bluuebunny/crossref_metadata_2025 huggingface dataset:
Recent progress in silk fibroin-based flexible electronics
Authors: Wen Dan-Liang , Sun De-Heng , Huang Peng , Huang Wen , Su Meng , Wang Ya , Han Meng-Di , Kim Beomjoon , Brugger Juergen , Zhang Hai-Xia , Zhang Xiao-Sheng
Published: May 2021

With the rapid development of the Internet of Things (IoT) and the emergence of 5G, traditional silicon-based electronics no longer fully meet market demands such as nonplanar application scenarios due to mechanical mismatch. This provides unprecedented opportunities for flexible electronics that bypass the physical rigidity through the introduction of flexible materials. In recent decades, biological materials with outstanding biocompatibility and biodegradability, which are considered some of the most promising candidates for next-generation flexible electronics, have received increasing attention, e.g., silk fibroin, cellulose, pectin, chitosan, and melanin. Among them, silk fibroin presents greater superiorities in biocompatibility and biodegradability, and moreover, it also possesses a variety of attractive properties, such as adjustable water solubility, remarkable optical transmittance, high mechanical robustness, light weight, and ease of processing, which are partially or even completely lacking in other biological materials. Therefore, silk fibroin has been widely used as fundamental components for the construction of biocompatible flexible electronics, particularly for wearable and implantable devices. Furthermore, in recent years, more attention has been paid to the investigation of the functional characteristics of silk fibroin, such as the dielectric properties, piezoelectric properties, strong ability to lose electrons, and sensitivity to environmental variables. Here, this paper not only reviews the preparation technologies for various forms of silk fibroin and the recent progress in the use of silk fibroin as a fundamental material but also focuses on the recent advanced works in which silk fibroin serves as functional components. Additionally, the challenges and future development of silk fibroin-based flexible electronics are summarized.
B7-H3 suppresses doxorubicin-induced senescence-like growth arrest in colorectal cancer through the AKT/TM4SF1/SIRT1 pathway
Authors: Wang Ruoqin , Sun Linqing , Xia Suhua , Wu Hongya , Ma Yanchao , Zhan Shenghua , Zhang Guangbo , Zhang Xueguang , Shi Tongguo , Chen Weichang
Published: May 2021

Emerging evidence suggests that cellular senescence induced by chemotherapy has been recognized as a new weapon for cancer therapy. This study aimed to research novel functions of B7-H3 in cellular senescence induced by a low dose of doxorubicin (DOX) in colorectal cancer (CRC). Here, our results demonstrated that B7-H3 knockdown promoted, while B7-H3 overexpression inhibited, DOX-induced cellular senescence. B7-H3 knockdown dramatically enhanced the growth arrest of CRC cells after low-dose DOX treatment, but B7-H3 overexpression had the opposite effect. By RNA-seq analysis and western blot, we showed that B7-H3 prevented cellular senescence and growth arrest through the AKT/TM4SF1/SIRT1 pathway. Blocking the AKT/TM4SF1/SIRT1 pathway dramatically reversed B7-H3-induced resistance to cellular senescence. More importantly, B7-H3 inhibited DOX-induced cellular senescence of CRC cells in vivo. Therefore, targeting B7-H3 or the B7-H3/AKT/TM4SF1/SIRT1 pathway might be a new strategy for promoting cellular senescence-like growth arrest during drug treatment in CRC.
Robust microbe immune recognition in the intestinal mucosa
Authors: Schären Olivier P. , Hapfelmeier Siegfried
Published: May 2021

The mammalian mucosal immune system acts as a multitasking mediator between bodily function and a vast diversity of microbial colonists. Depending on host–microbial interaction type, mucosal immune responses have distinct functions. Immunity to pathogen infection functions to limit tissue damage, clear or contain primary infection, and prevent or lower the severity of a secondary infection by conferring specific long-term adaptive immunity. Responses to nonpathogenic commensal or mutualistic microbes instead function to tolerate continuous colonization. Mucosal innate immune and epithelial cells employ a limited repertoire of innate receptors to program the adaptive immune response accordingly. Pathogen versus nonpathogen immune discrimination appears to be very robust, as most individuals successfully maintain life-long mutualism with their nonpathogenic microbiota, while mounting immune defense to pathogenic microbe infection specifically. However, the process is imperfect, which can have immunopathological consequences, but may also be exploited medically. Normally innocuous intestinal commensals in some individuals may drive serious inflammatory autoimmunity, whereas harmless vaccines can be used to fool the immune system into mounting a protective anti-pathogen immune response. In this article, we review the current knowledge on mucosal intestinal bacterial immune recognition focusing on TH17 responses and identify commonalities between intestinal pathobiont and vaccine-induced TH17 responses.
On the optimality of 2°C targets and a decomposition of uncertainty
Authors: van der Wijst Kaj-Ivar , Hof Andries F. , van Vuuren Detlef P.
Published: May 2021

Determining international climate mitigation response strategies is a complex task. Integrated Assessment Models support this process by analysing the interplay of the most relevant factors, including socio-economic developments, climate system uncertainty, damage estimates, mitigation costs and discount rates. Here, we develop a meta-model that disentangles the uncertainties of these factors using full literature ranges. This model allows comparing insights of the cost-minimising and cost-benefit modelling communities. Typically, mitigation scenarios focus on minimum-cost pathways achieving the Paris Agreement without accounting for damages; our analysis shows doing so could double the initial carbon price. In a full cost-benefit setting, we show that the optimal temperature target does not exceed 2.5 °C when considering medium damages and low discount rates, even with high mitigation costs. With low mitigation costs, optimal temperature change drops to 1.5 °C or less. The most important factor determining the optimal temperature is the damage function, accounting for 50% of the uncertainty.
Daily full spectrum light exposure prevents food allergy-like allergic diarrhea by modulating vitamin D3 and microbiota composition
Authors: Chen Po-Jung , Nakano Toshiaki , Lai Chia-Yun , Chang Kuei-Chen , Chen Chao-Long , Goto Shigeru
Published: May 2021

The importance of sun exposure on human health is well recognized, and a recent trend in the avoidance of sun exposure has led to the risk of missing the beneficial effects such as vitamin D3 biogenesis. Vitamin D3 insufficiency is one of the risk factors for the development of food allergies (FAs), and vitamin D3 status controls gut homeostasis by modulating the microbiota. This study aimed to explore the impact of daily full spectrum light exposure (phototherapy) on the pathogenesis of FAs. Phototherapy ameliorated allergic diarrhea and improved FA-associated vitamin D3 insufficiency and dysbiosis. Fecal microbiota transplantation (FMT) of FA donor feces induced allergic diarrhea with OVA-specific IgE elevation in naïve mice. In contrast, FMT of naïve donor feces ameliorated allergic diarrhea in established FA mice, suggesting the involvement of the microbiota composition in FA. Phototherapy is an alternative approach for the prevention of FA-like allergic diarrhea through the modulation of vitamin D3 status and microbiota composition.
Equation of motion for grain boundaries in polycrystals
Authors: Zhang Luchan , Han Jian , Srolovitz David J. , Xiang Yang
Published: May 2021

Grain boundary (GB) dynamics are largely controlled by the formation and motion of disconnections (with step and dislocation characters) along with the GB. The dislocation character gives rise to shear coupling; i.e. the relative tangential motion of two grains meeting at the GB during GB migration. In a polycrystal, the shear coupling is constrained by the presence of other grains and GB junctions, which prevents large-scale sliding of one grain relative to the other. We present continuum equations of motion for GBs that is based upon the underlying disconnection dynamics and accounts for this mechanical constraint in polycrystals. This leads to a reduced-order (zero-shear constrained) model for GB motion that is easily implemented in a computationally efficient framework, appropriate for the large-scale simulation of the evolution of polycrystalline microstructures. We validated the proposed reduced-order model with direct comparisons to full multi-disconnection mode simulations.
Exposure of subtle multipartite quantum nonlocality
Authors: Taddei M. M. , Silva T. L. , Nery R. V. , Aguilar G. H. , Walborn S. P. , Aolita L.
Published: May 2021

The celebrated Einstein–Podolsky–Rosen quantum steering has a complex structure in the multipartite scenario. We show that a naively defined criterion for multipartite steering allows, like in Bell nonlocality, for a contradictory effect whereby local operations could create steering seemingly from scratch. Nevertheless, neither in steering nor in Bell nonlocality has this effect been experimentally confirmed. Operational consistency is reestablished by presenting a suitable redefinition: there is a subtle form of steering already present at the start, and it is only exposed—as opposed to created—by the local operations. We devise protocols that, remarkably, are able to reveal, in seemingly unsteerable systems, not only steering, but also Bell nonlocality. Moreover, we find concrete cases where entanglement certification does not coincide with steering. A causal analysis reveals the crux of the issue to lie in hidden signaling. Finally, we implement one of the protocols with three photonic qubits deterministically, providing the experimental demonstration of both exposure and super-exposure of quantum nonlocality.
Probabilistic teleportation of a quantum dot spin qubit
Authors: Kojima Y. , Nakajima T. , Noiri A. , Yoneda J. , Otsuka T. , Takeda K. , Li S. , Bartlett S. D. , Ludwig A. , Wieck A. D. , Tarucha S.
Published: May 2021

Electron spins in semiconductor quantum dots have been intensively studied for implementing quantum computation and high-fidelity single- and two-qubit operations have recently been achieved. Quantum teleportation is a three-qubit protocol exploiting quantum entanglement and it serves as an essential primitive for more sophisticated quantum algorithms. Here we demonstrate a scheme for quantum teleportation based on direct Bell measurement for a single-electron spin qubit in a triple quantum dot utilizing the Pauli exclusion principle to create and detect maximally entangled states. The single spin polarization is teleported from the input qubit to the output qubit. We find this fidelity is primarily limited by singlet–triplet mixing, which can be improved by optimizing the device parameters. Our results may be extended to quantum algorithms with a larger number of semiconductor spin qubits.
Publisher Correction: Investigating the network consequences of focal brain lesions through comparisons of real and simulated lesions
Authors: Tao Yuan , Rapp Brenda
Published: May 2021

An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Outstanding spin-transport properties of a flexible phosphorene photodetector driven by the photogalvanic effect under mechanical strains
Authors: Xie Yufeng , Zhao Juan , Hu Yibin , Ye Xiang , Xie Yiqun , Cao Ronggen
Published: May 2021

Pure spin current for a photon energy of 3.1 eV with a polarization angle of 53 degree under linearly polarized light.
Emerging trends in anion storage materials for the capacitive and hybrid energy storage and beyond
Authors: Dou Qingyun , Wu Nanzhong , Yuan Haocheng , Shin Kang Ho , Tang Yongbing , Mitlin David , Park Ho Seok
Published: May 2021

Emerging trends in anion storage materials are reviewed, focusing on the classification, storage mechanisms, and electrochemical features of anion storage materials in various electrolytes for electrochemical capacitors in a symmetric or hybrid manner.
The potential contribution of urine source separation to the SDG agenda – a review of the progress so far and future development options
Authors: Larsen Tove A. , Gruendl Harald , Binz Christian
Published: May 2021

Closing the human nutrient cycle with decentralized urine separation would help to achieve progress in food security and water protection – especially in poor countries. For this, radical innovation is needed along the whole sanitation value chain.
High-sensitivity detection of two H7 subtypes of avian influenza viruses (AIVs) by immunochromatographic assay with highly chromatic red silica nanoparticles
Authors: Su Zixian , Zhao Guangying , Dou Wenchao
Published: May 2021

In this work, high chromaticity red SiNPs were for the first time used as novel visual markers in ICA for the detection of H7 subtype influenza viruses, and the quantitative detection of the avian influenza H7 HA virus (H7N2 and H7N9) was realized by sandwich immunoassay.
A validated liquid chromatography-tandem mass spectrometric method for the determination of co-administered ranitidine and metronidazole in plasma of human volunteers
Authors: El-Naem Omnia A. , El-Maraghy Christine M.
Published: May 2021

This work describes the development, optimization and validation of a liquid chromatography-tandem mass spectrometric method (LC-MS/MS) for the simultaneous analysis of co-administered ranitidine (RAN) and metronidazole (MET) in plasma of healthy human volunteers.
Dual-state emission difluoroboron derivatives for selective detection of picric acid and reversible acid/base fluorescence switching
Authors: Ni Yingyong , Zhang Shuaishuai , He Xuan , Huang Jianyan , Kong Lin , Yang Jianjun , Yang Jiaxiang
Published: May 2021

A difluoroboron derivative (TPEBF) was designed and synthesized by combining tetraphenylethylene with α-cyanostilbene units. TPEBF emits high dual-state fluorescence both in solution and the solid state, and was applied in the sensing of picric acid.
Cu2−xSe/Bi2Se3@PEG Z-scheme heterostructure: a multimode bioimaging guided theranostic agent with enhanced photo/chemodynamic and photothermal therapy
Authors: Wang Ying , Wang Wenjia , Sang Dongmiao , Yu Kai , Lin Huiming , Qu Fengyu
Published: May 2021

Cu2−xSe/Bi2Se3@PEG Z-scheme heterostructures were prepared by the cation-exchange method to integrate the enhanced PDT and PTT (60.4%) with CT/MR/IR imaging for anticancer therapy.
Near infrared light activation of an injectable whole-cell cancer vaccine for cancer immunoprophylaxis and immunotherapy
Authors: Wang Fei , Gao Junbin , Wang Shuanghu , Jiang Jiamiao , Ye Yicheng , Ou Juanfeng , Liu Shuwen , Peng Fei , Tu Yingfeng
Published: May 2021

An injectable live-cell cancer vaccine (InLCCV) has been successfully constructed. Upon near-infrared (NIR) laser irradiation, InLCCV can activate the body's immune response and can be used for cancer immunoprophylaxis and immunotherapy.
Discovery of SARS-CoV-2 main protease inhibitors using a synthesis-directed de novo design model
Authors: Morris Aaron , McCorkindale William , Consortium The COVID Moonshot , Drayman Nir , Chodera John D. , Tay Savaş , London Nir , Lee Alpha A.
Published: May 2021

We discovered potent SARS-CoV-2 main protease inhibitors using synthesis-directed molecular design.
Palladium(0)-catalysed regioselective cyclisations of 2-amino(tosyl) benzamides/sulphonamides: the stereoselective synthesis of 3-ylidene-[1,4]benzodiazepin-5-ones/benzo[f][1,2,5]thiadiazepine-1,1-dioxides
Authors: Mondal Debasmita , Pal Gargi , Chowdhury Chinmay
Published: May 2021

The described Pd(0) catalysed cyclisation reactions using tert-butyl propargyl carbonates and 2-amino(tosyl)benzamides or sulphonamides proceed readily to afford 1,4-benzodiazepine-5-ones or their sultam analogs.
Chemoproteomics-based target profiling of sinomenine reveals multiple protein regulators of inflammation
Authors: Chen Lianguo , Wang Hong-jian , Ji Teng-fei , Zhang Chong-Jing
Published: May 2021

Activity-based protein profiling (ABPP) of a natural inhibitor of inflammation revealed multiple protein regulators of inflammation.
Copper-catalyzed monochloromethylazidation to access transformable terminal alkyl chlorides using stoichiometric BrCH2Cl
Authors: Zhang Ya-Xuan , Bian Kang-Jie , Jin Ruo-Xing , Yang Chi , Wang Xi-Sheng
Published: May 2021

Efficient copper-catalyzed monochloromethylazidation of alkenes with BrCH2Cl as a stoichiometric chloromethylating source has been developed.
Direct screening of a target-specific covalent binder: stringent regulation of warhead reactivity in a matchmaking environment
Authors: Tabuchi Yudai , Watanabe Takahito , Katsuki Riku , Ito Yuji , Taki Masumi
Published: May 2021

To find targeted covalent biologics, we demonstrated a direct screening method of a peptidic covalent binder via reactivity/affinity-based co-selection using T7 phage display.
Rh-Catalyzed cascade C–H activation/C–C cleavage/cyclization of carboxylic acids with cyclopropanols
Authors: Wang Siqi , Miao Erfei , Wang Hao , Song Bichao , Huang Wei , Yang Weibo
Published: May 2021

Merging both C–H and C–C activation in a tandem process is a highly appealing but a marked challenge.
The antibacterial activity of peptide dendrimers and polymyxin B increases sharply above pH 7.4
Authors: Cai Xingguang , Javor Sacha , Gan Bee Ha , Köhler Thilo , Reymond Jean-Louis
Published: May 2021

A previously unknown pH-effect on the antimicrobial activity of peptide dendrimers and polymyxin B against Klebsiella pneumoniae and MRSA is reported.
Structural revision of a Wnt/β-catenin modulator and confirmation of cannabielsoin constitution and configuration
Authors: Monroe Angelina Z. , Gordon William H. , Wood Jared S. , Martin Gary E. , Morgan Jeremy B. , Williamson R. Thomas
Published: May 2021

In this report, we revise the structure for a previously reported synthetic product proposed to be the 1R,2S-cannabidiol epoxide and reassign it as cannabielsoin using anisotropic NMR and synthetic chemistry methods.
Photophysical studies of a room temperature phosphorescent Cd(ii) based MOF and its application towards ratiometric detection of Hg2+ ions in water
Authors: Majee Prakash , Singha Debal Kanti , Daga Pooja , Hui Sayani , Mahata Partha , Mondal Sudip Kumar
Published: May 2021

A cadmium based MOF showed room temperature phosphorescence and interacted very selectively with Hg2+ ions. The phosphorescence emission at 520 nm gradually disappeared while low intensity fluorescence at 383 nm gradually increased.
From absolute potentials to a generalized computational standard hydrogen electrode for aqueous and non-aqueous solvents
Authors: Busch Michael , Ahlberg Elisabet , Laasonen Kari
Published: May 2021

A protocol to compute proton stabilities in non-aqueous solvents is presented and the absolute potentials in 36 solvents are predicted.
Comparative study of polymer looping kinetics in passive and active environments
Authors: Zhang Bingjie , Lei Ting , Zhao Nanrong
Published: May 2021

We investigate the intriguing active crowder size and activity-crowding coupling effects on the polymer looping kinetics. A perplexing facilitation-inhibition transition is clarified and the underlying mechanism is unraveled.
Nb2N monolayer as a promising anode material for Li/Na/K/Ca-ion batteries: a DFT calculation
Authors: Wang Yanwei , Tian Wu , Zhang Huijuan , Wang Yu
Published: May 2021

This work not only demonstrates that a Nb2N monolayer can be used as a promising anode material but also inspires the future rational design of other nitride MXenes in energy conversion and storage devices.
Theoretical investigation of defective MXenes as potential electrocatalysts for CO reduction toward C2 products
Authors: Qian Xu , Li Lei , Li Yanle , Liu Zeyu , Tian Ziqi , Zhan Cheng , Chen Liang
Published: May 2021

Dual-oxygen vacancy in defective Mo2TiC2O2 can confine and enrich active *COH species, significantly promoting C–C bond coupling.
Theoretically modelling graphene-like carbon matryoshka with strong stability and particular three-center two-electron π bonds
Authors: Li Mengyang , Zhao Yaoxiao , Gao Zhibin , Yuan Kun , Zhao Xiang
Published: May 2021

A novel 2D-carbon allotrope L-2Gy with excellent catalytic activity for the HER has been constructed showing strong stability which is ascribed to the particular electronic structure of L-2Gy, delocalized π electrons based on 27 × 3c-2e π bonds.
An anionic potassium-organic framework for selective removal of uranyl ions
Authors: Yang Qianqian , Wang Yijie , Yang Jianjian , Yin Jianbo , Liu Di , Liu Ning , Wang Rongming , Sun Daofeng , Li Xiyou , Jiang Jianzhuang
Published: May 2021

An anionic potassium organic framework was constructed, and it shows high selective adsorption towards UO22+ at 298 K, with effective removal over a wide pH range, a high adsorption capacity, and efficient adsorption at low concentration.
Strategic design and synthesis of star-shaped organic linkers for mesoporous MOFs
Authors: Fucci Rosa , Vande Velde Christophe M. L.
Published: May 2021

Two libraries of novel star-shaped linkers were synthesized using an optimized direct arylation reaction for cheap, fast and easy synthesis.
Protic ionic liquids from di- or triamines: even cheaper Brønsted acidic catalysts
Authors: Brzęczek-Szafran Alina , Więcławik Justyna , Barteczko Natalia , Szelwicka Anna , Byrne Emily , Kolanowska Anna , Swadźba Kwaśny Małgorzata , Chrobok Anna
Published: May 2021

Dicationic and tricationic ionic liquids, synthesised by proton transfer from sulfuric acid and corresponding di- and triamines, were characterised and used as Brønsted acidic catalysts in biodiesel production.
Sustainable chemo-enzymatic synthesis of glycerol carbonate (meth)acrylate from glycidol and carbon dioxide enabled by ionic liquid technologies
Authors: Villa Rocio , Porcar Raul , Nieto Susana , Donaire Antonio , Garcia-Verdugo Eduardo , Luis Santiago V. , Lozano Pedro
Published: May 2021

A sustainable chemo-enzymatic process for producing both glycerol carbonate acrylate and glycerol carbonate methacrylate, as monomers for the preparation of biodegradable plastic materials, has been developed by using ionic liquid technologies.
High pressure switchable water: an alternative method for separating organic products from water
Authors: Cunha Igor T. , Yang Huilin , Jessop Philip G.
Published: May 2021

New methods for the separation of organics products from water are needed if biomass conversion is to become environmentally and economically superior to fossil fuel conversion.
Lateral flow device for water fecal pollution assessment: from troubleshooting of its microfluidics using bioluminescence to colorimetric monitoring of generic Escherichia coli
Authors: Bergua José Francisco , Hu Liming , Fuentes-Chust Celia , Álvarez-Diduk Ruslan , Hassan Abdelrahim H. A. , Parolo Claudio , Merkoçi Arben
Published: May 2021

Rapid detection of E. coli species as an indicator of water fecal pollution.
An integrated microfluidic platform for detection of ovarian clear cell carcinoma mRNA biomarker FXYD2
Authors: Chung Yi-Da , Liu Ting-Hang , Liang Yu-Ling , Lin Chang-Ni , Hsu Keng-Fu , Lee Gwo-Bin
Published: May 2021

Molecular diagnostic procedures including cancer cell isolation, RNA extraction, and qRT-PCR plus detection were automated on the integrated microfluidic system.
Recent advances in the adsorptive remediation of wastewater using two-dimensional transition metal carbides (MXenes): a review
Authors: Yaqub Azra , Shafiq Qamar , Khan Abdul Rehman , Husnain Syed M. , Shahzad Faisal
Published: May 2021

MXenes, since their discovery in 2011, have garnered significant research attention for a variety of applications due to their exciting physico-chemical properties.
An overview of the reactions involving azomethine imines over half a decade
Authors: Deepthi Ani , Thomas Noble V. , Sruthi S. L.
Published: May 2021

Azomethine imines constitute a versatile class of 1,3-dipoles which was used extensively for biologically relevant N-heterocycle synthesis – a five-year recap.
A microenvironment-mediated Cu2O–MoS2nanoplatform with enhanced Fenton-like reaction activity for tumor chemodynamic/photothermal therapy
Authors: Pidamaimaiti Guligena , Huang Xiaoyu , Pang Kai , Su Zhi , Wang Fu
Published: May 2021

Chemodynamic therapy (CDT) with selective therapeutic and minimal side effects has attracted increasing attention in recent years.
High-sensitive detection of fluorene by ambient ionization mass spectrometry
Authors: He Jing , Wang Wenxin , Zhang Hong , Yu Kai , Kan Guangfeng , Wang Yingying , Guo Changlu , Liu Junyu , Jiang Jie
Published: May 2021

High sensitive analysis for fluorene at the sub-ng L−1 level in real water samples was achieved by nebulization-dielectric barrier discharge ionization.
Magnetic and dielectric property control in the multivalent nanoscale perovskite Eu0.5Ba0.5TiO3
Authors: Farahmand Nasim , McGinn Christine K. , Zhang Qize , Gai Zheng , Kymissis Ioannis , O'Brien Stephen
Published: May 2021

We report nanoscale Eu0.5Ba0.5TiO3, a multiferroic in the bulk and candidate in the search to quantify the electric dipole moment of the electron.
Multiscale simulations of the hydration shells surrounding spherical Fe3O4nanoparticles and effect on magnetic properties
Authors: Liu Hongsheng , Siani Paulo , Bianchetti Enrico , Zhao Jijun , Di Valentin Cristiana
Published: May 2021

Three hydration shells exist around the nanoparticle and 43% of water molecules in the first hydration shell dissociate. In water, Fe3O4nanoparticles become more crystalline and the total magnetic moment increases.
A general approach to realizing perovskite nanocrystals with insulating metal sulfate shells
Authors: Gao Feng , Wu Jianghua , Zhao Yilin , Song Tinglu , Deng Zhengtao , Wang Peng , Wang Yonggang , Li Hongbo
Published: May 2021

Perovskite nanocrystals with an insulating metal sulfate shell are synthesized. These novel core/shell structured nanocrystals show highly reduced energy transfer in film and suppressed halide exchange in solution.
Correction: Seaming the interfaces between topologically distinct metal–organic frameworks using random copolymer glues
Authors: Wang Fang , Wang Hongliang , Li Tao
Published: May 2021

Correction for ‘Seaming the interfaces between topologically distinct metal–organic frameworks using random copolymer glues’ by Fang Wang et al., Nanoscale, 2019, 11, 2121–2125, DOI: 10.1039/C8NR09777A.
Biobased polymers derived from itaconic acid bearing clickable groups with potent antibacterial activity and negligible hemolytic activity
Authors: Chiloeches A. , Funes A. , Cuervo-Rodríguez R. , López-Fabal F. , Fernández-García M. , Echeverría C. , Muñoz-Bonilla A.
Published: May 2021

We report the synthesis of new biobased polymers derived from itaconic acid with excellent antibacterial activity against Gram-positive bacteria and very low hemotoxicity.
Tough double-network elastomers with slip-rings
Authors: Chen Zhi-Hui , Fan Shu-Ting , Qiu Zhen-Jiang , Nie Zi-Jun , Zhang Shao-Xia , Zhang Sheng , Li Bang-Jing , Cao Ya
Published: May 2021

In order to surmount the inherent trade-off between toughness and stiffness for most elastomers, we developed a strategy which let two polymer networks form an interpenetrated structure through introducing slip-rings by a very simple one-step synthesis method.
The influence of 2-acrylamidephenylboronic acid on the phase behaviour of its copolymers with N-isopropylacrylamide in aqueous solution
Authors: Gosecki Mateusz , Ziemczonek Piotr , Maczugowska Paulina , Czaderna-Lekka Anna , Kozanecki Marcin , Gosecka Monika
Published: May 2021

In this study, we report the synthesis and phase behaviour of statistical p(N-isopropylacrylamide-co-2-acrylamidephenylboronic acid), P(NIPAM-co-2-AAPBA) copolymers.
Locally controlling dynamic exchange reactions in 3D printed thiol-acrylate vitrimers using dual-wavelength digital light processing
Authors: Rossegger Elisabeth , Moazzen Khadijeh , Fleisch Mathias , Schlögl Sandra
Published: May 2021

A photolatent transesterification catalyst is applied to locally switch on and control topological rearrangements in 3D printable thiol-acrylate vitrimers.
Structural variation of self-assembled lanthanide supramolecular complexes induced by reaction conditions
Authors: Yim King-Him , Yeung Chi-Tung , Wong Ho-Yin , Law Ga-Lai
Published: May 2021

The structural variation of self-assembled lanthanide supramolecular complexes which can be induced by different factors such as concentration, anion and solvent, cationic radii, stoichiometric ratio and light.
A zinc-dependent switching mechanism from an open to a new closed-state conformation of insulin-degrading enzyme
Authors: Abramov-Harpaz Karina , Miller Yifat
Published: May 2021

The switching mechanism between an open-state conformation and a newly closed-state conformation of IDE is stabilized by electrostatic interactions between domain D1 and domain D3.
In situ observation of the evolution of polyaromatic tar precursors in packed-bed biomass pyrolysis
Authors: Chelang'at Mosonik Maryanne , Volpe Roberto , Ezenwajiaku Chinonso , Talibi Midhat , Balachandran Ramanarayanan
Published: May 2021

In situ planar laser-induced fluorescence (PLIF) shows the effects of pyrolysis peak temperature and holding time on the formation of 3–5 rings polyaromatic hydrocarbons (PAHs) in the vapour phase during pyrolysis of biomass samples.
Interplay between chromophore binding and domain assembly by the B12-dependent photoreceptor protein, CarH
Authors: Camacho Inês S. , Black Rachelle , Heyes Derren J. , Johannissen Linus O. , Ramakers Lennart A. I. , Bellina Bruno , Barran Perdita E. , Hay Sam , Jones Alex R.
Published: May 2021

The function of the bacterial photoreceptor protein, CarH, is regulated by changes to its oligomeric state. Camacho et al. detail how binding of vitamin B12 in the dark drives assembly of the protein tetramer that in turn blocks transcription.
Relative Clause Sentence Comprehension by Japanese-Speaking Children With and Without Specific Language Impairment
Authors: Sasaki Miho , Schwartz Richard G. , Hisano Masaki , Suzuki Makihiko
Published: May 2021

Purpose

This study investigated the auditory comprehension of Japanese sentences including relative clauses (RCs) by 52 Japanese-speaking children with typical development (TD) and 16 children with specific language impairment (SLI).

Method

A picture-pointing task measured RC and main clause (MC) comprehension for object and subject relatives in sentences with varying lengths. The accuracy of RC only, MC only, and combined comprehension (RC and MC) was analyzed with linear mixed-effects (logistic) models to examine accuracy and the effects of the deep gap–filler distance (structural complexity), the surface linear distance, and sentence length for the two participant groups. Six language tests and two working memory tests were administered to determine language and working memory status. A factor analysis grouped them into two factors that were examined as predictors of comprehension performance.

Results

Initial models indicated that children with SLI performed more poorly than their peers with TD. Working memory abilities predicted the comprehension of subject and object relative sentences, but language abilities other than a general measure of sentence comprehension were only limited predictors. In a series of pairwise comparisons, children with SLI did not exhibit comprehension facilitation for RC sentences with lower structural complexity, nor did they exhibit comprehension facilitation when the linear distance between the gap and the filler was shorter, perhaps because of their overall lower performance. Children with TD made more errors on sentences with higher structural complexity but did not exhibit any linear distance effects. Neither group exhibited effects of noun phrase or sentence length.

Conclusions

Japanese-speaking children with TD exhibited negative comprehension effects of increased deep structure complexity, but not of linear surface distance or sentence noun phrase length. The children with SLI face challenges in comprehending both subject and object relative sentences compared to their typically developing peers. Their poorer working memory abilities are the primary factor that constrains their performance.
Research on method of periodic signal tracking and parameter tuning of the electro‐hydraulic position system
Authors: Li Hongzhang , Zeng Le , Yang Jun
Published: May 2021

Aiming at the tracking accuracy and hysteresis of the periodic displacement signal in electro‐hydraulic servo system, a new type of repetitive PID control strategy (RPID) was proposed. The RPID controller is based on repetitive control and PID control. By linearizing the non‐linear model and employing the Lyapunov stability theorem, the proportional value and the maximum shear frequency of the RPID controller are calculated, and the integral and differential coefficients are obtained through repeated debugging on the system. Comparison experiments of PID and RPID controllers were carried out on the experimental platform of electro‐hydraulic servo system. The results show that the error of RPID tracking is less than 0.04 mm after several cycles, which is lower than the error of PID. The tracking hysteresis finally decreases to a tolerable threshold during the tracking process with RPID controller, which greatly improves the periodic position tracking characteristics of electro‐hydraulic servo system.
Linear-quadratic optimal control for backward stochastic differential equations with random coefficients
Authors: Sun Jingrui , Wang Hanxiao
Published: May 2021

This paper is concerned with a linear-quadratic (LQ, for short) optimal control problem for backward stochastic differential equations (BSDEs, for short), where the coefficients of the backward control system and the weighting matrices in the cost functional are allowed to be random. By a variational method, the optimality system, which is a coupled linear forward-backward stochastic differential equation (FBSDE, for short), is derived, and by a Hilbert space method, the unique solvability of the optimality system is obtained. In order to construct the optimal control, a new stochastic Riccati-type equation is introduced. It is proved that an adapted solution (possibly non-unique) to the Riccati equation exists and decouples the optimality system. With this solution, the optimal control is obtained in an explicit way.
Development Model of Urban Ecological Transportation An Analysis Based on Beijing
Authors: Yuqing Zhang
Published: May 2021

Transportation is a kind of derived demand from social and economic activities. The transportation demand has been increasing with the rapid development of China's economy. Meanwhile it has resulted in some negative problems, especially in cities. Based on fully understanding of the connotation and theoretical foundation of urban transportation and ecological transportation, this paper summarizes the typical urban ecological transportation development mode, analyzes the mode selection and development status of Beijing and finally puts forward some relevant development suggestions.
Research on the tourism follow-up effect of Guangzhou Asian Games
Authors: Qiang Xu
Published: May 2021

Event tourism is the combination of events and tourism, and is one of the main forms of modern tourism. Sports event tourism is one of the types of event tourism. The holding of sports events can greatly promote the development of tourism in the host area, and realize the comprehensive improvement of the economic, social and environmental benefits of the host area. However, after the end of the event, a large number of stadiums are idle or underutilized, and the event tourism is terminated due to the end of the event, which makes the development of tourism in the host city fluctuate, that is, "post event effect". Taking the Guangzhou Asian Games as an example, this paper summarizes the tourism follow-up benefits of the games, then find out the follow-up negative effect reasons and the operating mechanism, at the end, puts forward the Countermeasures for sustainable development.
The Comparative Study on Elasticity of Traffic Congestion Delay Cost in Beijing, Shanghai and Guangzhou
Authors: Zheyi Su , Junmin Wu
Published: May 2021

This paper proposes the traffic congestion delay cost elasticity concept based on the elastic theory, and analyzes the relationship between traffic congestion delay cost and other influence factors, these factors are: city scale, urban facilities, urban public transport, urban automobile volume, urban road accidents, urban exhaust and urban transportation energy consumption. In this paper, according to the data about Beijing, Shanghai and Guangzhou from 2016 to 2017, the quantitatively study of the elasticity of traffic congestion delay cost was conducted, and the relevant comparison and analysis are made. After that, we put forward countermeasures and suggestions to alleviate urban traffic congestion.
Research on the Evaluation and Development Strategy of Environmental Logistics in Hebei Province
Authors: Liu ZiYu , Xue JianYue
Published: May 2021

Environmental logistics has become the irreversible trend of logistics development in the future, and it is also an inevitable choice to promote the transformation of China's modern logistics industry. Regions that want to develop environmental logistics must scientifically evaluate the current status of environmental logistics development. This paper builds a regional environmental logistics evaluation system, horizontally compares the data of Hebei Province and 13 other provinces in 2017, and longitudinal evaluation of data from 2013 to 2017 in Hebei Province, and obtains the ranking of the development status of environmental logistics in Hebei Province and its development trend in the past five years. Based on the evaluation results, countermeasures and suggestions are proposed for improving the level of environmental logistics in Hebei Province, including increasing the comprehensive utilization rate of waste; reinforcing the investment in related fixed assets; reducing the energy consumption of the logistics industry; improving the operating mileage of public railways, and increasing the freight volume.
Research on the Innovation Strategy of Beijing Night Culture Tourist Area Based on Tourist Survey
Authors: Qi Li
Published: May 2021

With the diversified trend of tourism demand in Beijing and the rising tide of night economic development in recent years, the famous cultural tourism scenic spots in Beijing have gradually become the hot spot of night tourism development, and night cultural tourism is more and more favored by tourists. At the same time, the night tourism market of Beijing cultural tourism destination is affected by such reasons as insufficient planning perfection, low level of employees, imperfect supply of environmental facilities and so on, and there are still many problems in the development of tourism market in the area. This paper uses the method of network text analysis to obtain the tourists' feedback information from the tourism online platform, and analyzes the collected data by using the rose data software, and then studies the consumption demand of Beijing night cultural tourism destinations and the tourism perception image of night tourism destinations. It is found that there are passenger congestion, low service quality and strict commercialization in Beijing's famous cultural tourism destinations This kind of problem has a real impact on tourists' perception and willingness to revisit. Based on the findings of the above problems, combined with the domestic research on the development of night economy, this paper puts forward relevant suggestions on the development and improvement of tourism products in Beijing cultural tourism destinations, so as to better identify the quality of destinations and tourists' needs, and analyze the opportunities and challenges that may be faced in the development process of Beijing night tourism destinations, providing reference for the development of Beijing night tourism in the future.
Research on Evaluation and Improvement of Perceived Value of Study Tour for Primary and Middle School Students
Authors: Li Li
Published: May 2021

The student perceived value is an important criterion for evaluating the success of study tour. Firstly, the paper reviews domestic and foreign literature to define the concept and connotation of perceived value of study tour for primary and middle school students. Secondly, the paper summarizes the measurement scale of perceived value of study tour, and constructs a conceptual model. Then, it conducts questionnaire survey of 260 primary and middle school students in Chongqing, and makes statistical analysis on the survey data. The results show that, primary and middle school student perceived value of study tour in Chongqing is at the upper-middle level, but there is much room for improvement in ability value and emotional value. Finally, from two aspects, the paper proposes some countermeasure for improving the perceived value of study tour for primary and middle school students in Chongqing.
Research on Patent Protection of Business Model under the Background of Internet
Authors: Zhou Zhide , Li Chunxue
Published: May 2021

"Internet +" is a disruptive technological innovation that brings unlimited possibilities for business model innovation. However, the lack of the patent protection system of the business model has hindered the innovation and development of the business model to a certain extent. From the perspective of the Internet + business model, this article briefly describes the current status and shortcomings of the protection of business model patents in China, and puts forward some thoughts and suggestions on establishing an Internet + business model to form a business model patent protection system.
A Study on the Level of High-Quality Development in Tibet Based on the Satisfaction of Government Quality Work
Authors: Siyue Liu
Published: May 2021

This paper explores the level of high-quality economic development in the Tibet Autonomous Region in 2019 by using the quantitative method and taking the public satisfaction of government quality work as the path. The article holds that the Tibet Autonomous Region's economy is developing at a high speed, but the level of high-quality economic development is still at a relatively satisfactory level and there is still much room for improvement. Generally speaking, the level of environmental quality satisfaction is higher, followed by the level of service quality, engineering quality and product quality satisfaction, and the level of quality consciousness satisfaction is lower. In addition to the structural factors such as backward production capacity, the micro-factors such as product qualification rate and engineering safety have a great influence on the high-quality development of Tibet.
Research and Application on the Third Party Quality Monitoring for Social Public Service: A Case Study of Survey Data in Liaoning Province
Authors: Jingxing Liao , Lei Feng , Siyue Liu
Published: May 2021

To monitor study and analyze the social public service quality is conducive to promote the construction of a service-oriented government that is satisfactory to the people. In this paper, third-party quality monitoring was conducted in 14 cities of Liaoning Province from 11 public service fields such as living environment, public transportation, infrastructure, medical and health care, public security, culture and sports, compulsory education, pension service, employment service, social security and administrative convenience. The results showed that the public’s satisfaction with social security, compulsory education, living environment, public security and employment services was low, which needed to be paid attention to and further improved by Liaoning Provincial Government.
Research on the Problems Existing in China's Transportation Structure and Optimization Policy
Authors: Chen Shuying
Published: May 2021

At present, highway transportation is the main mode of transportation in China, but highway transportation has the problem of high cost, energy consumption and pollution. Although China has put forward the development policy of public transit railway, it still needs some time to achieve this goal. This paper studies the traffic structure from the middle level; combined with empirical analysis, it is concluded that railway transport has a greater impact on national income than road transport; the existing problems and causes of China's transportation structure are analyzed and the optimization policies are put forward.
Research on the System Symbiotic Evolution Equation of Maritime Transportation Economic Belt with Specific Scale Variables
Authors: Wang Wen
Published: May 2021

In order to study the relationship between marine transportation and the development of coastal areas and their evolutionary trends, the part of maritime transportation is expanded in the theory of transportation economic belt. This paper takes the shipping volume of the shipping passage and the landward depth of the economic belt as the symbiotic scale variables, and establishes the unilateral non independent symbiosis evolution logistic equation of maritime transport economic belt. A quantitative approach is proposed to get the form of the interaction coefficients of the variables with theories of transportation economy, plume model, and calculus etc., solving the unknown coefficients, then obtains the increasing and decreasing factors of the interaction coefficients. Results show that the interaction coefficients of both scale variables decrease with the increase of their values.
Research about the impact of transportation infrastructure on economic growth in a transportation power
Authors: Weizheng Yang
Published: May 2021

This paper selected the 2008-2018 panel data of 31 provinces, cities, autonomous regions throughout the country, adopted fixed effects model and used moderating effect to study the influence of traffic infrastructure on economic growth. And the research has found: From the national perspective, roads perform better than railways on economic growth and railway's leading role of the economy increases gradually; In terms of regulating effect, the effect of railway on economy is more restricted by the level of urbanization, and the higher the level of urbanization, the more significant the effect; In terms of control variables, labor input and investment level significantly promote economic growth.
Analysis of Wholesale Industry efficiency in Liaoning Province -- Based on DEA model
Authors: Li Qingman , Yan Xiuli
Published: May 2021

Based on DEA model, the wholesale efficiency of 14 cities in Liaoning province was measured. From the perspective of input and output, the wholesale efficiency of each city in Liaoning Province was systematically studied to evaluate the development of the wholesale industry in Liaoning Province. The results show that the wholesale efficiency in Liaoning province is generally low, but the returns to scale are increasing. The efficiency level varies greatly among different cities, and the reasons for non-DEA effective wholesale investment in different cities are different.
Analysis of Influencing Factors of China's Agricultural Products Exports to SCO Based on CMS Model
Authors: Sun Huiqing , Zhong Qingrou , Yang Ling
Published: May 2021

This article applies CMS model and selects the data about exports of agricultural products to all the other members of Shanghai Cooperation Organization (SCO) except for China from 1998 to 2018 to decompose the influencing factors of exports of agricultural products from China to all the other members of SCO. The results show that the competitiveness effects plays an important role in promoting the growth of exports while structural change effects is the inhibition effect.