Abstract: The present invention provides a gene expression regulatory DNA and a process for preparing a protein using the same.A DNA derived from the isocitrate lyase (ICL) gene of a coryneform bacterium regulates expression of a structural gene encoding a protein when incorporated into a vector DNA together with said structural gene and introduced into a host coryneform bacterium, and a useful protein can be efficiently produced using the DNA.

Abstract: A welding torch (4) of a welding robot (RO) is supported by arms (2, 3), to be movable under control by a computer (7). When first and second members (W1, W2) are welded by a weld woven across an interspace between them while oscillating a welding torch (4) along a weld line (WL). Data on changes in the interspace between the first and second welded member (W1, W2) along direction of the weld line (WL) are previously stored in advance to welding. During the welding, the computer 7 performs arithmetic to obtain command values on the basis of the data to output the same to the welding robot (RO), so that the welding robot (RO) performs weaving in accordance with the command values while varying a weaving amplitude of the welding torch (4) in response to the change in the interspace. Changes in the direction in which the welding torch is moved to weave the weld are determined by detecting the actual value of the welding current and reversing direction when the detected value exceeds a prescribed threshold value.

Abstract: A welding torch (4) of a welding robot (RO) is supported by arms (2, 3), to be movable under control by a computer (7). When first and second welded numbers (W1, W2) are woven while oscillating a welding torch (4) along a weld line (WL), data on change in an interspace between the first and second welded members (W1, W2) along direction of the weld line (WL) are previously stored in advance to welding. In the welding, the computer 7 performs arithmetic to obtain command values on the basis of the said data to output the same to the welding robot (RO), so that the welding robot (RO) performs weaving in accordance with the command values while varying a weaving amplitude of the welding torch (4) in response to the change in said interspace.

Abstract: A welding torch (4) of a welding robot (RO) is supported by arms (2, 3), to be movable under the control of a computer (7). First and second members (W1, W2) are welded by a mold woven while oscillating an welding torch (4) along a weld line (WL), with data on changes in an interspace between the first and second welded members (W1, W2) along a direction of the weld line (WL) being previously obtained and stored in advance of welding. For the welding, the computer 7 performs arithmetic to obtain command values on the basis of the stored data to output the same to the welding robot (RO), so that the welding robot (RO) performs weaving in accordance with the command values while varying a weaving amplitude of the welding torch (4) in response to the change in the interspace.

Abstract: A color cathode ray tube comprises a first fluorescent part on a part of an inner surface of a face plate and said first fluorescent part imparting a luminescence of a predetermining reference white color by irradiation of electron beams; a second fluorescent part on the remained part of the face plate and said second fluorescent part imparting red, green and blue fluorescent dots or stripes wherein the first fluorescent part for the reference white color is formed by a mixture or tricolor fluorescent materials for the second fluorescent part or a mixture of tricolor fluorescent materials which imparts a luminous spectrum being similar to that of the tricolor fluorescent materials for the second fluorescent part.