Obituary: Rifa‘at ‘Ali Abou-El-Haj

Abou-Elhamd: Cholesterol granuloma

Cholesterol granuloma is a pathological lesion affecting the mastoid air cells due to partial obstruction of its aireation. It is commonly unilateral. It is usually associated with glue ear with intact ossicles. Histologically, it is characterized by the presence of large pointed crystals and giant cells. Its treatment is either conservative steroid therapy or surgical removal of the granuloma ...

484-497 Abou-donia Aug03

Organophosphorus compounds are potent neurotoxic chemicals that are widely used in medicine, industry, and agriculture. The neurotoxicity of these chemicals has been documented in accidental human poisoning, epidemiological studies, and animal models. Organophosphorus compounds have 3 distinct neurotoxic actions. The primary action is the irreversible inhibition of acetylcholinesterase, resulti...

Obituary

The Complexity of the Haj

The Hajj os Calculus is a simple, nondeterministic procedure which generates the class of non-3-colorable graphs. Mansseld and Welsch MW] posed the question of whether there exist graphs which require exponential-sized Hajj os constructions. Unless NP 6 = coNP, there must exist graphs which require exponential-sized constructions, but to date, little progress has been made on this question, des...

Obituary Notice

Mrs. Meiklejohn, of St. Paul's, Upper Maze M, Ston January 29th. Her life was spent for the weitare ? many parents could testify to the devotion w i ^ defective children, and She was the first to realise the special _n country. For many years she she opened the first home for such children in defective children, and of was the Principal of this home, and of a home 10 wQmen> another home for dif...