M.Phil.

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Study on Quality Changes of Fresh Water Prawn(Galda) in the Shrimp Change Value
(Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh., 2012-12) Chakrabortty, Anupam; Aziz, Prof. Dr. Md. Abdul
The present study was conducted to assess the quality loss of shrimp (Macrobracium rosenbergii) known as Galda in the value chain of Bagerhat region. The investigation was canied out in December 2011 to February 2012. The study was undertaken in twelve selected shrimp farms, four faria, four depot and five factory receiving point of different locations, viz. Fakirhat, Bagerhat Sadar, Mollahat and Sharankholla in Bagerhat region. Quality assessment included proximate analysis of Protein parameters and Biochemical {Total Volatile Base Nitrogen (TVB-N) and Trimethylamine Nitrogen (TMA)}. The TVB-N and TMA were determined by using Conway's Micro-diffusion Technique and Protein was determined by proximate analysis (kjeldhal method in wet way). Protein contents of forty eight samples were found in the range of 17.68% to 24.05% in wet weight method. At the farm level, the protein content was 23.17%, 23.80%, 23.01% and 23.16% in Fakirhat, Bagerhat Sadar, Mollahat and Sharankholla station in Bagerhat region respectively. At factory receiving point, protein content was 18.55%, 18.91%, 18.17% and 18.82% in Fakirhat, Bagerhat Sadar, Mollahat and Sharankholla station in Bagerhat region respectively. Protein loss of Shrimp was being 19.94%, 20.55%, 20.03% and 18.74% respectively in Fakirhat, Bagerhat Sadar, Mollahat and Sharankholla from farm to factory receiving point. From farm to factory receiving point, grand protein loss was 19.82%. The TVB-N value was found from 10.14 mg/100g to 19.54 mg/100g. The TMA value was found from 7.37 mg/l00g to 16.75 mg/100g. The results obtained from this research will help the shrimp's exporter to export good quality shrimps.
Study on Water pollution of Vairab River from Nowapara, Jessore to Labon Chara, Khulna
(Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh, 2014-05) Ahmed, Firoz; Aziz, Prof. Dr. Md. Abdul
only Vairab river is the vital source of water in Nowapara, Jessore to Khulna and is being polluted increasingly by effluents discharged from industries, municipal sewage, household wastes, linical wastes and oils. The purpose of this study is to investigate the impact of this wastewater on the river and thus to provide an updated report on the state of water quality of river Vairab. The water sample were collected from different areas in the river Vairab and analyzed for physico-chernical parameters and fresh water elements in the month of July, 2013 to November, 2013. The values of Temperature, turbidity, pH, chloride, hardness, DO, BUD, COD, Fe, As, Pb. Cd and Measured. During study period the temperature. turbidity,pH, hardness, chloride, DO, BUD and COD were found to be 28 Cr in the river °C to 31.5°C. 37 to 947 NTU, 7.2 to 8.01, 92 to 140 ppm, 9 to 34 ppm, 122 to 5.51 mg/L, 0.22 to 5.79 and 3.80 to 10.80 mg/L respectively. The concentration of Fe, Pb, As, Cd and Cr were found to be 0.10 to 2.60 ppm, 0.004 to 0.025 ppm, 0.001 to 0.004 ppm, 0.00015 to 0.0094 ppm and 0.001 to 0.006 ppm respectively. From the results of investigation, it was observed that the values of pH, Cl, hardness, As, Pb, Cd and Cr were within standard limit but the values of temperature, turbidity, DO, BUD, COD and Fe were not within acceptable limit as recommended by WHO and BDS guidelines. The results obtained from this investigation will help the people of the research area to be conscious for using the water in the Vairab river.
Synthesis and Characterization of Some Biologically Active Copper Complexes for Microbial Applications
(Khulna University of Engineering & Technology (KUET), Khulna, Bangladesh., 2015-06) Khan, Mohammed All Azom; Aziz, Prof. Dr. Md. Abdul
In this study, in order to verify our hypothesis amino acid base copper complexes have been prepared for biological application. Reaction of tcydan and Cu(C104)2 6H20 with nucleobases (adenine, hypoxanthine and theophylline) gave three tcydan—metal—amino-acid base complexes, Cu(tcydan)(ade)] .C104.2H20 (1), [{ Cu(tcydan) }2(hypoxanth).(CIO4)3 (2) and H20/CH3 [Cu(tcydan)(theophy)]3.(C104)3.2H20 (3). The complexes were prepared in H CN media at room temperature under pH 8-9. The crystal structures were determined by X-ray diffraction. In the structure of complex 1, the square-pyramidal Cu 2+ ion binds to an adenine ligand through the deprotonated N(9) and to four nitrogens of a tcydan ligand, and an interligand hydrogen bond is formed between the secondary amino nitrogen of tcydan and the ring nitrogen N(3) of the base. In complex 2, two square-pyramidal Cu2 ions bind to a xanthine ligand, one through N(7) with the formation of a hydrogen bond between the exocyclic oxygen 0(6) of the base and the secondary amino nitrogen of a tcydan ligand, and the other through the deprotonated N(9) with the formation of a hydrogen bond between N(3) of the base and the amino nitrogen of tcydan. In the structure of complex 3, the square-pyramidal Cu 2+ ion binds to a theophyllinato ligand through N(7) and four nitrogens of a tcydan ligand with the formation of a hydrogen bond between 0(6) of the base and amino group of tcydan, as observed in 2 and 3. In summary, the adenine complex 1 involves the metal-N(9) bonding with the formation of an N(3) hydrogen bond. On the other hand, the absence of the possible metal bonding to N(7) or N(I) of adenine might be due to a steric repulsion, intramolecular interligand N(tcydan)-H ...between amino groups of tcydan and the N(6) amino group when the metal ion binds to N(7)or N(l) of the base. Synthesized Cu-complexes are quite capable of removing Fecal coliform (FC) from water.