542 zoekresultaten voor “isotope analysis” in de Publieke website
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Structural and functional analysis of proteins involved in natural product biosynthesis and morphological differentiation in Streptomyces
Streptomyces present a valuable platform for natural product discovery. Lugdunomycin is a novel angucycline-derived polyketide from Streptomyces sp QL37, with unprecedented skeleton and antimicrobial activity.
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Analysis of the angucycline biosynthetic gene cluster in Streptomyces sp. QL37 and implications for lugdunomycin production
Streptomyces bacteria are a valuable source of natural products, many of which are used in the clinic or in biotechnology.
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guineensis Benth. (Asteraceae): bioactivity, safety, and phytochemical analysis
Promotor: Prof.dr. R. Verpoorte, Co-Promotor: Dr. Young Hae Choi
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Who is Afraid of More Women in Politics, and Why? An Analysis of Public Opinion in 28 European Countries
In dit artikel bestuderen de auteurs hoe individuele variabelen en variabelen op landelijk niveau op elkaar inwerken bij het beïnvloeden van politieke genderattitudes in Europa.
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Who gets what, when, and how? An analysis of stakeholder interests and conflicts in and around Big Science
Big Science, commonly defined as conventional science made big in three dimensions, namely organizations, machines, and politics, brings a plethora of different stakeholders together, often for a long period of time. This includes policymakers, scientists, (scientific) managers as well as local “host”…
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Dimensions of desistance: A qualitative longitudinal analysis of different dimensions of the desistance process among long-term prisoners in
Op 5 september 2019 verdedigde Jennifer Doekhie haar proefschrift 'Dimensions of desistance: A qualitative longitudinal analysis of different dimensions of the desistance process among long-term prisoners in the Netherlands'. Het promotieonderzoek is begeleid door promotor prof.dr. P. Nieuwbeerta.
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achieving agri-food sustainability from a spatially explicit input-output analysis perspective
The global agri-food system plays a critical role in food security and environmental issues.
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Fisheries in the Waza Logone Floodplain. An Analysis of the Status of the Fisheries Sector and Mitigation of Conflicts within the Sector in North
Promotores: Prof.dr. G.A. Persoon & Prof. dr. H.H. de Iongh
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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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Mining Sensor Data from Complex Systems
Promotor: J.N. Kok, Co-Promotor: A.J. Knobbe
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A meta-analysis of wetland plant traits in relation to the strategies of wetland plants and the impacts on ecosystem functioning
What are trait-trait relationships in wetlands? To what extent the so-called leaf economics traits deviate from terrestrial ecosystems? How traits specific to wetland plant relate to plant strategies? What’s the relationship between wetland plant traits to the ecosystem functioning (e.g. productivity,…
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Statistical modelling of time-varying covariates for survival data
This dissertation focuses on developing new mathematical and statistical methods to properly represent time-varying covariates and model them within the context of time-to-event analysis.
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Adaptive responses to environmental changes in Lake Victoria cichlids
Promotor: M.K. Richardson, Co-Promotor: F. Witte
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Fuzzy systems and unsupervised computing: exploration of applications in biology
In this thesis we will explore the use of fuzzy systems theory for applications in bioinformatics.
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Cosmic tomography with weak gravitational lensing
We explored the Universe using weak gravitational lensing, a phenomenon that occurs when light from distant galaxies is bent by the gravitational fields of closer cosmic objects, much like how a lens distorts light.
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Guiding safe and sustainable technological innovation under uncertainty: a case study of III-V/silicon photovoltaics
A framework for prospective/ex-ante life cycle assessment (LCA) and ecological risk assessment (ERA) of emerging technologies is developed and applied to a case study of III-V/silicon photovoltaic panels.
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Moderne mens arriveerde waarschijnlijk eerder in de Levant
Nieuwe koolstofdateringen van schelpen wijzen erop dat moderne mensen al minstens 45.900 jaar geleden in de Levant in Zuidwest-Azië leefden en van daaruit Europa koloniseerden. Dat is een paar duizend jaar eerder dan tot nu toe werd gedacht.
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Lithium-ion batteries and the transition to electric vehicles
The transition to electric vehicles (EVs) reduces vehicle emissions to combat climate change. EVs raise concerns regarding the production of lithium-ion batteries and related emissions; while batteries can also provide energy storage services for the electricity system.
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Benchmarking Discrete Optimization Heuristics
This thesis involves three topics: benchmarking discrete optimization algorithms, empirical analyses of evolutionary computation, and automatic algorithm configuration.
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Natural Products Lab
Wij richten ons op natuurlijke producten van onderzoek, de traditionele geneeskunde, etnobotanie en fytochemie.
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Orchestration of Distributed LOFAR Workflows
The LOFAR radio telescope produces petabytes of data every year. Radio Astronomers use complex multi-step pipelines to process this data and produce scientific images.
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Systematics and biogeography of the rattan Calamus javensis complex (Arecaceae, Calamoideae) in Malesia
Calamus javensis is polymorphic. Morphometry and molecular approach resulted in all names used in the complex are regarded as synonyms of C. javensis except C. tenompokensis, which is retained as a distinct species. One variety is here recognized, C. javensis var. polyphyllus (including C. acuminatu…
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Opportunity and Problem in Context (OPiC). A framework for environmental management in developing countries
Promotor: W.T. de Groot
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Structural Health Monitoring Meets Data Mining
Promotor: Prof.dr. J.N. Kok, Co-promotor: A.J. Knobbe
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Md Faysal Tareq
Wiskunde en Natuurwetenschappen
m.f.tareq@cml.leidenuniv.nl | +31 71 527 2727
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'Solidarity under strain - A legal, criminological and economic analysis' - Leiden Interdisciplinary Migration Seminar
Wednesday 16 November 2016, 12.30-14.00
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Op zoek naar een verklaring voor bijzonder gedrag van ijs op aarde
Als je de standaard waterstofatomen in ijs vervangt door een zwaardere variant dan gebeurt er iets geks. Het volume dat de moleculen innemen groeit met 0,1 procent. De Leidse chemicus Jörg Meyer en zijn collega’s hebben een theoretisch model gemaakt dat dit gedrag beschrijft. Hun onderzoek verscheen…
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Patterns in natural systems
Promotor: A. Doelman, Co-promotores: P.J.A. van Heijster; A. Zagaris
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Joeri Morpurgo
Wiskunde en Natuurwetenschappen
j.morpurgo@cml.leidenuniv.nl | +31 71 527 2727
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When materials become critical: lessons from the 2010 rare earth crisis
Promotor: G.J. Kramer Co-Promotor: E.G.M. Kleijn
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Statistical methods for microarray data
Promotores: J.C. van Houwelingen, S.A. van de Geer
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The energy and material related impacts of the transition towards low-carbon heating: a case study of the Netherlands
This dissertation investigates the energy and material related impacts of the transition towards a low-carbon heating system in the Netherlands, in the context of its 2050 climate and circular economy policy goals.
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Data-driven Predictive Maintenance and Time-Series Applications
Predictive maintenance (PdM) is a maintenance policy that uses the past, current, and prognosticated health condition of an asset to predict when timely maintenance should occur.
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Laboratory for Artefact Studies
Commerciële bedrijven die gebruik willen maken van de expertise en faciliteiten worden doorverwezen naar LAB , de commerciële eenheid die verantwoordelijk is voor gespecialiseerd laboratoriumwerk.
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Topics in mathematical and applied statistics
Promotor: A.W. van der Vaart
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Tromble & Meffert, 'The Life and Death of Frames'
Politicologen Rebekah Tromble en Michael Meffert (Universiteit Leiden) analyseren waarom sommige media frames aanhouden, terwijl andere frames snel in de vergetelheid geraken. Zij ontwikkelen een methode die is ontleend aan event-history. De casus die Tromble en Meffert bekijken, is de verslaglegging…
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Emilio Solis Sanchez
Wiskunde en Natuurwetenschappen
e.solis.sanchez@cml.leidenuniv.nl | +31 71 527 2727
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Personalised medicine for multiple outcomes: methods and application
The main objective of this thesis was to develop clinically relevant survival models for patients with high-grade soft tissue sarcoma of the extremities, in particular the development and validation of prediction models for use in clinical practice.
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Improving vegetation representation in Multi-sensor Earth Observation Products through phenology and trait-based priors
What are the behaviours of plant traits throughout various points in the growing season in a radiative transfer model framework and how well can this knowledge be integrated through data assimilation to provide priors for robust local and global vegetation products and analysis?
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Macro-level assessment of environmental implications of changes to circularity
How to ensure the environmental and economic benefits of circularity transition at macro-scale?
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Exploring strange new worlds with high-dispersion spectroscopy
Until the 1990s, the only known planets were those in our Solar System. Three decades later, several thousand exoplanets have been discovered orbiting stars other than the Sun, and substantial efforts have been made to explore these strange new worlds through spectroscopic analyses of their atmosphe…
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Withstanding the cold: energy feedback in simulations of galaxies that include a cold interstellar medium
Understanding how galaxies form, interact, and evolve comes largely from comparing theory predictions with observational data. Numerical simulations of galaxies provide the most accurate approach to testing the theory, as they follow the non-linear evolution of gas and dark matter in great detail and…
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The heart of oxygenic photosynthesis illuminated
Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia
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Applications of paramagnetic NMR spectroscopy for protein research
The aim of the research presented in this thesis was to develop new methods forchallenging systems in liquid-state NMR using paramagnetic effects generated by thetwo-armed probe CLaNP-5.
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Ecological functions and environmental fate of exopolymers of Acidobacteria
Acidobacteria is a widely distributed phylum but their functional roles in ecosystem processes are still largely elusive.
- Laboratory for Ceramics Studies
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Stereoelectronic and conformational effects in oxocarbenium, iminium and iminosugar ammonium ions
Promotores: Prof.dr. G.A. van der Marel, M. van Heel
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Stereoelectronic and conformational effects in oxocarbenium, iminium and iminosugar ammonium ions
Promotor: G.A. van der Marel, Co-promotor: J.D.C. Codée
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Don't Blink: Detecting transiting exoplanets with MASCARA
This thesis describes the Multi-site All-Sky CAmeRA (MASCARA), which consists of two small robotic telescope designed to detect exoplanets around the brightest stars in the sky.
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Spectral imaging and tomographic reconstruction methods for industrial applications
Radiography is an important technique to inspect objects, with applications in airports and hospitals. X-ray imaging is also essential in industry, for instance in food safety checks for the presence of foreign objects.