http://localhost:80/xmlui/handle/123456789/19276 2026-04-23T00:17:29Z http://localhost:80/xmlui/handle/123456789/19947 Title: Conversion of Low Density Polyethylene into Fuel Products Using Gachi Clay as Catalyst Authors: ZAHID HUSSAIN; KHALID MOHAMMED KHAN; MUHAMMAD RASUL JAN; JASMIN SHAH Abstract: The use of Gachi clay as catalyst for the cracking of polyethylene was investigated. The yield of reaction was determined by the relative amounts of oil, wax and gas produced during the process. All the fractions were found to contain hydrocarbons. All the products of the reaction can be used as fuel or feed stock for the oil industry. The nature of liquid product was similar to gasoline. The relative proportion of the products of the reaction was found to depend upon the reaction conditions Therefore the amount of catalyst, temperature of pyrolysis and time for reaction was optimized both of the crude and activated forms of the catalyst separately. The cracking efficiency of the activated catalyst was found greater than that of crude. The liquid and wax products were separated by G.C. equipped with F.I.D. These products were identified as olefin and paraffin hydrocarbons using I.R. spectra and chemical tests. 2010-04-02T00:00:00Z http://localhost:80/xmlui/handle/123456789/19941 Title: Synthesis, Characterization and in vitro Antibacterial Studies of Ternary Complexes using Quinolone Antibiotics as Primary Ligand Authors: MUHAMMAD IMRAN; TABINDA KOKAB; SHOOMAILA LATIF; MTTU LIVIU; ZAID MAHMOOD Abstract: Some new first row transition metal ternary complexes of quinolone antibiotics (Levofloxacin, Moxifloxacin) and 1,10-phenenthroline were prepared and characterized on the basis of UV-Vis spectroscopy, IR spectral data, magnetic moment, elemental analysis and conductometric measurements. Ligands were found to be bidentate in nature and elemental analysis data revealed [MLL¢´] configuration for all metal complexes. (Where L is respective quinolone antibiotic and L¢ is 1,10-phenenthroline). Conductometric measurements suggested electrolytic nature of all metal complexes. All the synthesized metal complexes were evaluated for their in vitro antibacterial and antifungal activity against three bacterial species, Escherichia Coli (Gram -ve), Mycobacterium smegmatis (Gram +ve), Pseudomonas aeuroginosa (Gram -ve) and three fungal species, Nigrospora oryzae, Aspergillus niger and Candida albicans respectively. All the metal complexes were found to have appreciable antimicrobial activity. 2010-04-16T00:00:00Z http://localhost:80/xmlui/handle/123456789/19940 Title: 2,7-DICHLOROFLUORESCEIN: A SUITABLE COMPLEXING AGENT FOR THE SPECTROPHOTOMETRIC DETERMINATION OF OFLOXACIN IN PURE AND PHARMACEUTICAL DOSAGE FORMS Authors: SYED HASNAIN ALI; AZIZ UR REHMAN; MUHAMMAD JAHANGIR; SABAHAT ZAHRA SIDDIQUI; MUHAMMAD ASHFAQ; MUHAMMAD ZAHID QURESHI; MUHAMMAD ATHAR ABBASI; VIQAR UDDIN AHMAD Abstract: Ofloxacin is a broad spectrum antibiotic effective against many Gram positive and Gram negative bacteria as well as for some key anaerobes. Ofloxacin was reacted with 2,7-dichloroflourescein in an acidified medium at room temperature to give a crimson-red complex which was measured at 430 to 460 nm (working wavelength 430 nm), thus providing a basis for a new spectrophotometeric method of analysis for ofloxacin in armaceutical dosage forms. The complex in solution form obeyed the Beer’s Law between 0.02-0.25 mg/mL. The limit for detection was 0.02 mg/mL. The relative standard deviation was found to be 0.67 %. Similarly the molar absorptivity for complex was calculated to be 0.01×10⁴ dm³mole⁻¹cm⁻¹. This method was found to be useful for the estimation of ofloxacin in pure as well as in pharmaceutical formulations. This method was easy to execute at laboratory level and required non cumbersome methodology, with a relatively high precision and accuracy. 2010-04-02T00:00:00Z http://localhost:80/xmlui/handle/123456789/19895 Title: Arsenic Contamination in Water and its Removal by using Different Low Cost Adsorbents Authors: NASEEM ZAHRA Abstract: Industrial waste constitutes the major source of various kinds of pollution in natural water and toxicity from heavy metals has been reported worldwide. The presence of arsenic in water is major problem these days. High arsenic concentrations have been reported recently from the USA, China, Chile, Bangladesh, Taiwan, Mexico, Argentina, Poland, Canada, Hungary, Japan and India. Arsenic pollution also has emerged as a serious public health concern in Pakistan also. The presence of metal in drinking water is of special concern because of its persistence and toxicity. Different adsorbents are used to remove arsenic from water. In present review paper arsenic contamination, its toxicity and its removal from drinking water using different adsorbents is described. 2010-04-20T00:00:00Z