Abstract: The quick mounting structure includes a first connector, a second connector, and a self-locking mechanism; the self-locking mechanism is on the second connector, and the first connector is connected to the second connector through the self-locking mechanism; the self-locking mechanism includes a quick mounting block, a transmission arm, a locking block, a rotating shaft, and a first elastic member; the quick mounting block is connected to the first connector; the second connector is provided with a quick mounting groove, and all of the transmission arm, the locking block, the rotating shaft, and the first elastic member are arranged in the quick mounting groove; the transmission arm is rotationally connected to the second connector through the rotating shaft; the first elastic member is connected to the transmission arm or the locking block for enabling the locking block to be in a locked state in a normal state.

Abstract: The quick mounting structure includes a first connector, a second connector, and a self-locking mechanism; the self-locking mechanism is on the second connector, and the first connector is connected to the second connector through the self-locking mechanism; the self-locking mechanism includes a quick mounting block, a transmission arm, a locking block, a rotating shaft, and a first elastic member; the quick mounting block is connected to the first connector; the second connector is provided with a quick mounting groove, and all of the transmission arm, the locking block, the rotating shaft, and the first elastic member are arranged in the quick mounting groove; the transmission arm is rotationally connected to the second connector through the rotating shaft; the first elastic member is connected to the transmission arm or the locking block for enabling the locking block to be in a locked state in a normal state.

Abstract: The present invention provides for novel fucosidase mutants that server as fuco-ligases for core fucosylation of a range of biological glycopeptides and glycoproteins including intact therapeutic antibodies. Several mutants with mutation at the general acid/base residue E274 of the Lactobacillus casei ?1,6-fucosidase, including E274A, E274S, and E274G, were able to efficiently fucosylate a wide variety of complex N-glycopeptides and intact glycoproteins. The site specific mutants enable the transfer of fucose to a core GlcNAc-Asn residue and useful for drug delivery and vaccine development.

Abstract: Disclosed are a child sitting saddle and a child stroller, the child sitting saddle comprises an enclosure frame assembly, a plug connector, a seat rod assembly and a cloth cover including a seat cloth cover and a backrest cloth cover; the child sitting saddle further comprises a first lock mechanism for locking the enclosure frame assembly with the plug connector, a connecting rod and a second lock mechanism disposed between the seat rod assembly and the connecting rod; when in a chair state, the seat rod assembly obliquely intersects with the backrest cloth cover; when in a sleeping basket state, the seat rod assembly, the seat cloth cover and the backrest cloth cover are all disposed horizontally. The child sitting saddle can be converted between the chair state and the sleeping basket state, and the conversion is convenient.

Abstract: Disclosed are a child sitting saddle and a child stroller, the child sitting saddle comprises an enclosure frame assembly, a plug connector, a seat rod assembly and a cloth cover including a seat cloth cover and a backrest cloth cover; the child sitting saddle further comprises a first lock mechanism for locking the enclosure frame assembly with the plug connector, a connecting rod and a second lock mechanism disposed between the seat rod assembly and the connecting rod; when in a chair state, the seat rod assembly obliquely intersects with the backrest cloth cover; when in a sleeping basket state, and the seat rod assembly, the seat cloth cover and the backrest cloth cover are all disposed horizontally. The child sitting saddle can be converted between the chair state and the sleeping basket state, and the conversion is convenient.

Abstract: The present invention provides for novel fucosidase mutants that server as fuco-ligases for core fucosylation of a range of biological glycopeptides and glycoproteins including intact therapeutic antibodies. Several mutants with mutation at the general acid/base residue E274 of the Lactobacillus casei ?1,6-fucosidase, including E274A, E274S, and E274G, were able to efficiently fucosylate a wide variety of complex N-glycopeptides and intact glycoproteins. The site specific mutants enable the transfer of fucose to a core GlcNAc-Asn residue and useful for drug delivery and vaccine development.

Abstract: A logging device and method for locating a watered zone in a horizontal well with high watercut problem by isotope labeling is provided. The method successively includes the following operations: a. solidifying an isotope used in an isotope releasing device into a water-soluble carrier; b. connecting the isotope releasing device with a tubing and setting them to a horizontal segment of the well; c. dissolving the water-soluble carriers in the water at the bottom of the well to release the isotope, wherein the releasing rate is proportional to the flow rate of the water; d. starting a lift-up pump and beginning a production logging; and e. continuously performing ?-ray energy-spectrum analysis on produced water on the ground, so as to locate the watered zone of the horizontal well by the detected species and characteristic content of the isotope, thereby reduces operation risk, saves platform occupying time and logging cost.

Abstract: An logging method for locating a watered zone in a horizontal well with high watercut problem by isotope labeling is disclosed, which successively includes the following steps: a. solidifying an isotope used in an isotope releasing device into a water-soluble carrier; b. connecting the isotope releasing device with a tubing and setting them to a horizontal segment of the well; c. dissolving the water-soluble carriers in the water at the bottom of the well to release the isotope, wherein the releasing rate is proportional to the flow rate of the water; d. starting a lift-up pump and beginning a production logging; and e. continuously performing y-ray energy-spectrum analysis on produced water on the ground, so as to locate the watered zone of the horizontal well with high watercut problem by the detected species and characteristic content of the isotope.