bluuebunny/crossref_metadata_2025_split huggingface dataset:
OCORRÊNCIA DE ESPÉCIES EXÓTICAS NA COMUNIDADE DO JAIRÉ NO RIO RIBEIRA DE IGUAPE
Authors: Barbieri Edison , Mendonça Jocemar Tomasino , Paes Eduardo Tavares 
Published: May 2018

O Vale do Ribeira de Iguape apresenta uma grande produtividade de piscicultura, bem como de pesca, tanto de água doce como marinha. Durante o ano de 1999 foram analisados os desembarques pesqueiros na comunidade do Jairê, a fim de verificar a composição das capturas e incidência de espécies exóticas na pesca profissional do Rio Ribeira de Iguape. Na pesca de água doce destacamse as capturas de manjuba (Anchoviella lepidentostole); sardinha (Opishtonema oglinum) e traíra (Hoplias ssp.). Dentre a produção anual, 8% foi de espécies exóticas, sendo encontrado o curimbatá (Prochiladus scrofa), bagre africano (Clarias ssp.), pacu (Piaractus mesopotamicus), carpa (Ciprinus capio) e tilápia (Oriocromis niloticus). Esses peixes exóticos são oriundos dos escapes dos tanques de cultivo da região, provocado pelas cheias dos rios. Os peixes exóticos no ambiente natural podem causar impactos para as espécies nativas, como a copetição, predação, exclusão, além de hibridação. Assim sendo, é necessário um maior rigor na liberação da construção dos tanques de cultivo próximos à margem dos rios, evitando serem atingidos pelas cheias para não causar prejuízos tanto para o piscicultor como para o ecossistema como um todo. Uma vez que já ocorre uma significativa presença de peixes exóticos na pesca profissional artesanal do Rio Ribeira de Iguape.
EFEITO DA TEMPERATURA E DO FOTOPERÍODO NO CRESCIMENTO E NAS RESPOSTAS FOTOSSINTÉTICAS DE Potamogeton pectinatus L. (POTAMOGETONACEAE), EM CULTIVO EXPERIMENTAL
Authors: Colares Ioni Gonçalves , Batista Thasiana de Lima , Magalhães Ubiracy Allan Sousa , Santos Luciane Cougo dos , Schlee Mirian Daniela Buchweitz 
Published: May 2018

Macrófitas submersas de regiões temperadas apresentam marcada sazonalidade no crescimento e biomassa por causa das trocas nas condições ambientais. O objetivo deste estudo foi avaliar, em cultivo experimental, o efeito da temperatura e do fotoperíodo no crescimento e nas respostas fotossintéticas de Potamogeton pectinatus L., coletada na Lagoa Verde. As plantas foram cultivadas em diferentes temperaturas e fotoperíodos, sendo o crescimento avaliado utilizando o número de folhas, de raízes e a biomassa. As respostas fotossintéticas foram avaliadas pelo método de evolução do oxigênio, montando curvas PI em diferentes temperaturas e fotoperíodos. A produção de folhas (30 ± 2,2 folhas) foi significativamente maior (p<0,05) na temperatura de 30ºCD/25ºCN, fotoperíodo de 10hL/14hE. Plantas mantidas em baixa temperatura (10ºCD/05ºCN) apresentaram uma produção de folhas reduzida nos três fotoperíodos testados, investindo no alongamento das já existentes. As maiores taxas de crescimento específico foliar foram observadas na temperatura baixa de 10ºCD/05ºCN. Valores de Pmax foram crescentes com o aumento do fotoperíodo em temperaturas de crescimento baixas (10ºCD/05ºCN) e decrescentes nas temperaturas altas (30ºCD/25ºCN), com maiores valores em 20ºCD/15ºC. O maior valor de a foi observado em plantas crescendo em temperaturas de 20ºCD/15ºCN, fotoperíodo de 10hL/14hE (a= 0,92 gO2gMS-1h-1/mmol m-2s-1). Plantas crescendo na temperatura de 30ºCD/25ºCN, fotoperíodo 14hL/10hE apresentaram valores elevados de Ic e Ik. As respostas fotossintéticas e o crescimento, apresentados por P. pectinatus neste estudo, mostram a plasticidade morfológica e fisiológica das plantas para sobreviver e se desenvolver nas diferentes condições sazonais de temperatura e fotoperíodo.
Observation of Intermittency‐Induced Critical Dynamics in Geomagnetic Field Time Series Prior to the Intense Magnetic Storms of March, June, and December 2015
Authors: Balasis Georgios , Daglis Ioannis A. , Contoyiannis Yiannis , Potirakis Stelios M. , Papadimitriou Constantinos , Melis Nikolaos S. , GIannakis Omiros , Papaioannou Athanasios , Anastasiadis Anastasios , Kontoes Charalampos 
Published: May 2018

AbstractCriticality has been proposed as a suitable framework to study the nonlinear system of the Earth's magnetosphere. The magnetic field variations observed by the midlatitude HellENIc GeoMagnetic Array with respect to the most intense magnetic storms (Dst <− 150 nT) of the current solar cycle (i.e., 17 March, 23 June, and 20 December 2015) are analyzed using the method of critical fluctuations. We show that the application of method of critical fluctuation to the HellENIc GeoMagnetic Array time series reveals the existence of intermittency‐induced criticality in the range of 6 to 45 hr prior to the onset of these events. The results suggest that the underlying dynamical processes in the magnetosphere prior to intense magnetic storms present dynamics analogous to those of thermal systems undergoing second‐order phase transition. Our findings demonstrate that the proposed method can be very relevant for the analysis of critical fluctuations in the framework of space systems.
Cooling‐Triggered Shapeshifting Hydrogels with Multi‐Shape Memory Performance
Authors: Hu Xiaobo , Zhang Daixuan , Sheiko Sergei S. 
Published: May 2018

AbstractHeating‐triggered shape actuation is vital for biomedical applications. The likely overheating and subsequent damage of surrounding tissue, however, severely limit its utilization in vivo. Herein, cooling‐triggered shapeshifting is achieved by designing dual‐network hydrogels that integrate a permanent network for elastic energy storage and a reversible network of hydrophobic crosslinks for “freezing” temporary shapes when heated. Upon cooling to 10 °C, the hydrophobic interactions weaken and allow recovery of the original shape, and thus programmable shape alterations. Further, multiple temporary shapes can be encoded independently at either different temperatures or different times during the isothermal network formation. The ability of these hydrogels to shapeshift at benign conditions may revolutionize biomedical implants and soft robotics.
A “Sticky” Mucin‐Inspired DNA‐Polysaccharide Binder for Silicon and Silicon–Graphite Blended Anodes in Lithium‐Ion Batteries
Authors: Kim Sunjin , Jeong You Kyeong , Wang Younseon , Lee Haeshin , Choi Jang Wook 
Published: May 2018

AbstractNew binder concepts have lately demonstrated improvements in the cycle life of high‐capacity silicon anodes. Those binder designs adopt adhesive functional groups to enhance affinity with silicon particles and 3D network conformation to secure electrode integrity. However, homogeneous distribution of silicon particles in the presence of a substantial volumetric content of carbonaceous components (i.e., conductive agent, graphite, etc.) is still difficult to achieve while the binder maintains its desired 3D network. Inspired by mucin, the amphiphilic macromolecular lubricant, secreted on the hydrophobic surface of gastrointestine to interface aqueous serous fluid, here, a renatured DNA‐alginate amphiphilic binder for silicon and silicon–graphite blended electrodes is reported. Mimicking mucin's structure comprised of a hydrophobic protein backbone and hydrophilic oligosaccharide branches, the renatured DNA‐alginate binder offers amphiphilicity from both components, along with a 3D fractal network structure. The DNA‐alginate binder facilitates homogeneous distribution of electrode components in the electrode as well as its enhanced adhesion onto a current collector, leading to improved cyclability in both silicon and silicon–graphite blended electrodes.
Laser‐Induced Molybdenum Carbide–Graphene Composites for 3D Foldable Paper Electronics
Authors: Zang Xining , Shen Caiwei , Chu Yao , Li Buxuan , Wei Minsong , Zhong Junwen , Sanghadasa Mohan , Lin Liwei 
Published: May 2018

AbstractVersatile and low‐cost manufacturing processes/materials are essential for the development of paper electronics. Here, a direct‐write laser patterning process is developed to make conductive molybdenum carbide–graphene (MCG) composites directly on paper substrates. The hierarchically porous MCG structures are converted from fibrous paper soaked with the gelatin‐mediated inks containing molybdenum ions. The resulting Mo3C2 and graphene composites are mechanically stable and electrochemically active for various potential applications, such as electrochemical ion detectors and gas sensors, energy harvesters, and supercapacitors. Experimentally, the electrical conductivity of the composite is resilient to mechanical deformation with less than 5% degradation after 750 cycles of 180° repeated folding tests. As such, the direct laser conversion of MCGs on papers can be applicable for paper‐based electronics, including the 3D origami folding structures.
Analysis of the Bipolar Resistive Switching Behavior of a Biocompatible Glucose Film for Resistive Random Access Memory
Authors: Park Sung Pyo , Tak Young Jun , Kim Hee Jun , Lee Jin Hyeok , Yoo Hyukjoon , Kim Hyun Jae 
Published: May 2018

AbstractResistive random access memory (RRAM) devices are fabricated through a simple solution process using glucose, which is a natural biomaterial for the switching layer of RRAM. The fabricated glucose‐based RRAM device shows nonvolatile bipolar resistive switching behavior, with a switching window of 103. In addition, the endurance and data retention capability of glucose‐based RRAM exhibit stable characteristics up to 100 consecutive cycles and 104 s under constant voltage stress at 0.3 V. The interface between the top electrode and the glucose film is carefully investigated to demonstrate the bipolar switching mechanism of the glucose‐based RRAM device. The glucose based‐RRAM is also evaluated on a polyimide film to verify the possibility of a flexible platform. Additionally, a cross‐bar array structure with a magnesium electrode is prepared on various substrates to assess the degradability and biocompatibility for the implantable bioelectronic devices, which are harmless and nontoxic to the human body. It is expected that this research can provide meaningful insights for developing the future bioelectronic devices.
Apatite Formation on Poly(aryl ether sulfone ketone) Surfaces by Means of Polydopamine Layers Functionalized with Phosphonate Groups
Authors: Liu Chengde , Liu Cheng , Gao Yu , Cheng Fang , Xiao Gary G. , Wang Jinyan , Jian Xigao 
Published: May 2018

AbstractPoly(aryl ether sulfone ketone) containing phthalazinone and biphenyl moieties (PPBESK) is a promising candidate for replacing metal bone implants. Apatite synthesized by polydopamine‐assisted hydroxyapatite formation (pHAF) is a promising coating for bone‐implant application. In this study, a modified pHAF technique is employed to induce the formation of apatite onto PPBESK while phosphonate groups, as potent inducers of apatite formation, are introduced through modification of a polydopamine (PDA) layer. The PPBESK layer and surface‐modified samples are evaluated by Raman spectroscopy, contact angle measurement, scanning electron microscope (SEM), and X‐ray photoelectron spectroscopy, respectively. The surface roughness of the samples increases following self‐polymerization of dopamine and decreases after reacting with POCl3. PPBESK water contact angle reduces significantly after coating with PDA. Microstructural and compositional analyses by SEM and X‐ray diffraction reveal that apatite coating induced by phosphonate groups exhibits a greater quantity of apatite formation, a higher ratio of Ca/P than that induced by a pristine PDA layer. The surfaces are characterized by culturing with MC3T3‐E1 preosteoblasts. Apatite induced by phosphonate group conjugated to PDA layer on PPBESK surface promotes cytocompatibility and osteogenesis of MC3T3‐E1 preosteoblasts in vitro.
Humidity‐Resistant, Fabric‐Based, Wearable Triboelectric Energy Harvester by Treatment of Hydrophobic Self‐Assembled Monolayers
Authors: Kim Min‐Ook , Pyo Soonjae , Song Giyoung , Kim Wondo , Oh Yongkeun , Park Chanho , Park Cheolmin , Kim Jongbaeg 
Published: May 2018

AbstractThe development of fabric‐based triboelectric energy harvesters is of great interest for converting human motion into electricity and is relevant for the development of wearable electronics. However, such harvesters exhibit significant degradation in performance under high humidity conditions. To solve this problem, a humidity‐resistant, fabric‐based triboelectric energy harvester by depositing self‐assembled monolayers (SAM) to increase the hydrophobicity of the fabric surface is demonstrated. The SAM coating is compatible with various fabrics and a noticeable improvement in triboelectric performance under high humidity conditions (relative humidity ≈85%) is observed, while the fabric maintains outstanding breathability. Moreover, the harvester exhibits no degradation in the output voltage over 5 × 104 cycles of loading/unloading, indicating excellent stability. The energy harvester is demonstrated as a wearable device by mounting it onto various parts of the human body and it is validated that the harvester successfully generates electrical power from human motion. Based on the humidity‐resistant triboelectric performance and the ease and cost‐effectiveness of the SAM coating, the harvester is expected to provide meaningful opportunities for the development of self‐powered smart clothes or wearable healthcare devices.
7‐Step Flow Synthesis of the HIV Integrase Inhibitor Dolutegravir
Authors: Ziegler Robert E. , Desai Bimbisar K. , Jee Jo‐Ann , Gupton B. Frank , Roper Thomas D. , Jamison Timothy F. 
Published: May 2018

AbstractDolutegravir (DTG), an important active pharmaceutical ingredient (API) used in combination therapy for the treatment of HIV, has been synthesized in continuous flow. By adapting the reported GlaxoSmithKline process chemistry batch route for Cabotegravir, DTG was produced in 4.5 h in sequential flow operations from commercially available materials. Key features of the synthesis include rapid manufacturing time for pyridone formation, one‐step direct amidation of a functionalized pyridone, and telescoping of multiple steps to avoid isolation of intermediates and enable for greater throughput.
Generation and Characterization of the First Persistent Platinum(I)‐Centered Radical
Authors: Kratish Yosi , Kostenko Arseni , Kaushansky Alexander , Tumanskii Boris , Bravo‐Zhivotovskii Dmitry , Apeloig Yitzhak 
Published: May 2018

AbstractThe first persistent platinum(I)‐centered radical was generated by homolytic cleavage of a Pt−HgSiR3bond of a mercury‐substituted platinum(II) complex. The PtIradical was characterized by EPR spectroscopy, chemical trapping experiments, and density functional theory (DFT) calculations.
From Isolated Ions to Multilayer Functional Materials Using Ion Soft Landing
Authors: Laskin Julia , Johnson Grant E. , Warneke Jonas , Prabhakaran Venkateshkumar 
Published: May 2018

AbstractThe ability to deposit intact polyatomic ions with well‐defined composition, charge state, and kinetic energy onto surfaces makes preparative mass spectrometry, also called ion soft landing, particularly attractive for preparing uniform molecular and ionic layers. Early studies characterized the structures, charge states, and reactivity of sparsely distributed soft‐landed species. The recent development of high‐flux ionization sources has opened up new opportunities for the precisely controlled preparation of both two‐dimensional structures and three‐dimensional multilayer architectures by ion soft landing. The deposition of large numbers of ions onto supports led to previously unknown phenomena being uncovered, thereby opening several exciting research directions. Furthermore, faster ion deposition has enabled fabrication of novel functional devices. This Review discusses important phenomena and highlights key developments pertaining to the preparation of well‐defined interfaces for studies in energy storage, catalysis, soft materials, and biology.
Dielectric properties of irradiated polymer/multiwalled carbon nanotube and its amino functionalized form
Authors: Atta Ali , Lotfy Salah , Abdeltwab Eslam 
Published: May 2018

ABSTRACTThe polymer/multiwalled carbon nanotube [poly(vinyl alcohol) (PVA)/carboxyethyl acrylate (CEA)]‐multiwalled carbon nanotube (MWCNT) and its amino functionalized (PVA/CEA)‐MWCNT‐NH2nanocomposite samples were successfully synthesized by the chemical method in the form of films. The samples were irradiated with gamma‐ray doses of 50 and 100 kGy and with ion beam fluence of 2.5 × 1018and 3.75 × 1018ions cm−2. The prepared nanocomposite samples were characterized using X‐ray diffraction and thermogravimetric analysis. The X‐ray diffraction and thermogravimetric analysis confirm the existence of the chemical crosslinking occurred in the polymer compositions. The AC electrical conductivity, electrical modulus, dielectric constant, and dielectric loss in the frequency range 102–106Hz are measured at room temperature. The electrical conductivity is increased with MWCNT doping, gamma‐irradiation, and by ion beam irradiation. A comprehensive analysis of the results revealed that dielectric properties are improved due to the induced physicochemical changes and conductive networks induced by ion beam irradiation. The behavioral effect of these embedded nanoparticles in a PVA matrix on the microstructural, dielectric, and electric properties is analyzed for possible device applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci.2018,135, 46647.
Ginsenoside Rg1 ameliorates liver fibrosis via suppressing epithelial to mesenchymal transition and reactive oxygen species production in vitro and in vivo
Authors: Wei Xiaoyu , Chen Yatang , Huang Wenxiang 
Published: May 2018

AbstractLiver fibrosis remains a major cause of morbidity and mortality with a complicated etiology and notorious complications, but there is a lack of efficacious therapeutics. Epithelial to mesenchymal transition (EMT) has a central role in the course of liver fibrosis, and thus, prevention of the development of EMT may control and even reverse liver fibrosis. This study aimed to examine the beneficial effect of ginsenoside Rg1, a phrenological active component isolated from Ginseng, and interrogate the mechanism in vitro and in vivo, with a focus on transforming growth factor‐β (TGF‐β)/Smad and Nrf2‐mediated signaling pathways. We employed a TGF‐β‐induced EMT model in HSC‐T6 cells and CCl4‐induced liver fibrosis in animal. We found that ginsenoside Rg1 significantly reduced cell proliferation and reversed transforming growth factor‐β (TGF‐β)‐induced EMT in HSC‐T6 cells; and ginsenoside Rg1 induced cell apoptosis, Ginsenoside Rg1 decreased the cellular level of collagen I and III in HSC‐T6 cells, indicating the amelioration of fibrosis. We showed that ginsenoside Rg1 reduced cellular reactive oxygen species (ROS). We also observed similar beneficial effects of ginsenoside Rg1 in vivo. The data showed that ginsenoside Rg1 decreased the level of alanine aminotransferase and aspartate aminotransferase, and collage type IV (IV‐C), hyaluronic acid, and laminin in carbon tetrachloride (CCl4)‐induced liver fibrotic model. Mechanistically, we showed that ginsenoside Rg1 tuned down the TGF‐β/Smad and stimulated Nrf‐2 nuclear translocation, which could explain the beneficial effects. In aggregate, our results demonstrate that ginsenoside Rg1 exhibits a protective effect on liver fibrosis via suppressing EMT and cellular ROS level. © 2018 BioFactors, 44(4):327–335, 2018
Predictive impact of the inflammation‐based indices in colorectal cancer patients with adjuvant chemotherapy
Authors: Tao Yong , Ding Lei , Yang Guan Gen , Qiu Jian Ming , Wang Dong , Wang Hongtao , Fu Chao 
Published: May 2018

AbstractIncreasing evidences reported that cancer‐triggered inflammation was associated with survival prognosis from colorectal cancer (CRC). However, the comprehensive effects of inflammatory‐based coNLR‐PLR that combines neutrophil‐to‐lymphocyte ratio (NLR) and platelet‐to‐lymphocyte ratio (PLR) rarely remain to be determined during chemotherapy. We retrospectively analyzed clinical data and baseline laboratory parameters from 153 colorectal cancer patients who underwent palliative adjuvant chemotherapy between January 2009 to January 2012. Receiver operating characteristic (ROC) curves and linear regression analyzed the predictive ability of NLR, and PLR for calculating the score of coNLR‐PLR. Overall survival (OS) and recurrence‐free survival (RFS) rates were estimated using the Kaplan‐Meier method and analyzed by the Cox proportional hazards model in univariate and multivariate analysis. The optimal cut‐off value of NLR and PLR was 2.24 and 186 by the ROC analysis. Kaplan‐Meier method showed that patients with high coNLR‐PLR score was associated with poorer OS and RFS (all P < .05). In univariate and multivariate analysis, it obtained that the coNLR‐PLR severed as a strong independent prognostic factor for OS and RFS (all P < .05). These results highlight that coNLR‐PLR index severed as a strong predictor of prognosis biomarker in CRC patients receiving adjuvant chemotherapy. Furthermore, its assessment could contribute to accurately predicting prognosis after chemotherapy in clinical practice.
The Use of Cyclometalated NHCs and Pyrazoles for the Development of Fully Efficient Blue PtII Emitters and Pt/Ag Clusters
Authors: Arnal Lorenzo , Fuertes Sara , Martín Antonio , Sicilia Violeta 
Published: May 2018

AbstractNew bis‐pyrazole complexes [Pt(C^C*)(RpzH)2]X, containing a cyclometalated N‐heterocyclic carbene ligand (HC^C*=1‐(4‐(ethoxycarbonyl)phenyl)‐3‐methyl‐1H‐imidazol‐2‐ylidene) were prepared as chloride (X=Cl−, RpzH: 3,5‐Me2pzH 1 a, 4‐MepzH 2 a, pzH 3 a), perchlorate (X=ClO4−, 1 b–3 b), or hexafluorophosphate (X=PF6−, RpzH: 3,5‐Me2pzH 1 c) salts. The X‐ray structure of 1 a showed that the Cl− anion is trapped by the cation through two N−H⋅⋅⋅Cl bonds. In solution of methanol, acetone and THF at RT, 1 a–3 a coexist in equilibrium with the corresponding [PtCl(C^C*)(RpzH)] (B) and RpzH species. In CH2Cl2, this equilibrium takes place just for 2 a and 3 a, but it is completely shifted to the left at 243 and 223 K for 2 a and 3 a, respectively. The low‐lying absorption and emission bands were assigned to intraligand (ILCT) charge transfer on the NHC group. Quantum yield measurements in PMMA films revealed that 1 b, 2 b and 1 c are amongst the most efficient blue‐light emitters, with values up to 100 %. Proton abstraction from the coordinated 3,5‐Me2pzH in 1 b by NEt3 and replacement by Ag+ afforded a neutral [Pt2Ag2] cluster containing Pt→Ag dative bonds.
Different Selectivities in the Insertions into C(sp2)−H Bonds: Benzofulvenes by Dual Gold Catalysis Competition Experiments
Authors: Plajer Alex J. , Ahrens Lukas , Wieteck Marcel , Lustosa Danilo M. , Babaahmadi Rasool , Yates Brian , Ariafard Alireza , Rudolph Matthias , Rominger Frank , Hashmi A. Stephen K. 
Published: May 2018

AbstractAn unprecedented, often almost quantitative access to tricyclic aromatic compounds by dual gold catalysis was developed. This synthetic route expands the scope of benzofulvene derivatives through a C(sp2)−H bond insertion in easily available starting materials. The insertion takes place with an exclusive chemoselectivity with respect to the competing aromatic C−H positions. A bidirectional synthesis with two competing ortho‐aryl C−H bonds in the selectivity‐determining step also shows perfect selectivity; this result is explained by a computational investigation of the two conceivable intermediates. The intramolecular competition of two non‐equivalent aryl C−H bonds with a benzylic methyl group also showed perfect selectivity.