1, look at the shape. Look at the shape first, the guate's one is slightly thinner, the other is slightly thicker, but the whole melon is more symmetrical, don't be so big, the melon belly is bigger, the seeds are a bit old, not brittle, the guise wants that 茬 fresher If the guate is yellow, it is taken for a long time, not fresh.
2, view the color. The mature melon is grayish white, the surface is smooth and yellow, the unripe melon is grayish green, the color is darker, and the surface has a layer of fine fluff.
3. Smell the taste. The unripe shofar honey smells a bit green and has a bit of bitterness, and the mature smells a scent.
4. Pressing method. Gently press the melon with your fingers. Don't be too hard, you can press it slightly, but it is definitely not the soft feeling.
5, look at the melon umbilical is the head of the melon belly, there is a small circle at the top, the circle is big and the drum is cooked is better.
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Antibiotic refers to a class of secondary metabolites produced by microorganisms (including bacteria, fungi, actinomycetes) or higher animals and plants that have anti-pathogens or other activities in the life process and can interfere with the development of other living cells. Chemical material. Antibiotics commonly used in clinic are extracts from microbial culture fluids and chemically synthesized or semi-synthetic compounds. [1]
The antibacterial or bactericidal effect of antibiotics and other antibacterial agents is mainly aimed at killing the mechanism of "there is bacteria but not by humans (or other animals and plants)". It contains four major mechanisms of action, namely: inhibiting bacterial cell wall synthesis and enhancing bacterial cell membrane permeability Sex, interfere with bacterial protein synthesis and inhibit bacterial nucleic acid replication and transcription.
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