Yuri Robbers

Leiden University Medical Centre | LUMC · Department of Molecular Cell Biology

In this study, we investigated the effect of social environment on circadian patterns in activity by group housing either six male or six female mice together in a cage, under regular light–dark cycles. Based on the interactions among the animals, the social dominance rank of individual mice was quantitatively established by calculating Elo ratings...

Background Many physiological processes in our body are controlled by the biological clock and show circadian rhythmicity. It is generally accepted that a robust rhythm is a prerequisite for optimal functioning and that a lack of rhythmicity can contribute to the pathogenesis of various diseases. Here, we tested in a heterogeneous laboratory zebraf...

Seeds of cultivars of the crop oil seed rape (Brassica napus) differ widely in their content of glucosinolates (GS) and erucic acid (EA), while seeds of the wild relative B. rapa have a high content of both. If mice were to distinguish between the seed types this could affect persistence of plant populations.

Animals have circadian clocks that govern their activity pattern, resulting in 24 h rhythms in physiology and behaviour. Under laboratory conditions, light is the major external signal that affects temporal patterns in behaviour, and Mus musculus is strictly nocturnal in its behaviour. In the present study we questioned whether under natural condit...

The importance of exercise for health and neurogenesis is becoming increasingly clear. Wheel running is often used in the laboratory for triggering enhanced activity levels, despite the common objection that this behaviour is an artefact of captivity and merely signifies neurosis or stereotypy. If wheel running is indeed caused by captive housing,...

Barbelenverhalen Het begon allemaal met de vraag waar de donkere strepen en vlekken op de flanken van aquariumvisjes - barbelen - toe dienden. Zo veel soorten barbelen, allemaal weer anders getekend en gekleurd, en ieder met hun eigen bijzondere paaigedrag. Ideaal voor vergelijkend biologisch onderzoek: waarom al die variatie? Tropische landschap...

The cover of a book presents the first impression for any potential readers or book buyers. Therefore it is of vital importance this impression is a good one. This paper offers general notes on cover design, and specific notes on implementing such designs using PSTricks.

KOMA is a complete replacement of the standard L A T E X2 ε classes. It is aimed more at European typography but is easily configurable. Some of KOMA's extensions and ways to configure document layout are also avail-able in other document classes, such as the L A T E X2 ε standard classes. This paper discusses just a few parts of KOMA, especially t...

The Agonic and Hedonic Styles of Social Behaviour Kortmulder, Koenraad , & Robbers, Yuri Description Michael Chance created the concept of two modes of social interaction, agonic and hedonic. The one based upon threat, power and anxiety; the other on playful catching of attention and prestige. Whereas the rhesus macaque’s social system in mainly...

There are many ways in which the PDFpages package (Matthias, 2006) can be helpful to editors. An obvious one is collating several papers into one. This paper will describe a few of the many ways in which pdfpages can make life easy for the editor and publisher.