Surface tensions of aqueous solutions of lithium dodecyl sulfate, sodium oleate, and dodecylbenzene sulfonic acid in contact with methane under hydrate-forming conditions

Six commercial disinfectants were tested for their efficacy in inactivating hepatitis A virus in solution or attached to agri-food surfaces. Disinfectant I contains 10% quaternary ammonium plus 5% glutaraldehyde;disinfectant II contains 12% sodium hypochlorite; disinfectant III contains 2.9% dodecylbenzene sulfonic acid plus 16% phosphoric acid; disinfectant IV contains 10% quaternary ammonium; disinfectant V contains 2% iodide; and disinfectant VI contains 2% stabilized chlorine dioxide. Among these, disinfectants I and II were shown to be the most effective in inactivating hepatitis A virus in solution. The efficacy of these disinfectants was further tested against hepatitis A virus attached to common agri-food surfaces, including polyvinyl chlorine, high-density polyethylene, aluminum, stainless steel, and copper. Disinfectant II was shown to be the most effective, with a maximum inactivation level of about 3 log10. The inactivation efficacy was shown to be affected by the concentration of the active ingredient, the contact time between the disinfectant and the contaminated surfaces, and the incubation temperature. In general, hepatitis A virus was shown to be highly resistant to most disinfectants tested, and high concentrations of active ingredient were needed to achieve acceptable inactivation levels.

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Variation of surface tension in aqueous solutions of sodium dodecyl sulfate in the flotation bath

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/s0927-7757(01)00575-1 ◽

2002 ◽

Vol 196 (1) ◽

pp. 19-24 ◽

Cited By ~ 24

Author(s):

F Hernáinz ◽

A Caro

Keyword(s):

Surface Tension ◽

Sodium Dodecyl Sulfate ◽

Aqueous Solutions ◽

Sodium Dodecyl ◽

Dodecyl Sulfate

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In-situ polymerization of EDOT in water/methanol with different DBSA contents

e-Polymers ◽

10.1515/epoly.2008.8.1.955 ◽

2008 ◽

Vol 8 (1) ◽

Author(s):

Chia-Fu Chen ◽

Chi-an Dai ◽

Wen-Yen Chiu

Keyword(s):

Spin Coating ◽

Sulfonic Acid ◽

In Situ Polymerization ◽

Smooth Surfaces ◽

Water Mixture ◽

Degradation Temperature ◽

Morphology Of Films ◽

Dodecylbenzene Sulfonic Acid

AbstractIn this work, poly(3-ethylenedioxythiophene) (PEDOT) was synthesized on glass by spin coating for 10 seconds at 500 rpm and polymerization was carried out in an oven at 110°C for 10 min. Methanol and water mixture were used as the solvent and dodecylbenzene sulfonic acid (DBSA) as the surfactant. The conductivities of films were measured and their relationship with different solvent or various surfactant contents were discussed. The morphology of films was observed by SEM, and PEDOT synthesized in methanol-rich solvents or with less DBSA content had more smooth surfaces, showed lower degradation temperature (by TGA). Also, PEDOT synthesized in methanol-rich solvents or with less DBSA were doped better, as observed by UV-Vis spectra.

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