bluuebunny/crossref_metadata_2025_split huggingface dataset:
Optothermoplasmonic Nanolithography for On‐Demand Patterning of 2D Materials
Authors: Lin Linhan , Li Jingang , Li Wei , Yogeesh Maruthi N. , Shi Jianjian , Peng Xiaolei , Liu Yaoran , Rajeeva Bharath Bangalore , Becker Michael F. , Liu Yuanyue , Akinwande Deji , Zheng Yuebing 
Published: August 2018

AbstractSince the first discovery of graphene, 2D materials are drawing tremendous attention due to their atomic thickness and superior properties. Fabrication of high‐quality micro‐/nanopatterns of 2D materials is essential for their applications in both nanoelectronics and nanophotonics. In this work, an all‐optical lithographic technique, optothermoplasmonic nanolithography (OTNL), is developed to achieve high‐throughput, versatile, and maskless patterning of different atomic layers. Low‐power (≈5 mW µm−2) and high‐resolution patterning of both graphene and MoS2 monolayers is demonstrated through exploiting thermal oxidation and sublimation at the highly localized thermoplasmonic hotspots. Density functional theory simulations reveal that Au nanoparticles reduce the formation energy (≈0.6 eV) of C monovacancies through bonding between undercoordinated C and Au, leading to a significant Au‐catalyzed graphene oxidation and a reduction of the required laser operation power. Programmable patterning of 2D materials into complex and large‐scale nanostructures is further demonstrated. With its low‐power, high‐resolution, and versatile patterning capability, OTNL offers the possibility to scale up the fabrication of nanostructured 2D materials for many applications in photonic and electronic devices.
Allochroic‐Graphene Oxide Linked 3D Oriented Surface Imprinting Strategy for Glycoproteins Assays
Authors: Chen Guosheng , Kou Xiaoxue , Huang Siming , Huang Shuyao , Zhang Rui , Liu Chao , Shen Jun , Zhu Fang , Ouyang Gangfeng 
Published: August 2018

AbstractAffordable methodologies for screening of disease‐related biomarkers are vital for early clinical diagnosis, and can potentially improve the survival rate. Herein, a cost‐efficient and easy‐to‐use approach, called allochroic‐graphene oxide linked oriented surface imprinting strategy (AGO‐OSI), is imparted for rapid glycoproteins screening with naked eyes. The novel detection principle herein relies on the boronate‐affinity sandwich‐like assembly, in which the target glycoproteins are specifically captured by the engineered 3D oriented surface imprinting magnetic microprobe, and followed by labeling with the pH‐triggered allochroic‐graphene oxide. Compared with the enzyme‐linked immunosorbent assay, no antibody‐assisted recognition or complicated enzymatic labeling is required, endowing the AGO‐OSI with the merits of low‐cost, labor‐saving, and user‐friendly. In addition, the pH‐triggered allochroic‐graphene oxide provides a simple, real‐time, and economical signal readout, without the sophisticated instruments requirement. Finally, it is successfully applied to rapid diagnosis of α‐fetoprotein (AFP) in liver cancer event with naked eyes, further manifesting the superiority of AGO‐OSI. It is believed that the cost‐efficient and easy‐to‐use strategy proposed herein can potentially be a versatile tool for point‐of‐care diagnosis, especially applicable in resource‐constrained regions.
Wrinkled Rh2P Nanosheets as Superior pH‐Universal Electrocatalysts for Hydrogen Evolution Catalysis
Authors: Wang Kai , Huang Bolong , Lin Fei , Lv Fan , Luo Minchuan , Zhou Peng , Liu Qiao , Zhang Weiyu , Yang Chao , Tang Yonghua , Yang Yong , Wang Wei , Wang Hao , Guo Shaojun 
Published: August 2018

AbstractSearching for highly efficient and durable electrocatalysts for the hydrogen evolution reaction (HER) that function effectively at all pHs is of great interest to the scientific community, however it is still a grand challenge, because the HER kinetics of Pt in alkaline solutions are approximately two to three orders of magnitude lower than that in acidic solution. Herein, a new class of wrinkled, ultrathin Rh2P nanosheets for enhancing HER catalysis at all pHs is reported. They exhibit a small overpotential of 18.3 mV at 10 mA cm−2, low Tafel slope of 61.5 mV dec−1, and good durability in alkaline media, much better than the commercial Pt/C catalyst. Density functional theory calculations reveal that the active open‐shell effect from the P‐3p band not only promotes Rh‐4d for increased proton–electron charge exchange but also provides excellent p–p overlapping to locate the O‐related species as distributary center, which can benefit the HER process in alkaline media. It is also demonstrated that the present wrinkled, ultrathin Rh2P nanosheets are highly efficient and durable electrocatalysts toward HER in both acid and neutral electrolytes. The present work opens a new material design for ultrathin 2D metal phosphide nanostructures for the purpose of boosting HER performance at all pHs.
Evaluating an owner‐to‐worker training intervention in California nail salons using personal air monitoring
Authors: Quach Thu , Von Behren Julie , Nelson David O. , Nguyen Tuan N. , Tsoh Janice , Le Minhthu , Fu Lisa , Beckman Stella , Reynolds Peggy 
Published: August 2018

BackgroundChemicals in nail products have been linked to numerous health concerns.MethodsWe recruited Vietnamese‐American nail salon owners and workers in California and randomized salons into an intervention or control group. Owners in the intervention group received training and then provided education to workers in their salons on best practices to reduce workplace chemical exposures. Methyl methacrylate (MMA), toluene, and total volatile organic compounds (TVOCs) were measured using personal air monitors worn by workers during the work‐shift.ResultsWe enrolled 77 salons (37 intervention and 40 control) and 200 workers. There was no significant intervention effect between the two groups. However, MMA and TVOCs were higher for workers who used gel polish and acrylic nails as well as in busy salons.ConclusionsAlthough the intervention did not show reductions in chemical levels, identifying worker tasks and salon characteristics that predict chemical levels can inform future interventions to reduce exposures.
Tethered hydrophilic polymers layers on a polyamide surface
Authors: Moses (Varin) Kari J. , Kim Soomin , Bilal Muhammad , Cohen Yoram 
Published: August 2018

ABSTRACTModification of the hydrophilicity of a polyamide surface with tethered poly(acrylic acid), poly(vinylsulfonic acid), or poly(2‐hydroxyethyl methacrylate) was accomplished by atmospheric pressure plasma surface activation, followed by free radical graft polymerization with vinyl monomers. Surface activation was more effective with He relative to H2 plasma leading to thicker grafted polymer layers of higher surface density. The thickness and surface roughness of the tethered layers were up to ~9.7 nm and ~3.6 nm, respectively. Upon surface modification, the free energy of hydration decreased (25–51%) and the polar component of the surface energy increased (by a factor of 3.0–6.5); the above indicating increased hydrophilicity of the modified surface which also correlated with the tethered polymer layer thickness and surface roughness. The present study suggests that surface hydrophilicity tuning is feasible through the combination of surface chemistry, plasma surface treatment, and graft polymerization conditions. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46843.
Thickness‐dependent microstructural and electromechanical properties in polyurethane films obtained by polymer solution casting
Authors: Wongtimnoi K. , Cavaillé J.‐Y. , Chenal J.‐M. , Guiffard B. , Bogner A. , Seveyrat L. 
Published: August 2018

ABSTRACTElectroactive polymers (EAPs) are promising materials for actuation and energy harvesting applications. Among the EAPs, polyurethane (PU) material is of considerable interest given its high values of deformation under an electric field. The electromechanical properties were found to be dependent on the processing technique and the thickness of the film. To understand this relationship, a comprehensive study was carried out on polyether‐based thermoplastic PU elastomer films elaborated by solution casting with thicknesses between 12 and 220 μm. Microstructural, dielectric, mechanical, and electrostriction studies were conducted. Thin films present a lower strain for a given electric field compared to thick films. The films exhibit a structural gradient along the thickness direction: a fast evaporation in the upper part of the film close to the interface with air inhibits the phase separation but a more favored one in the lower part. This is consistent with the modeling based on the gradient of dielectric constant and the experimental, mechanical, and dielectric characterizations. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 46981.
The use of a surface active agent in the protection of a fusion protein during bioprocessing
Authors: Blas Peter , Tolner Berend , Ward John , Chester Kerry , Hoare Mike 
Published: August 2018

AbstractThe bioprocessing of a fusion protein is characterised by low yields and at a series of recovery and purification stages that leads to an overall 90% loss. Much of this apparent loss is due to the denaturation of a protein, missing a vital affinity ligand. However, there is evidence of the protection of degradation products which occurs in the presence of shear plus air/liquid interfaces. This study seeks out to characterise the loss and use ultra‐scale‐down studies to predict its occurrence and hence shows these may be diminished by the use of protective reagents such as Pluronic F68.
Structural and Mutagenesis Studies of the Thiamine‐Dependent, Ketone‐Accepting YerE from Pseudomonas protegens
Authors: Hampel Sabrina , Steitz Jan‐Patrick , Baierl Anna , Lehwald Patrizia , Wiesli Luzia , Richter Michael , Fries Alexander , Pohl Martina , Schneider Gunter , Dobritzsch Doreen , Müller Michael 
Published: August 2018

AbstractA wide range of thiamine diphosphate (ThDP)‐dependent enzymes catalyze the benzoin‐type carboligation of pyruvate with aldehydes. A few ThDP‐dependent enzymes, such as YerE from Yersinia pseudotuberculosis (YpYerE), are known to accept ketones as acceptor substrates. Catalysis by YpYerE gives access to chiral tertiary alcohols, a group of products difficult to obtain in an enantioenriched form by other means. Hence, knowledge of the three‐dimensional structure of the enzyme is crucial to identify structure–activity relationships. However, YpYerE has yet to be crystallized, despite several attempts. Herein, we show that a homologue of YpYerE, namely, PpYerE from Pseudomonas protegens (59 % amino acid identity), displays similar catalytic activity: benzaldehyde and its derivatives as well as ketones are converted into chiral 2‐hydroxy ketones by using pyruvate as a donor. To enable comparison of aldehyde‐ and ketone‐accepting enzymes and to guide site‐directed mutagenesis studies, PpYerE was crystallized and its structure was determined to a resolution of 1.55 Å.
Tyramine Functionalized Graphene: Metal‐Free Electrochemical Non‐Enzymatic Biosensing of Hydrogen Peroxide
Authors: Sapner Vijay S. , Chavan Parag P. , Digraskar Renuka V. , Narwade Shankar S. , Mulik Balaji B. , Mali Shivsharan M. , Sathe Bhaskar R. 
Published: August 2018

AbstractWe report here non‐enzymatic electrochemical biosensing of H2O2 using a highly stable, metal‐free, tyramine functionalized graphene (T‐GO) based electrocatalytic system. The surface functionalization of tyramine on graphene was carried out chemically. The obtained sheets were characterized by scanning electron microscopy (SEM), X‐ray diffraction (XRD) as well as X‐ray photoelectron (XP), Raman, FT‐IR and UV‐visible spectroscopy. More significantly, the combined results from morphological and structural studies show the formation of a few layers of graphene with effective large‐scale functionalization by tyramine. As a metal‐free electrocatalyst, the as‐synthesized T‐GO shown good electrocatalytic activity towards reduction of H2O2 with a sensitivity of 0.105 mM/cm2 confirmed by combined results from cyclic voltammetric (CV) and linear sweep voltammetric (LSV), and amperometric (i–t) measurements. The lower onset potential (−0.23 mV vs SCE), lower detection limit, wider concentration range (10 mM to 60 mM) with higher electrochemical current and potential stability demonstrated the potential of our non‐enzymatic and cost‐effective T‐GO based electrocatalytic system towards reduction of hydrogen peroxide.
Rational Design of Supramolecular Dynamic Protein Assemblies by Using a Micelle‐Assisted Activity‐Based Protein‐Labeling Technology
Authors: Sandanaraj Britto S. , Reddy Mullapudi Mohan , Bhandari Pavankumar Janardhan , Kumar Sugam , Aswal Vinod K. 
Published: August 2018

AbstractThe self‐assembly of proteins into higher‐order superstructures is ubiquitous in biological systems. Genetic methods comprising both computational and rational design strategies are emerging as powerful methods for the design of synthetic protein complexes with high accuracy and fidelity. Although useful, most of the reported protein complexes lack a dynamic behavior, which may limit their potential applications. On the contrary, protein engineering by using chemical strategies offers excellent possibilities for the design of protein complexes with stimuli‐responsive functions and adaptive behavior. However, designs based on chemical strategies are not accurate and therefore, yield polydisperse samples that are difficult to characterize. Here, we describe simple design principles for the construction of protein complexes through a supramolecular chemical strategy. A micelle‐assisted activity‐based protein‐labeling technology has been developed to synthesize libraries of facially amphiphilic synthetic proteins, which self‐assemble to form protein complexes through hydrophobic interaction. The proposed methodology is amenable for the synthesis of protein complex libraries with molecular weights and dimensions comparable to naturally occurring protein cages. The designed protein complexes display a rich structural diversity, oligomeric states, sizes, and surface charges that can be engineered through the macromolecular design. The broad utility of this method is demonstrated by the design of most sophisticated stimuli‐responsive systems that can be programmed to assemble/disassemble in a reversible/irreversible fashion by using the pH or light as trigger.
Surface Modification on Pd‐TiO2 Hybrid Nanostructures towards Highly Efficient H2 Production from Catalytic Formic Acid Decomposition
Authors: Liu Panyiming , Cai Zijian , You Yang , Huang Hao , Chen Shuangming , Gao Chao , Qi Zeming , Long Ran , Zhu Junfa , Song Li , Xiong Yujie 
Published: August 2018

AbstractMetal‐containing nanocrystals with well‐designed surface structures represent a class of model systems for revealing the fundamental physical and chemical processes involved in heterogeneous catalysis. Herein it is shown how surface modification can be utilized as an efficient strategy for controlling the surface electronic state of catalysts and, thus, for tuning their catalytic activity. As model catalysts, the Pd‐tetrahedron–TiO2 nanostructures, modified on the surface with different foreign atoms, showed a varied activity in the catalytic decomposition of formic acid towards H2 production. The catalytic activity increases with a reduction in the work function of modified atoms; this reduction can be well explained by a surface polarization mechanism. In this hybrid system, the difference in the work functions of Pd and modified atoms results in surface polarization on the Pd surface and, thus, in the tuning of its charge state. Together with the Schottky junction between TiO2 and metals, the tuned charge state enables the promotion of catalytic efficiency in the catalytic decomposition of formic acid to H2 and CO2.
Contrasting Synergistic Heterobimetallic (Na–Mg) and Homometallic (Na or Mg) Bases in Metallation Reactions of Dialkylphenylphosphines and Dialkylanilines: Lateral versus Ring Selectivities
Authors: Stevens Michael A. , Hashim Fairuz H. , Gwee Eunice S. H. , Izgorodina Ekaterina I. , Mulvey Robert E. , Blair Victoria L. 
Published: August 2018

AbstractA series of dialkylphenylphosphines and their analogous aniline substrates have been metallated with the synergistic mixed‐metal base [(TMEDA)Na(TMP)(CH2SiMe3)Mg(TMP)] 1. Different metallation regioselectivities for the substrates were observed, with predominately lateral or meta‐magnesiated products isolated from solution. Three novel heterobimetallic complexes [(TMEDA)Na(TMP)(CH2PCH3Ph)Mg(TMP)] 2, [(TMEDA)Na(TMP)(m‐C6H4PiPr2)Mg(TMP)] 3 and [(TMEDA)Na(TMP)(m‐C6H4NEt2)Mg(TMP)]  4 and two homometallic complexes [{(TMEDA)Na(EtNC6H5)}2] 5 and [(TMEDA)Na2(TMP)(C6H5PEt)]2 6 derived from homometallic metallation have been crystallographically characterised. Complex 6 is an unprecedented sodium‐amide, sodium‐phosphide hybrid with a rare (NaNNaP)2 ladder motif. These products reveal contrasting heterobimetallic deprotonation with homometallic induced ethene elimination reactivity. Solution studies of metallation mixtures and electrophilic iodine quenching reactions confirmed the metallation sites. In an attempt to rationalise the regioselectivity of the magnesiation reactions the C−H acidities of the six substrates were determined in THF solution using DFT calculations employing the M06‐2X functional and cc‐pVTZ Dunning's basis set.
Back Cover: Asymmetric Synthesis of the Ring A Substructure of Genkwadane A (Chin. J. Chem. 9/2018)
Authors: Feng Jing , Yin Hongli , Man Yi , Fu Shaomin , Liu Bo 
Published: August 2018

The back cover picture shows Genkwadane A was isolated from the flower buds of Daphne genkwa which shows bioactivity against HeLa, HepG2, HT‐1080, MCF‐7, A549, U‐937, K562 and HL60 cell lines. It is the first time that a daphnane diterpenoid bearing a 1,10‐double bond was isolated. In this paper, B. Liu and co‐workers report asymmetric synthesis of the ring A substructure of genkwadane A in 10 steps from D‐tartrate derivative. More details are discussed in the article by Liu et al. on page 831–836.
image
Optimal design of fractional delay FIR filter using cuckoo search algorithm
Authors: Kumar Manjeet 
Published: August 2018

SummaryThe conventional gradient‐based optimization methods are not sufficient to optimize nonlinear, multimodal, and nonuniform objective functions of fractional delay FIR (FD‐FIR) filters, and the objective function cannot converge to the global minimum solution. So a population‐based meta‐heuristic optimization algorithm called as cuckoo search algorithm (CSA) has been implemented in the design of optimal FD‐FIR filter. Cuckoo search algorithm is based on lifestyle and unique parasitic behavior in egg laying and breeding of some cuckoo species along with Lévy flight behavior of some birds and fruit flies. To attain a balance between exploration and exploitation in the search space, different set of control parameters is tested by simulation. Extensive simulations were performed to ensure how CSA exploits in the design of optimal FD‐FIR filter. A quantitative assessment of the proposed CSA‐based method is accomplished using several performance metric such as magnitude error, convergence rate, and optimal solution. The simulation results reveal the advantages of the proposed FD filter using CSA compared with the FD filter designed using evolutionary algorithm like genetic algorithm and conventional FD filter design methods such as Lagrange, discrete Hartley transform, discrete Fourier transform, discrete cosine transform, and radial basis function methods.
Altered gray matter volumes in language‐associated regions in children with developmental language disorder and speech sound disorder
Authors: Kurth Florian , Luders Eileen , Pigdon Lauren , Conti‐Ramsden Gina , Reilly Sheena , Morgan Angela T. 
Published: August 2018

AbstractDevelopmental language disorder (DLD) and speech sound disorder (SSD) are common, and although scientific evidence for structural and functional alterations in DLD/SSD is accumulating, current neuroimaging studies provide an incongruent picture. Here, we hypothesized that children affected by DLD and SSD present with gray matter (or gray matter asymmetry) aberrations in brain areas associated with language processing compared to typically developing (TD) children. To assess this hypothesis, we enhanced MRI‐based information with microscopically defined cytoarchitectonic probabilities of Broca’s area (BA 45, BA 44) as well as an auditory area (TE 3.0). We detected a larger rightward gray matter asymmetry in BA 45 in children with DLD (n = 13) and with SSD (n = 18) compared to TD children (n = 18), albeit only on a trend level. Interestingly though, we observed significantly larger gray matter volumes in right BA 45 in DLD compared to SSD children (and also compared to TD children).
Social anxiety and eating disorder comorbidity and underlying vulnerabilities: Using network analysis to conceptualize comorbidity
Authors: Levinson Cheri A. , Brosof Leigh C. , Vanzhula Irina , Christian Caroline , Jones Payton , Rodebaugh Thomas L. , Langer Julia K. , White Emily K. , Warren Cortney , Weeks Justin W. , Menatti Andrew , Lim Michelle H. , Fernandez Katya C. 
Published: August 2018

AbstractObjectiveEating disorders (EDs) and social anxiety disorder (SAD) are highly co‐occurring. This comorbidity is extremely relevant, given that individuals with comorbid ED‐SAD are less likely to seek and/or benefit from ED treatment.MethodWe used network analysis to conceptualize ED‐SAD comorbidity in a sample of 2,215 participants with a primary diagnosis of ED, SAD, or no known diagnosis. We used novel network analyses methods to select symptoms for our models, identify potential illness pathways (i.e., bridge symptoms) between disorders and underlying vulnerabilities (e.g., perfectionism, social appearance anxiety), and to compare across sample types (e.g., clinical vs. nonclinical). We also tested several novel network analyses methods aimed at the following methodological concerns: (a) topological concerns (i.e., which items should be included in NA models), (b) how to use empirical indices to quantify bridge symptoms and (c) what differences in networks across samples mean.ResultsWe found that difficulty with drinking beverages and eating in public were bridge symptoms between ED and SAD. We also found that feeling nervous about one's appearance was a bridge symptom.ConclusionsWe identified public eating and drinking as bridge symptoms between EDs and SAD. Future research is needed to test if interventions focused on public eating and drinking might decrease symptoms of both EDs and SAD. Researchers can use this study (code provided) as an exemplar for how to use network analysis, as well as to use network analysis to conceptualize ED comorbidity and compare network structure and density across samples.