bluuebunny/crossref_metadata_2025_split huggingface dataset:
Springtime extreme moisture transport into the Arctic and its impact on sea ice concentration
Authors: Yang Wenchang , Magnusdottir Gudrun 
Published: May 2017

AbstractRecent studies suggest that springtime moisture transport into the Arctic can initiate sea ice melt that extends to a large area in the following summer and fall, which can help explain Arctic sea ice interannual variability. Yet the impact from an individual moisture transport event, especially the extreme ones, is unclear on synoptic to intraseasonal time scales and this is the focus of the current study. Springtime extreme moisture transport into the Arctic from a daily data set is found to be dominant over Atlantic longitudes. Lag composite analysis shows that these extreme events are accompanied by a substantial sea ice concentration reduction over the Greenland‐Barents‐Kara Seas that lasts around a week. Surface air temperature also becomes anomalously high over these seas and cold to the west of Greenland as well as over the interior Eurasian continent. The blocking weather regime over the North Atlantic is mainly responsible for the extreme moisture transport, occupying more than 60% of the total extreme days, while the negative North Atlantic Oscillation regime is hardly observed at all during the extreme transport days. These extreme moisture transport events appear to be preceded by eastward propagating large‐scale tropical convective forcing by as long as 2 weeks but with great uncertainty due to lack of statistical significance.
AAPMmedical physics practice guideline 6.a.: Performance characteristics of radiation dose index monitoring systems
Authors: Gress Dustin A. , Dickinson Renee L. , Erwin William D. , Jordan David W. , Kobistek Robert J. , Stevens Donna M. , Supanich Mark P. , Wang Jia , Fairobent Lynne A. 
Published: May 2017

The American Association of Physicists in Medicine (AAPM) is a nonprofit professional society whose primary purposes are to advance the science, education and professional practice of medical physics. TheAAPMhas more than 8,000 members and is the principal organization of medical physicists in the United States.TheAAPMwill periodically define new practice guidelines for medical physics practice to help advance the science of medical physics and to improve the quality of service to patients throughout the United States. Existing medical physics practice guidelines will be reviewed for the purpose of revision or renewal, as appropriate, on their fifth anniversary or sooner.Each medical physics practice guideline represents a policy statement by theAAPM, has undergone a thorough consensus process in which it has been subjected to extensive review, and requires the approval of the Professional Council. The medical physics practice guidelines recognize that the safe and effective use of diagnostic and therapeutic radiology requires specific training, skills, and techniques, as described in each document. Reproduction or modification of the published practice guidelines and technical standards by those entities not providing these services is not authorized.The following terms are used in the AAPM practice guidelines:•Must and Must Not: Used to indicate that adherence to the recommendation is considered necessary to conform to this practice guideline.•Should and Should Not: Used to indicate a prudent practice to which exceptions may occasionally be made in appropriate circumstances.
Robust input‐output finite‐time filtering for uncertain Markovian jump nonlinear systems with partially known transition probabilities
Authors: Ren Hangli , Zong Guangdeng 
Published: May 2017

SummaryIn this paper, the robust input‐output finite‐time filtering problem is addressed for a class of uncertain Markovian jump nonlinear systems with partially known transition probabilities. Here, the disturbances, uncertainties, state delay, and distributed delays are all taken into account. Both the stochastic finite‐time boundedness and the stochastic input‐output finite‐time stability are introduced to the Markovian jump nonlinear systems with partially known transition probabilities. By constructing a reasonable stochastic Lyapunov functional and using linear matrix inequality techniques, sufficient conditions are established to guarantee the filtering error systems are stochastic finite‐time bounded and stochastic input‐output finite‐time stable, respectively. Finally, 2 examples are provided to illustrate the effectiveness of the proposed methods.
Asymmetric [4+1] Cycloadditions of N‐Thioacylimines and Sulfur Ylides
Authors: Li Chao , Jiang Kun , Liu Tian‐Yu , Chen Ying‐Chun 
Published: May 2017

AbstractAn asymmetric [4+1] cycloaddition reaction of N‐thioacylimines, generated in situ from α‐amido sulfones, and sulfur ylides bearing a d‐camphor scaffold, is reported. The enantiocontrol was significantly improved by adding catalytic amounts of (R)‐1,1′‐bi(2‐naphthol), furnishing a spectrum of 2‐alkylthio‐4,5‐dihydrothiazoles in modest to high yields with moderate to excellent stereoselectivity (>19:1 dr, up to 98% ee).magnified image
An Initial Review of the Status of Electrode Materials for Potassium‐Ion Batteries
Authors: Pramudita James C. , Sehrawat Divya , Goonetilleke Damian , Sharma Neeraj 
Published: May 2017

AbstractThe status of room‐temperature potassium‐ion batteries is reviewed in light of recent concerns regarding the rising cost of lithium and the fact that room‐temperature sodium‐ion batteries have yet to be commercialised thus far. Initial reports of potassium‐ion cells appear promising given the infancy of the research area. This review presents not only an overview of the current potassium‐ion battery literature, but also attempts to provide context by describing previous developments in lithium‐ion and sodium‐ion batteries and the electrochemical reaction mechanisms discovered thus far. Perspectives and directions on the techniques available to characterize newly developed battery materials are also provided based on our experience and knowledge from the literature. It is hoped that through this review, the potential of potassium‐ion batteries as a competitive energy‐storage technology will be realised, and the accessibility and available knowledge of the techniques required to develop the technology will be made apparent.
KTi2(PO4)3 with Large Ion Diffusion Channel for High‐Efficiency Sodium Storage
Authors: Sheng Jinzhi , Peng Chen , Xu Yanan , Lyu Haoying , Xu Xu , An Qinyou , Mai Liqiang 
Published: May 2017

To accommodate the decreasing lithium resource and ensure continuous development of energy storage industry, sodium‐based batteries are widely studied to inherit the next generation of energy storage devices. In this work, a novel Na super ionic conductor type KTi2(PO4)3/carbon nanocomposite is designed and fabricated as sodium storage electrode materials, which exhibits considerable reversible capacity (104 mAh g−1 under the rate of 1 C with flat voltage plateaus at ≈2.1 V), high‐rate cycling stability (74.2% capacity retention after 5000 cycles at 20 C), and ultrahigh rate capability (76 mAh g−1 at 100 C) in sodium ion batteries. Besides, the maximum ability for sodium storage is deeply excavated by further investigations about different voltage windows in half and full sodium ion cells. Meanwhile, as cathode material in sodium‐magnesium hybrid batteries, the KTi2(PO4)3/carbon nanocomposite also displays good electrochemical performances (63 mAh g−1 at the 230th cycle under the voltage window of 1.0–1.9 V). The results demonstrate that the KTi2(PO4)3/carbon nanocomposite is a promising electrode material for sodium ion storage, and lay theoretical foundations for the development of new type of batteries.
Variation of para Substituent on 2‐Phenol of Tetraaryl‐Substituted Imidazole‐Boron Difluoride Complexes: Synthesis, Characterization, and Photophysical Properties
Authors: Mukundam Vanga , Dhanunjayarao Kunchala , Samal Sanket , Venkatasubbaiah Krishnan 
Published: May 2017

AbstractFive N,O‐chelated boron complexes (i.e., 3 a–3 e) were prepared by treating imidazole precursors with BF3⋅Et2O. These imidazole derivatives were prepared from an arylboronic acid and 4‐bromo‐2‐(1,4,5‐triphenyl‐1H‐imidazol‐2‐yl)phenol. X‐ray diffraction analysis of 3 a–3 c and 3 e revealed that the phenyl rings bonded to the imidazole are severely twisted, but the interplanar angle of the biphenyl group is approximately 24°. The complexes were characterized by UV/vis and fluorescence spectroscopy, cyclic voltammetry, and theoretical calculations. The complexes exhibited moderate quantum yields when excited at the absorption maximum, and their fluorescence and UV/vis absorption spectra show large Stokes shifts relative to those of boron‐dipyrromethene compounds. Notably, two emission bands were observed for 3 a–3 d in the solid state. Powder XRD analysis and solid‐state emission studies of as‐prepared, ground, and fumed samples were used to reveal the origin of this dual emission.
Nickel‐catalyzed oxidative esterification of formamides with 1,3‐dicarbonyl compounds under mild reaction conditions
Authors: Saberi Dariush , Poorsadeghi Samira 
Published: May 2017

Synthesis of enol carbamates was achieved via nickel‐catalyzed oxidative coupling of formamides with 1,3‐dicarbonyl compounds in the presence of tert‐butyl hydroperoxide at 40 °C. Various derivatives of enol carbamates were synthesized by this method in good to excellent yields.
Multifunctional Free‐Standing Gel Polymer Electrolyte with Carbon Nanofiber Interlayers for High‐Performance Lithium–Sulfur Batteries
Authors: Choi Sinho , Song Jianjun , Wang Chengyin , Park Soojin , Wang Guoxiu 
Published: May 2017

AbstractFree‐standing trimethylolpropane ethoxylate triacrylate gel polymer electrolyte is synthesized by a chemical cross‐linking process and used as an electrolyte and separator membrane in lithium‐sulfur batteries. The cross linked gel polymer electrolyte also exhibited a stable geometric size retention of 95 % at the high temperature of 130 °C. The as‐prepared gel polymer electrolyte membrane with carbon nanofibers interlayer can effectively prevent polysulfide dissolution and shuttle effect, leading to significantly enhanced electrochemical properties, including high capacity and cycling stability, with an enhanced specific capacity of 790 mA h g−1 after 100 cycles.
Brandschutzbemessung aussteifender Stahlrahmen
Authors: Hollmann Dirk 
Published: May 2017

AbstractGemäß Eurocode DIN EN 1993‐1‐2 erfolgt die Brandschutzbemessung von Stahlkonstruktionen allgemein am Einzelbauteil, an einem Teiltragwerk oder am Gesamttragwerk. Die Norm erlaubt den Nachweis des Feuerwiderstands bei Normbrandeinwirkung gemäß Einheitstemperaturzeitkurve am Bauteil. Diese Vorgehensweise ist bei den Standardfällen von Balken und Stützen in ausreichend ausgesteiften Gesamtsystemen zweifelsohne nachvollziehbar. Es stellt sich jedoch die Frage, inwiefern ein Nachweis am (Einzel‐)Bauteil auch für Stahlrahmen mit aussteifender Wirkung auf sicherer Seite liegt. Im Beitrag wird dieser Frage nachgegangen und ein Rahmensystem mit angehängten Pendelstützen untersucht. Die thermische Analyse für die Einzelbauteile mit Brandschutzbekleidungen wird auf Basis der thermischen Materialparameter des nationalen Anhangs DIN EN 1993‐1‐2/NA durchgeführt. Für die thermische Analyse des Teiltragwerks mit der Methode der finiten Elemente werden diese vereinfachten Materialparameter überprüft und leicht modifiziert. Die Einflüsse der Nachgiebigkeit geschraubter Rahmenecken sowie der thermischen Dehnungen im Rahmenriegel werden diskutiert.
Schwel‐ und Brandverhalten von Wärmedämmverbundsystemen aus Holzfaserdämmplatten
Authors: Steeger Felix , Küppers Judith , Brunkhorst Sven 
Published: May 2017

AbstractDie deutsche Musterbauordnung fordert in Bezug auf Außenwandbekleidungen für die Gebäudeklassen 4 und 5, dass diese einschließlich der Dämmstoffe schwer entflammbar sein müssen. Derzeitig auf dem Markt verfügbare Dämmstoffe aus nachwachsenden Rohstoffen sind überwiegend als normal entflammbar klassifiziert. Ihr Brandverhalten kann durch die Verwendung von Flammschutzmitteln zwar verbessert werden, allerdings bestehen aufgrund der weiterhin vorhandenen Schwel‐ bzw. Glimmneigung bauordnungsrechtlich große Hürden. Im Rahmen eines Forschungsprojekts wird das Schwel‐ bzw. Glimmverhalten von Holzfaserdämmplatten zur Verwendung in Wärmedämmverbundsystemen (WDVS) untersucht. Das übergeordnete Ziel dieses Projekts ist die Entwicklung eines Gesamtsystems, das die brandschutztechnischen Anforderungen an Fassaden für die Gebäudeklassen 4 und 5 erfüllt. Dafür wurden die Bedingungen zur Auslösung von Schwel‐ bzw. Glimmprozessen sowie der Verlauf dieser Zersetzungsprozesse in Abhängigkeit von den Materialparametern des Holzfaserdämmstoffs und unter der Verwendung von Flammschutzmitteln untersucht. Die brandschutztechnischen Schutzziele konnten dabei nicht allein durch Optimierungen der Materialeigenschaften erreicht werden. Parallel wurden verschiedene Putzsystemvarianten auf ihre thermische Schutzwirkung hin untersucht, mit dem Ziel, die Entstehung von Schwelprozessen im WDVS zu verhindern. Ein weiterer Untersuchungsschwerpunkt war die Begrenzung bereits ausgelöster, kontinuierlich fortlaufender Schwelprozesse im WDVS durch bauliche Maßnahmen. In einem ersten Versuch am Fassadenprüfstand, mit einem großzügig dimensionierten Putzsystem, konnte das Auslösen von Schwelprozessen verhindert werden. Im Rahmen des laufenden Forschungsvorhabens sind weitere Versuche am Fassadenprüfstand, Schutzziel‐ und Risikobetrachtungen sowie ergänzende Untersuchungen zum Löschverhalten von Holzfaserdämmplatten und zu konstruktiven Details des WDVS vorgesehen.
Bone morphogenetic protein‐5, a key molecule that mediates differentiation in MC3T3E1 osteoblast cell line
Authors: Vijayan Viji , Gupta Sakshi , Gupta Sarika 
Published: May 2017

AbstractBone morphogenetic protein‐5 (BMP‐5) is a member of the TGF receptor‐β family with osteoinductive property. However, its physiological role in osteoblast differentiation is not defined. This study highlights the importance of BMP‐5 in MC3T3E1 osteoblast differentiation. Pre‐osteoblasts exposed to osteogenic media (ascorbic acid, 50 µg/ml and β‐glycerophosphate, 10 mM) showed high protein expression of BMP‐5 in cell lysates and cell culture supernatants, which peaked during early time‐points of differentiation and declined with onset of mineralization. Attenuation of endogenous BMP‐5 protein expression by RNA interference downregulated the expression of type I collagen (COLIA1), an early osteoblast differentiation marker but not osteocalcin, a late osteoblast differentiation marker. Further experiments to analyze the cell signaling components revealed that BMP‐5 modulates COLIA1 expression via p38‐Runx2 axis involving Runx2 (Ser19) phosphorylation. These effects were also observed when recombinant BMP‐5 was added to pre‐osteoblast cultures reinforcing the fact that BMP‐5 is a modulator of COLIA1 expression. We conclude that BMP‐5 has stage‐specific role to play during MC3T3E1 osteoblast differentiation in part by autocrine p38/Runx2/COLIA1 signaling. © 2017 BioFactors, 43(4):558–566, 2017
Filament‐based realistic turbulent wake synthesis
Authors: Liao Xiangyun , Si Weixin , Xu Biao , Yuan Zhiyong , Wang Qiong , Heng Pheng‐Ann 
Published: May 2017

AbstractTurbulent wake is crucial for the visually appealing effects of liquid. Unfortunately, it is challenging to realistically simulate this phenomenon with ring‐shaped vortical structures. To tackle this issue, we propose a filament‐based turbulent wake synthesis method for realistically simulating the turbulent wake with ring‐shaped vortical structures. The filaments are sampled at the separation points on the obstacle surface and emitted into the liquid flow to generate structured turbulent wake. Besides, the surface tension model is incorporated to generate natural turbulent wake diffusion visual effects in liquid by the anticurvature effects. The proposed approach can realistically and effectively synthesize the turbulent wake with ring‐shaped vortical structures and make it diffuse naturally. The experimental results demonstrate that our method outperforms than the vortex particle‐based method in synthesizing appealing turbulent wake.
Design, Synthesis, and Biological Evaluation of Peptidomimetic N‐Substituted Cbz‐4‐Hyp‐Hpa‐Amides as Novel Inhibitors of Plasmodium falciparum
Authors: Bacherikov Valeriy A. , Chittiboyina Amar G. , Avery Mitchell A. 
Published: May 2017

A new series of peptidomimetic N‐substituted Cbz‐4‐Hyp‐Hpa‐amides were designed, synthesized, and evaluated for inhibition of the Plasmodium falciparum. Substituents on the N‐atom of the amide group were selected alkyl‐, allyl‐, aryl‐, 2‐hydroxyethyl‐, 2‐cyanoethyl‐, cyanomethyl‐, 2‐hydroxyethyl‐, 2,2‐diethoxyethyl‐, or 2‐ethoxy‐2‐oxoethylamino groups, and about of 40 new compounds were synthesized and evaluated for antiplasmodial activity in vitro. Antimalarial activity has been investigated as for the final peptide mimetics, and their immediate predecessors, carrying TBDMS or TBDPS protecting groups on 4‐hydroxyproline residue and 18 derivatives exhibited toxicity against P. falciparum. Of these agents, compound 23e was shown to have potent antimalarial activity with IC50 528 ng/ml.
Myocardial ischemia induced by major aortopulmonary collateral arteries treated with transcatheter coil embolization
Authors: Kakizaki Ryota , Tojo Taiki , Minami Yoshiyasu , Koitabashi Toshimi , Woodhams Reiko , Shimohama Takao , Ishii Masahiro , Ako Junya 
Published: May 2017

Key Clinical MessageMajor aortopulmonary collateral arteries branching from coronary arteries may cause coronary steal. The careful follow‐up is needed irrespective of symptoms because increasing physical activities and oxygen demand along with the age may induce myocardial ischemia. Transcatheter intervention by well‐trained physician would be a treatment option in patients with myocardial ischemia.
Sustainability and Nanomaterials in Concert
Authors: Melchionna Michele , Fornasiero Paolo 
Published: May 2017

AbstractSustainable energy and the environment are one of the central priorities for our society, triggering a massive capital investment on research to define new trajectories for bypassing fossil fuel dependence and move to clean energy and consequent pollution abatement. The last decade has witnessed the rise and establishment of nanomaterials as frontrunners for a real societal impact of key processes under investigation, such as sustainable hydrogen production and CO2 conversion to fuels. The enormous progress achieved has been made possible by the opportunity to better understand materials at the nanoscale through the use of more powerful characterization techniques and advanced synthetic strategies. The lesson learned is that appropriately engineered multicomponent nanomaterials may hold the key to the routine industrial establishment of new greener concepts of energy production, with strong repercussions to the quality of life.
Edge‐hydroxylated Boron Nitride for Oxidative Dehydrogenation of Propane to Propylene
Authors: Shi Lei , Wang Dongqi , Song Wei , Shao Dan , Zhang Wei‐Ping , Lu An‐Hui 
Published: May 2017

AbstractThe front cover artwork for Issue 10/2017 is provided by the Advanced Energy Materials and Catalysis Research Group, Dalian University of Technology and the Institute of High Energy Physics, Chinese Academy of Sciences. The image shows that a metal‐free catalyst, edge hydroxylated boron nitride, can efficiently catalyze the oxidative dehydrogenation of propane to propylene with superior selectivity and negligible CO2 emission. See the Full Paper itself at https://doi.org/10.1002/cctc.201700004.
Recent Advances in Synthetic α‐Glucosidase Inhibitors
Authors: Liu Zhiyang , Ma Shutao 
Published: May 2017

AbstractOver the past few years, the number of people diagnosed with type 2 diabetes has increased owing to an unhealthy diet, a limited amount of exercise, and obesity. The search for novel and efficient antidiabetes agents has become an urgent task for scientists. Among the antidiabetes drugs, α‐glucosidase inhibitor drugs have been proven to have many advantages over other drugs, and therefore, a large number of new compounds as α‐glucosidase inhibitors has recently been reported. In this review, we summarize these newly found α‐glucosidase inhibitors and their structure–activity relationships in antidiabetic studies and provide better structures for α‐glucosidase inhibitors or even preclinical candidates. Beyond that, some enlightening strategies for the synthesis of relevant compounds are highlighted.
Additional cytogenetic abnormalities and variant t(9;22) at the diagnosis of childhood chronic myeloid leukemia: The experience of the International Registry for Chronic Myeloid Leukemia in Children and Adolescents
Authors: Millot Frédéric , Dupraz Christelle , Guilhot Joelle , Suttorp Meinolf , Brizard Françoise , Leblanc Thierry , Güneş Adalet Meral , Sedlacek Petr , De Bont Evelyne , Li Chi Kong , Kalwak Krzysztof , Lausen Birgitte , Culic Srdjana , Dworzak Michael , Kaiserova Emilia , De Moerloose Barbara , Roula Farah , Biondi Andrea , Baruchel André , Guilhot François 
Published: May 2017

BACKGROUNDIn the adult population with newly diagnosed chronic myeloid leukemia (CML), variant translocations are usually not considered to be impairing the prognosis, whereas some additional cytogenetic abnormalities (ACAs) are associated with a negative impact on survival. Because of the rarity of CML in the pediatric population, such abnormalities have not been investigated in a large group of children with CML.METHODSThe prognostic relevance of variant t(9;22) and ACAs at diagnosis was assessed in 301 children with CML in the chronic phase who were enrolled in the International Registry for Chronic Myeloid Leukemia in Children and Adolescents.RESULTSOverall, 19 children (6.3%) presented with additional cytogenetic findings at diagnosis: 5 children (1.7%) had a variant t(9;22) translocation, 13 children (4.3%) had ACAs, and 1 had both. At 3 years, for children with a classic translocation, children with ACAs, and children with a variant t(9;22) translocation who were treated with imatinib as frontline therapy, the probability of progression‐free survival (PFS) was 95% (95% confidence interval [CI], 91%‐97%), 100%, and 75% (95% CI, 13%‐96%), respectively, and the probability of overall survival (OS) was 98% (95% CI, 95%‐100%), 100% (95% CI, 43%‐98%), and 75% (95% CI, 13%‐96%), respectively. No statistical difference was observed between the patients with classic cytogenetic findings and those with additional chromosomal abnormalities in terms of PFS and OS.CONCLUSIONSIn contrast to adults with CML, additional chromosomal abnormalities observed at diagnosis do not seem to have a significant prognostic impact. Cancer 2017;123:3609‐16. © 2017 American Cancer Society.
Hydrolysis‐Initiated Domino Process on the Rim of Open‐Cage C60 Derivatives Including Decarbonylation and Double Dehydration
Authors: Zhang Hao , Xu Liang , Gan Liangbing 
Published: May 2017

AbstractHydrolysis of an open‐cage C60 derivative in a mixture of HCl/AcOH/H2O resulted in removal of two hydroxyl groups, one carbonyl group and one aniline group in one step. A domino mechanism is proposed for the process. The newly formed open‐cage C60 derivative has three carbonyl groups on the rim of the orifice, one of which could be converted into an oxime group by treatment with hydroxylamine.