Abstract: A polarizing beam splitter extracts orthogonally polarized light beams from natural light and distributes those to liquid crystal panels, which modulate polarization states of those polarized light beams in accordance with a luminance signal and chrominance signals of video signals, respectively. The modulated light beams are combined by the same polarizing beam splitter, and the combined light is enlarged and projected onto a screen by a projection lens, to reproduce a projected image.

Abstract: A novel compound of the formula:A--Z--Ar.sup.1 1'CO--Ar.sup.2wherein A is a condensed pyrimidinone or condensed pyridazinone ring; Ar.sup.1 and Ar.sup.2 are independently a ring; Z is a divalent group, or a salt thereof which have an excellent antitumor activity.

Abstract: A condensed pyrimidine derivative of the formula (I): ##STR1## wherein the ring A stands for an optionally substituted 5-membered ring; B stands for an optionally substituted divalent 5- or 6-membered homo- or hetero-cyclic group; X stands for, among others, amino group; Y stands for, among others, hydrogen atom, halogen atom or amino group; Z stands for a divalent aliphatic group having five or less atoms forming straight chain, optionally having nitrogen, whose chain portion may optionally have a hetero-atom; W stands for, among others, --NH--CO-- or --CO--NH--; R.sup.1 stands for an optionally substituted cyclic or chain-like group; COOR.sup.2 stands for an optionally esterified carboxyl group; and p denotes an integer of 1 to 4, provided that when --W--R.sup.1 denotes a moiety represented by the formula: ##STR2## wherein COOR.sup.16 and COOR.sup.

Abstract: Apparatus for removing an acidic component from a gas comprising two absorption columns for washing a crude gas by using two concentrations of alkali-containing aqueous solutions. The alkali-containing solution used in the first step has a pH of 6-13 and the solution used in the second step has a 0.3-2.5 N concentration. A specific gravity control device is used to control the concentration of the solution circulated for the second step. A pH control device is used to control the pH of the solution circulated for the first step. The pH control device controls a valve which regulates the addition of the second step solution into the tank of the first step solution as needed.

Abstract: Each of a transmitter and a receiver connected to an antenna through a duplexer includes a .pi./2 and a .pi. polarizer and an ortho-mode transducer (OMT) serially interconnected. In the receiver the OMT is connected at one output to a branching circuit and at the other output to a coupler which is connected to the branching circuit through a transfer circuit. In the transmitter, the OMT is connected at one input to a branching circuit and at the other input to a coupler subsequently connected to the branching circuit through a transfer circuit.

Abstract: Disclosed is a novel photosensitive composition comprising an alkali-soluble photosensitive resin and an additive consisting of at least one aromatic polybasic carboxylic cellulose ether ester which is a reaction product of an aromatic polybasic carboxylic anhydride with a cellulose ether compound of the formula (I) or (II):R.sub.a.sup.1 R.sub.b.sup.2 A (I)orR.sub.c.sup.3 R.sub.d.sup.4 R.sub.e.sup.5 A (II)wherein R.sup.1 represents a hydroxyalkyl radical having 3 or 4 carbon atoms; R.sup.2 and R.sup.5 are a hydrogen atom or an alkyl radical having 1 or 2 carbon atoms, respectively; R.sup.3 and R.sup.4 represent a hydroxyalkyl radical having 2 to 4 carbon atoms, respectively, and are different from each other; A represents a cellulose residue, and; a, b, c, d and e, respectively, represent a positive number.

Abstract: Disclosed is an alkali-soluble photosensitive composition having an excellent stability in photosensitivity and developing property over a long storage time and a high ink-sensitivity. The composition comprises an aromatic azido compound and a novolak resin prepared by condensation polymerizing, in the presence of an acid catalyst, formaldehyde, a phenol compound of the following formula (I) and another phenol compound or compounds of the following formula (II) and/or formula (III). ##STR1## wherein, R.sub.1 =H or -CH.sub.3, R.sub.2 =alkyl of 3-15 carbon atoms, phenyl or cyclohexyl, and R.sub.3 and R.sub.4 =alkyl of 1-3 carbon atoms.