201 zoekresultaten voor “soil barrier” in de Publieke website
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Understanding disease suppressive soils
Soil is a home for an unbelievable diversity and abundance of microbial life that is essential for supporting life on our planet.
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Using soil inoculations for ecological restorations
How soil microbial composition impacts structure and composition of the aboveground plant and animal communities?
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Soil legacy effects on aboveground plant-insect interactions
In this thesis, the role of plant-mediated soil legacy effects in shaping aboveground plant-insect interactions was investigated.
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Plant-soil interactions determine ecosystem aboveground and belowground processes in primary dune ecosystems
Soil biodiversity is of great importance for the maintenance of multifunctionality in terrestrial ecosystems.
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Soil and crop management options to improve nitrogen cycling on dairy farms on peat soil
The main research question of this thesis was: Can nitrogen cycling on dairy farms on peat soil in the Dutch Green Heart area be improved by adapting management to the nitrogen supply from soil and by using other grassland species and crops without affecting milk production?
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impact of defense hormones on the interaction between plants and the soil microbial community
The soil ecosystem consists of the largest reservoir of biodiversity on Earth.
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Microbial communities in Pampa soils; impact of land use changes, soil type and climatic conditions
Promotor: J.A. van Veen, Co-promotor: E.E. Kuramae
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Ecological functioning of bacterial chitinases in soil
Promotores: Prof.dr. H. van Veen & Prof.dr. W. de Boer (Wageningen University)
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the root of variation: A metabolomics perspective to plant soil-feedback
By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.
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differ? Understanding the mechanisms of mycorrhizal fungal impacts on soil C sequestration
How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?
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Assemblage and functioning of bacterial communities in soil and rhizosphere
Promotores: J.A.van Veen, P.L.G.Klinkhamer. Co-promotor: E.E.Kuramae
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Learning from nature: using plant-soil feedback principles to improve growth and health of a horticultural crop
Plants and soils from natural ecosystems harbor great diversity of soil microorganisms, which could potentially contribute to the sustainability of horticulture. The knowledge about using wild plant species and soil from natural ecosystem to improve the crop health will advance the application of ecological…
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interactions in Jacobaea vulgaris: zooming in and zooming out from a plant-soil feedback perspective
In this thesis, I focused on studying the above- and belowground interactions of J. vulgaris from a plant-soil feedback (hereafter, PSF) perspective. I investigated the temporal variation of negative PSF and examined the effects of root-associated bacteria on plant performance and aboveground herbiv…
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Lipids as therapeutic targets for barrier repair in skin diseases
The skin is our natural barrier and lipids are a key part of this barrier. In the outer skin layer, the stratum corneum (SC), lipids form a densely organized structure dependent on the composition of these lipids.
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Modelling the role of mycorrhizal associations in soil carbon cycling: insights from global analyses of mycorrhizal vegetation
In this PhD study, I aim to deepen our understanding of the influence of major mycorrhizal types, namely arbuscular mycorrhizae (AM) and ectomycorrhizae (EM), on the global soil carbon cycle and their potential distribution changes under future environmental shifts.
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Impact of nitrogen fertilization on the soil microbiome and greenhouse gas emission
The use of N fertilizers has increased worldwide in the past century. While this increased input of N has increased food productivity, it has also contributed to decreases in biodiversity, soil quality and environmental health, including increases in greenhouse gas emissions.
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atopic dermatitis: investigating the role of filaggrin in the skin barrier
Promotor: Prof.dr. J.A. Bouwstra, Co-promotor: A. El Ghalbzouri
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Linking soil microbial community dynamics to N2O emission after bioenergy residue amendments
Vinasse is a major by-product generated by the sugarcane biofuel industry. It is a source of microbes, nutrients and organic matter and often it is recycled as fertilizer.
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Development of human skin equivalents to unravel the impaired skin barrier in atopic dermatitis skin
Promotor: J.A. Bouwstra Co-promotor: A. El Ghalbzouri
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A novel formulation for skin barrier repair : from ex vivo assessment towards clinical studies
The stratum corneum is the outermost skin layer and consists of dead cells embedded in a lipid matrix.
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Dyslipidemia at the crossroad of the skin barrier and the arterial wall
The research described in this thesis shows that hypercholesterolemia, a well-established risk factor for atherosclerosis, can impact skin lipid pool and barrier function already at young age. In the field of atherosclerosis, we showed that the small peptide Lyp-1 can be used as a targeting molecule…
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role of ceramide subclass composition on lipid organization and skin barrier
The lipids in the uppermost layer of the skin, the stratum corneum (SC), play an important role in the skin barrier function. The three main SC lipid classes are ceramides (CER), cholesterol and free fatty acids.
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Breaking the witches' spell: towards steering the soil microbiome for volatile-mediated control of the root parasitic weed Striga
Striga hermonthica, commonly known as witchweed, infests major cereal crops in Sub-Saharan Africa causing severe yield losses and threatening the livelihood of millions of resource poor farmers.
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Membrane Approach to Elucidate the Molecular Organization in the Skin Barrier
Promotor: J. A. Bouwstra
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membrane systems as a tool for unraveling the underlying factors for skin barrier dysfunction
Barrier function is the natural role of the skin. The lipid matrix present in the outermost layer of the skin, the stratum corneum is important for this function.
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of Human Mobility and Farming Systems and Impacts on Biodiversity and Soil Quality in the Western Highlands of Cameroon
Promotors: Prof.dr. G.R. de Snoo, Prof.dr. G.A. Persoon, Prof.dr.ir. H.H. de Iongh
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A culture medium based approach to optimize the stratum corneum barrier of human skin equivalents
uman skin equivalents (HSEs) are in vitro 3D-skin models that mimic many aspects of the native human skin (NHS) and can be a valuable tool.
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‘Gemeentegrenzen kunnen barrières zijn’
Agglomeraties presteren minder goed dan steden met één bestuur. Dat blijkt uit onderzoek van Ton van Raan, professor kwantitatief wetenschapsonderzoek.
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Global distribution patterns of distinct mycorrhizal types and ecological drivers of these patterns
What are the global relationships between environmental conditions and abundance of distinct types of mycorrhizal fungi in soil and plant roots?
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Isabel Siles AsaffWiskunde en Natuurwetenschappen
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Wetenschap en missie: Jan Willem Erisman in de Europese Soil Mission Board
Jan Willem Erisman wilde als kind al dingen beter maken. Als hoogleraar Duurzaamheid en Milieu is hij daarom ook buiten de universiteit actief. Hij staat bekend als de stikstofprofessor: in de media, maar ookin de Tweede Kamer legt hij het stikstofprobleem uit. Recent trad hij toe tot de Europese Soil…
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Prijs voor 'Breaking down barriers' project van Afrika-Studiecentrum en Liliane Fonds
Het Liliane Fonds en het Afrika-Studiecentrum van de Universiteit Leiden hebben de Impact Challenge Award 2019 gewonnen voor het project 'Breaking down barriers to exclusion. Building capacity for lobby and advocacy for children with disabilities'. De Impact Challenge Award is een nationale onderscheiding…
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Sophie PlanchenaultWiskunde en Natuurwetenschappen
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Quantitative modelling of the response of earthworms to metals
Promotor: Prof.dr. W.J.G.M. Peijnenburg
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Prediction of brain target site concentrations on the basis of CSF PK: impact of mechanisms of blood-to-brain transport and within brain distribution
Promotor: M. Danhof, Co-promotor: E.C.M. de Lange
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Fate, accumulation and impact of metallic nanomaterials in the terrestrial environment
The rapidly increasing commercial application of metallic nanoparticles within products will inevitably enhance the amount of NPs being released into soil.
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Effect of Nanoparticles on Microbial Catabolism and Community Structure using Biolog techniques
1. To what extent do metallic NPs added to soil extractions change the activity, abundance, or community composition of microbes? 2. How do the effects of metallic NPs on soil microbes differ from the effects of the ions shedding from corresponding NPs?
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Understanding the role of mycorrhizas in global carbon cycle processes
How the global distribution of vegetation stands dominated by arbuscular and ectomycorrhizal plants relate to principle aspects of belowground carbon accumulation processes?
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Impact of plant domestication on spermosphere and rhizosphere microbiome composition
Microbiome composition of the spermosphere and the rhizosphere of wild and modern bean accessions grown in an agricultural and a native soil from Colombia was characterized by metagenomics and cultivation-dependent approaches.
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Hazal KandemirWiskunde en Natuurwetenschappen
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Volatile compounds from Actinobacteria as mediators of microbial interactions
Streptomyces are bacteria abundant in soil that participate in diverse and complex interactions. These bacteria are the main producers of the antibiotics we currently use in the clinic.
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Fungi of the greening Arctic: compositional and functional shifts in response to climatic changes
Promotor: E.F. Smets Co-promotor: J. Geml
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Peeking into the future: Fungi in the greening Arctic
Promotor: E.F. Smets, Co-promotor: J. Geml
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The Ecology and Evolution of Microbial Warfare in Streptomyces
The soil-dwelling, filamentous bacteria of the genus Streptomyces are renowned for their production of useful secondary metabolites including antibiotics. The work described in this thesis provides new insights on the role and regulation of antibiotic production and resistance in these bacteria.
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Nano shapes micro : Impacts of metallic nanoparticles on microbial communities
This thesis aimed to investigate the impact of exposure dynamics, relative contributions of ENPs(particle) and ENPs(ion), and dosing regimens on the toxicity of ENPs varying in different physico-chemical properties, on the composition and functioning of soil microbial communities.
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Barrier Free Studying Lunch Meeting
Lezing
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Development of life cycle assessment for residue-based bioenergy
Promotores: Prof.dr.G.R. de Snoo and Dr. R. Heijungs
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Morphogenesis and heterogeneity in liquid-grown streptomyces cultures
The filamentous bacteria Streptomyces are widespread inhabitants of terrestrial soils.
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Micro-leven bij biologische en gangbare melkveebedrijven voor het eerst in kaart gebracht
Elk onderdeel van de kringloop op een melkveebedrijf heeft een specifieke bacterie- en schimmelsamenstelling. Dat ontdekten de Leidse postdoc onderzoeker Sofia Gomes en haar begeleiders Nadia Soudzilovskaia en Peter van Bodegom in samenwerking met het Louis Bolk instituut en Naturalis Biodiversity Centre.…
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Een artistieke kijk op verborgen bodemschimmels
Muziek van een composteerbare cello, foto’s en geurtjes van schimmels en een geweven wandkleed. Het zijn een aantal voorbeelden uit Super Organism, het kunstproject van Suzette Bousema waarin je de ondergrondse schimmelwereld met al je zintuigen kunt beleven. Leids milieuwetenschapper Nadia Soudzolovskaia…