bluuebunny/crossref_metadata_2025_split huggingface dataset:
Adsorption behavior of Pt embedded on N‐doped graphene sheets toward NO and NH3 molecules
Authors: Gao Zhengyang , Li Xiang , Li Ang , Ma Chuanzhi , Liu Xiaoshuo , Yang Jianmeng , Yang Weijie 
Published: July 2019

NO and NH3 are key gases involved in the selective catalytic reduction reaction. To gain insight of gas adsorption characteristics, Pt‐decorated graphene with four different graphene‐based supports for adsorbing NO and NH3 has been investigated by first‐principles density functional theory (DFT) calculations. The adsorption structure, adsorption energy, charge distribution and electronic properties of NO and NH3 on Pt/xN‐GN surface are thoroughly explored. Additionally, density of states and Fermi softness are calculated to analyze the support effects. It is found that NO is strongly adsorbed on Pt/xN‐GN with considerable adsorption energy of 1.68–4.41 eV, while NH3 is relatively weaker adsorbed on the same catalysts with adsorption energy of 0.84–1.79 eV. In addition, Fermi softness and bond length of Pt atom and N atom of adsorbate were found to be effective descriptors of adsorption on the Pt/xN‐GN surface. Our work reveals that Pt/xN‐GN can adsorb NO and NH3 well, which may be a useful clue for following selective catalytic reduction reaction.
Electrical percolation of silicone rubber filled by carbon black and carbon nanotubes researched by the Monte Carlo simulation
Authors: Lu Yingchun , Wu Hao , Liu Jian , Liu Yue , Zhao Junnan , Liu Ping , Wang Junfeng , Liang Huaguo , Huang Ying , Song Aiguo 
Published: July 2019

ABSTRACTElectrical percolation of carbon black (CB) and carbon nanotubes (CNTs) filled into silicone rubber (SR) is analyzed by the three‐dimensional (3D) Monte Carlo simulation. First, the 3D models and simulation parameters of CB and CNTs are researched to narrow the deviation between simulation and experimental results of CB/SR and CNTs/SR. The degree of agglomeration is the most important parameter in simulation for CB. The 3D model of CNTs is the most important factor in simulation for CNTs. Then, the 3D Monte Carlo simulation for CB/CNTs/SR is developed based on the optimized 3D models and parameters of CB and CNTs. The results yielded by the simulation with optimized parameters are similar to the experiments and synergistic conductive effect of two hybrid fillers in nanocomposites exists. This work has demonstrated that the quantification of the electrical percolation of two hybrid fillers in nanocomposites by Monte Carlo simulation is feasible. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48222.
Nonlinear resistivity in epoxy composites containing Mn‐based ferrite magnetic particles
Authors: Matsuzaki Hidehito , Suzuki Akifumi , Naka Yumiko , Le Khoa V. , Sasaki Takeo 
Published: July 2019

ABSTRACTIn this study, magnetic particles were employed as nonlinear resistive materials in electric stress grading composites. Epoxy resin films containing either manganese‐based ferrite magnetic (Mn‐FM) particles or manganese‐magnesium‐based ferrite magnetic particles were prepared, and the threshold voltages required for these films to exhibit nonlinear resistivity were determined. The sample containing Mn‐FM particles having irregular shapes [Mn‐FM(i)] at 20 vol % showed the highest nonlinear resistivity. Assessments of the magnetic characteristics of these materials demonstrated a relationship between magnetic flux density and nonlinear resistivity. The magnetic flux density of the Mn‐FM(i) composite was the highest among the various specimens, indicating that magnetic flux density may affect nonlinear resistivity. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48229.
Preparation and properties of thermosetting powder/graphene oxide coatings for anticorrosion application
Authors: Li Xin , Wang Fei , Mao Jian 
Published: July 2019

ABSTRACTThe goal of this research was to simplify the preparation process of graphene‐contained powder coatings for metal anticorrosion. To do this, thermosetting powder/graphene oxide (TP@GO) composites were prepared via a facile planetary ball‐milling technique and were painted onto tinplates by electrostatic spraying. After immersion in a 3.5 wt % NaCl solution for 9 days, potentiodynamic polarization curves revealed superior anticorrosion performance for the 1.5 wt % graphene oxide coating (TP@GO15), providing 74.1% decreased corrosion current and 34.2% increased corrosion potential compared to pure thermosetting powder coating. After 48 days of immersion, the electrochemical impedance spectroscopy analysis of the prepared materials revealed that the anticorrosion properties were in the sequence TP < TP@GO10 < TP@GO20 < TP@GO15. The results indicated that addition of moderate amount of graphene oxide to prepare TP@GO coatings can significantly promote the anticorrosion performance of metals. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48264.
Corrosion protection by epoxy/poly(aniline‐co‐pyrrole)/ZnO nanocomposite coating
Authors: Golshekan Mostafa , Shirini Farhad 
Published: July 2019

ABSTRACTAnticorrosion behavior of epoxy/poly(aniline‐co‐pyrrole)/ZnO (EPAPZ) coating on stainless steel 304 alloys is investigated using the electrochemical impedance spectroscopy (EIS) method, and the coating is compared with epoxy/polyaniline/ZnO (EPAZ) and pure epoxy (EP) coatings. Scanning electron microscopy images are used for structural characterization and to compare the particle size of nanoparticles. EIS result showed that coating resistance for EPAPZ, EPAZ, and EP coatings after 90 days of immersion in 3.5% NaCl was 1.18 × 107, 1.08 × 106, and 4.28 × 104 Ω cm−2, respectively. In addition, the volume percentage of water absorbed by the coating, which could be obtained by coating capacitance, is 2.81, 4.21, and 9.11, respectively. Immersion tests showed 0.063, 0.194, and 0.752% of weight loss in the metals under EPAPZ, EPAZ, and EP coatings, respectively. These results show that the EPAPZ coating has superior anticorrosive performance compared with EPAZ and EP coatings. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2019,136, 48265.
Eco‐friendly thermal insulation material from cellulose nanofibre
Authors: Jose Jasmine , Thomas Vinoy , Raj Archana , John Jancy , Mathew Raji Mary , Vinod Vrinda , Rejeena Ibrahimkutty , Mathew Sebastian , Abraham Rani , Mujeeb Abdulhassan 
Published: July 2019

ABSTRACTNano cellulose is a material of current interest that has attracted considerable attention from researchers due to its interesting properties such as low toxicity, availability, natural abundance, biodegradability, and flexible surface chemistry. Cellulose fiber, usually derived from wood, plant walls or cotton is an eco‐friendly thermal insulation material. The cellulose nanofibers (CNFs) described in this work were derived from cotton via sulfuric acid hydrolysis followed by ultrasonication. The formation of CNF and its morphology were analyzed using Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The thermooptic parameters of the prepared sample, which to the author's knowledge has not been reported so far, were studied by the dual beam mode‐matched thermal lens technique. Thermal diffusivity (2.61 × 10−8 m2/s) and thermal conductivity (0.108 W/mK) values of the prepared CNFs clearly point to the application potential of the material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48272.
Variation of the auroral oval size and offset for different magnetic activity levels described by the Kp‐index
Authors: Wagner Daniel , Neuhäuser Ralph 
Published: July 2019

AbstractThe understanding of the behavior of the auroral oval is crucial for the correct reconstruction of its size and location during past centuries by using historical aurora sightings. Therefore, we investigated the radius of the intensity maximum of the oval as well as the offset from the geomagnetic poles for different magnetic activity levels described by the Kp‐index. The Spin‐Scan Auroral Imager mounted on the Dynamics Explorer 1 satellite provides image data from 1981 to 1991, which were used for this purpose. Geometrical analysis of the oval's intensity maximum for each image, transformed into quasi‐dipole coordinates, gives the center of the oval and its radius. The results show a linear dependence between the Kp‐index and radius and a nearly constant shift of the oval center toward the midnight sector of around 4.5°. Furthermore, the images show that the Holzworth mathematical model underestimates the size of the auroral oval in the dawn and dusk sector especially for high magnetic activities.
Nuclear radiation and prevalence of structural birth defects among infants born to women from the Marshall Islands
Authors: Nembhard Wendy N. , McElfish Pearl A. , Ayers Britni , Collins R. Thomas , Shan Xiaoyi , Rabie Nader Z. , Zarate Yuri A. , Maity Suman , Cen Ruiqi , Robbins James A. 
Published: July 2019

AbstractBackgroundWith their unique history of exposure to extensive nuclear testing between 1946 and 1958, descendants of Marshall Island residents may have underappreciated genetic abnormalities, increasing their risk of birth defects.MethodsWe conducted a retrospective cohort study of resident women with at least one singleton live birth between 1997 and 2013 in northwest Arkansas using state birth certificate data linked to data from the Arkansas Reproductive Health Monitoring System, a statewide birth defects registry. We calculated unadjusted and adjusted prevalence ratios (PR) and 95% confidence intervals (CI) from modified Poisson regression analyses for non‐Hispanic (NH) whites, NH‐blacks, Hispanics and Marshallese, using NH‐whites as the reference group.ResultsOf the 91,662 singleton births during the study period, 2,488 were to Marshallese women. Due to the relatively small number of Marshallese births, we could not calculate prevalence estimates for some defects. Marshallese infants had higher rates of congenital cataracts (PR = 9.3; 95% CI: 3.1, 27.9). Although the number of defects was low, Marshallese infants also had higher rates of truncus arteriosus (PR = 44.0; 95% CI: 2.2, 896.1).ConclusionsMarshallese infants may have increased risk of specific birth defects, but estimates are unstable because of small sample size so results are inconclusive. Larger population‐based studies would allow for further investigation of this potential risk among Marshallese infants.
Photoluminescence imaging of europium (III)‐doped γ‐Al2O3 nanofiber structures
Authors: Park So Jeong , Rhee Choong Kyun , Sohn Youngku 
Published: July 2019

AbstractAluminium oxide (Al2O3) has widely been used for catalysts, insulators, and composite materials for diverse applications. Herein, we demonstrated if γ‐Al2O3 was useful as a luminescence support material for europium (Eu) (III) activator ion. The hydrothermal method and post‐thermal treatment at 800°C were employed to synthesize Eu(III)‐doped γ‐Al2O3 nanofibre structures. Luminescence characteristics of Eu(III) ions in Al2O3 matrix were fully understood by taking 2D and 3D‐photoluminescence imaging profiles. Various sharp emissions between 580 to 720 nm were assigned to the 5D0→7FJ (J = 0, 1, 2, 3, 4) transitions of Eu(III) activators. On the basis of X‐ray diffraction crystallography, Auger elemental mapping and the asymmetry ratio, Eu(III) ions were found to be well doped into the γ‐Al2O3 matrix at a low (1 mol%) doping level. A broad emission at 460 nm was substantially increased upon higher (2 mol%) Eu(III) doping due to defect creation. The first 3D photoluminescence imaging profiles highlight detailed understanding of emission characteristics of Eu(III) ions in Al oxide‐based phosphor materials and their potential applications.
Investigation of the interaction between serotonin‐related compounds and phenylboronate moieties in monolithic silica disk‐packed spin columns
Authors: Tsunoda Makoto , Zhuang Huiqi 
Published: July 2019

AbstractSolid‐phase extraction technologies are widely used for sample pretreatment in bioanalysis. Monolithic silica disk‐packed spin columns modified with phenylboronate moieties have been developed for the selective extraction of cis‐diol compounds such as catecholamines. However, in our preliminary studies, serotonin was found to also be extracted in this treatment, along with catecholamines. In this study, the interaction between serotonin‐related compounds (serotonin, tryptophan, 5‐hydroxy‐tryptophan and 5‐hydroxyindoleacetic acid) and phenylboronate moieties was investigated. We found that only serotonin was extracted with phenylboronate‐modified monolithic silica, whereas tryptophan, 5‐hydroxy‐tryptophan and 5‐hydroxyindoleacetic acid were not. Hydrophobic interactions rather than ionic interactions were the primary factor for the adsorption of serotonin to phenylboronate. Finally, the selective pretreatment procedure for catecholamines was improved: thus, the method could be applied for the pretreatment of bio‐samples.
Chemical fingerprint analysis and metabolic profiling of 50% ethanol fraction of Lomatogonium rotatum by ultra‐performance liquid chromatography/quadrupole–time of flight mass spectrometry
Authors: Zhao Lanjun , Ouyang Hui , Wang Qi , Fan Donghui , Wang Yuwei , Yang Shinlin , Li Zhifeng , Pan Lingling , Feng Yulin 
Published: July 2019

AbstractLomatogonium rotatum (L.) Fries ex Nym (L. rotatum), a member of Gentianaceae, is an important mongolian medicine in China used to treat febrile diseases in liver and gallbladder. The aim of present study was to investigate the chemical constituents and metabolites of the 50% ethanol fraction of L. rotatum (50EtLR). Firstly, the extract of L. rotatum was partitioned by macroporous resin to obtain the target fraction (50EtLR), then several compounds were isolated from 50EtLR to obtained the standards for further analysis of chemical constituents of 50EtLR. Secondly, the chemical constituents of 50EtLR were characterized using the ultra‐high performance liquid chromatography coupled with quadrupole–time‐of‐flight mass spectrometry (UHPLC–Q‐TOF–MS/MS). Finally, prototype constituents and related metabolites were analyzed after orally administerng 50EtLR to rats. As a result, a new compound, 6‐O‐[β‐d‐xylopyranosyl‐(1 → 6)‐O‐β‐d‐glucopyranosyl]‐1,4,8‐trimethoxyxanthone (6) along with seven known compounds (1–5, 7 and 8) were isolated from the 50EtLR, 92 components were either unambiguously or tentatively identified. Additionally, 34 prototype constituents and 112 metabolites in rat plasma along with 32 prototype constituents and 53 metabolites in rat liver were tentatively identified. Therefore, xanthones and flavonoids were the main chemical constituents of 50EtLR and sulfation and glucuronidation are the main enzyme‐induced metabolic pathways involved post‐administration.
Magnetic resonance imaging findings and clinical manifestations in cerebral angiostrongyliasis from Dali, China
Authors: Yang Bin , Yang Ling , Chen Yili , Lu Guangming 
Published: July 2019

AbstractPurposeTo analyze magnetic resonance imaging (MRI) findings and clinical diagnosis and treatment data relating to Angiostrongylus cantonensis infection to gain insight into the disease.Materials and MethodsWe retrospectively analyzed the epidemiology, clinical manifestations, diagnosis and treatment data, imaging manifestations, and outcomes of 27 patients who were clinically diagnosed with angiostrongyliasis and who underwent contrast‐enhanced brain MRI.ResultsPatients with A. cantonensis infection had a history of eating raw mollusks in the endemic area, and they mainly presented with dizziness and headache of varying degrees and vomiting (n = 7). Laboratory examinations revealed increased peripheral blood and cerebrospinal fluid (CSF) eosinophils, as well as increased CSF protein levels. Brain MRI findings mainly included eosinophilic meningitis, whereas linear or nodular enhancement of the pia mater was observed in enhanced T1‐weighted and fluid‐attenuated inversion recovery images, accompanied by encephalitis or vasculitis. Meningitis manifested as multiple, thickened flow voids around the meninges, and contrast‐enhanced scans showed substantial enhancement in intracranial dilated and hyperplastic blood vessels.ConclusionThe possibility of A. cantonensis infection should be considered in the effective use of albendazole or mebendazole as a treatment. Combining clinical history with laboratory examination is helpful in diagnosing A. cantonensis infection. A final definite diagnosis can be confirmed by detecting larvae in the CSF. The administration of corticosteroids during pathogen therapy can substantially reduce the therapeutic response.
Can green behaviors really be increased for all employees? Trade‐offs for “deep greens” in a goal‐oriented green human resource management intervention
Authors: Davis Matthew C. , Unsworth Kerrie L. , Russell Sally V. , Galvan Jennifer J. 
Published: July 2019

AbstractThis study explores the complex interaction between psychological and goal‐relevant boundary conditions that influence levels of individual engagement in a green human resource management (HRM) intervention designed to encourage employee green behavior (EGB).Data were collected from 1,112 employees in an automobile manufacturing plant. Consistent with goal‐setting theory, the level of feedback received predicts EGB. However, a three‐way interaction demonstrates how employees with high levels of autonomous motivation do not gain the expected benefits of high feedback and high goal commitment in the enactment of EGB. Instead, only those with weak autonomous motivation are affected by these goal‐related constructs. Findings suggest that both goal‐setting and self‐determination theories are relevant to green HRM interventions. Managers should consider that interventions that are effective for employees who do not have strong autonomous motivation towards the environment may not be effective for those who do.
Stent crush: A novel endovascular approach for treatment of complex in‐stent femoropopliteal chronic total occlusion
Authors: Tabaza Luai , Janzer Sean , George Jon C. 
Published: July 2019

AbstractFemoropopliteal in‐stent chronic total occlusions (CTOs) remain one of the most challenging subsets of peripheral arterial disease to treat percutaneously. Advances in available CTO crossing technology and operator experience have increased percutaneous intervention success rates. We report a case of critical limb ischemia in a patient with chronically occluded femoropopliteal nonoverlapping stents treated with a novel percutaneous approach of subintimal retrograde angioplasty using high compression resistant nitinol stents to crush the occluded previous stents to create a neo‐lumen.
Percutaneous closure of left ventricle pseudoaneurysm using 3D printed heart model for procedure planning: A novel approach
Authors: Mohamed Elsayed , Telila Tesfaye , Osaki Satoru , Jacobson Kurt 
Published: July 2019

AbstractLeft ventricle pseudoaneurysm is a rare complication of myocardial infarction that carries a high risk of mortality. In this report, we present a case of successful percutaneous closure of left ventricle pseudoaneurysm using 3D printing for procedure guidance.
Preferential Microstructure Design of Two‐Dimensional Electrocatalysts for Boosted Oxygen Evolution Reaction
Authors: Xie Junfeng , Zhang Xiaodong , Xie Yi 
Published: July 2019

AbstractElectrocatalytic oxygen evolution reaction (OER) has received substantial concerns owing to its crucial role in improving the overall efficiency of water electrolysis to generate clean hydrogen energy. Focused on the optimization of the earth‐abundant OER catalysts, plenty of strategies have been developed aimed on enriching the exposed active sites and enhancing the overall charge transport behavior, thus improving the OER performance. In this Concept paper, the structural merits and limits of the two‐dimensional (2D) OER catalysts are discussed in detail. Based on the understandings of the structural influences on the OER catalysis, recent progresses on preferential microstructure design of the 2D OER catalysts are summarized, including designing highly porous single‐crystalline catalysts, amorphous/partially amorphous catalysts, defective catalysts and hierarchical catalysts. This work may provide a useful guidance for future designing of the advanced catalysts for OER.
Influence of the Hydrothermal Parameters on the Physicochemical Characteristics of Cu−Ce Oxide Nanostructures
Authors: Kappis Konstantinos , Papavasiliou Joan 
Published: July 2019

AbstractA series of highly active and selective CuCeOx catalysts was prepared via appropriate tuning of the parameters (concentration, temperature) of a citrates‐hydrothermal method. The obtained catalysts were characterized by various physicochemical techniques such as (in‐situ) X‐ray diffraction (XRD), N2 adsorption‐desorption, Raman spectroscopy, X‐ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), while preferential oxidation of CO (CO‐PROX) in H2‐rich stream was used as probe reaction. Suitable modification of the hydrothermal parameters resulted in catalysts with remarkable performance in CO‐PROX reaction, which was strongly dependent on the concentration of oxygen vacancies and reduced copper species.
Electronic Structure of N‐Bridged High‐Valent Diiron‐Oxo
Authors: Phung Quan Manh , Pierloot Kristine 
Published: July 2019

AbstractDensity functional theory (DFT) and an advanced ab initio technique based on density matrix renormalization group (DMRG‐CASPT2) were employed to investigate a reactive N‐bridged high‐valent diiron‐oxo species involved in H‐abstraction reactions. We studied in detail two important doublet states, the ground state with two iron(IV) centers and a mixed valence FeV‐FeIV excited state. We found that the latter state is low‐lying. Furthermore, its electronic structure and spin density imply that it has significantly higher H‐abstraction reactivity than the ground state. This low‐lying excited state might be the reason behind the high oxidation reactivity of this diiron‐oxo species towards methane.
Controlling Metal Ion Counter Diffusion in Confined Spaces for In Situ Growth of Mixed Metal MOF Membranes for Gas Separation
Authors: Sun Yuxiu , Huang Hongliang , Guo Xiangyu , Qiao Zhihua , Zhong Chongli 
Published: July 2019

AbstractThe development of facile, versatile strategies for the fabrication of mixed component metal‐organic framework (MOF) membranes is highly desired, but still very challenging due to the difficulty in controlling crystal growth rates of every single component in a specific confined space. It is difficult to adjust the formation of multicomponent MOF membrane in a controlled manner using conventional approaches such as secondary growth methods. Herein, we present a facile strategy that prepares the mixed metal zeolitic imidazolate framework (ZIF) membranes in situ in a confined space with nanostructure arrays under hydrothermal conditions using the counter diffusion mechanism. The counter diffusion of different metal ions from both the homogeneous bulk solution and the solid metal oxide nanostructure grown on substrate leads to the specific effective reaction zone by encountering with linker molecules at the interface. Subsequently, nucleation and crystal growth generate the continuous mixed metal MOF membranes. With this approach, a variety of mixed metal ZIF membranes were synthesized on different kinds of substrates. The prepared membranes exhibited good sieving effect to H2 and heavier gas molecules during both single and mixed gas permeation tests. This work opens a fresh avenue for the synthesis of mixed component MOF membranes, and the counter diffusion effect can be intentionally adopted to the design and fabrication of selective mixed metal MOF membrane on various supports.