For the UV transformation of ordinary offset presses, Tianjin Ruisente's 6 key steps for the transformation of offset presses are as follows: 1. Add UV curing device The additional UV curing light source is generally a metal halogen lamp or a high-pressure mercury lamp. Note the following: ----more
Solid phase extraction and its application in food analysis · Overview · In food analysis, the pretreatment of the tested sample is an extremely important step. At present, the commonly used extraction and separation methods for food analysis and pretreatment in China are still liquid-liquid ----more
Solid phase extraction and its application in food analysis · Overview · In food analysis, the pretreatment of the tested sample is an extremely important step. At present, the commonly used extraction and separation methods for food analysis and pretreatment in China are still liquid-liquid ----more
The graphic is an important element for expressing individuality in packaging design. Because graphic design is mainly reflected in the processing of images, symbols and text in packaging and changes in form and structure, and because graphics have strong visual effects, rich meanings, easy to rem ----more
The gas chromatograph should pay attention to the following factors in use: (1) Environmental conditions The gas chromatograph does not have strict requirements on the ambient temperature. Generally, it can be operated normally at room temperature of 5 ～ 35 ℃. However, the general requ ----more
In-mold label materials mainly exhibit two different appearances according to their different application conditions. 1. Smooth surface material This material is suitable for the shape of the curved bottle body, because the curved bottle body can be naturally exhausted when it comes into contact ----more
Save: Large polypeptides are very stable at -20 ° C, especially freeze-dried and stored in a desiccator. The lyophilized polypeptides can be placed at room temperature before they are exposed to air. This will reduce the influence of humidity. When freeze drying is not possible, the best metho ----more