http://localhost:80/xmlui/handle/123456789/17397 2026-04-05T02:46:34Z http://localhost:80/xmlui/handle/123456789/18986 Title: STUDIES OF ANTIOXIDANT ACTIVITY OF ESSENTIAL OILS OF UMBELLIFERAE FAMILY Authors: T. Rana; M. A. Kashmiri; M. Ahmad Abstract: The antioxidative activity of the essential oils of the species (Apium graveolens, Ferula ovina, Foniculum vulgare, Trachyspermum ammi) of family Umbelliferae in Pakistan has been studied by accelerated oxidation method (AOM) and peroxide value (POV) at 0.01% concentration and 40o C temperature in cotton seed oil. The antioxidative activity was compared with antioxidative activity of standard antioxidant BHT. Ferula Ovina showed better antioxidative activity than the standard antioxidant and other species. The activity of essential oil of Apium graveolens at 0.01% concentration is almost equal to BHT. While the essential oils of Foniculum vulgare, Trachyspermum ammi with 0.01% concentration showed weaker antioxidative activity than BHT. The essential oils were found to be rich in oxygenated compounds and had better activity. 2010-06-17T00:00:00Z http://localhost:80/xmlui/handle/123456789/18985 Title: ELECTROCHEMICAL BEHAVIOUR OF CERIUM OXIDE INCORPORATED LEAD DIOXIDE ELECTRODES ELECTRODEPOSITED FROM Ce+3 CONTAINING Pb++ ELECTROLYTES Authors: M. Amjad; Toqeer Ahmed Abstract: A moderate layer of PbO2 onto stainless steel from nitric acid solutions in the presence and absence of Ce+3 and Ce +4 ions has been electrodeposited. The properties like stability and the ability to support anodic oxidations of organic molecules have been investigated. The activity of these anodes depends on the preparation and pre-treatment of the electrode. The investigations suggest that the stability and activity of the lead dioxide anode is influenced by the presence of Ce+3 / Ce+4 ions in the lead dioxide electrodeposits. 2010-06-16T00:00:00Z http://localhost:80/xmlui/handle/123456789/18984 Title: SORPTION POTENTIAL OF COPPER IONS FROM AQUEOUS SOLUTIONS ONTO Cicer arietinum HUSK Authors: M. Sher; N. Parveen; N.Batool; M. A. Hussain; M. Ali; M. A. Shaheen; S. Bashir Abstract: Efficient removal of copper from aqueous media was carried out using Cicer arietinum husk, a biosorbent. Sorption phenomenon was studied in detail by varying solution pH, contact time and sorbent dose. The results indicated the significant enhanced sorption of copper ions after thermal (100-800° C) treatments of biosorbent. About 100% removal of copper was achieved by thermally treated sorbent in 1.30 h, therefore, C. arietinum husk appears to be an efficient and cost effective biosorbent to remove copper ions from industrial effluents. The method used is convenient, efficient and free from interferences, hence it can be adopted for industrial waste water treatment. 2010-06-16T00:00:00Z http://localhost:80/xmlui/handle/123456789/18983 Title: EVALUATION OF BAUXITE OF KHUSHAB (PAKISTAN) AS A RAW MATERIAL FOR EXTRACTION OF ALUMINUM Authors: M.A. Shaheen; S. I. Rana; M. I. Tariq; F. Rehman; A. Karim; N. Ahmad; M. Aziz; S. Murtaza Abstract: Bauxite ore found at Punjab Quarry, Khushab (Pakistan) has been analyzed and evaluated to determine its constituents and feasibility of extracting aluminum by Bayer Process. Al, Fe, Ti, Ca, Na, K, Mg, Cl, and Si have been estimated in the samples .The highest alumina (Al2O3) content (60 to 73 %) has been found in the deposits of Punjab Quarry. From the data obtained in this study, it may be safely said that bauxite of this area is suitable for extraction of aluminum by a small size Bayer Process Plant having annual feed of 1.2 million tons. 2010-06-15T00:00:00Z