bluuebunny/crossref_metadata_2025_split huggingface dataset:
Algunas especies arbóreas de importancia ecológica en México: una revisión documental
Authors: Pompa-García Marín , Sigala Rodríguez José Á. , Jurado Enrique 
Published: May 2017

Introducción: El reconocimiento de la diversidad florística que México posee a nivel mundial ha propiciado un creciente interés por documentar la importancia ecológica de sus especies.Objetivo: En este trabajo se presenta una compilación de la literatura científica en la cual se estudian especies forestales mexicanas por su valoración de importancia, dominancia y abundancia.Materiales y métodos: Se recopilaron 161 estudios publicados desde 1980 hasta 2015, mediante buscadores especializados como ISI Web of Science, Science Direct, Google Scholar, Latindex, SciELO y a través de palabras clave predefinidas. Se analizan las tendencias y se sugieren perspectivas de investigación para mejorar el estado actual del conocimiento sobre las comunidades vegetales.Resultados y discusión: De acuerdo con el análisis de los estudios, el número de publicaciones incrementó 46 % en los últimos cinco años. Las revistas mexicanas reportan la mayor cantidad de contribuciones (69 %) enfocadas principalmente en la selva baja caducifolia (19 %). Las especies predominantes corresponden a los géneros Quercus (Fagaceae), Pinus (Pinaceae), Acacia (Fabaceae) y Bursera (Burseraceae).Conclusiones: El incremento de las publicaciones durante los últimos años es evidencia del interés creciente en este ámbito; sin embargo, los trabajos realizados para especies o comunidades vegetales con alguna categoría de riesgo tienen baja frecuencia en la literatura.
Detecting climatically driven phylogenetic and morphological divergence among spruce (Picea) species worldwide
Authors: Wang Guo-Hong , Li He , Zhao Hai-Wei , Zhang Wei-Kang 
Published: May 2017

Abstract. This study aimed to elucidate the relationship between climate and the phylogenetic and morphological divergence of spruces (Picea) worldwide. Climatic and georeferenced data were collected from a total of 3388 sites distributed within the global domain of spruce species. A phylogenetic tree and a morphological tree for the global spruces were reconstructed based on DNA sequences and morphological characteristics. Spatial evolutionary and ecological vicariance analysis (SEEVA) was used to detect the ecological divergence among spruces. A divergence index (D) with (0, 1) scaling was calculated for each climatic factor at each node for both trees. The annual mean values, extreme values and annual range of the climatic variables were among the major determinants for spruce divergence. The ecological divergence was significant (P < 0. 001) for 185 of the 279 comparisons at 31 nodes in the phylogenetic tree, as well as for 196 of the 288 comparisons at 32 nodes in the morphological tree. Temperature parameters and precipitation parameters tended to be the main driving factors for the primary divergences of spruce phylogeny and morphology, respectively. Generally, the maximum D of the climatic variables was smaller in the basal nodes than in the remaining nodes. Notably, the primary divergence of morphology and phylogeny among the investigated spruces tended to be driven by different selective pressures. Given the climate scenario of severe and widespread drought over land areas in the next 30–90 years, our findings shed light on the prediction of spruce distribution under future climate change.
Speaking about Marriage: Notes from the 1744 Married Choir Conferences
Authors: Petterson Christina , Faull Katherine M. 
Published: May 2017

ABSTRACT
The document presented in this essay is a transcription and translation of the minutes of a series of “speakings” held with married couples in Herrnhut and Berthelsdorf during the year 1744. The original was found in the Unity Archives in Herrnhut, Germany, where it survived despite repeated attempts by eighteenth-century archivists to destroy anything considered too confidential. The text offers a rare insight into the intimate realm of married couples and into the reception of Zinzendorf's ideas on marriage among common church members.
Strain‐dependent partial slip on rock fractures under seismic‐frequency torsion
Authors: Saltiel Seth , Bonner Brian P. , Ajo‐Franklin Jonathan B. 
Published: May 2017

AbstractMeasurements of nonlinear modulus and attenuation of fractures provide the opportunity to probe their mechanical state. We have adapted a low‐frequency torsional apparatus to explore the seismic signature of fractures under low normal stress, simulating low effective stress environments such as shallow or high pore pressure reservoirs. We report strain‐dependent modulus and attenuation for fractured samples of Duperow dolomite (a carbon sequestration target reservoir in Montana), Blue Canyon Dome rhyolite (a geothermal analog reservoir in New Mexico), and Montello granite (a deep basement disposal analog from Wisconsin). We use a simple single effective asperity partial slip model to fit our measured stress‐strain curves and solve for the friction coefficient, contact radius, and full slip condition. These observations have the potential to develop into new field techniques for measuring differences in frictional properties during reservoir engineering manipulations and estimate the stress conditions where reservoir fractures and faults begin to fully slip.
Influence of the iron spin crossover in ferropericlase on the lower mantle geotherm
Authors: Valencia‐Cardona Juan J. , Shukla Gaurav , Wu Zhongqing , Houser Christine , Yuen David A. , Wentzcovitch Renata M. 
Published: May 2017

AbstractThe iron spin crossover in ferropericlase introduces anomalies in its thermodynamics and thermoelastic properties. Here we investigate how these anomalies can affect the lower mantle geotherm using thermodynamics properties from ab initio calculations. The anomalous effect is examined in mantle aggregates consisting of mixtures of bridgmanite, ferropericlase, and CaSiO3 perovskite, with different Mg/Si ratios varying from harzburgitic to perovskitic (Mg/Si ∼ 1.5 to 0.8). We find that the anomalies introduced by the spin crossover increase the isentropic gradient and thus the geotherm proportionally to the amount of ferropericlase. The geotherms can be as much as ∼200 K hotter than the conventional adiabatic geotherm at deep lower mantle conditions. Aggregate elastic moduli and seismic velocities are also sensitive to the spin crossover and the geotherm, which impacts analyses of lower mantle velocities and composition.
Metal‐Free Ionic‐Liquid‐Mediated Synthesis of Benzimidazoles and Quinazolin‐4(3H)‐ones from Benzylamines
Authors: Sharma Rohit , Abdullaha Mohd. , Bharate Sandip B. 
Published: May 2017

AbstractAn expedient metal‐free synthetic protocol for the construction of benzimidazoles has been developed from o‐phenylenediamine and benzylamine, using an imidazolium‐based ionic liquid as the reaction medium. The reactions proceed by oxidation of benzylamine derivatives to their corresponding imines, followed by intramolecular cyclization, to yield benzimidazoles. Advantages of this method include: an environmentally friendly metal‐free process, recyclable reaction media, high yields, short reaction times, and the applicability for the synthesis of quinazolin‐4(3H)‐ones. An NMR spectroscopy study provided further insight into the reaction.
Synthesis of 18‐Demethoxy Analogues of the Aglycon of Saundersiosides A and B, Based on a Cascade Process
Authors: Jiang Xiao‐Ling , Shi Yong , Tian Wei‐Sheng 
Published: May 2017

AbstractA deprotection/retro‐vinylogous aldol/vinylogous aldol/intramolecular transesterification/O‐Michael cascade triggered by Bu4NF was found to lead to a hexacyclic lactone in high yield on gram scale. This intermediate was used to prepare several 18‐demethoxy analogues of the aglycon of saundersiosides A and B.
Utilizing Paper‐Based Devices for Antimicrobial‐Resistant Bacteria Detection
Authors: Boehle Katherine E. , Gilliand Jake , Wheeldon Christopher R. , Holder Amethyst , Adkins Jaclyn A. , Geiss Brian J. , Ryan Elizabeth P. , Henry Charles S. 
Published: May 2017

AbstractAntimicrobial resistance (AMR), the ability of a bacterial species to resist the action of an antimicrobial drug, has been on the rise due to the widespread use of antimicrobial agents. Per the World Health Organization, AMR has an estimated annual cost of USD 34 billion in the US and is predicted to be the number one cause of death worldwide by 2050. One way AMR bacteria can spread, and by which individuals can contract AMR infections, is through contaminated water. Monitoring AMR bacteria in the environment currently requires that samples be transported to a central laboratory for slow and labor intensive tests. We have developed an inexpensive assay using paper‐based analytical devices (PADs) that can test for the presence of β‐lactamase‐mediated resistance. To demonstrate viability, the PAD was used to detect β‐lactam resistance in wastewater and sewage and identified resistance in individual bacterial species isolated from environmental water sources.
Additive‐Free, Robust H2 Production from H2O and DMF by Dehydrogenation Catalyzed by Cu/Cu2O Formed In Situ
Authors: Zhang Sai , Ma Yuanyuan , Zhang Huan , Zhou Xuemei , Chen Xiao , Qu Yongquan 
Published: May 2017

AbstractHydrogen production from organic/inorganic hydrides is a promising strategy for the development of novel clean energy resources to replace fossil fuels and satisfy ever‐increasing energy demands. Most current processes involve small flammable chemicals and are catalyzed by noble metals in basic media with the release of the greenhouse gas CO2. Herein, we describe an alternative pathway for highly efficient and robust H2 production through a dehydrogenation reaction between water and N,N‐dimethylformamide catalyzed by Cu/Cu2O catalysts formed in situ. The catalysts exhibit high and robust activity for H2 production. Importantly, the formation of H2 as the sole gas and the valuable by‐product N,N‐dimethylaminoformic acid make this process clean and valuable with 100 % atom economy.
Preparation at the water–oil interface of Janus composite nanoparticles and their photoelectric properties
Authors: Qiao Yisha , Du Yixuan , Zhang Xiaowei , Li Yunbo 
Published: May 2017

ABSTRACTA series of Janus composite poly(3‐hexyl thiophene)‐b‐poly(3‐thiophenehexanethiol)–gold nanoparticles were synthesized by self‐assembly at the water–oil interface, and their photoelectric performance was investigated. The results show that the precise Janus composite nanostructure could be controlled by the adjustment of the reaction temperature and stirring time. The UV–visible measurement revealed that the absorption maximum had an appreciable redshift, and the photoluminescence (PL) spectra indicated that the PL intensity of poly(3‐hexyl thiophene)‐b‐poly[3‐(6‐thiolhexyl thiophene)] decreased upon the addition of gold nanoparticles. In addition, compared to a common composite of poly(3‐hexyl thiophene), the conductivity properties of the Janus composite nanostructure increased remarkably. Therefore, the Janus composite nanoparticles have the potential for applications in photovoltaic devices. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45107.
Coopetition as a Potential Strategy for Corporate Sustainability
Authors: Christ Katherine L. , Burritt Roger L. , Varsei Mohsen 
Published: May 2017

AbstractThe paper is among the first to consider coopetition strategy in the context of corporate level sustainability. Through examination of literature and an example of an actual coopetitive agreement in wine industry logistics, consideration is given to the potential benefits of and problems with sustainability‐based coopetition strategies. The research, based on publicly available information, leads to suggestions for future study into specific theoretical, methodological and pragmatic aspects of sustainability‐related coopetition strategies. At a theoretical level, research into the dynamics of coopetition strategies and relationships between win–win and trade‐offs within economic, environmental and social performance settings is suggested. As the field of study continues to emerge, a broader set of exploratory case studies involving collaborative engagement and participation of practitioners is needed. Attention is also drawn to a broad range of settings available for further research into the design and implementation of sustainability‐related coopetitive strategies exploring advantages for corporations and society. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment
Directing virtual crowds based on dynamic adjustment of navigation fields
Authors: Tsai Tsung‐Yu , Wong Sai‐Keung , Chou Yi‐Hung , Lin Guan‐Wen 
Published: May 2017

AbstractNavigation fields are a popular data structure for directing the movement of virtual crowds. However, the congestion problem may occur at the corners of objects in using a navigation field because the agents move quite closely to each other. The agents may congest at the corners even though there is room for the agents to move away from the congested regions. In this paper, we propose to place crowd monitors at the corners to collect the data such as the movement direction of crowds and crowd densities. Then the navigation field is adjusted dynamically so that the crowds are led to move away from the congested regions. We also propose a simple data structure for speeding up the collision detection process between agents and objects. Experimental results show that our approach successfully alleviates the congestion problem at the corners.
Supported Vanadium Oxide Clusters in Partial Oxidation Processes: Catalytic Consequences of Size and Electronic Structure
Authors: Yun Dongmin , Song Yang , Herrera José E. 
Published: May 2017

AbstractThe catalytic activity for ethanol partial oxidation of vanadium oxide (VOx) anchored on titanium oxide was correlated to their electronic structure. In situ Raman spectroscopy and temperature‐programmed desorption (TPD) experiments indicate that the presence of catalytically active VOx moieties is very sensitive to vanadia loading: highly dispersed VOx predominantly exists at low VOx contents whereas larger vanadia clusters coexist at higher VOx loadings. In situ UV/Vis spectroscopy revealed that a significant fraction of these larger clusters remain reduced during catalysis, and thus do not fully participate in catalytic turnovers. The electronic structures of model VOx nanoclusters of different sizes (monomer, dimer, trimer, and one‐dimensional polymers) were investigated by using periodic density functional theoretical calculations. Results indicate that their electronic structures are significantly affected by their size. Our analysis also revealed that the formation of reduced VOx species (V4+) during catalysis is concomitant to the reduction of adjacent Ti cations (Ti3+). Theoretically calculated optical absorption spectra matched the experimental spectroscopic results obtained under in situ reaction conditions. Furthermore, the determination of defect formation enthalpies reported previously as the main descriptor for catalytic activity of vanadia nanoclusters, predicted that isolated monomeric VOx clusters predominantly take part in catalytic turnovers.
Cuprous Ion Mass Transport Limitations During Copper Electrodeposition
Authors: Schmidt Ralf , Gaida Josef 
Published: May 2017

AbstractPolarization experiments in sulfuric acid based copper plating electrolytes disclosed unique mass‐transport limitations at very small cathodic overpotentials. Determination of the bulk concentration of the species, which is correlated to the observed limiting current plateaus, by means of Levich plots indicated that these plateaus may be related to mass‐transport‐limited copper deposition from cuprous ions. This hypothesis was further supported by comparison of the equilibrium constant of the comproportionation of cupric ions and metallic copper to cuprous ions obtained from experiments with literature values. The results provide a simple technique to detect cuprous ions and support the view that cuprous ions are deposited at a diffusion‐limited rate, whereas cupric ions deposition is controlled by electrochemical kinetics. The method may be of relevance for superfilling, since the action of additives in industrial plating electrolytes involves interaction with cuprous ions.
Facile Preparation of Water‐Soluble and Cytocompatible Small‐Sized Chitosan‐Polydopamine Nanoparticles
Authors: Ni Yunzhou , Chen Feng , Shi Leilei , Tong Gangsheng , Wang Jie , Li Huimei , Yu Chunyang , Zhou Yongfeng 
Published: May 2017

AbstractIn this paper, a kind of novel water‐soluble chitosan‐polydopamine (CHT‐PDA) nanoparticles with a hydrodynamic diameter (Dh) around 10 nm were reported by the combination of self‐polymerization of PDA and electrostatic complexation between PDA and CHT in water/DMSO (W/D) mixture at the molar fraction of DMSO (xDMSO = 0.37). The preparation method was efficient with a yield of 98% around. The as‐prepared water‐soluble CHT‐PDA nanoparticles exhibited effective UV‐screen ability, enhanced visible‐light transmittance and good cytocompatibility via MTT assay, which might be used in transparent formulation for UV protection usage, especially in biological field including sun care application.
Diameter‐Sensitive Breakdown of Single‐Walled Carbon Nanotubes upon KOH Activation
Authors: Ye Jianglin , Wu Shuilin , Ni Kun , Tan Ziqi , Xu Jin , Tao Zhuchen , Zhu Yanwu 
Published: May 2017

AbstractWhile potassium hydroxide (KOH) activation has been used to create pores in carbon nanotubes (CNTs) for improved energy‐storage performance, the KOH activation mechanism of CNTs has been rarely investigated. In this work, the reaction between single‐walled CNTs (SWCNTs) and KOH is studied in situ by thermogravimetric analysis coupled to infrared (IR) spectroscopy and gas chromatography/mass spectrometry (MS). The IR and MS results clearly demonstrate the sequential evolution of CO, hydrocarbons, CO2, and H2O in the activation process. By using the radial breathing mode of Raman spectroscopy, a diameter‐sensitive selectivity is observed in the reaction between SWCNTs and KOH, leading to a preferential distribution of SWCNTs with diameters larger than 1 nm after activation at 900 °C and a preferential removal of SWCNTs with diameters below 1 nm upon activation.
Corporate stakeholder responsiveness? Exploring the state and quality of GRI‐based stakeholder engagement disclosures of European firms
Authors: Moratis Lars , Brandt Satu 
Published: May 2017

AbstractStakeholder engagement (SE) is recognized as a key process to align firm and stakeholder interests and to identify material content for sustainability reporting (SR). Research on SE quality in an SR context has, however, been largely neglected. This paper investigates the current state and quality of SE within SR within a sample of 55 sustainability reports issued by European firms that used the new Global Reporting Initiative's G4 Guidelines. It will focus on why, how, and with whom firms are involved in SE based on an SE disclosures analysis framework and investigate the extent to which reporting maturity influences the state of SE disclosures and SE quality. While SE seems common practice, many firms are failing to provide full disclosure on how stakeholders have been engaged in defining report content. Less than half of the studied reports contained clear disclosures on how firms had responded to stakeholder concerns. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment
Using Formal Concept Analysis to Examine Water Disclosure in Corporate Social Responsibility Reports
Authors: Kleinman Gary , Kuei Chu‐hua , Lee Picheng 
Published: May 2017

AbstractCorporate social responsibility (CSR) water disclosures vary in content, leading to concern about the quality and extent of such disclosures. This paper employs formal concept analysis (FCA) to examine water reporting of selected companies in the US food and beverage industry that have followed the water guidelines set forth by the Global Reporting Initiative (GRI) and in the disclosure guidelines of the CEO Water Mandate. Assessments of water consumption and water withdrawal were cited more often in our sample firms' CSR reports. FCA results also identify the major focus of our sample firms as setting sustainable water management goals and water quality strategy. Other important issues included leadership, partnership, and employee involvement. While the FCA text mining tool is demonstrated using water‐related behaviors here, it can be used to identify continuous improvement opportunities and examine many other issues of interest to corporate stakeholders in other industries and communities worldwide. Copyright © 2017 John Wiley & Sons, Ltd and ERP Environment
Modeling and analysis of simultaneous information and energy transfer in Internet of Things
Authors: Liu Chang , Natarajan Balasubramaniam 
Published: May 2017

AbstractThe Internet of Things (IoT) will allow unprecedented connectivity among devices and is predicted to make our worldsmarter. However, due to battery constraints, energy efficiency of IoT with numerous smart devices is a key challenge. Simultaneous information and energy transfer (SIET) is a promising method to provide green energy for energy‐constrained wireless networks. This paper, for the first time, investigates the modeling and analysis of SIET in a network where IoT nodes are powered via IoT gateways. Specifically, a Ginibre point process that captures the repulsion between spatially distributed nodes is used to model the IoT gateway network. The goal of our work is to uncover a strategy to balance the trade‐off between power outage probability and transmission outage probability by a careful design of the power split ratio of SIET. To achieve that, we derive closed‐form expressions for these 2 probabilities in IoT for a practical case. The simulation results verify our theoretical results and illustrate the effects of different network parameters (eg, transmit power and density of gateways and signal‐to‐interference‐plus‐noise ratio threshold) on SIET.
Reporting Degradation from Different Fuel Contaminants in Ni‐anode SOFCs
Authors: Lanzini A. , Ferrero D. , Papurello D. , Santarelli M. 
Published: May 2017

AbstractThe real‐life operation of solid oxide fuel cell (SOFC) system has to deal with fuel contaminants which might reduce even significantly the lifetime of reformer and stack depending on the type and amount of contaminant present in the feed stream. From a system perspective, detecting and correlating observed stack and reformer performance degradation with fuel contamination is fundamental to implement correctional procedures (e.g., change of clean‐up vessels catalysts) and/or trigger alarms to prevent a further contamination of the fuel cell. In this work, based on own experiments with several fuel contaminants (H2S, HCl, tars, siloxanes), we have developed empirical degradation models which are able to quantitatively correlate the range of degradation rate resulting from known amounts of a certain contaminant type in the fuel stream. Degradation induced by carbon deposition is also assessed using a simulation model. The techno‐economic trade‐off of having ultra‐stringent purification requirements on the fuel clean‐up unit due to additional operating costs (e.g., for frequent catalysts change) or capital costs (e.g., for vessel over‐sizing to accommodate a larger amount of catalysts and possibly of different types) versus the lifetime of the fuel cell stacks is eventually analyzed.