Abstract: An apparatus and method for quantitatively providing food material, in particular, a low fluid food material is provided. In the apparatus, the material is propelled by propelling means into a space at the bottom of the hopper. In this space, the density of the material is made uniform. The material is then introduced into a chamber. A piston with a receding underside reciprocates in the chamber, and presses the material in the passage of the chamber into a mold opening, and shapes it into a desired form. By ejecting the material from the opening, the same amount of the shaped material is provided.

Abstract: An apparatus for supplying a uniform amount of a loose food material comprising a hopper, a rotating drum and a pushing mechanism. In the apparatus, the material is introduced in pockets on the periphery of the drum and then compressed by a piston mechanism into a solid or cohesive form by pushing it, together with an additional amount of the material, against the piston provided in each of the pockets. Then the material, as shaped into a form, is discharged from the pocket onto a dough sheet. The material is compressed to a high density and a uniform shape.

Abstract: The present invention relates to a process for producing .alpha.-aspartyl-phenylalanine ester represented by the general formula ##STR1## wherein R' represents an alkyl group having 1 to 4 carbon atoms, by reducing an N-protected-N-hydroxymethyl-.alpha.-aspartyl-phenylalanine ester represented by the general formula ##STR2## wherein R represents an organic mioety which can be substituted reductively by hydrogen, and R' is as defined above, with hydrogen gas or formic acid, in the presence of a reduction catalyst and an aromatic primary amine. According to the present invention, there can be obtained a high purity .alpha.-aspartyl-phenylalanine ester with a high yield.

Abstract: This invention relates to a process for producing optically active valine, characterized by optically resolving DL-valine hydrochloride in a solvent containing an amine salt, a sulfonic acid or a carboxylic acid and isolating optically active valine after the decomposition of the obtained optically active valine hydrochloride.

Abstract: This invention relates to a process for producing optically active phenylalanine, characterized by optically resolving DL-phenylalanine.optically active mandelic acid complexes in an aqueous solvent in the presence of an acidic compound having a pKa value of 0.90 to 2.10 and isolating optically active phenylalanine from the obtained optically active phenylalanine.optically active mandelic acid complex.According to the process of the present invention, it is possible to decrease the amount of a mother liquor of resolution to 1/5 to 1/10 of that when no acidic compound is used and to obtain optically active phenylalanine having an optical purity of as high as 96.5% or above without a step of optical purification when optically active phenylalanine is isolated from the obtained optically active phenylalanine.optically active mandelic acid complex.

Abstract: The present invention relates to a process for preparing optically active phenylalanine which comprises resolving mixture of a complex of D-phenylalanine and optically active mandelic acid and a complex of L-phenylalanine and optically active mandelic acid in a solvent containing hydrochloric acid, carboxylic acid, phosphoric acid or a salt thereof to obtain the complex having lower solubility, and removing said optically active mandelic acid from the obtained complex to obtain an optically active phenylalanine.In the case of resolving DL-phenylalanine by the process according to the present invention, the amount of mother liquor used in resolution can be made to about 1/2 to 1/6 as compared to the amount of mother liquor of which the acidic compound or the salt thereof is not used in the resolution. Accordingly, the process according to the present invention is extremely profitable as an industrial process for producing an optically active phenylalanine.

Abstract: A thermosensitive fuse includes a cylindrical metallic casing having one end closed and the other end opened. The closed end of the casing is connected with a first conductor that extends outwardly from the casing and the opened end is fittingly mounted with a bushing carrying a second conductor. One end of the second conductor projects into the casing and the other end extends outwardly from the casing. Provided in the casing are an organic substance of solid state from the bottom of the casing to an intermediate level thereof, a contact member of slanted cylinder having a diameter smaller than the inner diameter of the casing, a first spring extending between the organic substance and one end of the contact member in a compressed manner, and a second spring, which is weaker than the first spring, extending between the projected end of the conductor and the other end of the contact member in a compressed manner.

Abstract: An improved quartz crystal wristwatch having an analog display and a reduced thickness is provided. The wristwatch includes a battery for powering a circuit and driving coil of a step motor for operating a gear train which are all arranged on a main plate so as not to overlap in plan view. The battery is disposed adjacent to a winding stem which is provided in the longitudinal direction of a diameter or line bisecting the main plate. A center wheel bridge is mounted on the main plate and a pillar-shaped member having a tubular region and a perpendicular disc-shape region is mounted in an opening in the center wheel bridge for supporting the cannon pinion which passes through the main plate about the tubular portion of the pillar-shaped member.

Abstract: This invention relates to a semiconductor substrate and a method of manufacturing the same. In a semiconductor manufacturing process for a Si single crystal wafer or the like, before the step of mirror polishing, the rear surface of a Si wafer is ground to form a damaged layer having a certain fixed thickness, the Si wafer is subsequently etched by chemical etching if desired, and the rear surface is further formed with an oxide film by thermal oxidation if desired, whereby a semiconductor substrate exhibiting an intense gettering effect is manufactured.

Abstract: This disclosure relates to a heat fuse for use in electrical and electronic equipment in which a contact plate having a diameter smaller than the internal diameter of a metallic casing is adapted to positively contact under pressure the inner peripheral surface of the metallic casing by the component force produced at the forward end of a second compression spring and applied in a direction perpendicular to the direction of the compression force. The contact plate can be pressed against the peripheral inner surface of the metallic casing with a sufficiently large contact pressure by the component force of the second compression spring, while the friction caused by the sliding movement of the contact plate with respect to the casing during functioning is extremely small owing to the diameter of the contact plate made smaller than the internal diameter of the metallic casing.

Abstract: Two optically active amino acid-mandelic acid complexes are obtained by interacting in a solvent under pH conditions of 1.0-4.0 an amino acid expressed by a general formula ##STR1## (in which R represents a methyl group, an ethyl group or a methylthioethyl group) and mandelic acid, one of the acids being an optically active substance and the other being a racemic modification, and optically resolving the resulting complexes into two diastereoisomers by using solubility difference therebetween. The optically active complexes are each decomposed by means of an acid, a strongly acidic ion-exchange resin, or a weakly basis ion-exchange resin to obtain optically active amino acids or optically active mandelic acid.

Abstract: Two optically active amino acid-mandelic acid complexes are obtained by reacting in a solvent under pH conditions of 1.0-4.0, an amino acid expressed by a general formula ##STR1## (in which R represents a methyl group, an ethyl group or a methylthioethyl group) and mandelic acid, one of the acids being an optically active substance and the other being a racemic modification, and optically resolving the resulting complexes into two diastereomers by using a solubility difference therebetween. The optically active complexes are each decomposed by means of an acid, a strongly acidic ion-exchange resin, or a weakly basic ion-exchange resin to obtain optically active amino acids or optically active mandelic acid.

Abstract: DL- .alpha.-phenylglycine can be combined with benzene-sulfonic acid, p-ethylbenzenesulfonic acid or m-xylenesulfonic acid to give the salt. The salt of the racemate may be more soluble in a sulfuric acid solution than the salt of the optically active isomer by suitably choosing the concentration of the sulfuric acid solution, and then the optical resolution by fractional crystallization is carried out. The D- or L- .alpha.-phenylglycine sulfonate is easily liberated of the sulfonic acid portion to give optically active D- or L- .alpha.-phenylglycine.

Abstract: Optically active p-hydroxyphenylglycine is prepared by reacting a racemic compound of a specified p-hydroxyphenylglycine derivative with optically active .alpha.-phenylethylamine to form a corresponding salt, obtaining two types of optically active salts therefrom by fractional crystallization, and obtaining optically active p-hydroxyphenylglycine by decomposition and hydrolysis of at least one of the optically active salts.

Abstract: Optically active p-hydroxyphenylglycine is manufactured by inoculating a supersaturated solution of a p-hydroxyphenylglycine sulfonic acid derivative salt comprising a mixture of the two optically active enantiomers of said salt with an optically active enantiomer of the same salt, said mixture being either racemic or else one in which the predominant enantiomer is that of the inoculant. In this manner the enantiomer having the form of the inoculant is selectively crystallized. The selectively crystallized salt is thereafter treated for removal of the sulfonic acid derivative.

Abstract: To suck and discharge the air into and from a pressure reducing chamber of a vacuum pump, a check valve comprises a valve body made of plastic material in a mushroom configuration, and a plate member which includes a flat valve seat surface to be engaged with the annular rim of the cap portion of the valve body, an assembling hole to be coupled with the neck portion of the valve body, and a plurality of openings positioned symmetrically on a circle concentric with the assembling hole to normally be closed by the cap portion of the valve body. The neck portion of the valve body is assembled with the assembling hole under axially and radially compressed condition to air-tightly engage the annular rim of the cap portion of the valve body on the valve seat surface.