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Papers by El Arbi Arbi Sghaier

Research paper thumbnail of Recent studies on the chemistry and biological activities of the organosulfur compounds of garlic (allium sativum

Garlic, Allium sativum, is known to contain a wide range of biologically active compounds. The or... more Garlic, Allium sativum, is known to contain a wide range of biologically active compounds. The organosulfor compounds are mainly the biologically active components of garlic. Many health benefits has been ascribed to them, possessing biological activities including antibacterial, antifungal, antiatherosclerotic, antihypertensive, lipid and cholesterol lowering effects, inhibition of carcinogenesis, enhancing the immune system and other biological activities. The chemistry of the organosulfiir compounds in garlic varies with the method it has been processed. For example, the composition of 3ie organosulfiir compounds change when garlic is cooked, crushed, ingested, or powdered. This review summarizes the composition of these compounds in garlic's different forms and discusses the recent studies on the biological activities of the organosulfiir compounds of garlic from 1996-January 1998, with special attention to the role of these compoimds in preventing cancer. Garlic, in any of its forms, would be effective to the human body in spite of the differences in the chemical composition in each form. It is shown in this review that the water soluble S-alkyl cysteines, the thiosulfinates, ajoenes and vinyl dithiins, and the oil soluble allyl sulfides, which are found in the different forms of garlic, possess the biological activities known for garlic. It is therefore advisable to consider including garlic in our daily diets to benefit from its effects, especially in cancer prevention.

Research paper thumbnail of An increase in prevalence of diabetes mellitus in Jordan over 10 years

Journal of Diabetes and Its Complications, 2008

Background: The prevalence of the metabolic syndrome is rapidly increasing with a considerable et... more Background: The prevalence of the metabolic syndrome is rapidly increasing with a considerable ethnic variation within and across populations. This study was conducted to estimate the prevalence of the metabolic syndrome and its individual components using Adult Treatment Panel III (ATP III) criteria among Northern Jordanians. Methods: Data were analyzed from a cross-sectional study that included a random sample of 1121 northern Jordanians aged 25 years and above. The metabolic syndrome was defined by ATP III criteria. Results: The age-adjusted prevalence of the metabolic syndrome was 36.3% (95% CI 33.6-39.0%) (28.7% among men and 40.9% among women). The prevalence increased significantly with age in men and women. The prevalence of the metabolic syndrome was significantly higher in women than in men in age groups of 40 -49 and 60 years and above. Low HDL cholesterol was the most common abnormality in men (62.7%), and abdominal obesity was the most common abnormality in women (69.1%). Conclusions: Prevalence of the metabolic syndrome in North Jordan is considerably higher than in developed countries and other Arab populations. An integrated approach is needed for the prevention and treatment of the metabolic syndrome. D

Research paper thumbnail of Position estimation in a true asymmetric cascade H-bridge multilevel inverter

This paper introduces a new method to track the saliency of motor fed by a multilevel inverter th... more This paper introduces a new method to track the saliency of motor fed by a multilevel inverter through measuring the dynamic current response of the motor line currents due the IGBT switching actions. The method uses only the fundamental PWM waveform (i.e there is no modification to the operation of the multilevel inverter) similar to the fundamental PWM method proposed for a 2-level inverter. Simulation results are provided to demonstrate the performance of the complete sensorless speed control of a PM motor driven by such a converter over a wide speed range. Finally the paper introduces a comparison between the 2-level inverter and the multilevel inverter in terms of the reduction of the Total Harmonic Distortion (THD) using the fundamental PWM method in both cases.

Research paper thumbnail of Recent studies on the chemistry and biological activities of the organosulfur compounds of garlic (allium sativum

Garlic, Allium sativum, is known to contain a wide range of biologically active compounds. The or... more Garlic, Allium sativum, is known to contain a wide range of biologically active compounds. The organosulfor compounds are mainly the biologically active components of garlic. Many health benefits has been ascribed to them, possessing biological activities including antibacterial, antifungal, antiatherosclerotic, antihypertensive, lipid and cholesterol lowering effects, inhibition of carcinogenesis, enhancing the immune system and other biological activities. The chemistry of the organosulfiir compounds in garlic varies with the method it has been processed. For example, the composition of 3ie organosulfiir compounds change when garlic is cooked, crushed, ingested, or powdered. This review summarizes the composition of these compounds in garlic's different forms and discusses the recent studies on the biological activities of the organosulfiir compounds of garlic from 1996-January 1998, with special attention to the role of these compoimds in preventing cancer. Garlic, in any of its forms, would be effective to the human body in spite of the differences in the chemical composition in each form. It is shown in this review that the water soluble S-alkyl cysteines, the thiosulfinates, ajoenes and vinyl dithiins, and the oil soluble allyl sulfides, which are found in the different forms of garlic, possess the biological activities known for garlic. It is therefore advisable to consider including garlic in our daily diets to benefit from its effects, especially in cancer prevention.

Research paper thumbnail of An increase in prevalence of diabetes mellitus in Jordan over 10 years

Journal of Diabetes and Its Complications, 2008

Background: The prevalence of the metabolic syndrome is rapidly increasing with a considerable et... more Background: The prevalence of the metabolic syndrome is rapidly increasing with a considerable ethnic variation within and across populations. This study was conducted to estimate the prevalence of the metabolic syndrome and its individual components using Adult Treatment Panel III (ATP III) criteria among Northern Jordanians. Methods: Data were analyzed from a cross-sectional study that included a random sample of 1121 northern Jordanians aged 25 years and above. The metabolic syndrome was defined by ATP III criteria. Results: The age-adjusted prevalence of the metabolic syndrome was 36.3% (95% CI 33.6-39.0%) (28.7% among men and 40.9% among women). The prevalence increased significantly with age in men and women. The prevalence of the metabolic syndrome was significantly higher in women than in men in age groups of 40 -49 and 60 years and above. Low HDL cholesterol was the most common abnormality in men (62.7%), and abdominal obesity was the most common abnormality in women (69.1%). Conclusions: Prevalence of the metabolic syndrome in North Jordan is considerably higher than in developed countries and other Arab populations. An integrated approach is needed for the prevention and treatment of the metabolic syndrome. D

Research paper thumbnail of Position estimation in a true asymmetric cascade H-bridge multilevel inverter

This paper introduces a new method to track the saliency of motor fed by a multilevel inverter th... more This paper introduces a new method to track the saliency of motor fed by a multilevel inverter through measuring the dynamic current response of the motor line currents due the IGBT switching actions. The method uses only the fundamental PWM waveform (i.e there is no modification to the operation of the multilevel inverter) similar to the fundamental PWM method proposed for a 2-level inverter. Simulation results are provided to demonstrate the performance of the complete sensorless speed control of a PM motor driven by such a converter over a wide speed range. Finally the paper introduces a comparison between the 2-level inverter and the multilevel inverter in terms of the reduction of the Total Harmonic Distortion (THD) using the fundamental PWM method in both cases.