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.

Promotor: Prof.dr. G.R. de Snoo

Promotores: C. J. ten Cate; M. A. Ainslie. Co-promotor: W. Slabbekoorn

A century ago, it was unclear whether the stars in the sky were clustered in groups, or widely spread in the universe.

ASLU 11

One of the key limitations of the direct imaging of exoplanets at small angular separations are quasi-static speckles that originate from evolving non-common path aberrations (NCPA) to which the primary adaptive optics system is inherently blind. The main focus of this thesis is the development and…

How do humans, non-humans and their interactions and relations shape the home as ecological and social space?

CurveBend project aims to study the restauration of biodiversity in livestock landscapes through collective action, practical solutions, and research on ecological knowledge co-creation.

The Great Rift Valley in Africa is a real treasure trove for discovering early human fossils. The fossils found in this part of Africa have determined our view of human evolution. But was the Great Rift Valley really the place where evolution took place or just a place where fossils are well preserved…

Changing burial rites in Early Medieval Northern Gaul, 450-600 CE

This project consists of various case studies.

Despite being the object of intense study, embryonic development has been difficult to model due to a number of reasons. First, complex tissues can be comprised of many cell types, of which we probably only know a subset.

My PhD project studies how the temporally sequential Hox gene expression is regulated during head-tail patterning of the frog embryo.

We will study how inoculation of former arable land with soil (including the microbiome, soil fauna and seeds/rhizomes of ground flora) from old forests along with planting targeted tree species mixtures will improve productivity and more rapidly restore forest-adapted communities and ulttimately result…

Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

Arie van Steensel and Ariadne Schmidt (eds.)

A large diversity of exoplanetary systems has been found, but it is still unclear what drives this diversity.

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…

Promotor: Prof.dr. D. Bouwmeester, Co-promotor: M.P. van Exter

We study the interplay of topology and geometry with chirality for several passive and active systems, employing both analytical and numerical methods.

By growing in a soil plants change the biotic and abiotic properties of the soil in which they grow.

On 27 January 2022 Tjahjono Prasodjo successfully defended a doctoral thesis and graduated.

One of the effects of climate change is the phenomenon of desertification, a process that occurs in semi-arid and arid areas and causes land degradation as well as vegetation loss. Due to the lack of resources, vegetation self-organizes to sustain itself by forming large-scale spatial patterns.

The research connected to this topic is related to E-health.

Trajectories of social life in the yucayeque (community) of El Cabo, Higüey, Dominican Republic, AD 800 to 1504

Are you eager to explore traditional and experimental audiovisual methods for ethnographic research? Do you consider translating your research findings into a documentary? Are you highly motivated, committed and hard working? Then Visual Ethnography is the right specialisation for you! Visual Ethnography…

A Companion to Cities in the Greco-Roman World offers in-depth coverage of the most important topics in the study of Greek and Roman urbanism. Bringing together contributions by an international panel of experts, this comprehensive resource addresses traditional topics in the study of ancient cities,…

Amy Strecker assesses the institutional framework for landscape protection, analyses the interplay between landscape and human rights, and links the etymology and theory of landscape with its articulation in law.

Promotor: Prof.dr. E.F. van Dishoeck, Co-promotor: S. Bruderer

This research combines archaeological, archaeometric and ethnohistorical research to study the organisation of settlement space and residence rules among the Taino Indians during the Late Ceramic Age (AD 1000-1492).

Promotor: Prof.dr. K.H. Kuijken, Co-Promotor: Dr. H.Hoekstra

Holtz defended her dissertation ‘Collective human rights as an (onto)logical solution to climate change: reconceptualizing, applying and proceduralizing an overlooked category of human rights’ on 16 October 2025. The doctoral research was supervised by Carsten Stahn and Daniëlla Dam-de Jong.

Volume 20 contains eight articles based on research of the Faculty of Archaeology, Leiden University.

Promotor: Prof.dr. H. J. A. Röttgering, Co-Promotor: Dr. M. Haverkorn

Welcome to the Hensen Lab! We are a young dynamic experimental research group starting at the Leiden Institute of Physics. Our lab addresses one of the key challenges of modern physics: understanding the interface between quantum mechanics and general relativity.

Promotor: Ed F. Deprettere, Co-promotor: Todor P. Stefanov

Social Aspects of Space in the Configurational Architecture of Frankish Castles in the Holy Land, 1099-1291

This is a joint PhD of the Faculty of Social and Behavioral Sciences at Leiden University and the Evolutionary Ecology Group at Antwerp University.

Can photography embody the emotional and interpersonal aspects of home as well as participate in the social, political, and cultural debates on homemaking?

As an artist Clevis is fascinated by the phenomenon of place in relation to beginnings and final destinations.

Short introduction

Papers written on the occasion of the 30th anniversary of the Institute of Prehistory, Volume I.

Port cities develop at the intersection of international trade and commerce and at the interface between sea and land. What does the future of port cities look like with urbanization, sea level rise, new migrant flows and the disappearance of old industries? This is addressed in the minor (Re)Imagining…

To make the right clinical decisions or develop effective diagnostic tests and treatments, it is important to understand the underlying mechanisms of a condition or behavior.

The Caribbean before Columbus is a new synthesis of the region’s insular history. It combines the results of the authors’ 55 years of archaeological research on almost every island in the three archipelagoes with that of their numerous colleagues and collaborators.

Mechanical metamaterials are man-made materials which derive their unusual properties from their structure rather than their composition.