NOPR Collection:

Coating of Paper Sheet with Insoluble Gelatin

Sat, 01 Sep 2001 00:00:00 GMT

Title: Coating of Paper Sheet with Insoluble Gelatin Authors: Mansour, Olfat Y; Sefain, Magdi Z; Ibrahim, Maha M; El-Zawawy, Waleed K Abstract: Treatment of paper with internal sizing agents, not only reduces the penetration of liquids, but also affects the permeability. The mechanism by which sizing brings about resistance to penetration by liquids is explained by the contact-angle theory. Also the precipitation of the rosin size on the fiber forms a water-repellent film upon drying. On the other hand, surface coating of paper sheets with gelatin-hexamine mixture, in different concentrations, results in an improvement in the permeability compared to the uncoated sheets. This could be due to the penetration of the gelatin through the pores of the paper sheet and precipitates as an insoluble film on the fiber, due to cross-linking formed through formaldehyde, which is liberated as a result of hexamine degradation. Page(s): 748-752

Identification and Utilization of Banana Plant Juice and Its Pulping Liquor as Anti- Corrosive Materials

Sat, 01 Sep 2001 00:00:00 GMT

Title: Identification and Utilization of Banana Plant Juice and Its Pulping Liquor as Anti- Corrosive Materials Authors: El-Sayed, Mohamed; Mansour, Olfat Y; Selim, Ibrahim Z; Ibrahim, Maha M Abstract: Banana plant juice, taken from paradica and maghraby banana pseudostem, as well as black liquor resulting from pulping the banana plant with either 10 or 23 per cent sodium hydroxide (w/w) were identified for their chemical composition. On the other hand the use of these admixtures as anti -corrosive materials was studied by applying the weight loss method. The results indicate that the maximum inhibition varies according to the anti-corrosive material used. The addition of the banana plant juice leads to an increase in the protection per cent, since it forms a protected layer on the concrete steel surface and hence prevent it from corrosion. Page(s): 738-747

Recovery of Indigo from a Textile Effluent in Nigeria

Sat, 01 Sep 2001 00:00:00 GMT

Title: Recovery of Indigo from a Textile Effluent in Nigeria Authors: Ajibola, V O Abstract: Indigo was recovered from a textile effluent using a method of acid precipitation followed by purification with acetone. Structural studies using UV\visible spectroscopy showed that the recovered indigo has λ_max at 600 nm. The results showed a preponderance of the cis-isomer. Recovery of indigo gave better quality effluent. Page(s): 735-737

Production of Automotive Catalytic Converter based on Non-noble Metal Catalyst Technology: A Feasible Option

Sat, 01 Sep 2001 00:00:00 GMT

Title: Production of Automotive Catalytic Converter based on Non-noble Metal Catalyst Technology: A Feasible Option Authors: Biniwale, Rajesh B; Bawase, Moqtik A; Deshmukh, M M; Labhsetwar, N K; Kumar, R; Hasan, M Z Abstract: Vehicular emission is the major contributor to the air pollution problem because of the increased vehicle population. A technology is needed to control autoexhaust pollution problem so as to meet the emission standards set up by government legislation and the upcoming more stringent emission norms. The catalytic converter is successfully utilized to control air pollution from vehicular emissions. National Environmental Engineering Research Institute (NEERI) has developed a non-noble metalbased catalytic converter considering the present and future emission standards. These non-noble metal based converters can also be fitted to old, on-road vehicles, which shares major part of total vehicular emissions, and thus a large market is readily available. Financial analysis reveals that the technology is cost-effective and has wide commercial application. Page(s): 728-734