Abstract: The present invention relates to a process for preparing an aqueous solution of sulfonated melamine-formaldehyde resin, and a cement composition in which the solution and a setting retarder are added to a concrete, a mortar, a cement paste or the like. And the process comprises the following step (A), step (B) and step (C): Step (A): a step of adjusting an aqueous solution containing melamine (a), formaldehyde (b), sulfanilic acid (c) and an alkali substance (d) to (a):(b):(c)=1:2.5-3.5:0.5-1.5 in molar ratio and its pH to 8.0-13.5, and thereafter heating the aqueous solution at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 40-90 mol % of the amount of sulfanilic acid charged; Step (B): a step of adding an inorganic acid to the reaction liquid obtained in the step (A) to adjust its pH to 6.0-8.0, and thereafter heating the reaction liquid at 50-90° C.

Abstract: A disc ejection device is provided separate from a disk loading device in a disc device for disc playback or recording. When a disc loaded on a turntable in a disc driving section is ejected, it is lifted up by a moving table, is fed out by a first ejection member, and is then ejected from an ejection slot by a second ejection member disposed near the ejection slot. Immediately after the first ejection member feeds out the disc, it returns to an initial retracted state so as to allow a new disc to be loaded into the disc driving section. Accordingly, the loaded disc and a new disc can be switched inside the disc device.

Abstract: The present invention relates to a process for preparing an aqueous solution of sulfonated melamine-formaldehyde resin, and a cement composition in which the solution and a setting retarder are added to a concrete, a mortar, a cement paste or the like. And the process comprises the following step (A), step (B) and step (C): Step (A): a step of adjusting an aqueous solution containing melamine (a), formaldehyde (b), sulfanilic acid (c) and an alkali substance (d) to (a):(b):(c)=1:2.5-3.5:0.5-1.5 in molar ratio and its pH to 8.0-13.5, and thereafter heating the aqueous solution at 50-90° C. to conduct the reaction until free sulfanilic acid decreases to 40-90 mol % of the amount of sulfanilic acid charged; Step (B): a step of adding an inorganic acid to the reaction liquid obtained in the step (A) to adjust its pH to 6.0-8.0, and thereafter heating the reaction liquid at 50-90° C.

Abstract: A transmission gear is comprised of a fitting portion of an upper toothed wheel being fit with a fitting portion of a lower toothed wheel so that both are axially movable. Accordingly, even in the event that a lid plate which has a disk introducing mechanism and a clamping chassis which has a clamping mechanism ascend or descend, certain power can be transmitted to a large gear (first gear) and a rotating cam (second gear) in a sure manner. Thus, the disk introducing mechanism and the disk discharging mechanism can both be driven with a single simple power transmitting mechanism. Also, the disk introducing operation and the disk discharging operation can be performed in a parallel manner, thereby reducing the amount of time required to exchange disks.

Abstract: According to the present invention, when a disk package is inserted from an insertion port in X1 direction into a package loading area, an edge portion of a case comes into abutment with a receiving portion of a moving plate and moves from position (a) to position (b) together with the moving plate. At this time, a push-up piece of the moving plate pushes a to-be-pushed-up portion of a contact mechanism portion in Z2 direction, so that the contact mechanism portion is turned in &bgr;2 direction from position (c) to (d). As a result, contacts come into abutment and hence into electrical connection with connection terminals of the disk package. Since this abutment is effected immediately before the loading of the disk package is completed, the contacts slide slightly on the connection terminals.

Abstract: A stopper is disposed so as to be opposite to trays, the drawing lever is disposed so as to be opposite to a tray, the lifting base is disposed opposite to a tray when a package is loaded to the disk operating apparatus to restrain the trays from projecting from the package. The bottom tray can be drawn out by the drawing lever immediately after the loading of the package to the disk operating apparatus. A stopper can be turned by an operation to move a lifting base so that the tray can immediately be drawn out.

Abstract: A novel amino resin composition produced by reacting one of or a mixture of more than two triazine derivatives of Formula I: ##STR1## wherein, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represent an independent substituent, and one to five substituents thereof represent a C.sub.1 -.sub.20 alkyl group, a C.sub.2-20 alkenyl group (the alkyl group or alkenyl group may optionally have an alicyclic structure of phenyl group), or a phenyl group, and the remaining substituent or substituents represent a hydrogen atom with formaldehyde; a novel amino composition produced by reacting a mixture of one of or a mixture of more than two of said triazine derivatives and melamine or urea with formaldehyde; and an amino composition comprising a novel amino composition produced by reacting a mixture of one of or a mixture of more than two triazine derivatives with formaldehyde and a melamine-formaldehyde resin and a melamine/urea-formaldehyde resin or a urea-formaldehyde resin.

Abstract: A translation rule learning scheme for a machine translation using a computer, in which an original sentence in a first language and a translated sentence in a second language of a bilingual text are analyzed to obtain dependency structures indicating a predicate and a case information associated with the predicate in each language; case frame correspondences between the first and second languages are estimated by estimating correspondences of words in the dependency structures in the first and second languages according to a bilingual dictionary; the estimated case frame correspondences are modified by comparing the case information in the dependency structures in the first and second languages and estimating a missing case information in one language from an existing case information in another language; and translation rules are extracted from the modified case frame correspondences.

Abstract: Novel dithiolane derivatives of formula: ##STR1## wherein X is, a C.sub.2 -C.sub.7 alkylcarbonyl group, benzoyl group, benzoyl group substituted with 1-3 groups selected from halogen, C.sub.1 -C.sub.4 alkyl, and C.sub.1 -C.sub.4 alkoxy; Y represents C.sub.2 -C.sub.7 alkylcarbonyl group, C.sub.2 -C.sub.7 alkoxycarbonyl group or cyano group; and R represents di (C.sub.1 -C.sub.4 alkylamino) group, morpholino group or piperidino group, are produced by reacting glyoxal sodium bisulfite adduct with amine compounds in the presence of acids and then with dithiolates. The dithiolane derivatives can activate liver functions and are effective for treatment and prophylaxis of hepatitis and other hepatic disorders.

Abstract: A cyclohexanedione derivative represented by the general formula (I); ##STR1## wherein R.sup.1, R.sup.4 and R.sup.7 represent independently hydrogen atom or C.sub.1 -C.sub.8 alkyl group, R.sup.2 represents hydrogen atom; C.sub.1 -C.sub.8 alkyl group; C.sub.2 -C.sub.6 alkenyl group; C.sub.3 -C.sub.8 cycloalkyl group; C.sub.2 -C.sub.7 alkoxycarbonyl group; C.sub.1 -C.sub.6 alkylthio C.sub.1 -C.sub.6 alkyl group; a phenyl group; a phenyl group substituted with 1 to 3 groups selected from the group consisting of halogen atom, C.sub.1 -C.sub.6 alkyl group, C.sub.1 -C.sub.6 haloalkyl group, C.sub.1 -C.sub.6 alkoxy group, C.sub.1 -C.sub.6 alkylthio group, C.sub.3 -C.sub.8 cycloalkoxy group, a benzyloxy group and a benzyloxy group substituted with C.sub.1 -C.sub.6 alkoxy group; naphthyl group or a heterocyclic group, R.sup.3 represents hydrogen atom, C.sub.1 -C.sub.8 alkyl group or C.sub.2 -C.sub.7 alkoxycarbonyl group, and R.sup.5 and R.sup.6, which may be the same or different, represent hydrogen atom, C.sub.1 -C.

Abstract: This invention relates to a malonic acid derivative represented by the general formula (I) ##STR1## wherein R.sup.1 and R.sup.2, which may be the same or different, represents hydrogen atom; C.sub.1 -C.sub.12 alkyl group; C.sub.1 -C.sub.8 alkyl group substituted with C.sub.1 -C.sub.5 alkoxy group, a tetrahydrofuryl group, a phenyl group or a phenyl group substituted with 1 to 3 groups selected from the group consisting of halogen atoms, C.sub.1 -C.sub.5 alkyl groups and C.sub.1 -C.sub.5 alkoxy groups; or C.sub.2 -C.sub.6 alkenyl group; R.sup.3 and R.sup.4, which may be the same or different, represent hydrogen atom, C.sub.1 -C.sub.6 alkyl group, C.sub.2 -C.sub.6 alkenyl group, C.sub.2 -C.sub.8 alkoxyalkyl group, benzoyl group, C.sub.2 -C.sub.8 alkylcarbonyl group, C.sub.2 -C.sub.8 alkoxycarbonyl group, C.sub.1 -C.sub.4 alkylsulfonyl group or aralkyl group including benzyl group, and R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, represent hydrogen atom or C.sub.1 -C.sub.

Abstract: A device for rethreading and cleaning threaded pipe studs having an elongated casing having an outside surface provided with flat portions for attaching to a torquing means, which casing is provided with a straight channel therethrough shaped to allow passage of the pipe stud with at least a portion of the channel sidewalls having an inside diameter slightly larger than the outside diameter of the pipe studs, and having multiple threading dies attached to the channel sidewalls at one open end with the teeth protruding perpendicularly from the channel sidewalls, wherein the teeth on each threading die projects consecutively shallower into the channel as they progress from the open end.