bluuebunny/crossref_metadata_2025_split huggingface dataset:
Qué sabemos de los Aguarás: Experiencias de un taller educativo sobre Cánidos Silvestres (Mburucuyá, Corrientes)
Authors: Romero Verónica L. , Natalini M. Belén , Fernández Patricia M. , Romero Bárbara G. , Kowalewski Martin M. 
Published: August 2018

<p>Esta actividad de extensión es resultado de proyectos de investigación que forman parte de la Estación Biológica de Corrientes (EBCo, MACN-CONICET) para difundir información sobre la biología, ecología y comportamiento de tres especies de cánidos silvestres que coexisten en la provincia de Corrientes: el aguará guazú (Chrysocyon brachyurus), y dos especies más pequeñas, conocidas como aguará chaí Cerdocyon thous y Lycalopex gymnocercus. El objetivo principal fue establecer un vínculo que sensibilice a los participantes sobre cuestiones referentes a la conservación de estas especies y su entorno, a partir del papel que cumplen las mismas en su ambiente permitiendo que los participantes puedan respetar, cuidar y valorar sus recursos naturales. El presente trabajo da a conocer una de las primeras experiencias del taller denominado “¿Qué sabemos de los aguarás?... Valorando nuestras especies nativas” realizado en el Colegio N° 613 “Ada Ramona Turconi, extensión áulica de la misma escuela ubicada en la localidad de Mburucuyá (Corrientes), el día 22 de junio 2016, con siete actividades diferentes. Tanto para los participantes como los integrantes del equipo de trabajo el intercambio ha sido positivo, pues mediante el juego, propuesto como herramienta de transferencia de conocimientos científicos, se obtuvo una participación enriquecedora para los responsables del taller, y llena de interés y buena predisposición por parte de la comunidad educativa de dicha institución escolar.</p><p> </p>
Espacio virtual inalámbrico de altas prestaciones para la educación en Ingeniería
Authors: Valdez Alberto D. , Miranda Carlos A. , Schlesinger Paola L. , Chiozza Juan A. , Miranda Carlos V. 
Published: August 2018

<pre class="aLF-aPX-K0-aPE">Los espacios virtuales inalámbricos en los campus universitarios se desarrollaron rápidamente en los últimos tiempos. La implementación de un espacio virtual académico de conectividad portable/ móvil en base a una red integrada inalámbricapara la enseñanza de la ingeniería redunda en muchos beneficios. Esta red se puede proyectar con una política de funcionamiento y servicio que admita a sus usuarios desplazarse dentro del mismo, con intuitivas herramientas académicas y de gestión vinculados al ámbito universitario. En este trabajo se describe una propuesta basada en los estándares WiMAX/WiFi.
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Mini bobina de Tesla para el proceso de enseñanza - aprendizaje y/o la demostración en el aula
Authors: Cabanillas Mendoza Cintia , Torres Ercolani Saúl E. , Provasi Patricio F. 
Published: August 2018

<pre class="aLF-aPX-K0-aPE">Con este trabajo se busca favorecer al proceso enseñanza-aprendizaje del electromagnetismo o bien la demostración de algunos fenómenos físicos tales como el principio de conservación de la energía entre otros. El primero de los objetivos se puede alcanzar por medio del seguimiento detallado del diseño, construcción y funcionamiento de la bobina de Tesla. La investigación, el desarrollo y la construcción son piezas claves para el proceso aprendizaje de los estudiantes, permitiendoles la capacidad de lograr que la teoría pueda ser aplicada de una u otra forma en un sentido práctico, ya sea orientado a la tecnología o bien a la ciencia básica que tienen como finalidad el conocimiento, el cual también puede incluir la educación. El segundo de los objetivos, por ser puramente demostrativo, parece más sencillo de lograr pero requiere un agudo sentido del oportunismo acompañado de las explicaciones y ejemplificaciones apropiadas. Lo que implica un conocimiento cabal de los fenómenos físicos que ocurren en esta mini-bobina de Tesla por parte del docente.</pre><div> </div>
Os jesuitas en Portugal e a ciencia: continuidades e rupturas (séculos XVI-XVIII)
Authors: Fiolhais Carlos , Franco José Eduardo 
Published: August 2018

Apresenta-se, em resumo, a ação dos Jesuítas em Portugal no domínio da ciência, desde a sua entrada em Portugal, no ano de 1540, até à sua expulsão pelo Marquês de Pombal, em 1759. Foi extraordinária a rápida expansão da sua rede de colégios no país e em todo o mundo, incluindo o Brasil, a Índia, a China e o Japão. O Colégio das Artes em Coimbra produziu, entre 1592 e 1606, um conjunto de comentários a Aristóteles que se espalhou nos colégios jesuítas. Por outro lado, no Colégio de S. Antão em Lisboa, funcionou, de 1590 a 1759, uma escola de matemática, intitulada a Aula da Esfera, servida por alguns professores estrangeiros, por exemplo, o italiano Christophoro Borri. Foram esses mestres que trouxeram, não só para Portugal, como também para vários lugares, mesmo os mais remotos do império, as técnicas de observação astronómica introduzidas por Galileu, alargando à escala global a Revolução Científica. O Observatório Astronómico e o Tribunal da Matemática na corte imperial chinesa foram o expoente dessa ação. A meio do século XVIII, pressionados pelo antijesuitismo apoiado pela coroa, a sua ação foi fortemente contrariada. Apesar das acusações de desatualização científica, o certo é que alguns Jesuítas, como o padre Inácio Monteiro, não podem deixar de ser considerados modernos. A extinção da Ordem deixou um vazio no sistema de ensino português, o qual a Reforma Pombalina da Universidade de Coimbra só em parte preencheu.
Dielectric studies of CCTO-based nanocomposite ceramic synthesized by a solid state route
Authors: Khare Ankur , Kumar Atendra , Jaiswar Shashikala , Mukhopadhyay Nilay K. , Mandal Kamdeo 
Published: August 2018

Abstract
In the present work, the nanocomposite 0.9CaCu3Ti4O12–0.1BaTiO3 (CC-BT) is synthesized by a solid-state reaction method by sintering at 950°C for 12 h. X-ray diffraction analysis confirms the presence of both BaTiO3 and CaCu3–Ti4O12 phases in the composite ceramic. Transmission electron microscopy analysis of the composite demonstrates the formation of nanoparticles with an average particle size of 40 ± 5 nm. The surface morphology of the composite sintered at 950°C for 12 h obtained by scanning electron microscopy analysis indicates the evolution of large and small grains with a bimodol distribution. The average and root mean square roughness were found to be 1.41 nm and 2.24 nm respectively by atomic force microscopy studies. The dielectric constant of CC-BT ceramic was determined to be 6231 at 100 Hz and 500 K. The presence of the semiconducting grains and the insulating grain boundaries in the composite supports the internal barrier layer capacitance mechanism operative in CC-BT nanocomposite.
On Intrinsic Quadrics
Authors: Fahrner Anne , Hausen Jürgen 
Published: August 2018

AbstractAn intrinsic quadric is a normal projective variety with a Cox ring defined by a single quadratic relation. We provide explicit descriptions of these varieties in the smooth case for small Picard numbers. As applications, we figure out in this setting the Fano examples and (affirmatively) test Fujita’s freeness conjecture.
Marine microorganisms as amber inclusions: insights from coastal forests of New Caledonia
Authors: Schmidt Alexander R. , Grabow Dennis , Beimforde Christina , Perrichot Vincent , Rikkinen Jouko , Saint Martin Simona , Thiel Volker , Seyfullah Leyla J. 
Published: August 2018

Abstract. Marine microorganisms trapped in amber are
extremely rare in the fossil record, and the few existing inclusions
recovered so far originate from very few pieces of Cretaceous amber from
France. Marine macroscopic inclusions are also very rare and were recently
described from Cretaceous Burmese amber and Early Miocene Mexican amber.
Whereas a coastal setting for the amber source forests is generally proposed,
different scenarios have been suggested to explain how these marine
inclusions can become trapped in a resin of terrestrial origin. These
scenarios include an introduction of marine organisms (i) through high tides,
(ii) from storms and resulting in flooding of the littoral/estuarine forest
floor, (iii) in resin dropped into the sea in mangrove-type settings, or
(iv) by wind and sea spray. We investigated the possibility of a wind-driven
introduction of marine microorganisms into tree resins using modern coastal
conifer forests with the highly resinous Cook pine (Araucaria columnaris) in New Caledonia as a model for the Cretaceous amber forests
from France. By exposing fresh resin surfaces on the seaward side of the
trees and the collection of older in situ resins, we confirmed that marine
microorganisms can become trapped on sea-exposed resin, along with remnants
from terrestrial organisms, and salt crystals. We suggest that, for cases
where only a few marine inclusions are discovered in an amber deposit, an
origin from aeolian background deposition is feasible. However, a more
energetic but possibly still aeolian event is likely needed to explain the
high numbers of marine microorganisms embedded in pieces of Cretaceous amber
from France.
Combining temporal 3-D remote sensing data with spatial rockfall simulations for improved understanding of hazardous slopes within rail corridors
Authors: van Veen Megan , Hutchinson D. Jean , Bonneau David A. , Sala Zac , Ondercin Matthew , Lato Matt 
Published: August 2018

Abstract. Remote sensing techniques can be used to gain a more detailed understanding
of hazardous rock slopes along railway corridors that would otherwise be
inaccessible. Multiple datasets can be used to identify changes over time,
creating an inventory of events to produce magnitude–frequency relationships
for rockfalls sourced on the slope. This study presents a method for using
the remotely sensed data to develop inputs to rockfall simulations, including
rockfall source locations and slope material parameters, which can be used to
determine the likelihood of a rockfall impacting the railway tracks given its
source zone location and volume. The results of the simulations can be
related to the rockfall inventory to develop modified magnitude–frequency
curves presenting a more realistic estimate of the hazard. These methods were
developed using the RockyFor3D software and lidar and photogrammetry data
collected over several years at White Canyon, British Columbia, Canada,
where the Canadian National (CN) Rail main line runs along the base of the slope. Rockfalls
sourced closer to the tracks were more likely to be deposited on the track or
in the ditch, and of these, rockfalls between 0.1 and 10 m3 were
the most likely to be deposited. Smaller blocks did not travel far enough to
reach the bottom of the slope and larger blocks were deposited past the
tracks. Applying the results of the simulations to a database of over 2000
rockfall events, a modified magnitude–frequency can be created, allowing the
frequency of rockfalls deposited on the railway tracks or in ditches to be
determined. Suggestions are made for future development of the methods
including refinement of input parameters and extension to other modelling
packages.
Conforto térmico de vacas leiteiras mestiças durante a inseminação e a relação com a taxa de concepção
Authors: Hooper Henrique Barbosa , Salomão Daniela De Oliveira Santana , Ayres Gustavo Ferreira , Titto Cristiane Gonçalves , Santos Ricarda Maria dos , Nascimento Mara Regina Bueno de Mattos 
Published: August 2018

Avaliou-se o conforto térmico de vacas leiteiras mestiças, anteriormente à inseminação artificial, e a relação com a taxa de concepção. Este estudo foi realizado em Uberlândia, Minas Gerais, região caracterizada por invernos secos e verões chuvosos, utilizando 112 vacas leiteiras mestiças, cuja composição genética envolvia as raças Holandesa, Gir, Jersey e Pardo Suíça. Os parâmetros fisiológicos, frequência respiratória e temperatura retal foram mensurados previamente à inseminação artificial, juntamente com os parâmetros ambientais, temperatura, umidade do ar e velocidade do vento. A temperaturamínima e a umidade relativa foram maiores no verão do que no inverno. Já a amplitude térmica foi menor no verão em relação ao inverno (p ˂ 0,05). As temperaturas média e máxima do ar, ITU (índice de temperatura e umidade) e ITE (índice de temperatura equivalente) não diferiram entre as estações (p ˃ 0,05). Observou-se uma tendênciade maior taxa de concepção quando as inseminações foram realizadas no ITU ≤ 72 (p = 0,06). Conclui-se que o momento em que foram realizadas as inseminações artificiais contribuiu para que os animais estivessem em conforto térmico e, portanto, não foi observado prejuízo na taxa de concepção das vacas leiteiras mestiças.
Tolerance and accumulation of lithium in Apocynum pictum Schrenk
Authors: Jiang Li , Wang Lei , Zhang Lei , Tian Changyan 
Published: August 2018

Primarily, lithium (Li) resource development and wider application of Li-ion batteries result in Li pollution and concomitantly poses increasing and inevitable problems to environmental health and safety. However, information is rare about the scope of the remediation of Li contaminated soil. Apocynum venetum is already proved to be a Li-accumulator with high Li tolerance and accumulation (Jiang et al., 2014). However, it is not clear whether Apocynum pictum, another species of the same genus with the same uses as A. venetum, is also a Li-accumulator. We investigated germination, growth and physiological responses of A. pictum to different levels of LiCl. Germination was not significantly affected by low Li concentration (0–100 mmol L−1). As LiCl increased from 100 to 400 mmol L−1, both germination percentage and index decreased gradually. For germination of A. pictum seeds, the critical value (when germination percentage is 50%) in LiCl solution was 235 mmol L−1, and the limit value (when germination percentage is 0%) was 406 mmol L−1. A. pictum could accumulate >1,800 mg kg−1 Li in leaves, and still survived under 400 mg kg-1 Li supply. The high Li tolerance of A. pictum during germination and growth stage was also reflected by activity of α-amylase and contents of soluble sugar, proline and photosynthetic pigments under different Li treatments. The bioconcentration factors (BCF) (except control) and translocation factors (TF) were higher than 1.0. High tolerance and accumulation of Li indicated that A. pictum is Li-accumulator. Therefore, this species could be useful for revegetation and phytoremediation of Li contaminated soil.
PDT‐Driven Highly Efficient Intracellular Delivery and Controlled Release of CO in Combination with Sufficient Singlet Oxygen Production for Synergistic Anticancer Therapy
Authors: Wu Lihuang , Cai Xiaojun , Zhu Haofang , Li Junhua , Shi Dongxu , Su Dunfan , Yue Dong , Gu Zhongwei 
Published: August 2018

AbstractThe precise delivery and controllable release of carbon monoxide (CO) to tumor tissues is an emerging anticancer therapy because CO in a high dose can be detrimental to cell survival and tumor growth. However, CO gas therapy is limited by the gaseous nature of CO that hinders its enrichment and controllable release to tumor tissues. Here, a novel photodynamic therapy (PDT)‐driven CO controllable release system (CORM@G3DSP‐Ce6) that integrates the photosensitizer chlorin e6 (Ce6) and H2O2‐sensitive CO releasing molecule CORM‐401 into peptide dendrimer‐based nanogels (G3DSP) is described. Upon excitation with near‐infrared light, Ce6‐mediated photochemical effect not only promotes the efficient cellular internalization of CORM@G3DSP‐Ce6, but also triggers the rapid intracellular CO release from CORM‐401 by depleting the H2O2 produced during PDT. Importantly, the PDT‐driven CO release does not impair the generation capability of singlet oxygen (1O2). As a result, accompanied with the simultaneous generation of large amounts of 1O2 and CO in cells, the combination of PDT and CO gas therapy offers significant synergistic anticancer effects and superior therapeutic safety both in vitro and in vivo.
Photochemical Synthesis of Radiate Titanium Oxide Microrods Arrays Supporting Platinum Nanoparticles for Photoassisted Electrooxidation of Methanol
Authors: Zheng Lijun , Zheng Shizheng , Zhu Zhengyou , Xu Qiaoling , Zhang Gaixia , Sun Shuhui , Yang Dachi 
Published: August 2018

AbstractPhotoassisted catalysis is recently adopted to accelerate the kinetics of the methanol oxidation, which allows the photocatalysis and electrocatalysis simultaneously occur on the catalyst surface and even on interior region. The rational design of highly efficient photoassisted electrocatalysts is highly desirable, however, it is very challenging. In this study, architectures of radiate TiO2 microrods arrays support Pt nanoparticles (Pt NPs/TiO2 MRs) are developed, via the combination of first hydrothermal and subsequent photodeposition process. Benefited from the synergetic effect of photocatalytic acceleration and the radiate architectures, the mass activity of Pt NPs/TiO2 MRs for methanol electrooxidation, under UV irradiation (wavelength: 365 nm), is 2.77 and 6.1 times as high as those of Pt NPs/TiO2 MRs without irradiation and commercial Pt/C, respectively. Moreover, under UV irradiation, both the CO tolerance and durability of the Pt NPs/TiO2 MRs catalysts are significantly improved. Notably, in both acidic and alkaline media, the Pt NPs/TiO2 MRs catalysts show improved electrocatalytic performance for photoassisted electrooxidation of methanol. This study provides a building art toward 3D architectures of radiate semiconductor MRs arrays supporting metallic NPs, and offers an effective way to improve the electrochemical activity of methanol oxidation utilizing the synergistic combination of photocatalysis and electrocatalysis.
A study on carbon fiber reinforced poly(lactic acid)/polycarbonate composites
Authors: Hazer Seda , Coban Meral , Aytac Ayse 
Published: August 2018

ABSTRACTIn this study, the properties of carbon fiber (CF) reinforced poly(lactic acid)/polycarbonate (PLA/PC) composites was investigated. Two compositions of PLA/PC (90/10 and 50/50) blends were used as matrix. Characterization of composites was carried out by differential scanning calorimetry, thermal gravimetric analysis, tensile test, dynamic mechanical analysis, limiting oxygen index (LOI), scanning electron microscope, and heat release rate (HRR). The tensile strength values of 90PLA/10PC and 50PLA/50PC blends were improved by the addition of CF. The highest tensile strength value was observed at 50PLA50PC30CF composite as 114.6 MPa. Storage modulus values of CF reinforced PLA/PC composites enhanced with increasing CF loading. The highest LOI value was obtained for 50PLA50PC30CF composite. It was observed that there is a significant decrease in peak of HRR (pHRR) and total heat release value for all of the composites with increasing CF loading. It was concluded that CF reinforced 50PLA/50PC composite has better mechanical and thermal properties than 90PLA/10PC composite. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46881.
Development of novel soy‐protein‐based superabsorbent matrixes through the addition of salts
Authors: Fernández‐Espada Lucía , Bengoechea Carlos , Sandía José Alberto , Cordobés Felipe , Guerrero Antonio 
Published: August 2018

ABSTRACTThe addition of salts, like sodium bicarbonate (SB) or carbonate (SC), into the formulation of bioplastic materials may alter their hydrophilic character to a significant extent. Soy protein isolate (SPI) is a byproduct of the soybean oil industry, which, when properly blended with glycerol (GL), can be further processed through a lab‐scale injection molding device. A maximum in the water uptake around 2250 or 2500% is obtained for bioplastics obtained when either SB or SC content is around 1 wt %, respectively. Thus, they exceed the limit to be considered superabsorbent materials (SAMs). Regarding their mechanical properties, a higher presence of SB within the SPI/GL matrix provides materials with a higher extensibility and lower Young's modulus. A higher water uptake is observed after replacing SB for SC in the formulation, probably related to a higher alkalinization of the material as well as to the high hydrophilicity of the carbonate. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47012.
Mechanical responses of Ecoflex silicone rubber: Compressible and incompressible behaviors
Authors: Steck D. , Qu J. , Kordmahale S. B. , Tscharnuter D. , Muliana A. , Kameoka J. 
Published: August 2018

ABSTRACTSilicon rubbers are widely used in a variety of products ranging from cooking utensils and electronics to medical devices and implants. Recently, they have sparked an interest among soft robotics researchers as they can be easily formed into various shapes and actuated in a relatively fast and easy way. In this article, we examine the nonlinear elastic response of a silicon rubber, Ecoflex, under both compressible and incompressible constraints. An experimental test on a uniaxial tension indicates a slight compressibility, and the compressibility increases with stretching. Five different constitutive material models are considered to describe the nonlinear elastic responses of Ecoflex under both compressible and incompressible conditions. In addition, finite element (FE) analysis is presented to analyze multiaxial response of structures or devices made of Ecoflex under complex boundary conditions. This study highlights the variations in the multiaxial response of structures at large deformations from different constitutive models under different compressible and incompressible constraints. For a high precision control in soft robotics applications, there is a need to understand the multiaxial response of silicon rubbers, especially under large deformations. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47025.
Isolation and characterization of SSR and EST‐SSR loci in Chamaecyparis formosensis (Cupressaceae)
Authors: Huang Chiun‐Jr , Chu Fang‐Hua , Liu Shau‐Chian , Tseng Yu‐Hsin , Huang Yi‐Shiang , Ma Li‐Ting , Wang Chieh‐Ting , You Ya Ting , Hsu Shuo‐Yu , Hsieh Hsiang‐Chih , Chen Chi‐Tsong , Chao Chi‐Hsiang 
Published: August 2018

Premise of the StudySimple sequence repeat (SSR) and expressed sequence tag (EST)–SSR markers were developed as tools for marker‐assisted selection of Chamaecyparis formosensis and for the molecular differentiation of cypress species.Methods and ResultsBased on the SSR‐enriched genomic libraries and transcriptome data of C. formosensis, 300 primer pairs were selected for initial confirmation, of which 19 polymorphic SSR and eight polymorphic EST‐SSR loci were chosen after testing in 92 individuals. The number of alleles observed for these 27 loci ranged from one to 17. The levels of observed and expected heterozygosity ranged from 0.000 to 1.000 and from 0.000 to 0.903, respectively. Most markers also amplified in C. obtusa var. formosana.ConclusionsThe developed SSR and EST‐SSR sequences are the first reported markers specific to C. formosensis. These markers will be useful for individual identification of C. formosensis and to distinguish cypress species such as C. obtusa var. formosana.