bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lithium–Graphite Paste: An Interface Compatible Anode for Solid‐State Batteries
Authors: Duan Jian , Wu Wangyan , Nolan Adelaide M. , Wang Tengrui , Wen Jiayun , Hu Chenchen , Mo Yifei , Luo Wei , Huang Yunhui 
Published: January 2019

AbstractAll‐solid‐state batteries (ASSBs) with ceramic‐based solid‐state electrolytes (SSEs) enable high safety that is inaccessible with conventional lithium‐ion batteries. Lithium metal, the ultimate anode with the highest specific capacity, also becomes available with nonflammable SSEs in ASSBs, which offers promising energy density. The rapid development of ASSBs, however, is significantly hampered by the large interfacial resistance as a matched lithium/ceramic interface that is not easy to pursue. Here, a lithium–graphite (Li–C) composite anode is fabricated, which shows a dramatic modification in wettability with garnet SSE. An intimate Li–C/garnet interface is obtained by casting Li–C composite onto garnet‐type SSE, delivering an interfacial resistance as low as 11 Ω cm2. As a comparison, pure Li/garnet interface gives a large resistance of 381 Ω cm2. Such improvement can be ascribed to the experiment‐measured increased viscosity of Li–C composite and simulation‐verified limited interfacial reaction. The Li–C/garnet/Li–C symmetric cell exhibits stable plating/striping performance with small voltage hysteresis and endures a critical current density up to 1.0 mA cm−2. The full cell paired with LiFePO4 shows stable cycle performance, comparable to the cell with liquid electrolyte. The present work demonstrates a promising strategy to develop ceramic‐compatible lithium metal‐based anodes and hence low‐impedance ASSBs.
Multiscale Graphene‐Based Materials for Applications in Sodium Ion Batteries
Authors: Zhang Yan , Xia Xinhui , Liu Bo , Deng Shengjue , Xie Dong , Liu Qi , Wang Yadong , Wu Jianbo , Wang Xiuli , Tu Jiangping 
Published: January 2019

AbstractScrupulous design and smart hybridization of bespoke electrode materials are of great importance for the advancement of sodium ion batteries (SIBs). Graphene‐based nanocomposites are regarded as one of the most promising electrode materials for SIBs due to the outstanding physicochemical properties of graphene and positive synergetic effects between graphene and the introduced active phase. In this review, the recent progress in graphene‐based electrode materials for SIBs with an emphasis on the electrode design principle, different preparation methods, and mechanism, characterization, synergistic effects, and their detailed electrochemical performance is summarized. General design rules for fabrication of advanced SIB materials are also proposed. Additionally, the merits and drawbacks of different fabrication methods for graphene‐based materials are briefly discussed and summarized. Furthermore, multiscale forms of graphene are evaluated to optimize electrochemical performance of SIBs, ranging from 0D graphene quantum dots, 2D vertical graphene and reduced graphene oxide sheets, to 3D graphene aerogel and graphene foam networks. To conclude, the challenges and future perspectives on the development of graphene‐based materials for SIBs are also presented.
Current status of the “enhanced recovery after surgery” program in gastric cancer surgery
Authors: Yamagata Yukinori , Yoshikawa Takaki , Yura Masahiro , Otsuki Sho , Morita Shinji , Katai Hitoshi , Nishida Toshiro 
Published: January 2019

AbstractSince the late 1990s, perioperative care through the enhanced recovery after surgery (ERAS, European Society for Clinical Nutrition and Metabolism [ESPEN]) program has spread. ERAS protocols aim to reduce surgical complications, improving postoperative outcomes and thereby saving resources by addressing various clinical elements through a multidisciplinary approach or based on evidence. In the field of gastric cancer, the philosophy of ERAS has gradually become accepted and, in 2014, consensus guidelines for enhanced recovery after gastrectomy were published. These guidelines consist of “procedure‐specific” guidelines and “general (not procedure‐specific) enhanced recovery items.” In this review, we focused on the procedure‐specific guidelines and tried to update the contents of every element of the procedure‐specific guidelines. The procedure‐specific guidelines consist of the following eight elements: “Preoperative nutrition,” “Preoperative oral pharmaconutrition,” “Access (of gastrectomy),” “Wound catheters and transversus abdominis plane block,” “Nasogastric/Nasojejunal decompression,” “Perianastomotic drains,” “Early postoperative diet and artificial nutrition,” and “Audit.” On reviewing papers supporting these elements, it was reconfirmed that the recommendations of the guidelines are pertinent and valid. Four meta‐analyses concerning the evaluation of ERAS protocols for gastric cancer were included in this review. Every study showed that the ERAS protocol reduced the cost and duration of hospital stay without increasing surgical complication rates, suggesting that ERAS is effective for gastric cancer surgery. However, it cannot be said that ERAS has achieved full penetration in Japan because most evidence is established in Western countries. Future studies must focus on developing a new ERAS protocols appropriate to Japanese conditions of gastric cancer.
Crypt fenestration enamel defects and early life stress: Contextual explorations of growth and mortality in Colonial Peru
Authors: Thomas Jaclyn A. , Temple Daniel H. , Klaus Haagen D. 
Published: January 2019

AbstractObjectivesThis study provides a comprehensive analysis of crypt fenestration enamel defects (CFEDs) from the Eten and Mórrope communities, Colonial period (A.D. 1,530–1,750), Lambayeque Valley, Peru. The goal is to help clarify the role of these lesions as reflections of early life environments as well as relationships growth and survival at future ages.Materials and methodsCFED absence/presence was recorded in the mandibular canines of 105 individuals and 202 teeth. Defect prevalence was compared between the Eten and Mórrope sites using a proportions test. Femoral growth residuals were compared between CFED present and absent samples. Mortality risk was evaluated using Kaplan–Meier survival analysis.ResultsCFED frequencies at Eten and Mórrope were similar to previous studies. Greater frequencies of CFEDs were found at Eten compared to Mórrope. There was no association between skeletal growth and CFEDs. No differences in mortality were found between CFED present and absent individuals within each site. General survivorship at Eten was significantly greater than Mórrope. However, individuals without CFEDs at Eten had greater survivorship than those with and without CFEDs at Mórrope. Individuals with CFEDs at Eten had greater survivorship than those with CFEDs at Mórrope. These differences begin around 1.7 years.ConclusionsCFEDs may be associated with stress experience, but associations with growth and survivorship at later ages is context dependent. CFED prevalence is an ambiguous indicator of stress when used in the absence of mortality data, and even under those circumstances, appears limited by differences in local demography.
Is it septic or cardiogenic shock? Papillary muscle rupture masquerading as sepsis
Authors: Mukherjee Ashes , Ravindranath Syamnadh 
Published: January 2019

AbstractIntroductionRupture of a papillary muscle is an extremely rare but catastrophic complication of an acute myocardial infarction. Survival is time dependent on the expedition of the patient from the area of presentation to the operating theatre for surgery. Diagnosis in the ED is possible within minutes of presentation if an echo is performed by an emergency physician skilled in echocardiography, as we demonstrate.Case presentationWe present a case of a 59 years male self‐presenting to the emergency department with undifferentiated shock. An EP performed echo directed us towards the rare but correct diagnosis. He was then transferred for percutaneous coronary intervention and surgical management.ConclusionOften in the past a diagnosis made on coronary care units or post‐mortem, we believe this diagnosis in the future will be made more frequently at the bedside in emergency departments across the world as emergency physicians continue to incorporate echocardiography as a skill in their diagnostic armoury.
Keine Scheu vor perfluorierten Peroxiden: Synthese und Strukturen von überraschend inerten Perfluoralkylperoxiden
Authors: Nissen Jan H. , Stüker Tony , Drews Thomas , Steinhauer Simon , Beckers Helmut , Riedel Sebastian 
Published: January 2019

AbstractWir berichten über die Festkörperstrukturen von Bis(nonafluor‐tert‐butyl)peroxid [(F3C)3CO]2und Bis(undecafluor‐2‐methyl‐2‐butyl)peroxid [(C2F5)(F3C)2CO]2. Diese Peroxide wurden über die Reaktion des jeweiligen Hypofluorits mit fluorierter Silberwolle dargestellt. Ihre nach In‐situ‐Kristallisation erhaltenen Strukturen weisen aufgrund der sterisch anspruchsvollen Perfluoralkylgruppen ungewöhnliche COOC‐Diederwinkel von 180°, sowie verlängerte O‐O‐Abstände auf. Die perfluorierten Alkylperoxide sind weder schock‐ (>40 J) noch reibungsempfindlich (>360 N). Darüber hinaus reagieren sie nicht mit Halogensäuren (HX, X=F, Cl, Br, I) oder elementaren Halogenen (X2). Ferrocen wird von [(F3C)3CO]2zu [FeIIICp2] [OC(CF3)3] oxidiert.
An Esterase‐like Lyase Catalyzes Acetate Elimination in Spirotetronate/Spirotetramate Biosynthesis
Authors: Lees Nicholas R. , Han Li‐Chen , Byrne Matthew J. , Davies Jonathan A. , Parnell Alice E. , Moreland Pollyanna E. J. , Stach James E. M. , van der Kamp Marc W. , Willis Christine L. , Race Paul R. 
Published: January 2019

AbstractSpirotetronate and spirotetramate natural products include a multitude of compounds with potent antimicrobial and antitumor activities. Their biosynthesis incorporates many unusual biocatalytic steps, including regio‐ and stereo‐specific modifications, cyclizations promoted by Diels–Alderases, and acetylation‐elimination reactions. Here we focus on the acetate elimination catalyzed by AbyA5, implicated in the formation of the key Diels–Alder substrate to give the spirocyclic system of the antibiotic abyssomicin C. Using synthetic substrate analogues, it is shown that AbyA5 catalyzes stereospecific acetate elimination, establishing the (R)‐tetronate acetate as a biosynthetic intermediate. The X‐ray crystal structure of AbyA5, the first of an acetate‐eliminating enzyme, reveals a deviant acetyl esterase fold. Molecular dynamics simulations and enzyme assays show the use of a His‐Ser dyad to catalyze either elimination or hydrolysis, via disparate mechanisms, under substrate control.
Intracellular Localization of an Osmocenyl‐Tamoxifen Derivative in Breast Cancer Cells Revealed by Synchrotron Radiation X‐ray Fluorescence Nanoimaging
Authors: Fus Florin , Yang Yang , Lee Hui Zhi Shirley , Top Siden , Carriere Marie , Bouron Alexandre , Pacureanu Alexandra , da Silva Julio Cesar , Salmain Michèle , Vessières Anne , Cloetens Peter , Jaouen Gérard , Bohic Sylvain 
Published: January 2019

AbstractA series of tamoxifen‐like metallocifens of the group‐8 metals (Fe, Ru, and Os) has strong antiproliferative activity on the triple‐negative breast cancer cells (MDA‐MB‐231). To shed light on the mechanism of action of these molecules, synchrotron radiation X‐ray fluorescence nanoimaging studies were performed on cells exposed to osmocenyl‐tamoxifen (Oc‐OH‐Tam) to disclose its intracellular distribution. High‐resolution mapping of the lipophilic Oc‐OH‐Tam in cells revealed its preferential accumulation in the endomembrane system. This is consistent with the ability of the amino nitrogen chain of the compounds to be protonated at physiological pH and responsible for electrostatic interactions between Oc‐OH‐Tam and membranes. A comprehensive scenario is proposed that provides new insight into the cellular behavior and activation of Oc‐OH‐Tam and advances the understanding of its mechanism of action.
Air‐Stable, Lead‐Free Zero‐Dimensional Mixed Bismuth‐Antimony Perovskite Single Crystals with Ultra‐broadband Emission
Authors: Zhang Ruiling , Mao Xin , Yang Yang , Yang Songqiu , Zhao Wenyuan , Wumaier Tuerdi , Wei Donghui , Deng Weiqiao , Han Keli 
Published: January 2019

AbstractLead‐free zero‐dimensional (0D) organic‐inorganic metal halide perovskites have recently attracted increasing attention for their excellent photoluminescence properties and chemical stability. Here, we report the synthesis and characterization of an air‐stable 0D mixed metal halide perovskite (C8NH12)4Bi0.57Sb0.43Br7⋅H2O, in which individual [BiBr6]3− and [SbBr6]3− octahedral units are completely isolated and surrounded by the large organic cation C8H12N+. Upon photoexcitation, the bulk crystals exhibit ultra‐broadband emission ranging from 400 to 850 nm, which originates from both free excitons and self‐trapped excitons. This is the first example of 0D perovskites with broadband emission spanning the entire visible spectrum. In addition, (C8NH12)4Bi0.57Sb0.43Br7⋅H2O exhibits excellent humidity and light stability. These findings present a new direction towards the design of environmentally‐friendly, high‐performance 0D perovskite light emitters.
Ruthenium‐Catalyzed ortho C−H Borylation of Arylphosphines
Authors: Fukuda Kazuishi , Iwasawa Nobuharu , Takaya Jun 
Published: January 2019

AbstractEfficient, phosphine‐directed ortho C−H borylation of arylphosphine derivatives was achieved using Ru catalysts for the first time. The reaction is applicable to various tertiary arylphosphine and arylphosphinite derivatives to give (o‐borylaryl)phosphorus compounds in high yields. This reaction enables easy access to a variety of functionalized phosphine ligands and ambiphilic phosphine boronate compounds, thus realizing a new late‐stage modification of phosphorus compounds.
Copper‐Catalyzed Enantioselective Construction of Tertiary Propargylic Sulfones
Authors: Gómez José Enrique , Cristòfol Àlex , Kleij Arjan W. 
Published: January 2019

AbstractTertiary propargylic sulfones are of significant importance in organic synthesis and medicinal chemistry, but to date no general asymmetric synthesis approach has been developed. We disclose a versatile copper‐catalyzed sulfonylation of propargylic cyclic carbonates using sodium sulfinates that allows the construction of propargylic sulfones featuring elusive quaternary stereocenters. This method provides the first successful example of such an enantioselective propargylic sulfonylation, features high asymmetric induction, wide functional group tolerance, and scalability, and enables attractive product diversification.
An Integrated CO2 Electrolyzer and Formate Fuel Cell Enabled by a Reversibly Restructuring Pb–Pd Bimetallic Catalyst
Authors: Lu Xu , Wu Yueshen , Yuan Xiaolei , Wang Hailiang 
Published: January 2019

AbstractA single device combining the functions of a CO2 electrolyzer and a formate fuel cell is a new option for carbon‐neutral energy storage but entails rapid, reversible and stable interconversion between CO2 and formate over a single catalyst electrode. We report a new catalyst with such functionalities based on a Pb–Pd alloy system that reversibly restructures its phase, composition, and morphology and thus alters its catalytic properties under controlled electrochemical conditions. Under cathodic conditions, the catalyst is relatively Pb‐rich and is active for CO2‐to‐formate conversion over a wide potential range; under anodic conditions, it becomes relatively Pd‐rich and gains stable catalytic activity for formate‐to‐CO2 conversion. The bifunctional activity and superior durability of our Pb–Pd catalyst leads to the first proof‐of‐concept demonstration of an electrochemical cell that can switch between the CO2 electrolyzer/formate fuel cell modes and can stably operate for 12 days.
Chromium complexes based on thiophene–imine ligands for ethylene oligomerization
Authors: Ferreira Jorge , Zilz Raquel , Boeira Igor S. , da Silva Sabrina M. , Casagrande Adriana C.A. , Casagrande Osvaldo L. 
Published: January 2019

A new set of Cr(III) complexes, {L}CrCl3(THF), based on thiophene–imine (2a, L = PhOC6H4(N═CH)‐2‐SC4H3; 2b, L = PhOC2H4(N═CH)‐2‐SC4H3; 2c, L = Ph(NH)C2H4(N═CH)‐2‐SC4H3; 2d, L = PhOC6H4(N═CH)‐2‐SC4H2‐5‐Ph; 2e, L = Ph(NH)C2H4(N═CH)‐2‐SC4H2‐5‐Ph) have been prepared and characterized using elemental analysis and infrared spectroscopy. Upon activation with methylaluminoxane, all the chromium complexes generated active systems affording a nonselective distribution of α‐olefins with turnover frequencies in the range 9500–93 500 (mol ethylene) (mol Cr)−1 h−1, and producing mostly oligomers (95.0–99.3 wt% of total products). Small amounts of polymer were produced in these oligomerization reactions (0.8–8.2 wt%). The catalytic activities were quite sensitive to the ligand environment. Moreover, the effects of oligomerization parameters (temperature, [Al]/[Cr] molar ratio, time) on the activity and on the product distribution were examined.
Oxidation of sulfides including DBT using a new vanadyl complex of a non‐innocent o‐aminophenol benzoxazole based ligand
Authors: Saeedi Roonak , Safaei Elham , Lee Yong‐Ill , Lužnik Janez 
Published: January 2019

Reaction of a non‐innocent o‐aminophenol benzoxazole based ligand HLBAP with VOCl3 afforded a vanadyl complex, VOLBIS (SQ), in which SQ is a 2,4‐di‐tert‐butylsemiquinone produced from hydrolysis of HLBAP. The crystal structure of VOLBIS (SQ) exhibits an octahedral geometry with the VO2+ center coordinated by two nitrogen and one oxygen atoms of LBAP and two oxygen atoms of SQ. Electrochemical studies showed quasi‐reversible metal‐centered reduction and ligand‐centered oxidation of complex. The magnetic moment of VOLBIS (SQ) is consistent with the spin‐only value expected for S = 1/2 system. The neutral species of VOLBIS (SQ) is EPR active, which is consistent with a paramagnetic electronic ground state (S = 1/2). This result is in accordance with the vanadyl (IV) moiety surrounded by tridentate iminobenzosemiquinonate anion radical (HLBIS)•‐ and benzosemiquinone ligand (SQ)•. The theoretical calculations confirm the experimental results. Furthermore, we present the optimal conditions for maximum efficiency of sulfide oxidation for oxidative desulfurization with hydrogen peroxide and 6 times reusability of catalyst for sulfoxidation of dibenzothiophene.
Impact of thermal processing or solvent casting upon crystallization of PLA nanocellulose and/or nanoclay composites
Authors: Trifol J. , van Drongelen M. , Clegg F. , Plackett D. , Szabo P. , Daugaard A. E. 
Published: January 2019

ABSTRACTHere, we present how processing (solvent casting or isothermal crystallization) impacts crystallinity of poly(lactic acid) (PLA) and its nanocomposites (PLA/1 wt % cellulose nanofibers (CNFs), PLA/1 wt % nanoclay (C30B) or PLA/1 wt % CNF/1 wt % C30B. Polarized optical microscopy demonstrated a heterogeneous nucleation process during isothermal crystallization leading to smaller homogeneously distributed spherulites. With solvent casting, no effect on morphology was observed with respect to the nanoparticles, but an increased spherulite size was observed at higher temperatures. This fact raises significant concerns regarding the suitability of solvent casting as a lab‐scale procedure to investigate materials. Additionally, combining the reinforcing agents, CNF, and C30B, did not increase nucleation rate, in contrast with the general tendency, where the incorporation of both particles led to improved properties (e.g., thermomechanical and barrier properties). However, a combination of C30B and CNF did lead to an overall increase in the rigid amorphous fraction and a reduced mobile amorphous fraction. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47486.
Polyurethane‐based poly (ionic liquid)s for CO2 removal from natural gas
Authors: Bernard Franciele L. , dos Santos Leonardo M. , Schwab Marina B. , Polesso Barbara B. , do Nascimento Jailton F. , Einloft Sandra 
Published: January 2019

ABSTRACTCarbon dioxide separation from CH4 is important to the environment and natural gas processing. Poly (ionic liquid)s (PILs) based on polyurethane structures are considered as potential materials for CO2 capture. Thus, a series of anionic PILs based on polyurethane were synthesized. The effects of polyol chemical structure and counter‐cations (imidazolium, phosphonium, ammonium, and pyridinium) in CO2 sorption capacity and CO2/CH4 separation performance were evaluated. The synthesized PILs were characterized by NMR, DSC, TGA, dinamical mechanical thermo analysis (DMTA), SEM, and AFM. CO2 sorption, reusability, and CO2/CH4 selectivity were assessed by the pressure‐decay technique. The counter‐cation and polyol chemical structure play an important role in CO2 sorption and CO2/CH4 selectivity. PILs exhibited competitive thermal mechanical properties. Results showed that PILPC‐TBP was the best poly (ionic liquid) for CO2/CH4 separation. Moreover, poly (liquid ionic) base polyol (polycarbonate) with phosphonium (PILPC‐TBP) demonstrated higher CO2 sorption capacity (21.4 mgCO2/g at 303.15 K and 0.08 MPa) as compared to other reported poly (ionic liquids). © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47536.
Associations of Symptomatic Knee Osteoarthritis With Histopathologic Features in Subchondral Bone
Authors: Aso Koji , Shahtaheri S. Mohsen , Hill Roger , Wilson Deborah , McWilliams Daniel F. , Walsh David A. 
Published: January 2019

ObjectiveSubchondral bone and the osteochondral junction are thought to contribute to osteoarthritis (OA) knee pain. We undertook this study to identify osteochondral pathologies specifically associated with symptomatic human knee OA.MethodsMedial tibial plateau samples from 2 groups of subjects (n = 31 per group) were matched for macroscopic chondropathy scores. The symptomatic chondropathy group had undergone total knee replacement for OA knee pain, at which time specimens of the medial tibial plateau were obtained. The asymptomatic chondropathy group included subjects who died of unrelated illness (specimens were obtained at postmortem examination) and who had not previously sought help for knee pain. OA histopathology, immunoreactivity for nerve growth factor (NGF) and CD68 (macrophages), tartrate‐resistant acid phosphatase–positive subchondral osteoclasts, and synovitis were compared between groups.ResultsMankin scores, subchondral bone density, and subchondral CD68‐immunoreactive macrophage infiltration were similar between the 2 groups. NGF‐like immunoreactivity was found in subchondral mononuclear cells and osteoclasts, as well as in chondrocytes. NGF in osteochondral channels and osteoclast densities in subchondral bone were higher in the symptomatic chondropathy group than in the asymptomatic chondropathy group (P < 0.01 and P = 0.02, respectively), as were synovitis scores (P < 0.01). Osteochondral pathology was not significantly associated with synovitis score. The differences in NGF expression and in osteoclast density remained significant after adjustment for age and synovitis score (P = 0.01 and P = 0.04, respectively). Osteochondral NGF and osteoclast densities, together with synovitis scores, explained ~28% of sample allocation to symptomatic or asymptomatic groups.ConclusionSubchondral pathology was associated with symptomatic knee OA, independent of chondropathy and synovitis. Increased NGF expression in osteochondral channels and increased osteoclast density appear to be key features associated with bone pain in knee OA.