Abstract: A hybrid type image forming apparatus capable of forming a high quality image by using two image forming units having different resolution from each other, perform high throughput image forming by selecting most suitable image forming method or methods depending upon a kind of input image data, and reducing its running cost. In the apparatus, input image data of resolution of 300 dpi is separated into monochromatic image data and color image data. The monochromatic image data is converted into that of 600 dpi so that four pixels of an image of 600 dpi make one pixel of an image of 300 dpi. Then, a monochromatic image is formed on the basis of the monochromatic image data of 600 dpi by the image forming unit employing the electrophotograph method. A print medium on which the monochromatic image is formed is conveyed to the image forming unit employing the ink-jet printing method where a color image is formed on the basis of the color image data of 300 dpi.

Abstract: A scan optical apparatus is provided with a first light source for generating a beam for scan optically modulated based on an image signal, a second light source for generating a beam for jitter amount detection, a scanning device for deflecting the beams from the first light source and from the second light source to scan a surface to be scanned, an optical member disposed in the vicinity of the surface to be scanned or at a position substantially optically equivalent to the surface to be scanned, and a detecting device for detecting a beam reflected by the optical member and deflected by the scanning device. The optical member may have reflective portions and nonreflective portions which are repeatedly arranged in a main scan direction, or may be a corner cube array in which a plurality of corner cubes are arranged in the main scan direction. Further, the surface to be scanned may be a recording medium in a recording apparatus.

Abstract: The compound of the formula ##STR1## is disclosed to have a less rapid decrease in blood pressure in its use as an antihypertensive.

Abstract: An optical isomer having an optical rotation degree of (+) from among (.+-.)-.alpha.-2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dica rboxylic acid-3-(1-benzyl-3-piperidyl) ester-5-methyl ester, the hydrochloride of which has melting points ranging from 196.degree. to 202.degree. C.; or a salt thereof is described as being suitable for use in a pharmaceutical composition having hypotensive activity.

Abstract: A vasodilating or anti-hypertensive composition comprises a pharmaceutical carrier and an effective amount of a 1,4-dihydropyridine compound as an active ingredient. The 1,4-dihydropyridine compound may be represented by the following general formula: ##STR1## wherein R'.sub.1 and R'.sub.4 represent a hydrogen atom, R'.sub.2 and R'.sub.3 represent an alkyl group having 1-5 carbon atoms or a substituted heterocyclic group wherein a substituent is an N-benzylpiperidyl group, R'.sub.5 represents a nitro group, and R'.sub.6 and R'.sub.7 represent an alkyl group having 1-5 carbon atoms.

Abstract: An apparatus using microcomputing system for automatically setting the optimum performance characteristics of a magnetic tape used. When the type of a magnetic tape loaded into a tape recorder is detected, the microcomputing system sets the standard recording level and the standard recording bias level of the magnetic tape in a recording level setting circuit and a bias level setting circuit of the tape recorder, respectively. When an automatic setting instruction and a subsequent recording start instruction are issued, a test signal having a certain frequency range is recorded on the magnetic tape and reproduced therefrom. The reproduced test signal is then supplied to a level deviation detecting circuit which detects the level deviation between the test signal of a predetermined frequency and the reproduced test signal of the same frequency and the level deviation between components of the reproduced test signal which are of different frequency.

Abstract: Compounds having coronary and vasodilator effects, a hypotensive effect, and useful as antianginal drugs and drugs for treating hypertension are represented by the following general formula: ##STR1## wherein R.sub.1 and R.sub.2 are the same or different groups and each represents a lower alkyl group, one of R.sub.3 and R.sub.4 represents a lower alkyl group and the other represents a group of the general formula: ##STR2## wherein R.sub.5 represents an aralkyl group or an acyl group and n represents 0 or an integer of 1-3; the pharmaceutically acceptable acid addition salts thereof are also effective therapeutic compounds.

Abstract: A single magnetic head assembly having vertically stacked separate units of recording and playback cores is comprised of a first unit of at least one recording cores, and a second unit of at least one playback core which is located in stacked positional relationship relative to the first unit. These units of cores are arranged to be jointly shifted vertically to meet the required track of the magnetic tape when used, to thereby utilize that particular unit of cores optimum for recording or playback, as desired.