Shenzhen Sist Technology Co,. Ltd

Lifetech Scientific (shenzhen) Co., Ltd

Bontac Bio-engineering (shenzhen) Co., Ltd

Konka Group Co., Ltd.

Japan L&l Skin Tech Co., Limited

Shenzhen Lifetech Endovascular Medical Co., Ltd.

Exa Energy Technology Co., Ltd.

Lifetech Scientific Co., Ltd.

Qin Wang

Benhao Xiao

Qi Zhang

Hui Wang

Hui Zhang

Feng Yang

Haojie Xu

Xiaoyong Wang

Zhang Zhang

Chunmeng Ye

Guiping Zhang

Minqiang Lin

Chunwei Tang

Yongliang Guo

Yonghui Xie

Zhixin Tang

Neck massage device

The invention relates to a method for preparing nicotinamide mononucleotide by using nicotinamide as a raw material, which comprises: in acetonitrile, dichloromethane, 1,2-dichloroethane or liquid sulfur dioxide as a solvent, allowing nicotinamide and tetraacetyl ribose to react as catalyzed by trimethylsilyl trifluoromethanesulfonate or tin tetrachloride, adjusting a pH value thereof to 3-5, adding a sodium methoxide solution thereto to react at −15° C. to 5° C., adjusting a pH value thereof to 3-5, and subjecting the reaction mixture to microfiltration and nanofiltration using a membrane concentrator, thereby obtain a nicotinamide ribose solution; allowing the nicotinamide ribose solution to react as catalyzed by nicotinamide ribokinase in the presence of Mg ions, ATP and a buffer, thereby obtaining nicotinamide mononucleotide. The method of the invention omits the step of refining nicotinamide ribose, and thus has simpler process, lower cost and less time consumption, and has the advantages of faster reaction speed and lower enzyme consumption compared with the enzyme catalytic process directly using refined nicotinamide ribose solid.

Method for preparing nicotinamide mononucleotide by using nicotinamide as raw material

Mirror

Neck massager

Makeup mirror

Facial cleansing brush

Facial massager

A lumen stent () and an implant are provided. The lumen stent includes a tubular body (), an inner branch () and an outer branch () which are respectively communicated with the tubular body (). The tubular body () includes a first body segment (), a tapered segment () and a second body segment () which are connected in sequence. The tapered segment () is provided with an outer branch window () and an inner branch window (). The proximal end of the outer branch () is connected to the outer branch window (). The distal end of the inner branch () is connected to the inner branch window (). The area of the inner branch window () is larger than that of the outer branch window (). The beneficial effects are as follows: since the area of the inner branch window () is larger than that of the outer branch window (), most of blood flow can rapidly pass through the inner branch (), so that the blood flow pressure of the outer branch () is reduced, and the distal end of the outer branch () is prevented from tilting and touching an inner wall of a tumor cavity.

Lumen stent and implant

Circuit integrated with voice wake-up function, television and voice control method. The circuit integrated with voice wake-up function comprises television mainboard and far-field voice module. The far-field voice module comprises: microphone unit for collecting voice simulation signal; analog-digital conversion unit for converting voice simulation signal to digital signal; main control unit for processing converted digital signal and outputting same to television mainboard; and voice wake-up unit for processing voice simulation signal and outputting wake-up signal to television mainboard. Microphone unit is connected to analog-digital conversion unit and voice recognition unit, respectively; analog-digital conversion unit is connected to main control unit and television mainboard, respectively; and television mainboard is connected to main control unit and voice wake-up unit, respectively.

Circuit integrated with voice wake-up function, television and voice control method

Pet bed

A lumen woven support (), comprising a netted tube body () woven by weaving filaments (), wherein the netted tube body () comprises a first portion () and a second portion () along an axial direction; the netted tube body () further comprises a plurality of first hooked and wound knots (), at least two weaving filaments () from one end of the second portion () are hooked and wound to each other in the axial direction of the netted tube body () to form a first hooked and wound knot () and are then separated, and all the weaving filaments () constituting the first hooked and wound knots () are woven to form the first portion (); and the mesh density of the first portion () is smaller than that of the second portion (). In the above-mentioned lumen woven support (), since the mesh density of the first portion () is smaller than that of the second portion (), the radial supporting force of the first portion () is reduced, and the stimulation to a normal lumen wall caused by the first portion () is reduced, thereby lowering a risk of restenosis. In addition, the first portion () has a good flexibility, the second portion () has a greater radial supporting force so as to provide sufficient anchoring, and therefore, the above-mentioned lumen woven support () is applicable to practical implantation.

Lumen woven support

Wifi router wall mount

Growing community of inventors

Shenzhen, China

Qin Wang