bluuebunny/crossref_metadata_2025_split huggingface dataset:
Tutuola, Amos
Authors: Brown Michelle Lynn 
Published: June 2017

Abstract

Amos Tutuola was a Nigerian novelist and short‐story writer who lived from 1920 to 1997. He is best known for introducing Yoruba oral narrative traditions into mainstream written Anglophone Nigerian literature. Many of his novels and stories are episodic hero quests involving supernatural elements. His earliest novel,
The Palm‐Wine Drinkard and His Dead Palm‐Wine Tapster in the Deads’ Town
(1952), attracted immediate international attention and established Tutuola's influence on African literature by asserting the artistic value of Yoruba oral narratives and themes. His example signaled liberation from previous adherence to strictly Western novelistic conventions.
Villaverde, Cirilo
Authors: Williams Claudette 
Published: June 2017

Abstract

A major actor in the anti‐colonial politics of nineteenth‐century Cuba, Cirilo Villaverde is best known as the author of the iconic antislavery novel
Cecilia Valdés
(1882). The author used his novel to express his hostility to the practices and premises of slavery and to expose the complex dynamics of the institution. Villiaverde's antislavery sentiments exist in a symbiotic alliance with his
independentista
politics and paradoxically, in a dissonant relationship with the Eurocentricism of his anti‐black racism.
Chinese Literature
Authors: Lupke Christopher 
Published: June 2017

AbstractThe unequal relationship between the so‐called First World and China has marked its literature in indelible ways. Although authors have negotiated this unequal relationship in a variety of ways, the fact that issues of uneven development, colonial incursion, all‐out war, the extraction of natural resources and agricultural products, the raiding of the Chinese national coffers, and the imposition cultural and psychological complexes add up to the fact that Chinese literatures certainly can be and should be viewed in a postcolonial light.
A priority supposition for estimation of time‐dependent changes in thickness and weight of polymeric flat sheet membranes fabricated by the nonsolvent induced phase separation (NIPS) technique
Authors: Asgarpour Khansary Milad , Aroon Mohammad Ali , Marjani Azam , Shirazian Saeed 
Published: June 2017

AbstractDuring the fabrication procedure of polymeric membranes using nonsolvent induced phase inversion technique, thickness and weight of the polymeric cast film change rapidly. The only available guideline just presents a qualitative criterion for thickness change in which “penetration of the denser species into the film and the elimination of the lighter ones from film to coagulation bath” have been related to the densification of the cast solution and its thickness reduction. While it is well‐suited for cellulose acetate/acetone/water ternary system, it is not applicable to our investigated systems, that is, polyethersulfone/n‐methyl‐pyrolidine/water and polysulfone/N‐methylpyrrolidone/water. Thus, here the thermo‐kinetic behavior of NIPS process was discussed, and then a thermodynamic model was developed, in which only initial cast film and final membrane properties were used as inputs. Two new simple suppositions were derived and examined. The use of thermodynamic modeling approach results in desirable estimation of overall changes, and the proposed suppositions also can be reliably used for prediction of changes in mass and thickness experienced by cast film NIPS process. It was shown that without the implication of some serious assumptions, it is impossible to derive the old supposition from theoretical concepts. It was also found that the interpretation of film thickness reduction in literatures cannot be validated. Using the presented theoretical concept, one can obtain an overview of the decrease and/or increase in thickness and/or weight of final fabricated membrane prior to any experimental investigation.
Two‐Dimensional Metal–Organic Framework Nanosheets for Membrane‐Based Gas Separation
Authors: Peng Yuan , Li Yanshuo , Ban Yujie , Yang Weishen 
Published: June 2017

AbstractMetal–organic framework (MOF) nanosheets could serve as ideal building blocks of molecular sieve membranes owing to their structural diversity and minimized mass‐transfer barrier. To date, discovery of appropriate MOF nanosheets and facile fabrication of high performance MOF nanosheet‐based membranes remain as great challenges. A modified soft‐physical exfoliation method was used to disintegrate a lamellar amphiprotic MOF into nanosheets with a high aspect ratio. Consequently sub‐10 nm‐thick ultrathin membranes were successfully prepared, and these demonstrated a remarkable H2/CO2 separation performance, with a separation factor of up to 166 and H2 permeance of up to 8×10−7 mol m−2 s−1 Pa−1 at elevated testing temperatures owing to a well‐defined size‐exclusion effect. This nanosheet‐based membrane holds great promise as the next generation of ultrapermeable gas separation membrane.
Simulated Isotope Exchange Patterns Enable Protein Structure Determination
Authors: Borysik Antoni J. 
Published: June 2017

AbstractUnderstanding the myriad protein–protein interactions required for cell function requires efficient leveraging of biophysical data to drive computational docking. The detailed insight into protein interfaces provided by isotope exchange endows this experimental technique with a unique importance for docking approaches. However, progress in coupling these methods is hindered by the inability to interpret the complex exchange patterns in relation to protein structure. A method to simulate protein isotope exchange patterns from docking outputs is described and its utility to guide the selection of native assemblies demonstrated. Unique signatures are generated for each docking pose, allowing high‐throughput ranking of whole docking simulations by pairwise comparison to experimental outputs. Native assemblies are obtained using nothing but their simulated profiles as restraints and experimental difference data for individual proteins are sufficient to drive structure determination for the whole complex.
Vom Boran zum Borylen ohne Reduktion: ambiphiles Verhalten einer monovalenten Silylisonitril‐Borverbindung
Authors: Arrowsmith Merle , Auerhammer Dominic , Bertermann Rüdiger , Braunschweig Holger , Celik Mehmet Ali , Erdmannsdörfer Julian , Krummenacher Ivo , Kupfer Thomas 
Published: June 2017

AbstractDie Deprotonierung von [(cAAC)BH2(CN)] ermöglicht den Zugang zum stabilen Borylanion, [(cAAC)BH(CN)]−. Während die Addition weicher Elektrophile am nukleophilen Boratom stattfindet, addieren härtere Silylelektrophile am härteren terminalen Stickstoff der Cyanogruppe. Die daraus entstandene Verbindung, [(cAAC)BH(CNSiPh3)], reagiert sowohl als ein Silyliumboryl‐Nukleophil wie auch als ein neutrales Silylisonitril‐Borylen.
The Direct Catalytic Oxidation of Methane to Methanol—A Critical Assessment
Authors: Ravi Manoj , Ranocchiari Marco , van Bokhoven Jeroen A. 
Published: June 2017

AbstractDespite the large number of disparate approaches for the direct selective partial oxidation of methane, none of them has translated into an industrial process. The oxidation of methane to methanol is a difficult, but intriguing and rewarding, task as it has the potential to eliminate the prevalent natural gas flaring by providing novel routes to its valorization. This Review considers the synthesis of methanol and methanol derivatives from methane by homogeneous and heterogeneous pathways. By establishing the severe limitations related to the direct catalytic synthesis of methanol from methane, we highlight the vastly superior performance of systems which produce methanol derivatives or incorporate specific measures, such as the use of multicomponent catalysts to stabilize methanol. We thereby identify methanol protection as being indispensable for future research on homogeneous and heterogeneous catalysis.
Four‐, five‐ and six‐coordinated transition metal complexes based on naphthalimide Schiff base ligands: Synthesis, crystal structure and properties
Authors: Xu Yuling , Zhang Han , Shen Kesheng , Mao Shanshan , Shi Xinkui , Wu Huilu 
Published: June 2017

Two bidentate Schiff base ligands (HL1 = N‐n‐butyl‐4‐[(E)‐2‐(((2‐aminoethyl)imino)methyl)phenol]‐1,8‐naphthalimide; and HL2 = N‐n‐butyl‐4‐[(E)‐2‐(((2‐aminoethyl)imino)methyl)‐6‐methoxyphenol]‐1,8‐naphthalimide) with their metal complexes [Cu(L1)2] (1), [Zn(L1)2(Py)]2⋅H2O (2) and [Ni(L2)2(DMF)2] (3) have been synthesized and characterized. Single‐crystal X‐ray structure analysis reveals that complex 1 has a four‐coordinated square geometry, while complex 2 is a five‐coordinated square pyramidal structure and complex 3 is a distorted six‐coordinated octahedral structure. Cyclic voltammograms of 1 indicate an irreversible Cu2+/Cu+ couple. In vitro antioxidant activity assay demonstrates that the ligands and the two complexes 1 and 3 display high scavenging activity against hydroxyl (HO•) and superoxide (O2−•) radicals. Moreover, the fluorescence properties of the ligands and complexes 1–3 were studied in the solid state. Metal‐mediated enhancement is observed in 2, whereas metal‐mediated fluorescence quenching occurs with 1 and 3.
Trade‐off between energy consumption and ethylene recovery rate for quasi‐plant wide operation optimization of the ethylene column with bottom circulatory system in ethylene complex
Authors: Huang Dong , Zhao Xiao‐Ying , Luo Xiong‐Lin 
Published: June 2017

AbstractReducing energy consumption and increasing ethylene recovery rate can effectively optimize the operation of ethylene columns. This paper discusses the trade‐off between energy consumption and recovery rate in different scenes. For normal condition, the influences of energy consumption and recovery rate on economic benefits are represented as energy consumption of separation and energy consumption of circulation, while the unseparated ethylene is recycled by the bottom circulatory system. The operation optimization, whose objective is economic benefits, is achieved at the lowest total energy consumption, the sum of energy consumption of separation and circulation. For abnormal condition caused by furnace decoking, the objectives of operation optimization are economic benefits and operability. Operability, affected with remarkable production fluctuation, is quantified by variation of gas and liquid loads. Moreover, the Pareto curve of the multiobjective optimization problem was obtained with total energy consumption and variation of gas/liquid loads as objectives, and the inflection point achieves the equilibrium of economic benefits and operability. Therefore, the balance of recovery rate and energy consumption is crucial to improve economic benefits. Furthermore, moderately operating recovery rate and energy consumption is suitable to maximize economic benefits and operability simultaneously for production fluctuation. © 2017 Curtin University of Technology and John Wiley & Sons, Ltd.
Polyurethanes prepared from cyclocarbonated broccoli seed oil (PUcc): New biobased organic matrices for incorporation of phosphorescent metal nanocluster
Authors: Loulergue Patrick , Amela‐Cortes Maria , Cordier Stéphane , Molard Yann , Lemiègre Loïc , Audic Jean‐Luc 
Published: June 2017

ABSTRACTNew biobased polyurethanes were synthesized from cyclocarbonated broccoli seed oil and different di‐ or triamines. The isocyanate‐free route to synthesize these polyurethanes was divided into three steps: the broccoli seed oil was first epoxydized, then carbonated with CO2 at a pressure of 50 bar to convert oxiranes into cyclic carbonates, and finally polyurethanes were prepared through the reaction of the cyclocarbonated oil with three different di‐ or triamines, that is, butylene diamine, m‐xylene diamine, and bis(hexamethylene triamine). The chemical reactions were monitored by Fourier transform infrared spectroscopy, nuclear magnetic resonance, and electrospray ionisation mass spectrometry and mechanical properties of thus‐prepared polyurethanes were determined by dynamic mechanical analysis and tensile characterization. An UV‐responsive material was finally prepared from butylene diamine based polyurethane integrating phosphorescent molybdenum nanoclusters. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45339.
Use of short isobornyl methacrylate building blocks to improve the heat and oil resistance of thermoplastic elastomers via RAFT emulsion polymerization
Authors: Fu Xiaowei , Yuan Ye , Chen Xiaofeng , Xiao Yao , Wang Jiliang , Zhou Changlin , Lei Jingxin 
Published: June 2017

ABSTRACTTriblock copolymer (TCP)‐based thermoplastic elastomers (TPEs) were designed via reversible addition–fragmentation chain‐transfer emulsion polymerization. Short isobornyl methacrylate (IM) building blocks in the two ends of molecular chain were incorporated to guarantee the mechanical properties of the TPEs at high temperature (i.e., heat resistance) because of the high glass‐transition temperature (Tg) of poly(isobornyl methacrylate) (PIM; ∼180 °C). The microphase separation, tensile properties at different temperatures, dynamic mechanical properties, oil resistance, and thermal stability of the TPEs were extensively characterized. The TPEs had distinct microphase separation with a wide inter‐Tg interval (150–185 °C). The tensile strength and elongation at break of the TPEs decreased with increasing temperature from 25 to 100 °C because of the reduced interactions in the phase domain. Even so, the TPEs had a high elongation at break beyond 200% and little change in the tensile strength even at 100 °C together with a wide quasi‐platform stage between the Tg values in dynamic mechanical analysis; this indicated good heat resistance. Meanwhile, the TPEs had an enhanced oil resistance and a thermal stability higher than 300 °C. These TCP‐based TPEs with heat and oil resistance broaden the application potential in practical fields. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45379.
Fabrication and characterization of carbon nanofibers from polyacrylonitrile/pitch blends
Authors: Liu Chang , Lafdi Khalid 
Published: June 2017

ABSTRACTContinuous carbon nanofibers had been widely studied based on different processing methods and precursors. Especially, electrospinning was introduced as a versatile method for fabricating ultrathin fibers. However, as the limitation of precursor, pitch had not been well studied due to its viscosity and miscibility problem. A comprehensive study on the electrospinning of the blends [pitch and polyacrylonitrile (PAN)] was explored. Thermodynamic miscibility was studied by using differential scanning calorimeter. Fourier transfer infrared spectroscopy was used to show interaction and potential reaction between pitch and PAN molecules. Finally, smooth, continuous, and cylindrical carbon nanofibers were successfully fabricated by electrospinning technique. Based on Raman analysis result, the addition of pitch enhanced the carbon crystallite which improved the overall electrical conductivity and modulus of nanofibers. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45388.
Polyacrylonitrile‐based proton conducting membranes containing sulfonic acid and tetrazole moieties
Authors: Sangthumchai Thanakorn , Youngme Sujittra , Martwiset Surangkhana 
Published: June 2017

ABSTRACTProton conducting membranes based on polymers containing sulfonic acid and tetrazole moieties were developed. Successful syntheses of poly(acrylonitrile‐co‐styrene sulfonic acid) (PAN‐co‐PSSA), poly(acrylonitrile‐co‐5‐vinyl tetrazole) (PAN‐co‐PVTz), and poly(acrylonitrile‐co‐5‐vinyl tetrazole‐co‐styrene sulfonic acid) (PAN‐co‐PVTz‐co‐PSSA) were confirmed by 1H‐nuclear magnetic resonance spectroscopy, elemental analysis, and Fourier transform infrared spectroscopy. Two approaches were performed to study the effects of molar ratio of sulfonic acid to tetrazole and tetrazole content on membrane properties. In the first approach, PAN‐co‐PSSA was blended with PAN‐co‐PVTz at three molar ratios. The second approach focused on PAN‐co‐PVTz‐co‐PSSA membranes with various tetrazole contents. PAN‐co‐PSSA membrane was also prepared. All solution‐cast membranes were hydrolytically stable, except for PAN‐co‐PVTz‐co‐PSSA with 71% tetrazole. Surface morphologies of blend membranes were studied using scanning electron microscopy, and no phase separation was observed. Water uptake was shown to increase with increasing tetrazole. All membranes exhibited high thermal stability (up to 250 °C) and high storage moduli. Proton conductivity was found to depend significantly on relative humidity. The influences of sulfonic acid to tetrazole ratio and tetrazole content on proton conduction were observed and discussed. A maximum proton conductivity of 7.1 × 10−3 S/cm at 26 °C was obtained from PAN‐co‐PSSA membrane. In addition, all tested membranes showed relatively good oxidative stability after treatment in Fenton's reagent. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45411.
Anti‐PD‐1 antibodies in metastatic uveal melanoma: a treatment option?
Authors: Bender Carolin , Enk Alexander , Gutzmer Ralf , Hassel Jessica C. 
Published: June 2017

AbstractUveal melanomas (UMs) are a rare form of cancer with clinical and pathological characteristics distinct from cutaneous melanomas. Ipilimumab has shown efficacy and safety in the treatment of metastatic UM. This provides a rationale for treatment with other immune checkpoint inhibitors. This is a retrospective review of 15 patients with metastatic UM treated between June 2014 and February 2016, who received treatment with the anti‐PD‐1 Abs pembrolizumab or nivolumab. Patients were treated at two German university hospitals. Therapy was administered at the approved dosing schedules of 2 mg/kg q3w for pembrolizumab and 3 mg/kg q2w for nivolumab. Treatment was given until first tumor assessment and continued if tumor assessment showed disease control. Tumor assessments were performed at baseline and following scans every 12 weeks. Patients were monitored throughout for adverse events. Best response to treatment was stable disease in four patients. Eight out of 15 (53%) patients received treatment until first tumor assessment. As of February 2016, median progression‐free survival (PFS) is 3 months (range 0.75–6.75 months) and overall survival (OS) is 5 months (range 1–16 months). Eight out of 15 (53%) patients are still alive (two patients lost to follow‐up) with one out of four patients is in ongoing disease control. Patients with multiple organ metastases and elevated serum lactate dehydrogenase did not respond well to treatment. No objective response to PD‐1 Ab therapy was seen. Best response to treatment was stable disease in four patients. Treatment was well tolerated with manageable toxicity.
New Carbon Nanodots‐Silica Hybrid Photocatalyst for Highly Selective Solar Fuel Production from CO2
Authors: Yadav Rajesh K. , Kumar Abhishek , Park No‐Joong , Yadav Dolly , Baeg Jin‐Ook 
Published: June 2017

AbstractPhotocatalytic CO2 reduction for solar fuel production has attracted considerable attention as it can simultaneously reduce the effects of worldwide fossil‐fuel shortage and global warming. As a means to achieve this we herein report the facile and eco‐friendly synthesis of highly active carbon nanodots‐silica hybrid photocatalyst (CNDSH) by a reverse microemulsion method with a nonionic surfactant. The photocatalyst‐biocatalyst coupled system developed using CNDSH as photocatalyst functions efficiently to carry out high NADH regeneration (74.10±0.17 %) followed by its consumption in exclusive formic acid production (203.33±1.9 μmol) from CO2. This research work is a benchmark example of carbon nanodots‐silica hybrid photocatalyst system for solar fuel production and expected to trigger further interest in the development of efficient and eco‐friendly CO2 reduction systems.
PEGylation Greatly Enhances Laccase Polymerase Activity
Authors: Su Jing , Noro Jennifer , Loureiro Ana , Martins Madalena , Azoia Nuno G. , Fu Jiajia , Wang Qiang , Silva Carla , Cavaco‐Paulo Artur 
Published: June 2017

AbstractLaccase catalyzes the oxidation and polymerization of phenolic compounds in the presence of oxygen. Herein, we report for the first time that a previous PEGylation of laccase enhances the polymerase activity 3‐fold compared with the reaction of the native enzyme, as confirmed by UV/Vis spectroscopy. The polymerization of catechol increased only 1.5‐fold if poly(ethylene glycol) (PEG) was added to the medium reaction. Molecular‐dynamics simulations suggest the formation of a miscible complex of polycatechol and PEG, which is responsible to push the reaction forward. In a negative control experiment set, all catalysts were entrapped inside polyacrylamide gels and here the native laccase showed a relatively higher activity. These results suggest that the mobility of PEG is a key feature for the enhancement of the reaction.
Ternary NixCo3−xS4 with a Fine Hollow Nanostructure as a Robust Electrocatalyst for Hydrogen Evolution
Authors: Wang Min‐Qiang , Ye Cui , Bao Shu‐Juan , Chen Zhao‐Yang , Liu Heng , Xu Mao‐Wen 
Published: June 2017

AbstractThe elaborate design of efficient and stable electrocatalysts from earth‐abundant elements to replace precious Pt for the hydrogen evolution reaction (HER) is an ongoing challenge. Doping metallic compounds with additional metal atoms provides the opportunity to tune their electronic and crystal structures, which thus ameliorates their electrocatalytic properties. Herein, we report for the first time a robust and earth‐abundant Ni‐doped Co3S4 catalyst grown on carbon cloth that shows high HER activity in 1 m KOH. Morphology evolution and HER activity were found to be strongly related to the Ni substitution ratio. Electrochemical tests showed a low overpotential of 72.82 mV at 10 mA cm−2, a small Tafel slope of 49.44 mV dec−1, and long‐term durability over 46 h HER operation for the Ni0.5Co2.5S4 nanotube array self‐standing on carbon cloth. These data indicate that atomic modulation of Ni plays an important role in optimizing the morphology and electrocatalytic activity by greatly expanding the active sites in the electrocatalyst. Further, the 3 D self‐standing nanotube array highly aids in the exposure of active species and the transfer of electrons and charges, which substantially boosts the reaction kinetics and stability of the structure.
β‐Hydroxy‐tetrahydroquinolines from Quinolines Using Chloroborane: Synthesis of the Peptidomimetic FISLE‐412
Authors: Altiti Ahmad S. , Cheng Kai Fan , He Mingzhu , Al‐Abed Yousef 
Published: June 2017

AbstractA new synthetic protocol provides a simple and direct method to generate functionalized β‐hydroxy‐tetrahydroquinolines (THQs). Hydroboration of quinolines using chloroboranes followed by oxidation with NaBO3⋅H2O led to the formation of functionalized β‐hydroxy THQs. High regio‐ and diastereoselectivities were observed in α and γ substituted quinolines and the trans diastereomer of the β‐hydroxy‐THQ was the major isostere. This new protocol was utilized to build the novel antibody‐targeted lupus peptidomimetic, FISLE‐412.