani Mohammad , GhavamiNejad Amin , Hashmi Saud , Stadler Florian J. 
Published: January 2015

Copolymers of N‐isopropylacrylamide (NIPAM) and dopamine methacrylate can establish a reversible, self‐healing 3D network in aprotic solvents based on hydrogen bonding. The reactivity and hydrogen bonding formation of catechol groups in copolymer chains are studied by UV–vis and 1H NMR spectroscopy, while reversibility from sol to gel and inverse as well as self‐healing properties are tested rheologically. The produced reversible organogel can self‐encapsulate physically interacting or chemically bonded solutes such as drugs due to thermosensitivity of the used copolymer. This system offers dual‐targeted and controlled drug delivery and release—by slowing down release kinetics by supramolecular bonding of the drug and by reducing diffusion rates due to modulus increase.
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Fabrication of High‐Resolution 4,82‐Type Archimedean Nanolattices Composed of Solution Processable Spin Cross‐Over Fe(II) Metallosupramolecular Polymers
Authors: Venkataramudu Uppari , Chandrasekhar Naisa , Basak Supratim , Prasad Muvva D. , Chandrasekar Rajadurai 
Published: January 2015

This paper presents the synthesis of two highly soluble Fe(II) metallosupramolecular polymers with two counter anions from a novel back‐to‐back coupled hybrid ligand. The spin cross‐over (SCO) temperature of polymers with BF4 and ClO4 counter anions is T1/2 = 313 K and T1/2 = 326 K, respectively. By following the top‐down approach, one of the polymers (with ClO4 counter anion) is successfully solution processed using a lithographically controlled wetting technique to create laser readable high‐resolution Archimedean (4,82) nanolattices (consist of diamagnetic octagons and SCO squares). The thickness and top area of each SCO square are ≈75 nm and ≈2 × 2 μm2, respectively.
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Entacapone and Prostate Cancer Risk in Patients With Parkinson's Disease
Authors: Korhonen Pasi , Kuoppamäki Mikko , Prami Tuire , Hoti Fabian , Christopher Solomon , Ellmén Juha , Aho Valtteri , Vahteristo Mikko , Pukkala Eero , Haukka Jari 
Published: January 2015

ABSTRACTBackgroundThe association between Parkinson's disease (PD) and prostate cancer, both common in elderly men, is disputable. In the STRIDE‐PD study, prostate cancer developed in 9 patients (3.7%) receiving levodopa/carbidopa with entacapone, a catechol‐O‐methyltransferase inhibitor, versus 2 cases (0.9%) without entacapone. The current pharmacoepidemiological study aimed to determine whether entacapone increases prostate cancer incidence or mortality in PD patients and whether cumulative exposure affects these rates.MethodsWe performed a retrospective cohort study using population‐wide health care registers with patient‐level linkage. Prostate cancer incidence and mortality were modeled by Cox's proportional hazards models.Results and ConclusionsUse of entacapone with l‐dopa/dopa decarboxylase inhibitor caused no increased risk of prostate cancer incidence (hazard ratio [HR]: 1.05; 95% confidence interval: 0.76‐1.44) or mortality (0.93; 0.43‐1.98). The HR for cumulative entacapone use of >360 days versus never‐use was 0.82 (0.56‐1.18) for prostate cancer incidence and 1.27 (0.60‐2.72) for prostate cancer mortality. © 2015 International Parkinson and Movement Disorder Society © 2015 International Parkinson and Movement Disorder Society
Cocoa flavonoids protect hepatic cells against high‐glucose‐induced oxidative stress: Relevance of MAPKs
Authors: Cordero‐Herrera Isabel , Martín María Angeles , Goya Luis , Ramos Sonia 
Published: January 2015

ScopeOxidative stress plays a main role in the pathogenesis of type 2 diabetes mellitus. Cocoa and (‐)‐epicatechin (EC), a main cocoa flavanol, have been suggested to exert beneficial effects in type 2 diabetes mellitus because of their protective effects against oxidative stress and insulin‐like properties. In this study, the protective effect of EC and a cocoa phenolic extract (CPE) against oxidative stress induced by a high‐glucose challenge, which causes insulin resistance, was investigated on hepatic HepG2 cells.Methods and resultsOxidative status, phosphorylated mitogen‐activated protein kinases (MAPKs), nuclear factor E2 related factor 2 (Nrf2) and p‐(Ser)‐IRS‐1 expression, and glucose uptake were evaluated. EC and CPE regulated antioxidant enzymes and activated extracellular‐regulated kinase and Nrf2. EC and CPE pre‐treatment prevented high‐glucose‐induced antioxidant defences and p‐MAPKs, and maintained Nrf2 stimulation. The presence of selective MAPK inhibitors induced changes in redox status, glucose uptake, p‐(Ser)‐ and total IRS‐1 levels that were observed in CPE‐mediated protection.ConclusionEC and CPE recovered redox status of insulin‐resistant HepG2 cells, suggesting that the functionality in EC‐ and CPE‐treated cells was protected against high‐glucose‐induced oxidative insult. CPE beneficial effects on redox balance and insulin resistance were mediated by targeting MAPKs.
Zero TEMR bone imaging in the head
Authors: Wiesinger Florian , Sacolick Laura I. , Menini Anne , Kaushik Sandeep S. , Ahn Sangtae , Veit‐Haibach Patrick , Delso Gaspar , Shanbhag Dattesh D. 
Published: January 2015

PurposeTo investigate proton density (PD)‐weighted zero TE (ZT) imaging for morphological depiction and segmentation of cranial bone structures.MethodsA rotating ultra‐fast imaging sequence (RUFIS) type ZT pulse sequence was developed and optimized for 1) efficient capture of short T2 bone signals and 2) flat PD response for soft‐tissues. An inverse logarithmic image scaling (i.e., −log(image)) was used to highlight bone and differentiate it from surrounding soft‐tissue and air. Furthermore, a histogram‐based bias‐correction method was developed for subsequent threshold‐based air, soft‐tissue, and bone segmentation.ResultsPD‐weighted ZT imaging in combination with an inverse logarithmic scaling was found to provide excellent depiction of cranial bone structures. In combination with bias correction, also excellent segmentation results were achieved. A two‐dimensional histogram analysis demonstrates a strong, approximately linear correlation between inverse log‐scaled ZT and low‐dose CT for Hounsfield units (HU) between −300 HU and 1,500 HU (corresponding to soft‐tissue and bone).ConclusionsPD‐weighted ZT imaging provides robust and efficient depiction of bone structures in the head, with an excellent contrast between air, soft‐tissue, and bone. Besides structural bone imaging, the presented method is expected to be of relevance for attenuation correction in positron emission tomography (PET)/MR and MR‐based radiation therapy planning. Magn Reson Med 75:107–114, 2016. © 2015 Wiley Periodicals, Inc.
Effects of pore water pressure dissipation on rate dependency of shear strength in localised failure of soils
Authors: Puzrin Alexander M. , Randolph Mark F. 
Published: January 2015

SUMMARYThe paper presents analytical solutions for the evolution of excess pore pressures in the vicinity of a shear band in a rate‐dependent, strain‐softening permeable soil, with the aim to explore, both qualitatively and quantitatively, the potential variation of failure shear stress in the shear band. The solutions encompass both dissipation of a pre‐existing pore pressure regime within the main soil domain, and the effects of generation of additional pore pressure within the shear band itself. The simplified analytical solutions were checked by numerical inversion of exact solutions in Laplace transform space, confirming their high accuracy. The solutions show that it is possible for the failure shear stress to rise initially because of short‐term dissipation of the pre‐existing excess pore pressure at a faster rate than generation of new excess pore pressure within the shear band. This apparent strain hardening in a strain‐softening soil can be misleading in that it can temporarily slow down the sliding mass and create a false sense of stabilization of the slope. It can also result in additional temporary shear resistance for sliding foundations or pipelines on the seabed. Copyright © 2015 John Wiley & Sons, Ltd.
Strong Army Couples: A Case Study of Rekindling Marriage After Combat Deployment
Authors: Melvin Kristal C. , Wenzel Jennifer , Jennings Bonnie Mowinski 
Published: January 2015

AbstractPost‐traumatic stress symptoms (PTSS), occurring in 15% of combat‐exposed military personnel, are associated with a decrease in couples' relationship quality. The purpose of this analysis was to describe reintegration in Army couples with high couple functioning, despite PTSS in one or both partners. Reintegration refers to readjustment after deployment; returning to previous role(s). In a mixed‐methods case study of Army couples with a history of combat deployment, we used existing quantitative data to define sampling boundaries, select cases, and guide interviews. Couples scoring high on couple functioning, resilience, and couple satisfaction were interviewed (N = 5 couples, 10 participants). “Rekindling marriage” required strategies to overcome challenges during couple reintegration. For participants as individuals, those strategies were allowing negative emotions, giving each other time and space to do the work of rediscovery and accepting a changed reality, and recognizing and addressing individual needs of the other. As couples, strategies were to go with the flow, open your heart, become best friends, maintain trust, and communicate effectively. As families, strategies were to normalize schedules and protect family time. Findings offer a preliminary basis for interventions to promote strong relationships for military couples with PTSS. © 2014 Wiley Periodicals, Inc.
Optimization of CdS buffer layer for high‐performance Cu2ZnSnSe4 solar cells and the effects of light soaking: elimination of crossover and red kink
Authors: Neuschitzer Markus , Sanchez Yudania , López‐Marino Simon , Xie Haibing , Fairbrother Andrew , Placidi Marcel , Haass Stefan , Izquierdo‐Roca Victor , Perez‐Rodriguez Alejandro , Saucedo Edgardo 
Published: January 2015

AbstractA spike‐like conduction band alignment of kesterite absorbers with a CdS buffer layer is one of the key factors for high‐performance solar cells using this buffer/absorber heterojunction combination. However, it can also be the origin of fill factor and current‐reducing distortions in current–voltage curves, such as light/dark curve crossover, or an s‐like curve shape for long wavelength monochromatic illumination (red kink) if light‐dependent defect states are present in the buffer layer. In this work, we show that by changing the cadmium precursor source from sulfate to nitrate salts for the chemical bath deposited cadmium sulfide for Cu2ZnSnSnSe4/CdS heterojunction solar cells red kink can be eliminated, and crossover greatly improved (and eliminated entirely after light soaking). These improvements lead to a decrease in series resistance and an increase in fill factor and increase power conversion efficiency from 7.0% to 8.2%. We attribute this improvement to a reduction of deep level acceptor‐like traps states inside the CdS layer, which are responsible for an increase of the conduction band spike up to a current blocking value for the sulfate precursor case. Furthermore, the effects of light soaking will be discussed. Copyright © 2015 John Wiley & Sons, Ltd.
Patient and physician reports of the information provided about illness and treatment: what matters for patients' adaptation to cancer during treatment?
Authors: Paschali Antonia A. , Hadjulis Michael , Papadimitriou Angela , Karademas Evangelos C. 
Published: January 2015

AbstractObjective: The aim of this study was to examine (a) whether illness representations mediate the relation of the amount of information provided by physicians to patients' adaptation to illness; (b) whether patient–physician agreement on the information provided impacts the aforementioned relationship. The study focused on information that, according to the Common Sense Self‐Regulation Model, is essential for adaptation to illness.Methods: The sample consisted of 93 patients undergoing chemotherapy and their physicians. Indirect (mediation) effects and conditional (moderated) indirect effects were examined using bootstrapping.Results: The more illness and treatment‐related information was provided by physicians, the more positive illness representations (specifically, illness consequences, emotional representations, and personal control) were reported by patients. In turn, these illness representations were related to better physical functioning and better adjustment to cancer. The degree of the patient–physician agreement on the information provided did not affect this relationship.Conclusions: What seems to be more crucial for patients' adaptation to cancer during treatment is the amount of information provided by physicians rather than their agreement with patients on the information provided. Also, there is a need to thoroughly examine the pathways through which information provision impacts adaptation to illness.Copyright © 2015 John Wiley & Sons, Ltd.
Nematicidal activity of acetophenones and chalcones against Meloidogyne incognita and structure–activity considerations
Authors: Caboni Pierluigi , Aissani Nadhem , Demurtas Monica , Ntalli Nikoletta , Onnis Valentina 
Published: January 2015

AbstractBACKGROUNDWith the ultimate goal of identifying new compounds active against root‐knot nematodes, a set of 14 substituted chalcones were synthesised, starting from acetophenones. These chalcones and various acetophenones were tested in vitro against Meloidogyne incognita.RESULTSThe most potent acetophenones were 4‐nitroacetophenone and 4‐iodoacetophenone, with EC50/24 h values of 12 ± 5 and 15 ± 4 mg L−1 respectively, somewhat weaker than that of the chemical control fosthiazate in our previous experiments (EC50/24 h 0.4 ± 0.3 mg L−1). When we converted the acetophenones to chalcones, the nematicidal activity differed, based on their substitution pattern. The condensation of 4‐nitroacetophenone with 2,4,6‐trihydroxybenzaldehyde to give the corresponding chalcone (E)‐1‐(4‐nitrophenyl)‐3‐(2,4,6‐trihydroxyphenyl)prop‐2‐en‐1‐one led to a slight reduction in activity (EC50/24 h value 25 ± 17 mg L−1). Moreover, (E)‐3‐(2‐hydroxy‐5‐iodophenyl)‐1‐(4‐methoxyphenyl)prop‐2‐en‐1‐one showed better activity (EC50/24 h value 26 ± 15 mg L−1) than 4‐methoxyacetophenone (EC50/24 h value 43 ± 10 mg L−1).CONCLUSIONSAcetophenones and chalcones may represent good leads in the discovery of new nematicidal compounds and may have potential use in crop management as active ingredients. © 2015 Society of Chemical Industry
A Landscape‐Based Regionalization of Natural Flow Regimes in the Ebro River Basin and Its Biological Validation
Authors: Solans M. A. , Mellado‐Díaz A. 
Published: January 2015

AbstractFlow prediction in ungauged basins is an important task for water resources planning and management, and remains a fundamental challenge for hydroecological research. Based on a previous classification of streams and rivers in the Ebro River basin (Spain), where six natural flow‐regime types were identified, we apply a new predictive approach of the flow regime type based on climatic and physiographic descriptors. We used a set of easily available environmental variables as discriminant parameters: annual precipitation, annual evapotranspiration, annual air temperature, elevation, catchment area, drainage density and geology. A stepwise landscape‐based classification procedure consisting of several stepwise discriminant analyses and canonical discriminant analyses allocated a set of sites with poor or no natural flow data into the flow types defined. Misclassification rates obtained by cross‐validation ranged between 1.12% and 11.9%. Additionally, the ecological soundness of the proposed regionalization was tested by the concordance between macroinvertebrate communities and the proposed classification using NMDS and ANOSIM. NMDS resulted in a clear separation of sites into five NFR classes with available macroinvertebrate data, and ANOSIM found significant differences in macroinvertebrate communities among classes. Copyright © 2014 John Wiley & Sons, Ltd.