A freeze dryer is equipped with two Taikang compressors. The compressor models are 2480 and 2464 respectively. The drying chamber and the cold trap are separated structures. The water-capacity is strong, the drying time is short, and the freeze-drying effect is very good. The drying chamber adopts the aviation acrylic high-transparency transparent colorless door, and the change process of the material can be clearly observed during the lyophilization process.

Technical data

(1) Cold trap temperature：-70℃(no load).

(2) Separator temperature ：-50℃-70℃.

(3) Ultimate vacuum ：20Pa less (no load).

(4) Drying capacity ：sample tray 4pcs,300mmX450mm

(5) Panel mounting material ：7.5L

This machine is widely used in pharmaceutical, herbal extracts, health care products, food and chemical production. It can be equipped with wide-mouth tube. Because of its stable performance and reasonable price, this machine has been exported to dozens of countries. This series freeze dryer, a SCIENTZ-50F gland type freeze dryer, a SCIENTZ-50F common type lypholizer, this customer belongs to the pharmaceutical industry, mainly used for freeze-dried drugs

The difference between gland type freeze dryer and ordinary freeze dryer 

Ordinary type: Suitable for freeze drying of conventional materials in bulk (liquid, paste, solid).

Gland type: It is not only suitable for freeze drying of bulk materials in liquid (liquid, paste, solid), but also suitable for drying of bottled materials in Xilin. When preparing for lyophilization, the materials are packed into vials as needed, and the caps are covered. After the freeze-drying, after the drying is finished, the cover of the capping device is moved to close the cap to realize the sealing under vacuum, which is easy to store for a long time.

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In order to study the role of DNA molecules in the metabolism of life, it is often necessary to extract DNA from different biological materials. Due to the different distribution and content of DNA molecules in the organism, it is necessary to select appropriate materials to extract DNA.

In animals and plants, the embryos of calf thymus, animal liver, fish sperm, and plant seeds are rich in DNA.

Among the microorganisms, glutamic acid bacteria contain 7%-10%, brewer’s yeast contains 6%, and Escherichia coli contains 9%-10%.

Different methods of extracting DNA from various materials have different degrees of difficulty in separation and extraction.

For lower organisms. It is easier to extract DNA from viruses. Most of the virus DNA has a small molecular weight and it is easy to maintain its structural integrity during extraction.

It is more difficult to extract DNA from bacteria and higher plants and animals. Bacterial DNA has a large molecular weight, typically up to 2*10 Daltons. Therefore, it is easy to be cut by mechanical tension. Bacterial DNA, in addition to nuclear DNA, plasmid DNA, etc.

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