LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 142

Search options

  1. Article: [The current research status and thinking on the history of stomatology in modern China].

    Yuan, Z Y

    Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology

    2022  Volume 57, Issue 8, Page(s) 861–866

    Abstract: The research on the history of stomatology in modern China began in the middle of 20th century. The history of stomatology is a branch of medical history and stomatology education research. Most of researches on it were general historical researches, but ...

    Abstract The research on the history of stomatology in modern China began in the middle of 20th century. The history of stomatology is a branch of medical history and stomatology education research. Most of researches on it were general historical researches, but problems on its medical knowledge dissemination and system, development process and social relations, etc. had not been drawn wider attentions at the moment. In order to innovate the research methods of stomatology history, and to promote the study of stomatology history from the perspective of empirical and cultural mutual corroboration, this article classifies and summarizes the research status, characteristics and trends of the stomatology history in modern China.
    MeSH term(s) China ; History, 20th Century ; Oral Medicine/history ; Research Design
    Language Chinese
    Publishing date 2022-08-15
    Publishing country China
    Document type Historical Article ; Journal Article
    ZDB-ID 1027950-7
    ISSN 1002-0098
    ISSN 1002-0098
    DOI 10.3760/cma.j.cn112144-20220613-00322
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Development of explicit formulations of G45-based gas kinetic scheme for simulation of continuum and rarefied flows.

    Liu, Z J / Shu, C / Chen, S Y / Liu, W / Yuan, Z Y / Yang, L M

    Physical review. E

    2022  Volume 105, Issue 4-2, Page(s) 45302

    Abstract: In this work, the explicit formulations of the Grad's distribution function for the 45 moments (G45)-based gas kinetic scheme (GKS) are presented. Similar to the G13 function-based gas kinetic scheme (G13-GKS), G45-GKS simulates flows from the continuum ... ...

    Abstract In this work, the explicit formulations of the Grad's distribution function for the 45 moments (G45)-based gas kinetic scheme (GKS) are presented. Similar to the G13 function-based gas kinetic scheme (G13-GKS), G45-GKS simulates flows from the continuum regime to the rarefied regime by solving the macroscopic governing equations based on the conservation laws, which are widely used in conventional Navier-Stokes solver. These macroscopic governing equations are discretized by the finite volume method, where the numerical fluxes are evaluated by the local solution to the Boltzmann equation. The initial distribution function is reconstructed by the G45 distribution function, which is a higher order truncation of the Hermite expansion of distribution function compared with the G13 distribution function. Such high order truncation of Hermite expansion helps the present solver to achieve a better accuracy than G13-GKS. Moreover, the reconstruction of distribution function makes the development of explicit formulations of numerical fluxes feasible, and the evolution of the distribution function, which is the main reason why the discrete velocity method is expensive, is avoided. Several numerical experiments are performed to examine the accuracy of G45-GKS. Results show that the accuracy of the present solver for almost all flow problems is much better than G13-GKS. Moreover, some typical rarefied effects, such as the direction of heat flux without temperature gradients and thermal creep flow, can be well captured by the present solver.
    Language English
    Publishing date 2022-04-18
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.105.045302
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article: [The advances of brain structure and functional imaging of migraine].

    Wang, W / Zhang, X Y / Yuan, Z Y / Mei, Y L / Zhang, P / Sui, B B / Wang, Y G

    Zhonghua nei ke za zhi

    2023  Volume 62, Issue 10, Page(s) 1234–1238

    Language Chinese
    Publishing date 2023-09-26
    Publishing country China
    Document type Journal Article
    ZDB-ID 754223-9
    ISSN 0578-1426
    ISSN 0578-1426
    DOI 10.3760/cma.j.cn112138-20220922-00706
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article: [Research progress of the relationship between liver regeneration and tumor recurrence after hepatectomy].

    Yang, L / Yuan, Z Y / Zhang, Y M

    Zhonghua wai ke za zhi [Chinese journal of surgery

    2019  Volume 57, Issue 7, Page(s) 554–557

    Abstract: Partial hepatectomy is still the preferred modality of treatment for hepatocellular carcinoma.In recent years, a substantial number of ... ...

    Abstract Partial hepatectomy is still the preferred modality of treatment for hepatocellular carcinoma.In recent years, a substantial number of in
    MeSH term(s) Adult ; Carcinoma, Hepatocellular/physiopathology ; Carcinoma, Hepatocellular/surgery ; Hepatectomy/adverse effects ; Humans ; Liver Neoplasms/physiopathology ; Liver Neoplasms/surgery ; Liver Regeneration/physiology ; Neoplasm Recurrence, Local/physiopathology
    Language Chinese
    Publishing date 2019-07-03
    Publishing country China
    Document type Journal Article
    ZDB-ID 604573-x
    ISSN 0529-5815
    ISSN 0529-5815
    DOI 10.3760/cma.j.issn.0529-5815.2019.07.015
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Precipitation-mediated responses of plant biomass production and allocation to changing soil pH in semiarid grasslands

    Liu, Kai / Liu, Zunchi / Li, Xiang / Shi, X.R. / Lock, T. Ryan / Kallenbach, Robert L. / Yuan, Z.Y.

    Agriculture, ecosystems & environment. 2022 Nov. 01, v. 339

    2022  

    Abstract: Biomass and its allocation are crucial to understand carbon cycling. Climate change and human disturbance potentially alter soil pH, but it remains unclear how biomass production and its partitioning respond to altered soil pH. Here, we investigated how ... ...

    Abstract Biomass and its allocation are crucial to understand carbon cycling. Climate change and human disturbance potentially alter soil pH, but it remains unclear how biomass production and its partitioning respond to altered soil pH. Here, we investigated how changing soil pH (acidification and alkalization) affected above- and belowground biomass production and allocation (hereafter AB, BB and BB/AB, respectively) at nine sites representing desert, typical, and meadow grasslands with increasing precipitation across a 1500-km transect in Inner Mongolia, China. The results showed that soil acidification reduced AB in typical and meadow grasslands, whereas soil alkalization reduced AB in desert and typical grasslands. Changing soil pH did not affect BB in desert or typical grasslands, but reduced BB in meadow grasslands. Altered soil pH negatively impacted species richness, Shannon-Wiener diversity, and dominant species biomass across all grasslands. BB/AB was increased by soil acidification and alkalization along the study transect. Soil C, N and C:N ratio were not affected by changing soil pH in three types of grasslands. Response ratios of AB, BB/AB and dominant species biomass were positively correlated with precipitation under altered soil pH, whereas response ratios of BB were negatively correlated with precipitation under soil alkalization. Variance partitioning analysis showed that the response of biomass and its allocation to altered soil pH were mainly explained by community composition but not soil fertility. Structural equation model analysis demonstrated that precipitation mediated the responses of biomass distribution to soil pH changes in semi-arid grasslands mainly via altering the response of dominant species. Our results indicate that dry grasslands with low productivity and precipitation generally allocate more C to belowground than wet grasslands regardless of pH change. These findings can improve our predictions of carbon dynamics in grassland ecosystems under climate change.
    Keywords acidification ; agriculture ; alkalinization ; anthropogenic activities ; belowground biomass ; biomass production ; carbon ; carbon nitrogen ratio ; climate change ; community structure ; dominant species ; environment ; meadows ; phytomass ; soil acidification ; soil fertility ; soil pH ; species richness ; structural equation modeling ; variance ; China
    Language English
    Dates of publication 2022-1101
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 602345-9
    ISSN 1873-2305 ; 0167-8809
    ISSN (online) 1873-2305
    ISSN 0167-8809
    DOI 10.1016/j.agee.2022.108123
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  6. Article: [Correlation of interleukin-4 gene methylation regulation with the pathogenesis of recurrent aphthous ulcer].

    Yuan, Z Y / Nan, X R / Li, M / Guan, C Q

    Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology

    2020  Volume 55, Issue 8, Page(s) 565–570

    Abstract: Objetive: ...

    Abstract Objetive:
    MeSH term(s) Adolescent ; Adult ; DNA Methylation ; Female ; Humans ; Interleukin-4/genetics ; Male ; Promoter Regions, Genetic ; RNA, Messenger ; Stomatitis, Aphthous/genetics ; Young Adult
    Chemical Substances RNA, Messenger ; Interleukin-4 (207137-56-2)
    Language Chinese
    Publishing date 2020-08-12
    Publishing country China
    Document type Journal Article
    ZDB-ID 1027950-7
    ISSN 1002-0098
    ISSN 1002-0098
    DOI 10.3760/cma.j.cn112144-20191203-00435
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article: [Clinical features and significance of cirrhosis-associated immune dysfunction].

    Yuan, Z Y / Guo, J S

    Zhonghua gan zang bing za zhi = Zhonghua ganzangbing zazhi = Chinese journal of hepatology

    2016  Volume 24, Issue 10, Page(s) 724–727

    Abstract: Cirrhosis-associated immune dysfunction (CAID) refers to immunodeficiency and systemic inflammation in cirrhotic patients and is the characteristic pathophysiological change of liver cirrhosis of various causes. The phenotype of CAID changes dynamically ... ...

    Abstract Cirrhosis-associated immune dysfunction (CAID) refers to immunodeficiency and systemic inflammation in cirrhotic patients and is the characteristic pathophysiological change of liver cirrhosis of various causes. The phenotype of CAID changes dynamically with the progression of liver cirrhosis. In patients with stable cirrhotic ascites, CAID is manifested as "pro-inflammatory" state, and in patients with severe decompensated liver cirrhosis complicated by extrahepatic organ failure, it is manifested as "immunodeficiency". CAID affects the clinical manifestations and prognosis of liver cirrhosis, aggravates the condition of cirrhotic patients, and increases the risk of infection. This article briefly introduces the mechanism, features, and clinical significance of CAID.
    MeSH term(s) Disease Progression ; Female ; Humans ; Immune System/physiopathology ; Immune System Diseases ; Inflammation/physiopathology ; Liver Cirrhosis/blood ; Liver Cirrhosis/immunology ; Liver Cirrhosis/physiopathology ; Male ; Middle Aged ; Prognosis
    Language Chinese
    Publishing date 2016-10-20
    Publishing country China
    Document type Journal Article
    ISSN 1007-3418
    ISSN 1007-3418
    DOI 10.3760/cma.j.issn.1007-3418.2016.10.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: Variant of gas kinetic flux solver for flows beyond Navier-Stokes level.

    Yuan, Z Y / Shu, C / Liu, Z J / Yang, L M / Liu, W

    Physical review. E

    2021  Volume 104, Issue 5-2, Page(s) 55305

    Abstract: In this paper, a variant of gas kinetic flux solver (GKFS) is presented for simulation of flows beyond the Navier-Stokes (NS) level. The method retains the framework of GKFS and reconstructs the numerical fluxes by the moments of distribution function at ...

    Abstract In this paper, a variant of gas kinetic flux solver (GKFS) is presented for simulation of flows beyond the Navier-Stokes (NS) level. The method retains the framework of GKFS and reconstructs the numerical fluxes by the moments of distribution function at the cell interface, which is given from the local solution of the Boltzmann equation. In the conventional GKFS, the first-order Chapman-Enskog (CE) expansion is utilized to approximate the initial distribution function. By using the differential chain rule, it was found that the CE expansion form could be linked to the stress tensor and the heat flux. For flows in the NS level, the stress tensor and heat flux can be simply calculated from the linearized constitutive relationship and Fourier's law, respectively. However, for flows beyond the NS level, due to the strong nonequilibrium effect, the linearized constitutive relationship and Fourier's law are insufficient to predict the stress tensor and the heat flux. To overcome this difficulty, this paper introduces correction terms to the stress tensor and heat flux in the initial distribution function. These correction terms will take effect in the strong nonequilibrium region for flows beyond the NS level. To avoid finding complex expressions or solving complicated partial differential equations for the correction terms, a simple and iterative procedure is proposed to update the correction terms based on the framework of GKFS. The proposed method is validated by three benchmark cases which cover the flow from the continuum regime to the transition regime. Numerical results show that the present solver can provide accurate solution in the continuum regime. It is indeed the correction terms that take effect in the strong nonequilibrium region for flows beyond the NS level, which enables the present solver to capture the nonequilibrium phenomenon with reasonable accuracy for rarefied flows at moderate Knudsen number.
    Language English
    Publishing date 2021-12-27
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2844562-4
    ISSN 2470-0053 ; 2470-0045
    ISSN (online) 2470-0053
    ISSN 2470-0045
    DOI 10.1103/PhysRevE.104.055305
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article: [Similarities and differences of myocardial metabolic characteristics between HFpEF and HFrEF mice based on LC-MS/MS metabolomics].

    Zhang, Z Y / Feng, X Y / Wang, Z H / Huang, Y Z / Yang, W B / Zhang, W J / Zhou, J / Yuan, Z Y

    Zhonghua xin xue guan bing za zhi

    2022  Volume 51, Issue 7, Page(s) 722–730

    Abstract: Objective: ...

    Abstract Objective:
    MeSH term(s) Mice ; Animals ; Heart Failure/metabolism ; Stroke Volume ; Chromatography, Liquid ; Tandem Mass Spectrometry ; Metabolomics ; Arachidonic Acids ; Proline
    Chemical Substances Arachidonic Acids ; Proline (9DLQ4CIU6V)
    Language Chinese
    Publishing date 2022-11-08
    Publishing country China
    Document type English Abstract ; Journal Article
    ZDB-ID 603425-1
    ISSN 0253-3758
    ISSN 0253-3758
    DOI 10.3760/cma.j.cn112148-20230329-00182
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: A comprehensive review on water stable metal-organic frameworks for large-scale preparation and applications in water quality management based on surveys made since 2015

    Li, R. Y. / Wang, Z. S. / Yuan, Z. Y. / Van Horne, Constance / Freger, Viatcheslav / Lin, M. / Cai, R. K. / Chen, J. P.

    Critical reviews in environmental science and technology. 2022 Aug. 26, v. 52, no. 22

    2022  

    Abstract: Water is one of essential resources of modern society. Employing cost-effective technologies to treat water and wastewater is of vital importance for household uses, industries and the environment. Water-stable metal-organic frameworks (MOFs) have ... ...

    Abstract Water is one of essential resources of modern society. Employing cost-effective technologies to treat water and wastewater is of vital importance for household uses, industries and the environment. Water-stable metal-organic frameworks (MOFs) have emerged as promising innovative materials for water treatment, due to their versatility and properties such as large internal surface area, designable pore sizes, and chemical functionalities. In highly porous MOFs, metal center(s)/cluster(s) and organic ligands are linked with coordination bonds. This review paper presents the most recent developments in the industrial-scale synthesis of MOFs and applications in water purification. MOFs can be fabricated by several approaches; the microwave assisted continuous flow synthesis technologies can lead to higher production yields. The fabricated MOFs are then purified by the organic solvent and/or the solid separation, and activated by a few technologies (e.g., supercritical). Process safety in production, reactors design, and process optimization are important in production. The shaping techniques for MOFs on supporting materials via surface grafting/coating or embedment can be used to fabricate the MOFs-based materials with the better stability suitable for industrial applications. MOFs demonstrate much better performances than the commercially available materials in adsorption, filtration, sensing, and catalysis. Toxicity from MOFs is mainly due to the chemicals involved in the production and nano-size effects on human cells. Mitigation strategies like environmental-friendly processes for fabrication of MOFs and shaping using polymer are suggested. Various advantages from MOFs make them suitable for water treatment in the near future.
    Keywords adsorption ; catalytic activity ; cost effectiveness ; filtration ; humans ; ligands ; polymers ; solvents ; surface area ; toxicity ; wastewater ; water purification ; water quality
    Language English
    Dates of publication 2022-0826
    Size p. 4038-4071.
    Publishing place Taylor & Francis
    Document type Article
    ZDB-ID 2030115-7
    ISSN 1547-6537 ; 1064-3389
    ISSN (online) 1547-6537
    ISSN 1064-3389
    DOI 10.1080/10643389.2021.1975444
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top