Bradford method for measuring protein concentration
Principle: This method is based on Coomassie Brilliant Blue G-250, which has two different forms of red and blue. Under a certain concentration of ethanol and acidic conditions, it can be formulated into a light red solutio…
1. The quality needs should be considered first when the tension machine is repaired. The difference in the tension range determines the difference in the sensors used, which also determines the structure of the tension machine, but this item has little effect on the price (except for the d…
Generally injection molding PP, POM and other polymers are screen printing. Screen printing is the same as screen printing, and the principle is also similar. That is, the basic principle of screen mesh printing is used to permeate ink, and non-graphic printing is not permeable to ink. Dur…
In recent years, with the continuous development of the technical level of the printing and packaging industry, the product quality has been continuously improved. Especially in the fiercely competitive tobacco industry, in order to enhance the artistic visual effects of cigarette packs, v…
1. Scope This standard specifies the determination method of furazolidone residues in aquatic products-high performance liquid chromatography.
This standard applies to the determination of furazolidone residues in the edible parts of aquatic products.
2. Normative cited docume…
Chinese painting is a unique painting technique in China, which pays more attention to artistic conception. It differs from other manuscripts because of the materials used and the content of the expression. The paper it uses is mainly Xuan paper, and the painting tools are focused on the u…
Phenomenon: The varnish cured layer is subjected to a 90-fold bending force, and a crack or layer drop occurs.
Reason 1: The coating is too thick.
Solution: reduce the amount of coating.
Cause 2: The ink layer is not completely dry.
Solution: warm up once or inspe…
Screen printing has the characteristics of thick ink layer, rich graphic layers, strong three-dimensional sense, and wide printing materials. Its application in high-end tobacco, alcohol and food packaging cartons has gradually increased. The use of UV screen ink to print matte, refracted,…
Maintenance knowledge of mechanical parts
Mechanical faults can generally be divided into two types: accidental faults and natural faults. Accidental faults are mostly caused by improper maintenance or adjustment, violation of operating rules, etc., and should be avoided as much as…
1. Double antibody sandwich assay for antigen
The double antibody sandwich method is the most commonly used method for antigen detection. The steps are as follows:
1) Connect specific antibodies to solid phase carriers to …
As a star product of Xieyang, MSF-28P positive pressure cassette type single corrugator has been widely concerned in the industry, and its popularity is high. What are the main features of MSF-28P?
The design of the MSF-28P corrugated roller placed under the pressure wheel reduces …
After more than 20 years of development, China's bank card industry has achieved tremendous achievements. The domestic holdings of UnionPay cards have exceeded 2.07 billion, and have been accepted in 83 overseas countries and regions. As of the end of 2009, there were 195 domestic card …