Abstract: Cinnamic acid and derivatives thereof are well suited for promoting desquamation and/or stimulating epidermal renewal and/or combating intrinsic/extrinsic aging of the skin of a human subject in need of such treatment, by topically applying thereto, for such period of time as required to elicit the desired response, a cosmetically/therapeutically effective amount of cinnamic acid and/or of at least one derivative thereof.

Abstract: In an arrangement for protecting the output transistors in a power amplifier against temperatures exceeding a predetermined first temperature value, a temperature sensor is provided adjacent to the output transistors to sense their temperature and influence the power amplifier when the first temperature value is reached. The temperature sensor is adapted to vary the driving current of the power amplifier inversely proportional to the temperature of the output transistors for temperature values between the first temperature value and a predetermined higher temperature value.

Abstract: A process for preparing an acrylamide polymer is herein disclosed which comprises the step of initiating polymerization in the presence of an oxidation-reduction system polymerization initiator comprising two or more kinds of oxidizing agents and a reducing agent. According to this process, the polymerization rate can be remarkably increased without bringing about a decrease in the molecular weight of the polymer, and hence, restriction on manufacturing facilities and apparatuses can be relieved and productivity can be remarkably enhanced, which permits a decrease in manufacturing cost.