Publications by authors named "Jun Yuan"

467 Publications

A Quinoxaline-Based D-A Copolymer Donor Achieving 17.62% Efficiency of Organic Solar Cells.

Adv Mater 2021 Apr 29:e2100474. Epub 2021 Apr 29.

Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

Side-chain engineering has been an effective strategy in tuning electronic energy levels, intermolecular interaction, and aggregation morphology of organic photovoltaic materials, which is very important for improving the power conversion efficiency (PCE) of organic solar cells (OSCs). In this work, two D-A copolymers, PBQ5 and PBQ6, are designed and synthesized based on bithienyl-benzodithiophene (BDTT) as the donor (D) unit, difluoroquinoxaline (DFQ) with different side chains as the acceptor (A) unit, and thiophene as the π-bridges. PBQ6 with two alkyl-substituted fluorothiophene side chains on the DFQ units possesses redshifted absorption, stronger intermolecular interaction, and higher hole mobility than PBQ5 with two alkyl side chains on the DFQ units. The blend film of the PBQ6 donor with the Y6 acceptor shows higher and balanced hole/electron mobilities, less charge carrier recombination, and more favorable aggregation morphology. Therefore, the OSC based on PBQ6:Y6 achieves a PCE as high as 17.62% with a high fill factor of 77.91%, which is significantly higher than the PCE (15.55%) of the PBQ5:Y6-based OSC. The PCE of 17.62% is by far one of the highest efficiencies for the binary OSCs with polymer donor and Y6 acceptor.
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http://dx.doi.org/10.1002/adma.202100474DOI Listing
April 2021

An overview of high-performance indoor organic photovoltaics.

ChemSusChem 2021 Apr 25. Epub 2021 Apr 25.

Chipsemi Semiconductor Company, IC design department, CHINA.

In recent years, indoor organic photovoltaics (IOPVs) have attracted increasing attention because of their ability to power microelectronic devices and sensors, especially for the internet of things (IoT). In contrast with silicon-based indoor PV, the IOPVs exhibit better performance due to their tunable bandgap via molecular design which could achieve a better spectrum matched with the lighting sources. Based on the simulated PCE in theory, the maximum value can achieve over 50% under the white LED illumination, which is much higher than the practically top PCE of 31%, indicating there is room further to improve the performance of IOPVs by various optimization methods. Based on these benefits, we summarize the recent progress in IOPVs with different methods and shed light on the remaining challenges for achieving practical applications in the future. In the end, some guidelines for the development of IOPVs are proposed.
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http://dx.doi.org/10.1002/cssc.202100386DOI Listing
April 2021

The effect of cardiovascular disease and acute cardiac injury on fatal COVID-19: a meta-analysis.

Am J Emerg Med 2021 Apr 20;48:128-139. Epub 2021 Apr 20.

Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China. Electronic address:

Background: With the continuance of the global COVID-19 pandemic, cardiovascular disease (CVD) and cardiac injury have been suggested to be risk factors for severe COVID-19.

Objective: The aim is to evaluate the mortality risks associated with CVD and cardiac injury among hospitalized COVID-19 patients, especially in subgroups of populations in different countries.

Methods: A comprehensive systematic literature search was performed using 9 databases from November 1, 2019 to November 9, 2020. Meta-analyses were performed for CVD and cardiac injury between non-survivors and survivors of COVID-19.

Results: Although the prevalence of CVD in different populations was different, hospitalized COVID-19 patients with CVD were at a higher risk of fatal outcomes (OR = 2.72; 95% CI 2.35-3.16) than those without CVD. Separate meta-analyses of populations in four different countries also reached a similar conclusion that CVD was associated with an increase in mortality. Cardiac injury was common among hospitalized COVID-19 patients. Patients with cardiac injury had a significantly higher mortality risk than those without cardiac injury (OR = 13.25; 95% CI: 8.56-20.52).

Conclusions: Patients' CVD history and biomarkers of cardiac injury should be taken into consideration during the hospital stay and incorporated into the routine laboratory panel for COVID-19.
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http://dx.doi.org/10.1016/j.ajem.2021.04.013DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8056484PMC
April 2021

FRIZZY PANICLE defines a regulatory hub for simultaneously controlling spikelet formation and awn elongation in bread wheat.

New Phytol 2021 Apr 10. Epub 2021 Apr 10.

State Key Laboratory for Agrobiotechnology and Key Laboratory of Crop Heterosis and Utilization (MOE) and Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, Beijing, 100193, China.

Grain yield in bread wheat (Triticum aestivum L.) is largely determined by inflorescence architecture. Zang734 is an endemic Tibetan wheat variety that exhibits a rare triple spikelet (TRS) phenotype with significantly increased spikelet/floret number per spike. However, the molecular basis underlying this specific spike morphology is completely unknown. Through map-based cloning, the causal genes for TRS trait in Zang734 were isolated. Furthermore, using CRISPR/Cas9-based gene mutation, transcriptome sequencing and protein-protein interaction, the downstream signalling networks related to spikelet formation and awn elongation were defined. Results showed that the null mutation in WFZP-A together with deletion of WFZP-D led to the TRS trait in Zang734. More interestingly, WFZP plays a dual role in simultaneously repressing spikelet formation gene TaBA1 and activating awn development genes, basically through the recruitments of chromatin remodelling elements and the Mediator complex. Our findings provide insights into the molecular bases by which WFZP suppresses spikelet formation but promotes awn elongation and, more importantly, define WFZP-D as a favourable gene for high-yield crop breeding.
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http://dx.doi.org/10.1111/nph.17388DOI Listing
April 2021

The Fungi-specific histone Acetyltransferase Rtt109 mediates morphogenesis, Aflatoxin synthesis and pathogenicity in Aspergillus flavus by acetylating H3K9.

IMA Fungus 2021 Apr 7;12(1). Epub 2021 Apr 7.

Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, and College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

Aspergillus flavus is a common saprophytic filamentous fungus that produces the highly toxic natural compound aflatoxin during its growth process. Synthesis of the aflatoxins, which can contaminate food crops causing huge losses to the agricultural economy, is often regulated by epigenetic modification, such as the histone acetyltransferase. In this study, we used Aspergillus flavus as an experimental model to construct the acetyltransferase gene rtt109 knockout strain (△rtt109) and its complementary strain (△rtt109·com) by homologous recombination. The growth of △rtt109 was significantly suppressed compared to the wild type (WT) strain and the △rtt109·com strain. The sclerotium of △rtt109 grew smaller, and the amount of sclerotia generated by △rtt109 was significantly reduced. The number of conidiums of △rtt109 was significantly reduced, especially on the yeast extract sucrose (YES) solid medium. The amount of aflatoxins synthesized by △rtt109 in the PDB liquid medium was significantly decreased We also found that the △rtt109 strain was extremely sensitive to DNA damage stress. Through the maize seed infection experiment, we found that the growth of △rtt109 on the surface of affected corn was largely reduced, and the amount of aerial mycelium decreased significantly, which was consistent with the results on the artificial medium. We further found that H3K9 was the acetylated target of Rtt109 in A. flavus. In conclusion, Rtt109 participated in the growth, conidium formation, sclerotia generation, aflatoxin synthesis, environmental stress response, regulation of infection of A. flavus. The results from this study of rtt109 showed data for acetylation in the regulation of life processes and provided a new thought regarding the prevention and control of A. flavus hazards.
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http://dx.doi.org/10.1186/s43008-021-00060-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8025522PMC
April 2021

An effective, green and mild deproteinization method for polysaccharides of Ruditapes philippinarum by attapulgite-based silk fibroin composite aerogel.

Int J Biol Macromol 2021 Mar 29;182:343-353. Epub 2021 Mar 29.

Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai'an 223003, PR China; National & Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Huaiyin Institute of Technology, Huai'an 223003, PR China. Electronic address:

A large amount of protein impurity severely restricts the application of polysaccharides of Ruditapes philippinarum (PRP) in food and medicine. Moreover, the traditional Sevag deproteinization method always involves organic reagents. The purpose of this paper was to develop an effective, green and mild deproteinization method from PRP by attapulgite-based silk fibroin composite aerogel (ASA). Firstly, ASA was synthesized and applied to remove protein from PRP. Secondly, the deproteinization parameters were optimized with selectivity coefficient as index as follows: dose of ASA 1% and pH 7.0. Under these conditions, deproteinization ratio (Dr%), polysaccharide recovery ratio (Rr%) and selectivity coefficient (Kc) reached 79.44 ± 1.87%, 95.81 ± 2.95% and 18.95 ± 1.55, respectively. Next, the feasibility of ASA method was evaluated. As a result, ASA method not only achieved higher deproteinization efficiency in less time compared with Sevag method, but also retained structure and antioxidant activity of polysaccharides. ASA was also proven with recycling ability and could be reused more than five times. Furthermore, it was found that protein adsorption on ASA was better fitted by pseudo second-order kinetic and Freundlich model. Taking together, the data implied that ASA method would be promising of deproteinization from PRP suitable for polysaccharides processing.
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http://dx.doi.org/10.1016/j.ijbiomac.2021.03.163DOI Listing
March 2021

Immune memory in convalescent patients with asymptomatic or mild COVID-19.

Cell Discov 2021 Mar 25;7(1):18. Epub 2021 Mar 25.

Key Laboratory of Molecular Biology on Infectious Diseases, Ministry of Education, Chongqing Medical University, Chongqing, 400016, China.

It is important to evaluate the durability of the protective immune response elicited by primary infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Here, we systematically evaluated the SARS-CoV-2-specific memory B cell and T cell responses in healthy controls and individuals recovered from asymptomatic or symptomatic infection approximately 6 months prior. Comparatively low frequencies of memory B cells specific for the receptor-binding domain (RBD) of spike glycoprotein (S) persisted in the peripheral blood of individuals who recovered from infection (median 0.62%, interquartile range 0.48-0.69). The SARS-CoV-2 RBD-specific memory B cell response was detected in 2 of 13 individuals who recovered from asymptomatic infection and 10 of 20 individuals who recovered from symptomatic infection. T cell responses induced by S, membrane (M), and nucleocapsid (N) peptide libraries from SARS-CoV-2 were observed in individuals recovered from coronavirus disease 2019 (COVID-19), and cross-reactive T cell responses to SARS-CoV-2 were also detected in healthy controls.
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http://dx.doi.org/10.1038/s41421-021-00250-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7993859PMC
March 2021

Biochar's Leacheates Affect the Abscisic Acid Pathway in Rice Seedlings Under Low Temperature.

Front Plant Sci 2021 4;12:646910. Epub 2021 Mar 4.

Liaoning Biochar Engineering and Technology Research Center, Shenyang Agricultural University, Shenyang, China.

Organic molecules of biochar's leacheates are known to increase the cold resistance of rice seedlings. Yet, it remains unclear whether the organic molecules of biochar leacheates can interact with the abscisic acid (ABA) signaling pathway associated with low temperature. This study used experiments and bioinformatics (molecular docking) to determine which of the organic molecules of biochar's leacheates could influence the ABA signaling pathway. Specifically, we investigated whether these molecules affected ABA, a plant hormone linked to cold resistance. The contents of endogenous ABA and its precursor carotenoids were determined under low-temperature stress (10°C) and treatment with different concentrations of biochar leacheates. With increased leacheate concentrations, the endogenous ABA and carotenoid contents also increased, as did the expression of ABA- and cold-related genes. When rice seedlings were instead treated with exogenous ABA, it also affected the above-measured indexes; hence, we surmised that certain water-soluble organic molecules of biochar could exert a similar effect as ABA. We first used gas chromatography/mass spectrometry (GC/MS) to identify the organic molecules in the biochar extract, and then we used molecular docking software Autodock to show how they interact. We found that the molecule (1R, 2R, 4S)-2-(6-chloropyridin-3-yl)-7-azabicyclo(2.2.1)heptane was simplified, as Cyah could dock with the ABA receptor protein OsPYL2 in rice, which shows Cyah in biochar is probably an analog of ABA, with a similar function. Based on these results, we conclude that organic molecules of biochar's leacheates could enter into rice plants and interact with ABA-related proteins to affect the ABA signaling pathway, thereby improving the cold stress resistance of plants.
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http://dx.doi.org/10.3389/fpls.2021.646910DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7970111PMC
March 2021

species (Pleosporales: Didymellaceae) associated with in Guangxi Province, China.

Biodivers Data J 2021 1;9:e63643. Epub 2021 Mar 1.

Department of Plant Pathology, Agricultural College, Guizhou University, Guiyang, China Department of Plant Pathology, Agricultural College, Guizhou University Guiyang China.

Background: belongs to the family Acanthaceae and is a widely distributed dicotyledonous plant in tropical and subtropical regions. Three isolates of (Dothideomycetes, Pleosporales, Didymellaceae) were collected from leaves of in Guangxi Province, China.

New Information: Phylogenetic analyses of a combined ITS-LSU-- dataset indicate that one of our three strains represents an undescribed species with close affinity to and the other two strains clustered amongst other isolates of . Evidence from morphology and sequence analysis indicates that GUCC 2070.7 is a new species that we introduce here as . This is the first report about taxa of from this host plant.
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http://dx.doi.org/10.3897/BDJ.9.e63643DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7940324PMC
March 2021

One-Step Construction of a Hollow Au@Bimetal-Organic Framework Core-Shell Catalytic Nanoreactor for Selective Alcohol Oxidation Reaction.

ACS Appl Mater Interfaces 2021 Mar 3;13(10):12463-12471. Epub 2021 Mar 3.

National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei 230029, P. R. China.

Hollow core-shell catalytic nanoreactors have received tremendous attention due to their high mass transfer in catalysis applications. Herein, we present a novel type of well-arranged, hollow core-shell nanoreactors featured with a bimetallic porous Zn/Ni-MOF-2 shell and a tiny Au nanoparticle core. The well-designed hollow Au@Zn/Ni-MOF-2 nanoreactors were constructed through the strategy of a facile one step from a rare crystal-structure transformation without any additional template. These nanoreactors exhibit outstanding multifunctional catalysis for a broad range of alcohol oxidation under the green oxidant environment. Moreover, such hollow nanoreactors show excellent recyclability toward the selective alcohol oxidation. These findings might provide a promising platform for a general construct of various metal-organic framework-based hollow core-shell nanostructures and further highly augmented catalytic applications.
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http://dx.doi.org/10.1021/acsami.0c20445DOI Listing
March 2021

Fluorescence emission enhancement of a T-shaped benzimidazole with a mechanically-interlocked 'suit'.

Chem Commun (Camb) 2021 Apr 1;57(26):3239-3242. Epub 2021 Mar 1.

School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, China.

A fluorescent T-shaped benzimidazole was successfully designed and interlocked in a bicyclic macrocycle to form a suit[1]ane through supramolecular templated-synthesis. Compared with the bare fluorophore, suit[1]ane requires nearly two times the concentration to initialize the aggregation-caused quenching effect in solution. Furthermore, an 8-fold higher solid-state fluorescence quantum yield (21.7%) is also achieved. By taking advantage of mechanical bonding and molecular packing, such fluorescence emission enhancement through formation of a suitane opens the way to new complex fluorescent materials.
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http://dx.doi.org/10.1039/d0cc07471cDOI Listing
April 2021

The Impact of Neoadjuvant Hormone Therapy on Surgical and Oncological Outcomes for Patients With Prostate Cancer Before Radical Prostatectomy: A Systematic Review and Meta-Analysis.

Front Oncol 2020 8;10:615801. Epub 2021 Feb 8.

Department of Urology, Affiliated Jiang-yin Hospital of the Southeast University Medical College, Jiang-yin, China.

Objective: This systematic study aimed to assess and compare the comprehensive evidence regarding the impact of neoadjuvant hormone therapy (NHT) on surgical and oncological outcomes of patients with prostate cancer (PCa) before radical prostatectomy (RP).

Methods: Literature searches were performed according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. Using PubMed, Web of Science, Chinese National Knowledge Infrastructure, and Wanfang databases, we identified relevant studies published before July 2020. The pooled effect sizes were calculated in terms of the odds ratios (ORs)/standard mean differences (SMDs) with 95% confidence intervals (CIs) using the fixed or random-effects model.

Results: We identified 22 clinical trials (6 randomized and 16 cohort) including 20,199 patients with PCa. Our meta-analysis showed no significant differences in body mass index (SMD = 0.10, 95% CI: -0.08-0.29, p = 0.274) and biopsy Gleason score (GS) (OR = 1.33, 95% CI: 0.76-2.35 p = 0.321) between the two groups. However, the NHT group had a higher mean age (SMD = 0.19, 95% CI: 0.07-0.31, p = 0.001), preoperative prostate-specific antigen (OR = 0.47, 95% CI: 0.19-0.75, p = 0.001), and clinic tumor stage (OR = 2.24, 95% CI: 1.53-3.29, p < 0.001). Compared to the RP group, the NHT group had lower positive surgical margins (PSMs) rate (OR = 0.44, 95% CI: 0.29-0.67, p < 0.001) and biochemical recurrence (BCR) rate (OR = 0.47, 95% CI: 0.26-0.83, p = 0.009). Between both groups, there were no significant differences in estimated blood loss (SMD = -0.06, 95% CI: -0.24-0.13, p = 0.556), operation time (SMD = 0.20, 95% CI: -0.12-0.51, p = 0.219), pathological tumor stage (OR = 0.76, 95% CI: 0.54-1.06, p = 0.104), specimen GS (OR = 0.91, 95% CI: 0.49-1.68, p = 0.756), and lymph node involvement (OR = 0.76, 95% CI: 0.40-1.45, p = 0.404).

Conclusions: NHT prior to RP appeared to reduce the tumor stage, PSMs rate, and risk of BCR in patients with PCa. According to our data, NHT may be more suitable for older patients with higher tumor stage. Besides, NHT may not increase the surgical difficulty of RP.
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http://dx.doi.org/10.3389/fonc.2020.615801DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7897693PMC
February 2021

Predictive Factors for Positive Surgical Margins in Patients With Prostate Cancer After Radical Prostatectomy: A Systematic Review and Meta-Analysis.

Front Oncol 2020 8;10:539592. Epub 2021 Feb 8.

Department of Urology, Affiliated Jiang-yin Hospital of the Southeast University Medical College, Jiang-yin, China.

Background And Objectives: Previous studies have demonstrated that positive surgical margins (PSMs) were independent predictive factors for biochemical and oncologic outcomes in patients with prostate cancer (PCa). This study aimed to conduct a meta-analysis to identify the predictive factors for PSMs after radical prostatectomy (RP).

Methods: We selected eligible studies the electronic databases, such as PubMed, Web of Science, and EMBASE, from inception to December 2020. The risk factors for PSMs following RP were identified. The pooled estimates of standardized mean differences (SMDs)/odds ratios (ORs) and 95% confidence intervals (CIs) were calculated. A fixed effect or random effect was used to pool the estimates. Subgroup analyses were performed to explore the reasons for heterogeneity.

Results: Twenty-seven studies including 50,014 patients with PCa were eligible for further analysis. The results showed that PSMs were significantly associated with preoperative prostate-specific antigen (PSA) (pooled SMD = 0.37; 95% CI: 0.31-0.43; P < 0.001), biopsy Gleason Score (<6/≥7) (pooled OR = 1.53; 95% CI:1.31-1.79; P < 0.001), pathological Gleason Score (<6/≥7) (pooled OR = 2.49; 95% CI: 2.19-2.83; P < 0.001), pathological stage (
Conclusions: Preoperative PSA, biopsy Gleason Score, pathological Gleason Score, pathological stage, positive lymph node, extraprostatic extension, and seminal vesicle invasion are independent predictors of PSMs after RP. These results may helpful for risk stratification and individualized therapy in PCa patients.
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http://dx.doi.org/10.3389/fonc.2020.539592DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7897672PMC
February 2021

VO Nanoparticles Confined in High-Conductivity and High-Throughput Carbon Nanofiber Nanohybrids for Advanced Sodium-Ion Capacitors.

ACS Appl Mater Interfaces 2021 Mar 16;13(8):10001-10012. Epub 2021 Feb 16.

Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Engineering, University of Jinan, Jinan 250002, China.

Electrode materials with high conductivity and high mass transport rate are highly desirable for a variety of electrochemical energy devices but face a grand challenge to be readily prepared yet. Here, we propose the design and preparation of a nanohybrid of VO nanoparticles embedded in a multichannel carbon nanofiber (VO@MCNF) network with high conductivity and high mass transport. We demonstrate the VO@MCNF shows superior capability for sodium storage with an excellent capacity of 214.3 mA h g even at 5 A g, thanks to its high conductivity for electron transfer and facilitated mass transportation endowed by the one-dimensional conductive multichannel fiber structure. Such favorable structures and properties in VO@MCNFs enable them to be applied as high-performance anodes of sodium-ion hybrid capacitors (SIHCs), successfully addressing the critical kinetics imbalance between Faradaic anodes and capacitive cathodes for application of SIHCs, which show impressively high energy/power densities along with impressive cycling performance over 10,000 cycles.
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http://dx.doi.org/10.1021/acsami.0c21313DOI Listing
March 2021

Duration of SARS-CoV-2 positive in quarantine room environments: A perspective analysis.

Int J Infect Dis 2021 Apr 10;105:68-74. Epub 2021 Feb 10.

Department of Public Health Emergency Response, Guangzhou Center for Disease Control and Prevention, Baiyun District Qi De Road in Guangzhou, Guangdong Province, 510440, China. Electronic address:

Objective: To determine the duration of SARS-CoV-2 persistence in quarantine hotel environments.

Methods: 39 Patients confirmed by RT-PCR were included. We collected clinical features, laboratory test results, smear sample information, and quarantine room information. Genome sequencing and phylogenetic analysis were conducted. We analyzed the factors associated with environmental contamination.

Result: Among 39 COVID-19 cases, 10 were asymptomatic and 37 were imported from aboard. We collected 271 swab samples from environmental surfaces related to observational patients. Eighteen swab samples from seven patients were positive. The highest contamination rates occurred on cups (100%), followed by hand sink (12.82%), toilet seat and flush (7.89%), telephone (5.56%), bedside table (5.56%), and floor drain (5.41%). The results showed that environmental surface contamination was associated with the clinical cycle threshold values for patients (P = 0.01) and the sampling interval time after the cases left their rooms (P = 0.03). The duration of environmental surface contamination was associated with the wet status of the sampling site (P = 0.01).

Conclusion: Our findings showed that environmental contamination might be attributed to the viral load in the respiratory tracts of patients and the sampling interval time after the cases left their rooms. Moist surfaces were more vulnerable to remaining SARS-CoV-2 RNA-positive. Our study highlights the importance of implementing strict chemical disinfection strategies in quarantine rooms.
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http://dx.doi.org/10.1016/j.ijid.2021.02.025DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7872842PMC
April 2021

Body Size Plasticity of Weevil Larvae (Curculio davidi) (Coleoptera: Curculionidae) and Its Stoichiometric Relationship With Different Hosts.

J Insect Sci 2021 Jan;21(1)

School of Agriculture and Biology, Shanghai Jiao Tong University, Minhang, Shanghai, China.

Parasites obtain energy and nutrients from the host, and their body size is also usually limited by host size. However, the regulatory mechanisms that control the plasticity of parasite body sizes and the stoichiometric relationships with their hosts remain unclear. Here we investigated the concentrations of 14 elements (C, H, O, N, P, S, K, Na, Ca, Mg, Al, Fe, Mn, and Zn) in the acorns of three oak species (Quercus spp.), in their endoparasitic weevil (Curculio davidi Fairmaire) (Coleoptera: Curculionidae) larvae and in the larval feces, and the weight of weevil larvae within different hosts in a warm-temperate zone of China. Our results showed that the three acorn species exhibited significant differences in C, H, O, P, K, Mg, and Mn concentrations. However, in the weevil larvae, only P, Mn, and C:P ratio revealed significant differences. Weevil larvae preferentially absorbed and retained N, Zn, Na, and P, whereas Mn, K, Ca, and O were passively absorbed and transported. The weevil larvae weight was associated with acorn stoichiometry, and positively correlated with acorn size. Weevil larvae P decreased, but Mn and C:P increased with their weight, implying highly variable in somatic stoichiometry are coupled with the plasticity of body size. Interestingly, weevil larvae weight was negatively correlated with acorn infection rate, indicating small-size parasitic insects might have higher fitness level in parasite-host systems than larger-size ones. Our results suggest that variation in P, Mn, and C:P in parasites may play critical roles in shaping their body size and in improving their fitness.
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http://dx.doi.org/10.1093/jisesa/ieaa139DOI Listing
January 2021

Predictors of serological cure after penicillin therapy in HIV-negative patients with early syphilis in Shenzhen, China.

PLoS One 2021 28;16(1):e0245812. Epub 2021 Jan 28.

Shenzhen Pingshan Maternal and Child Health Hospital, Shenzhen, China.

Background: Syphilis is a common infectious disease worldwide. Serological monitoring is important for syphilis management. We currently know little about the characteristics of this seronegative response. The aim of this study was to explore the factors associated with serological cure after treatment of early syphilis.

Methods: A retrospective cohort study was conducted and the data of patients with early syphilis in a clinic in Shenzhen from 2011 to 2019 were retrieved. Univariable and multiple Cox proportional hazard regression models were utilized to identify factors associated with a serological cure state among syphilis patients with early syphilis two years after treatment.

Results: A total of 346 (85.9%) syphilis patients achieved serological cure. The multivariate analysis results revealed that having a baseline TRUST titer >1:8 was associated with an increased probability of serological cure, compared with having a baseline TRUST titer ≤1:8 (HR = 1.43, 95% CI = 1.10-1.85, P<0.01); primary syphilis was positively associated with serological cure, compared with participants with latent early syphilis (HR = 1.72, 95% CI = 1.27-2.33, P<0.001).

Conclusions: Two years after treatment, a higher percentage of early syphilis patients achieved serological cure. The study indicated that the syphilis stage and baseline serum titer were crucial factors associated with serological cure.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0245812PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7842941PMC
January 2021

Phenotype, molecular characterisation and risk factors for postoperative meningitis caused by ESBL-producing-Enterobacteriaceae: a six years multi-Centre comparative cohort study.

BMC Infect Dis 2021 Jan 19;21(1):85. Epub 2021 Jan 19.

Department of Clinical Diagnosis, Laboratory of Beijing Tiantan Hospital and Capital Medical University, NO. 119 Nansihuan West road, Fengtai district, Beijing, China.

Background: To determine the phenotype, molecular characterisation and risk factors of postoperative meningitis induced by Extended-spectrum β-lactamase (ESBL)-producing Enterobacteriaceae (EPE) in China.

Methods: We performed a multi-centre comparative cohort study of postoperative meningitis patients infected with Enterobacteriaceae in 4 neurosurgical centres in China from January 2014 to December 2019. Phenotype and molecular characteristics of the isolates were reviewed and tested, and independent risk factors of the EPE meningitis were evaluated by binary logistic regression.

Results: In total, 220 Enterobacteriaceae include 78 EPE were available in this study. 85.6% (67/78) ESBL-related genes were tested, and bla (14.9%) and bla + bla + bla (20.9%) were found to be the most frequent mono and combined ESBL-related genes harboured by Enterobacteriaceae. On binary logistic analysis, craniotomy (OR. 2.583, 95% C.I. 1.274-5.235, P = 0.008) and malignancy (OR. 2.406, 95% C.I. 1.299-4.456, P = 0.005) were the associated independent risk factors to meningitis induced by EPE.

Conclusions: To the best of our knowledge, this is the largest series focusing on risk factors of EPE meningitis which has been conducted in China. Craniotomy and malignancy were independent risk factors for EPE meningitis. The risk factors identified may be further utilized in clinical practice and research to avoid and reduce the mortality in future.
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http://dx.doi.org/10.1186/s12879-021-05784-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7816392PMC
January 2021

Body Size Plasticity of Weevil Larvae (Curculio davidi) (Coleoptera: Curculionidae) and Its Stoichiometric Relationship With Different Hosts.

J Insect Sci 2021 Jan;21(1)

School of Agriculture and Biology, Shanghai Jiao Tong University, Minhang, Shanghai, China.

Parasites obtain energy and nutrients from the host, and their body size is also usually limited by host size. However, the regulatory mechanisms that control the plasticity of parasite body sizes and the stoichiometric relationships with their hosts remain unclear. Here we investigated the concentrations of 14 elements (C, H, O, N, P, S, K, Na, Ca, Mg, Al, Fe, Mn, and Zn) in the acorns of three oak species (Quercus spp.), in their endoparasitic weevil (Curculio davidi Fairmaire) (Coleoptera: Curculionidae) larvae and in the larval feces, and the weight of weevil larvae within different hosts in a warm-temperate zone of China. Our results showed that the three acorn species exhibited significant differences in C, H, O, P, K, Mg, and Mn concentrations. However, in the weevil larvae, only P, Mn, and C:P ratio revealed significant differences. Weevil larvae preferentially absorbed and retained N, Zn, Na, and P, whereas Mn, K, Ca, and O were passively absorbed and transported. The weevil larvae weight was associated with acorn stoichiometry, and positively correlated with acorn size. Weevil larvae P decreased, but Mn and C:P increased with their weight, implying highly variable in somatic stoichiometry are coupled with the plasticity of body size. Interestingly, weevil larvae weight was negatively correlated with acorn infection rate, indicating small-size parasitic insects might have higher fitness level in parasite-host systems than larger-size ones. Our results suggest that variation in P, Mn, and C:P in parasites may play critical roles in shaping their body size and in improving their fitness.
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http://dx.doi.org/10.1093/jisesa/ieaa139DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7780276PMC
January 2021

The relationship between intracranial arterial dolichoectasia and intracranial atherosclerosis.

Clin Neurol Neurosurg 2021 Jan 4;200:106408. Epub 2020 Dec 4.

Department of Neurology, Jiangsu Province Hospital of Chinese Medicine, Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu, China. Electronic address:

Objective: We aimed to investigate the relationship between intracranial arterial dolichoectasia (IADE) and intracranial atherosclerosis (ICAS).

Methods: Patients with acute ischemic stroke were screened via the Nanjing Stroke Registry Program. Patients were diagnosed with IADE (diameter, height of bifurcation, and laterality of basilar artery) based on magnetic resonance imaging (MRI)/magnetic resonance angiography (MRA) results. Intracranial atherosclerosis was defined as a ≥50 % diameter reduction in internal carotid artery, middle cerebral artery, posterior cerebral artery, or anterior cerebral artery on MRA, computed tomography angiography, or digital subtraction angiography. We also evaluated the presence and degree of white matter changes and lacuna infarctions on MRI.

Results: Of the 469 enrolled patients, 61 (13 %) had IADE. Patients with IADE were older (64.1 ± 9.9 vs. 59.6 ± 11.4 years, P = 0.004) and had a higher prevalence of hypertension (78.7 % vs. 61.0 %, P = 0.008) than patients without IADE. Patients with ICAS were older (62.6±10.5 vs 58.1±11.6 years, P < 0.001), had higher prevalence of hypertension (72.9 % vs. 55.0 %, P < 0.001) and a previous history of stroke (21.6 % vs. 9.2 %, P < 0.001), had higher levels of serum low-density lipoprotein cholesterol (2.57±0.82 vs. 2.31±0.86mmol/l P = 0.002), and had high counts of white blood cells (7.90±3.29 vs 7.10±2.44, P = 0.004). No association was detected between IADE and extracranial carotid atherosclerosis [odds ratio (OR)=0.618; 95 % confidence interval (CI), 0.280-1.367; P = 0.235]. After adjusting for age, sex, hypertension, and ischemic heart disease, patients with IADE had a lower ICAS rate than that in those without IADE (OR 0.417, 95 % CI, 0.213-0.816, P = 0.011). Unlike patients with ICAS, patients with IADE were more likely to have infratentorial stroke lesions (OR=2.952, 95 % CI, 1.207-7.223, P = 0.018), multi-lacuna (OR=2.142, 95 % CI, 1.158-3.964, P = 0.015), and white matter changes (OR = 2.782; 95 % CI, 1.522-5.085, P = 0.001).

Conclusions: IADE was associated with advanced age, hypertension, multi-lacuna, and white matter changes but was not associated with ICAS.
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http://dx.doi.org/10.1016/j.clineuro.2020.106408DOI Listing
January 2021

Polydatin alleviates high-fat diet induced atherosclerosis in apolipoprotein E-deficient mice by autophagic restoration.

Phytomedicine 2021 Jan 23;81:153301. Epub 2020 Nov 23.

Jiangsu Key Laboratory of Regional Resource Exploitation and Medicinal Research, Huaiyin Institute of Technology, Huai'an 223003, Jiangsu, PR China.

Background: Polydatin has been reported to possess remarkable anti-atherosclerotic activities. However, there are different opinions on its regulatory mechanisms. It remains unclear whether the anti-atherosclerotic mechanism of polydatin is related to its autophagic restoration or not. The aim of this study was to explore the question.

Methods: Using atherosclerotic model induced by high-fat diet in apolipoprotein E-deficient mice, the investigation was performed with polydatin alone or in combination with autophagic inhibitor or inducer intervention. Inhibitory sites of polydatin to PI3K were identified by molecular docking.

Results: Polydatin can significantly inhibit PI3K/Akt/mTOR pathway proteins expression, improve autophagic dysfunction and reduce atherosclerotic lesions. These effects could be antagonized and reinforced by adding autophagic inhibitor and inducer, respectively. Inhibitory sites of polydatin to PI3K were found to be ASP-810, SER-854, VAL-851, LEU-807, SER-774, LYS-802, ASP-933, SER-919, ASN-920, PHE-930, MEF-922, GLN-859 of PI3Kα.

Conclusions: The mechanism of polydatin to alleviate atherosclerotic lesions was achieved by autophagic restoration.
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http://dx.doi.org/10.1016/j.phymed.2020.153301DOI Listing
January 2021

Patients with SARS-CoV-2 and HBV co-infection are at risk of greater liver injury.

Genes Dis 2020 Nov 18. Epub 2020 Nov 18.

Key Laboratory of Molecular Biology of Infectious Diseases, Chinese Ministry of Education, Chongqing Medical University, Chongqing, China.

To date, it remains unclear if severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) co-infection exacerbates liver injury in patients with chronic hepatitis B virus (HBV) infection. In this study, we present a retrospective study of 133 hospitalized confirmed mild coronavirus disease 2019 (COVID-19) cases, including 116 patients with COVID-19 with negative serum hepatitis B antigen and 17 HBV inactive carriers with COVID-19. We found that there were no significant differences for the discharge rate or duration of hospitalization between the two groups. However, inactive HBV carriers with SARS-CoV-2 co-infection are at a higher risk of abnormal liver function tests. The enhanced liver injury induced by SARS-CoV-2 and HBV co-infection was identified as the hepatocyte type rather than the cholangiocyte type. Moreover, the inflammatory response, including abnormal lactate dehydrogenase, D-dimer and interleukin-6 production, may contribute to this injury following SARS-CoV-2 co-infection. Collectively, SARS-CoV-2 and HBV co-infection exacerbates liver function of the patients with COVID-19.
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http://dx.doi.org/10.1016/j.gendis.2020.11.005DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7672332PMC
November 2020

Effect of different thawing methods on the efficiency and quality attributes of frozen red radish.

J Sci Food Agric 2020 Nov 22. Epub 2020 Nov 22.

State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China.

Background: The thawing process is regarded as an essential step before the consumption of frozen foods. This study aimed to evaluate the possibility of ultrasound thawing of frozen red radish and to explore the characteristics of ultrasound thawing. The influence of low-frequency ultrasound (LFU) on the thawing efficiency of frozen red radish cylinders in air and water mediums was investigated. The effects of different ways of thawing, including air thawing (AT), water thawing (WT), refrigeration thawing (RT), ultrasound-assisted water thawing (UWT), and microwave thawing (MT) on the thawing time and quality of radish samples was studied.

Results: The results showed that thawing time decreased remarkably in air and water mediums assisted by LFU. As the LFU power level increased, the thawing time decreased and the value of the drip loss increased. The firmness of thawed radish samples also decreased significantly compared with the fresh samples. Microwave thawing had the highest thawing rate, but the microstructure of MT radish samples was damaged severely, resulting in the highest drip loss, and the lowest firmness, and vitamin C content. In comparison with the AT, WT, and RT, a significant reduction in thawing time could be achieved for UWT (P < 0.05). Ultrasound-assisted water thawing exhibited the highest retention of color and vitamin C, and a lower destructive effect on the microstructure.

Conclusion: The results showed that LFU could be used as an efficient method to facilitate the thawing process of frozen red radishes, and better preserve the color, vitamin C, and microstructure of the final product. © 2020 Society of Chemical Industry.
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http://dx.doi.org/10.1002/jsfa.10953DOI Listing
November 2020

Human RECQL5 promotes metastasis and resistance to cisplatin in non-small cell lung cancer.

Life Sci 2021 Jan 17;265:118768. Epub 2020 Nov 17.

Department of Pediatrics, Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, Shanghai 201700, PR China. Electronic address:

Non-small cell lung cancer (NSCLC) patients have a lower 5-year survival rate, and the distant tumor metastasis and drug resistance are the main reasons for the high mortality. RECQL5, a member of RecQ helicases family, has been linked to tumorigenesis of various cancers expect NSCLC. In the current study, analysis with the Cancer Genome Atlas (TCGA) dataset showed that the level of RECQL5 was elevated in LUAD (Lung Adenocarcinoma) and LUSC (lung squamous carcinomas), two major subtypes of NSCLC, which was confirmed by immunohistochemistry staining on Tissue array slides. The level of RECQL5 was also elevated in NSCLC cell lines. Further, Kaplan-Meier analysis of TCGA dataset suggested that the up-regulated RECQL5 was associated with poor prognosis of LUAD, but not with that of LUSC. Knockdown of RECQL5 significantly inhibited the invasion and migration of NSCLC cells, and suppressed epithelial-mesenchymal transition (EMT) as indicated by the changes of EMT-related proteins, while overexpression of RECQL5 displayed reverse effects. Lung metastasis was also suppressed by RECQL5 knockdown. Additionally, the addition of Akt inhibitor LY294002 reversed the effects of RECQL5 overexpression on cell migration, invasion and EMT. Moreover, knockdown of RECQL5 increased the apoptosis of cisplatin-resistant A549 cell line (A549/DDP) caused by cisplatin treatment. In summary, RECQL5 contributed to the metastasis of NSCLC and assisted NSCLC cells incompletely response to cisplatin therapy, and could be considered as a biomarker or clinical target for NSCLC.
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http://dx.doi.org/10.1016/j.lfs.2020.118768DOI Listing
January 2021

Ssu72 Regulates Fungal Development, Aflatoxin Biosynthesis and Pathogenicity in .

Toxins (Basel) 2020 11 13;12(11). Epub 2020 Nov 13.

Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

The RNA polymerase II (Pol II) transcription process is coordinated by the reversible phosphorylation of its largest subunit-carboxy terminal domain (CTD). Ssu72 is identified as a CTD phosphatase with specificity for phosphorylation of Ser5 and Ser7 and plays critical roles in regulation of transcription cycle in eukaryotes. However, the biofunction of Ssu72 is still unknown in , which is a plant pathogenic fungus and produces one of the most toxic mycotoxins-aflatoxin. Here, we identified a putative phosphatase Ssu72 and investigated the function of Ssu72 in . Deletion of resulted in severe defects in vegetative growth, conidiation and sclerotia formation. Additionally, we found that phosphatase Ssu72 positively regulates aflatoxin production through regulating expression of aflatoxin biosynthesis cluster genes. Notably, seeds infection assays indicated that phosphatase Ssu72 is crucial for pathogenicity of . Furthermore, the Δ mutant exhibited more sensitivity to osmotic and oxidative stresses. Taken together, our study suggests that the putative phosphatase Ssu72 is involved in fungal development, aflatoxin production and pathogenicity in , and may provide a novel strategy to prevent the contamination of this pathogenic fungus.
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http://dx.doi.org/10.3390/toxins12110717DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7696088PMC
November 2020

The membrane mucin Msb2 regulates aflatoxin biosynthesis and pathogenicity in fungus Aspergillus flavus.

Microb Biotechnol 2021 03 7;14(2):628-642. Epub 2020 Nov 7.

Key Laboratory of Pathogenic Fungi and Mycotoxins of Fujian Province, Key Laboratory of Biopesticide and Chemical Biology of Education Ministry, School of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, 350002, China.

As a pathogenic fungus, Aspergillus flavus can produce carcinogenic aflatoxins (AFs), which poses a great threat to crops and animals. Msb2, the signalling mucin protein, is a part of mitogen-activated protein kinase (MAPK) pathway which contributes to a range of physiological processes. In this study, the roles of membrane mucin Msb2 were explored in A. flavus by the application of gene disruption. The deletion of msb2 gene (Δmsb2) caused defects in vegetative growth, sporulation and sclerotia formation when compared to WT and complement strain (Δmsb2 ) in A. flavus. Using thin-layer chromatography (TLC) and high-performance liquid chromatography (HPLC) analysis, it was found that deletion of msb2 down-regulated aflatoxin B (AFB ) synthesis and decreased the infection capacity of A. flavus. Consistently, Msb2 responds to cell wall stress and osmotic stress by positively regulating the phosphorylation of MAP kinase. Notably, Δmsb2 mutant exhibited cell wall defect, and it was more sensitive to inhibitor caspofungin when compared to WT and Δmsb2 . Taking together, these results revealed that Msb2 plays key roles in morphological development process, stresses adaptation, secondary metabolism and pathogenicity in fungus A. flavus.
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http://dx.doi.org/10.1111/1751-7915.13701DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7936294PMC
March 2021

Hierarchical Multicavity Nitrogen-Doped Carbon Nanospheres as Efficient Polyselenide Reservoir for Fast and Long-Life Sodium-Selenium Batteries.

Small 2020 Dec 4;16(48):e2005534. Epub 2020 Nov 4.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.

Sodium-selenium (Na-Se) battery has been emerging as one of the most prospective energy storage systems owing to their high volumetric energy density and cost effectiveness. Nevertheless, the shuttle effect of sodium polyselenide (NaPSe) and sluggish electrochemical reaction kinetics present the main bottlenecks for its practical implementation. Herein, a new Se host of 3D nitrogen-doped hierarchical multicavity carbon nanospheres (3D NHMCs) is designed and synthesized via a facile self-sacrifice templating strategy. The 3D NHMCs are verified to hold a favorable structure of a hollow macropore core and numerous micro/mesopores hollow shell for hosting Se, which can not only maximize Se utilization and alleviate the volumetric expansion but also promote the electrical/ionic conductivity and electrolyte infiltration. Moreover, the abundant self-functionalized surfaces as an efficient NaPSe scavenger via robust physical-chemical dual blocking effects demonstrate high-efficiency in situ anchoring-diffusion-conversion of NaPSe, rendering rapid reaction kinetics and remarkable suppressive shuttle effect, as evidenced by systematic experimental analysis and density functional theory calculations. As a result, the high-Se-loading 3D NHMCs/Se cathode exhibits an ultrahigh volumetric capacity (863 mAh cm ) and rate capability (377 mAh g at 20 C) and unexceptionable stability over 2000 cycles at 2 C.
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http://dx.doi.org/10.1002/smll.202005534DOI Listing
December 2020

Tool Wear Condition Monitoring by Combining Variational Mode Decomposition and Ensemble Learning.

Sensors (Basel) 2020 Oct 27;20(21). Epub 2020 Oct 27.

Experimental Training, Hebei University of Technology, Tianjin 300401, China.

Most online tool condition monitoring (TCM) methods easily cause machining interference. To solve this problem, we propose a method based on the analysis of the spindle motor current signal of a machine tool. Firstly, cutting experiments under multi-conditions were carried out at a Fanuc vertical machining center, using the Fanuc Servo Guide software to obtain the spindle motor current data of the built-in current sensor of the machine tool, which can not only apply to the actual processing conditions but, also, save costs. Secondly, we propose the variational mode decomposition (VMD) algorithm for feature extraction, which can describe the tool conditions under different cutting conditions due to its excellent performance in processing the nonstationary current signal. In contrast with the popular wavelet packet decomposition (WPD) method, the VMD method was verified as a more effective signal-processing technique according to the experimental results. Thirdly, the most indicative features that relate to the tool condition were fed into the ensemble learning (EL) classifier to establish a nonlinear mapping relationship between the features and the tool wear level. Compared with existing TCM methods based on current sensor signals, the operation process and experimental results show that using the proposed method for the monitoring signal acquisition is suitable for the actual processing conditions, and the established tool wear prediction model has better performance in both accuracy and robustness due to its good generalization capability.
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http://dx.doi.org/10.3390/s20216113DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663253PMC
October 2020

Recent progress in sodium/potassium hybrid capacitors.

Chem Commun (Camb) 2020 Nov 28;56(90):13933-13949. Epub 2020 Oct 28.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China.

Metal ion hybrid capacitors (MIHCs) have been recognized as one of the most promising power sources owing to their combined merits of high energy density in batteries and high power output in supercapacitors. The kinetics mismatch between the capacitor-type cathode and battery-type anode yet must be well addressed before implementing their practical feasibility. Here, we overview the recent progress in sodium and potassium ion hybrid capacitors (SIHCs and PIHCs) and discuss the major challenges and give an outlook on the future directions in this field. The fundamental knowledge and the history will be firstly introduced, and special emphasis is then laid on the development of a variety of electrode materials in recent years. The prospects of future research of MIHCs are finally proposed towards their practical applications. We wish that this feature article can not only educate newcomers starting their reasearch in this field, but also inspire experieced researchers to contribute to the development of high-performance MIHC devices.
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http://dx.doi.org/10.1039/d0cc05476cDOI Listing
November 2020