Abstract: According to the present invention, a process which comprises bringing polyethylene terephthalate having an intrinsic viscosity of at least 0.50 dl/g and a density of 1.38 g/cm.sup.3 or more into contact with water is provided.In the water-treated polyethylene terephthalate obtained in the present invention, amounts of oligomers and acetaldehyde formed at the time of molding said polyethylene terephthalate into molded articles are small, and the contamination of the mold therewith is difficult to occur and further the contents of said molded articles does not change in flavor and fragrance.

Abstract: According to the present invention, a process which comprises bringing polyethylene terephthalate having an intrinsic viscosity of at least 0.50 dl/g and a density of 1.38 g/cm.sup.3 or more into contact with water is provided.In the water-treated polyethylene terephthalate obtained in the present invention, amounts of oligomers and acetaldehyde formed at the time of molding said polyethylene terephthalate into molded articles are small, and the contamination of the mold therewith is difficult to occur and further the contents of said molded articles does not change in flavour and fragrance.

Abstract: According to the present invention, a process which comprises bringing polyethylene terephthalate having an intrinsic viscosity of at least 0.50 dl/g and a density of 1.38 g/cm.sup.3 or more into contact with water is provided.In the water-treated polyethylene terephthalate obtained in the present invention, amounts of oligomers and acetaldehyde formed at the time of molding said polyethylene terephthalate into molded articles are small, and the contamination of the mold therewith is difficult to occur and further the contents of said molded articles does not change in flavor and fragrance.

Abstract: A method for producing a compound semiconductor device includes covering all but the top part of an electrode comprising a refractory metal or refractory metal silicide disposed on a compound semiconductor substrate with an insulating film, producing a photoresist which completely covers the insulating film at a first side of the electrode, the top part of the electrode, and at part of a second side of the electrode using the photoresist as a mask and removing the insulating film at the second side of the electrode, removing the photoresist, and ion implanting using the insulating film remaining at the first side of the electrode and the electrode as masks.

Abstract: Disclosed is an electric apparatus comprising a housing with a door, a turntable arranged in the housing for rotating an object, a synchronous motor for driving the turntable, and a control portion for controllling the driving of the synchronous motor, the control portion having apparatus for storing the time required for the turntable to rotate once, apparatus for determining whether or not a time period which is approximately a natural number multiple of the time required for the turntable to rotate once, has elapsed since initiation of turntable rotation, and apparatus for stopping an operation for the rotation of the turntable on the basis of the determination that time, which is approximately a natural number multiple of the time required for one rotation of the turntable, has elapsed.

Abstract: An iron-aluminum-silicon (Fe-Al-Si) series magnetic alloy magnetic head is described. The magnetic head is filled between front gap forming surfaces (the front gap facing a magnetic tape) of a pair of Fe-Al-Si core pieces with non-magnetic ceramic films formed on the respective front gap forming surfaces and a glass film formed therebetween, and between rear gap forming surfaces for junction with an Ag-Cu-In series alloy film.

Abstract: Combustible gas detecting element for detecting the existence of combustible gas such as methane, ethane, propane iso-butane and hydrogen. The element comprises .alpha.-Fe.sub.2 O.sub.3 containing a small amount of sulfate ion (SO.sub.4.sup.--). By using a precipitation process with urea as a precipitant for preparing the above .alpha.-Fe.sub.2 O.sub.3, remarkably high stability and reliability can be released. Addition of quadrivalent metal of Sn, Zr or Ti to the .alpha.-Fe.sub.2 O.sub.3 greatly enhances the gas sensitivity to those gases. Furthermore the sensitivity to carbon monoxide was also enhanced by adding cadmium (Cd) and/or gold (Au).

Abstract: An organic metal compound containing elements constituting a magnetic material and an oxygen gas are introduced into plasmas at a low pressure and a thin film of magnetic oxide is prepared on an organic film or aluminum at low temperature.

Abstract: A glass optical element is directly press-molded by a method using a noble mold. The mold comprises a base material and a press surface film formed on the base material. The press surface film is an Ir film, or a Ru film, or an alloy film comprising Ir and at least a member selected from the group consisting of Pt, Re, Os, Rh and Ru, or an alloy film comprising Ru and at least a member selected from the group consisting of Pt, Re, Os and Rh.

Abstract: Ethylene/C.sub.4 -C.sub.20 alpha-olefin copolymers are disclosed which have new characteristics in regard to composition distribution, degree of branching, randomness and crystallinity by DSC melting points. These copolymers have excellent transparency, impact strength, tear strength, blocking resistance, environmental stress cracking resistance, heat resistance and low-temperature heat sealability in a well-balanced combination when they have a density of at least 0.90. When their density is less than 0.90, these copolymers have particularly excellent transparency, impact strength and low-temperature heat sealability, and by incorporating them in various thermoplastic resins, they serve as an excellent modifier for improved impact strength and low-temperature heat sealability.

Abstract: A vehicle which incorporates an air treatment unit mounted underneath the front instrument panel. A hollow center console box extends along the center of the floor of the vehicle passenger compartment in the longitudinal direction. An opening at the front end of the console box is connected to an air outlet of the air treatment unit, and an opening at the rear end of the console box opens towards a space defined underneath the front seating assembly of the vehicle between it and the floor. Thus treated air is led from the air treatment unit through the hollow console box and is emitted towards the space under the front seating assembly so as to pass therefrom into the rear seating space behind the front seating assembly, and there is no risk that the feet of a person seated on the front seating assembly obstruct this flow of treated air to the space underneath the front seating assembly.

Abstract: A combustible gas detecting element, the sensitive element of which has at least one material selected from the group consisting of gamma-type ferric oxide (.gamma.-Fe.sub.2 O.sub.3) and alpha-type ferric oxide (.alpha.-Fe.sub.2 O.sub.3) and has a microstructure with an average grain size smaller than 0.5 micrometers and a porosity of from 35 to 85%. The sensitivity is increased by adding at least one material selected from a group consisting of tin (Sn) and zinc (Zn) in a ratio from 0.5 to 70 mol %, based on stannic oxide (SnO) and zinc oxide (ZnO) relative to the ferric oxide component. The element is manufactured from fine particles obtained by coprecipitating metallic ions from a solution containing Fe ions and at least one member selected from the group consisting of Sn ions and Zn ions, and the fine particles are pressed and then sintered or are formed into a paste, printed on a substrate and then sintered.

Abstract: An air treatment assembly through which flows an air flow. The air flow is introduced into a ducting system, at an intermediate part of which a heater element is mounted. A first damper upstream of the heater divides the air flow into a first air flow portion passing through the heater and a second air flow portion bypassing the heater. First and second air outlets downstream of the heater element pass air out of the ducting system. A second damper, downstream of the heater element and upstream of the outlets, is movable between a first position in which it hinders the first and second air flows from mixing, so that the air passed out from the first outlet is primarily air from the first air flow, and the air passed out from the second outlet is primarily air from the second air flow; and a second position, in which it does not substantially hinder mixing of the first and second air flows, which meet downstream of the heater and mix well before being passed out from the air outlets.

Abstract: There is provided a novel combustible gas detecting element and method for production thereof. The element comprises a gas sensing body comprising a sintered body or film of an amorphous semiconductor comprising a metal oxide, a sulfate and halide.

Abstract: Combustible gas detecting element for detecting the concentration of a combustible gas such as isobutane, ethane, propane and hydrogen. It comprises .gamma.-Fe.sub.2 O.sub.3, .gamma.-Al.sub.2 O.sub.3 and at least one of La, Ce, Pr and Nd in terms of La.sub.2 O.sub.3, Ce.sub.2 O.sub.3, Pr.sub.2 O.sub.3 and Nd.sub.2 O.sub.3, respectively. This gas detecting element is an improvement over .gamma.-Fe.sub.2 O.sub.3, and is advantageous for its highly stable load life even under severe conditions of a high temperature and a high humidity and for its high sensitivity to a combustible gas.