Abstract: A power control device of the present invention controls the electric power of a vehicle which includes hot-wire heaters provided respectively in a plurality of areas which are obtained by dividing a front window. In particular, the power control device of the present invention switches between alternating control and entire surface control based on an external air temperature of the vehicle and a speed of the vehicle, the alternating control being for sequentially energizing each hot-wire heater provided in each of the plurality of areas, and the entire surface control being for simultaneously energizing all the hot-wire heaters provided in the plurality of areas.

Abstract: A preventive agent against adhesion of a marine organism comprising: at least one amine compound represented by the following formula (I): ##STR1## , wherein R is a C.sub.8-22 saturated or unsaturated aliphatic hydrocarbon group, R.sup.1 is hydrogen atom, aminopropyl, a C.sub.1-22 saturated aliphatic hydrocarbon or C.sub.2-22 unsaturated aliphatic hydrocarbon group, R.sup.2 is aminopropyl, a C.sub.1-8 saturated aliphatic hydrocarbon or C.sub.2-8 unsaturated aliphatic hydrocarbon group, provided that R.sup.1 is hydrogen atom or aminopropyl group when R.sup.2 is represents aminopropyl group, or a salt thereof; and at least one N-alkyl polyamine compound represented by the following formula (II):R--?NH(CH.sub.2).sub.3 !.sub.n --NH.sub.2 (II), wherein R is a C.sub.8-22 saturated or unsaturated aliphatic hydrocarbon group and n is an integer from 2 to 4, or a salt thereof in an amount of 0.1 to 9 parts by weight to one part by weight of the compound (I).

Abstract: New gel product for exterminating harmful marine organisms. Comprises (a) about 1 to 25% by weight of a natural high molecular weight compound capable of forming a gel in water, (b) about 5 to 30% by weight of an agent for exterminating harmful marine organisms, (c) about 1 to 25% by weight of at least one compound selected from the group consisting of a water soluble synthetic linear polymer, an inorganic substance, a surfactant, an organic solvent, a gel-modifier, and mixtures thereof, and (d) water.