Ahmed Abdalla Hanafi

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Calcium phosphate ceramic materials are extensively used for bone replacement and regeneration in orthopedic, dental, and maxillofacial surgical applications. In order for these biomaterials to work effectively it is imperative that they undergo the process of degradation and resorption in vivo. This allows for the space to be created for the new bone(More)
The hitherto unknown 2-isopropyl-6,8-dibromo-4H-3,1-benzoxazin-4-one (2) was subjected to condensation with either primary or secondary amines affording the benzamide derivatives (3-7), while with alcohols in presence of the base, corresponding esters were obtained (8 and 9). Acylation of the hydrazide (12) or its cyclized form (13) gave (14-17). The(More)
Primary immunodeficiency diseases are rare hereditary conditions that usually occur at a young age; however, secondary immunodeficiency is acquired due to disease, drug treatment and is increasing in frequency among the population. Although periodontal diseases related to these conditions are secondary to other life threatening manifestations, they are very(More)
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