Han Yan

ORCID: 0000-0002-4578-8407
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Research Areas
  • Ecology and Vegetation Dynamics Studies
  • Cholinesterase and Neurodegenerative Diseases
  • Phase Equilibria and Thermodynamics
  • Traditional Chinese Medicine Analysis
  • Mycorrhizal Fungi and Plant Interactions
  • Computational Drug Discovery Methods
  • Alzheimer's disease research and treatments
  • Soil Carbon and Nitrogen Dynamics
  • Plant Parasitism and Resistance
  • Forest Ecology and Biodiversity Studies
  • Advanced Combustion Engine Technologies
  • Ecology and Conservation Studies
  • Plant and animal studies
  • Forest Insect Ecology and Management
  • Phytochemistry and Biological Activities
  • Chemical Thermodynamics and Molecular Structure
  • Tribology and Lubrication Engineering
  • Insect Pheromone Research and Control
  • Thermodynamic and Exergetic Analyses of Power and Cooling Systems
  • Plant Water Relations and Carbon Dynamics
  • Rangeland Management and Livestock Ecology
  • Traditional Chinese Medicine Studies
  • Thermal and Kinetic Analysis
  • Thermochemical Biomass Conversion Processes
  • Phytochemical Studies and Bioactivities

Shandong University of Technology
2025

Chinese Academy of Sciences
2004-2024

University of Chinese Academy of Sciences
2007-2024

Second Xiangya Hospital of Central South University
2024

Central South University
2024

Nanjing University
2023-2024

Institute of Geographic Sciences and Natural Resources Research
2020-2024

Freie Universität Berlin
2022-2024

Changchun Institute of Optics, Fine Mechanics and Physics
2024

Berlin Brandenburg Institute of Advanced Biodiversity Research
2024

Summary The root economics space (RES) is multidimensional and largely shaped by belowground biotic abiotic influences. However, how root–fungal symbioses edaphic fertility drive this complexity remains unclear. Here, we measured absorptive traits of 112 tree species in temperate subtropical forests China, including linked to functional differences between arbuscular mycorrhizal (AM) ectomycorrhizal (ECM) hosts. Our data, from known species, revealed a ‘fungal‐symbiosis’ dimension...

10.1111/nph.18066 article EN New Phytologist 2022-03-04

Plant species diversity affects carbon and nutrient cycling during litter decomposition, yet the generality of direction this effect its magnitude remains uncertain. With a meta-analysis including 65 field studies across Earth’s major forest ecosystems, we show here that decomposition was faster when composed more than one species. These positive biodiversity effects were mostly driven by temperate forests but variable in other forests. Litter mixture emerged most strongly early stages...

10.7554/elife.55813 article EN cc-by eLife 2020-06-26

Abstract To adapt to the complex belowground environment, plants make trade-offs between root resource acquisition and defence ability. This includes forming partnerships with different types of associating microorganisms, such as arbuscular mycorrhizal ectomycorrhizal fungi. These trade-offs, by mediating chemistry, exert legacy effects on nutrient release during decomposition, which may, in turn, affect ability new roots re-acquire resources, thereby generating a feedback loop. However,...

10.1038/s41467-024-49666-3 article EN cc-by Nature Communications 2024-06-21

Extensive grassland degradation under climate change and intensified human activities has threatened ecological security caused a variety of environmental problems. However, it is still challenging to predict the status on large scale because multi-factorial phenomenon with complex changes in ecosystem structure function, which hard be fully characterized through mechanism models. The emergence machine learning algorithms provides potential model systems mine information from multi-source...

10.1016/j.ecolind.2022.108738 article EN cc-by Ecological Indicators 2022-03-07

This study addresses the issue of grain crushing during mechanical harvesting soybeans, systematically analyzing effect moisture content on its characteristics. Single-factor and multi-factor orthogonal experimental methods were employed to record process through compression tests combined with high-speed camera technology, allowing for a quantitative analysis content, loading speed, direction, their interactions. Field experiments conducted in five different planting areas, The results...

10.35633/inmateh-75-20 article EN INMATEH Agricultural Engineering 2025-04-08

Abstract Home‐field advantage (HFA) states that litter decomposes faster in “home” than “away” soil, due to the specialization of decomposer organisms decomposing derived from their local plant community. Demonstration HFA effect has been overwhelmingly based on aboveground leaf despite fact roots play a pivotal role carbon (C) and nutrient cycling. Labile C input root exudates newly shed litters can enhance activity soil microorganisms, which turn favour breakdown older litter, also...

10.1111/1365-2435.14251 article EN Functional Ecology 2022-12-16

The metabolite profiling of fruits the herb Ligustrum lucidum Ait collected during different months has been performed using ultra‐performance liquid chromatography with quadrupole time‐of‐flight mass spectrometry (UPLC/QTOFMS) and multivariate statistical analysis techniques. markers such as oleuropein acid, neonuezhenide, specnuezhenide, ligustrosidic acid accountable for variations were identified through loadings plot principal component (PCA), tentative identification is completed by...

10.1002/rcm.5036 article EN Rapid Communications in Mass Spectrometry 2011-05-19

Health care for the elderly is one of key issues in field public health. In context global aging, government's policy framework affects development local care. The priorities and instruments are important windows understanding planning system. This paper uses a quantitative text analysis method based on mining to analyze 3,618 provincial policies China. Considering pilot demonstration projects selected by Chinese government recent years, this finds that have three-phase evolution, each phase...

10.3389/fpubh.2021.647670 article EN cc-by Frontiers in Public Health 2021-07-23

This study is to explore the involvement of muscarinic acetylcholine receptors/protein kinase C cascade and mitogen-activated protein pathway in effect huperzine A on secretory amyloid precursor protein-alpha. Upregulation protein-alpha by was attenuated receptor antagonist (specifically M1-muscarinic antagonist), markedly blocked (-37.7%) inhibitor as well. Meanwhile, can activate phosphorylation and, accordingly, partly restored PD98059-decreased secretion. In addition, largely inhibited...

10.1097/wnr.0b013e3280c1e28c article EN Neuroreport 2007-04-10

Abstract Although herbivores are well known to incur positive density‐dependent damage and mortality, thereby likely shaping plant community assembly, the response of belowground root feeders changes in density has seldom been addressed. Locally rare species (with lower biomass per area) often smaller with shallower roots than common higher competition‐intensive grasslands. Likewise, distributed upper soil layers. We hypothesized, therefore, that would negative (biomass)‐dependent across...

10.1002/ecy.4285 article EN Ecology 2024-03-24

The pyrolysis kinetics of invasive plant Spartina anglica biomass was investigated via a thermogravimetric (TG) analyzer from 50 to 800°C in an inert argon atmosphere at different heating rates 5–30°C/min, and the kinetic parameters were deduced by Starink master-plots methods. results showed that three stages appeared thermal degradation process, mean value activation energy calculated be 291.57 kJ/mol method. It suggested most probable model g(α) = [−ln(1-α)]4 method, which meant random...

10.1080/15567036.2015.1120825 article EN Energy Sources Part A Recovery Utilization and Environmental Effects 2016-10-01

Abstract The marine macroalgae green tides occurring frequently produced a great quantity of macroalgal wastes from 2007 to 2011 in China. pyrolytic characteristics and kinetics one kind tide macroalgae, Enteromorpha prolifera, was investigated by the thermogravimetric analysis method at heating rates 10, 20, 30, 40, 50°C/min. corresponding activation energy E pre-exponential factor A were calculated mechanism functions determined double extrapolation Flynn-Wall-Ozawa methods based on data....

10.1080/15567036.2011.610871 article EN Energy Sources Part A Recovery Utilization and Environmental Effects 2012-09-04

A sensitive and selective method based on gas chromatography hyphenated to mass spectrometry (GC-MS) was developed validated for the determination of atractylon in rat plasma. Plasma samples were processed by liquid-liquid extraction with ethyl acetate-n-hexane (1:1, v/v) using acetophenone as an internal standard (IS). Analytes determined ion monitoring (SIM) mode target ions at m/z 108.1 105.1 acetophenone. The calibration curve linear over concentration range 10-1000 ng/mL lower limit...

10.1016/j.jpha.2015.03.002 article EN cc-by-nc-nd Journal of Pharmaceutical Analysis 2015-05-08

Aims Amygdalus pedunculata is a relict shrub plant, distributed in arid and semi-arid deserts mountainous areas of northwest China.In order to understand its distribution evolution under the historical climate change, we performed an analysis on 60 natural points 8 environmental factors, using GIS spatial maximum entropy model MaxEnt 3.4.1.We then analyzed changes geographical distributions their drivers A. during Last Inter Glacial (LIG), Maximum (LGM) present period. MethodsBased simulated...

10.17521/cjpe.2021.0406 article EN Chinese Journal of Plant Ecology 2022-01-01
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