摘要:
A safety protection device for the roof construction of a train body assembly comprises two arch bridge shaped transverse walking boards and a safety rope, wherein the safety rope is fixed between the span of the two arch bridge shaped transverse walking boards. The invention has the following benefit effects: the safety for the worker walking and working on the roof can be guaranteed since the worker walks up to the roof through the arch bridge shaped transverse walking boards and ties the other end of a safety belt which is tied on him to the safety rope.
摘要:
Disclosed herein is energy transfer on multisegmented nanowires via surface plasmon resonance excitation of visible light, such as solar energy, absorbed by metals sensitive to visible light and transferred to metals insensitive to visible light. The nanowires are prepared with controllable gap sizes between different segments by on-wire lithography (OWL).
摘要:
The utility model provides a combined positioning device for a side beam of a stainless steel car roof, comprising an inner cavity positioning block (2), an external support body (3), an external positioning block (4), a push rod (5), and clamps (6), a top side of the inner cavity positioning block (2) fits in with a top inner portion of the side beam (7) of the car roof, the external support body (3) is adjustably connected to a surface of the inner cavity positioning block (2), the external positioning block (4) is adjustably connected to a surface of the external support body (3), an elongated nut of the push rod (5) is integrated with the inner cavity positioning block (2), and the clamps (6) are used to clamp two edges of the side beam (7) of the car roof. With the present utility model, the side beam of the car roof can be supported by fitting the inner cavity positioning block in with the top inner portion of the side beam of the car roof, and sizes such as width and height can be adjusted through adjustments of the external support body connected to the inner cavity positioning block, the external positioning block and the clamps.
摘要:
The utility model provides a combined positioning device for a side beam of a stainless steel car roof, comprising an inner cavity positioning block (2), an external support body (3), an external positioning block (4), a push rod (5), and clamps (6), a top side of the inner cavity positioning block (2) fits in with a top inner portion of the side beam (7) of the car roof, the external support body (3) is adjustably connected to a surface of the inner cavity positioning block (2), the external positioning block (4) is adjustably connected to a surface of the external support body (3), an elongated nut of the push rod (5) is integrated with the inner cavity positioning block (2), and the clamps (6) are used to clamp two edges of the side beam (7) of the car roof. With the present utility model, the side beam of the car roof can be supported by fitting the inner cavity positioning block in with the top inner portion of the side beam of the car roof, and sizes such as width and height can be adjusted through adjustments of the external support body connected to the inner cavity positioning is block, the external positioning block and the clamps.
摘要:
The utility model provides an apparatus for correcting upwarp deformation of a large member of a stainless steel car roof, being characterized in that, it has a crossbeam, end support columns, a middle support column, an arc-shaped positioning body, crossbeam pull rings, a thin steel taut strap, and tighteners. The end support columns, crossbeam, and middle support column constitute a supporting part, the arc-shaped positioning body having the same arc shape as an inner arc of the large member of the stainless steel car roof is arranged on the middle support column. The thin steel taut strap covers an exterior contour surface of the large member of the stainless steel car roof, and is connected via the tightener to the crossbeam pull rings respectively fixed at two ends of the crossbeam.
摘要:
The utility model provides an apparatus for correcting upwarp deformation of a large member (11) of a stainless steel car roof, being characterized in that, comprising a crossbeam (1), end support columns (2), a middle support column (3), an arc-shaped positioning body (5), crossbeam pull rings (7), a thin steel taut strap (8), and tighteners (9), the end support columns (2), the crossbeam (1), and the middle support column (3) constitute a supporting part, the arc-shaped positioning body having the same arc shape as an inner arc of the large member of the stainless steel car roof is arranged on the middle support column (3), the thin steel taut strap (8) covers an exterior contour surface of the large member (11) of the stainless steel car roof, and is connected via the tightener (9) to the crossbeam pull rings (7) respectively fixed at two ends of the crossbeam (1). The apparatus can solve the problem of upwarp deformation of the large member of the stainless steel car roof, and restore the arc shape of the car roof and the car width.
摘要:
Disclosed herein are asymmetrically functionalized nanoparticles. Further disclosed herein are methods of preparing asymmetrically functionalized nanoparticles. Asymmetrically functionalized nanoparticles can be used in various therapeutic methods.
摘要:
The invention provides methods for screening a compound for its effect on endonuclease activity. The methods comprise providing a compound to be screened utilizing a gold nanoparticle aggregate as the substrate for the endonuclease. The gold nanoparticle aggregate is formed by the hybridization of oligonucleotides attached to the nanoparticles, with or without the presence of a third linker oligonucleotide. The hybridized oligonucleotide duplex serves as a substrate for the endonuclease. A detectable change is brought about in the presence of the endonuclease activity. A decrease in the detectable change reflects the reduced levels of endonuclease activities as a result of the effects of endonuclease inhibitors. The present invention also provides kits for screening an endonuclease inhibitor.
摘要:
A cell freeze-drying system, comprising: a temperature-elevated nitrogen supplier, a freeze-drying operation box, and a gas discharger, which are connected in that order using a first connection pipe. The temperature-elevated nitrogen supplier supplies warmed nitrogen to the freeze-drying operation box. A cell sample frozen by liquid nitrogen is placed in the freeze-drying operation box, and then the freeze-drying operation box, which is preset to a temperature suitable for placing the cell sample frozen by liquid nitrogen, is warmed up in a preset mode while continuously being supplied with the warmed nitrogen to sublimate solid state water in the cell sample into gaseous water. The gas discharger is used to discharge the gaseous nitrogen and the gaseous water. Further disclosed is a cell freeze-drying method. The invention can effectively address an issue of cell damage and contamination during freeze-drying, and realizes safety, efficiency, and low costs for cell freeze-drying.