Dutch phytopathologists have shown that ethylene is vital for the protection of plants against bacteria and fungi. This is another function for the plant hormone already known to play a role in plant aging and fruit ripening.

Bart Geraats from Utrecht University demonstrated that plants which are insensitive for the hormone ethylene are hypersensitive to various microorganisms. The research implies that farmers and horticulturalists must be careful with substances that inhibit the effect of

Dutch chemists have visualised how the porous structure of a zeolite catalyst depends on the production method. Zeolite made with carbon fibres as a template, has particles with straight canals that act as highways for the oil components which must be converted into benzene components.

Zeolite is normally given a steam treatment to improve its catalytic properties. As a result of this the mineral acquires a more sponge-like structure. The canals formed ensure that the zeolite crystal become

Dutch researchers have developed a computer model that calculates the rate at which salt and moisture penetrate reinforced concrete. The model can be used for both the design of new concrete structures as well as analysing the lifespan of existing ones.

Sander Meijers from Delft University of Technology studied the relationship between moisture transport and salt penetration in concrete. Concrete structures such as bridges and dams are designed with as long a lifespan as possible. If these

Physicists and geoscientists join forces in a Dutch research centre.

Luminescence dating is a new technology for the determination of the age of sediments such as sand. At the Netherlands Centre for Luminescence Dating (NCL), physicists and geoscientists join forces to use and improve this new method. The foundation of the NCL will be celebrated on Thursday 20th of March in the form of an opening symposium in the auditorium of the TNO-NITG building in Utrecht. TU Delft will act as se

Lightning may be Mother Nature’s greatest show on Earth, but scientists now know it can produce significant amounts of ozone and other gases that affect air chemistry.

Researcher Renyi Zhang of Texas A&M University helped lead a study on the impact of lightning, and the results are surprising: Lightning can be responsible for as much as 90 percent of the nitrogen oxides in the summer and at the same time increase ozone levels as much as 30 percent in the free troposphere, the area that

In the developing brain, nerve cells make connections with one another by extending processes, often over long distances.

The growing tips of these nerve cell processes are guided to their ultimate connection sites by molecular cues in the environment.

A Salk Institute research team has discovered a receptor-protein interaction that guides nerve cells along specific pathways.

John Thomas, professor of molecular neurobiology, working on the fruit fly Drosophila, found tha