bluuebunny/crossref_metadata_2025_split huggingface dataset:
Flexible and Stretchable Biobatteries: Monolithic Integration of Membrane‐Free Microbial Fuel Cells in a Single Textile Layer
Authors: Pang Sumiao , Gao Yang , Choi Seokheun 
Published: November 2017

AbstractThe fabrication and performance of a flexible and stretchable microbial fuel cell (MFC) monolithically integrated into a single sheet of textile substrate are reported. The single‐layer textile MFC uses Pseudomonas aeruginosa (PAO1) as a biocatalyst to produce a maximum power of 6.4 µW cm−2 and current density of 52 µA cm−2, which are substantially higher than previous textile‐MFCs and are similar to other flexible paper‐based MFCs. The textile MFC demonstrates a stable performance with repeated stretching and twisting cycles. The membrane‐less single‐chamber configuration drastically simplifies the fabrication and improves the performance of the MFC. A conductive and hydrophilic anode in a 3D fabric microchamber maximizes bacterial electricity generation from a liquid environment and a silver oxide/silver solid‐state cathode reduces cathodic overpotential for fast catalytic reaction. A simple batch fabrication approach simultaneously constructs 35 individual devices, which will revolutionize the mass production of textile MFCs. This stretchable and twistable power device printed directly onto a single textile substrate can establish a standardized platform for textile‐based biobatteries and will be potentially integrated into wearable electronics in the future.
Three‐Dimensional Anionic Cyclodextrin‐Based Covalent Organic Frameworks
Authors: Zhang Yuanyuan , Duan Jiyun , Ma Dou , Li Pengfei , Li Siwu , Li Haiwei , Zhou Junwen , Ma Xiaojie , Feng Xiao , Wang Bo 
Published: November 2017

AbstractThree‐dimensional covalent organic frameworks (3D COFs) are promising crystalline materials with well‐defined structures, high porosity, and low density; however, the limited choice of building blocks and synthetic difficulties have hampered their development. Herein, we used a flexible and aliphatic macrocycle, namely γ‐cyclodextrin (γ‐CD), as the soft struts for the construction of a polymeric and periodic 3D extended network, with the units joined via tetrakis(spiroborate) tetrahedra with various counterions. The inclusion of pliable moieties in the robust open framework endows these CD‐COFs with dynamic features, leading to a prominent Li ion conductivity of up to 2.7 mS cm−1 at 30 °C and excellent long‐term Li ion stripping/plating stability. Exchanging the counterions within the pores can effectively modulate the interactions between the CD‐COF and CO2 molecules.
Glass Microsphere‐Supported Giant Vesicles for the Observation of Self‐Reproduction of Lipid Boundaries
Authors: Fiore Michele , Maniti Ofelia , Girard‐Egrot Agnes , Monnard Pierre‐Alain , Strazewski Peter 
Published: November 2017

AbstractGrowth and division experiments on phospholipid boundaries were carried out using glass microsphere‐supported phospholipid (DOPC) giant vesicles (GVs) fed with a fatty acid solution (oleic acid) at two distinct feeding rates. Both fast and slow feeding methods produced daughter GVs. Under slow feeding conditions the membrane growth process (evagination, buds, filaments) was observed in detail by fluorescence microscopy. The density difference between supported mother vesicles and newly formed daughter vesicles allowed their easy separation. Mass spectrometric analysis of the resulting mother and daughter GVs showed that the composition of both vesicle types was a mixture of original supported phospholipids and added fatty acids reflecting the total composition of amphiphiles after the feeding process. Thus, self‐reproduction of phospholipid vesicles can take place under preservation of the lipid composition but different aggregate size.
Donor–σ–Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion
Authors: Geng Yan , D'Aleo Anthony , Inada Ko , Cui Lin‐Song , Kim Jong Uk , Nakanotani Hajime , Adachi Chihaya 
Published: November 2017

AbstractA family of organic emitters with a donor–σ–acceptor (D‐σ‐A) motif is presented. Owing to the weakly coupled D‐σ‐A intramolecular charge‐transfer state, a transition from the localized excited triplet state (3LE) and charge‐transfer triplet state (3CT) to the charge‐transfer singlet state (1CT) occurred with a small activation energy and high photoluminescence quantum efficiency. Two thermally activated delayed fluorescence (TADF) components were identified, one of which has a very short lifetime of 200–400 ns and the other a longer TADF lifetime of the order of microseconds. In particular, the two D‐σ‐A materials presented strong blue emission with TADF properties in toluene. These results will shed light on the molecular design of new TADF emitters with short delayed lifetimes.
Record High‐Nuclearity Polyoxoniobates: Discrete Nanoclusters {Nb114}, {Nb81}, and {Nb52}, and Extended Frameworks Based on {Cu3Nb78} and {Cu4Nb78}
Authors: Jin Lu , Zhu Zeng‐Kui , Wu Yan‐Lan , Qi Yan‐Jie , Li Xin‐Xiong , Zheng Shou‐Tian 
Published: November 2017

AbstractA series containing the highest nuclearity polyoxoniobate (PONb) nanoclusters, ranging from dimers to tetramers, has been obtained. They include one 114‐nuclear {Li8⊂Nb114O316}, one 81‐nuclear {Li3K⊂Nb81O225}, and one 52‐nuclear {H4Nb52O150}. The Nb nuclearity of these PONbs is remarkably larger than those of all known high‐nuclearity PONbs (≤32). Furthermore, the introduction of 3d Cu2+ ions can lead to the generation of extended inorganic–organic hybrid frameworks built from novel, high‐nuclearity, nanoscale heterometallic PONb building blocks {H3Cu3Nb78O222} or {H3Cu4(en)Nb78O222}. These building blocks also contain the largest number of Nb centers of any heterometallic PONbs reported to date. The synthesis of new‐type PONbs has long been a challenging subject in PONb chemistry.
A continuous method to prepare porous polystyrene membranes with high adsorption ability for polycyclic aromatic hydrocarbons
Authors: Li Yajie , Pu Hongting , Cheng Junfeng , Du Jiang , Pan Haiyan , Chang Zhihong 
Published: November 2017

ABSTRACTA convenient and continuous method to prepare porous polystyrene (PS) membranes via a microlayer coextrusion and template method is proposed. The porous PS membranes can be obtained via the acid etching of a CaCO3 template embedded in the membranes. Scanning electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy of the porous PS membranes show that most of the CaCO3 particles can be etched away. The effects of etching time, CaCO3 content, and membrane thickness on the porous structures are investigated, which can be used to regulate and control the porous structure. To demonstrate the adsorption performance of porous PS membranes on polycyclic aromatic hydrocarbons, pyrene is used as the model compound. Compared with that of solid PS membranes, porous PS membranes exhibit much higher adsorption performance for trace pyrene. The adsorption kinetics and isotherm of porous PS membranes can be well fit by pseudo‐second‐order kinetics and a Freundlich isotherm model. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45917.
Design of thermochromic polymer blends containing low‐mass compounds
Authors: Kuhakongkiat Nawaphorn , Sugiyama Mitsunari , Guesnier Mathieu , Azaman Farah Alwani , Yoshida Kento , Yamaguchi Masayuki 
Published: November 2017

ABSTRACTWe investigated the light transmittance of an immiscible polymer blend comprising a copolymer of ethylene and vinyl acetate (EVA) and a terpolymer of vinyl butyral, vinyl alcohol, and vinyl acetate (PVB). Both EVA and PVB are used in the interlayers of laminated glass. We found that the transparency of the blend depends on the ambient temperature. This can be attributed to the difference in the temperature dependence of the refractive index between EVA and PVB. The blend has good transparency at room temperature because the difference between the refractive indices of its components is minimal. At high or low temperatures, however, the blend becomes opaque owing to light scattering. The addition of a plasticizer favorably affects the temperature range over which the blend exhibits high transparency, because the refractive index and its temperature dependence are affected by the plasticizer. We also evaluated the interphase transfer of a plasticizer between EVA and PVB at various temperatures. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45927.
Ultrafiltration membranes based on hybrids of an amphiphilic graft copolymer and titanium isopropoxide
Authors: Park Min Su , Park Byeong Ju , Kim Na Un , Park Jung Tae , Kim Jong Hak 
Published: November 2017

ABSTRACTGraft copolymer poly(vinyl chloride)‐g‐poly(oxyethylene methacrylate) (PVC‐g‐POEM) is combined with titanium isopropoxide (TTIP) to form hybrids that undergo phase separation in a water bath. The water permeance of the PVC‐g‐POEM membrane increases by hybridization with TTIP owing to an increase in the surface pore size and porosity. Upon heating to 80 °C, the water permeances of PVC‐g‐POEM and PVC‐g‐POEM/TTIP decrease owing to the increased thickness of the top layer. However, the bovine serum albumin (BSA) rejection of PVC‐g‐POEM increases, while that of PVC‐g‐POEM/TTIP decreases. This is attributed to accelerated dissolution of TTIP at 80 °C, resulting in a large number of surface pores. The antifouling performance is significantly improved by TTIP addition and heating owing to increased hydrophilicity, as confirmed by contact angle, O/C atomic ratio, and water content measurements. The PVC‐g‐POEM/TTIP membrane prepared at 25 °C shows the best performance [338 L m−2 h−1 bar−1 (LMH) water permeance, 89.4% BSA rejection, and 91.9% flux ratio recovery]. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45932.
Comprehensive and quantitative study on the thermal oxidative stabilization reactions in poly(acrylonitrile‐co‐itaconic acid) copolymer
Authors: Fu Zhongyu , Liu Baijun , Li Bing , Liu Yuyao , Zhang Huixuan 
Published: November 2017

ABSTRACTThermal oxidative stabilization (TOS) reactions, mainly cyclization, oxygen uptake, dehydrogenation, crosslinking, and disproportionation termination of cyclization in poly(acrylonitrile‐co‐itaconic acid) (PAI), are tracked quantitatively by the combination of second‐derivative and cure‐fitting operations in the Fourier transform infrared spectroscopy spectra (FTIR) range of 1800–1000 cm−1 and 2300–2100 cm−1. Except the cyclization and disproportionation of cyclization are chemical‐reaction‐controlled process, the other three reactions are both diffusion‐controlled and chemical‐reaction‐controlled processes. The formation of free and conjugated carbonyl group need the optimal cyclization rate, adequate unreacted linear PAI chains, and appropriate oxidation ability coordinated. The higher temperature, the faster rate and the higher extent of the cyclization and the crosslinking reactions as well as the faster disproportionation termination of cyclization. The length of the formed cyclic structures became shorter as the evolution of TOS process, especially for 265 °C. The crosslinking, oxygen uptake, dehydrogenation, and termination of cyclization reactions become dominant with the proceeding of TOS process, especially as the cyclization extent above 0.8 and at high temperature such as 265 °C. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45934.
Singular Linear Quadratic Optimal Control Problem for Stochastic Nonregular Descriptor Systems
Authors: Wang Xin , Liu Bin 
Published: November 2017

AbstractThis paper is concerned with the singular linear quadratic (SLQ) optimal control problem for stochastic nonregular descriptor systems with time‐delay. By means of some reasonable assumptions and a series of equivalent transformations, the problem is finally transformed into a positive linear quadratic (LQ) problem for standard stochastic systems. Then dynamic programming principle is used to establish the solvability of the original problem, and the desired explicit presentation of the optimal controller is given in terms of matrix iterative form. The results due to Feng et al. are generalized and improved. As an application, a numerical example is presented to demonstrate the efficiency of the proposed approach.
Design of a software for calculating isoelectric point of a polypeptide according to their net charge using the graphical programming language LabVIEW
Authors: Tovar Glomen 
Published: November 2017

AbstractA software to calculate the net charge and to predict the isoelectric point (pI) of a polypeptide is developed in this work using the graphical programming language LabVIEW. Through this instrument the net charges of the ionizable residues of the polypeptide chains of the proteins are calculated at different pH values, tabulated, pI is predicted and an Excel (‐xls) type file is generated. In this work, the experimental values of the pIs (pI) of different proteins are compared with the values of the pIs (pI) calculated graphically, achieving a correlation coefficient (R) of 0.934746 which represents a good reliability for a p < 0.01. In this way the generated program can constitute an instrument applicable in the laboratory, facilitating the calculation to graduate students and junior researchers. © 2017 by The International Union of Biochemistry and Molecular Biology, 46(1):39–46, 2018.
Edu‐Cloud: On‐the‐fly employability skills as a service
Authors: Shahzadi Sonia , Iqbal Muddesar , Dagiuklas Tasos 
Published: November 2017

AbstractTwenty‐first century global job market competition requires Science, Technology, Engineering, and Mathematics (STEM) university curricula to support both state‐of‐the‐art technical and soft skills learning to improve graduate employment. This necessitates the transformation of the current teaching and learning methodology powered by a social and collaborative platform to provide a social co‐learning environment. This social co‐learning will provide students with opportunities for self‐enrichment while supporting their technical skills and hands‐on needs. The platform must also provide the required lab infrastructure for hands‐on experimentation. This paper proposes the design and implementation of a cloud based platform called Edu‐Cloud. The Edu‐Cloud has been designed to provide automated resource provisioning and perform on‐the‐fly deployment of scalable virtual network functions to stream multimedia content closer to the global learners. This would help to meet the specific learning needs of a group of global interconnected students with similar learning skills and abilities. The benchmarking performance results show that the proposed framework works efficiently while reducing primary network traffic by deploying resources closer to the users and support scalability for a global deployment scenario.
Toward a Novel Drug To Target the EGF–EGFR Interaction: Design of Metabolically Stable Bicyclic Peptides
Authors: Guardiola Salvador , Seco Jesús , Varese Monica , Díaz‐Lobo Mireia , García Jesús , Teixidó Meritxell , Nevola Laura , Giralt Ernest 
Published: November 2017

AbstractIn cancer, proliferation of malignant cells is driven by overactivation of growth‐signalling mechanisms, such as the epidermal growth factor receptor (EGFR) pathway. Despite its therapeutic relevance, the EGF–EGFR interaction has remained elusive to inhibition by synthetic molecules, mostly as a result of its large size and lack of binding pockets and cavities. Designed peptides, featuring cyclic motifs and other structural constraints, have the potential to modulate such challenging protein–protein interactions (PPIs). Herein, we present the structure‐based design of a series of bicyclic constrained peptides that mimic an interface domain of EGFR and inhibit the EGF–EGFR interaction by targeting the smaller partner (i.e., EGF). This design process was guided by the integrated use of in silico methods and biophysical techniques, such as NMR spectroscopy and surface acoustic wave. The best analogues were able to reduce selectively the viability of EGFR+ human cancer cells. In addition to their efficacy, these bicyclic peptides are endowed with exceptional stability and metabolic resistance—two features that make them suitable candidates for in vivo applications.
Anticoagulation with heparin The art of simplicity even in patients on dialysis
Authors: Belardi Jorge A. , Albertal Mariano 
Published: November 2017

Key Points

In current PCI practice, anticoagulation with either bivalirudin or unfractionated heparin in patients with ACS share comparable efficacy and safety.
Nonetheless, their individual performance in patients on dialysis remains unclear.
This observational PCI study reported in‐hospital clinical outcome in patients on dialysis undergoing PCI according to drug regimen: bivalirudin versus heparin.
Similar clinical outcome was observed with both drug regimens.
“To close or not to close?” When should vascular closure devices be used after cardiac catheterization procedures?
Authors: Shatila Wassim , Krajcer Zvonimir 
Published: November 2017

Key Points

Vascular closure devices (VCD) appear to be safe when compared to manual compression or surgical closure.
VCDs’ main advantage seems to stem from lower time to hemostasis (TTH) and time to mobilization.
In anticoagulated patients with 6‐Fr femoral sheaths, the new Celt ACT VCD, which uses a stainless‐steel permanent implant, seems to be safe and decreases TTH when compared to manual pressure.
Hemodynamic classification of paravalvular leakage after transcatheter aortic valve implantation compared with angiographic or echocardiographic classification for prediction of 1‐year mortality
Authors: Schoechlin Simon , Brennemann Tim , Allali Abdelhakim , Ruile Philip , Jander Nikolaus , Allgeier Martin , Gick Michael , Richardt Gert , Neumann Franz‐Josef , Abdel‐Wahab Mohamed 
Published: November 2017

AbstractObjectivesWe sought to assess angiographic, echocardiographic and hemodynamic grading of paravalvular leakage (PVL) after transcatheter aortic valve implantation (TAVI) with respect to prediction of 1‐year mortality.BackgroundMeaningful criteria for the severity of PVL are needed to allow intraprocedural guidance and patient management after TAVI.MethodsWe pooled the prospective TAVI databases of 2 German centers. During TAVI, PVL was assessed angiographically and by the aortic regurgitation index (ARI). ARI was calculated as ratio of the gradient between diastolic blood pressure and left ventricular end‐diastolic pressure to systolic blood pressure times hundred. In addition, we performed transthoracic echocardiography before discharge.ResultsA total of 723 patients undergoing TAVI with self‐expandable (20.9%) or balloon‐expandable (79.1%) valves were included. Grades of PVL as assessed during the procedure by angiography or ARI (below the previously defined cut‐off of 25) did not show a significant association with 1‐year mortality (P = 0.312 and 0.776, respectively). One‐year mortality was 15.7% (39/249) in patienths with an ARI < 25 and 16.5% (71/430) in patients with an ARI ≥ 25. Echocardiographic classes of PVL at discharge showed a significant (P = 0.029) association with 1‐year mortality, which was 11.5% (37/322) in patients with no/trace PVL, 18.0% (62/345) in patients with mild PVL and 23.1% (6/26) in patients with more than mild PVL. These findings prevailed after multivariable adjustment.ConclusionsARI did not help identify PVLs that are relevant to 1‐year survival. Angiographic assessment during the procedure was less predictive than echocardiographic assessment before discharge.
Transverse partial stent ablation with rotational atherectomy for suboptimal culotte technique in left main stem bifurcation
Authors: De Maria Giovanni Luigi , Kharbanda Rajesh , Banning Adrian P. 
Published: November 2017

AbstractLongitudinal rotational atherectomy of metal struts is well described as bail‐out strategy to treat undilatable instent restenosis. Ablation of metal stent struts jailing the ostium of a major side branch in a coronary bifurcation is not described. In the current report, we describe a case of “transverse” rotational atherectomy to treat a failure of culotte stenting in a left main stem bifurcation. We document for the first time in vivo and in man the effect of this strategy using optical coherence tomography.
Ferrocene as a Privileged Framework for Chiral Organocatalysts
Authors: Zhu Jun‐Chao , Cui Dong‐Xiao , Li Yue‐Dan , Jiang Ru , Chen Wei‐Ping , Wang Ping‐An 
Published: November 2017

AbstractFerrocene (Fc) as a privileged framework for chiral organocatalysts (Orgcat) has been developed rapidly in recent years. Herein, five categories have been summarized, including Fc‐based nucleophilic, bifunctional, Brønsted acid, hydrogen‐bonding organocatalysts and Fc‐based frustrated Lewis pairs. Their applications in enantioselective transformations were also highlighted and discussed in this Minireview.
VUV/Vis Photoluminescence, Site Occupancy, and Thermal‐Resistance Properties of K4SrSi3O9:Ce3+
Authors: He Jin , Guo Xiaoxuan , Chen Yibo , Shi Rui , Huang Yan , Zhang Jing , Wang Yufei , Liu Zhao‐Qing 
Published: November 2017

AbstractA series of Ce3+‐activated K4SrSi3O9 materials emitting bright blue light under near‐UV excitation was obtained by a facile solid‐state reaction. The luminescence of Ce3+‐doped K4SrSi3O9 shows excellent thermal stability in a large temperature range. The detailed temperature/concentration‐dependent luminescent properties of Ce3+ confirm that there are two different Ce3+ sites in K4SrSi3O9:Ce3+, and energy transfer from the high‐energy Ce(1)3+ sites to the low‐energy Ce(2)3+ sites was demonstrated to occur by electric dipole–dipole interaction. The maximum photoluminescence quantum yield of Ce3+‐doped K4SrSi3O9 can reach 56 %, and a UV‐excited white LED device with low correlated color temperature (CCT=4617 K) and high color‐rendering index (Ra=80) was fabricated with K4SrSi3O9:Ce3+.
Iron‐Catalyzed Hydroborylative Cyclization of 1,6‐Enynes
Authors: Cabrera‐Lobera Natalia , Rodríguez‐Salamanca Patricia , Nieto‐Carmona Juan C. , Buñuel Elena , Cárdenas Diego J. 
Published: November 2017

AbstractWe report first Fe‐catalyzed hydroborylative cyclization reaction. The process provides one C−C and one C−B bond in a single operation and shows a wide scope, allowing the formation of carbo‐ and heterocycles containing a homoallylic boryl unit that can be further functionalized. The reaction takes place in smooth conditions, with inexpensive catalytic system and full atom economy since HBpin is the borylation agent, in contrast to our previously reported Pd‐catalyzed reaction. Both aryl and alkyl substituted alkynes are reactive, revealing a wide reaction scope. Mechanistic studies suggest the intermediacy of FeII‐hydride active catalyst capable to react with the alkyne group prior to alkene insertion, and computational studies suggest the occurrence of barrierless σ‐bond metathesis involving HBpin and Fe−C bonds along the catalytic cycle.