4results about How to "Normal development" patented technology

The application discloses a method for artificially breeding Japanese scomber and application, and belongs to the technical field of artificial fish breeding. The method comprises the steps of parent cultivation, parent induced delivery, fertilized egg collection and hatching, and artificial breeding, 186 sexually mature Japanese scomber parent fishes are successfully cultivated, more than 300,000 fertilized eggs are obtained through natural spawning, 229,000 fry are hatched, after 20 days of cultivation, the average total length of the fry reaches 3.45 cm, the average weight is 0.33 g, the fry develops normally, and the feeding is good. The application has carried out in-depth research on the breeding habit of Japanese scomber, overcomes the problems of few Japanese scomber parent fishes, strong stress response and difficult transportation, and simultaneously masters the best induced delivery dose of artificial breeding of Japanese scomber, required water temperature and other environmental conditions, fertilized egg hatching conditions and artificial breeding technology and the like.

The utility model discloses a high temperature and high pressure oil pipe patching device belongs to the technical field of oil exploitation, including multiple high temperature and high pressure sealing mechanism and multiple high temperature and low pressure sealing mechanism, multiple high temperature and high pressure sealing mechanism between the adjacent two high temperature and high pressure sealing mechanism is equipped with the shaft sleeve, the slip sleeve is connected with the outer cylinder through several shearing nails, be equipped with the retreat prevention mechanism in the outer cylinder, and the retreat prevention mechanism is covered on the slip sleeve, the slip is located in the outer cylinder, and the upper end of slip is connected with the lower end of the reversing mechanism, and the slip is located the upside of slip sleeve. Set up multiple high temperature and high pressure sealing mechanism in the oil pipe patching device, and utilize the retreat prevention mechanism to prevent the slip sleeve from moving up relative to the outer cylinder, reduce the risk of all high temperature and high pressure sealing mechanism failure simultaneously, guarantee the oil production efficiency while guaranteeing that oil production work can develop normally, the sealing element adopts the high temperature resistant material to make, improved the high temperature resistant performance of oil pipe patching device.

The utility model discloses a kind of egg frame bearing mechanisms that can swing, including bearing assembly, multiple bearing assemblies are connected by multiple connecting plates with array distribution, multiple bearing assemblies are rotationally arranged on the pivot, and bearing assembly includes octagon frame, multiple supporting plates are arranged with equal intervals in octagon frame, and the top surface of both ends of supporting plate is fixedly connected with stop block, and supporting plate is provided with detachable locking assembly to limit egg frame. By placing multiple egg frames in turn on the supporting plate of the same height of adjacent octagon frame, and using locking assembly to limit the outermost egg frame, so that multiple egg frames are close to each other, multiple egg frames are limited between stop block and locking assembly, intermittent reciprocating rotation of multiple bearing assemblies is driven by the pivot, and egg frame reciprocates with bearing assembly, so that each egg is evenly turned, embryo tissue and eggshell endoderm are prevented from adhering, embryo development is normal, and hatching rate and gosling quality are improved.

This invention discloses a starch grain development-related gene, OsESG2, and its applications. The nucleotide sequence of the gene OsESG2 provided by this invention is shown in SEQ ID NO.1 or SEQ ID NO.2. Introducing the encoding gene OsESG2 into plants with abnormal starch grain development can cultivate plants with normal starch grain development. The gene and its encoded protein can be applied to crop genetic improvement.