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- Eleonora Egidi, Gerrit Sybren de Hoog, +7 authors Laura Selbmann
- Fungal Diversity
- 2013

The last decade has revealed an unexpected fungal diversity associated with natural rocks, often collected in environments influenced by harsh climatic conditions. Yet the phylogenetic affiliations and the taxonomy of many of these extreme fungi, mainly within Dothideomycetes, the largest class of Ascomycota, have only partially been described. In the… (More)

Let β > 1 be a non-integer. We consider expansions of the form ∑∞ i=1 di βi , where the digits (di)i≥1 are generated by means of a Borel map Kβ defined on {0, 1} N × [0, bβc/(β − 1)]. We show existence and uniqueness of an absolutely continuous Kβ-invariant probability measure w.r.t. mp ⊗ λ, where mp is the Bernoulli measure on {0, 1} N with parameter p (0… (More)

It was discovered some years ago that there exist non-integer real numbers q > 1 for which only one sequence (ci) of integers 0 ≤ ci < q satisfies the equality P∞ i=1 ciq −i = 1. The set U of such “univoque numbers” has a rich topological structure, and its study revealed a number of unexpected connections with measure theory, fractals, ergodic theory and… (More)

- Derlene Attili-Angelis, Ana Paula Miranda Duarte, +4 authors Gerrit Sybren de Hoog
- Fungal Diversity
- 2013

Ants in the tribe Attini (Hymenoptera, Formicidae) maintain a 50 million-year-old lifestyle of co-evolution with symbiotic basidiomycetous fungi which they cultivate as essential source of nutrition. However, other microorganisms have been reported from ant habitats indicating a higher diversity of consistently associated species than established to date.… (More)

- Martijn de Vries
- 2006

Consider the set U of real numbers q ≥ 1 for which only one sequence (ci) of integers 0 ≤ ci ≤ q satisfies the equality P ∞ i=1 ciq −i = 1. In this note we show that the set of algebraic numbers in U is dense in the closure U of U .

- Martijn de Vries
- 2012

This work investigates the Color-Magnitude (C-M) relation for early-type galaxies. The recent WISE and Spitzer infrared surveys have opened up the possibility to study the C-M relation for galaxies in the nearand mid-Infrared. For the C-M relation four different samples from different sources are used, ranging from a Virgo Cluster sample of dwarf… (More)

Abstract. For a given positive integer m, let A = {0, 1, . . . , m} and q ∈ (m,m+ 1). A sequence (ci) = c1c2 . . . consisting of elements in A is called an expansion of x if ∑ ∞ i=1 ciq −i = x. It is known that almost every x belonging to the interval [0,m/(q − 1)] has uncountably many expansions. In this paper we study the existence of expansions (di) of x… (More)

- Martijn de Vries
- 2008

Let q > 1 be a real number and let m = m(q) be the largest integer smaller than q. It is well known that each number x ∈ Jq := [0, P ∞ i=1 mq ] can be written as x = P ∞ i=1 ciq −i with integer coefficients 0 ≤ ci < q. If q is a non-integer, then almost every x ∈ Jq has continuum many expansions of this form. In this note we consider some properties of the… (More)

- Martijn de Vries, Miquel Bart Ekkelenkamp, Edgar J. G. Peters
- European Journal of Clinical Microbiology…
- 2013

The objective of this study was to determine if specific species of microorganisms are associated with severe infection and amputation in patients with a diabetic foot infection and to evaluate the effectiveness of clindamycin and ciprofloxacin in this population. A retrospective cohort study was performed at the University Medical Center Utrecht, The… (More)

- B.-U. Moon, Martijn de Vries, Carlos Cordeiro, A.J.M. Schoonen, B. H. C. Westerink, Elisabeth Verpoorte
- 2010

We present here an application of a newly-designed enzymatic microreactor (EMR) for continuous glucose monitoring in rats. The EMR was based on electrochemical detection and was coupled with a microdialysis probe which was inserted into the subcutaneous tissue of anesthetized rats. The performance of the EMR was evaluated by modulating blood glucose… (More)

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