Jute is highly flammable in character. Due to its high degree of flammability, the versatile use of this fibre is handicapped to some extent, particularly in some specific purpose where jute products with flame resistance finishes and demanded. Considering this disadvantage, a research project was undertaken to make this fibre flameproof and therefore safer in specialized textile uses. The study was performed using yarn and fabrics which were desized with diastase and lissapol-N. Yarn and fabrics were scoured with sodium carbonate, sodium hydroxide under some standard conditions. These pretreated yarns and fabrics were used in the whole experimental work. The treated yarns were tested for flame retardant by subjecting them to the luminous flame of Bunsen burner and by observing the time of flaming (after flame) and time of glowing (flameless combustion, after glow), if any Percentage losses of strength of the treated yarn and fabrics were also measured by standard method. Different solutions of fire resistant chemicals were prepared to change the chemical, concentration and pH ratio of the solution. Jute fabrics and yarns treated with 65% solution of urea and ammonium dihydrogen phosphate (the ratio of urea and ADP being 3:2) together with 2% Turpex NP and 3-6% perapret PE-40% were found durably flame retardant causing minimum loss of the strength. This research was focused on fire resistant treatment of jute yarn and fabrics with different chemicals to make jute products for diversified textile uses.

As the allocated forestland for pulp and paper production in Bangladesh is very limited and a substantial amount of crops residues are generated each year, the latter can substitute for pulp and paper production. In this context, eight residues of crops produced in Bangladesh were evaluated. Final pulp yields were 40 -65% with the kappa number of 11-32% depending on crops residues. The experimental processes are outlined. The physico-mechanical properties of handmade papers are estimated by standard procedure. Gram per Square Metre (GSM), brightness percentage, thickness and tearing strength of different handmade paper sheets shows acceptable papermaking properties. FT-IR analysis were carried out for identifying types of chemicals bonds (functional groups).The study indicates that these hand-made papers can be used for making eco-friendly paper bags, packaging material which will be suitable alternative to the non-biodegradable plastic, a cause of ecological and environmental pollution.

In this research article, Cobalt nanoparticles were green synthesized, Characterized and applied in antimicrobial study of some selected pathogens. The formation of cobalt nanoparticles was confirmed by first, its colour change from light brown to dark brown within 10 minutes. From the UV-Vis spectral analysis, it was observed that highest absorption peak appeared at 400nm reflecting the surface Plasmon resonance of Cobalt NPs from Parkia biglobosa stem which is characteristic of Cobalt Nanoparticles. From the FT-IR studies, the absorption peaks were seen at 3787.71 cm-1, 3660.31 cm-1, 3436.44 cm-1, 1638.75 cm-1, 1384.50 cm-1, 1090.80 cm-1and 798 cm-1. Investigation revealed a medium sharp peak absorption at 1090.80 cm-1which may be attributed to the stretching of aliphatic hydrocarbon (C–H). A peak at 1384.50 cm-1corresponds to C=C stretching while the absorption bands at 1638.75 cm-1and 3436.44 cm-1may be assigned to N-H and O-H stretching vibration modes respectively. Similarly, peaks were seen at 3787.71 cm-1 and 3660.31 cm-1 corresponding to O-H belonging to water and alcohol respectively. Furthermore, the very strong band at 798 cm-1emanates from C-O-C symmetric stretching and C-O-H bending vibrations of protein in the Cobalt nanoparticles. The surface morphology of the bio fabricated Cobalt nanoparticles, has revealed by SEM image, is spherical in shape having smooth surface and well dispersed with close compact arrangement. From the microbial study carried out, the surfaces of the cobalt nanoparticles might have interacted directly with the bacterial outer membrane, causing the membrane to rupture thereby killing the microbes. The antibacterial activity demonstrated by the cobalt nanoparticles in this study could be attributed to their small size and high surface to volume ratio, which therefore enables them to interact closely with bacterial membranes. From the minimum inhibitory concentration (MIC) study conducted, it showed clearly that the green synthesized cobalt nanoparticles inhibited the growth of the pathogens investigated.