45 results about "Atresia" patented technology

A medical system for approximating the esophageal sacs in an infant afflicted with esophageal atresia. The medical device includes an esophageal catheter and a gastric catheter. The distal end of the esophageal catheter, which includes a magnetic tip, is passed through the esophagus to the upper esophageal sac. The distal end of the gastric catheter, which also includes a magnetic tip, is passed through a gastrostomy and into the lower esophageal sac. The magnetic forces created by both magnets results in approximation of the esophageal sacs. Pressure-induced necrosis establishes a passageway between the esophageal sacs. A stent or stent-graft can be deployed within the established passageway to prevent re-synopsis of the esophagus.

Nucleic acid compositions encoding a pro-apoptotic protein, Bok (Bcl-2-related ovarian killer) are identified. Bok has conserved Bcl-2 homology domains 1, 2 and 3 and a C-terminal transmembrane region present in other Bcl-2 related proteins, but lacks the BH4 domain found only in anti-apoptotic Bcl-2 proteins. Over-expression of Bok induces apoptosis. Cell killing induced by Bok is suppressed by co-expression with selective anti-apoptotic Bcl-2 proteins. Bok is highly expressed in the ovary, testis and uterus, particularly in granulosa cells, the cell type that undergoes apoptosis during follicle atresia. Identification of Bok as a new pro-apoptotic protein with wide tissue distribution and hetero-dimerization properties facilitates elucidation of apoptosis mechanisms in reproductive and other tissues, and provides a means for manipulating apoptosis.

The invention is a single-circuit DC large-signal modulation controller based on ping-pong control and a control method thereof. The single-loop DC large-signal modulation controller based on ping-pong control includes a sampling controller (S1), a differential controller (S2), a power controller (S3), a power limiter (S4) and a power converter (S5). The present invention can realize real-time on-line monitoring of the running state of the AC-DC transmission system. When serious AC faults or other faults such as single-circuit DC bipolar blocking occur, the DC controller can quickly judge the stability of the system and formulate a large DC signal according to the degree of stability. The modulation strategy, real-time and fast emergency modulation of DC power, effectively controls the power balance relationship between regions during the swinging process of the generator group, and plays a role in suppressing the swing of the power angle and improving the stability limit.

The invention discloses a small rkatsiteli fryer three-line matched seed production method, which comprises the following steps: (1) hybride the egg-type Rhode Island red male parent with the Rhode Island white female parent and raise by atresia pedigree to select the individuals that have fast feather and silver feather as the first female parent, and the genotype is shown in the description male Z(ks)Z(ks), female Z(ks)W; (2) take domestic or local kind as the material and raise by atresia pedigree to form a first male parent that has a slow feather and takes the gold feather gene, wherein the genotype is shown in the description male Z(Ks)Z(Ks), female Z(Ks)W; (3) takes the introduced fast-feather rkatsiteli broiler breeder as the final male parent that is shown in the description male Z(k)Z(k), female Z(k)W; (4) hybride the first male parent and the first female parent to generate F1 generation hen, then hybride the F1 generation hen with the final male parent to get the small rkatsiteli fryer. The small rkatsiteli fryer parents generation chicken can provide a lot chicks in low cost, and the goods generation chicken have a strong disease resistance and a significant integrated benefit.

The invention discloses an unlocking device for a locked coal mine air door, and belongs to the technical field of coal mine ventilation safety. The unlocking device is connected with a interlocking device to be used. The interlocking device is connected with the air door after a steel wire rope is guided through a guiding pulley. The unlocking device comprises a base, a pin and a rotation handle. The base comprises a steel fixing piece and a positioning block. A through hole is formed in the steel fixing piece. The positioning block is provided with a shaft hole. The positioning block is arranged on an air door plate and located below the steel fixing piece. The pin comprise a pin shaft and a lock pin, one end of the lock pin is of an annular structure, the other end of the lock pin is connected with the steel wire rope, and the pin shaft penetrates the through hole of the steel fixing piece, the annular structure and the shaft hole. The rotation handle comprises a first handle body, a second handle body and special-shaped pins, wherein the first handle body and the second handle body are arranged on the air door plate through the special-shaped pins, and the first handle body is pressed and attached to the steel fixing piece through the lock pin. By means of the unlocking device, the hidden danger that due to the fault of a steel wire rope interlocking device, people cannot safely pass is avoided, and a reliable guarantee is provided for a coal mine safety channel.

An esophageal atresia bridge device including a proximal anchor, a distal anchor, and a brace extending between the proximal anchor and the distal anchor. The brace permits the proximal anchor to move toward the distal anchor to apply a controlled tension that pulls the esophagus together and stretches the esophagus over time.

The invention dislcoses application of crocetin in preparation of a drug or a health care product for preventing and treating polycystic ovarian syndrome. On the basis of the existing effects of the crocetin, a foetal period dihydrotestosterone-induced polycystic ovarian syndrome mouse model is adopted to deeply research therapeutic action of the crocetin. Results show that the crocetin can remarkably relieve estrous cycle dysrhythmia of a polycystic ovarian syndrome model mouse, reduce ovary weight and an atresia ovary amount, increasing amounts of corpora lutea big antral follicles and follicles before ovulation, and remarkably improve levels of estradiol, luteinizing hormone, follicle-stimulating hormone, progesterone and testosterone of the polycystic ovarian syndrome model mouse, andhas a good effect of treating the polycystic ovarian syndrome. Moreover, in an experiment process, obviously untoward effects do not appear, and the safety is high.