Encapsulation of a highly sensitive EPR active oxygen probe into sonochemically prepared microspheres

Article Abstract:

A solution of perchlorotriphenylmethyl triester (PTM-TE, a stable organic free radical) dissolved in hexamethyldisiloxane (HMDS) is encapsulated by using high-power ultrasound into a polymerized shell of bovine serum albumin (BSA). It is found that the method leads to an overall loss of EPR signal intensity from the washed suspension of microspheres and the encapsulated PTM-TE/HMDS solution is found to be sensitive to the partial pressure of oxygen in the muscle and tumor tissue of mice.

Chemical preparations, not elsewhere classified, Free Radicals, Observations, Free radicals (Chemistry), Transmission electron microscopes

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Oxygen effects on the EPR signals from wood charcoals: experimental results and the development of a model

Article Abstract:

The effect of oxygen in the EPR spectral properties of wood charcoals is measured and a model based on the properties of charcoals and EPR relaxation mechanisms is developed. EPR line broadening in these materials has correlated with char surface area and the concentration of adsorbed oxygen.

Oxygen, Industrial Gas Manufacturing, Industrial gases, Charcoal, Gum and wood chemicals, Relaxation phenomena, Relaxation (Physics)

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Effect of ultrasound frequency on pulsed sonolytic degradation of octylbenzene sulfonic acid

Article Abstract:

The effect of ultrasound frequency on the pulsed sonolytic degradation of octyl benzenesulfonate (OBS) is examined. The studies have shown that sonolytic degradation of OBS has depended on both the sonochemical activity and the accumulation of OBS on cavitation bubble surfaces.

Petrochemical Manufacturing, Benzene, Cavitation, Decomposition (Chemistry), Acoustic properties

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