bluuebunny/crossref_metadata_2025 huggingface dataset:
Modification of N-terminal α-amine of proteins via biomimetic ortho-quinone-mediated oxidation
Authors: Wang Siyao , Zhou Qingqing , Chen Xiaoping , Luo Rong-Hua , Li Yunxue , Liu Xinliang , Yang Liu-Meng , Zheng Yong-Tang , Wang Ping
Published: April 2021

Naturally abundant quinones are important molecules, which play essential roles in various biological processes due to their reduction potential. In contrast to their universality, the investigation of reactions between quinones and proteins remains sparse. Herein, we report the development of a convenient strategy to protein modification via a biomimetic quinone-mediated oxidation at the N-terminus. By exploiting unique reactivity of an ortho-quinone reagent, the α-amine of protein N-terminus is oxidized to generate aldo or keto handle for orthogonal conjugation. The applications have been demonstrated using a range of proteins, including myoglobin, ubiquitin and small ubiquitin-related modifier 2 (SUMO2). The effect of this method is further highlighted via the preparation of a series of 17 macrophage inflammatory protein 1β (MIP-1β) analogs, followed by preliminary anti-HIV activity and cell viability assays, respectively. This method offers an efficient and complementary approach to existing strategies for N-terminal modification of proteins.
Development and validation of a new instrument to measure social pain
Authors: Stangier Ulrich , Schüller Johanna , Brähler Elmar
Published: April 2021

Social pain is an emotional reaction to social exclusion which has been widely investigated in experimental settings. We developed the Social Pain Questionnaire (SPQ) and examined its factor structure, reliability, and construct validity. We constructed a 46-item pool that covered a broad range of situations related to social pain. Using three different subsamples (Online convenience sample: n = 623, Representative sample: n = 2531, Clinical sample of outpatients seeking psychotherapy: n = 270) we reduced the item pool to 10 items for the final SPQ scale, paying particular attention to content validity and factorial structure. Convergent, divergent and discriminant validity were assessed using standardized measures of related constructs and group differences. For the final 10-item version, a good factorial structure and reliability were found. Convergent validity was supported by correlations with related instruments of interpersonal sensitivity, attachment styles, depression and social anxiety. The representative and clinical sample differed significantly in social pain. The SPQ is an economic self-report measure with solid psychometric properties. Our data support the factorial, construct and convergent validity. The SPQ can be used to clarify the role of social pain in mental disorders and to incorporate interventions targeted towards social pain in psychotherapeutic settings.
Initial defensive secretory compounds emitted from the live millipede and the induction of apoptotic cell death
Authors: Taira Junsei , Tamashiro Miki , Naka Kaori , Gakiya Sahori , Taira Kazuyo
Published: April 2021

The initial defensive secretory compounds emitted from a live millipede have not yet been clarified. This study focused on elucidating the initial secretory compounds emitted from a live millipede. Pre-concentration of the defensive secretory volatile organic compounds (VOC) from the live Polidesmida millipedes, Chamberlinius hualienensis and Oxidus gracilis, was performed using a three-stage VOC concentration technique by an on-line GC/MS system. As a result, the monoterpenes derived from the plant metabolite; i.e., α-pinene, α-thujene, β-pinene, 3-carene, β-myrcene, β-phellandrene, γ-terpinene, o,m,p-cymenes, limonene and camphene were first detected as the initial secretory substances. It was elucidated that some plant monoterpenes have a repellent effect and antifungal and antibacterial actions which are used as defensive substances. In addition, this study also confirmed that these monoterpenes induced apoptotic cell death involved in the induction of the caspase 3/7 activity. The millipede feeds on fallen or withered leaves containing the monoterpenes. Thus, the millipede accumulates the plant defensive secretions in the exocrine defense glands of the body somites, which would be used as against predators.
Cannabis sativa terpenes are cannabimimetic and selectively enhance cannabinoid activity
Authors: LaVigne Justin E. , Hecksel Ryan , Keresztes Attila , Streicher John M.
Published: April 2021

Limited evidence has suggested that terpenes found in Cannabis sativa are analgesic, and could produce an “entourage effect” whereby they modulate cannabinoids to result in improved outcomes. However this hypothesis is controversial, with limited evidence. We thus investigated Cannabis sativa terpenes alone and with the cannabinoid agonist WIN55,212 using in vitro and in vivo approaches. We found that the terpenes α-humulene, geraniol, linalool, and β-pinene produced cannabinoid tetrad behaviors in mice, suggesting cannabimimetic activity. Some behaviors could be blocked by cannabinoid or adenosine receptor antagonists, suggesting a mixed mechanism of action. These behavioral effects were selectively additive with WIN55,212, suggesting terpenes can boost cannabinoid activity. In vitro experiments showed that all terpenes activated the CB1R, while some activated other targets. Our findings suggest that these Cannabis terpenes are multifunctional cannabimimetic ligands that provide conceptual support for the entourage effect hypothesis and could be used to enhance the therapeutic properties of cannabinoids.
Cardiac MRI structural and functional predictors of left ventricular ejection fraction recovery following PVC catheter ablation
Authors: Mao Jessica , Xie Eric , Chamera Ela , Lima Joao A. C. , Chrispin Jonathan
Published: April 2021

Frequent premature ventricular contractions (PVCs) can induce cardiomyopathy (PVC CM). We sought to use cardiac magnetic resonance imaging (CMR) to quantify changes in cardiac structure and function of cardiomyopathy patients following catheter ablation for PVCs. Patients undergoing PVC ablation at the Johns Hopkins Hospital with pre-procedural CMR from 2010 to 2018 were included in this study. CMR Images were analyzed to collect information on cardiac structure and function as well as to quantify scar. Of the total 51 included patients, PVC CM (LVEF < 45%) was observed in 51% (n = 29). Of these, 19 had post-ablation ejection fractions quantified, with 78.9% (n = 15) recovering function. Global longitudinal strain was significantly correlated with LVEF (OR 1.831, p < 0.01) but did not predict recovery of function. RV origin of PVCs was more common in the preserved LVEF group but was also significantly correlated with persistently reduced EF post-ablation in the PVC CM group. Scar burden was not correlated with either cardiac function or post-ablation recovery of function. In this cohort, there were no significant CMR findings to predict subsequent recovery of EF after ablation among those with PVC CM. PVC origin in the RV was associated with persistently reduced LVEF after ablation.
Repository scale classification and decomposition of tandem mass spectral data
Authors: Mongia Mihir , Mohimani Hosein
Published: April 2021

Various studies have shown associations between molecular features and phenotypes of biological samples. These studies, however, focus on a single phenotype per study and are not applicable to repository scale metabolomics data. Here we report MetSummarizer, a method for predicting (i) the biological phenotypes of environmental and host-oriented samples, and (ii) the raw ingredient composition of complex mixtures. We show that the aggregation of various metabolomic datasets can improve the accuracy of predictions. Since these datasets have been collected using different standards at various laboratories, in order to get unbiased results it is crucial to detect and discard standard-specific features during the classification step. We further report high accuracy in prediction of the raw ingredient composition of complex foods from the Global Foodomics Project.
Transitional changes in gastrointestinal transit and rectal sensitivity from active to recovery of inflammation in a rodent model of colitis
Authors: Chen Yan , Guo Yu , Gharibani Payam , Chen Jie , Selaru Florin M. , Chen Jiande D. Z.
Published: April 2021

Patients with ulcerative colitis are typically suspected of an inflammatory flare based on suggestive symptoms of inflammation. The aim of this study was to evaluate the impact of inflammation on colonic motility and rectal sensitivity from active to recovery of inflammation. Male rats were given drinking water with 5% dextran sulfate sodium for 7 days. Inflammation, intestinal motor and sensory functions were investigated weekly for 6 weeks. (1) The disease activity index score, fecal calprotectin and tumor necrosis factor alpha were increased from Day 0 to Day 7 (active inflammation) and then decreased gradually until recovery. (2) Distal colon transit was accelerated on Day 7, and then remained unchanged. Whole gut transit was delayed on Day 7 but accelerated from Day 14 to Day 42. (3) Rectal compliance was unaffected from Day 0 to Day 7, but decreased afterwards. (4) Rectal hypersensitivity was noted on Day 7 and persistent. (5) Plasma acetylcholine was decreased on Day 7 but increased from Day 14 to Day 42. Nerve growth factor was increased from Day 7 to Day 42. DSS-induced inflammation leads to visceral hypersensitivity that is sustained until the resolution of inflammation, probably mediated by NGF. Rectal compliance is reduced one week after the DSS-induced inflammation and the reduction is sustained until the resolution of inflammation. Gastrointestinal transit is also altered during and after active colonic inflammation.
Estradiol analogs attenuate autophagy, cell migration and invasion by direct and selective inhibition of TRPML1, independent of estrogen receptors
Authors: Rühl Philipp , Rosato Anna Scotto , Urban Nicole , Gerndt Susanne , Tang Rachel , Abrahamian Carla , Leser Charlotte , Sheng Jiansong , Jha Archana , Vollmer Günter , Schaefer Michael , Bracher Franz , Grimm Christian
Published: April 2021

The cation channel TRPML1 is an important regulator of lysosomal function and autophagy. Loss of TRPML1 is associated with neurodegeneration and lysosomal storage disease, while temporary inhibition of this ion channel has been proposed to be beneficial in cancer therapy. Currently available TRPML1 channel inhibitors are not TRPML isoform selective and block at least two of the three human isoforms. We have now identified the first highly potent and isoform-selective TRPML1 antagonist, the steroid 17β-estradiol methyl ether (EDME). Two analogs of EDME, PRU-10 and PRU-12, characterized by their reduced activity at the estrogen receptor, have been identified through systematic chemical modification of the lead structure. EDME and its analogs, besides being promising new small molecule tool compounds for the investigation of TRPML1, selectively affect key features of TRPML1 function: autophagy induction and transcription factor EB (TFEB) translocation. In addition, they act as inhibitors of triple-negative breast cancer cell migration and invasion.
A study of dopant incorporation in Te-doped GaAsSb nanowires using a combination of XPS/UPS, and C-AFM/SKPM
Authors: Ramaswamy Priyanka , Devkota Shisir , Pokharel Rabin , Nalamati Surya , Stevie Fred , Jones Keith , Reynolds Lew , Iyer Shanthi
Published: April 2021

We report the first study on doping assessment in Te-doped GaAsSb nanowires (NWs) with variation in Gallium Telluride (GaTe) cell temperature, using X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), conductive-atomic force microscopy (C-AFM), and scanning Kelvin probe microscopy (SKPM). The NWs were grown using Ga-assisted molecular beam epitaxy with a GaTe captive source as the dopant cell. Te-incorporation in the NWs was associated with a positive shift in the binding energy of the 3d shells of the core constituent elements in doped NWs in the XPS spectra, a lowering of the work function in doped NWs relative to undoped ones from UPS spectra, a significantly higher photoresponse in C-AFM and an increase in surface potential of doped NWs observed in SKPM relative to undoped ones. The carrier concentration of Te-doped GaAsSb NWs determined from UPS spectra are found to be consistent with the values obtained from simulated I–V characteristics. Thus, these surface analytical tools, XPS/UPS and C-AFM/SKPM, that do not require any sample preparation are found to be powerful characterization techniques to analyze the dopant incorporation and carrier density in homogeneously doped NWs.
A rebinding-assay for measuring extreme kinetics using label-free biosensors
Authors: Quinn John G.
Published: April 2021

In vitro kinetic measurements allow mechanistic characterization of binding interactions and are particularly valuable throughout drug discovery, from confirmation of on-target binding in early discovery to fine-tuning of drug-binding properties in pre-clinical development. Early chemical matter often exhibits transient kinetics, which remain challenging to measure in a routine drug discovery setting. For example, characterization of irreversible inhibitors has classically relied on the alkylation rate constant, yet this metric fails to resolve its fundamental constituent rate constants, which drive reversible binding kinetics and affinity complex inactivation. In other cases, extremely rapid association processes, which can approach the diffusion limit, also remain challenging to measure. To address these limitations, a practical kinetic rebinding assay is introduced that may be applied for kinetic screening and characterization of compounds. The new capabilities afforded by this probe-based assay emerge from mixed-phase partitioning in a flow-injection configuration and have been implemented using label-free biosensing. A finite element analysis-based biosensor model, simulating inhibition of rebinding within a crowded hydrogel milieu, provided surrogate test data that enabled development and validation of an algebraic model for estimation of kinetic interaction constants. An experimental proof-of-principle demonstrating estimation of the association rate constant, decoupled from the dissociation process, provided further validation.
The image features of emotional faces that predict the initial eye movement to a face
Authors: Stuit S. M. , Kootstra T. M. , Terburg D. , van den Boomen C. , van der Smagt M. J. , Kenemans J. L. , Van der Stigchel S.
Published: April 2021

Emotional facial expressions are important visual communication signals that indicate a sender’s intent and emotional state to an observer. As such, it is not surprising that reactions to different expressions are thought to be automatic and independent of awareness. What is surprising, is that studies show inconsistent results concerning such automatic reactions, particularly when using different face stimuli. We argue that automatic reactions to facial expressions can be better explained, and better understood, in terms of quantitative descriptions of their low-level image features rather than in terms of the emotional content (e.g. angry) of the expressions. Here, we focused on overall spatial frequency (SF) and localized Histograms of Oriented Gradients (HOG) features. We used machine learning classification to reveal the SF and HOG features that are sufficient for classification of the initial eye movement towards one out of two simultaneously presented faces. Interestingly, the identified features serve as better predictors than the emotional content of the expressions. We therefore propose that our modelling approach can further specify which visual features drive these and other behavioural effects related to emotional expressions, which can help solve the inconsistencies found in this line of research.
Author Correction: Interplay between success and patterns of human collaboration: case study of a Thai Research Institute
Authors: Fiscarelli Antonio Maria , Brust Matthias R. , Bouffanais Roland , Piyatumrong Apivadee , Danoy Grégoire , Bouvry Pascal
Published: April 2021

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Author Correction: Senescence of song revealed by a long-term study of the Seychelles warbler (Acrocephalus sechellensis)
Authors: Berg Mathew L. , Beebe Sarah C. , Komdeur Jan , Cardilini Adam P. A. , Ribot Raoul F. H. , Bennett Andrew T. D. , Buchanan Katherine L.
Published: April 2021

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Anomalous patterns of Saffman–Taylor fingering instability during a metastable phase separation
Authors: Suzuki Ryuta X. , Tada Hikari , Hirano Sae , Ban Takahiko , Mishra Manoranjan , Takeda Risa , Nagatsu Yuichiro
Published: April 2021

The displacement of one viscous fluid by another less viscous one during phase separation under the thermodynamically metastable conditions in porous media makes anomalous interfacial patterns.
Dielectric polymers for high-temperature capacitive energy storage
Authors: Li He , Zhou Yao , Liu Yang , Li Li , Liu Yi , Wang Qing
Published: April 2021

The growing demand for advanced electronics requires dielectrics operating at high temperatures. The development of high-temperature dielectric polymers is reviewed from the perspective of structure design, dielectric and capacitive performance.
Multi-modal image sharpening in fourier transform infrared (FTIR) microscopy
Authors: Mankar Rupali , Gajjela Chalapathi Charan , Shahraki Farideh Foroozandeh , Prasad Saurabh , Mayerich David , Reddy Rohith
Published: April 2021

Multi-modal fusion improves spatial resolution of FTIR images beyond diffraction-limit that improves classification of histology classes. Enhanced spatial details are comparable to O-PTIR which is a super-resolution spectroscopic imaging technology.
Nucleic acid analysis on paper substrates (NAAPs): an innovative tool for Point of Care (POC) infectious disease diagnosis
Authors: Yadav Supriya , Sharma Niti Nipun , Akhtar Jamil
Published: April 2021

The cost-effective rapid diagnosis of infectious diseases is an essential and important factor for curing such diseases in the global public health care picture.
Correction: Micro/nano-net guides M2-pattern macrophage cytoskeleton distribution via Src–ROCK signalling for enhanced angiogenesis
Authors: Yang Yang , Lin Yujing , Zhang Zhengchuan , Xu Ruogu , Yu Xiaoran , Deng Feilong
Published: April 2021

Correction for ‘Micro/nano-net guides M2-pattern macrophage cytoskeleton distribution via Src–ROCK signalling for enhanced angiogenesis’ by Yang Yang et al., Biomater. Sci., 2021, DOI: 10.1039/d1bm00116g.
Synthesis of hydrogen-substituted graphdiynes via dehalogenative homocoupling reactions
Authors: Wu Jiasheng , Liang Jizhe , Zhang Yijie , Zhao Xiaoli , Yuan Chunxue
Published: April 2021

A porous hydrogen-substituted graphdiyne is synthesized via the dehalogenative homocoupling reaction of terminal alkynyl bromides under mild conditions.
Antifouling fluoropolymer-coated nanomaterials for 19F MRI
Authors: Jirak Daniel , Svoboda Jan , Filipová Marcela , Pop-Georgievski Ognen , Sedlacek Ondrej
Published: April 2021

Multifunctional polymer coating for gold nanoparticles enables simultaneous 19F MRI tracing and shielding from blood plasma fouling.
Asymmetrically strained hcp rhodium sublattice stabilized by 1D covalent boron chains as an efficient electrocatalyst
Authors: Li Zhenyu , Ai Xuan , Chen Hui , Liang Xiao , Li Xiaotian , Wang Dong , Zou Xiaoxin
Published: April 2021

RhB comprising an asymmetrically strained hcp Rh sublattice is identified as a hydrogen-evolving electrocatalyst with Pt-like activity, due to its optimized electronic structure primarily controlled by Rh(d)–B(s,p) orbital hybridization.
The single-tube quantitative rapid detection of coliform bacteria based on enzyme-specific technology
Authors: Cai Jinzhong , Yishun Huang , Zhang Weiyun
Published: April 2021

The described method can be used to detect coliform bacteria (CB) specifically and portably, and it could have wide applications for CB detection in various food and water samples.
Transition metal chemistry in synthetically viable alkaline earth complexes M(Cp)3− (M = Ca, Sr, Ba)
Authors: Huo Bin , Sun Rui , Jin Bo , Hu Lingfei , Bian Jian-Hong , Guan Xiao-Ling , Yuan Caixia , Lu Gang , Wu Yan-Bo
Published: April 2021

We propose the new evidence for the heavy alkaline earth metals to be considered as the “honorary transition metals” by verifying the interesting π–d bonding in stable M(Cp)3− complexes composing of cationic M2+ centre and anionic Cp− ligands.
Engineering structure and functionalities of chemical vapor deposited photocatalytic titanium dioxide films through different types of precursors
Authors: Samélor Diane , Turgambaeva Asiya , Krisyuk Vladislav , Miquelot Adeline , Cure Jeremy , Sysoev Sergey , Trubin Sergey , Stabnikov Pavel , Esvan Jérôme , Constandoudis Vassilios , Vahlas Constantin
Published: April 2021

The functional properties of photocatalytic CVD processed TiO2 films can be monitored by appropriately selecting the precursors chemistry.
Boosting OER performance of IrO2 in acid via urchin-like hierarchical-structure design
Authors: Deng Qian , Sun You , Wang Jin , Chang Shengding , Ji Muwei , Qu Yunteng , Zhang Kai , Li Bo
Published: April 2021

Urchin-like hierarchical IrO2 nanostructures are obtained by a surfactant-free, wet-chemical approach. The urchin-like IrO2 sample with relatively short needles and small cores obtained at 180 °C shows optimal OER activity and good stability in acid.
p-Toluenesulfonic acid functionalized imidazole ionic liquids encapsulated into bismuth SBA-16 as high-efficiency catalysts for Friedel–Crafts acylation reaction
Authors: Gao Guofang , Zhao Qian , Yang Cheng , Jiang Tingshun
Published: April 2021

Four imidazole ionic liquids acidified withp-toluenesulfonic acid were loaded on Bi-SBA-16 mesoporous materials to obtain four composite catalysts with strong acid properties. They were applied to acylation reaction of anisole and acetic anhydride.
A novel series of giant cobalt-calixarene macrocycles: ring-expansion and modulation of pore apertures through recrystallization
Authors: Zhang Kai , Du Shao-Wu
Published: April 2021

A novel series of giant cobalt-calixarene wheels was synthesized. Ring-expansion and modulation of pore aperture were achieved through recrystallization.
Coupling Co2P/CoSe2 heterostructure nanoarrays for boosting overall water splitting
Authors: Du Xiaoqiang , Li Jiaxin , Tong Kaicheng , Zhang Xiaoshuang
Published: April 2021

Results demonstrate that Co2P/CoSe2-300//Co2P/CoSe2-300 pairs display superior water splitting performance while requiring a cell voltage of 1.52 V only to drive a current density of 20 mA cm−2.
A dithiacyclam-coordinated silver(i) polymer with anti-cancer stem cell activity
Authors: Johnson Alice , Iffland Linda , Singh Kuldip , Apfel Ulf-Peter , Suntharalingam Kogularamanan
Published: April 2021

A cancer stem cell (CSC) active, solution stable, silver(i) polymeric complex bearing a dithiacyclam ligand is reported.
Assessment of carbon dioxide removal potentialviaBECCS in a carbon-neutral Europe
Authors: Rosa Lorenzo , Sanchez Daniel L. , Mazzotti Marco
Published: April 2021

The European technical potential for biogenic carbon dioxide removal is assessed considering seven different BECCS configurations that do not require purpose-grown bio-energy plantations.
Photoresponsive frameworks: energy transfer in the spotlight
Authors: Martin Corey R. , Park Kyoung Chul , Corkill Ryan E. , Kittikhunnatham Preecha , Leith Gabrielle A. , Mathur Abhijai , Abiodun Sakiru L. , Greytak Andrew B. , Shustova Natalia B.
Published: April 2021

Photochromic units integrated within metal- and covalent-organic framework matrices act as a switch to control resonance energy transfer processes.
Producing glyceric acid from glycerol via integrating vacuum dividing wall columns: conceptual process design and techno-economic-environmental analysis
Authors: Zhou Xin , Yan Hao , Feng Xiang , Zhao Hui , Liu Yibin , Chen Xiaobo , Chen De , Yang Chaohe
Published: April 2021

Based on the PtRu/MCM-41 nanocatalysts, an efficient glycerol-to-glyceric acid process that integrates the vacuum dividing wall columns (namely, VDG process) is proposed by bringing insight into the essence of thermal-sensitivity.
Photoantioxidant and antibiofilm studies of green synthesized Sn-doped CeO2 nanoparticles using aqueous leaf extracts of Pometia pinnata
Authors: Naidi Siti Najihah , Khan Fazlurrahman , Tan Ai Ling , Harunsani Mohammad Hilni , Kim Young-Mog , Khan Mohammad Mansoob
Published: April 2021

CeO2 and Sn-doped CeO2 NPs synthesized using aqueous leaf extracts of Pometia pinnata and their photoantioxidant and antibiofilm applications.
Efficiently luminescent mononuclear copper iodide complexes with sterically hindered iminephosphine chelating ligands
Authors: Zhang Bin , Zhang Jie , Sun Ahui , Liu Chunmei , Gu Mengsi , Chen Yahui , Wei Bin , Du Chenxia
Published: April 2021

Cu(i) complexes realize high luminescence properties due to steric hindrances of the ligands and synergistic heavy atom (Cu and I) effects.
Topologically diverse polycyclic aromatic hydrocarbons from pericyclic reactions with polyaromatic phospholes
Authors: Mokrai Réka , Szűcs Rózsa , Duffy Matthew P. , Dorcet Vincent , Roisnel Thierry , Benkő Zoltán , Nyulászi László , Bouit Pierre-Antoine , Hissler Muriel
Published: April 2021

Topologically divers PAHs with planar, twisted and negatively curved topologies were obtained from polycyclic phospholes using pericyclic reactions.
Design of a ZnMoO4 porous nanosheet with oxygen vacancies as a better performance electrode material for supercapacitors
Authors: Li Pengxi , Wang Jiepeng , Li Liming , Song Shili , Yuan Xianming , Jiao Wenqiang , Hao Zhen , Li Xiaoli
Published: April 2021

A ZnMoO4 porous nanosheet with oxygen vacancies (ZnMoO4-OV) was synthesized which delivers a preferable energy storage performance.
Ligand-dependent nano-mechanical properties of CdSe nanoplatelets: calibrating nanobalances for ligand affinity monitoring
Authors: Martinet Quentin , Baronnier Justine , Girard Adrien , Albaret Tristan , Saviot Lucien , Mermet Alain , Abecassis Benjamin , Margueritat Jérémie , Mahler Benoît
Published: April 2021

The influence of ligands mass on the low frequency vibration of cadmium selenide colloidal nanoplatelets of different thicknesses is investigated using resonant low frequency Raman scattering.
Interplay between microstructure, defect states, and mobile charge generation in transition metal dichalcogenide heterojunctions
Authors: Sulas-Kern Dana B. , Zhang Hanyu , Li Zhaodong , Blackburn Jeffrey L.
Published: April 2021

We use microwave photoconductivity and transient absorption spectroscopy to show higher yields of mobile carriers and longer lifetimes in nanotube/MoS2 heterojunctions when monolayer MoS2 contains a small fraction of defect-rich multilayer islands.
Switching on near-infrared light in lanthanide-doped CsPbCl3 perovskite nanocrystals
Authors: Zeng Min , Locardi Federico , Mara Dimitrije , Hens Zeger , Van Deun Rik , Artizzu Flavia
Published: April 2021

A facile and general strategy to switch on the NIR emission output of Ln3+-doped CsPbCl3 perovskites through Mn2+ codoping is demonstrated.
Rational design of N-doped CNTs@C3N4 network for dual-capture of biocatalysts in enzymatic glucose/O2 biofuel cells
Authors: Li Gangyong , Ren Guangming , Wang Wei (Alex) , Hu Zongqian
Published: April 2021

N-doped CNTs/C3N4 nanocomposite is rationally designed as an electrode material for dual-capture of biocatalysts in glucose/O2 biofuel cells and is capable of harvesting electrical power from soft drinks.
Multi-stimuli-responsive aggregation of nanoparticles driven by the manipulation of colloidal stability
Authors: Johnson Luke , Gray Dominic M. , Niezabitowska Edyta , McDonald Tom O.
Published: April 2021

This review focussed on the design of multi-stimuli-responsive nanoparticles that offer spatial and temporal control of their aggregation behaviour. The review covers the fundamental concepts, the recent developments, and the applications of these materials.
Engineering of pH-triggered nanoplatforms based on novel poly(2-methyl-2-oxazoline)-b-poly[2-(diisopropylamino)ethyl methacrylate] diblock copolymers with tunable morphologies for biomedical applications
Authors: Černoch Peter , Jager Alessandro , Černochová Zulfiya , Sincari Vladimir , Albuquerque Lindomar J. C. , Konefal Rafal , Pavlova Ewa , Giacomelli Fernando C. , Jager Eliezer
Published: April 2021

CROP and RAFT polymerization was used to produce PMeOxm-b-PDPAn block copolymers. The microfluid technique enabled the manufacturing of pH-triggered nanoplatforms with different morphologies as driven by the overall molecular weight of the chains.
Design of pure heterodinuclear lanthanoid cryptate complexes
Authors: Buch Christian D. , Hansen Steen H. , Mitcov Dmitri , Tram Camilla M. , Nichol Gary S. , Brechin Euan K. , Piligkos Stergios
Published: April 2021

We present a synthetic strategy to prepare the first heterodinuclear lanthanide(iii) cryptate complexes. The cryptate design ensures that the complexes are stable in solution for days. The exchange coupling in YbYb, GdGd and YbGd is investigated.
An experimentally determined field winding model with frequency‐dependent parameters
Authors: Felicetti Roberto , Abrahamsson Curt Johan David , Lundin Urban
Published: April 2021

Herein, a set of experimental procedures is presented for determining the main electrical distributed parameters of the field winding in salient pole synchronous machines. It applies to the electrical characterisation of iron‐core power inductors and transformer windings as well, in a range of frequency useful for power electronics applications. A first estimation of the parameters is obtained by forcing the winding into resonance with capacitors of known capacitance. The obtained estimates are then refined through an iterative process, which makes use of the winding natural frequencies. The presented procedures are applied step‐by‐step to the field winding of a 60‐kVA salient pole synchronous generator with solid poles. The distributed parameters model, featured using the outlined procedures, accurately reproduces the winding voltage distribution in a large range of frequency. Finally, it is explored how the interaction between armature and rotor influences the field winding parameters, pointing to the differences of measuring them with the rotor inside or outside the machine bore.
Energy storage capacity configuration of building integrated photovoltaic‐phase change material system considering demand response
Authors: Sun Liang , Li Jiawen , Chen Lidong , Xi Jiaming , Li Benxin
Published: April 2021

With the increasing building energy consumption, building integrated photovoltaic has emerged. However, this method has problems such as low photovoltaic absorption rate and large load peak–valley difference. For this reason, the authors have constructed a building integrated photovoltaic‐phase change material system considering the demand response. Under the demand response at the time of use, the system was powered by building photovoltaic power generation. The thermostatically controlled load demand inside buildings was satisfied jointly by the phase change energy storage and the air conditioning. The system can run offline or connected to the grid through surplus electricity. When electricity is insufficient, the system can purchase it from the grid. The system dispatching strategy is also given. Based on the principles of minimising the daily cost of system operation, maximising the photovoltaic absorption rate, and minimising the peak–valley difference, a multi‐objective optimisation model is established, and the particle swarm algorithm is used to perform the capacity configuration on the energy storage system. Finally, case analysis was conducted to verify that the scheme is able to reduce the system operating cost by over 50%. In addition, it can greatly increase the photovoltaic absorption rate and reduce the peak–valley difference to achieve peak load shifting. The scheme has significant economic and technical benefits.
The newborn black hole in GRB 191014C proves that it is alive
Authors: Moradi R. , Rueda J. A. , Ruffini R. , Wang Y.
Published: April 2021

A multi-decade theoretical effort has been devoted to finding an efficient mechanism to use the rotational and electrodynamical extractable energy of a Kerr-Newman black hole (BH), to power the most energetic astrophysical sources such as gamma-ray bursts (GRBs) and active galactic nuclei. We show an efficient general relativistic electrodynamical process which occurs in the “inner engine” of a binary driven hypernova. The inner engine is composed of a rotating Kerr BH of mass M and dimensionless spin parameter α, a magnetic field of strength B0 aligned and parallel to the rotation axis, and a very low-density ionized plasma. Here, we show that the gravitomagnetic interaction between the BH and the magnetic field induces an electric field that accelerates electrons and protons from the environment to ultrarelativistic energies emitting synchrotron radiation. We show that in GRB 190114C the BH of mass M = 4.4 M⊙, α = 0.4, and B0 ≈ 4 × 1010 G can lead to a high-energy (≳GeV) luminosity of 1051 erg s−1. The inner engine parameters are determined by requiring (1) that the BH extractable energy explains the GeV and ultrahigh-energy emission energetics, (2) that the emitted photons are not subjected to magnetic-pair production, and (3) that the synchrotron radiation timescale agrees with the observed high-energy timescale. We find for GRB 190114C a clear jetted emission of GeV energies with a semi-aperture angle of approximately 60° with respect to the BH rotation axis.
The host galaxy of the short GRB 050709
Authors: Nicuesa Guelbenzu A. M. , Klose S. , Schady P. , Greiner J. , Hartmann D. H. , Hunt L. K. , Magnelli B. , Masetti N. , Michałowski M. J. , Palazzi E. , Rossi A. , Wieringa M. , Stecklum B.
Published: April 2021

The host of the short gamma-ray burst (GRB) 050709 is a morphologically disturbed low-luminous galaxy. At a redshift of z = 0.16, it belongs to one of the cosmologically nearest short-GRB hosts identified to date. Consequently, it represents a promising target for sensitive, spatially resolved observational studies. We have used the Multi Unit Spectroscopic Explorer (MUSE) mounted at the Very Large Telescope to characterize the GRB host galaxy. In addition, we performed deep radio-continuum observations of the host with the Australia Telescope Compact Array (ATCA) and with ALMA at 1.3 mm. Moreover, we made use of archival Spitzer Space Telescope 24 μm and Hubble Space Telescope/F814W imaging data of this galaxy. The spatially resolved MUSE data reveal that the entire host is a source of strong line emission, in particular from Hα and [O III] λ 5007, superimposed on a rather weak stellar continuum. Using the Balmer decrement, we map the internal host-galaxy reddening and derive an extinction-corrected star formation rate based on the flux in the Hα line of 0.15 ± 0.02 M⊙ yr−1. The galaxy is detected neither by ALMA nor by Spitzer, excluding a substantial amount of optically obscured star formation activity. Using the O3N2 metallicity indicator, we measure an average 12 + log (O/H) = 8.40 ± 0.05 (corresponding to ∼0.5 solar). Diagnostic emission line diagrams show that a substantial fraction of all MUSE spaxels that cover the GRB 050709 host galaxy lie close to the star-formation demarcation line. Some spaxels even suggest line emission by shocked gas. The ATCA observations reveal faint diffuse radio emission at the eastern part of the host in excess to that expected from pure star formation, possibly further evidence for nonthermal processes. The kinematics of the Hα-emitting gas suggests a rotationally supported host-galaxy system, apparently in contrast to its irregular photometric morphology. A comparison with the field-galaxy population reveals, however, that the kinematics of the gas in the 050709 host fits into the ensemble of merging galaxies well. Finally, we use the ATCA radio data to set deep constraints on any late-time flux from the GRB afterglow or a potentially associated kilonova radio flare ∼10 years after the burst.
Development zone spillover effect: the externality of the gathering of manufacturing enterprises
Authors: Wang Yilin
Published: April 2021

Using the data of manufacturing enterprises from 2003 to 2013 and the data of the state-level economic and technological development zone and high-tech development zone from 2010 to 2012, this paper uses BD-DD dual robust identification strategy to analyse the impact mechanism of the overflow effect of the establishment of state-level development zones by accurately judging the geographical relationship between enterprises and development zones. The results show that the development zone has a significant spillover effect on the surrounding manufacturing enterprises, and the total factor productivity of enterprises within 1000m is about 9% higher than that of enterprises within 1000m from the boundary of the development zone and the existence of Marshall’s adjust theory is tested. Spillover effects have a range of 1000m on innovation, while human capital is only 500m, indicating that knowledge spillover effects established in development zones are the main source of gathering externality. From the different characteristics of manufacturing, high-tech or mature manufacturing enterprises are more affected by spillover effects, possibly because high-tech or mature enterprises and regional enterprises overlap more in factors of production or technology, it is more likely to form Marshall cluster externality.
Analysis on the Ski Industry in China
Authors: Wang Yuyan
Published: April 2021

As the living standard increased, more and more people join this sport. The rapid development of skiing equipment and ski resorts stimulates multiple people to experience skiing. This paper analyzes the current situation and development of the ski industry in China. Based on the case study, the author analyzes the prospect and provides suggestions in the end for ski companies.
Based on the influence of financial innovation development on the financing of science and innovation enterprises
Authors: Bai Bingqian
Published: April 2021

In recent years, the banking industry has constantly innovated the current financing methods and changed the service mode, namely, “investment linkage”, “equity pledge”, “intellectual property pledge” and other innovative financial service modes, which provide financial support for some scientific and innovative enterprises to carry out financing and so on. Therefore, it can be seen that the development of financial innovation has a positive impact on promoting the financing of science and technology innovation-oriented enterprises. On the basis of achieving a win-win situation, it injects new opportunities into the country’s economic development. This paper makes an in-depth analysis and exploration on this issue.
Airbnb Short-term Housing Rental Status Prediction Model Under the Impact of the COVID-19 Pandemic
Authors: Lu Zhixiang
Published: April 2021

With the vigorous development of the sharing economy, the short-term rental industry has also spawned many emerging industries that belong to the sharing economy. However, due to the impact of the COVID-19 pandemic in 2020, many sharing economy industries, including the short-term housing leasing industry, have been affected. This study takes the rental information of 1,004 short-term rental houses in New York in April 2020 as an example, through machine learning and quantitative analysis, we conducted statistical and visual analysis on the impact of different factors on the housing rental status. This project is based on the machine learning model to predict the changes in the rental status of the house on the time series. The results show that the prediction accuracy of the random forest model has reached more than 94%, and the prediction accuracy of the logistic model has reached more than 74%. At the same time, we have further explored the impact of time span differences and regional differences on the housing rental status.
Based on the MADM model wine sales manager competency research
Authors: Lv Lingxiao , Zeng Jing
Published: April 2021

In order to solve the problem of the lack of professional wine marketing team, this paper identified the key influencing factors of wine sales managers from the competency point of view, constructed the competency model and evaluation index system of wine sales managers, and introduced the improved multiattribute decision making method (MADM) to evaluate the competency. The results show that there is an interactive relationship between the competency dimensions and indicators of wine sales managers, and the professional knowledge dimension has the greatest influence on the other four dimensions. Based on these findings, suggestions are made for future research.
Attitudes of online users towards personal information leakage: based on Sina Weibo database
Authors: Min Wang , You Zhilong
Published: April 2021

With the rapid development of internet, people pay more attention to personal information security. Drawing upon three components of attitude, this study was designed to realize online users’ attitudes toward personal information leakage. Web crawl program was used to get the blog data from Sina Weibo. Results show that the main media for personal information leak include mobile phones, telephone, media and networks. People who have verification published blog more than no verification people. People pay more attention to account number. Pioneer and No verification people have more negative affection. Personal account, VIP and Organization people have more positive affection. If the blog has higher interaction, positive affect will also rise. Media’s blogs exert an imperceptible influence on people’s behavior.
Research on the Changing Trend of Employment-Relevant Terms Based on Internet Big Data Analysis
Authors: Wei Yang
Published: April 2021

With publicly-available data collected from mainstream information platforms, this study used the term frequency inverse document frequency (TF-IDF) algorithm to detect 74 popular terms and phrases about employment, analyzed the changes in the ranking of these terms and phrases, and visualized the changing trend in the attention to employment skills from 2017 to 2019. The research result will facilitate application of big data technology to teaching administration in colleges, and provide a guide for college students to plan their study of vocational skills.
Research on Accounting Treatment and Information Presentation of Enterprise Data Assets
Authors: Wang An
Published: April 2021

In the process of rapid development of big data technology, the digital technology revolution is developing faster and faster. In the context of big data, the data resources of enterprises have been equipped to become data assets. The corporate financial accounting system requires effective accounting treatment and information presentation of data assets. This is a problem that must be addressed in the current corporate development process. This article researches and analyzes the accounting treatment of enterprise data assets and the related content of information presentation. The author also discussed the specific characteristics of data assets in the course of enterprise operation, and how to strengthen the classification research work of data assets. This can improve the effectiveness of the data asset information presentation model, and provide a reference for similar enterprise data asset business and related information disclosure. This is also conducive to give full play to the value discovery function of accounting information in the development process of the enterprise, and reduce the problem of asymmetry of internal and external information.
An Analysis of the Intelligent Interactive Mode of College English Based on Superstar Learning
Authors: Liu Aihua , Kong Dehua , Wang Zhuo Wei
Published: April 2021

As a product of the in-depth integration of information technology and classroom teaching, smart classroom is the carrier of intelligent interactive mode, which can realize classroom structure reform and precise teaching. Intelligent interactive mode is a new way and choice of college teaching at present. The exploration of intelligent interactive mode and the application of intelligent interaction in the three aspects of college English courses show that the intelligent interactive mode has a promoting effect on the intelligence of college English classroom teaching and the development of personality.
The Influence of the Configuration Effect of Social Capital and Knowledge Absorptive Capacity on the Cooperation Intensity of Cooperatives Participating in Agricultural Industrialization Consortia
Authors: Zhang Wenziyi , Wang Xueshun , Yang Hong , Hu Xiao
Published: April 2021

Agricultural industrialization consortia fully realize the organizational advantages of division of labor, risk sharing, and benefit sharing, which mainly rely on close cooperation of members under integrated governance, but the current influence mechanism on the intensity of cooperation is yet to be explored in depth. Using 40 member cooperatives of agricultural industrialization consortia in Sichuan Province as research samples, this paper explores the mechanism by which the configuration effects of five conditional factors at the levels of social capital and knowledge absorptive capacity can generate different cooperative intensity of cooperative participation in consortia using fuzzy set qualitative comparative analysis. It was found that (1) the driving mechanism of high cooperative intensity of cooperatives was divided into three paths; (2) the driving mechanism of non-high cooperative intensity of cooperatives was divided into two paths and had an asymmetric relationship with the driving mechanism of high cooperative intensity of cooperatives. The findings of this paper help to expand the research perspective on cooperative intensity at the level of social capital and knowledge absorptive capacity configuration, and provide useful insights for improving the cooperative intensity of cooperative participation in consortia and the cooperative tightness among consortium members.
Using AI to Create O2O Labor Law Consultation and Training Integration Scheme
Authors: Liu Jia , Xiao Bao-Yao , Yang Ying , Huang Zhi-Tao , Liu Wen-Jie , Nie Xiao-Hui , Chang Shih-Feng
Published: April 2021

In recent years, with the rapid development of economy, China’s labor relations are constantly changing, and the demands of workers for interests are increasing. In addition, with the outbreak of COVID-19, enterprises are facing severe challenges under both external and internal pressure. In view of this, relying on AI technology and professional personnel, Wish Magic provides consultation and service of labor laws and regulations for people or enterprises in need of relevant help, mediates labor disputes and strives for legitimate interests through online AI keyword search and offline VIP face-to-face expert consultation.