Abstract: A magnesium alloy having excellent castability and creep properties has compositions of 1.0-6.0 wt % Zn, 0.5-3.0 wt % Ca, 1.0 wt % or less Zr, 1.0-5.0 wt % at least one lanthanoid, the remainder being Mg and unavoidable impurities. This magnesium alloy undergoes heat treatment of heating the magnesium alloy to 430-470 ° C., quenching, and then heating to 150-250 ° C. for aging. Hot tearing and temperature strength are improved by the addition of an element which is effective for causing eutectic reaction and peritectic reaction with Mg and making Mg particles divied finely.

Abstract: A heat-resistant magnesium alloy exhibiting excellent heat resistance and castability, which comprises 1.0 to 6.0 % by weight of zinc, 0.4 to 1.0 % by weight of zirconium, 1.5 to 5.0 % by weight of rare earth element, up to 0.3 % by weight of calcium, magnesium being as the balance, and unavoidable impurities.

Abstract: An oxygen generating electrode has a base material with at least a surface thereof made of titanium alone or a titanium alloy, a primary coating formed on the surface of the base material, and a catalyst layer formed on the primary coating and containing an oxide of platinum group element as a main component. The primary coating is composed of a titanium oxide coating and an oxide mixture layer, the titanium oxide coating being made of a titanium oxide only and including a first titanium oxide layer formed by electrolytically oxidizing the surface of the base material and a second titanium oxide layer formed on the first titanium oxide layer by a thermal decomposition method, the oxide mixture layer including at least one layer formed on the titanium oxide coating and consisting of a mixture containing an oxide of an element belonging to a group other than the platinum group, as a main component, and an oxide of a platinum group element.

Abstract: There is provided a metal foil manufacturing method, in which a metal foil is manufactured by forming a thin metal layer by electrodepositing a metal on the surface of a cathode through an electrolytic reaction, and then separating the thin metal layer from the cathode surface. In doing this, an anodized film forming apparatus is mounted on an exposed surface of the cathode exposed after the separation of the metal layer, and is operated to subject the exposed surface of the cathode continuously or intermittently to electrolytic oxidation, thereby forming an anodized film on the exposed surface.

Abstract: An optically active compound represented by the general formula (I) of:R--Z--COO--(Ph).sub.k --Ph(Y)--CO--(CH.sub.2).sub.m C*HE L (1)In the general formula (I); R is an alkyl or alkoxy group having 4 to 22 carbon atoms; Z is the one selected from the group consisting of --Ph--, --Ph(X)--, --Ph--Ph--, Ph(X)--Ph--, --Ph--cy--, --Ph(X)--cy-- and --py--Ph-- is a 1,4-substituted phenylene group; --Ph--Ph-- is a 4,4'-substituted diphenylene group; --cy-- is a trans-1,4-cyclohexane group, --py is 2,5-substituted pyrimide group; X is a halogen atom at the ortho-position to R; k is zero or 1, Y is the one selected from the group consisting of H, OH, halogen atoms and methyl group; C* is an asymmetric carbon atom; E is the one selected from the group consisting of methyl group, halogen atoms and CF.sub.3 ; L is an alkyl, aryl or aralkyl group having not more than 10 carbon atoms; and m is an integer of zero to 6 where m takes zero when Y is H and Z is --Ph-- or --Ph--Ph--.

Abstract: A thermal control coating composition comprising a binder made of a condensation polymerization product of Si--(OR).sub.4 added with titanium oxide acting as a white pigment, common mica particles for improving resistance to thermal cycling and cerium oxide particles for improving the resistance to UV irradiation. The thermal control coating composition has an initial solar absorptance (.alpha..sub.s) of not more than 0.3 and an initial thermal emittance (.epsilon.) of not less than 0.8. The coating composition exhibits excellent properties when subjected to an ageing test corresponding to the use thereof on a standstill orbit for 10 years. The weight of the paint may be reduced by the use of the coating composition of the invention such that an antenna (having a diameter of 3.5 m) of a large capacity communications satellite is coated with 3 kg of the coating composition of the invention to form a durable coating comparable to a coating formed by using 6 kg of a conventional thermal control paint.

Abstract: In a battery having a cathode in which a halogen is employed as an active material, the halogen is dissolved in an organic solvent such as a halogenated hydrocarbon, whereby the halogen is stored, and is utilized when needed. This battery can be applied as both a primary battery and a secondary battery. According to the battery of the present invention, a power required during the operation of the battery is reduced, whereby the total energy efficiency of the battery can be improved.

Abstract: A waste water-treating method, which comprises the steps of: adjusting the pH value of an aqueous solution containing a nitrous acid radical within a range of 2 to 5; treating said aqueous solution with hydrogen peroxide to oxidize the nitrous acid radical into a nitric acid radical; and throwing away the waste water in the neutralized form.