Monobenzone can decompose melanin in the skin, and prevent the formation of melanin in the skin, used for the treatment of hyperpigmentation, such as various spots, age spots, melanoma. In addition as intermediates in organic synthesis.
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Function:
1.Monobenzone is a compound used as a topical drug for medical depigmentation.
2.The topical application of monobenzone powder in animals decreases the excretion of melanin from melanocytes. The same action is thought to be responsible for the depigmenting effect of the drug in humans.
3.Monobenzone may cause destruction of melanocytes and permanent depigmentation.
4.The histology of the skin after depigmentation with topical monobenzone powder is the same as that seen in vitiligo.
5.The epidermis is normal except for the absence of identifiable melanocytes.
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First, hot oil cleaning method due to use for a long time, soft dry oil or anti-rust paste hardened bearings, should be immersed in 100 ~ 200 degrees of hot oil, clamp the bearings with pliers, brush clean with the brush on the oil. Soft dry oil or anti-rust paste is heated to 100 ~ 200 °C to melt, it is easy to flush out of the gap in the bearing. Sometimes as long as the bearing is shaken many times in the oil. Oil will also flow away from the gap.
When cleaning the radial spherical bearing of the old motor or imported motor, the ball, the bead frame and the inner ring should be laterally rotated out of the outer ring and then immersed in the hot oil. The short cylindrical roller bearing should also be cleaned when cleaning the roller. The bead frame, the inner ring and the outer ring are detached.
When hot oil is being cleaned, the temperature of the oil should not exceed 20 °C. If the fire is heated directly with an open flame, care should be taken to prevent the oil from burning. The bearing must be hung in the oil pan, and sinking will cause overheating and reduce hardness.
Second, the general cleaning method of the bearing placed in kerosene soak 5 to 10 minutes, one hand holding the inner ring, the other hand rotating the outer ring, the bearing on the dry oil or anti-rust cream will fall. Then put the bearing into the clean kerosene, scrub with a soft brush, wash the oil in the balls and crevices, and then put it in the gasoline and clean it once. Take it out and place it on a clean sheet of paper. Bearings and short cylindrical rollers should be used to clean the bearings, ball bearings, inner ring and outer ring.
The bearing mounted on the shaft is mainly washed by oil or sprayed with oil. The oil that is easy to wash off is used with kerosene and then gasoline. If it is difficult to wash off the oil, it is washed with 100 to 200 degrees of hot oil. Or oil gun spray, then use gasoline to clean. Be careful not to use sharp tools to scrape hard grease on the bearing or rust, so as not to damage the finish of the bearing's rolling elements and groove rings. Washed bearings are used to clean the net cloth.
Motor shaft cleaning points
The motor should normally be cleaned and refueled after 2000 hours of use. There are two types of bearing cleaning methods: