Metal oxide semi-conductor gas sensors in environmental monitoring.

Metal oxide semiconductor gas sensors are utilised in a variety of different roles and industries. They are relatively inexpensive compared to other sensing technologies, robust, lightweight, long lasting and benefit from high material sensitivity and quick response times. They have been used extensively to measure and monitor trace amounts of environmentally important gases such as carbon monoxide and nitrogen dioxide.

Diagnosis of sickle-cell disease by DNA analysis in Nigeria.

Objective: To compare genotyping of leucocyte DNA by PCR and Dde I with the conventional genotyping of haemoglobin of the same subject.

Design: Comparative study.

Subjects: 25 adults, 16 males and nine females.