DSpace at King Saud University

Ligational behavior of a tridentate NOS donor ligand towards transition metal ions

Mon, 01 Jan 1996 00:00:00 GMT

Title: Ligational behavior of a tridentate NOS donor ligand towards transition metal ions

Authors: Monshi, Mahmoud A.S.; Abdel-Salam, Naser M.

Abstract: The reaction of a Schiff base (formed by the condensation of S-benzyl dithiocarbazate with benzoin [HBBTC]) with some bivalent metal ions give mono-ligand complexes having general formula M [BBTC]X., nH20 where [M= C02+, Cu2+, Ni2+, Pd2+, Pt2+, and Hg2+; X=Ac or Cl and n =0-2]. Elemental analysis, magnetic susceptibility and spectral (Ir, Dv-vis and NMR) measurements have been used to characterize the complexes and suggest their structures. Ir data show that the ligand behaves as mononegative tridentate.

Secure Identification System-SIS

Title: Secure Identification System-SIS

Authors: Rahal, Dr. Salah M.; Abu Samah, Hatim A.; Muteb, Khaled N.

Abstract: The secure identification of a person was and still of great interest in differentfields of human activities. The traditional identification methods such as PIN,passwords aren’t capable to achieve a high level of secure identification. In thecontrast, the biometrics allows to attain the suitable solution for this vital question.Different types of biometrics are reviewed. Its characteristics are unique for eachperson either for physiological or behavioral biometrics. It is shown that thefingerprint recognition has a very good balance of all desirable properties.The design of secure identification fingerprint-based system, in its hardware andsoftware parts, is done. This system was implemented with the suitable features.

Cutaneous facial sinus tract of dental origin: a clinical case report

Mon, 01 Jan 2001 00:00:00 GMT

Title: Cutaneous facial sinus tract of dental origin: a clinical case report

Authors: Assery, Mansour; Shamranit, Saleh Al

Abstract: A cutaneous sinus tract of dental origin isrelatively uncommon and may be misdiagnosedeasily. As specific dental symptoms are usuallyabsent in such cases, patients typically first visit aphysician for evaluation and treatment. Thesesinus tracts are most commonly found on the chinor in the submandibular area. However, all chronicdraining sinus tracts of the face or neck shouldsignal the need for thorough dental evaluation.1A review of the literature reveals that thesepatients sometimes undergo multiple surgicalexcisions and biopsies before it is recognized that the origin of the sinus tract is the extension of pulp disease into the periradicular area. Systemic antibiotic therapy may be tried, but at best, this will only result in temporary cessation or diminution of the drainage, which will return after conclusion of the antibiotic therapy because the cause persists.

Cytogenetic activities of fusarium spp. metabolites on A. cepa

Sun, 01 Jan 1995 00:00:00 GMT

Title: Cytogenetic activities of fusarium spp. metabolites on A. cepa

Authors: Soliman, M.S.A.; Badran, R.A.M.

Abstract: The effect of four mycotoxins on the chromosomal arrangement during mitotic cell division of Allium cepa was examined. Results indicate the presence of certain changes in mitotic stages index (M.S.I) as well as some chromosomal anomalies which reflect toxic activity due to the exposure of the tested bulbs to the four fungal species. F. equiseti gave the highest deviation of chromosomal index from the normal chromosome behaviour followed by F. solani, F. moniliforum and F. culmorum.