http://nopr.niscair.res.in/handle/123456789/963 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1171 Title: Biocide injection as a means of internal corrosion control of oil pipelines <br/> <br/>Authors: Aloko, D F; Mohammed, A D <br/> <br/>Abstract: This research work is aimed at investigating the effect of biocide injection in the treatment of internal corrosion of oil pipelines. In this research, carefully formulated laboratory experiments are performed on a sample of sump tank discharge from Mobil Producing Nigeria (MPN) offshore facilities using formaldehyde (methanol) as the biocide. This is to assess its effect on bacterial proliferation as well as hydrogen sulphide (H₂S) formation, under both aerobic and anaerobic conditions. The result from the turbidity observed in untreated cultures showed that bacterial growth had occurred in them and such growth must have been hindered by the formaldehyde in the treated aerobic and anaerobic cultures. A blackening of lead acetate paper observed with emanating rotten egg smell gas is an indication for the formation of hydrogen sulphide gas. Biocide (formaldehyde) has proved to be efficient at combating bacterial growth and hydrogen sulphide production by the bacteria. These results show that biocide can be used to prevent internal corrosion of oil pipeline since it inhibits hydrogen sulphide formation from metabolism of the bacteria. <br/> <br/>Page(s): 536-538 http://nopr.niscair.res.in/handle/123456789/1170 Title: A study of structure and properties of lightly cross-linked polyethylene, crystallized from the melt under uniaxially stretching <br/> <br/>Authors: Acharya, B B; Mohanty, S; Roy, G S <br/> <br/>Abstract: A lightly crosslinked sample when stretched in a molten state, transformation to crystalline state first takes place from the stretched molecular chains. It is observed that this mode of crys-tallization produces a very unique phase structure associated with many characteristic properties which are advantageous for practi-cal use. <br/> <br/>Page(s): 532-535 http://nopr.niscair.res.in/handle/123456789/1169 Title: Synthesis, characterization and thermal studies of boron containing phenolic and cardanolic polymers <br/> <br/>Authors: Antony, Rosy; Pillai, C K S <br/> <br/>Abstract: Boron containing phenolic and cardanolic polymers were synthesized by transesterification and further polymerization with hexamethylenetetramine. Flammability and thermal stability of these polymers were evaluated by LOI and TGA, respectively, and compared with those of conventional phenol-formaldehyde and cardanol-formaldehyde resins. The polymers showed better flame retardancy and high thermal stability. The borate esters enhance the char formation decomposition reactions with the retention of the boric oxide surface coating during high temperature exposure of the phenolic mass and thus impart flame retardancy and thermal stability. <br/> <br/>Page(s): 529-531 http://nopr.niscair.res.in/handle/123456789/1168 Title: Bioinorganic studies on Fe (II)- zidovudine (azt) complex <br/> <br/>Authors: Das, Ratnesh; Pitre, K S <br/> <br/>Abstract: The anti-HIV drug 3'-Azido-3'-deoxythymidine (Zidovudine) AZT has been quantitatively and qualitatively analysed by direct current polarographic (DCP), differential pulse polarographic (DPP) and amperometric techniques. AZT gives a well-defined polarographic reduction wave/peak with E1/2/Ep = - 1.42/ - 1.44 V versus SCE in 0.2 M KCL at pH = 6.0 ± 0.1. Fe (II)-AZT complex has been studied both in solid and aqueous phases. The IR spectral data on the drug and its Fe (II)-complex revealed complexation through -N atom of azide group. The data showed a shift in the band due to azide group in the complex from 2170 to 2150 cm⁻¹ in case of pure drug zidovudine. Hence, a tentative structure of the complex has been suggested. Antibacterial activity of the complex has been determined using Raper's paper disc method against Escherichia coli, Salmonella typhi, Vibrio cholerae, and Diplococcus pneumoniae bacteria. Looking at its increased inhibition power against the above test pathogens, it is presumed that the complex may prove to be more potent against HIV, as compared to AZT drug. <br/> <br/>Page(s): 526-528