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Articles by A.M.A. Ahmed
Total Records ( 2 ) for A.M.A. Ahmed
  A. Mannan , J. Kawser , A.M.A. Ahmed , Mohd. Omar Faruk Sikder , M.J. Islam and M.A. Chowdhury
  Beta thalassemia is an inherited autosomal recessive blood disease. In beta thalassemia and hemoglobinopathies, the genetic defect which could be either mutations or deletion results in reduced rate of synthesis or no synthesis of one of the globin chains that make up haemoglobin. Reduced synthesis or no synthesis of one of the globin chains can cause the formation of abnormal haemoglobin molecules, thus causing anemia, the characteristic presenting symptom of the thalassemia. The present study was undertaken with objective to study the occurrence and socio-demographic profile of hemoglobinopathies cases of Chittagong city. It may provide accurate data of population frequency that are necessary for the planning of control thalassemia in the highly populated eastern part of Bangladesh. This is a hospital record based prospected study that was carried out in two different General hospitals in Chittagong town where both hospitalized as well as out patients were included. The study was carried out from November 2011 to April 2012. A total of 485 suspected patients who were admitted in the hospitals were included in this study. Data was collected and then studied and analyzed properly. Analysis was done by employing Statistical Package for Social Science (SPSS Version 10.0) software package. Here the difference of male and female patients was found statistically insignificant (p>0.05). It was observed that, the onset of hemoglobinopathies was significantly high at neonatal to childhood period <1-10 years and the percentage was 51.70% (p<0.05). Here, the prevalence of HBE β Thalassemia patients (38.65%) was found the highest in percentage.
  L. Khaleda , A.M.A. Ahmed , L.W. Marzan and M. Al-Forkan
  The experiment was conducted to identify the in vitro responsiveness for callus induction along with plant regeneration of deepwater rice in the presence of NaCl. In this study, callus induction and plant regeneration responsiveness were tested using different concentrations of 0.1-0.3% (w/v) NaCl which added in MS and LS based media. Marked variation was observed both in calli proliferation and plant regeneration among the six deepwater rice cultivars. In the presence of 0.1% (w/v) NaCl, the highest number of callus induction in all genotypes recorded on the media supplemented with 2 mg L-1 2,4-D + 0.1% (w/v) NaCl. The highest dose of NaCl salt 0.3% (w/v) inhibited callus induction compared to 0.1 and 0.2% NaCl media combinations. Among the cultivars tested, cv. Murabajal produced the highest percentage (39%) of callus whilst cvs. Gheoch (23%) and BR224-2B-2-5 (8%) responded poorly in terms of callus production on the MS based 0.1% NaCl supplemented medium. NaCl had no clear promotive effect on regeneration percentage. In this study, green plant did not regenerate from cv. HA-8. Salinity strongly reduced regenerating capacities of callus obtained from all the cultivars. The mean number of shoots produced per regenerating calli was gradually decreased in all the cultivars when the concentration of NaCl increased in the medium. The apparent tolerance of NaCl in these deepwater rice cultivars may be at least partially related to its growth rate since it can dilute the contents of ion in the shoot. The results of the present study showed the decreasing trend in callus proliferation and plant regeneration with the increasing concentrations of NaCl.
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