NOPR Collection:

Reaction kinetics of Parachlorophenol and Sodiumhydroxide

Sun, 01 Apr 2001 00:00:00 GMT

Title: Reaction kinetics of Parachlorophenol and Sodiumhydroxide Authors: Natarajan, M; Nalini, P; Dawn, S S; Mary, D; Balu, K Abstract: Sodium phenoxide is one of the important raw materials used in the manufacture of clofibrate, a product of medicinal value. Reaction between p-chlorophenol and sodium hydroxide is carried out at atmospheric conditions to yield sodium phenoxide. It is observed experimentally that the reaction is second order and the rate constant is estimated as 12.51 x 10^-3 L/mol/min. Page(s): 348

Biokinetic Studies of Tannery Effluent Under Aerobic Oxidation Process

Sun, 01 Apr 2001 00:00:00 GMT

Title: Biokinetic Studies of Tannery Effluent Under Aerobic Oxidation Process Authors: Prakash, N B Abstract: A laboratory scale experiment was conducted on aerobic digestion of tannery effluent using cowdung as the seed material. The BOD removal of 95.8 per cent was obtained at an optimum organic load of 0.6 kg BOD/m³/d. Biokinetic coefficients were calculated for the data obtained to study the metabolic performance of the microorganisms. Page(s): 344-347

Microemulsion and Conventional Emulsion Copolymerizations of Styrene with n-Butyl Methacrylate, and Characterization of the Copolymers

Sun, 01 Apr 2001 00:00:00 GMT

Title: Microemulsion and Conventional Emulsion Copolymerizations of Styrene with n-Butyl Methacrylate, and Characterization of the Copolymers Authors: Reddy, G V Ramana; Balaji, T S; Kannan, P Abstract: Microemulsion (ME) and conventional emulsion (CE) copolymerization of styrene (STY) with n-butyl methacrylate (BMA) were carried out at 70^oC under inert atmosphere with sodiumlauryl sulphate (SLS) as surfactant, n-hexanol (HA) as cosurfactant and potassium persulphate (KPS) as the free radical initiator. Five monomer mixtures in the initial reaction mixtures were used and the reactions were arrested at lower conversions. The copolymers thus obtained were characterized by FTIR, NMR, TG/DTA, GC and GPC. The monomer composition of the copolymers were evaluated from the ¹HNMR spectral data. The reactivity ratios for the ME and CE copolymerization of styrene (STY) (r_STY) with n-butyl methacrylate (BMA) (r_BMA) as determined by Fineman-Ross (F-R), Kelen-Tudos (K-T) and Mayo-Lewis (M-L) methods were 0.74±0.02 and 0.64±0.02, and 0.58±0.02 and 0.39 ±0.02, respectively. Page(s): 336-343

Synthesis and Antimicrobial Activity of Some New N-Methylpiperazinylthiadiazoles and Their Azetidinones

Sun, 01 Apr 2001 00:00:00 GMT

Title: Synthesis and Antimicrobial Activity of Some New N-Methylpiperazinylthiadiazoles and Their Azetidinones Authors: Jaish, L; Srivastava, S K Abstract: A series of 2-arylidenimino-5-( N⁴-methyl-N^l-piperazinylmethyl)-1 ,3,4-thiadiazole, 4, have been synthesized via condensation of 2-amino -5-(N⁴-methyl-N¹-piperazinylmethyl)-1,3,4-thiadiazole with various carbonyl compounds. Cycloaddition of chloroacetyl chlorride to 4 gives 1-[5'-(N⁴- methyl-N¹-piperazinylmethyl)-1', 3', 4'-thiadiazole-2'-yl]-4-substituted-3-chloro-2-azetidinones, 5. Compounds 4 and 5 have been screened for their antibacterial and antifungal activities. Page(s): 331-335