Characteristics of vertical rotor of high speed and large capacity refrigerated centrifuge

Features of high-speed large-capacity refrigerated centrifuge vertical rotor:

1. The separation time is short. This is because the radial distance of the vertical rotor sample zone movement is short and a minimum K value can be obtained .

2 , the impact of the wall effect is minimal.

3. Ability to centrifuge larger volumes of sample.

4 , high resolution. Since the sample zone is spread along the length of the centrifuge tube during centrifugation, the gradient is reoriented during the rotor speed reduction process, and the zone spacing is increased.

5. Provide maximum centrifugal force. The centrifuge tube is inserted close to the outer edge of the rotor and has a minimum relative centrifugal force greater than that of the horizontal and angular rotors of the same diameter.

6 , the gradient capacity is large. The cross-sectional area of ​​the vertical rotor gradient is large, and it is feasible to spread the sample on the gradient.

(1) The gradient medium should be inert, at least not toxic to the particles being separated.

(2) The gradient medium is capable of quantitatively separating the particles in the suspension, that is, the gradient column to be configured with a certain density range.

(3) The physical and chemical properties of the gradient medium should be known, and the concentration of the gradient medium can be accurately determined by using one or more of these characteristics (such as refractive index).

(4) The gradient medium should be isotonic with respect to osmotic pressure within a given density range.

(5) The viscosity of the gradient medium should be as low as possible within a given density range.

(6) The gradient medium should be able to adjust to the pH and ionic strength consistent with the physiological state of the separated particles , and the pH and ionic strength remain unchanged regardless of the medium concentration, and hydration does not occur.

(7) The gradient medium does not interfere with the monitoring of the sample zone during fractionation.

(8) Gradient media should be conveniently removed from the separated particles without loss of sample activity.

(9) It can be sterilized, and the separation characteristics are unchanged, and the centrifuge tubes, rotors and various gauges used are not corroded.

(10) The gradient material used should be pure material, cheap, and valuable materials can be recycled and reused after use.

The above characteristics are strict requirements for an ideal gradient medium, and none of the materials can fully meet these standards. In the rate zone separation, sucrose can meet the requirements of most particle separation and is a relatively ideal medium. However, in iso-density zone separation, no medium can satisfy the separation of all types of biological samples, so the separation of different types of biological samples requires the use of a wide range of gradient media.

Hydrazine Compound Series

Carbohydrazide can act as an oxygen scavenger to prevent corrosion, especially in boiler feedwater systems, rocket propellant assemblies, color image and soap stabilizers, antioxidant rubber, boiler water deoxidizers and metal passivators. Carbohydrazide can also be used as an anticorrosive agent. Organic synthesis of intermediates.

CAS No. 497-18-7 EINECS 207-837-2

Molecular Formula CH₆N₄O Molecular Weight 90.08

Attributes:

Carbohydrazide is a white crystalline powder or granule. The effective content of carbohydrazide is from 98.0 to 100.0%.

Specifications:

Packaging and storage:

Pack 25 kg or 50 kg with woven bags or fiber drums.

Store in a cool, dry, well-ventilated area away from incompatible materials. Please close the container when not in use.

Tert-Butyl Carbazate,Ethyl Carbazate,Benzyl Carbazate,Carbohydrazide,Acetyl Hydrazine

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