bluuebunny/crossref_metadata_2025 huggingface dataset:
Population dynamics of multiple triplet excitons revealed from time-dependent fluorescence quenching of single conjugated polymer chains
Authors: Datko Benjamin D. , Grey John K.
Published: January 2019

The advent of multiple exciton harvesting schemes and prolonging exciton lifetimes to improve performance attributes of solar cells based on conjugated organic materials presents some interesting challenges that must be overcome in order to realize the full potential of these strategies. This is especially important for applications involving multi-chromophoric conjugated polymers where interactions between multiple spin-forbidden triplet excitons can be significant and are mediated by chain conformation. We use single molecule spectroscopic techniques to investigate interactions between multiple triplet excitons and emissive singlets by monitoring time-dependent fluorescence quenching on time scales commensurate with the triplet lifetime. Structurally related conjugated polymers differing by heteroatom substitution were targeted and we use a stochastic photodynamic model to numerically simulate the evolution of multi-exciton populations following photoexcitation. Single chains of poly(3-hexylthiophene) (P3HT) exhibit longer-lived triplet dynamics and larger steady-state triplet occupancies compared to those of poly(3-hexylselenophene) (P3HS), which has a larger reported triplet yield. Triplet populations evolve and relax much faster in P3HS which only becomes evident when considering all kinetic factors governing exciton population dynamics. Overall, we uncover new guidelines for effectively managing multi-exciton populations and interactions in conjugated polymers and improving their light harvesting efficiency.
Detecting sequences of system states in temporal networks
Authors: Masuda Naoki , Holme Petter
Published: January 2019

Many time-evolving systems in nature, society and technology leave traces of the interactions within them. These interactions form temporal networks that reflect the states of the systems. In this work, we pursue a coarse-grained description of these systems by proposing a method to assign discrete states to the systems and inferring the sequence of such states from the data. Such states could, for example, correspond to a mental state (as inferred from neuroimaging data) or the operational state of an organization (as inferred by interpersonal communication). Our method combines a graph distance measure and hierarchical clustering. Using several empirical data sets of social temporal networks, we show that our method is capable of inferring the system’s states such as distinct activities in a school and a weekday state as opposed to a weekend state. We expect the methods to be equally useful in other settings such as temporally varying protein interactions, ecological interspecific interactions, functional connectivity in the brain and adaptive social networks.
Plasma coenzyme Q10 status is impaired in selected genetic conditions
Authors: Montero Raquel , Yubero Delia , Salgado Maria C. , González María Julieta , Campistol Jaume , O’Callaghan Maria del Mar , Pineda Mercè , Delgadillo Verónica , Maynou Joan , Fernandez Guerau , Montoya Julio , Ruiz-Pesini Eduardo , Meavilla Silvia , Neergheen Viruna , García-Cazorla Angels , Navas Placido , Hargreaves Iain , Artuch Rafael
Published: January 2019

Identifying diseases displaying chronic low plasma Coenzyme Q10 (CoQ) values may be important to prevent possible cardiovascular dysfunction. The aim of this study was to retrospectively evaluate plasma CoQ concentrations in a large cohort of pediatric and young adult patients. We evaluated plasma CoQ values in 597 individuals (age range 1 month to 43 years, average 11 years), studied during the period 2005–2016. Patients were classified into 6 different groups: control group of healthy participants, phenylketonuric patients (PKU), patients with mucopolysaccharidoses (MPS), patients with other inborn errors of metabolism (IEM), patients with neurogenetic diseases, and individuals with neurological diseases with no genetic diagnosis. Plasma total CoQ was measured by reverse-phase high-performance liquid chromatography with electrochemical detection and ultraviolet detection at 275 nm. ANOVA with Bonferroni correction showed that plasma CoQ values were significantly lower in the PKU and MPS groups than in controls and neurological patients. The IEM group showed intermediate values that were not significantly different from those of the controls. In PKU patients, the Chi-Square test showed a significant association between having low plasma CoQ values and being classic PKU patients. The percentage of neurogenetic and other neurological patients with low CoQ values was low (below 8%). In conclusión, plasma CoQ monitoring in selected groups of patients with different IEM (especially in PKU and MPS patients, but also in IEM under protein-restricted diets) seems advisable to prevent the possibility of a chronic blood CoQ suboptimal status in such groups of patients.
Data-Driven Subtyping of Parkinson’s Disease Using Longitudinal Clinical Records: A Cohort Study
Authors: Zhang Xi , Chou Jingyuan , Liang Jian , Xiao Cao , Zhao Yize , Sarva Harini , Henchcliffe Claire , Wang Fei
Published: January 2019

Parkinson’s disease (PD) is associated with diverse clinical manifestations including motor and non-motor signs and symptoms, and emerging biomarkers. We aimed to reveal the heterogeneity of PD to define subtypes and their progression rates using an automated deep learning algorithm on the top of longitudinal clinical records. This study utilizes the data collected from the Parkinson’s Progression Markers Initiative (PPMI), which is a longitudinal cohort study of patients with newly diagnosed Parkinson’s disease. Clinical information including motor and non-motor assessments, biospecimen examinations, and neuroimaging results were used for identification of PD subtypes. A deep learning algorithm, Long-Short Term Memory (LSTM), was used to represent each patient as a multi-dimensional time series for subtype identification. Both visualization and statistical analysis were performed for analyzing the obtained PD subtypes. As a result, 466 patients with idiopathic PD were investigated and three subtypes were identified. Subtype I (Mild Baseline, Moderate Motor Progression) is comprised of 43.1% of the participants, with average age 58.79 ± 9.53 years, and was characterized by moderate functional decay in motor ability but stable cognitive ability. Subtype II (Moderate Baseline, Mild Progression) is comprised of 22.9% of the participants, with average age 61.93 ± 6.56 years, and was characterized by mild functional decay in both motor and non-motor symptoms. Subtype III (Severe Baseline, Rapid Progression) is comprised 33.9% of the patients, with average age 65.32 ± 8.86 years, and was characterized by rapid progression of both motor and non-motor symptoms. These subtypes suggest that when comprehensive clinical and biomarker data are incorporated into a deep learning algorithm, the disease progression rates do not necessarily associate with baseline severities, and the progression rate of non-motor symptoms is not necessarily correlated with the progression rate of motor symptoms.
Historical contingency and productivity effects on food-chain length
Authors: Doi Hideyuki , Hillebrand Helmut
Published: January 2019

Food-chain length (FCL) is a fundamental ecosystem attribute, integrating information on both food web composition and ecosystem processes. It remains untested whether FCL also reflects the history of community assembly known to affect community composition and ecosystem functioning. Here, we performed microcosm experiments with a copepod (top predator), two ciliate species (intermediate consumers), and bacteria (producers), and modified the sequence of species introduction into the microcosm at four productivity levels to jointly test the effects of historical contingency and productivity on FCL. FCL increased when the top predator was introduced last; thus, the trophic position of the copepod reflected assembly history. A shorter FCL occurred at the highest productivity level, probably because the predator switched to feeding at the lower trophic levels because of the abundant basal resource. Thus, we present empirical evidence that FCL was determined by historical contingency, likely caused by priority effects, and by productivity.
A visual illusion that influences perception and action through the dorsal pathway
Authors: de la Malla Cristina , Brenner Eli , de Haan Edward H. F. , Smeets Jeroen B. J.
Published: January 2019

There are two main anatomically and physiologically defined visual pathways connecting the primary visual cortex with higher visual areas: the ventral and the dorsal pathway. The influential two-visual-systems hypothesis postulates that visual attributes are analyzed differently for different functions: in the dorsal pathway visual information is analyzed to guide actions, whereas in the ventral pathway visual information is analyzed for perceptual judgments. We here show that a person who cannot identify objects due to an extensive bilateral ventral brain lesion is able to judge the velocity at which an object moves. Moreover, both his velocity judgements and his interceptive actions are as susceptible to a motion illusion as those of people without brain lesions. These findings speak in favor of the idea that dorsal structures process information about attributes such as velocity, irrespective of whether such information is used for perceptual judgments or to guide actions.
A brand-new generation of fluorescent nano-neural tracers: biotinylated dextran amine conjugated carbonized polymer dots
Authors: Liu Yang , Liu Junjun , Zhang Jiayi , Li Xiucun , Lin Fangsiyu , Zhou Nan , Yang Bai , Lu Laijin
Published: January 2019

We develop a novel fluorescent nano-neural tracer: BDA–CPDs, which can be anterogradely transported within the peripheral nervous system of rats.
La-Doped mesoporous calcium silicate/chitosan scaffolds for bone tissue engineering
Authors: Peng Xiao-Yuan , Hu Min , Liao Fang , Yang Fan , Ke Qin-Fei , Guo Ya-Ping , Zhu Zhen-Hong
Published: January 2019

La-MCS/CTS scaffolds promoted the proliferation and osteogenic differentiation of rBMSCs in vitro and bone regeneration in vivo.
In situ evolution of the active phase on stainless steel mesh toward a cost-effective bifunctional electrode for energy storage and conversion
Authors: Xiao Kang , Xiao Tai-Quan , Zhang Yirong , Xie Jingxin , Cao Meizhi , Li Nan , Ouyang Ting , Liu Zhao-Qing
Published: January 2019

A facile and scalable approach to directly boost the electrocatalytic hydrogen evolution and energy storage capabilities of commercial stainless steel mesh.
Enhanced photocatalytic activity of BiVO4 coupled with iron-based complexes for water oxidation under visible light irradiation
Authors: Liang Xiangming , Lin Junqi , Cao Xiaohu , Sun Wanjun , Yang Junyi , Ma Baochun , Ding Yong
Published: January 2019

Four iron complexes were used as pre-catalysts in BiVO4–NaIO3 photocatalytic water oxidation systems. The best-performing system afforded a rather high oxygen yield and apparent quantum efficiency yield of 99.1% and 44.3%, respectively.
A bio-inspired, one-step but versatile coating onto various substrates with strong antibacterial and enhanced osteogenesis
Authors: Yang Shuoshuo , Xu Yongpeng , Lin Quankui , Bai Yu , Zan Xingjie , Ye Qingsong
Published: January 2019

Inspired by mussels, we reported a one-step but versatile method to fabricate a biocompatible and antibacterial coating.
MOF-derived microstructural interconnected network porous Mn2O3/C as negative electrode material for asymmetric supercapacitor device
Authors: Nagamuthu Sadayappan , Ryu Kwang-Sun
Published: January 2019

A metal–organic framework is employed for the preparation of an interconnected network porous structure of Mn2O3/carbon for supercapacitor applications.
Imidazoporphyrins as supramolecular tectons: synthesis and self-assembly of zinc 2-(4-pyridyl)-1H-imidazo[4,5-b]porphyrinate
Authors: Abdulaeva Inna A. , Birin Kirill P. , Sinelshchikova Anna A. , Grigoriev Mikhail S. , Lyssenko Konstantin A. , Gorbunova Yulia G. , Tsivadze Aslan Yu. , Bessmertnykh-Lemeune Alla
Published: January 2019

First evidence of self-assembling of imidazoporphyrins is revealed with the example of zinc(ii) 5,10,15,20-tetramesityl-2-(4-pyridyl)-1H-imidazo[4,5-b]porphyrin in the solid state and in solution.
Li2Na2[B12O19(OH)2]: a new open framework borate with a pcu-type net constructed from large cyclic dodeca-oxoboron units
Authors: Han Bei-Bei , Cheng Jian-Wen , Yang Guo-Yu
Published: January 2019

A new open-framework borate with a pcu-type net has been made under solvothermal conditions by incorporating large cyclic dodeca-oxoboron clusters.
Controlling ionic conductivity through transprotein electropores in human aquaporin 4: a non-equilibrium molecular-dynamics study
Authors: Bernardi Mario , Marracino Paolo , Liberti Micaela , Gárate José-Antonio , Burnham Christian J. , Apollonio Francesca , English Niall J.
Published: January 2019

Electroporation is a matter of intensive ongoing research interest, and a much-neglected topic in trans-membrane proteins, particularly in view of such promising potential applications in medicine and biotechnology.
Enhanced microwave absorption properties of PMMA modified MnFe2O4–polyaniline nanocomposites
Authors: Lakshmi R. V. , Bera Parthasarathi , Chakradhar R. P. S. , Choudhury Balamati , Pawar Shital Patangrao , Bose Suryasarathi , Nair Raveendranath U. , Barshilia Harish C.
Published: January 2019

Nanocomposites consisting of polymethyl methacrylate modified MnFe2O4 prepared by solution combustion synthesis and polyaniline exhibit enhanced electromagnetic interference (EMI) shielding property.
A complex multiscale virtual particle model based elastic network model (CMVP-ENM) for the normal mode analysis of biomolecular complexes
Authors: Anand D. Vijay , Meng Zhenyu , Xia Kelin
Published: January 2019

The CMVP-ENM for virus normal mode analysis. With a special ratio parameter, CMVP-ENM can characterize the multi-material properties of biomolecular complexes and systematically enhance or suppress the modes for different components.
Design and characterization of novel polymorphs of single-layered tin-sulfide for direction-dependent thermoelectric applications using first-principles approaches
Authors: Ul Haq Bakhtiar , AlFaify S. , Laref A.
Published: January 2019

Advanced computational approaches have made the design and characterization of novel two-dimensional (2D) materials possible for applications in cutting-edge technologies.
Surface-mediated spin dynamics probed by optical-pump–probe scanning tunneling microscopy
Authors: Wang Zi-Han , Yoon Cheul-Hyun , Yoshida Shoji , Arashida Yusuke , Takeuchi Osamu , Ohno Yuzo , Shigekawa Hidemi
Published: January 2019

In current materials science and technologies, surface effects on carrier and spin dynamics in functional materials and devices are of great importance.
2D-MoS2 photocatalyzed cross dehydrogenative coupling reaction synchronized with hydrogen evolution reaction
Authors: Girish Yarabhally R. , Jaiswal Komal , Prakash Pranav , De Mrinmoy
Published: January 2019

The chemically exfoliated 2D-MoS2 has a mixture of 1T (metallic) and 2H (semiconducting) phases.
Anti-cancer organoruthenium(ii) complexes and their interactions with cysteine and its analogues. A mass-spectrometric study
Authors: Briš Anamarija , Jašík Juraj , Turel Iztok , Roithová Jana
Published: January 2019

ESI-MS study of ruthenium complexes shows their high selectivity toward thiol containing molecules and formation of larger thiolate-bound clusters in absence of a protecting ligand such as pta.
Naked-eye repeatable off–on–off and on–off–on switching luminescence of copper(i)-1H-imidazo[4,5-f][1,10]phenanthroline complexes with reversible acid–base responses
Authors: Shi Ying , Liu Xia , Shan Yuyu , Zhang Xia , Kong Weibo , Lu Yuenan , Tan Zhidan , Li Xiu-Ling
Published: January 2019

Repeatable off–on–off or on–off–on luminescence of a series of Cu(i) complexes is observed with reversible base–acid or acid–base responses.
Terephthalic acid from renewable sources: early-stage sustainability analysis of a bio-PET precursor
Authors: Volanti M. , Cespi D. , Passarini F. , Neri E. , Cavani F. , Mizsey P. , Fozer D.
Published: January 2019

The present work compares, from a life cycle perspective, four different ways for the production of terephthalic acid.
Internal standardization and plasma molecular species: signal correction approaches for determination of phosphorus from phospholipids in meat by MIP OES
Authors: Silva Ana Beatriz S. , Higuera Julymar M. , Nogueira Ana Rita A.
Published: January 2019

Molecular species and internal standardization for direct determination of phospholipids in meat expand the use of MIP OES.
Liquid biopsy: a perspective for probing blood for cancer
Authors: Jeffrey Stefanie S. , Toner Mehmet
Published: January 2019

Thought leaders Stefanie Jeffrey and Mehmet Toner introduce the Lab on a Chip Personalised Medicine: Liquid Biopsy thematic collection.
A cephalopod-inspired mechanoluminescence material with skin-like self-healing and sensing properties
Authors: Guo Quanquan , Huang Bingxue , Lu Canhui , Zhou Tao , Su Gehong , Jia Liyang , Zhang Xinxing
Published: January 2019

A cephalopod-inspired mechanoluminescence material with skin-like self-healing and sensing properties was developed by the construction of a unique strain-dependent microcrack-structured conductive UV-shielding layer upon a self-healable supramolecular fluorescent elastomer with synergistic dynamic crosslinking network design.
A neoteric sandwich-configurational composite film offering synchronous conductive aeolotropy, superparamagnetism and dual-color fluorescence
Authors: Yang Liu , Yu Wensheng , Tian Jiao , Xi Xue , Li Dan , Dong Xiangting , Ma Qianli , Liu Guixia , Wang Jinxian
Published: January 2019

A neoteric two-dimensional sandwich-configurational composite film offering electrically conductive aeolotropism, superparamagnetism and dual-color fluorescence was successfully fabricated via electrospinning.
A selective synthesis of glycerol carbonate from glycerol and urea over Sn(OH)2: a solid and recyclable in situ generated catalyst
Authors: Chaves Diego M. , Da Silva Márcio J.
Published: January 2019

In this work, we report a selective and straightforward process to synthesize glycerol carbonate from urea and glycerol using a simple but commercially unavailable catalyst (Sn(OH)2).
Synthesis of dipyrrolopyrazine-based sensitizers with a new π-bridge end-capped donor–acceptor framework for DSSCs: a combined experimental and theoretical investigation
Authors: Meti Puttavva , Nagaraju Goli , Yang Jung-Won , Jung Sun Hwa , Gong Young-Dae
Published: January 2019

Organic dyes with dipyrrolopyrazine as the central π-linker have been synthesized. Photovoltaic properties were investigated and supported by DFT. Thermal analysis shows good thermal stability.
A general self-template-etched solution route for the synthesis of 2D γ-manganese sulfide nanoplates and their enhanced supercapacitive performance
Authors: Li Deli , Song Shuang , Lu Jiaxue , Liang Jun , Zhang Yingying , Li Li
Published: January 2019

Electrode materials with two-dimensional (2-D) structures have attracted tremendous attention because they can exhibit many excellent electrochemical and chemical properties.
Polyelectrolyte multilayers of poly (l-lysine) and hyaluronic acid on nanostructured surfaces affect stem cell response
Authors: Niepel Marcus S. , Ekambaram Bhavya K. , Schmelzer Christian E. H. , Groth Thomas
Published: January 2019

Laser interference lithography (LIL) and layer-by-layer (LbL) technique are combined for the first time to design exceptional systems for control of stem cell fate.
Flow induced HeLa cell detachment kinetics show that oxygen-containing functional groups in graphene oxide are potent cell adhesion enhancers
Authors: Vlček Jakub , Lapčík Lubomír , Havrdová Markéta , Poláková Kateřina , Lapčíková Barbora , Opletal Tomáš , Froning Jens P. , Otyepka Michal
Published: January 2019

Oxygen-containing functional groups in graphene oxide are potent cell adhesion enhancers.
Ni nanoparticles supported on graphitic carbon nitride as visible light catalysts for hydrolytic dehydrogenation of ammonia borane
Authors: Gao Manyi , Yu Yongsheng , Yang Weiwei , Li Ji , Xu Shichong , Feng Ming , Li Haibo
Published: January 2019

The development of a robust and low-cost non-noble metal catalyst for photocatalytic H2 evolution is of great importance for practical applications.
A 2D metal–organic framework/Ni(OH)2 heterostructure for an enhanced oxygen evolution reaction
Authors: Zhu Dongdong , Liu Jinlong , Wang Liang , Du Yi , Zheng Yao , Davey Kenneth , Qiao Shi-Zhang
Published: January 2019

Ni-BDC/Ni(OH)2 hybrid nanosheets were fabricated and explored as a highly efficient electrocatalyst for the oxygen evolution reaction.
A protein corona study by scattering correlation spectroscopy: a comparative study between spherical and urchin-shaped gold nanoparticles
Authors: Moustaoui Hanane , Saber Justine , Djeddi Ines , Liu Qiqian , Movia Dania , Prina-Mello Adriele , Spadavecchia Jolanda , Lamy de la Chapelle Marc , Djaker Nadia
Published: January 2019

Gold nanoparticle interaction with proteins is characterized by using scattering correlation spectroscopy. Protein orientation and binding affinity regarding the nanoparticle surface are discussed.
A remote optically controlled hydrolase model based on supramolecular assembly and disassembly of its enzyme-like active site
Authors: Ma Ningning , Li Fei , Li Siyuan , Chu Shengnan , Han Lili , Liu Shengda , Yan Tengfei , Tian Ruizhen , Luo Quan , Liu Junqiu
Published: January 2019

A photoresponsive hydrolase model was constructed by supramolecular self-assembly to study the structure-related catalytic behaviors at different morphological transition stages.
Kinetic resolution of β-ketoesters with quaternary stereocenters via a carbene-catalyzed benzoin reaction
Authors: Zehra Syeda Tazeen , Zhang Guoxiang , Yang Shuang , Fang Xinqiang
Published: January 2019

N-Heterocyclic carbene-catalyzed kinetic resolution is used to produce enantioenriched β-ketoesters with quaternary stereocenters. Sterically bulky substituents such as benzyl, allyl, phenyl and cyclopropyl groups are all tolerated in this method.
Understanding the ring-opening polymerisation of dioxolanones
Authors: Xu Yuechao , Perry Mitchell R. , Cairns Stefan A. , Shaver Michael P.
Published: January 2019

Eliminating small molecules from dioxolane rings affords isotactic poly(mandelic acid), with competing chain transfer overcome through dynamic vacuum polymerisation.
Hierarchical CoFe-layered double hydroxide and g-C3N4 heterostructures with enhanced bifunctional photo/electrocatalytic activity towards overall water splitting
Authors: Arif Muhammad , Yasin Ghulam , Shakeel Muhammad , Mushtaq Muhammad Asim , Ye Wen , Fang Xiaoyu , Ji Shengfu , Yan Dongpeng
Published: January 2019

Hierarchical CoFe-LDH@g-C3N4 heterostructures have been synthesized via a facile and easily scalable in situ solvothermal method for efficient overall water splitting.
Metabolomics study of the therapeutic mechanism of a Chinese herbal formula on collagen-induced arthritis mice
Authors: Jin Zhen , Zhang Ji-da , Wu Xin , Cao Gang
Published: January 2019

Wenjinghuoluo (WJHL) prescription, the typical rheumatoid arthritis (RA) treatment compound in traditional Chinese medicine, shows favorable efficacy.
Fe2O3 and Gd2O3 nanoparticles loaded in mesoporous silica: insights into influence of NPs concentration and silica dimensionality
Authors: Zeleňák V. , Zeleňáková A. , Kapusta O. , Hrubovčák P. , Girman V. , Bednarčík J.
Published: January 2019

The concentration of nanoparticles inside the pores and the symmetry of the porous matrix significantly affected the magnetic properties.
Designing indacenodithiophene based non-fullerene acceptors with a donor–acceptor combined bridge for organic solar cells
Authors: Ans Muhammad , Ayub Khurshid , Bhatti Ijaz Ahmad , Iqbal Javed
Published: January 2019

Non-fullerene small acceptor molecules have gained significant attention for application in organic solar cells owing to their advantages over fullerene based acceptors.
Efficient synthesis of C15fuel precursor by heterogeneously catalyzed aldol-condensation of furfural with cyclopentanone
Authors: Ao Lei , Zhao Wei , Guan Yin-shuang , Wang Ding-kai , Liu Kai-shuai , Guo Tian-tian , Fan Xing , Wei Xian-yong
Published: January 2019

A high-quality biofuel precursor was highly yielded by heterogeneously catalyzed aldol-condensation of furfural with cyclopentanone.
Graphene oxide decorated with zinc oxide nanoflower, silver and titanium dioxide nanoparticles: fabrication, characterization, DNA interaction, and antibacterial activity
Authors: El-Shafai Nagi , El-Khouly Mohamed E. , El-Kemary Maged , Ramadan Mohamed , Eldesoukey Ibrahim , Masoud Mamdouh
Published: January 2019

The fabrication, characterization, and antibacterial activity of novel nanocomposites based on graphene oxide (GO) nanosheets decorated with silver, titanium dioxide nanoparticles, and zinc oxide nanoflowers were examined.
High dispersion and oxygen reduction reaction activity of Co3O4 nanoparticles on platelet-type carbon nanofibers
Authors: Yamada Naohito , Kowalski Damian , Koyama Akira , Zhu Chunyu , Aoki Yoshitaka , Habazaki Hiroki
Published: January 2019

In this study, platelet-type carbon nanofibers prepared by the liquid phase carbonization of polymers in the pores of a porous anodic alumina template were used to prepare the Co3O4/carbon electrocatalysts.
Water droplet on inclined dusty hydrophobic surface: influence of droplet volume on environmental dust particles removal
Authors: Abdelmagid Ghassan , Yilbas Bekir Sami , Al-Sharafi Abdullah , Al-Qahtani H. , Al-Aqeeli Nasser
Published: January 2019

A water droplet's behavior on an inclined hydrophobic surface in the presence of environmental dust particles is considered and the droplet's dynamics are analyzed pertinent to self-cleaning applications.
The vivo antioxidant activity of self-made aged garlic extract on the d-galactose-induced mice and its mechanism research via gene chip analysis
Authors: Wang Xiaomin , Yang Yukun , Zhang Min
Published: January 2019

AGE exerts its vivo antioxidant function through 41 metabolic pathways, which were related to 7 aging hallmarks.
Development of a dual-functional conjugate of antigenic peptide and Fc-III mimetics (DCAF) for targeted antibody blocking
Authors: Zhang Lin , Shen Hao , Gong Yiyi , Pang Xiaojing , Yi Meiqi , Guo Lin , Li Jin , Arroyo Sam , Lu Xin , Ovchinnikov Sergey , Cheng Gong , Liu Xudong , Jiang Xu , Feng Shan , Deng Haiteng
Published: January 2019

Long peptide DCAF enables high selectivity to target harmful antibodies, providing new thoughts for antibody-induced disease intervention.
Measuring the impact of channel length on liquid flow through an ideal Plateau border and node system
Authors: Clarke Christopher , Lazidis Aris , Spyropoulos Fotis , Norton Ian T.
Published: January 2019

The following work highlights the impact of Plateau border (PB) length, l1, on the apparent surface viscosity, μs, of a flow rate controlled PB and node system using a novel experimental setup.
Enhanced self-propulsion of a sphere-dimer in viscoelastic fluid
Authors: Sahoo Soudamini , Singh Sunil Pratap , Thakur Snigdha
Published: January 2019

Response of non-Newtonian medium results in enhancement of self-propulsion for micro-swimmers.
Enantioselective cytotoxicity of chiral polymer vesicles with linear and hyperbranched structures
Authors: Liu Funing , Zhang Hongli , Cheng Junjie , Hu Jingang , He Chenlu , Zhang Qijin , Zou Gang
Published: January 2019

Vesicles self-assembled by chiral polymers with diverse topological structures exhibit significantly different cytotoxicities on living cells.
Nanoscale hetero-interfaces between metals and metal compounds for electrocatalytic applications
Authors: Kwon Taehyun , Jun Minki , Joo Jinwhan , Lee Kwangyeol
Published: January 2019

This article reviews recent advances in the synthetic strategies for metal/metal compound hetero-interfaces within a nanostructure and their beneficial synergistic effect on the electrocatalytic performance toward energy conversion applications such as the HER, OER and ORR.
Mitigating the P2–O2 phase transition of high-voltage P2-Na2/3[Ni1/3Mn2/3]O2 cathodes by cobalt gradient substitution for high-rate sodium-ion batteries
Authors: Hou Peiyu , Li Feng , Wang Yangyang , Yin Jiangmei , Xu Xijin
Published: January 2019

A nanoscale cobalt gradient substitution is introduced to suppress the P2–O2 phase transition and improve the Na+ kinetics of high-voltage P2-Na2/3[Ni1/3Mn2/3]O2 cathodes for sodium-ion batteries.
Mechanistic understanding of electrochemical plating and stripping of metal electrodes
Authors: Tewari Deepti , Mukherjee Partha P.
Published: January 2019

Mechanisms driving the evolution of the metal electrode interface during plating, stripping and formation of dead metal.
A robust and stretchable cross-linked rubber network with recyclable and self-healable capabilities based on dynamic covalent bonds
Authors: Cao Liming , Fan Jianfeng , Huang Jiarong , Chen Yukun
Published: January 2019

Rubber composites composed of biobased epoxidized natural rubber and tunicate cellulose nanocrystals exhibited recyclable and self-healable capacities via transesterification reactions.
Accelerated electrocatalytic hydrogen evolution on non-noble metal containing trinickel nitride by introduction of vanadium nitride
Authors: Zhou Peng , Xing Danning , Liu Yuanyuan , Wang Zeyan , Wang Peng , Zheng Zhaoke , Qin Xiaoyan , Zhang Xiaoyang , Dai Ying , Huang Baibiao
Published: January 2019

We designed and synthesized a novel HER electrode Ni3N@VN–NF composite by nitriding treatment of NiV-LDH which exhibits excellent HER performances.
Ionic liquid-decorated COF and its covalent composite aerogel for selective CO2 adsorption and catalytic conversion
Authors: Ding Luo-Gang , Yao Bing-Jian , Li Fei , Shi Shao-Chuan , Huang Ning , Yin Hua-Bing , Guan Qun , Dong Yu-Bin
Published: January 2019

Herein, we report an allyl-imidazolium ionic liquid decorated COF and its covalent composite COF@chitosan aerogel, which were shown to be excellent selective CO2 adsorbents and chemical conversion catalysts.
Upgrading earth-abundant biomass into three-dimensional carbon materials for energy and environmental applications
Authors: Zhou Shaofeng , Zhou Lihua , Zhang Yaping , Sun Jian , Wen Junlin , Yuan Yong
Published: January 2019

Abundant biomass is well accepted as a carbon-rich, sustainable, and renewable precursor for three-dimensional carbon materials, offering us a plethora of possibilities for energy conversion and storage as well as environmental treatments.
Increased charge transfer state separationviareduced mixed phase interface in polymer solar cells
Authors: Ferron Thomas , Waldrip Matthew , Pope Michael , Collins Brian A.
Published: January 2019

For the first time, the mixed phase is quantified within a polymer solar cell and correlated to CT state separation and charge extraction efficiency. A causal relationship is revealed that a narrow mixed interphase between pure donor and pure acceptor domains is a key driver in device efficiency.
A muscle mimetic polyelectrolyte–nanoclay organic–inorganic hybrid hydrogel: its self-healing, shape-memory and actuation properties
Authors: Banerjee Sovan Lal , Swift Thomas , Hoskins Richard , Rimmer Stephen , Singha Nikhil K.
Published: January 2019

In this investigation, we report a non-covalent (ionic interlocking and hydrogen bonding) strategy of self-healing in a covalently crosslinked organic–inorganic hybrid nanocomposite hydrogel, with specific emphasis on tuning its properties fitting into a muscle mimetic material.
1,2-Diarylbenzene as fast T-type photochromic switch
Authors: Kitagawa Daichi , Nakahama Tatsumoto , Nakai Yoshihiro , Kobatake Seiya
Published: January 2019

A novel fast T-type photochromic molecular system, 1,2-diarylbenzene, was successfully developed.
Twisted intramolecular charge transfer and aggregation-enhanced emission characteristics based quinoxaline luminogen: photophysical properties and a turn-on fluorescent probe for glutathione
Authors: Cui Mingming , Li Wenting , Wang Lingyun , Gong Lingshan , Tang Hao , Cao Derong
Published: January 2019

A light-up fluorescent probe (QUPY-S) for glutathione detection based on a triphenylethylene-containing quinoxaline pyridinium salt has been developed.
An ultrafast responsive and sensitive ratiometric fluorescent pH nanoprobe based on label-free dual-emission carbon dots
Authors: Xia Chao , Cao Mengmeng , Xia Jinfeng , Zhou Guohong , Jiang Danyu , Zhang Dafeng , Wang Jing , Li Huili
Published: January 2019

A ratiometric and self-calibrating fluorescent pH nanoprobe based on label-free DECDs.
Extraordinary magnetic field effects mediated by spin-pair interaction and electron mobility in thermally activated delayed fluorescence-based OLEDs with quantum-well structure
Authors: Pan Ruiheng , Tang Xiantong , Hu Yeqian , Zhu Hongqiang , Deng Jinqiu , Xiong Zuhong
Published: January 2019

We fabricated quantum-well organic light-emitting diodes (QW-OLEDs) based on thermally activated delayed fluorescence (TADF) and measured their magnetic field effects curves over various magnetic field ranges.
Isomeric thermally activated delayed fluorescence emitters based on indolo[2,3-b]acridine electron-donor: a compromising optimization for efficient orange–red organic light-emitting diodes
Authors: Chen Jia-Xiong , Tao Wen-Wen , Xiao Ya-Fang , Tian Shuang , Chen Wen-Cheng , Wang Kai , Yu Jia , Geng Feng-Xia , Zhang Xiao-Hong , Lee Chun-Sing
Published: January 2019

A combination of small ΔESTand higherfin an orange–red TADF emitter results in better performances.
High-performance and moisture-resistant red-emitting Cs2SiF6:Mn4+ for high-brightness LED backlighting
Authors: Liu Yong , Zhou Zhi , Huang Lin , Brik Mikhail G. , Si Shuaichen , Lin Litian , Xuan Tongtong , Liang Hongbin , Qiu Jianbei , Wang Jing
Published: January 2019

Narrow-band Cs2SiF6:Mn4+ phosphors with high external quantum efficiency were synthesized by a low-temperature co-precipitation approach. Moreover, the water-resistance stability of the phosphors was significantly improved by a facile surface passivation strategy.
Highly efficient green and red electroluminescence with an extremely low efficiency roll-off based on iridium(iii) complexes containing a bis(diphenylphorothioyl)amide ancillary ligand
Authors: Ma Xiao-Feng , Xia Jing-Cheng , Yan Zhi-Ping , Luo Xu-Feng , Wu Zheng-Guang , Zheng You-Xuan , Zhang Wen-Wei
Published: January 2019

Two green and red Ir(iii) complexes were applied in single/double-emissive-layer OLEDs with an EQEmax of 30.8% and 18.3%, respectively, and an extremely low efficiency roll-off.
The electrochemical corrosion of an air thermally-treated carbon fiber cloth electrocatalyst with outstanding oxygen evolution activity under alkaline conditions
Authors: Wu Tianxing , Han Miaomiao , Zhu Xiaoguang , Wang Guozhong , Zhang Haimin , Zhao Huijun
Published: January 2019

An air thermally-treated carbon fiber cloth CFC-450 with a low CO content exhibits excellent OER activity. In addition, an electrochemical corrosion phenomenon was observed.
Retraction: Typical and interstratified arrangements in Zn/Al layered double hydroxides: an experimental and theoretical approach
Authors: Shore Andrew
Published: January 2019

Retraction of ‘Typical and interstratified arrangements in Zn/Al layered double hydroxides: an experimental and theoretical approach’ by Priyadarshi Roy Chowdhury and Krishna G. Bhattacharyya, CrystEngComm, 2017, DOI: 10.1039/c7ce00216e.
A near-infrared fluorescent probe for the discrimination of cysteine in pure aqueous solution and imaging of cysteine in hepatocellular carcinoma cells with facile cell-compatible ability
Authors: Yang Xin , Qian Ying
Published: January 2019

A NIR fluorescence sensor for selectively detecting cysteine in aqueous solution with fast response and long emission wavelength was synthesized.
Bifunctional acid–base mesoporous silica@aqueous miscible organic-layered double hydroxides
Authors: Suo Hongri , Duan Haohong , Chen Chunping , Buffet Jean-Charles , O'Hare Dermot
Published: January 2019

Core@shell materials which exhibit hierarchical morphology with ultra high surface area and controllable pore size and structure have been synthesised.
Studying the phosphoryl transfer mechanism of theE. coliphosphofructokinase-2: from X-ray structure to quantum mechanics/molecular mechanics simulations
Authors: Murillo-López Juliana , Zinovjev Kirill , Pereira Humberto , Caniuguir Andres , Garratt Richard , Babul Jorge , Recabarren Rodrigo , Alzate-Morales Jans , Caballero Julio , Tuñón Iñaki , Cabrera Ricardo
Published: January 2019

Phosphofructokinases catalyze the ATP-dependent phosphorylation of fructose-6-phosphate and they are highly regulated.
The metabolite repair enzyme Nit1 is a dual-targeted amidase that disposes of damaged glutathione in Arabidopsis
Authors: Niehaus Thomas D. , Patterson Jenelle A. , Alexander Danny C. , Folz Jakob S. , Pyc Michal , MacTavish Brian S. , Bruner Steven D. , Mullen Robert T. , Fiehn Oliver , Hanson Andrew D.
Published: January 2019

The tripeptide glutathione (GSH) is implicated in various crucial physiological processes including redox buffering and protection against heavy metal toxicity. GSH is abundant in plants, with reported intracellular concentrations typically in the 1–10 mM range. Various aminotransferases can inadvertently transaminate the amino group of the γ-glutamyl moiety of GSH to produce deaminated glutathione (dGSH), a metabolite damage product. It was recently reported that an amidase known as Nit1 participates in dGSH breakdown in mammals and yeast. Plants have a hitherto uncharacterized homolog of the Nit1 amidase. We show that recombinant Arabidopsis Nit1 (At4g08790) has high and specific amidase activity towards dGSH. Ablating the Arabidopsis Nit1 gene causes a massive accumulation of dGSH and other marked changes to the metabolome. All plant Nit1 sequences examined had predicted plastidial targeting peptides with a potential second start codon whose use would eliminate the targeting peptide. In vitro transcription/translation assays show that both potential translation start codons in Arabidopsis Nit1 were used and confocal microscopy of Nit1–GFP fusions in plant cells confirmed both cytoplasmic and plastidial localization. Furthermore, we show that Arabidopsis enzymes present in leaf extracts convert GSH to dGSH at a rate of 2.8 pmol min−1 mg−1 in the presence of glyoxalate as an amino acceptor. Our data demonstrate that plants have a dGSH repair system that is directed to at least two cellular compartments via the use of alternative translation start sites.
Discovery of a sub-Keplerian disk with jet around a 20 M⊙ young star
Authors: Sanna A. , Kölligan A. , Moscadelli L. , Kuiper R. , Cesaroni R. , Pillai T. , Menten K. M. , Zhang Q. , Caratti o Garatti A. , Goddi C. , Leurini S. , Carrasco-González C.
Published: January 2019

It is well established that solar-mass stars gain mass via disk accretion, until the mass reservoir of the disk is exhausted and dispersed, or condenses into planetesimals. Accretion disks are intimately coupled with mass ejection via polar cavities in the form of jets and less collimated winds, which allow mass accretion through the disk by removing a substantial fraction of its angular momentum. Whether disk accretion is the mechanism leading to the formation of stars with much higher masses is still unclear. Here, we are able to build a comprehensive picture of the formation of an O-type star by directly imaging a molecular disk, which rotates and undergoes infall around the central star, and drives a molecular jet that arises from the inner disk regions. The accretion disk is truncated between 2000 and 3000 au, it has a mass of about a tenth of the central star mass, and is infalling towards the central star at a high rate (6 × 10−4 M⊙ yr−1), so as to build up a very massive object. These findings, obtained with the Atacama Large Millimeter/submillimeter Array at 700 au resolution, provide observational proof that young massive stars can form via disk accretion much like solar-mass stars.
Spectral and morphological study of the gamma radiation of the middle-aged supernova remnant HB 21
Authors: Ambrogi L. , Zanin R. , Casanova S. , De Oña Wilhelmi E. , Peron G. , Aharonian F.
Published: January 2019

Aims. We investigate the nature of the accelerated particles responsible for the production of the gamma-ray emission observed from the middle-aged supernova remnant (SNR) HB 21.

Methods. We present the analysis of more than nine years of Fermi LAT data from the SNR HB 21. We performed morphological and spectral analysis of the SNR by means of a three-dimensional binned likelihood analysis. To assess the intrinsic properties of the parent particle models, we fit the obtained gamma-ray spectral energy distribution of the SNR by both hadronic- and leptonic-induced gamma-ray spectrum.

Results. We observe an extended emission positionally in agreement with the SNR HB 21. The bulk of this gamma-ray emission is detected from the remnant; photons up to ~10 GeV show clear evidence of curvature at the lower energies. The remnant is characterized by an extension of 0°.83, that is, 30% smaller than claimed in previous studies. The increased statistics allowed us also to resolve a point-like source at the edge of the remnant, in proximity to a molecular cloud of the Cyg OB7 complex. In the southern part of the remnant, a hint of an additional gamma-ray excess in correspondence to shocked molecular clouds is observed.

Conclusions. The spectral energy distribution of the SNR shows evidence of a break around 400 MeV, which can be properly fitted within both the hadronic and leptonic scenario. The pion-decay mechanism reproduces well the gamma rays, postulating a proton spectrum with a slope ~2.5 and with a steepening around tens of GeV, which could be explained by the energy-dependent escape of particles from the remnant. In the leptonic scenario the electron spectrum within the SNR matches closely the locally measured spectrum. This remarkable and novel result shows that SNR HB 21 could be a direct contributor to the population of Galactic electrons. In the leptonic scenario, we find that the local electron spectrum with a break around 2 GeV, closely evokes the best-fitting parental spectrum within this SNR. If such a scenario is confirmed, this would indicate that the SNR might be a source of Galactic background electrons.
A 3D view of the Hyades stellar and sub-stellar population
Authors: Lodieu N. , Smart R. L. , Pérez-Garrido A. , Silvotti R.
Published: January 2019

Aims. Our scientific goal is to provide a 3D map of the nearest open cluster to the Sun, the Hyades, combining the recent release ofGaiaastrometric data, ground-based parallaxes of sub-stellar member candidates and photometric data from surveys which cover large areas of the cluster.

Methods. We combined the secondGaiarelease with ground-basedH-band parallaxes obtained with the infrared camera on the 2 m robotic Liverpool telescope to astrometrically identify stellar and sub-stellar members of the Hyades, the nearest open cluster to the Sun.

Results. We find 1764 objects within 70° radius from the cluster centre from theGaiasecond data release, whose kinematic properties are consistent with the Hyades. We limit our study to 30 pc from the cluster centre (47.03 ± 0.20 pc) where we identify 710 candidate members, including 85 and 385 in the core and tidal radius, respectively. We determine proper motions and parallaxes of eight candidate brown dwarf members and confirm their membership. Using the 3D positions and a model-based mass-luminosity relation we derive a luminosity and mass function in the 0.04–2.5M⊙range. We confirm evidence for mass segregation in the Hyades and find a dearth of brown dwarfs in the core of the cluster. From the white dwarf members we estimate an age of 640−49+67Myr.

Conclusions. We identify a list of members in the Hyades cluster from the most massive stars down to the brown dwarfs. We produce for the first time a 3D map of the Hyades cluster in the stellar and sub-stellar regimes and make available the list of candidate members.
Predicting the broad-lines polarization emitted by supermassive binary black holes
Authors: Savić D. , Marin F. , Popović L. Č.
Published: January 2019

Context. Some Type-1 active galactic nuclei (AGN) show extremely asymmetric Balmer lines with the broad peak redshifted or blueshifted by thousands of km s−1. These AGN may be good candidates for supermassive binary black holes (SMBBHs). The complex line shapes can be due to the complex kinematics of the two broad line regions (BLRs). Therefore other methods should be applied to confirm the SMBBHs. One of them is spectropolarimetry.

Aims. We rely on numerical modeling of the polarimetry of binary black holes systems, since polarimetry is highly sensitive to geometry, in order to find the specific influence of supermassive binary black hole (SMBBH) geometry and dynamics on polarized parameters across the broad line profiles. We apply our method to SMBBHs in which both components are assumed to be AGN with distances at the subparsec scale.

Methods. We used a Monte Carlo radiative transfer code that simulates the geometry, dynamics, and emission pattern of a binary system where two black holes are getting increasingly close. Each gravitational well is accompanied by its own BLR and the whole system is surrounded by an accretion flow from the distant torus. We examined the emission line deformation and predicted the associated polarization that could be observed.

Results. We modeled scattering-induced broad line polarization for various BLR geometries with complex kinematics. We find that the presence of SMBBHs can produce complex polarization angle profilesφand strongly affect the polarized and unpolarized line profiles. Depending on the phase of the SMBBH, the resulting double-peaked emission lines either show red or blue peak dominance, or both the peaks can have the same intensity. In some cases, the whole line profile appears as a single Gaussian line, hiding the true nature of the source.

Conclusions. Our results suggest that future observation with the high resolution spectropolarimetry of optical broad emission lines could play an important role in detecting subparsec SMBBHs.
The CARMENES search for exoplanets around M dwarfs
Authors: Fuhrmeister B. , Czesla S. , Schmitt J. H. M. M. , Johnson E. N. , Schöfer P. , Jeffers S. V. , Caballero J. A. , Zechmeister M. , Reiners A. , Ribas I. , Amado P. J. , Quirrenbach A. , Bauer F. , Béjar V. J. S. , Cortés-Contreras M. , Díez Alonso E. , Dreizler S. , Galadí-Enríquez D. , Guenther E. W. , Kaminski A. , Kürster M. , Lafarga M. , Montes D.
Published: January 2019

We use spectra from CARMENES, the Calar Alto high-Resolution search for M dwarfs with Exo-earths with Near-infrared and optical Echelle Spectrographs, to search for periods in chromospheric indices in 16 M0–M2 dwarfs. We measure spectral indices in the Hα, the Ca II infrared triplet (IRT), and the Na I D lines to study which of these indices are best-suited to finding rotation periods in these stars. Moreover, we test a number of different period-search algorithms, namely the string length method, the phase dispersion minimisation, the generalized Lomb–Scargle periodogram, and the Gaussian process regression with quasi-periodic kernel. We find periods in four stars using Hα and in five stars using the Ca II IRT, two of which have not been found before. Our results show that both Hα and the Ca II IRT lines are well suited for period searches, with the Ca II IRT index performing slightly better than Hα. Unfortunately, the Na I D lines are strongly affected by telluric airglow, and we could not find any rotation period using this index. Further, different definitions of the line indices have no major impact on the results. Comparing the different search methods, the string length method and the phase dispersion minimisation perform worst, while Gaussian process models produce the smallest numbers of false positives and non-detections.