LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 249

Search options

  1. Article ; Online: A software and hardware design scheme of intelligent valve positioner

    Xu Haiming / Zhang Lanzhu

    E3S Web of Conferences, Vol 268, p

    2021  Volume 01067

    Abstract: Valve positioner is the core component of the pneumatic control valve. A new software and hardware design scheme of intelligent valve positioner is presented in this paper. The circuit composition of each part of the intelligent valve positioner is ... ...

    Abstract Valve positioner is the core component of the pneumatic control valve. A new software and hardware design scheme of intelligent valve positioner is presented in this paper. The circuit composition of each part of the intelligent valve positioner is introduced in hardware part. Based on it, a hardware solution to realize HART ‘multi-point’ communication is proposed in this research. In the software design, a novel combined PID control algorithm is proposed to solve the nonlinear problem caused by the friction between the valve stem and the packing during the control process. Simulation results show that the method proposed in this paper is better than traditional PID method and fuzzy PID method. The software and hardware design scheme of the valve positioner proposed in this paper has certain guiding significance for the development of related products.
    Keywords valve positioner ; pneumatic control valve ; combined pid ; hart ; nonlinear control ; Environmental sciences ; GE1-350
    Subject code 621
    Language English
    Publishing date 2021-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  2. Article ; Online: Combined application of multiple biomarkers for early auxiliary diagnosis of silicosis.

    Liu, Keliang / Sun, Linqing / Li, Sirui / Xu, Haiming

    Toxicology and industrial health

    2023  Volume 39, Issue 3, Page(s) 138–145

    Abstract: Silicosis is an important industrial health problem for those workers exposed to silica. The present study aimed to investigate the sensitivity and specificity of combined detection of biomarkers in early auxiliary diagnosis of silicosis, the risk ... ...

    Abstract Silicosis is an important industrial health problem for those workers exposed to silica. The present study aimed to investigate the sensitivity and specificity of combined detection of biomarkers in early auxiliary diagnosis of silicosis, the risk factors of silicosis were also studied. The study sample comprised 65 workers who had clinical silicosis and 70 matched control subjects who were exposed to silica but did not have clinical silicosis. The levels of superoxide dismutase, malondialdehyde, interleukin 6 (IL-6), tumor necrosis factor-alpha, and cholinesterases in the serum of 135 subjects were measured. After completing the biochemical assays, a logistic regression model based on the above biochemical determination results was established, and the receiver operating characteristic curve was used for judging the discrimination ability of different statistical indexes. The expression levels of MDA, IL-6, and TNF-alpha in serum samples of patients with stage I silicosis and MDA and IL-6 in serum samples of patients with stage II silicosis were all significantly higher. Results from logistic regression analysis showed that ChEs were protective factors for silicosis, while age, chronic respiratory symptoms, IL-6, and MDA were risk factors. The areas under the ROC curve (AUC) were 0.86 (IL-6), 0.81 (MDA), and 0.65 (TNF-alpha or ChEs). AUC-ROC = 0.90 (95%CI:0.84-0.95). The diagnostic efficiency of IL-6 combined with MDA and TNF-alpha was better than that of any single biomarker.
    MeSH term(s) Humans ; Tumor Necrosis Factor-alpha/metabolism ; Interleukin-6 ; Silicosis/diagnosis ; Silicon Dioxide ; Biomarkers
    Chemical Substances Tumor Necrosis Factor-alpha ; Interleukin-6 ; 2-(N-cyclohexylamino)ethanesulfonic acid (103-47-9) ; Silicon Dioxide (7631-86-9) ; Biomarkers
    Language English
    Publishing date 2023-02-03
    Publishing country England
    Document type Journal Article
    ZDB-ID 56831-4
    ISSN 1477-0393 ; 0748-2337
    ISSN (online) 1477-0393
    ISSN 0748-2337
    DOI 10.1177/07482337231154636
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Evaluation and future projections of wind energy resources over the Northern Hemisphere in CMIP5 and CMIP6 models

    Miao, Haozeyu / Xu, Haiming / Huang, Gang / Yang, Kai

    Renewable Energy. 2023 July, v. 211 p.809-821

    2023  

    Abstract: Understanding how the wind energy resources will change in a future climate under different greenhouse gas (GHG) emission scenarios is critical for global energy safety and economy. In this study, we evaluate the simulated wind speed over the Northern ... ...

    Abstract Understanding how the wind energy resources will change in a future climate under different greenhouse gas (GHG) emission scenarios is critical for global energy safety and economy. In this study, we evaluate the simulated wind speed over the Northern Hemisphere in global climate models that participate in the Coupled Model Intercomparison Project Phase 5 (CMIP5) and Phase 6 (CMIP6) using observation, and further show the future change of wind speed and wind energy in the Northern Hemisphere under four different GHG emission scenarios using superior models. We find that the CMIP6 models are generally better in simulating surface wind speeds over the Northern Hemisphere than CMIP5 models, in terms of spatial pattern and long-term trend. For future projection of wind speed at the end of the 21st century, models generally show a continued decreasing trend, except in SSP3-7.0 scenario. The change in wind energy and emissions are non-linearly related in different regions, as wind speed exhibits the fastest drop over Europe and Asia while shows the flattest trend over North America under SSP3-7.0. Our results suggest that higher emission scenario will undermine the magnitude of the wind energy resources and more importantly, reshape its spatial distribution over the Northern Hemisphere.
    Keywords climate ; energy ; greenhouse gas emissions ; greenhouse gases ; models ; wind power ; wind speed ; Asia ; Europe ; North America ; Wind energy resource ; Greenhouse warming ; The Northern Hemisphere ; Climate model
    Language English
    Dates of publication 2023-07
    Size p. 809-821.
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 2001449-1
    ISSN 1879-0682 ; 0960-1481
    ISSN (online) 1879-0682
    ISSN 0960-1481
    DOI 10.1016/j.renene.2023.05.007
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  4. Article ; Online: Comparative and functional analysis unveils the contribution of photoperiod to DNA methylation, sRNA accumulation, and gene expression variations in short-day and long-day grasses.

    Wu, Xia / Chen, Siyi / Lin, Feng / Muhammad, Fahad / Xu, Haiming / Wu, Liang

    The Plant journal : for cell and molecular biology

    2024  

    Abstract: Photoperiod employs complicated networks to regulate various developmental processes in plants, including flowering transition. However, the specific mechanisms by which photoperiod affects epigenetic modifications and gene expression variations in ... ...

    Abstract Photoperiod employs complicated networks to regulate various developmental processes in plants, including flowering transition. However, the specific mechanisms by which photoperiod affects epigenetic modifications and gene expression variations in plants remain elusive. In this study, we conducted a comprehensive analysis of DNA methylation, small RNA (sRNA) accumulation, and gene expressions under different daylengths in facultative long-day (LD) grass Brachypodium distachyon and short-day (SD) grass rice. Our results showed that while overall DNA methylation levels were minimally affected by different photoperiods, CHH methylation levels were repressed under their favorable light conditions, particularly in rice. We identified numerous differentially methylated regions (DMRs) that were influenced by photoperiod in both plant species. Apart from differential sRNA clusters, we observed alterations in the expression of key components of the RNA-directed DNA methylation pathway, DNA methyltransferases, and demethylases, which may contribute to the identified photoperiod-influenced CHH DMRs. Furthermore, we identified many differentially expressed genes in response to different daylengths, some of which were associated with the DMRs. Notably, we discovered a photoperiod-responsive gene MYB11 in the transcriptome of B. distachyon, and further demonstrated its role as a flowering inhibitor by repressing FT1 transcription. Together, our comparative and functional analysis sheds light on the effects of daylength on DNA methylation, sRNA accumulation, and gene expression variations in LD and SD plants, thereby facilitating better designing breeding programs aimed at developing high-yield crops that can adapt to local growing seasons.
    Language English
    Publishing date 2024-03-16
    Publishing country England
    Document type Journal Article
    ZDB-ID 1088037-9
    ISSN 1365-313X ; 0960-7412
    ISSN (online) 1365-313X
    ISSN 0960-7412
    DOI 10.1111/tpj.16721
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article ; Online: Unique regulatory roles of ncRNAs changed by PM

    He, Bo / Xu, Hai-Ming / Liu, Hao-Wen / Zhang, Yin-Feng

    Ecotoxicology and environmental safety

    2023  Volume 255, Page(s) 114812

    Abstract: ... ...

    Abstract PM
    MeSH term(s) Humans ; RNA, Long Noncoding/genetics ; RNA, Long Noncoding/metabolism ; RNA, Circular/genetics ; MicroRNAs/genetics ; MicroRNAs/metabolism ; Inflammation ; Biomarkers ; Particulate Matter/toxicity
    Chemical Substances RNA, Long Noncoding ; RNA, Circular ; MicroRNAs ; Biomarkers ; Particulate Matter
    Language English
    Publishing date 2023-03-22
    Publishing country Netherlands
    Document type Meta-Analysis ; Journal Article ; Review
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2023.114812
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article: Eye-Tracking in Interpreting Studies: A Review of Four Decades of Empirical Studies.

    Hu, Ting / Wang, Xinyu / Xu, Haiming

    Frontiers in psychology

    2022  Volume 13, Page(s) 872247

    Abstract: It has been four decades since eye-tracking was first used in interpreting studies, and recent years has witnessed a growing interest in the application of this method, which holds great potential for offering a look into the "black box" of interpreting ... ...

    Abstract It has been four decades since eye-tracking was first used in interpreting studies, and recent years has witnessed a growing interest in the application of this method, which holds great potential for offering a look into the "black box" of interpreting processing. However, little attention has been paid to comprehensively illustrating what has been done, what can be done, and what needs to be done with this method in this discipline. With this in view, this paper sets out to understand contributions of previous studies-key themes discussed, eye-tracking measures used, their limitations and implications, and future directions. To this end, we conduct a review of a total of 26 empirical papers from peer-reviewed journals within a time span of 4 decades ranging from 1981 to 2021. This study, as the first attempt of its kind at a comprehensive review on using eye-tracking in interpreting studies, should have implications for researchers, educators, and practitioners.
    Language English
    Publishing date 2022-06-27
    Publishing country Switzerland
    Document type Journal Article ; Review
    ZDB-ID 2563826-9
    ISSN 1664-1078
    ISSN 1664-1078
    DOI 10.3389/fpsyg.2022.872247
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Retraction notice to "LncRNA MALAT1 knockdown alleviates oxygen-glucose deprivation and reperfusion induced cardiomyocyte apoptotic death by regulating miR-122" [Experimental and Molecular Pathology 111 (2019) 104325].

    Gong, Licheng / Chang, Hong / Xu, Haiming

    Experimental and molecular pathology

    2022  Volume 126, Page(s) 104778

    Language English
    Publishing date 2022-05-23
    Publishing country Netherlands
    Document type Journal Article ; Retraction of Publication
    ZDB-ID 207655-x
    ISSN 1096-0945 ; 0014-4800
    ISSN (online) 1096-0945
    ISSN 0014-4800
    DOI 10.1016/j.yexmp.2022.104778
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Why is the mid-tropospheric North Atlantic subtropical high much stronger than the North Pacific subtropical high in boreal summer?

    Chen, Hongli / Xu, Haiming / Ma, Jing / Deng, Jiechun

    Climate dynamics. 2022 Sept., v. 59, no. 5-6

    2022  

    Abstract: Evidence clearly shows that the mid-tropospheric North Atlantic subtropical high (NASH) is much stronger than the North Pacific subtropical high (NPSH) in summer, but the mechanism is unknown. To understand the mechanism for such zonal difference between ...

    Abstract Evidence clearly shows that the mid-tropospheric North Atlantic subtropical high (NASH) is much stronger than the North Pacific subtropical high (NPSH) in summer, but the mechanism is unknown. To understand the mechanism for such zonal difference between the two systems, we perform a series of sensitivity simulations using a community atmosphere model (CAM) and a linear baroclinic model (LBM). The CAM results indicate that the zonal variation of tropical sea-surface temperatures (SSTs), followed by Tibetan Plateau (TP), play leading roles in the formation of these mid-level subtropical high differences through modulating precipitation-related heating sources. The impacts of such heat sources are then investigated using the LBM. The tropical SST variation-related convective heating over the northeastern equatorial Pacific acts to enhance the NASH via exciting an eastward-propagating wave pattern resembling the Pacific-North American teleconnection; the TP-induced large-scale latent heating can also cause the NASH-NPSH difference by exciting a circumglobal teleconnection (CGT)-like wave pattern with westward-propagating part and eastward-propagating part along the westerly jet stream. Thus, their combined effect makes the NASH much stronger than the NPSH in the mid troposphere during summertime.
    Keywords climate ; dynamics ; heat ; models ; summer ; troposphere ; China
    Language English
    Dates of publication 2022-09
    Size p. 1883-1895.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1471747-5
    ISSN 1432-0894 ; 0930-7575
    ISSN (online) 1432-0894
    ISSN 0930-7575
    DOI 10.1007/s00382-021-06074-3
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article ; Online: Environmentally relevant concentrations of benzophenones exposure disrupt intestinal homeostasis, impair the intestinal barrier, and induce inflammation in mice.

    Lin, Yu-Jia / Li, Hong-Mei / Gao, Yan-Rong / Wu, Ping-Fan / Cheng, Bin / Yu, Chen-Long / Sheng, Yu-Xin / Xu, Hai-Ming

    Environmental pollution (Barking, Essex : 1987)

    2024  Volume 350, Page(s) 123948

    Abstract: The aim of this study is to investigate the adverse effects of benzophenones (BPs) on the intestinal tract of mice and the potential mechanism. F1-generation ICR mice were exposed to BPs (benzophenone-1, benzophenone-2, and benzophenone-3) by ... ...

    Abstract The aim of this study is to investigate the adverse effects of benzophenones (BPs) on the intestinal tract of mice and the potential mechanism. F1-generation ICR mice were exposed to BPs (benzophenone-1, benzophenone-2, and benzophenone-3) by breastfeeding from birth until weaning, and by drinking water after weaning until maturity. The offspring mice were executed on postnatal day 56, then their distal colons were sampled. AB-PAS staining, HE staining, immunofluorescence, Transmission Electron Microscope, immunohistochemistry, Western Blot and RT-qPCR were used to study the effects of BPs exposure on the colonic tissues of offspring mice. The results showed that colonic microvilli appeared significantly deficient in the high-dose group, and the expression of tight junction markers Zo-1 and Occludin was significantly down-regulated and the number of goblet cells and secretions were reduced in all dose groups, and the expression of secretory cell markers MUC2 and KI67 were decreased, as well as the expression of intestinal stem cell markers Lgr5 and Bmi1, suggesting that BPs exposure caused disruption of intestinal barrier and imbalance in the composition of the intestinal stem cell pool. Besides, the expression of cellular inflammatory factors such as macrophage marker F4/80 and tumor necrosis factor TNF-α was elevated in the colonic tissues of all dose groups, and the inflammatory infiltration was observed, which means the exposure of BPs caused inflammatory effects in the intestinal tract of F1-generation mice. In addition, the contents of Notch/Wnt signaling pathway-related genes, such as Dll-4, Notch1, Hes1, Ctnnb1and Sfrp2 were significantly decreased in each high-dose group (P < 0.05), suggesting that BPs may inhibit the regulation of Notch/Wnt signaling pathway. In conclusion, exposure to BPs was able to imbalance colonic homeostasis, disrupt the intestinal barrier, and trigger inflammation in the offspring mice, which might be realized through interfering with the Notch/Wnt signaling pathway.
    Language English
    Publishing date 2024-04-11
    Publishing country England
    Document type Journal Article
    ZDB-ID 280652-6
    ISSN 1873-6424 ; 0013-9327 ; 0269-7491
    ISSN (online) 1873-6424
    ISSN 0013-9327 ; 0269-7491
    DOI 10.1016/j.envpol.2024.123948
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: Identification of key miRNAs and mRNAs related to coronary artery disease by meta-analysis.

    Liu, Long / Zhang, Jingze / Wu, Mei / Xu, Haiming

    BMC cardiovascular disorders

    2021  Volume 21, Issue 1, Page(s) 443

    Abstract: Background: To illustrate the mechanism of miRNA and mRNA in coronary artery diseasen (CAD), differentially expressed microRNAs (DEmiRNAs) and genes (DEGs) were analyzed.: Methods: The mRNA transcription profiles of GSE20680 (including 87 blood ... ...

    Abstract Background: To illustrate the mechanism of miRNA and mRNA in coronary artery diseasen (CAD), differentially expressed microRNAs (DEmiRNAs) and genes (DEGs) were analyzed.
    Methods: The mRNA transcription profiles of GSE20680 (including 87 blood samples of CAD and 52 blood samples of control), GSE20681 (including 99 blood samples of CAD and 99 blood samples of control) and GSE12288 (including 110 blood samples of CAD and 112 blood samples of control) and the miRNA transcription profiles of GSE59421 (including 33 blood samples of CAD and 37 blood samples of control), GSE49823 (including 12 blood samples of CAD and 12 blood samples of control) and GSE28858 (including 13 blood samples of CAD and 13 blood samples of control) were downloaded from Gene Expression Omnibus (GEO; http://www.ncbi.nlm.nih.gov/geo/ ). Then, the homogenous expressed mRNAs and miRNAs across the three mRNA transcription profiles and three miRNA transcription profiles were screened using the Fishers exact test in MetaDE. ES package. The weighted gene co-expression network analysis (WGCNA) was used to analyze gene modules. Additionally, the integrated miRNAs-targets regulatory network using the DEmiRNA and their targets was constructed using Cytoscape.
    Results: A total of 1201 homogenously statistically significant DEGs were identified including 879 up-regulated and 322 down-regulated DEGs, while a total of 47 homogenously statistically significant DEmiRNAs including 37 up-regulated and 10 down-regulated DEmiRNAs in CAD compared with the controls across the three mRNA transcription profiles and the three miRNA transcription profiles. A total of 5067 genes were clustered into 9 modules in the training dataset, among which, 8 modules were validated. In the miRNAs-targets network, there existed 267 interaction relationships among 5 miRNAs (hsa-miR-361-5p, hsa-miR-139-5p, hsa-miR-146b-5p, hsa-miR-502-5p and hsa-miR-501-5p) and 213 targets. CAV1 could be the target of hsa-miR-361-5 while HSF2 was the target of both hsa-miR-361-5p and hsa-miR-146b-5p. CAV1 was significantly enriched in the GO term of regulation of cell proliferation.
    Conclusion: hsa-miR-361-5p, has-miR-146b-5p, CAV1 and HSF2 could play an important role in CAD.
    MeSH term(s) Adult ; Aged ; Case-Control Studies ; Caveolin 1/genetics ; Caveolin 1/metabolism ; Coronary Artery Disease/diagnostic imaging ; Coronary Artery Disease/genetics ; Databases, Genetic ; Female ; Gene Expression Profiling ; Gene Regulatory Networks ; Genetic Association Studies ; Heat-Shock Proteins/genetics ; Heat-Shock Proteins/metabolism ; Humans ; Male ; MicroRNAs/genetics ; Middle Aged ; Oligonucleotide Array Sequence Analysis ; RNA, Messenger/genetics ; Transcription Factors/genetics ; Transcription Factors/metabolism ; Transcriptome
    Chemical Substances CAV1 protein, human ; Caveolin 1 ; Heat-Shock Proteins ; MIRN146 microRNA, human ; MIRN361 microRNA, human ; MicroRNAs ; RNA, Messenger ; Transcription Factors ; HSF2 protein, human (142297-91-4)
    Language English
    Publishing date 2021-09-16
    Publishing country England
    Document type Journal Article ; Meta-Analysis
    ZDB-ID 2059859-2
    ISSN 1471-2261 ; 1471-2261
    ISSN (online) 1471-2261
    ISSN 1471-2261
    DOI 10.1186/s12872-021-02211-2
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top