Abstract: A permselective membrane comprising a thin permselective film of a polymeric material, said polymeric material being prepared by cross-linking a polyaddition product between a polyepoxy compound and a polyamino compound having at least two amino groups capable of reacting with epoxy groups with a polyfunctional compound selected from the group consisting of aromatic, heterocyclic and alicyclic compounds containing at least two functional groups selected from acid halide, sulfonyl halide, isocyanate and acid anhydride groups; and a process for producing the same. The permselective membrane of this invention is especially useful for desalination of saline or brackish water by reverse osmosis.

Abstract: A cutting control apparatus for cutting, by a rotary type flying cutter, a sheet, pipe or like material fed by a feeder. On the basis of a synchronous cutting length corresponding to setting of a blade speed change mechanism of the flying cutter and one of a travelling speed signal of the material and the revolving speed of a blade of the cutter, a reference speed signal is produced for the other of the material travelling speed and the blade revolving speed. One of a signal related to length-measuring pulses corresponding to the distance of travel of the material and a signal related to rotation pulses corresponding to the rotation of the blade is applied as an additive input to an adder, and the other is applied as a subtractive input to the adder.

Abstract: Phenylcyclopropane carboxylic acid derivatives having the formula ##STR1## wherein X represents hydrogen or a halogen atom, C.sub.1-5 alkyl group C.sub.1-5 alkoxy group, trifluoromethyl, cyclopropyl, tri-lower alkylsilyl, lower alkylthio or cyano group; Y represents hydrogen atom or cyano group; and R represents ##STR2## are novel compounds which are useful as insecticides and acaricides.

Abstract: A combined magnetic tape head having a recording head and a reproducing head disposed in a side by side relationship with a recessed wedge shaped area therebetween. A shielding plate is interposed between the heads to reduce cross feed therebetween. The top portion of the shielding plate is bent into L-shape so that the bent tip confronts the recording head. The remainder of the wedge shaped area is covered with a resin material, or an auxiliary plate can be positioned over the plate extending between the heads. In order to maintain the combined head free from dust accumulation, the top portion of the L-shaped shielding plate or the auxiliary plate is tapered so that it has a substantially trapezoidal cross-section with either straight or curved inclining sides.

Abstract: A process for manufacturing a highly concentrated sulfate solution or slurry which comprises neutralizing a sulfuric ester of higher alcohol or its ethoxylate with an aqueous caustic alkali solution, thereby preparing a crude neutralization product containing the sulfate in the range of from 45 wt. % to 55 wt. % and the caustic alkali in the range of from 1.5 wt. % to 3.5 wt. % and having a viscosity less than 50 poise; and commingling the resulting crude neutralization product with the sulfuric ester in the range of from 30 parts by weight to 100 parts by weight per 100 parts by weight of the crude neutralization product and a highly concentrated caustic alkali solution capable of sufficiently neutralizing the sulfuric ester, thereby reducing the quantity of sulfate contained in the resulting mixture in the range of from 60 wt. % to 75 wt. % and the quantity of caustic alkali contained therein less than 0.5 wt. % of the quantity of sulfate.

Abstract: An apparatus to control the air flow in an automobile comprises a box which is provided beneath a seat and has openings respectively formed in the upper wall and the front wall thereof, a fan which is mounted to the rear wall of the box and of which the rotation can be reversed, a switching plate which is provided in the box in such a way as to selectively close the opening formed in the upper wall and the opening formed in the front wall, and a means to drive the switching plate so as to selectively open either one of said openings in synchronism with the switching of the rotation of the fan, thereby the air is forcibly upwardly passed through the seat or the hot air from a heater or the cold air from a cooler provided in front of the seat is forcibly sent rearwardly through said box.

Abstract: A magnetic recording reproducing apparatus is made ready to operation by insertion thereto of a pack housing an endless recording medium. When a magnetic card is inserted into the apparatus with the pack inserted thereto, the contents, informations or data recorded on the magnetic card are read out and recorded on the endless recording medium and then the recorded contents, informations or data are reproduced from the endless recording medium. After passage of the magnetic card through the apparatus, the reproduction from the endless recording medium will repeatedly continue. When a magnetic card is inserted into the apparatus without any pack inserted thereto, a direct reproduction from the magnetic card is performed.

Abstract: A process and composition for producing a permselective composite membrane. The process comprises dissolving a specified imidazolone ring-containing aromatic polymer in an aqueous liquid medium containing a water-miscible amine having a pKa of more than 5.0 in a concentration of at least 5% by weight, coating the polymer solution on a microporous substrate, and drying the coating to form an ultrathin film on the substrate. The permselective composite membrane obtained is especially useful as a reverse osomsis membrane.

Abstract: An oral composition for caries prophylaxis which comprises 0.04 to 10% by weight of stannous fluoride and not less than 0.1% by weight of a phytic acid compound, the molar ratio of the phytic acid compound to stannous fluoride being in the range of from 0.01:1 to 4:1 and the composition being acidic, is effective in inhibiting dental caries and shows a prolonged effect after application. The oral composition may be used as mouthwashes, oral bands, topical solutions, cavity sealers, prophylactic pastes, dentifrices, dental flosses and the like.

Abstract: The imidazole derivatives of the general formula: ##STR1## wherein R.sup.1 represents a hydrogen atom, or a straight- or branched-chain alkyl group containing from 1 to 12 carbon atoms, the symbol .dbd. represents a double bond that bond is E or Z, or a triple bond, and m and n, which may be the same or different, each represent zero, or an integer of 1 to 10, and non-toxic acid addition salts thereof, and, when R.sup.1 represents a hydrogen atom, non-toxic salts thereof are new compounds. These compounds have a strong inhibitory effect on thromboxane synthetase from rabbit platelet microsomes, and are useful as therapeutically active agents for inflammation, hypertension, thrombus, cerebral apoplexy and asthma.

Abstract: Correlation between data in two adjacent scan lines is sensed. When the degree of correlation is above a predetermined value the data is compressed by means of two dimensional compression. When the degree of correlation is below the predetermined value the data is compressed by means of one dimensional compression. Typically, both the one and two dimensional compression systems are based on run length encoding. After a predetermined number of scan lines have been compressed by two dimensional compression, one scan line may be compressed by one dimensional compression to prevent accumulation of error.

Abstract: A compound of the formula: ##STR1## wherein R.sup.1 is hydrogen or methyl, is prepared by condensing a compound of the formula: ##STR2## wherein R.sup.2 is alkyl, aryl or aralkyl and R.sup.1 is same as above, or a reactive derivative thereof with 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid or an ester thereof to give a compound of the formula: ##STR3## wherein R.sup.3 is an ester residue and R.sup.1 and R.sup.2 are same as above, followed by hydrolysis or ammonolysis of said compound (IV). The compound (I) is useful as a diagnostic or therapeutic agent for angiotensin-related hypertension.

Abstract: A gas laser discharge tube comprises a discharge vessel containing a discharge gas, a rod-shaped anode, a corrugated cathode and a voltage source connected between the anode and cathode. The corrugated cathode comprises a metal hollow cylinder arranged coaxially with the optical axis of the laser and a plurality of metal discs arranged coaxially with the optical axis of the laser at regular intervals in the axial direction of the metal hollow cylinder. The discs have their peripheries secured to the inner periphery of the metal hollow cylinder. Each disc has a central hole and another hole through which the anode extends parallel to the optical axis of the laser.

Abstract: Phenylcyclopropane carboxylic acid derivatives having the formula (I) ##STR1## wherein X represents a C.sub.2 -C.sub.10 straight or branched alkyl group, are novel compounds having excellent acaricidal effect.

Abstract: A 2-aminomethyl phenol derivative of the formula (I): ##STR1## wherein X is a halogen atom; R.sup.1, R.sup.2, R.sup.3 and R.sup.4 which may be the same or different are each a hydrogen atom or a straight or branched chain alkyl group having 1 to 4 carbon atoms; n is 2, 3, 4 or 5 and a pharmaceutically acceptable acid addition salt thereof are disclosed. Also disclosed is a process for preparing such derivative or a pharmaceutically acceptable acid addition salt thereof.

Abstract: A varnish composition for offset printing inks, said composition comprising[A] 100 parts by weight of a resin having a softening point of at least 100.degree. C. and an acid value of 5 to 50, said resin being produced by reacting 100 parts by weight of (I) a hydrocarbon resin obtained by polymerizing (a) a 5-membered cyclic compound having a conjugated double bond and expressed by the following general formula ##STR1## wherein H represents hydrogen, R represents an alkyl group having 1 to 3 carbon atoms, m and n or 0 or an integer of at least 1, and m+n equals 6, and/or its Diels-Alder adduct, with 1 to 15 parts by weight of (b) an unsaturated carboxylic acid and/or its anhydride to form (II) an acid-modified resin, reacting the acid-modified resin (II) with 0.1 to 1.0 molar equivalent based on the acid groups in the acid-modified resin (II), or 0.2 to 2.

Abstract: Mode changing in a tape recorder/reproducer is effected by means of the tape drive motor and a cam driven linkage under the control of a solenoid, and the timing of the energization of the solenoid within the control cycle determines the mode of the recorder/reproducer which is established.