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  1. Article ; Online: Collective behavior of squirmers in thin films.

    Wu-Zhang, Bohan / Fedosov, Dmitry A / Gompper, Gerhard

    Soft matter

    2024  

    Abstract: Bacteria in biofilms form complex structures and can collectively migrate within mobile aggregates, which is referred to as swarming. This behavior is influenced by a combination of various factors, including morphological characteristics and propulsive ... ...

    Abstract Bacteria in biofilms form complex structures and can collectively migrate within mobile aggregates, which is referred to as swarming. This behavior is influenced by a combination of various factors, including morphological characteristics and propulsive forces of swimmers, their volume fraction within a confined environment, and hydrodynamic and steric interactions between them. In our study, we employ the squirmer model for microswimmers and the dissipative particle dynamics method for fluid modeling to investigate the collective motion of swimmers in thin films. The film thickness permits a free orientation of non-spherical squirmers, but constraints them to form a two-layered structure at maximum. Structural and dynamic properties of squirmer suspensions confined within the slit are analyzed for different volume fractions of swimmers, motility types (
    Language English
    Publishing date 2024-04-19
    Publishing country England
    Document type Journal Article
    ZDB-ID 2191476-X
    ISSN 1744-6848 ; 1744-683X
    ISSN (online) 1744-6848
    ISSN 1744-683X
    DOI 10.1039/d4sm00075g
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: The effect of ultrasound on synthesis and energy storage mechanism of Ti3C2Tx MXene

    Wu Zhang / Xinyue Zhang

    Ultrasonics Sonochemistry, Vol 89, Iss , Pp 106122- (2022)

    2022  

    Abstract: Removal of aluminum (abbreviated to Al) accounts for the main step for synthesizing Ti3C2Tx MXene. To date, the synthesis of Ti3C2Tx MXene is hampered by the low removal efficiency of Al from Ti3AlC2. Ultrasound was therefore introduced to achieve ... ...

    Abstract Removal of aluminum (abbreviated to Al) accounts for the main step for synthesizing Ti3C2Tx MXene. To date, the synthesis of Ti3C2Tx MXene is hampered by the low removal efficiency of Al from Ti3AlC2. Ultrasound was therefore introduced to achieve efficient synthesis of Ti3C2Tx MXene by promoting the removal rate of Al from Ti3AlC2. It was found that ultrasonic aid can significantly boost the removal efficiency of Al. Additionally, distinct kinetics for the removal of Al was recognized as the advent of ultrasonic intervention: (i) the shrinking core model was used to describe the removal kinetics of Al in the case without ultrasound, whilst the shrinking particle model was capable for the case in presence of ultrasound; (ii) the activation energy for removal of Al with ultrasonic aid was 70.2 kJ/mol, indicating a chemical reaction-controlled process, whereas the corresponding value for the case without sonication was 28.1 kJ/mol, demonstrating a mixed kinetic feature of the removal process of Al. Morphological study showed that ultrasound can remove the surface-adhering reaction products and favors the formation of structures with flower-like morphology. The sample without sonication treatment exhibited typical capacitive behavior, whilst the contribution of diffusion-limited capacitance in addition to the capacitive behavior was readily observed for the sonication-treated sample. Surface chemistry study indicated the more prevalent oxidation of the sonication treated sample, which gave rise to a higher specific capacitance than those without sonication treatment.
    Keywords Ti3AlC2 ; Removal of Al ; Sonochemical synthesis ; Ti3C2Tx MXene ; Chemistry ; QD1-999 ; Acoustics. Sound ; QC221-246
    Subject code 660
    Language English
    Publishing date 2022-09-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
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  3. Article ; Online: Unexpected reduction in thermal conductivity observed in graphene/h-BN heterostructures.

    Wu, Zhang / Liu, Rumeng / Wei, Ning / Wang, Lifeng

    Physical chemistry chemical physics : PCCP

    2024  Volume 26, Issue 5, Page(s) 3823–3831

    Abstract: Heterostructures find wide-ranging applications in fields such as thermal management, thermoelectric energy conversion, and nanoelectronics. This study provides new insights into the thermal conductivity of parallel heterointerfaces by investigating a ... ...

    Abstract Heterostructures find wide-ranging applications in fields such as thermal management, thermoelectric energy conversion, and nanoelectronics. This study provides new insights into the thermal conductivity of parallel heterointerfaces by investigating a longitudinal heterostructure composed of graphene and hexagonal boron nitride (h-BN) using molecular dynamics simulations. Interestingly, it is observed that this unique heterostructure possesses a lower thermal conductivity compared to pure h-BN. The analysis reveals that phonon scattering is enhanced by stress at the interface of the heterostructure and the mass distribution through it. The heterostructure model introduced in this study presents new insights for controlling phonon transportation in nanoscale structures.
    Language English
    Publishing date 2024-01-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d3cp05407a
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  4. Article: The era of personalized treatments: Updates on immunotherapy within urothelial of bladder cancer.

    Wu, Zhang-Song / Wu, Song

    Current urology

    2022  Volume 16, Issue 3, Page(s) 117–120

    Abstract: Bladder cancer is a complex disease of the urinary system with high morbidity and mortality. Recently, the introduction of immunotherapies such as immune checkpoint inhibitors (eg, programmed cell death protein 1/programmed death-ligand 1) has proven to ... ...

    Abstract Bladder cancer is a complex disease of the urinary system with high morbidity and mortality. Recently, the introduction of immunotherapies such as immune checkpoint inhibitors (eg, programmed cell death protein 1/programmed death-ligand 1) has proven to be a reliable means of improving survival outcomes, including patients with limited response to conventional treatment. Nevertheless, difficult questions remain in clinical practice, such as how to select appropriate patients for personalized treatment, how to predict and assess therapeutic efficacy in advance, and how to enhance the therapeutic benefits of immunotherapy treatment. These issues require urgent attention. Herein, we describe recent clinical applications of immune checkpoint inhibitors in bladder cancer therapy, examine underlying mechanisms for treatment failure in a subset of patients, and discuss potential approaches to improve their therapeutic effects.
    Language English
    Publishing date 2022-08-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2253664-4
    ISSN 1661-7657 ; 1661-7649
    ISSN (online) 1661-7657
    ISSN 1661-7649
    DOI 10.1097/CU9.0000000000000133
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 6628: Show issues Location:
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  5. Article ; Online: Dyeing and UV Protective Properties of Chitosan-Modified Cotton Fabric Treated with Black Rice Extract

    Li, Ke / Li, Xiaowen / Li, Yawei / Wu, Zhang

    Journal of Natural Fibers. 2023 Apr. 24, v. 20, no. 1 p.2163448-

    2023  

    Abstract: Black rice is known as a health-promoting food for its abundant content of anthocyanins. The main objective of this paper is to get functional and eco-friendly materials dyed with black rice extract. In this research work, chitosan-modified cotton fabric ...

    Abstract Black rice is known as a health-promoting food for its abundant content of anthocyanins. The main objective of this paper is to get functional and eco-friendly materials dyed with black rice extract. In this research work, chitosan-modified cotton fabric was dyed with the black rice extract, and the fabric’s CIELab color characteristic values (L*, a*, b*, C*), color strength (K/S) value, and UPF value were investigated closely. The K/S value and UPF value of dyed samples depend on temperature, time, and pH. It is worth noting that the acid medium favored the dyeing to obtain a purple-red color and achieve a larger K/S value and UPF value. The results showed that chitosan-modified cotton fabric dyed with black rice extract had good UV resistance and color fastness.
    Keywords anthocyanins ; black rice ; color ; cotton fabric ; dyeing ; health promotion ; pH ; temperature ; Cotton fabrics ; chitosan ; black rice extract ; color strength ; anti-ultraviolet property
    Language English
    Dates of publication 2023-0424
    Publishing place Taylor & Francis
    Document type Article ; Online
    ZDB-ID 2182715-1
    ISSN 1544-046X ; 1544-0478
    ISSN (online) 1544-046X
    ISSN 1544-0478
    DOI 10.1080/15440478.2022.2163448
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 7564: Show issues

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  6. Article ; Online: Dynamic Responses of a Coupled Tunnel with Large Span and Small Clear Distance under Blasting Load of the Construction of Transverse Passage

    Wu Zhang / Guanglin Liang / Yu Liang / Zhongjie Zhang / Chuanyu Xiao

    Applied Sciences, Vol 13, Iss 8599, p

    2023  Volume 8599

    Abstract: In order to investigate the law of the dynamic responses of a coupled tunnel with a large span and a small clear distance induced by the blasting load applied on the excavation face of the new horizontal adit for vehicles, a dynamic 3D finite element ... ...

    Abstract In order to investigate the law of the dynamic responses of a coupled tunnel with a large span and a small clear distance induced by the blasting load applied on the excavation face of the new horizontal adit for vehicles, a dynamic 3D finite element model was established based on the blasting excavation project of Yonghe tunnel’s new transverse passage in Guangzhou, China. The laws of the induced vibration velocity and dynamic stress of the existing tunnel are systematically analyzed according to the numerical calculation results. The results show that the main affected area of the existing lining is the lower arch waist facing the blast, where both the maximum vibration velocity and the maximum tensile stress appear. The horizontally radial vibration velocity (along the axis of the transverse passage) is the main contributor in the resulting vibration velocity of the lining. The distributed law and varying trend of the dynamic stress of the lining are similar to the vibration velocity, and there appears to be a satisfied positive linear correlation between the two indexes. When the distance from the excavation face of the horizontal adit to the existing tunnel is 10 m, the blasting-load-induced maximal vibration velocity and dynamic tensile stress of the tunnel are only 2.96 cm/s and 0.20 MPa, respectively, which are far less than that stipulated by the related technical code. A negative power exponential relationship between the peak vibration velocity of the existing tunnel lining and the distance from the excavation face of the transverse passage to the tunnel was also found. According to this relationship, the induced vibration velocity will exceed the threshold stipulated by the standard, i.e., 8 cm/s, if the distance decreases to 5.9 m. To improve the safety redundancy of the construction, the threshold of the distance from the excavation face of the horizontal adit to the existing tunnel is suggested to be 10 m under the current construction scheme.
    Keywords tunnel engineering ; transverse passage ; blasting load ; numerical simulation ; vibration velocity of blasting ; Technology ; T ; Engineering (General). Civil engineering (General) ; TA1-2040 ; Biology (General) ; QH301-705.5 ; Physics ; QC1-999 ; Chemistry ; QD1-999
    Subject code 690
    Language English
    Publishing date 2023-07-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: DGMP

    Shao-Wu Zhang / Jing-Yu Xu / Tong Zhang

    Genomics, Proteomics & Bioinformatics, Vol 20, Iss 5, Pp 928-

    Identifying Cancer Driver Genes by Jointing DGCN and MLP from Multi-omics Genomic Data

    2022  Volume 938

    Abstract: Identification of cancer driver genes plays an important role in precision oncology research, which is helpful to understand cancer initiation and progression. However, most existing computational methods mainly used the protein–protein interaction (PPI) ...

    Abstract Identification of cancer driver genes plays an important role in precision oncology research, which is helpful to understand cancer initiation and progression. However, most existing computational methods mainly used the protein–protein interaction (PPI) networks, or treated the directed gene regulatory networks (GRNs) as the undirected gene–gene association networks to identify the cancer driver genes, which will lose the unique structure regulatory information in the directed GRNs, and then affect the outcome of the cancer driver gene identification. Here, based on the multi-omics pan-cancer data (i.e., gene expression, mutation, copy number variation, and DNA methylation), we propose a novel method (called DGMP) to identify cancer driver genes by jointing directed graph convolutional network (DGCN) and multilayer perceptron (MLP). DGMP learns the multi-omics features of genes as well as the topological structure features in GRN with the DGCN model and uses MLP to weigh more on gene features for mitigating the bias toward the graph topological features in the DGCN learning process. The results on three GRNs show that DGMP outperforms other existing state-of-the-art methods. The ablation experimental results on the DawnNet network indicate that introducing MLP into DGCN can offset the performance degradation of DGCN, and jointing MLP and DGCN can effectively improve the performance of identifying cancer driver genes. DGMP can identify not only the highly mutated cancer driver genes but also the driver genes harboring other kinds of alterations (e.g., differential expression and aberrant DNA methylation) or genes involved in GRNs with other cancer genes. The source code of DGMP can be freely downloaded from https://github.com/NWPU-903PR/DGMP.
    Keywords Driver gene ; Directed graph convolutional network ; Multilayer perceptron ; Gene regulatory network ; Multi-omics data ; Biology (General) ; QH301-705.5
    Subject code 612
    Language English
    Publishing date 2022-10-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Prediction of Drug-Drug Interaction Using an Attention-Based Graph Neural Network on Drug Molecular Graphs

    Yue-Hua Feng / Shao-Wu Zhang

    Molecules, Vol 27, Iss 3004, p

    2022  Volume 3004

    Abstract: The treatment of complex diseases by using multiple drugs has become popular. However, drug-drug interactions (DDI) may give rise to the risk of unanticipated adverse effects and even unknown toxicity. Therefore, for polypharmacy safety it is crucial to ... ...

    Abstract The treatment of complex diseases by using multiple drugs has become popular. However, drug-drug interactions (DDI) may give rise to the risk of unanticipated adverse effects and even unknown toxicity. Therefore, for polypharmacy safety it is crucial to identify DDIs and explore their underlying mechanisms. The detection of DDI in the wet lab is expensive and time-consuming, due to the need for experimental research over a large volume of drug combinations. Although many computational methods have been developed to predict DDIs, most of these are incapable of predicting potential DDIs between drugs within the DDI network and new drugs from outside the DDI network. In addition, they are not designed to explore the underlying mechanisms of DDIs and lack interpretative capacity. Thus, here we propose a novel method of GNN-DDI to predict potential DDIs by constructing a five-layer graph attention network to identify k -hops low-dimensional feature representations for each drug from its chemical molecular graph, concatenating all identified features of each drug pair, and inputting them into a MLP predictor to obtain the final DDI prediction score. The experimental results demonstrate that our GNN-DDI is suitable for each of two DDI predicting scenarios, namely the potential DDIs among known drugs in the DDI network and those between drugs within the DDI network and new drugs from outside DDI network. The case study indicates that our method can explore the specific drug substructures that lead to the potential DDIs, which helps to improve interpretability and discover the underlying interaction mechanisms of drug pairs.
    Keywords drug-drug interaction ; prediction ; feature representation ; molecular graph ; graph attention network ; Organic chemistry ; QD241-441
    Subject code 006
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
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  9. Article ; Online: Ultrasound-assisted fabrication of Ti3C2Tx MXene toward enhanced energy storage performance

    Xinyue Zhang / Wu Zhang / Haitao Zhao

    Ultrasonics Sonochemistry, Vol 86, Iss , Pp 106024- (2022)

    2022  

    Abstract: Ti3C2Tx MXenes are normally fabricated by removal of main group element from the corresponding transition metal carbides, and they have been actively studied due to their superior energy storage performance. However, the low efficiency in removal of main ...

    Abstract Ti3C2Tx MXenes are normally fabricated by removal of main group element from the corresponding transition metal carbides, and they have been actively studied due to their superior energy storage performance. However, the low efficiency in removal of main group element (named as chemical etching) has significantly limited the application of MXene or MXene-related materials. Herein, we demonstrated an ultrasound-assisted approach to synthesize Ti3C2Tx MXene material by using Ti3AlC2 as the precursor. The experimental results indicate that the efficiency of chemical etching of Ti3AlC2 was dramatically promoted by ultrasound. The etching time was greatly shortened to 8 h while typically 24 h is sufficient in dilute hydrofluoric acid. Particularly, the high etching efficiency was achieved by using 2% hydrofluoric acid under the aid of ultrasound, which is lower in concentration than those reported in the previous literature. The specific capacitance of the 8 h sonicated sample is 155F/g, which is much higher than that of the un-sonicated sample prepared under the same experimental conditions. Additionally, the specific capacitance retention of the prepared 8 h sonicated sample was 97.5% after 20,000 cycles of charging/discharging, exhibiting an outstanding energy storage stability compared with the materials reported in previous literatures. It was proposed that removal of AlF3 from the surface of the etched particles was significantly promoted and the hydrogen bonds between the terminations of two different adjacent layers were broken by the acoustic cavitation effect of ultrasound.
    Keywords Ti3C2Tx MXene ; Ultrasound ; Energy Storage performance ; Chemistry ; QD1-999 ; Acoustics. Sound ; QC221-246
    Subject code 500
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Effect of B. subtilis in simulated acid red soil on the corrosion behavior of X80 pipeline steel.

    Duan, Teng / Wu, Zhang-Xiang / Wang, Dan / Du, Cui-Wei / Li, Xiao-Gang / Shen, Qing

    Bioelectrochemistry (Amsterdam, Netherlands)

    2024  Volume 157, Page(s) 108640

    Abstract: The eastern section of China's West-east gas transmission project is laid in acidic red soil. NRB are widespread in soils and play an important role in metal corrosion. In this article, the corrosion failure behavior and mechanism of X80 pipeline steel ... ...

    Abstract The eastern section of China's West-east gas transmission project is laid in acidic red soil. NRB are widespread in soils and play an important role in metal corrosion. In this article, the corrosion failure behavior and mechanism of X80 pipeline steel under the action of NRB in simulated acidic soil were studied. It was found that the biofilm of B. subtilis had significant inhibitory on the overall corrosion of X80 steel. Electrochemical results prove that the corrosion rate of the sterile group after 14 days of immersion was about 4.5 times that of the bacterial group. However, the biofilm promotes the formation of local corrosion pits. Confocal laser scanning microscopy images indicate that that the corrosion pit depth of the bacterial group (46.1 μm) was three times that of the bacterial-free group (15.7 μm) after 14 days. The pH of the acidic environment was slightly improved by B. subtilis. XPS results proved that B. subtilis complicates the corrosion products of X80 steel through its nitrate reduction ability and metabolism.
    MeSH term(s) Steel ; Bacillus subtilis ; Corrosion ; Soil ; Biofilms ; Rhodamines
    Chemical Substances Steel (12597-69-2) ; lissamine rhodamine B (2609-88-3) ; Soil ; Rhodamines
    Language English
    Publishing date 2024-01-09
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 2010650-6
    ISSN 1878-562X ; 0302-4598 ; 1567-5394
    ISSN (online) 1878-562X
    ISSN 0302-4598 ; 1567-5394
    DOI 10.1016/j.bioelechem.2024.108640
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    In stock of ZB MED Cologne/Königswinter

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