bluuebunny/crossref_metadata_2025_split huggingface dataset:
Constitutional Recognition
Authors: Dodson Patrick 
Published: June 2018

AbstractThis paper reflects on the politics of recognition, past and present, and the power of politics to determine outcomes for Indigenous people. Significant milestones in nationwide recognition of Aboriginal people include the 1967 referendum and the 2008 apology to the “Stolen Generations” of Aboriginal people by then Prime Minister, Kevin Rudd. The author conveys the significance of these events in creating a spirit of hope and of making visible a people whose lack of recognition had made them invisible. The author argues that recognition must be based on truth, healing and justice and must be supported by meaningful recognition and involvement of Indigenous people in the creation of public policy that affects them directly. Ultimately concluding that constitutional recognition must send the message to Indigenous Australians that they are a valued, unique part of Australian society and acknowledge the Australian people want to deal with the division and discord of the past.
What Happens When You Tell Somebody Else's Story?
Authors: Wright Alexis 
Published: June 2018

AbstractWho writes about Aboriginal people, and what effect that has upon Aboriginal people and the national narrative about Aboriginal people are explored in this paper, which is comprised of key excerpts from an award‐winning longer essay I have written. While we are all collectively the inheritors and generators of the country's psyche and national narrative, the absence of recognition has effectively silenced Aboriginal people from contributing their own story to this narrative.
Unprecedented Acid‐Promoted Polymerization and Gelation of Acrylamide: A Serendipitous Discovery
Authors: Chan Siew Yin , Goh Shermin S. , Dou Qingqing , Chan Benjamin Qi Yu , Choo Wee Sim , Young David James , Loh Xian Jun 
Published: June 2018

AbstractDilute acid polymerizes degassed, aqueous acrylamide with concomitant gelation, without the need for added free radical initiator or cross‐linking agent. This reaction is accelerated by sonication or UV irradiation, but inhibited by adventitious oxygen or the addition of a free radical inhibitor, suggesting an acid‐accelerated free radical process. The resulting hydrogels are thixotropic in nature and partially disrupted by the addition of chaotropic agents, indicating the importance of hydrogen bonding to the 3D network. This discovery was made while trying to prepare pectin‐polyacrylamide hydrogels. We observed that pectin initiated the gelation of acrylamide, but only if the aqueous pectin samples had a pH lower than ca. 5.
Unexplained pancytopenia in acute myeloid leukemia treatment
Authors: Ezekwudo Daniel , Lupak Oleksandra , Vaddepally Raju , Gbadamosi Bolanle , Kuriakose Philip 
Published: June 2018

Key Clinical MessageCertain histopathological findings have been described in acute myeloid leukemia (AML) patients during treatment that define the hematologic outcomes. Such entities as bone marrow necrosis and hemophagocytic lymphohistiocytosis have been reported. These often result in severe pancytopenia.
Apexification in a mandibular first molar with a middle mesial canal
Authors: Quiñones Pedraza Jesús Alejandro , Flores Treviño Jorge Jaime , Cruz Fierro Norma , González Meléndez Rosalva , Elizondo Elizondo José , Zavala Vargas Larissa Argentina , De La Rosa Moreno Daniel Alberto 
Published: June 2018

Key Clinical MessageApexification procedures have been widely used to treat teeth with incomplete root development and pulp necrosis. The middle mesial canal (MMC) is an anatomical variation and in most cases represents a challenge during endodontic treatments. In this article, a favorable outcome is reported after apexification in a molar with MMC.
Emergency clamshell thoracotomy in blunt trauma resuscitation: Shelling the paradigm‐2 cases and review of the literature
Authors: Schober Patrick , de Leeuw Marcel A. , Terra Maartje , Loer Stephan A. , Schwarte Lothar A. 
Published: June 2018

Key Clinical MessageClamshell thoracotomy (CST) may be indicated and life‐saving in carefully selected cases of blunt trauma. As such, the current clinical stance of general contraindication of CST in blunt trauma should be reviewed and criteria developed to accommodate select cases, considering the diversity of injuries resulting from blunt trauma.
Efficient Photocatalytic Reduction of CO2 Using Carbon‐Doped Amorphous Titanium Oxide
Authors: Wang Peng , Yin Guoheng , Bi Qingyuan , Huang Xieyi , Du Xianlong , Zhao Wei , Huang Fuqiang 
Published: June 2018

AbstractCO2‐related solar to chemical conversions have gained extensive interest due to the great concerns on renewable energy utilization. Here, we have demonstrated a new synthetic route to C‐doped amorphous titanium oxide using a facile citric acid assisted sol‐gel method for efficient photocatalytic reduction of CO2. The synthesized amorphous material exhibits a mesoporous structure with high specific surface area and a significantly narrowed band gap of 2.1 eV, which are crucial for solar light harvesting and adsorption/chemical activation of CO2 for energy transformation. The amorphization, mesoporous structure, and the band structure of the C‐doped samples were also successfully tuned by controlling the annealing temperatures. The optimized catalyst annealed at 300 °C shows the highest specific surface area, favorable visible‐light response as well as the considerable performance for CO2 photoreduction. Moreover, the further treatment of Al reduction can induce numerous surface oxygen vacancies on the amorphous sample and thus efficiently restrain the recombination of photogenerated carriers. Of significant importance is that the Al‐reduced catalyst achieves excellent performance with the space‐time yield of CH4 and CO of 4.1 and 2.5 μmol g−1 h−1 for solar light, and 0.53 and 0.63 μmol g−1 h−1 for visible light, respectively. This sample is also stable for photocatalytic CO2 transformation.
An Acid Stable Metal‐Organic Framework as an Efficient and Recyclable Catalyst for the O−H Insertion Reaction of Carboxylic Acids
Authors: Wang Yingxia , Cui Hao , Zhang Li , Su Cheng‐Yong 
Published: June 2018

AbstractAlthough metal‐organic frameworks (MOFs) can be used in many reactions, their applications in acid involved reactions are limited due to their instability in acid environment. As a stable MOF, the Ir(III)‐porphyrin metal‐organic framework of the formula [(Hf6(μ3‐O)8(OH)2(H2O)10)2(Ir(TCPP)Cl)3]⋅solvents (Ir‐PMOF‐1(Hf)) can sustain its structure upon treatments in different pH (0–11) aqueous solutions. In this work, Ir‐PMOF‐1(Hf) has been examined in the O−H insertion reaction of carboxylic acids with diazo compounds. Catalytic results show that as low as 0.042 mol % of Ir‐PMOF‐1(Hf) can promote the acid O−H insertion with the maximum turn over number (TON) of 1381, and furthermore, it can be recycled and reused for 10 runs, suggesting that Ir‐PMOF‐1(Hf) is efficient for this acid involved reaction. Ir‐PMOF‐1(Hf) can also be miniaturized to nano scale (diameter range of 400–500 nm), and a large improvement with regards to TON (8400) can be observed in its catalysis.
Hydrogen Production from Pure Water via Piezoelectric‐assisted Visible‐light Photocatalysis of CdS Nanorod Arrays
Authors: Zhao Yan , Fang Zhi‐Bin , Feng Wenhui , Wang Kaiqiang , Huang Xueyan , Liu Ping 
Published: June 2018

AbstractVisible‐light‐driven H2 production from pure water is highly promising but unfortunately inefficient. Herein, for the first time, we report the realization of pure‐water‐splitting H2 production under visible‐light irradiation via single‐component CdS without any cocatalysts, employing a piezoelectric‐photocatalysis strategy. Wurtzite CdS nanorod arrays that combine piezoelectric and visible‐light photocatalytic properties was in‐situ assembled on FTO substrates to harvest both solar energy and ultrasonic vibration energy in water. The ultrasound‐induced piezoelectric field in CdS drives the separation of photo‐generated charge carriers, leading to more facile water‐splitting for H2 evolution than that under visible‐light irradiation alone. The CdS nanorod arrays achieves a high H2 production rate of 20 μL.h−1 under optimized coupling field, which is much higher than that of unsupported samples. This work demonstrates the capability of piezoelectric photocatalysts to simultaneously convert visible light energy and acoustic energy into hydrogen energy, which may break a new ground for the design of energy‐conversion materials towards harvesting discrete ambient energy in urban environment.
Dependence of Morphology, Dispersion and Hydrodesulfurization Performance of Active Phases in NiMo/SBA‐15 on Loading Method
Authors: Yuan Pei , Guo Yan , Li Xiaoling , Yue Yuanyuan , Zhu Haibo , Wang Tinghai , Bai Zhengshuai , Bao Xiaojun 
Published: June 2018

AbstractWith the aim of exploring the dependence of morphology, dispersion and hydrodesulfurization (HDS) activity of active phases over SBA‐15 on loading method, four NiMo/SBA‐15 catalysts have been prepared by two different Mo introduction strategies with varying MoO3 contents (13 and 19 wt.% in each approach, respectively). One of the approaches is the conventional incipient wetness impregnation (IM) and the other is a new‐proposed Mo‐based inorganic‐organic hybrid nanocrystals as the precursor with hydrothermal‐assisted (HA) loading method. The results show that metal species are severely aggregated at a high concentration by IM method, leading to the poorly distributed MoS2 slabs with large sizes and ultra‐high stacking layers. While in case of the HA approach, the organic molecules surrounding the Mo species can isolate Mo species effectively to prevent them from aggregation and greatly improve the dispersion of active phases, even at high MoO3 loadings. Therefore, the HDS activity is improved as increasing the amounts of MoO3 for the catalyst prepared with HA method because of the more active sites accessible to the reactants, however, HDS activity is decreased for the catalyst acquired by the IM method due to the serious metal aggregation. It is demonstrated that the HA method is favorable for the better dispersion of active phases over SBA‐15 with the help of organic molecules leading to the effective MoS2 morphology with remarkably enhanced catalytic activity, and such superiority of the HA approach is more prominent at high MoO3 loadings.
Improved Cyclohexane Oxidation Catalyzed by a Heterogenized Iron (II) Complex on Hierarchical Y Zeolite through Surfactant Mediated Technology
Authors: Van‐Dúnem Vanmira , Carvalho Ana P. , Martins Luísa M. D. R. S. , Martins Angela 
Published: June 2018

AbstractThe hydrotris (pyrazol‐1‐yl) methane iron (II) complex [FeCl2(Tpm)] [Tpm=HC(C3N2H3)3] was successfully immobilized, by the incipient wetness impregnation method, in parent and hierarchical Y zeolite modified through surfactant mediated methodology using different bases (NH4OH, NaOH or TPAOH). The catalytic performance and recyclability of supported Fe complex was evaluated in the oxidation of cyclohexane with hydrogen peroxide to cyclohexanol and cyclohexanone under mild conditions and two distinct behaviors were observed: using commercial Y and modified Y with NaOH the complex is anchored mainly at the outer surface of the zeolite supports, resulting in high lixiviation after the first catalytic cycle. When NH4OH and TPAOH are used during the zeolite treatments the particular textural parameters exhibited by these two supports are able to effectively retain the complex molecules, resulting in a high recyclability observed after three consecutive cycles, especially when NH4OH treated zeolite was used as support.
[Mo3S13]2− Cluster Decorated Sulfur‐doped Reduced Graphene Oxide as Noble Metal‐Free Catalyst for Hydrogen Evolution Reaction in Polymer Electrolyte Membrane Electrolyzers
Authors: Pham Chuyen V. , Zana Alessandro , Arenz Matthias , Thiele Simon 
Published: June 2018

AbstractNon‐noble metal catalysts represent a central direction of seminal scientific research in electrocatalysis due to the high cost and scarcity of present Pt‐based catalysts for the hydrogen evolution reaction (HER) in particular. Here, we develop a novel hybrid material of [Mo3S13]2− clusters decorated sulfur doped reduced graphene oxide (Mo3S13‐SrGO) as a HER catalyst for water electrolyzers. Doped S elements act as anchor points for [Mo3S13]2− cluster attachment via forming doped S−Mo coordinate bonds, which increase stability of the hybrid catalyst as well as contribute additional active sites for the HER. SrGO supports substantially enhance the activity of the hybrid catalyst, maintaining high catalyst utilization at high loading. In standard electrochemical tests, the Mo3S13‐SrGO catalyst exhibits a Tafel slope of about 40 mV per decade and a current density of 10 mA cm−2 at 174 mV overpotential, which are significantly better than those exhibited by unsupported [Mo3S13]2− clusters with a Tafel slope of 53 mV per decade and an overpotential of 244 mV at 10 mA cm−2. Further, the hybrid catalyst exhibits a good working stability in acidic media. In the form of nanostructured powder, Mo3S13‐SrGO can be readily processed into porous electrodes for practical applications using standard manufacturing technologies.
To Anion–π or not to Anion–π: The Case of Anion‐Binding to Divalent Fluorinated Pyridines in the Gas Phase
Authors: Göth Melanie , Witte Felix , Quennet Marcel , Jungk Phillip , Podolan Gabriel , Lentz Dieter , Hoffmann Waldemar , Pagel Kevin , Reissig Hans‐Ulrich , Paulus Beate , Schalley Christoph A. 
Published: June 2018

AbstractA series of mono‐ and divalent fluorinated pyridine derivatives is investigated by electrospray ionization (tandem) mass spectrometry and quantum chemical calculations with respect to their capability to bind anions in the gas phase. The pyridine derivatives differ not only in valency, but also with regard to the degree of fluorination of the pyridine rings, the positions of the fluorine atoms, the rigidity of the spacers connecting the two pyridines in the divalent compounds, and the relative configuration. While the monovalent compounds did not form anion complexes, the divalent analogues exhibit anion binding even to weakly coordinating anions such as tetrafluoroborate. Three different tandem mass spectrometric experiments were applied to rank the gas‐phase binding energies: (i) collision‐induced dissociation (CID) experiments in a Fourier transform ion‐cyclotron‐resonance (FTICR) mass spectrometer on two different, simultaneously mass‐selected complexes with different receptors, (ii) determination of the collision energy required to fragment 50 % of the mass‐selected complexes in an ESI‐QToF mass spectrometer, and (iii) CID of heterodimers formed from two different, competing pyridine receptors and indigo carmine, a dianion with two identical binding sites. All three experiments result in consistent binding energy ranking. This ranking reveals surprising features, which are not in agreement with binding through anion–π interactions. Density functional theory (DFT) calculations comparing different potential binding modes provide evidence that the ranking can instead nicely be explained, when C−H⋅⋅⋅anion interactions with the spacers are invoked. These results are supported by gas‐phase IR spectroscopy and ion mobility‐mass spectrometry (IM‐MS) on a selected set of chloride pyridine complexes.
Donor‐Site‐Directed Rational Assembly of Heteroleptic cis‐[Pd2L2L′2] Coordination Cages from Picolyl Ligands
Authors: Zhu Rongmei , Bloch Witold M. , Holstein Julian J. , Mandal Soham , Schäfer Lars V. , Clever Guido H. 
Published: June 2018

AbstractA donor‐site engineering approach facilitates the formation of heteroleptic [Pd2L2L′2]4+ cage structures through a favored cis‐′in2/out2′ spatial configuration of the methyl groups of 5‐ and 3‐substituted bis‐monodentate picolyl ligands with flat acridone and bent phenothiazine backbones. The heteroleptic cages were confirmed by ESI‐MS and 2D NMR experiments as well as DFT calculations, which pointed toward a cis‐configuration being energetically favored. This was further supported by the synthesis and X‐ray structure of a previously unreported cis‐[Pd(2‐picoline)4]2+ complex. The formation of homoleptic structures, however, was met with considerable steric hindrance at the PdII centers, as observed by the formation of [Pd2L3(solvent)2]4+ and [Pd2L2(solvent)4]4+ species when only one type of acridone‐based ligand was offered. In contrast, bent phenothiazine ligands with outside‐pointing methyl groups showed the ability to form interpenetrated double‐cages, as revealed by X‐ray crystallography. The general route presented herein enables the assembly of uniform cis‐[Pd2L2L′2]4+ coordination cages, thus furthering the possibility to increase structural and functional complexity in supramolecular systems.
Synthesis of Colloidal Metal Nanocrystals: A Comprehensive Review on the Reductants
Authors: Rodrigues Thenner S. , Zhao Ming , Yang Tung‐Han , Gilroy Kyle D. , da Silva Anderson G. M. , Camargo Pedro H. C. , Xia Younan 
Published: June 2018

AbstractThere is a growing interest in controlling the synthesis of colloidal metal nanocrystals and thus tailoring their properties toward various applications. In this context, choosing an appropriate combination of reagents (e.g., salt precursor, reductant, capping agent, and stabilizer) plays a pivotal role in enabling the synthesis of metal nanocrystals with diversified sizes, shapes, and structures. Here we present a comprehensive review that highlights one of the key reagents for the synthesis of metal nanocrystals via chemical reduction: the reductants. We start with a brief introduction to the compounds commonly employed as reductants in the colloidal synthesis of metal nanocrystals by showing their oxidation half‐reactions and the corresponding oxidation potentials. Then we offer specific examples pertaining to the controlled synthesis of metal nanocrystals, followed by some fundamental aspects covering the general mechanisms of metal ion reduction based on the Marcus Theory. Afterwards, we present a case‐by‐case discussion on a wide variety of reductants, including their major properties, reduction mechanisms, and additional effects on the final products. We illustrate these aspects by selecting key examples from the literature and paying close attention to the underlying mechanism in each case. At the end, we conclude by summarizing the highlights of the review and providing some perspectives on future directions.
Monitoring the Effect of Different Metal Centers in Metal–Organic Frameworks and Their Adsorption of Aromatic Molecules using Experimental and Simulation Studies
Authors: Lirio Stephen , Shih Yung‐Han , Hsiao Shu‐Ying , Chen Jian‐Hong , Chen Hsin‐Tsung , Liu Wan‐Ling , Lin Chia‐Her , Huang Hsi‐Ya 
Published: June 2018

AbstractIn this study, the adsorption behavior of different metal centers in analogous M‐1,4‐NDC frameworks (1,4‐NDC=1,4‐naphthalenedicarboxylate) towards guest molecules through simulation studies and experimental studies is reported. Simulation studies showed that the adsorption behavior of analogous M‐1,4‐NDC is affected by the atomic radius of the metal center, which was found to be in agreement with the experimental studies.
N‐Heterocycle‐Fused Pentalenes by a Gold‐Catalyzed Annulation of Diethynyl‐Quinoxalines and ‐Phenazines
Authors: Sekine Kohei , Stuck Fabian , Schulmeister Jürgen , Wurm Thomas , Zetschok Dominik , Rominger Frank , Rudolph Matthias , Hashmi A. Stephen K. 
Published: June 2018

AbstractThe gold‐catalyzed annulation of diethynyl N‐heterocycles for the synthesis of quinoxaline‐/phenazine‐based pentalenes and the study of their optoelectronic properties are described. The inhibition of the gold catalyst by the nitrogen centers in the substrate and the product could be overcome by increasing the reaction temperature to 130 °C, which usually leads to catalyst decomposition in gold catalysis. At 130 °C, 6,7‐di(arylethynyl)quinoxalines in chlorobenzene give the corresponding pentalenes. The annulation of 2,3‐di(arylethynyl)quinoxalines requires an even higher temperature under microwave irradiation. The quinoxaline‐based pentalenes showed lower LUMO levels compared to the corresponding naphthalene‐based pentalenes.
Modelling of cross‐flow microfiltration coupled with bentonite treatment in sugar beet molasses purification
Authors: Djordjević Miljana , Šereš Zita , Došenović Tatjana , Šoronja‐Simović Dragana , Maravić Nikola , Šaranović Žana , Šereš Laslo , Šćiban Marina , Djordjević Marijana 
Published: June 2018

AbstractThe removal of colourants and other non‐sucrose compounds from sugar beet molasses opens the possibility for more acceptable and effective recovery of sucrose, which is the most valuable sugar industry product. In the presented study, the feasibility of the sugar beet molasses purification process, which combines sodium bentonite pre‐treatment and microfiltration with an embedded static mixer, was examined. Molasses pre‐treatment with sodium bentonite consisted of a bentonite suspension addition (7 g/L) under the following conditions: pH 5, temperature 50 °C, and contact time 30 min. Sugar beet molasses separation from bentonite was performed by cross‐flow microfiltration using a 200 nm TiO2 ceramic tubular membrane with static mixer absence or presence and variation in the sugar beet molasses flow rate and dry substance. The molasses purification process efficiency was validated through the permeate flux values as well as colour and turbidity measurements. Higher molasses colour (20–60 %) and turbidity reduction (83.4–99.2 %) was achieved in the experiments with static mixer absence, while static mixer introduction greatly increased the final and especially steady‐state permeate flux.
Study of fluid dynamic conditions in the selected static mixers part III—research of mixture homogeneity
Authors: Stec Magdalena , Synowiec Piotr Maria 
Published: June 2018

AbstractThis paper contains the analysis of mixture homogeneity in two types of static mixers, Koflo and Kenics, based on both experimental and CFD study. The research was also expanded to the recognition of the pipe that was used as a background. The scope of work includes the analysis of the CoV coefficients (as a measure of mixing degree) obtained for the mentioned devices and their comparison. The research showing the impact of such parameters, i.e., pressure drop or L/d ratio on the mentioned mixture homogeneity was also presented. What is more, the axial dispersion model was introduced to describe the devices as non‐ideal reactors. According to this, new relations for the CoV predictions (taking into consideration the turbulence intensity, the deviations from well‐known ideal states, and the mixing elements’ shape) were developed. As a result, it was proven that static mixers are highly efficient devices because the obtained CoVs were at around 2 % in the laminar flow and even less than that in the turbulent regime. When the pipe was used, the satisfactory value of the CoV was obtained when the Reynolds number was increased to 2600.