bluuebunny/crossref_metadata_2025_split huggingface dataset:
Thiol‐assisted bioinspired deposition of polyurethane onto cellulose as robust elastomer for reinforcing soy protein‐based composites
Authors: Yan Qian , Zhao Shujun , Kang Haijiao , Zhang Shifeng 
Published: March 2020

AbstractThe development of natural fiber‐reinforced composites is environmentally friendly and therefore presents great potential; however, these composites are characterized by poor water resistance and interfacial bonding, which therefore limits its practical applications. This study reported a facile and novel approach for the construction of a high‐performance microfibrillated cellulose (MFC) elastomer using thiol‐functionalized polyurethane (PU‐SH) with the assistance of a bioinspired dopamine platform. This elastomer was then employed as a reactive reinforcer to improve soy protein isolated (SPI) adhesive. The surface modification of MFC included the formation of a polydopamine (PDA) layer and Michael addition reactions between PU‐SH and PDA, which were characterized by the Fourier‐transform infrared spectroscopy, thermogravimetric analysis, and X‐ray photoelectron spectroscopy measurements. It was found that the high‐functional MFC elastomer served as a reactive cross‐linker that gave rise to multiple physical and chemical interactions with the SPI matrix. This resulted in the optimization of the crosslinking system, which ultimately contributed to the solution of the bottleneck issues for natural fiber‐reinforced composites. Consequently, the modified SPI‐based adhesives notably enhanced the shear strength to 1.38 MPa, displaying a 236.6% increment compared to the unmodified adhesive. This strategy may provide a new insight into the design and preparation of superior natural plant‐reinforced composites.
Community Psychology in higher education in Europe: Results of a survey and discussion of the basic competency approach
Authors: Roehrle Bernd , Akhurst Jacqui , Carr Nicholas , Herrera Sánchez Isabel M. , Arcidiacono Caterina , Lawthom Rebecca , Stark Wolfgang ,   EFPA Standing Committee on Community Psychology
Published: March 2020

AbstractThis report from the Standing Committee on Community Psychology of the European Federation of Psychological Association provides an overview of higher education in Community Psychology (CP) in 14 European countries. Our findings show that 10 countries have some kind of CP teaching in their educational system. Twenty European universities offer a CP‐oriented Master degree, two universities at the Bachelor level and 16 universities also have CP‐oriented Ph.D. programmes. The profiles of the universities focus on two areas: Community psychology in a pure form and a combination of social psychology and community psychology. The other universities vary between clinical, organisational psychology, and a pedagogical focus. Within a certain European emphasis, these universities are analysing and changing the social conditions of community life and mental health. The responding universities failed to report adequately on comprehensive core competences and key elements in CP. To compensate for this deficit, the Standing Committee on Community Psychology proposes to develop a primer of basic CP competences for inclusion in programmes like EuroPsy.
Antiproliferative Evaluation of Some 2‐[2‐(2‐Phenylethenyl)‐cyclopent‐3‐en‐1‐yl]‐1,3‐benzothiazoles: DFT and Molecular Docking Study
Authors: Ceylan Mustafa , Erkan Sultan , Yaglioglu Ayse Sahin , Akdogan Uremis Nuray , Koç Esra 
Published: March 2020

AbstractThe 2‐[2‐(2‐phenylethenyl)cyclopent‐3‐en‐1‐yl]‐1,3‐benzothiazoles were synthesized from the reactions of 7‐benzylidenebicyclo[3.2.0]hept‐2‐en‐6‐ones with 2‐aminobenzenethiol. The antiproliferative activities of 2‐[2‐(2‐phenylethenyl)cyclopent‐3‐en‐1‐yl]‐1,3‐benzothiazoles were determined against C6 (rat brain tumor) and HeLa (human cervical carcinoma cells) cell lines using BrdU cell proliferation ELISA assay. Cisplatin and 5‐fluorouracil (5‐FU) were used as standards. The most active compound was 2‐{(1S,2S)‐2‐[(E)‐2‐(4‐methylphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole against C6 cell lines with IC50=5.89 μm value (cisplatin, IC50=14.46 μm and 5‐FU, IC50=76.74 μm). Furthermore, the most active compound was 2‐{(1S,2S)‐2‐[(E)‐2‐(2‐methoxyphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole against HeLa cell lines with IC50=3.98 μm (cisplatin, IC50=37.95 μm and 5‐FU, IC50=46.32 μm).Additionally, computational studies of related molecules were performed by using B3LYP/6‐31G+(d,p) level in the gas phase. Experimental IR and NMR data were compared with the calculated results and were found to be compatible with each other. Molecular electrostatic potential (MEP) maps of the most active 2‐{(1S,2S)‐2‐[(E)‐2‐(2‐methoxyphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole against HeLa and the most active 2‐{(1S,2S)‐2‐[(E)‐2‐(4‐methylphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole against C6 were investigated, aiming to determine the region that the molecule is biologically active. Biological activities of mentioned molecules were investigated with molecular docking analyses. The appropriate target protein (PDB codes: 1 M17 for the HeLa cells and 1JQH for the C6 cells) was used for 2‐{(1S,2S)‐2‐[(E)‐2‐(2‐methoxyphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole and 2‐{(1S,2S)‐2‐[(E)‐2‐(4‐methylphenyl)ethenyl]cyclopent‐3‐en‐1‐yl}‐1,3‐benzothiazole molecules exhibiting the highest biological activity against HeLa and C6 cells in the docking studies. As a result, it was determined that these molecules are the best candidates for the anticancer drug.
Synthesis and Antiproliferative Activities of Novel Substituted 5‐Anilino‐α‐Glucofuranose Derivatives
Authors: Zhang Yaling , Wang Lili , Sun Baoli , Li Xiabing , Hou Qiaoli , Wang Wei , Li Baolin 
Published: March 2020

AbstractIn order to find novel antitumor candidate agents with high efficiency and low toxicity, 14 novel substituted 5‐anilino‐α‐glucofuranose derivatives have been designed, synthesized and evaluated for antiproliferative activities in vitro. Their structures were characterized by NMR (1H and 13C) and HR‐MS, and configuration (R/S) at C(5) was identified by two‐dimensional 1H,1H‐NOESY‐NMR spectrum. Their antiproliferative activities against human tumor cells were investigated by MTT assay. The results demonstrated that most of the synthesized compounds had antiproliferative effects comparable to the reference drugs gefitinib and lapatinib. In particular, (5R)‐5‐O‐(3‐chloro‐4‐{[5‐(4‐fluorophenyl)thiophen‐2‐yl]methyl}anilino)‐5‐deoxy‐1,2‐O‐(1‐methylethylidene)‐α‐glucofuranose (9da) showed the most potent antiproliferative effects against SW480, A431 and A549 cells, with IC50 values of 8.57, 5.15 and 15.24 μm, respectively. This work suggested 5‐anilino‐α‐glucofuranose as an antitumor core structure that may open a new way to develop more potent anti‐cancer agents.
Lignans and Terpenoids from the Leaves of Schisandra chinensis
Authors: Liu Guo‐Zhen , Liu Yan , Sun Yan‐Ping , Li Xiao‐Mao , Xu Zhen‐Peng , Jiang Peng , Rong Xiao‐Hui , Yang Bing‐You , Kuang Hai‐Xue 
Published: March 2020

AbstractFifteen constituents, including one new lignan (schisandroside E) and one new terpenoid (schisandenoid A) as well as nine known lignans and four known terpenoids, were isolated from Schisandra chinensis leaves. The structures of schisandroside E and schisandenoid A were established by entirely meticulous spectroscopic analysis (NMR, MS, CD, IR and UV). All compounds were tested for cytotoxicity against MGC‐803, Caco‐2 and Ishikawa cell lines. Some compounds showed strong cytotoxicity against these three cancer cell lines with IC50<1 μm.
Self‐Assembled, Highly Positively Charged, Allyl–Pd Crowns: Cavity‐Pocket‐Driven Interactions of Fluoroanions
Authors: Ferrer Montserrat , Gallen Albert , Gutiérrez Albert , Martínez Manuel , Ruiz Eliseo , Lorenz Yvonne , Engeser Marianne 
Published: March 2020

AbstractA series of dodecanuclear highly positively charged homo‐ and heterometallamacrocycles [{Pd(η3‐2‐Me‐C3H4)}6(4‐PPh2py)12{M2(tpbz)}3]18+ (M=Pd, Pt; tpbz=1,2,4,5‐tetrakis(diphenylphosphanyl)benzene were synthesized by the quantitative self‐assembly of {Pd(η3‐2‐Me‐C3H4)}+, {M2(tpbz)}4+ and 4‐PPh2py moieties in 2:1:4 molar ratio. The cationic assemblies were obtained as salts of different fluorinated anions with diverse sizes and electronic properties, namely BF4−, PF6−, SbF6− and CF3SO3−. The new crown‐like metallamacrocycles showed remarkable differences in their NMR spectra due to the presence of the different counteranions. On the basis of the observed variations, the metallacycles have been tested as catalytic precursors in allylic alkylation reactions. The anion‐dependent activity and selectivity has been analysed and compared with that of the corresponding monometallic allylic corners [Pd(η3‐2‐Me‐C3H4)(4‐PPh2py)2]X (X=BF4−, PF6−, SbF6−, CF3SO3−). DFT calculations have been employed in order to help to the interpretation of the experimental data and to model the anion–crown interactions.
Supramolecular Construction of a [16]‐Imidazolium Cage via a Quadruple [2+2] Photocycloaddition and Its Selective Fluorescent Recognition of Pyranine (HPTS)
Authors: Hua Kai , An Yuan‐Yuan , Wang Yao‐Yu , Han Ying‐Feng 
Published: March 2020

AbstractPolyimidazolium‐based cages are considered promising materials based on their fascinating properties and potential applications. These three‐dimensional functional structures are highly desirable for the recognition of particular guest molecules, however, their synthesis remains challenging. In this work, we have designed and synthesizes a pure [n]‐imidazolium (n=16) cage, the hexadecakisimidazolium salt H16‐2(PF6)16, from tetragonal octakisimidazolium salt H8‐1(PF6)8. The synthetic method involves formation of metal‐carbene templates, a quadruple photochemical [2+2] cycloaddition reaction and subsequent removal of metal ions. Specifically, the synthesized cage, featuring sixteen imidazolium moieties, demonstrated high efficiency for the selective fluorescent recognition of 8‐hydroxy‐1,3,6‐pyrene trisulfonate (HPTS). The present work not only further develops the metal‐carbene template strategy by exploiting a new type of polyimidazolium cage, but also provides encouraging prospects for the design of versatile imidazolium‐based functional acceptors.
Comprehensive elimination of oil spills on water surfaces by a graphene‐oil vacuum cleaner
Authors: Schedy Andreas , Oetken Marco 
Published: March 2020

AbstractDas Thema Umwelt und Umweltverschmutzungen ist ein großer Bestandteil des Naturwissenschaftlichen Unterrichts. Mit dem Nanomaterial „Graphen“ lassen sich unkompliziert und kostengünstig hocheffiziente Öl‐Adsorptionsschwämme herstellen, wodurch die Thematik der Ölverschmutzung auf dem Meer im Schulunterricht nun auch experimentell behandelt werden kann. Durch die Kombination eines Graphen‐Schwamms mit einem Saugsystem kann in einem Modellexperiment die großflächige Beseitigung von Ölverschmutzungen simuliert werden.
Ionic Liquid‐Intercalated Metallic MoS2 as a Superior Electrode for Energy Storage Applications
Authors: Reddy Inta Harish , Biswas Tanmoy , Ghosh Sourav , Kumar Rahul , Kanti Jana Sourav , Mahalingam Venkataramanan 
Published: March 2020

AbstractThe development of MoS2 in the metallic phase (1T‐MoS2) is of paramount interest as it exhibits superior electrochemical activities compared to its semiconducting polymorph (2H‐MoS2). In this work, an ionic liquid (IL)‐assisted solvothermal method was employed to produce the thermodynamically metastable 1T‐MoS2. Structural characterization of the material suggests the intercalation of the IL into MoS2. De‐intercalation of ILs from 1T‐MoS2 leads to the formation of 2H‐MoS2. Carbon cloth‐supported 1T‐MoS2(1T‐MoS2@CC) shows higher electrocatalytic activity towards acidic hydrogen evolution reaction (HER) by delivering a current density of 50 mA/cm2 at an overpotential of 210 mV whereas 2H‐MoS2@CC requires an overpotential of 260 mV to reach the same current density. In addition, the 1T‐MoS2@CC electrode delivers a high electrochemical double‐layer storage ability compared to 2H‐MoS2@CC in 1 M Na2SO4. The enhanced electrochemical activity of 1T‐MoS2 over 2H‐MoS2 may be due to the existence of conducting basal planes and the high interlayer spacing (about 1 nm) caused by the intercalation of ILs into the MoS2 layers.
Agronomic and physiological performance of an indica–japonica rice variety with a high yield and high nitrogen use efficiency
Authors: Zhu Kuanyu , Zhou Qun , Shen Yong , Yan Jiaqian , Xu Yunji , Wang Zhiqin , Yang Jianchang 
Published: March 2020

AbstractHybrid rice (Oryza sativa L.) varieties usually need more N application to produce a higher grain yield and exhibit lower N use efficiency (NUE) than inbreds. However, little information is available about the mechanism underlying an indica–japonica rice variety with high yield and high NUE under low N rates. This study investigated this issue. The indica–japonica hybrid rice variety Yongyou 2640 (Y‐2640) and the japonica inbred rice variety Lianjing 7 (L‐7) were grown in a paddy field at N rates of 0 and 200 kg N ha−1. The results showed that the grain yield and internal NUE (grain yield/total N uptake of plants) of Y‐2640 were 16–23% and 9–10%, respectively, higher than those of L‐7. A higher grain yield for Y‐2640 was mainly attributed to the greater spikelet number per unit area that resulted from greater root oxidation activity at panicle initiation and its higher crop growth rate and net assimilation rate before heading. A higher leaf area index and greater root length, root, and shoot biomass were the important agronomic traits of Y‐2640. Higher cytokinin content and the expression of genes involved in the amino acid transporters OsAAP1 and OsLHT1 in the roots and leaves, a higher photosynthetic NUE, and a greater N harvest index were the main physiological traits of Y‐2640. The results suggest that improved agronomic and physiological performance accounts for the high yield and high NUE for the indica–japonica hybrid rice variety.
Phase noise analysis of source injection coupled quadrature oscillator
Authors: Azizi Hengameh , Abbasalizadeh Soolmaz , Miar‐Naimi Hossein 
Published: March 2020

SummaryThis paper analyzes the thermally induced phase noise and the up‐conversion of flicker noise into phase noise of source injection coupled quadrature oscillator (SIC‐QOSC), for the first time. Furthermore, this paper provides a complete analysis for the injection current of the SIC‐QOSC and extracts the closed‐form expressions for it for the first time, too. These expressions lead to obtaining the harmonics of the injection current as well as the oscillation amplitude, which is necessary for the phase noise analysis. To evaluate the extracted equations, this paper compares the calculated results with appropriate simulations. Comparisons confirm the accuracy of the proposed injection current expressions and the phase noise formulas. Using the closed‐form equations of phase noise, designers can understand the SIC‐QOSC's design tradeoffs and design the oscillator for given phase noise.
Fabrication of Immunosensor Based on Polyaniline, Fullerene‐C60 and Palladium Nanoparticles Nanocomposite: An Electrochemical Detection Tool for Prostate Cancer
Authors: Suresh Lakkavarapu , Bondili Jayakumar Singh , Brahman Pradeep Kumar 
Published: March 2020

AbstractPresent work demonstrates the fabrication of new and facile sandwich‐type electrochemical immunosensor based on palladium nanoparticles (PdNPs), polyaniline (PANI) and fullerene‐C60 nanocomposite film modified glassy carbon electrode (PdNP@PANI‐C60/GCE) for ultrasensitive detection of Prostate‐specific antigen (PSA) biomarker. PdNP@PANI‐C60 was electrochemically synthesized on GCE and used as an electroactive substrate. PdNP@PANI‐C60 was characterized by scanning electron microscopy (SEM), energy‐dispersive X‐ray spectroscopy (EDS), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Primary antibody anti‐PSA (Ab1) was covalently immobilized on PdNP@PANI‐C60/GCE using NHS/EDC linkers. In the presence of PSA antigen, horseradish peroxidase secondary antibody (HRP‐Ab2) was brought into the surface of the electrode, developing stable amplified signals of H2O2 reduction. Under the optimal conditions, a linear curve for determination of PSA at the proposed immunosensor was 1.6×10−4 ng.mL−1 to 38 ng.mL−1 with a limit of detection (LOD) of 1.95×10−5 ng.mL−1. The proposed immunosensor was successfully validated in serum and urine samples towards PSA detection with satisfactory and acceptable results.
Enhanced hysteresis of suspended sediment transport in response to upstream damming: An example of the middle Yangtze River downstream of the Three Gorges Dam
Authors: Lyu Yiwei , Fagherazzi Sergio , Zheng Shan , Tan Guangming , Shu Caiwen 
Published: March 2020

AbstractThe peak in sediment transport in alluvial rivers generally lags behind the peak in discharge. It is thus not clear how the hysteresis in the sediment/discharge relationship may be impacted by damming, which can fundamentally alter the water and sediment regimes in the downstream reaches of the river. In this study, a total of 500 flood events in the Yichang–Chenglingji Reach (YCR) of the Middle Yangtze River immediately downstream of the Three Gorges Dam (TGD) are analysed to study the impacts of dam operations on the hysteresis of suspended sediment transport. Sediment rating curves, hysteresis patterns, as well as lag times, are investigated to determine the relationship between suspended sediment concentration (SSC) and flow discharge (Q) at different temporal scales, from inter‐annual to individual flood events, for the pre‐ and post‐TGD period from 1992 to 2002 and from 2003 to 2017, respectively. The results showed that the TGD operation decreased the frequency and magnitude of floods. The decrease in peak flow and increase in base flow weakened the flood contribution to the annual discharge by nearly 20%. However, the relative suspended sediment load contribution during flood events was much higher than the discharge contribution, and was little impacted by the dam. At seasonal and monthly scales, more than 80% of the suspended sediment was transported by ~65% of the water discharge in the summer and early autumn. The monthly SSC–Q relationship changed from a figure‐eight to an anti‐clockwise pattern after the construction of the TGD. For single flood events, the TGD operations significantly modified the downstream SSC–Q hysteresis patterns, increasing the frequency of anti‐clockwise loops and the lag time between peak Q and peak SSC. These adjustments were mainly caused by differences in the propagation velocities of flood and sediment waves and the sediment ‘storage–mobilization–depletion’ process, whereas the influence of lateral diversions was small. © 2020 John Wiley & Sons, Ltd.
Inside Cover: A novel in vivo Cerenkov luminescence image‐guided surgery on primary and metastatic colorectal cancer (J. Biophotonics 3/2020)
Authors: Zhang Zeyu , Qu Yawei , Cao Yu , Shi Xiaojing , Guo Hongbo , Zhang Xiaojun , Zheng Sheng , Liu Haifeng , Hu Zhenhua , Tian Jie 
Published: March 2020

AbstractThis study presents a novel intraoperative in vivo imaging approach which harnessed Cerenkov luminescence (CL) to detect primary and metastatic colorectal cancer (CRC) using clinically approved radiopharmaceuticals. In the mice and swine experiments, the proposed approach effectively improved the effect of CRC surgery. The approach is believed to be promising for utilizing CL in open surgery.Further details can be found in the article by Zeyu Zhang, Yawei Qu, Yu Cao et al. (e201960152)
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Performance of TDDFT Vertical Excitation Energies of Core‐Substituted Naphthalene Diimides
Authors: Narsaria Ayush K. , Ruijter Julian D. , Hamlin Trevor A. , Ehlers Andreas W. , Guerra Célia Fonseca , Lammertsma Koop , Bickelhaupt F. Matthias 
Published: March 2020

AbstractWe have evaluated the performance of various density functionals, covering generalized gradient approximation (GGA), global hybrid (GH) and range‐separated hybrid (RSH), using time dependent density functional theory (TDDFT) for computing vertical excitation energies against experimental absorption maximum (λmax) for a set of 10 different core‐substituted naphthalene diimides (cNDI) recorded in dichloromethane. The computed excitation in case of GH PBE0 is most accurate while the trend is most systematic with RSH LCY‐BLYP compared to λmax. We highlight the importance of including solvent effects for optimal agreement with the λmax. Increasing the basis set size from TZ2P to QZ4P has a negligible influence on the computed excitation energies. Notably, RSH CAMY‐B3LYP gave the least error for charge‐transfer excitation. The poorest agreement with λmax is obtained with semi‐local GGA functionals. Use of the optimally‐tuned RSH LCY‐BLYP* is not recommended because of the high computational cost and marginal improvement in results.
Impact of salt levels on the sensory profile and consumer acceptance of Italian dry‐cured ham
Authors: Schivazappa Cristina , Virgili Roberta 
Published: March 2020

AbstractBACKGROUNDReduction of the salt (NaCl) content in typical Italian dry‐cured ham is intended to reduce sodium dietary intake to meet World Health Organization (WHO) recommendations for the prevention of serious diseases. This reduction is a complex issue because of the multiple roles that salt plays in the product. Hams that were processed to obtain a final product with target salt levels (hams with reduced salt concentration and controls) were analyzed using chemical parameters (salt, moisture, fat, and proteolysis indexes). Their sensory properties were described by a trained panel and 87 consumers evaluated the impact of salt reduction on their liking for the products.RESULTSThe dry‐cured hams under investigation are representative of Italian dry‐cured hams, which are considered to be low and medium to high in terms of salt content. Consistent with the role of salt in proteolytic enzymes inhibition, there was an increase in the proteolysis index in fully matured dry‐cured hams with reduced salt content. Salt level affected saltiness perception but also texture, color, and, to a lesser extent, flavor intensity in matured dry‐cured hams. On average, reduced‐salt dry‐cured hams resulted in increased consumer liking. However, the resulting three consumer segments (37%, 27%, and 36% of the consumer cohort, respectively), differed in the acceptability ranking given to reduced‐salt hams and controls.CONCLUSIONThe tested reduction in salt content, besides improving the nutritional profile of dry‐cured ham, was effective in increasing consumers’ acceptance. These results were useful for exploring the effect of reducing salt concentration on consumer liking for dry‐cured hams. © 2020 Society of Chemical Industry