Promotores: Prof.dr.G.R. de Snoo and Dr. R. Heijungs

What are the key issues in conducting LCA of bioenergy systems? What is the environmental sustainability status of second generation bioethanol? How much would the final results of biogenic carbon neutrality assumptions deviate from the true values based on a complete inventory? How to assess the impact…

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

Pectin is a plant cell wall polysaccharide made of mainly D-galacturonic acid (GA) subunits. The potency of the filamentous fungus Aspergillus niger to naturally secrete high amounts of pectinases to degrade pectin has been utilized for the industrial production of pectinases.

An algorithm is discussed to compute the exponential representation of principal units in a finite extension field F of the p-adic rationals.

Aspergillus niger is an important industrial producer of organic acids and enzymes producing large amounts of spent fungal biomass.

How can we quantify the density of species within a community through environmental DNA concentrations?

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.

Dr. Erik Vijgenboom (IBL) and Dr. Peter Punt (IBL/TNO) obtained a new NWO-grant for their project FILAZYME to develop filamentous micro-organisms for enzyme production to degrade biomass.

Development of GHG calculator for bio-electricity and heat.

Promotors: Prof.dr. E. Bouwman, Prof.dr. E. Drent

Prof.dr. Annelou van Gijn has obtained a Marie Curie subsidy for research on wetland activity patterns in Mesolithic Northwest Europe. This funding has been used to employ the researcher dr. Aimée Little. The project will commence in November 2011.

Commercial enterprises who want to make use of the expertise and facilities are referred to LAB , the commercial unit responsible for specialized laboratory work.

How did people experience Islam on a day-to-day basis in the early centuries of Islam? That's where the papyri come in, says professor of Arabic Petra Sijpesteijn in the fourth video of the Leiden | Islam interview series.

Tracking early human behaviour through plant processing and -exploitation.

When oil is harvested from the seeds of the oil palm tree, the fruit residue can be used to make bio-ethanol. However, it can also be used as a fertilizer on palm tree plantations; which option is best for the environment? Edi Wiloso compared the two green options at the Institute of Environmental Sciences…

Examining the sustainability aspects of biotechnology, especially those related to the production of ethanol from biomass.

Our object is to identify and characterize transcription factors involved in lignocellulosic biomass degradation in the filamentous fungus Aspergillus niger.

Can we develop new enzymes and cell factories to upgrade current enzyme cocktails towards complete degradation of biomass?

PhD Defence

Promotor: P.J.J. Hooykaas, Co-Promotor: E.J. van der Zaal

The Institute of Environmental Sciences has carried out and participates in several projects that deal with the analysis of energy systems.

Source: Biochem Pharmacol, Volume 95, Issue 4, pp. 290-300 (2015)

PhD Defence

Promotor: P. Stevenhagen, Co-promotores: B. de Smit, F. Andreatta

Promotor: A.P. IJzerman

This thesis describes the design and development of subunit‐selective inhibitors of particular catalytically active subunits of human constitutive proteasomes and immunoproteasomes.

In this study, we evaluated the influence of supercritical carbon dioxide (scCO2) spray drying conditions, in the absence of organic solvent, on the ability to produce dry protein/trehalose formulations at 1:10 and 1:4 (w/w) ratios.

What is better for waste recycling: a plastic, paper or ceramic cup? A bio-based or fossil-based coating? Waste sorting at the source or at a recycling facility? Ask ten experts and you will get ten different opinions. We can all agree on one thing: doing nothing is not an option. Thus, Leiden University…

Description of Effects of glufosinate-ammonium on off crop vegetation.

Master projects are available in

Source: Purinergic Signal., Volume 10, Issue 3, pp. 441-53 (2014)

PhD Defence

The programme’s courses deal with current approaches in material culture theory, analytical methods and techniques employed in artefact studies, and experimental archaeology.

Our staff has a strong international reputation and a broad research network, facilitating international student exchange. They lead projects world-wide, from France to the Caribbean, and from Ethiopia to Russia.

How do the starchy botanical foodways reflect upon previous archaeological understandings in the northern and circum-Caribbean?

Explore the unknown in order to be able to innovate in the distant future.

Papers written on the occasion of the 30th anniversary of the institute of Prehistory, Volume II.

Promotores: S.J. Edixhoven, P.Parent

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

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…

Solar energy harnessed by plants and algae has great potential to be converted into biofuels for future generations.

Understanding the water use of power production is an important step to both a sustainable energy transition and an improved understanding of water conservation measures. However, there are large differences across the literature that currently present barriers to decision making.

How presence, abundance and enzymatic activities of AM and EM fungi differently affect soil carbon sequestration processes?

Promotor: J.A. van Veen, Co-promotor: E.E. Kuramae

PhD Defence