bluuebunny/crossref_metadata_2025_split huggingface dataset:
Soehendra stent retriever for dilation of tight biliary and pancreatic duct strictures defying conventional wire‐guided endoscopic techniques: Single‐center experiences
Authors: Chen Sheng‐Hung , Huang Wen‐Hsin , Yu Cheng‐Ju , Ting Chun‐Fu , Yang Chi‐Ying , Chuang Shih‐Chieh , Peng Cheng‐Yuan 
Published: July 2019

AbstractEndoscopists frequently encounter severe tight strictures during therapeutic endoscopic retrograde cholangiopancreatography. Dilation using a Soehendra stent retriever (SSR) can be the approach of choice. However, reports of SSR use for the aforementioned strictures are scant. Patients presenting with strictures of the biliary or pancreatic ducts between July 2015 and March 2019 were prospectively screened. The aforementioned strictures allowed the passage of only a guidewire but denied 5.5‐French (Fr) catheter advancement and conventional balloon or catheter dilation. After guidewire passage and endoscopic sphincterotomy, an (7‐Fr) SSR was screwed clockwise over a guidewire and advanced progressively to traverse and dilate the stricture proximally. A plastic stent was then placed in the biliary or pancreatic duct for internal drainage. The stricture and procedural characteristics and immediate postprocedural status were analyzed. Eleven patients (nine men and two women; median age 58 [range 43‐75] years) with severe benign strictures of the biliary (n = 5) or pancreatic (n = 6) ducts were included. The median length of the strictures was 5 (range 2‐9) mm. All 11 severe strictures were successfully dilated using an SSR followed by stenting with a plastic stent (range 5‐7 Fr). Only one patient had brief minor hemobilia immediately after the procedure, and another briefly experienced acute cholangitis. Five (5/6, 83.3%) patients in the pancreatic group eventually achieved stent removal. None of the patients achieved stent removal in the biliary duct group until the end of follow‐up. Nonetheless, the patients did not require percutaneous or surgical interventions. Dilation using the SSR is safe, tolerable, and successful for the tight biliary and pancreatic duct strictures that defy conventional wire‐guided endoscopic access.
The diagnostic yield and risk of screening colonoscopy in geriatric subjects older than 80 years
Authors: Lin Zong‐Wei , Hsu Chen‐Ming , Cheng Hao‐Tsai , Su Ming‐Yao , Ho Yu‐Pin , Chen Tsung‐Hsing , Chu Pao‐Hsien 
Published: July 2019

AbstractThe aim of the study is to evaluate the diagnostic yield and risks of screening colonoscopy in octogenarians and older. A retrospective review of medical records in the Chang Gung Healthcare Center from January 2010 to December 2016 was performed. A total of 164 adults older than 80 years receiving screening colonoscopy were enrolled. Cecal intubation rate, colonoscopic finding, renal function, colon preparation, and procedure‐related complications were used to estimate the outcome of colonoscopy. All participants were under deep sedation. The crude cecal intubation rate was 95%. Acceptable colon preparation was 95.1%. No procedure‐related complications, such as bleeding or perforation, occurred in this study. The level of creatinine increasing more than 25% were two (6.3%) in polyethylene glycol group and 10 (16.1%) in oral sodium phosphate solution (NaP) group. The colonoscopic finding were as follows: 19 advanced neoplasms (11.5%), 56 non‐advanced adenomas (34.1%), and 38 hyperplastic polyps (23.2%). This study disclosed the diagnostic yield and safety of colonoscopy in octogenarians and older. In addition, we should be cautious when giving NaP to these subjects.
Phenotype evolution and health issues of adults with Beckwith‐Wiedemann syndrome
Authors: Gazzin Andrea , Carli Diana , Sirchia Fabio , Molinatto Cristina , Cardaropoli Simona , Palumbo Giuseppe , Zampino Giuseppe , Ferrero Giovanni Battista , Mussa Alessandro 
Published: July 2019

AbstractBackgroundBeckwith‐Wiedemann syndrome (BWS) phenotype usually mitigates with age and data on adulthood are limited. Our study aims at reporting phenotype evolution and health issues in adulthood.Methods34 patients (16 males), aged 18–58 years (mean 28.5) with BWS were enrolled.Results26 patients were molecularly confirmed, 5 tested negative, and 3 were not tested. Final tall stature was present in 44%. Four patients developed Wilms' Tumor (2, 3, 5, and 10 years, respectively); one hepatoblastoma (22 years); one acute lymphoblastic leukemia (21 years); one adrenal adenoma and testicular Sertoli cell tumor (22 and 24 years, respectively); and three benign tumors (hepatic haemangioma, uterine myoma, and mammary fibroepithelioma). Surgery for BWS‐related features was required in 85%. Despite surgical correction several patients presented morbidity and sequelae of BWS pediatric issues: pronunciation/swallow difficulties (n = 9) due to macroglossia, painful scoliosis (n = 4) consistent with lateralized overgrowth, recurrent urolithiasis (n = 4), azoospermia (n = 4) likely consequent to cryptorchidism, severe intellectual disability (n = 2) likely related to neonatal asphyxia and diabetes mellitus (n = 1) due to subtotal pancreatectomy for intractable hyperinsulinism. Four patients (two males) had healthy children (three physiologically conceived and one through assisted reproductive technology).ConclusionsAdult health conditions in BWS are mostly consequent to pediatric issues, underlying the preventive role of follow‐up strategies in childhood. Malignancy rate observed in early adulthood in this small cohort matches that observed in the first decade of life, cumulatively raising tumor rate in BWS to 20% during the observation period. Further studies are warranted in this direction.
A new three‐dimensional geometric morphometrics analysis of the Ouranopithecus macedoniensis cranium (Late Miocene, Central Macedonia, Greece)
Authors: Ioannidou Melania , Koufos George D. , de Bonis Louis , Harvati Katerina 
Published: July 2019

AbstractObjectivesThis study aims to virtually reconstruct the deformed face (XIR‐1) and maxilla (RPl‐128) of the Late Miocene hominoid Ouranopithecus macedoniensis from Greece, through the application of mirror‐imaging and segmentation. Additionally, analysis was conducted through 3D geometric morphometrics, utilizing a comparative sample of fossil hominoids, extant great apes (Gorilla, Pan, and Pongo) and humans, so as to explore shape variation and phenetic similarities between them.Materials and methodsHigh‐resolution computed tomography was used to create digital representations of the XIR‐1 and RPl‐128 specimens. The virtual reconstruction of the XIR‐1 cranium was achieved by mirror‐imaging, while the RPl‐128 maxilla was virtually segmented and reattached in a correct anatomical position. Anatomical landmarks were registered in three dimensions on a comparative sample of adult crania of extant great apes, humans and fossil hominoids. The data were processed with Procrustes superimposition and analyzed using multivariate statistics methods.ResultsResults show that Ouranopithecus macedoniensis falls within or close to the Gorilla convex hull in the principal component analyses, and it is closer to the mean Procrustes shape distance of primarily Gorilla. Both specimens, XIR‐1 and RPl‐128, are classified as Gorilla based on discriminant function analyses.DiscussionThe results of our geometric morphometrics analyses indicate that Ouranopithecus macedoniensis is morphologically more similar to Gorilla than to Homo, Pan, or Pongo, results that can contribute to the evaluation of existing hypotheses about its phylogenetic position.
Fluor und Lithium: Ideale Partner für Elektrolyte in wiederaufladbaren Hochleistungsbatterien
Authors: von Aspern N. , Röschenthaler G.‐V. , Winter M. , Cekic‐Laskovic I. 
Published: July 2019

AbstractEine weitere Verbesserung der Energiedichte für wiederaufladbare Lithium‐Batterien verlangt nach neuartigen Zellchemien, die moderne Elektrodenmaterialien mit geeigneten Elektrolyten verbinden ohne die Gesamtleistung und Sicherheit, insbesondere für Hochvolt‐Anwendungen, zu verringern. Signifikante Verbesserungen in neu entwickelten Akkumulatorzellen gegenüber traditionellen, auf organischen Carbonaten basierenden Elektrolyten können durch die Einführung von Fluor in die Salz‐, Lösungsmittel/Co‐Lösungsmittel‐ oder Additivstruktur erreicht werden. Die richtige Kombination der Vorteile verschiedener Komponenten dominiert die Optimierung von Elektrolyten und Zellchemien im Hinblick auf bestimmte Anwendungen. Dieser Aufsatz soll Forschungsaktivitäten und technische Entwicklungen von Fluor‐basierten Materialien für aprotische, nicht‐wässrige Elektrolyte auf Lösungsmittelbasis und deren Bestandteile sowie die Herausforderungen und Limitierungen beleuchten. Fluorhaltige Elektrolyte, die auf ionischen Flüssigkeiten basieren, werden in diesem Aufsatz nicht behandelt.
Electrophilic Iron Catalyst Paired with a Lithium Cation Enables Selective Functionalization of Non‐Activated Aliphatic C−H Bonds via Metallocarbene Intermediates
Authors: Hernán‐Gómez Alberto , Rodríguez Mònica , Parella Teodor , Costas Miquel 
Published: July 2019

AbstractCombining an electrophilic iron complex [Fe(Fpda)(THF)]2 (3) [Fpda=N,N′‐bis(pentafluorophenyl)‐o‐phenylenediamide] with the pre‐activation of α‐alkyl‐substituted α‐diazoesters reagents by LiAl(ORF)4 [ORF=(OC(CF3)3] provides unprecedented access to selective iron‐catalyzed intramolecular functionalization of strong alkyl C(sp3)−H bonds. Reactions occur at 25 °C via α‐alkyl‐metallocarbene intermediates, and with activity/selectivity levels similar to those of rhodium carboxylate catalysts. Mechanistic investigations reveal a crucial role of the lithium cation in the rate‐determining formation of the electrophilic iron‐carbene intermediate, which then proceeds by concerted insertion into the C−H bond.
Local Structure and Coordination Define Adsorption in a Model Ir1/Fe3O4 Single‐Atom Catalyst
Authors: Jakub Zdenek , Hulva Jan , Meier Matthias , Bliem Roland , Kraushofer Florian , Setvin Martin , Schmid Michael , Diebold Ulrike , Franchini Cesare , Parkinson Gareth S. 
Published: July 2019

AbstractSingle‐atom catalysts (SACs) bridge homo‐ and heterogeneous catalysis because the active site is a metal atom coordinated to surface ligands. The local binding environment of the atom should thus strongly influence how reactants adsorb. Now, atomically resolved scanning‐probe microscopy, X‐ray photoelectron spectroscopy, temperature‐programmed desorption, and DFT are used to study how CO binds at different Ir1 sites on a precisely defined Fe3O4(001) support. The two‐ and five‐fold‐coordinated Ir adatoms bind CO more strongly than metallic Ir, and adopt structures consistent with square‐planar IrI and octahedral IrIII complexes, respectively. Ir incorporates into the subsurface already at 450 K, becoming inactive for adsorption. Above 900 K, the Ir adatoms agglomerate to form nanoparticles encapsulated by iron oxide. These results demonstrate the link between SAC systems and coordination complexes, and that incorporation into the support is an important deactivation mechanism.
Fluorine and Lithium: Ideal Partners for High‐Performance Rechargeable Battery Electrolytes
Authors: von Aspern N. , Röschenthaler G.‐V. , Winter M. , Cekic‐Laskovic I. 
Published: July 2019

AbstractFurther enhancement in the energy densities of rechargeable lithium batteries calls for novel cell chemistry with advanced electrode materials that are compatible with suitable electrolytes without compromising the overall performance and safety, especially when considering high‐voltage applications. Significant advancements in cell chemistry based on traditional organic carbonate‐based electrolytes may be successfully achieved by introducing fluorine into the salt, solvent/cosolvent, or functional additive structure. The combination of the benefits from different constituents enables optimization of the electrolyte and battery chemistry toward specific, targeted applications. This Review aims to highlight key research activities and technical developments of fluorine‐based materials for aprotic non‐aqueous solvent‐based electrolytes and their components along with the related ongoing scientific challenges and limitations. Ionic liquid‐based electrolytes containing fluorine will not be considered in this Review.
Antimony‐Based Composites Loaded on Phosphorus‐Doped Carbon for Boosting Faradaic Efficiency of the Electrochemical Nitrogen Reduction Reaction
Authors: Liu Xien , Jang Haeseong , Li Ping , Wang Jia , Qin Qing , Kim Min Gyu , Li Guangkai , Cho Jaephil 
Published: July 2019

AbstractA nanocomposite of PC/Sb/SbPO4 (PC, phosphorus‐doped carbon) exhibits a high activity and an excellent selectivity for efficient electrocatalytic conversion of N2 to NH3 in both acidic and neutral electrolytes under ambient conditions. At a low reductive potential of −0.15 V versus the reversible hydrogen electrode (RHE), the PC/Sb/SbPO4 catalyst achieves a high Faradaic efficiency (FE) of 31 % for ammonia production in 0.1 m HCl under mild conditions. In particular, a remarkably high FE value of 34 % is achieved at a lower reductive potential of −0.1 V (vs. RHE) in a 0.1 m Na2SO4 solution, which is better than most reported electrocatalysts towards the nitrogen reduction reaction (NRR) in neutral electrolyte under mild conditions. The change in surface species and electrocatalytic performance before and after N2 reduction is explored by an ex situ method. PC and SbPO4 are both considered as the active species that enhanced the performance of NRR.
Coating of polylactide films by chitosan: Comparison of methods
Authors: Demina Tatiana S. , Frolova Anastasia А. , Istomin Alexander V. , Kotova Svetlana L. , Piskarev Mikhail S. , Bardakova Ksenia N. , Yablokov Mikhail Y. , Altynov Vladimir A. , Kravets Liubov I. , Gilman Alla B. , Akopova Tatiana A. , Timashev Peter S. 
Published: July 2019

ABSTRACTControl over biomaterials surface characteristics through surface modification or deposition of coatings is one of the key aspects of tissue engineering. This work was aimed to evaluate an effectiveness of various methods of chitosan‐coating formations onto polylactide films using a number of techniques, such as vacuum deposition by electron‐beam sputtering, chemical entrapment method, and electrospray procedure. Differently coated films were studied in terms of surface morphology (scanning electron and atomic‐force microscopy), chemical structure (FTIR and X‐ray photoelectron spectroscopy), and hydrophilic/hydrophobic balance (goniometry). The effect of coating technique on homogeneity of chitosan distribution over the substrate surface was evaluated using genipin and fluorescein isothiocyanate labeling as well as FTIR‐microscopy. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48287.
Zinc‐Catalysed Hydroboration of Terminal and Internal Alkynes
Authors: Mandal Souvik , Mandal Sayantan , Geetharani K. 
Published: July 2019

AbstractA regioselective hydroboration of alkynes has been developed by using commercially available zinc triflate as a catalyst, in the presence of catalytic amount of NaBHEt3. The reaction tolerates a wide range of terminal alkynes having several synthetically useful functional groups and proceeds regioselectively to furnish hydroborated products in moderate to excellent yields. This system shows moderate chemoselectivity towards terminal C≡C bond over terminal and internal C=C bond and internal C≡C bond.
Colloidal Template Synthesis of Nanomaterials by Using Microporous Organic Nanoparticles: The Case of C@MoS2 Nanoadsorbents
Authors: Kang Shin Young , Kang Chang Wan , Kim Dong Wook , Myung Yoon , Choi Jaewon , Lee Sang Moon , Kim Hae Jin , Ko Yoon‐Joo , Son Seung Uk 
Published: July 2019

AbstractThe so‐called colloidal template synthesis has been applied to the preparation of surface‐engineered nanoadsorbents. Colloidal microporous organic network nanotemplates (C‐MONs), which showed a high surface area (611 m2 g−1) and enhanced microporosity, were prepared through the networking of organic building blocks in the presence of poly(vinylpyrrolidone) (PVP). Owing to entrapment of the PVP in networks, the C‐MONs showed good colloidal dispersion in EtOH. MoS2 precursors were incorporated into the C‐MONs and heat treatment afforded core–shell‐type C@MoS2 nanoparticles with a diameter of 80 nm, a negative zeta potential (−39.5 mV), a high surface area (508 m2 g−1), and excellent adsorption performance towards cationic dyes (qmax=343.6 and 421.9 mg g−1 for methylene blue and rhodamine B, respectively).
Sustainability reporting, materiality, and accountability assessment in the airport industry
Authors: Karagiannis Ioannis , Vouros Panagiotis , Skouloudis Antonis , Evangelinos Konstantinos 
Published: July 2019

AbstractAir travel is, nowadays, recognized as being one of the most popular modes of transport. Air transport is among the most significant contributors to the world gross domestic product and is accountable for a great environmental and social impact. Driven by the well‐established sustainability discourse and the vital role businesses can play in disseminating the sustainable development concept, this paper attempted to map airport industry's most material operational aspects and assess airport operators' accountability level on disclosing corporate information regarding airports' economic, environmental, and social performance. In this context, 33 reports and 903 material issues representing 193 international airports were reviewed and assessed, and a methodology for benchmarking the accountability level of best reporting airport operators was developed, showcasing materiality assessment as a useful management tool for strengthening airport operators' business strategy and enhancing their corporate performance. The paper indicated that (a) customer focus (i.e., health, safety and satisfaction), economic viability, and business continuity and preparedness are operational aspects of high materiality and (b) the disclosure level, especially concerning specific performance indicators, is still moderate. In conclusion, this study has shown that materiality assessment gains ground as a management tool among airports' management teams and the completeness of Sustainability reports is positively correlated with the “level” of adherence as described by the Global Reporting Initiative.
Significantly Enhanced Charge Separation in Rippled Monolayer Graphitic C3N4
Authors: Sun Jiuyu , Li Xingxing , Yang Jinlong 
Published: July 2019

AbstractGraphitic C3N4 (g−C3N4) is one of the most popular two‐dimensional (2D) materials as a milestone of metal‐free photocatalysis for solar water splitting. However, pure g−C3N4 presents a poor efficiency of electron‐hole separation. Here by first‐principles calculations, we propose that without any chemical modification, the electron‐hole separation can be significantly promoted by just rippling g−C3N4. Interestingly, the rippled structures are found more stable than complanate structure in thermodynamics. Furthermore, a lateral Type‐II heterojunction is formed in rippled g−C3N4 between the strongly and hardly rippled areas, with the valence band maximum (VBM) and conduction band minimum (CBM) of the whole structure spatially separated. Thus the photo‐generated electrons and holes are driven to different regions in rippled monolayer g−C3N4. Our work reveals the rippled g−C3N4, with potential advantage of high efficiency of electron‐hole separation, is a flexible and promising platform for metal‐free photocatalytic water splitting.
Copper‐Catalysed Suzuki‐Miyaura Cross‐Coupling of Highly Fluorinated Aryl Boronate Esters with Aryl Iodides and Bromides and Fluoroarene−Arene π‐Stacking Interactions in the Products
Authors: Budiman Yudha P. , Friedrich Alexandra , Radius Udo , Marder Todd B. 
Published: July 2019

AbstractA combination of copper iodide and phenanthroline as the ligand is an efficient catalyst for Suzuki‐Miyaura cross‐coupling of highly fluorinated boronate esters (aryl−Bpin) with aryl iodides and bromides to generate fluorinated biaryls in good to excellent yields. This method represents a nice alternative to traditional cross‐coupling methods which require palladium catalysts and stoichiometric amounts of silver oxide. We note that π⋅⋅⋅π stacking interactions dominate the molecular packing in the partly fluorinated biaryl crystals investigated herein. They are present either between the arene and perfluoroarene, or solely between arenes or perfluoroarenes, respectively.
Metal‐Organic Frameworks‐Derived NiS2/CoS2/N‐Doped Carbon Composites as Electrode Materials for Asymmetric Supercapacitor
Authors: Liu Hui , Guo Hao , Yue Liguo , Wu Ning , Li Qi , Yao Wenqin , Xue Rui , Wang Mingyue , Yang Wu 
Published: July 2019

AbstractTransition metal sulfides derived from metal‐organic frameworks (MOFs) have received increasing attention as a potential energy storage electrode material. Here, a series of NiS2/CoS2/NC‐T (T=temperature) have been successfully constructed by carbonizing and sulfuring the precursor of Ni/Co‐MOF. It is worth emphasizing that N‐doped carbon materials improve the conductivity of the electrode material. Moreover, NiS2/CoS2/NC‐500 maintains the rod‐like structure of the precursor and exhibits a high specific capacitance of 1325 F g−1 at a current density of 1 A g−1. Apart from high capacitance, the NiS2/CoS2/NC‐500 also demonstrated excellent cycling stability with retention rate of 75 % after 5000 cycles at a current density of 5 A g−1. The good performance could be attributed to the unique rod‐like structure and pore‐size distribution of NiS2/CoS2/NC‐500. Moreover, an assembled asymmetric supercapacitor NiS2/CoS2/NC‐500//AC displays a high energy density of 53.93 Wh kg−1 at a power density of 800 W kg−1 and good cycle stability with capacitance retention of 85.71 % after 20,000 cycles at 5 A g−1. In particular, a red LED can be illuminated by the assembled ASC, indicating that as‐synthesized NiS2/CoS2/NC‐500 hold great potential for practical applications.
Molecular Vibrations of an Oxygen‐Evolving Complex and Its Synthetic Mimic
Authors: Tychengulova Aliya , Capone Mateo , Pitari Fabio , Guidoni Leonardo 
Published: July 2019

AbstractBio‐inspired catalysis for artificial photosynthesis has been widely studied for decades, in particular, with the purpose of using bio‐disposable and non‐toxic metals as building blocks. The characterisation of such catalysts has been achieved by using different kinds of spectroscopic methods, from X‐ray crystallography to NMR spectroscopy. An artificial Mn4CaO4 cubane cluster with dangling Mn4 was synthesised in 2015 [Zhang et al. Science 2015, 348, 690–693]; this cluster showed many structural similarities to that of the natural oxygen‐evolving complex. An accurate structural and spectroscopic comparison between the natural and artificial systems is highly relevant to understand the catalytic mechanism. Among data from different techniques, the differential FTIR spectra (Sn+1−Sn) of photosystem II are still lacking a complete interpretation. The availability of IR data of the artificial cluster offers a unique opportunity to assign absolute absorption spectra on a well‐defined and easier to interpret analogous moiety. The present work aims to investigate the novel inorganic compound as a model system for an oxygen‐evolving complex through measurement of its spectroscopic properties. The experimental results are compared with calculations by using a variety of theoretical methods (normal mode analysis, effective normal mode analysis) in the S1 state. We underline the similarities and the differences in the computational spectra based on atomistic models of Mn4CaO5 and Mn4CaO4 complexes.