A Experimental Studies

A 40-mm i.d. Lucite column served as the reactor for the experiments of Haure et al. (1989). Reactor and feed system are shown schematically 

In Haure s work, the gas phase leaving the reactor was not analyzed. 

Conversion and the mean rate of reaction were obtained by titrating the liquid recovered from the bed for total acidity before and after dissolved SO2 and sulfurous acid were oxidized to sulfuric acid. The difference between these measurements allowed calculation of the SO2 conversion. An extension of the Haure study (Metzinger et al., 1992) added gas phase analysis and a check of the results through a sulfur balance. Computer control of flow interruption and acquisition of the SO2 analyzer readings were also added. 

An exception to improved performance under flow interruption is for a group of points at t = 90 min with s = 0.01. In these experiments water flowed through the trickle bed for less than 1 min during a cycle. The oxidation rate under steady state is close to the maximum steady-state rate. Even though the scatter of the experimental data at s = 0.01 is large, all the measurements under flow interruption lie below the line representing steady state. 

Haure et al. (1989) also undertook experiments in which the liquid flow rate was periodically reduced rather than interrupted. Switching between time-average liquid velocities of 4.0 and 1.2 mm/s at s = 0.5 resulted in about a 10% increase in the time-average rate of S02 oxidation over steady state. The rate improvement was independent of r over the 2 to 60 min range explored. This is considerably less than the increase when flow interruption is utilized. 

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Adadurov, G.A., Experimental Study of Chemical Processes Under Dynamic Compression Conditions, Russian Chem. Rev. 55 (4), 282-296 (1986). 

III. Effect of Surface-Active Agents A. Experimental Studies... 

Sancho-Chust, V., Bengochea, M., Fabra-Campos, S., Casabo, V.G., Martinez-Camara, M.J., and Martin-Villodre, A., Experimental studies on the influence of surfactants on intestinal absorption of drugs. Cefadroxil as model drug and sodium lauryl sulfate as model surfactant studies in rat duodenum, Arzneim.-Forsch./Drug Res., 45, 1013, 1995. 

Lai. F.C and Kulacki, F.A., Experimental Study of Free and Mixed Convection in Horizontal Porous Layers Locally Heated from Below , Int. J. Heat and Mass Trans.. Vol. 34, pp. 525-541, 1991. 

Wang, F., Li, Y., and Zeng, Q. A Experimental Study on the New Type Fast Fluidized Bed for Clean Combustion (Chinese), The Proceeding of 5th National Conference on Fluidization, pp. 375-378 (1990). 

Zheng, Q., Ma, Z., and Wang, A. Experimental Study on the Flow Pattern and Flow Behaviour of Gas-Solid Two Phase Flow in L-Valve, in Circulating Fluidized Bed Technology IV (Amos A. Avidan, ed.), pp. 290-295. Somerset, Pennsylvania (1993). 

Tabatabaei S, Shukohfar A, Mirhabibi A. Experimental study of the synthesis and characterization of silica nanoparticle via sol-gel method. J Phys Conf Series 2006 26 371-374. 

Sastry, V.R.K., Phatak, S.O. and Sethuramiah, A., Experimental Study of the Influence of Liquid Lubricants on Burnished M0S2 Films, Wear, 86, 213, (1983). 

Tiscareno-Lechuga F, Hill Jr. G.C. and Anderson M.A., Experimental studies of the non-oxidative dehydrogenation of ethylbenzene using a membrane reactor, Appl. Catal. 96 33 (1993). 

Cath T and Childress A, Experimental study of desalination using direct contact membrane distillation A new approach to flux enhancement. 14th Annual Meeting of North American Membrane Society, Jackson Hole, WY, May 17-21, 2003. 

Shukla A and Kumar A. Experimental studies and mass-transfer analysis of the hydrolysis of ohve oil in a biphasic zeohte-membrane reactor using chemically immobilized lipase. Ind Eng Chem Res 2004 43(9) 2017-2029. 

Aboudheir, A., Akande, A., Idem, R., and Dalai, A. Experimental studies and comprehensive reactor modeling of hydrogen production by the catalytic reforming of crude ethanol in a packed bed tubular reactor over a Ni/Al203 catalyst. International Journal of Hydrogen Energy, 2006, 31 (6), 752. 

Interest in vitamin A and its synthetic analogs as a potential factor in the prevention and treatment of certain types of cancer has been growing. In addition, there is evidence that vitamin A may be related to pollutant toxicity. Recent epidemiological studies in humans with a sample of 8000 men in Chicago showed a low lung cancer incidence in those with a high vitamin A level in the diet, while the incidence was higher in those people with a low dietary vitamin A. Experimental studies show that rats exposed to PCB, DDT, and dieldrin caused a 50% reduction in liver vitamin A store. In another study, rats deficient in retinol were shown to have a lowered liver cytochrome P-450 activity. The effect of vitamin A deficiency on MFO enzymes, however, depends on several factors such as substrate, tissue, and animal species. 

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Hayes R.E., Afacan A., Boulanger B., Tanguy P.A., Experimental study of reactive mixing in a laminar flow batch reactor, Trans IChemE 76 (1998) 1,... 

Wasche, R.. Naito. M.. and Hackley. V.A.. Experimental study on zeta potential and streaming potential of advanced ceramic powders. Powder Technol.. 123, 275, 2002. 

Leaf A, Kang JX, Xiao Y-F, Billman GE, Voskuyl R A. Experimental studies on antiarrhythmic and antiseizure effects of polyunsaturated fatty acids in excitable tissue. J Nutr Biochem 1999 10 440-448. 

Drucker, M. Cardenas, E. Arizti, R Valenzuela, A. Gamboa, A. Experimental studies on the effect of lidocaine on wound healing. World J. Surg. 1998, 22 (4), 394-397. 

Lu, W. Tassou, S.A. Experimental study of the thermal characteristics of phase change slurries for active cooling. AppZ Energ 91(1) (2012) 366-374. 

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