Université de Neuchâtel

The Tick Blood Meal: From a Living Animalor from a Silicone Membrane ?

Kröber, Thomas ; Guerin, Patrick M.

In: Altex, 2007, vol. 24, p. 39-41

An artificial feeding unit with a reinforced silicone membrane to replace host skin provides ticks with a perch over blood with a tick attachment rate of 75-100%. Some 5 mg of an acaricide like fipronil is sufficient to establish survival curves over different doses down to ppb levels in blood. This in vitro feeding assay for hard ticks is more advantageous than in vivotrials on animals.

Haute école de gestion de Genève

A constructive algorithm for realizing a distance matrix

Varone, Sacha

In: European Journal of Operational Research

The natural metric of a weighted graph is the length of the shortest paths between all pairs of vertices. The investigated problem consists in a representation of a given metric by a graph, such that the total length of the graph is minimized. For that purpose, we give a constructive algorithm based on a technique of reduction, fusion and deletion. We then show some results on a set of various...

Université de Neuchâtel

Biogeochemical changes during the Cenomanian-Turonian Oceanic Anoxic Event (OAE 2)

Mort, Haydon ; Adatte, Thierry (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1933.

Understanding how nutrients behave during sub-oxic environments is crucial in predicting future changes in the ocean-climate system. This study focuses on the role of phosphorus, in its different sedimentary reservoirs, during the Cenomanian-Turonian anoxic event (OAE 2), which occurred during the late Cretaceous (~93.5 Ma). In the geological record this period in the Earth’s history is...