Tannery wastewater contains large amount of chemical compounds including toxic substances. So an attempt was made to characterize physiochemical parameters of tannery wastewater and investigate the efficacy, and applicability of the biological treatment utilizing aquatic plants macrophytes and algae. Total suspended solids TSS and total Dissolved solid in the original wastewater were found 1250 mg/l and 21300 mg/l respectively. The pH and temperature were 8.3 and 29°C. Dissolved Oxygen (DO), Biological Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) were 2.72 mg/l, 4464 mg/l and 12840 mg/l respectively. Electrical conductivity (EC) was 42500 ?S/cm anions PO43- and Cl- were 17.1 mg/l and 13.8 mg/l respectively. Heavy metals were also analysed. Fe, Na, Zn, Cr, Pb and Ca were found 14.675 mg/l, 12006 mg/l, 1.5241 mg/l, 10.348 mg/l, 0.1818 mg/l and 0.4112 mg/l respectively. Biological treatment with aquatic plants, algae and their combination treatments were found to be effective for the reduction of some physiochemical parameters. Treatment conducted with Eichhornia crassipes was found most effective in reducing COD, EC, TDS and TSS. Mixed treatment resulted reduction of pH from 8.3 to 6.21. Both macrophytes and algae exhibited good heavy metal uptake tendency, but Eichhornia crassips was identified as most effective for the removal of heavy metals in the wastewater because of its extensive root system which provides to help the uptake of pollutants from the wastewater. DOI: http://dx.doi.org/10.3329/bjsir.v49i4.22626 Bangladesh J. Sci. Ind. Res. 49(4), 233-242, 2014

An experiment was conducted in field condition to study the effect of nitrogen-phosphorus fertilization on growth, yield and nutrient content of cabbage. The experiment was laid out in randomize block design with three replications. The yield and yield components were maximized by N3P2 fertilizer treatment. Nutrient content of cabbage varied with fertilizer treatment. The maximum amount of reducing sugar, ascorbic acid, phosphorus were found at the highest rate of N - P fertilization whereas accumulation of titrable acidity, iron, calcium were maximum at the rate of N2P2 treatment. However pH, ash content were more or less same throughout the experiment. Bangladesh J. Sci. Ind. Res. 41(1-2), 41-46, 2006

Spirulina containing high concentration of functional nutrients is emerging as an important therapeutic food. So the present study was designed to evaluate the hypoglycaemic properties of Spirulina platensis on long-evans rats. Two sets of experiment were conducted, the 1st set was compared with the effect of Spirulina platensis, glibenclamide, glucose and water after feeding 60 minutes. Glibenclamide was used as a standard reference drug. The findings clearly indicated that the oral administration of Spirulina platensis (150mg/kg b.w) significantly tended to reduce blood glucose level of rat than that of glibenclamide. In the 2nd experiment long-term hypoglycaemic effect of Spirulina platensis 0.5% and 2.5% fed with high fat high sugar containing diet and 150mg/kg b.w with normal laboratory diet was also observed. The 2nd findings also indicated that the blood glucose level was significantly decreased in both the diet when supplemented with Spirulina platensis. Key words: Diabetic mellitus; High fat diet; Hypoglycaemic; Spirulina platensis; Body weight DOI: 10.3329/bjsir.v45i2.5715Bangladesh J. Sci. Ind. Res. 45(2), 163-168, 2010

Growth response of Spirulina platensis (Nordst) Geitler in cabbage skin extract media and their antibacterial activities were studied. Five different concentrations e.g. 10 , 8 ,6 , 4 and 2 gm/L of cabbage skin extract media and one BD1 (control) medium were used in this experiment. Highest optical density was observed in 10 gm/L cabbage skin extract medium (0.35) followed by BD1 medium (0.30) after fifteen days of culture. Antibacterial activity of S. platensis was studied. Only freeze dried S. platensis powder extracts showed inhibitory effect against tested bacterial pathogen. DOI: http://dx.doi.org/10.3329/bjsir.v49i4.22622 Bangladesh J. Sci. Ind. Res. 49(4), 205-210, 2014

Large scale Spirulina culture is possible in Bangladesh inspite of unpredictable climatic condition. Effect of different culture media on the growth of a local strain of Spirulina (Spirulina platensis) was studied. Bangladesh medium (Bd1) was found to be more favourable for the growth of the alga. All together three culture media were included in this study. Bangladesh J. Sci. Ind. Res. 41(3-4), 227-234, 2006