Mohamed A. Yassin

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Lactose has been hydrolyzed using covalently immobilized beta-galactosidase on thermally stable carrageenan coated with chitosan (hydrogel). The hydrogel's mode of interaction was proven by Fourier transform infrared spectroscopy, differential scanning calorimetry (DSC), and Schiff's base formation. The DSC thermogram proved the formation of a strong(More)
In recent years, the issue of osteopenia/osteoporosis in children, adolescents and young adults with thalassaemia major (TM) has attracted much attention because it is a prominent cause of morbidity despite adequate transfusion and iron chelation therapy. The reported frequency of osteoporosis, even in well treated TM patients varies from 13.6% to 50% with(More)
This paper discusses the importance of culture collections in plant pathology and reviews the methods currently available to store cultures. The preservation and maintenance of plant pathogenic fungi in a viable yet stable state for long periods has always been important, because isolates of these fungi can serve as standards for identification of(More)
Thalassaemia is one of the most common genetic disorders caused by a reduction of the globin chains leading to chronic haemolytic anaemia from birth. The mainstay of treatment is blood transfusion to maintain adequate levels of the haemoglobin. Iron overload in β-thalassaemia major patients is secondary to multiple blood transfusions and increased iron(More)
A study was conducted to describe the clinical presentation, epidemiology and outcome of imported malaria in patients admitted to Hamad Medical Corporation, Qatar, between 1st January and 31st December 2005. During a one-year study, 81 patients [64 (79%) males and 17 (21%) females] were studied. The median age was 26 years. Most infections were caused by(More)
Viral retinitis due to cytomegalovirus (CMV) infection is rare in patients with acute leukemia who did not receive hematopoietic stem cell transplantation. We report a case of CMV retinitis that developed in a 49-year-old patient with acute lymphoblastic leukemia. The patient was treated with salvage chemotherapy using a hyper-CVAD regimen and did not(More)
Continuous glucose monitoring (CGM) systems are an emerging technology that allows frequent glucose measurements to monitor glucose trends in real time. Their use as a diagnostic tool is still developing and appears to be promising. Combining intermittent glucose self-monitoring (SGM) and CGM combines the benefits of both. Significant improvement in the(More)
INTRODUCTION Primary hypothyroidism is one of the most frequent complications observed in-patients suffering from thalassemia. We investigated and reviewed the thyroid function in all thalassemic patients attending the Pediatric Endocrine Clinic of Hamad Medical Center, Doha, Qatar during the last 10 years of follow-up. PATIENTS AND METHODS A total of 48(More)
AIM OF THE STUDY To evaluate semen parameters and to assess serum FSH, LH, Testosterone (T) concentrations before and 12 weeks after intravenous iron therapy (800-1200 mg elemental iron therapy - IVI) in adults with iron-deficiency anemia (IDA). MATERIALS AND METHODS We studied 11 eugonadal adults with IDA, aged 40 ± 5 years, due to defective intake of(More)
The classic clinical manifestations of Klinefelter syndrome (KS) are expressions of the primary hypogonadism that causes severe alterations of the reproductive and endocrine functions of the testis. It is a syndrome that causes infertility, and in addition leads to multiple disorders that involve a variety of tissues and organs. Important medical conditions(More)