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INTERNAL DEFECTS AND WATER amount of water absorption was observed in
ABSORPTION BEHAVIOR OF SINGLE both HC and its composite.
LAYER ITALIAN TILES USING NEUTRON 039 BEGUM, N.; HYDER, M.I.; KABIR,
RADIOGRAPHY FACILITY OF 3 MW S.E.; MOLLAH, M.M.; (Dept. of Chemistry,
TRIGA MARK II RESEARCH REACTOR. Jahangirnagir University, Savar, Dhaka) &
J. Bang. Acad. Sci., 2007, 31 (2), 213-222. HOSSAIN, G.M.G. (Dept. of Chemistry,
Cardiff. University, Cardiff, U.K). REACTION OF
Neutron radiography (NR) technique has been [Os 3(CO) 11(MeCN)] WITH INDOLE: X-RAY
adopted to study internal defects and water STRUCTURE OF [Os 3(CO) 11(η1-NC 8H 7)]. J.
absorption behavior of building materials, like Bang. Acad. Sci., 2006, 30 (1), 47-53.
single layer Italian tiles obtained from Concord
Real Estate & Building Products, Unit II, Salna, The reaction of [H 7 (CO) 11(MeCN)] with indole at
Gazipur, Bangladesh. Measurements of optical room temperature gave [Os 3(CO) 11 (η -NC 8H 7)] 1
1
density differences between the film in 20% yield. Compound 1 has been characterized
background and radiographic images of the by elemental analysis, infrared and mass
dry/wet samples were used for investigation of spectroscopic data together with single crystal X-
the present work. Little variation in optical ray crystallography. It crystallizes in the triclinic
density values of the radiographic image was space group PĪ with a = 8.9731(12), b = 10.009(2),
observed. The rate of water absorption of the c = 12.670(2)Å , α = 101.99(2), β= 94.07(2), γ=
tiles decreases with increase of water 100.87(2)°, Z = 2 and V = 1085.9(3) Å . This
3
absorption time. No internal defect could be compound consists of an approximate isosceles
found in the tiles through the investigation of triangle of osmium atoms in which the indole
radiographic image and subsequently analyzing ligand is coordinated through the imino nitrogen
the line profiles at different levels (including atom and occupies an axial coordination site on
center position) of it. Thus elemental Os(3).
distributions of the tiles are found to be almost
homogeneous. 040 FAKHRUDDIN, A.N.M. (Dept. of
Environmental Sciences, Jahangirnagar
038 ALAM M.K. & KHAN, M.A.
(Institute of Nuclear Science & Technology, University, Savar, Dhaka) & RASHID, H.
(Institute of Food & Radiation Biology, Atomic
BAEC, Dhaka). STUDY OF WATER
ABSORPTION AND INTERNAL DEFECTS IN Energy Research Establishment, Ganakbari,
JUTE REINFORCED BIOPOL COMPOSITE Savar, Dhaka). MICROBIOLOGICAL QUALITY
USING DIGITAL NEUTRON RADIOGRAPHY OF CONVENIENCE SNAKE FOODS SOLD IN
TECHNIQUE. J. Bang. Acad. Sci., 2006, 30 (1), THE MARKET. J. Bang. Acad. Sci., 2007, 31 (1),
29-37. 1-6.
Water absorption behavior and internal defects Microbiological status of a kind of snack food
of jute reinforced Biopol® composites were consisting mainly of cooked pea, potato, egg,
studied by adopting CCD camera based digital tamarind water etc, mixed with spices sold in
neutron radiography (NR) technique. The Dhaka city by the way-side shops was investigated.
surface of jute (HC) was pretreated with 2- Total aerobic bacterial count of snack was 3.7 ×
4
7
hydroxyethyl methacrylate (HEMA) before I0 /g, and contained 1.8 × 10 /g coliform, 2.5 ×
2
2
composite fabrication. Some internal defects 10 /g fecal coliform, 4.4 × 10 /g staphylococci and
2
(very small voids or cavity) were observed 4.0 × 10 /g fungi. Raw spices (onion and green
within the composites by analyzing the neutron chilli) were the most potential sources of
radiographic images. Nevertheless, the contamination. Utensil washing water was heavily
dispersion of polymer (Biopol) in the composite contaminated with spoilage and pathogenic
was observed homogeneous. From the neutron microbes. Major bacterial contaminants were
transmission profile measurements, negligible Staphylococcus aureus, Pseudomonas, Bacillus
cereus, Bacillus subtilis, Klebsiella, Escherichia
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