The hyphae are white, like fine wool, with short, neat, thick and strong hair. They extend into the bottom of the bottle, and grow evenly. They are uniform from top to bottom, dug out into pieces, and are not loose.
After the mycelium grows in the bottle, brown beads are generally secreted on the surface of the bacteria. Later on the surface and surface of the bottle appeared light yellow transparent colloidal ear buds.
The strain column is closely attached to the wall of the bottle, and a small amount of white water droplets on the inner wall of the bottle is a fresh strain. If there is a slight yellowish water at the bottom of the bottle, the bacterial column will shrink from the wall and become an aging strain, so it cannot be used.
The normal strains have a characteristic aromatic odor of black fungus. If there is odor and musty smell, or there are no signs of plaque and globular bacteria, it is bacterial contamination. If there are other red, green, yellow, black and other colors, It has been contaminated with bacteria and cannot be used.
If there is a light black colloidal substance (ear base) between the medium and the bottle wall, this indicates that the strain is precocious or has too many expansion times. After cultivation, the ear piece is small, and the quantity is large, so it is difficult to grow and the quality is poor. Low, should be eliminated.
If wooden particles can be seen in the bottle and there are few hyphae, it means that the culture time is too short and should continue to be cultivated. If there is no significant change after a period of culture, it means that the nutrient in the medium is insufficient and should be supplemented.
If the strain grows to about half or a corner no longer grows, it may be too dry or too wet. If the mycelium grows neatly and densely, it appears sparsely and there is a clear demarcation, indicating that the upper material is moderate and the lower part is too dense.
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