Most of the gasoline produced in Saudi Arabia is used as automobile fuel. It is produced in two grades, regular and premium, with no low-lead or non-leaded gasoline currently under production. The principal difference between the regular and premium gasoline is the antiknock performance. As high as 0.84 gm/liter of the octane enhancer, tetra ethyl lead (TEL) is added to the gasoline. This is considered high as compared with the rate used by other countries.

A novel "chopped fast flow" technique for surface reaction studies is described. It extends the molecular beam chopping approach to fast flow systems, exploits higher reactant and product fluxes, and permits transient rate measurements of fast surface reactions at much higher pressure. It employs an oscillating needle gas source to generate reactant square wave flows.

Development of the mite Varroa jacobsoni oud., in the Honeybee, Apis mellifera L.,in Michigan, USA, and a Comparison of Diagnostic Methods for Detection of the Mites

Determination of acaricide residues in Saudi Arabian honey and beeswax using solid phase extraction and gas chromatography