bluuebunny/crossref_metadata_2025_split huggingface dataset:
EFEITO DA TERMORRETIFICAÇÃO NA QUALIDADE DE COLAGEM DE LÂMINAS DE MADEIRA PARA A PRODUÇÃO DE COMPENSADO
Authors: Ferreira Bruno Santos , Campos Cristiane Inácio de , Rangel Elidiane Cipriano 
Published: April 2018

O compensado é um painel de madeira que pode ser utilizado tanto na indústria moveleira quanto na construção civil, devido ao seu uso estrutural. Entretanto, para ser utilizado na construção civil, o compensado necessita ser resistente aos agentes xilófagos e à umidade, sem comprometer suas propriedades mecânicas. Nesse aspecto, a termorretificação surge como uma alternativa de tratamento, que aumenta a resistência da madeira ao ataque de fungos e a sua estabilidade dimensional. Desse modo, o objetivo deste trabalho foi avaliar o efeito da termorretificação na qualidade de colagem de lâminas de madeira para a produção de compensado. Para isso, foram realizados os testes de molhabilidade utilizando o goniômetro digital, para lâminas tratadas nas três temperaturas e na amostra de controle. Além disso, foi realizado, o ensaio de cisalhamento na linha de cola, para testar a qualidade da colagem segundo a ABNT NBR ISO 12466-1 (2006). Com os resultados obtidos pode-se perceber que a superfície da madeira tratada se tornou mais hidrofóbica com o aumento da temperatura, e isso resultou também na diminuição da resistência ao cisalhamento na linha de cola, pois o adesivo utilizado (fenol-formaldeído) é à base de água, contudo, os requisitos normativos foram atendidos.
Sistematização da Assistência de Enfermagem – potencialidades reconhecidas pelos enfermeiros de um hospital público
Authors: Krauzer Ivete Maroso , Gelbcke Francine Lima 
Published: April 2018

Este estudo teve o objetivo de identificar o perfil dos enfermeiros de um hospital público de Santa Catarina, os conteúdos que estes receberam sobre Sistematização da Assistência de Enfermagem (SAE) durante a graduação e aspectos potencializadores da SAE. Trata-se de uma pesquisa qualitativa, exploratória e descritiva, realizada por meio de 24 entrevistas, utilizando-se um questionário semiestruturado. Os dados foram tratados por análise de conteúdo. Os resultados apontaram que a maioria foram enfermeiros jovens, especialistas, pouco tempo de formados, com período de trabalho na instituição hospitalar entre quatro meses a 15 anos e oriundos das universidades do Sul do Brasil. Conheciam teoricamente a SAE; exercitaram os passos do método científico durante a graduação e reconheceram algumas teoristas de enfermagem. As potencialidades da SAE foram a valorização e o reconhecimento da enfermagem como profissão e a promoção na melhoria da qualidade da assistência que contribui para o aprendizado da enfermagem.Este estudo teve o objetivo de identificar o perfil dos enfermeiros de um hospital público de Santa Catarina, os conteúdos que estes receberam sobre Sistematização da Assistência de Enfermagem (SAE) durante a graduação e aspectos potencializadores da SAE. Trata-se de uma pesquisa qualitativa, exploratória e descritiva, realizada por meio de 24 entrevistas, utilizando-se um questionário semiestruturado. Os dados foram tratados por análise de conteúdo. Os resultados apontaram que a maioria foram enfermeiros jovens, especialistas, pouco tempo de formados, com período de trabalho na instituição hospitalar entre quatro meses a 15 anos e oriundos das universidades do Sul do Brasil. Conheciam teoricamente a SAE; exercitaram os passos do método científico durante a graduação e reconheceram algumas teoristas de enfermagem. As potencialidades da SAE foram a valorização e o reconhecimento da enfermagem como profissão e a promoção na melhoria da qualidade da assistência que contribui para o aprendizado da enfermagem.
Reference gene selection for qRT-PCR assays inStellera chamaejasmesubjected to abiotic stresses and hormone treatments based on transcriptome datasets
Authors: Liu Xin , Guan Huirui , Song Min , Fu Yanping , Han Xiaomin , Lei Meng , Ren Jingyu , Guo Bin , He Wei , Wei Yahui 
Published: April 2018

BackgroundStellera chamaejasmeLinn, an important poisonous plant of the China grassland, is toxic to humans and livestock. The rapid expansion ofS. chamaejasmehas greatly damaged the grassland ecology and, consequently, seriously endangered the development of animal husbandry. To draft efficient prevention and control measures, it has become more urgent to carry out research on its adaptive and expansion mechanisms in different unfavorable habitats at the genetic level. Quantitative real-time polymerase chain reaction (qRT-PCR) is a widely used technique for studying gene expression at the transcript level; however, qRT-PCR requires reference genes (RGs) as endogenous controls for data normalization and only through appropriate RG selection and qRT-PCR can we guarantee the reliability and robustness of expression studies and RNA-seq data analysis. Unfortunately, little research on the selection of RGs for gene expression data normalization inS. chamaejasmehas been reported.MethodIn this study, 10 candidate RGs namely,18S,60S,CYP,GAPCP1,GAPDH2,EF1B,MDH,SAND,TUA1, andTUA6, were singled out from the transcriptome database ofS. chamaejasme, and their expression stability under three abiotic stresses (drought, cold, and salt) and three hormone treatments (abscisic acid, ABA; gibberellin, GA; ethephon, ETH) were estimated with the programs geNorm, NormFinder, and BestKeeper.ResultOur results showed thatGAPCP1andEF1Bwere the best combination for the three abiotic stresses, whereasTUA6andSAND,TUA1andCYP,GAPDH2and60Swere the best choices for ABA, GA, and ETH treatment, respectively. Moreover,GAPCP1and60Swere assessed to be the best combination for all samples, and18Swas the least stable RG for use as an internal control in all of the experimental subsets. The expression patterns of two target genes (P5CS2andGI) further verified that the RGs that we selected were suitable for gene expression normalization.DiscussionThis work is the first attempt to comprehensively estimate the stability of RGs inS. chamaejasme. Our results provide suitable RGs for high-precision normalization in qRT-PCR analysis, thereby making it more convenient to analyze gene expression under these experimental conditions.
Oligotrophic wetland sediments susceptible to shifts in microbiomes and mercury cycling with dissolved organic matter addition
Authors: Graham Emily B. , Gabor Rachel S. , Schooler Shon , McKnight Diane M. , Nemergut Diana R. , Knelman Joseph E. 
Published: April 2018

Recent advances have allowed for greater investigation into microbial regulation of mercury toxicity in the environment. In wetlands in particular, dissolved organic matter (DOM) may influence methylmercury (MeHg) production both through chemical interactions and through substrate effects on microbiomes. We conducted microcosm experiments in two disparate wetland environments (oligotrophic unvegetated and high-C vegetated sediments) to examine the impacts of plant leachate and inorganic mercury loadings (20 mg/L HgCl2) on microbiomes and MeHg production in the St. Louis River Estuary. Our research reveals the greater relative capacity for mercury methylation in vegetated over unvegetated sediments. Further, our work shows how mercury cycling in oligotrophic unvegetated sediments may be susceptible to DOM inputs in the St. Louis River Estuary: unvegetated microcosms receiving leachate produced substantially more MeHg than unamended microcosms. We also demonstrate (1) changes in microbiome structure towardsClostridia, (2) metagenomic shifts toward fermentation, and (3) degradation of complex DOM; all of which coincide with elevated net MeHg production in unvegetated microcosms receiving leachate. Together, our work shows the influence of wetland vegetation in controlling MeHg production in the Great Lakes region and provides evidence that this may be due to both enhanced microbial activity as well as differences in microbiome composition.
Supporting child witnesses during identification lineups: Exploring the effectiveness of registered intermediaries
Authors: Wilcock Rachel , Crane Laura , Hobson Zoe , Nash Gilly , Kirke‐Smith Mimi , Henry Lucy A. 
Published: April 2018

SummaryPerformance at identification lineup was assessed in eighty‐five 6‐ to 11‐year‐old typically developing children. Children viewed a live staged event involving 2 male actors, and were asked to identify the perpetrators from 2 separate lineups (one perpetrator‐present lineup and one perpetrator‐absent lineup). Half the children took part in lineups adapted by a registered intermediary (an impartial, trained professional who facilitates understanding and communication between vulnerable witnesses and members of the justice system), and half took part in “best‐practice” lineups, according to the current guidance for eyewitness identification in England and Wales. Children receiving assistance from a registered intermediary (relative to children who received best‐practice lineups) were more accurate in their identifications for perpetrator‐present lineups, and there was some evidence that they were also more accurate for perpetrator‐absent lineups. This provides the first empirical evidence for the effectiveness of registered intermediary support during identification lineups.
A Bubble‐Derived Strategy to Prepare Multiple Graphene‐Based Porous Materials
Authors: Zhang Rujing , Hu Ruirui , Li Xinming , Zhen Zhen , Xu Zhenhua , Li Na , He Limin , Zhu Hongwei 
Published: April 2018

AbstractGraphene‐based porous structures have triggered tremendous attention due to their promising application in many fields. Recent progress has yielded structures with stochastic porous networks, which limit their controllability and potential performance. It still remains a big challenge for the scalable production to integrate the 2D building block into engineered porous architectures in multidimensions. Here, a versatile technique based on soft bubble templating and fixation by freezing is described to fabricate 3D bubble‐derived graphene foams (BGFs) and 2D bubble‐derived graphene porous membranes (BGPMs). These light‐weight novel structures are carefully tuned. The BGFs show high adsorption capabilities for organic solvents and good recovery in structural deformation. Furthermore, applications of BGFs and BGPMs in strain sensors for wearable devices are discussed, working as a combined system which can both detect the compressive and tensile deformation. This technique can be extended to assemble other nanomaterials as building blocks into macroscopic configurations.
Flexible Near‐Infrared Plastic Phototransistors with Conjugated Polymer Gate‐Sensing Layers
Authors: Han Hyemi , Lee Chulyeon , Kim Hwajeong , Kim Youngkyoo 
Published: April 2018

AbstractFlexible near‐infrared (NIR) light‐sensing detectors are strongly required in the fast‐growing flexible electronics era, because they can serve as a vision system like eyes in various innovative applications including humanoid robots. Recently, keen interest has been paid to organic phototransistors due to their unique signal amplification and active matrix driving features over organic photodiodes. However, conventional NIR‐sensing organic phototransistors suffer from the limited use of organic materials because the channel layers play a dual role in both charge transport and sensing so that organic semiconducting materials with reasonably high charge mobility can be applied only. Here, it is demonstrated that a conjugated polymer, poly[{2,5‐bis‐(2‐ethylhexyl)‐3,6‐bis‐(thien‐2‐yl)‐pyrrolo[3,4‐c]pyrrole‐1,4‐diyl}‐co‐{2,2′‐(2,1,3‐benzothiadiazole)]‐5,5′‐diyl}] (PEHTPPD‐BT), which exhibits no transistor performance as a channel layer, can stably detect a NIR light (up to 1000 nm) as a gate‐sensing layer (GSL) when it is placed between gate‐insulating layers and gate electrodes. The flexible array (10 × 10) detectors with the PEHTPPD‐BT GSLs could effectively sense NIR light without visible light interference by applying visible light cut films.
Site‐Controlled Single‐Photon Emitters Fabricated by Near‐Field Illumination
Authors: Biccari Francesco , Boschetti Alice , Pettinari Giorgio , La China Federico , Gurioli Massimo , Intonti Francesca , Vinattieri Anna , Sharma MayankShekhar , Capizzi Mario , Gerardino Annamaria , Businaro Luca , Hopkinson Mark , Polimeni Antonio , Felici Marco 
Published: April 2018

AbstractMany of the most advanced applications of semiconductor quantum dots (QDs) in quantum information technology require a fine control of the QDs' position and confinement potential, which cannot be achieved with conventional growth techniques. Here, a novel and versatile approach for the fabrication of site‐controlled QDs is presented. Hydrogen incorporation in GaAsN results in the formation of N–2H and N–2H–H complexes, which neutralize all the effects of N on GaAs, including the N‐induced large reduction of the bandgap energy. Starting from a fully hydrogenated GaAs/GaAsN:H/GaAs quantum well, the NH bonds located within the light spot generated by a scanning near‐field optical microscope tip are broken, thus obtaining site‐controlled GaAsN QDs surrounded by a barrier of GaAsN:H (laterally) and GaAs (above and below). By adjusting the laser power density and exposure time, the optical properties of the QDs can be finely controlled and optimized, tuning the quantum confinement energy over more than 100 meV and resulting in the observation of single‐photon emission from both the exciton and biexciton recombinations. This novel fabrication technique reaches a position accuracy <100 nm and it can easily be applied to the realization of more complex nanostructures.
Few‐Layer GeAs Field‐Effect Transistors and Infrared Photodetectors
Authors: Guo Jian , Liu Yuan , Ma Yue , Zhu Enbo , Lee Shannon , Lu Zixuan , Zhao Zipeng , Xu Changhao , Lee Sung‐Joon , Wu Hao , Kovnir Kirill , Huang Yu , Duan Xiangfeng 
Published: April 2018

AbstractThe family of 2D semiconductors (2DSCs) has grown rapidly since the first isolation of graphene. The emergence of each 2DSC material brings considerable excitement for its unique electrical, optical, and mechanical properties, which are often highly distinct from their 3D counterparts. To date, studies of 2DSC are majorly focused on group IV (e.g., graphene, silicene), group V (e.g., phosphorene), or group VIB compounds (transition metal dichalcogenides, TMD), and have inspired considerable effort in searching for novel 2DSCs. Here, the first electrical characterization of group IV–V compounds is presented by investigating few‐layer GeAs field‐effect transistors. With back‐gate device geometry, p‐type behaviors are observed at room temperature. Importantly, the hole carrier mobility is found to approach 100 cm2 V−1 s−1 with ON–OFF ratio over 105, comparable well with state‐of‐the‐art TMD devices. With the unique crystal structure the few‐layer GeAs show highly anisotropic optical and electronic properties (anisotropic mobility ratio of 4.8). Furthermore, GeAs based transistor shows prominent and rapid photoresponse to 1.6 µm radiation with a photoresponsivity of 6 A W−1 and a rise and fall time of ≈3 ms. This study of group IV–V 2DSC materials greatly expands the 2D family, and can enable new opportunities in functional electronics and optoelectronics based on 2DSCs.
A Novel Nanocomposite with Superior Antibacterial Activity: A Silver‐Based Metal Organic Framework Embellished with Graphene Oxide
Authors: Firouzjaei Mostafa Dadashi , Shamsabadi Ahmad Arabi , Sharifian Gh. Mohammad , Rahimpour Ahmad , Soroush Masoud 
Published: April 2018

AbstractSilver‐based nanomaterials have attracted considerable attention due to their antimicrobial activities. In this work, a silver (Ag)‐based metal organic framework (Ag‐MOF) is embellished with graphene‐oxide (GO), leading to the fabrication of a novel Ag‐based nanocomposite (GO‐Ag‐MOF) whose biocidal activity is higher than those of Ag‐MOF and GO nanomaterials. The nanocomposite is characterized using X‐ray photoelectron spectroscopy, transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectra, ultraviolet−visible absorption spectra, X‐ray powder diffraction, dynamic light scattering, and nitrogen gas adsorption/desorption. The characterization shows that the Ag‐MOF nanoparticles are uniformly dispersed on the GO nanosheets surfaces without any agglomeration. Toxicities of GO‐Ag‐MOF, Ag‐MOF, and GO are assessed against the Gram‐negative bacteria, Escherichia coli and the Gram‐positive bacteria, Bacillus subtilis using the growth curve, fluorescence imaging, and flow cytometry methods. GO‐Ag‐MOF shows an outstanding antibacterial activity (higher than those of the Ag‐MOF and GO alone). The interaction of GO‐Ag‐MOF and Ag‐MOF with the bacteria leads to the extirpation of 95 and 85% of live bacteria cells, respectively. This study indicates that GO‐Ag‐MOF is a promising antibacterial nanocomposite, especially for biomedical applications.
Constructing Hierarchical Heterostructured Mn3O4/Zn2SnO4 Materials for Efficient Gas Sensing Reaction
Authors: Zhou Tingting , Liu Xiupeng , Zhang Rui , Wang Lili , Zhang Tong 
Published: April 2018

AbstractHybrid 1D nanomaterials with hierarchical structure have received a great deal of attention as sensing materials for gas sensors due to their high surface area, excellent catalytic performance, and robust structure. Novel Zn2SnO4 nanorod‐decorated Mn3O4 nanowire 1D nanostructures are prepared by a two‐step hydrothermal method and subsequent heat treatment for application in gas sensors. The branch‐like Mn3O4/Zn2SnO4 composite‐based sensor exhibits high sensitivity and excellent selectivity for the detection of acetone gas. Importantly, the sensitivity of acetone‐gas sensor can be improved by optimizing the content of Zn2SnO4 nanorods on the surface of Mn3O4 nanowires. As a result, such a 1D–1D branch‐like Mn3O4/Zn2SnO4 hierarchical structure with effective p–n heterojunction and large specific surface area would display excellent electron transport property, which determines if the material is capable of recognizing target gases, thus enabling the sensor to achieve high sensitivity.
Strategy for Enhancing Interfacial Effect of Bifunctional Electrocatalyst: Infiltration of Cobalt Nanooxide on Perovskite
Authors: Kim Seona , Kwon Ohhun , Kim Changmin , Gwon Ohhun , Jeong Hu Young , Kim Ka‐Hyun , Shin Jeeyoung , Kim Guntae 
Published: April 2018

AbstractRecently, hybrid catalysts are a critical issue to realize electrocatalysts having competitive price and effective bifunctional activity for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). In the case of hybrid catalysts, synergistic effect is observed through electronic and structural reconstructions at the interface between dissimilar oxides, which provides the improved catalytic activity for ORR and OER. Herein, the Co3O4 deposited Nd0.5Sr0.5CoO3−δ (NSC) catalyst is designed to achieve the strain and ligand effect considered as rationale for synergistic effect. A well‐designed bifunctional hybrid catalyst (Opt‐NSC@Co3O4) is prepared through a useful infiltration technique by tuning the wettability of the precursor solution and the concentration of the Co3O4. Through systematic analysis and re‐design, both the onset potential and the limiting current density for ORR and OER are significantly improved with unique microstructure fabricated by the infiltration technique. Opt‐NSC@Co3O4 shows outstanding cell performance and excellent stability during 60 h with the discharge–charge voltage gap of 0.5 V for a hybrid Li‐air battery. The enhanced electrochemical performance suggests that the derived hybrid catalysts fabricated by the advanced infiltration technique could be promising materials for environmentally benign energy‐related applications.
The Effect of Thickness‐Tunable ZrO2 Shell on Enhancing the Tunneling Magnetoresistance of Fe3O4 Supraparticles
Authors: Mi Shu , Xie Yong , Li Yuanyuan , Liu Rui , Liu Xiaoduo , Smalyukh Ivan I. , Chen Ziyu 
Published: April 2018

AbstractThe core–shell Fe3O4@ZrO2 nanoparticles with controllable shell thickness and core dimensions are synthesized using solvothermal approaches. The introduction of the insulator ZrO2 shell allows realizing the enhancement of tunneling magnetoresistance (TMR) effect of the functional nanomaterials. The influences of temperature, magnetic field, and shell thickness on the TMR are explored. With the shell thickness ≈3 nm TMR ratio of 10% is obtained, which improves the MR compared to the pure Fe3O4 counterpart of 5.7%. Furthermore, the MR is increased first and then decreases with increase of the shell thickness, which suggests that the addition of insulated shell‐layer promotes the electron tunneling among the supraparticles and thereby increases the MR. The fault‐cutting data indicate that the tunneling mechanism occurs mainly through the magnetic‐insulator interfaces rather than the interior nanoparticle interfaces. In addition, the MR with different core‐size presents a monotonic increase with decrease of the size of core.
Giant Auxetic Behaviour in Engineered Graphene
Authors: Grima Joseph N. , Grech Michael C. , Grima‐Cornish James N. , Gatt Ruben , Attard Daphne 
Published: April 2018

AbstractGraphene monolayers engineered to adopt a corrugated conformation are found to exhibit very pronounced lateral expansion characteristics upon uniaxial stretching in specific directions, i.e. giant negative Poisson's ratio (auxeticity). Such anomalous properties are manifested in‐plane and may be controlled through the shape and amplitude of the wave‐like pattern of the corrugation, which in the case of graphene may be controlled through the introduction of patterned ‘defects’. This confirms that auxeticity via corrugation can be achieved even at the nanoscale, as demonstrated here for graphene with patterned ‘defects’, suggesting that this mechanism should be operational at different scales of structures, thus providing a new blueprint for the design or manufacture of auxetic materials and metamaterials which can have tailor‐made giant negative Poisson's ratio properties.
Fast Sodium‐Ion Conductivity in Supertetrahedral Phosphidosilicates
Authors: Haffner Arthur , Hatz Anna‐Katharina , Moudrakovski Igor , Lotsch Bettina V. , Johrendt Dirk 
Published: April 2018

AbstractFast sodium‐ion conductors are key components of Na‐based all‐solid‐state batteries which hold promise for large‐scale storage of electrical power. We report the synthesis, crystal‐structure determination, and Na+‐ion conductivities of six new Na‐ion conductors, the phosphidosilicates Na19Si13P25, Na23Si19P33, Na23Si28P45, Na23Si37P57, LT‐NaSi2P3 and HT‐NaSi2P3, based entirely on earth‐abundant elements. They have SiP4 tetrahedra assembled interpenetrating networks of T3 to T5 supertetrahedral clusters and can be hierarchically assigned to sphalerite‐ or diamond‐type structures. 23Na solid‐state NMR spectra and geometrical pathway analysis show Na+‐ion mobility between the supertetrahedral cluster networks. Electrochemical impedance spectroscopy shows Na+‐ion conductivities up to σ (Na+)=4×10−4 S cm−1. The conductivities increase with the size of the supertetrahedral clusters through dilution of Na+‐ions as the charge density of the anionic networks decreases.