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Biomedical subjects

A A Al-Taweel

Publications and source records attributed to A A Al-Taweel.

3 recordsLinked to original sources

Hypertension among attendants of primary health care centers in Al-Qassim region, Saudi Arabia.

OBJECTIVE: The aims of the present work were to determine the prevalence of hypertension among attendants of primary health care centers in Al-Qassim region, Kingdom of Saudi Arabia. Also to investigate sociodemographic associates, and assess awareness among hypertensives. METHODS: Through cluster sampling 30 primary health care centers were selected. Forty attendants were chosen randomly from each center. A questionnaire inquiring sociodemographic characteristics and awareness was completed by interview with each participant. Using standardized methods the blood pressure, height and weight were measured. RESULTS: The study sample amounted to 1114 persons, 338 (30%) were hypertensives (blood pressure >140/90), 24% stage 1, 4% stage 2 and 2.5% stage 3. The prevalence increased with age. It was higher in males (33%), single persons (44%), illiterate (33%), merchants (45%) and obese persons (35%). Age above 40 years, illiteracy, overweight and obesity were independently associated with hypertension with statistically significant value. Less than one 4th (23%) of hypertensives were aware of their hypertension. CONCLUSION: Hypertension is a major public health problem. A routine measurement of blood pressure of all attendants of primary health care centers with periodic examination of those aged more than 40 years particularly overweight and obese persons should be implemented.

Adult↗

Enzyme polymorphism in Drosophila melanogaster populations in Iraq.

Electrophoretic studies of the degree and pattern of polymorphism at two third-chromosome loci, esterase-6 (Est-6) and phosphoglucomutase (PGM), were carried out in three Drosophila melanogaster populations collected from different localities in Iraq: Mosul, Tuwaitha, and Basrah. The results show that only the Tuwaitha population was polymorphic for both loci; the other two populations were polymorphic for Est-6 and monomorphic for PGM. The allele frequency changes at both loci were followed for 20 generations in an experimental cage derived from the Tuwaitha population; it was found that there is a deviation from Hardy-Weinberg equilibrium at both loci toward the homozygote.

Animals↗

Gamma-rays kill grasshopper primary spermatocytes in groups.

Primary spermatocyte killing by gamma-rays was studied in the grasshopper Heteracris littoralis in which spermatogenic development occurs in cysts containing a maximum of 64 cells during the first meiotic division. Cell killing at this stage is not random and mainly involves the death of whole cysts. The dose-response curve for cell killing has complex kinetics with at least two components but lacks any shoulder at low doses, thus indicating no repair of the lethal damage. Cell loss is apparent from surviving cysts as early as 45 min post irradiation but loss of greater than 24 cells is incompatible with cyst survival. Loss of fewer than 24 cells also is not random since certain values for cell loss are frequently observed while other, interspersed values are not seen at all.

Animals↗