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Articles by M.M. Haque
Total Records ( 3 ) for M.M. Haque
  S.K. Shaha , S. Dyuti , M.M. Haque and M.A. Maleque
  Fe-C-Al alloy system spheroidal graphite cast iron has enormous benefits such as higher strength and hardness, better wear and oxidation resistance etc. at room temperature as well as high temperature. However, its application is not still being popularized due to the production difficulties. In this investigation, a special type of design was developed to perform the magnesium (Mg) treatment in the melt. The raw materials were melted in an induction furnace and later liquid metal was treated using pure Mg foil for spherodization in special crucible. The microstructural study was performed using Scanning Electron Microscope (SEM). The chemical analysis shows a great breakthrough in Mg recovery of Fe-C-Al alloy system spheroidal graphite cast iron. It is also shown that the mechanical properties such as hardness, tensile strength and ductility are comparable to the previous research work.
  M.M. Haque , N.T. Narejo , M.A. Salam , S.M. Rahmatullah and M.A. Islam
  A four month long experiment was conducted in earthen ponds (each of 81 m2 in size) during the month from August to November, 2001 to observe suitable stocking density of Macrobrachium rosenbergii in polyculture of Indian major carps viz. catla (Catla catla), ruhu (Labeo rohita) and mrigal (Cirrhinus mrigala). Six densities of M. rosenbergii with carps were considered as treatments. Each treatment had three replications. All the fish were same age group and mean initial weight of prawn, catla, ruhu and mrigal were 1.1± 0.12, 14.2 ± 0.52, 8.5 ± 0.16 and 11.8 ± 0.20g respectively. Water quality parameters including temperature, dissolved oxygen and pH were found in the suitable range. The best combination of prawn-carp polyculture (prawn: catla: ruhu: mrigal = 25: 15: 15: 15) was found in the treatment T3 with significantly (p<0.05) highest growth of M. rosenbergii and carps.
  D.K. Biswas , M.M. Haque , A. Hamid and J.U. Ahmed
  Pot experiment was conducted to asses the temporal effects on gas exchange characteristics of blackgram at different growth stages. Two blackgram varieties namely BARImash 3 and BINAmash 1 were sown at 10 days interval on August 26, September 6, September 16 and September 26 of 1999. At each sowing time, photosynthetic gas exchange characteristics were measured at vegetative, flowering, pod filling, early maturity, mid maturity and late maturity stages of blackgram. Varietal difference was minimal but sowing time had profound effects on gas exchange characteristics of blackgram. Photosynthetic rate was higher in blackgram leaf sown on August 26 with its higher stomatal conductance, lower intercellular CO2 concentration and higher mesophyll conductance. The highest respiration rate was recorded at pod filling stage and fluctuated widely over the sowing times. Photosynthetic rate of blackgram decreased with delay in sowing times and the lowest rate was observed on September 26 sowing. Gas exchange characteristics were the highest at flowering stage of blackgram and declined gradually with the advent of plant age.
 
 
 
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