Melanin is a protein that exists in the basal layer of everyone` s skin. The exposure to ultraviolet radiation can cause changes in melanin, generating a substance that protects the skin. Then, melanin moves through the layers of cellular metabolism and reaches the epidermis of the skin, resulting in skin problems such as pigmentation and uneven skin color.
(1) The first step of whitening is to inhibit melanin production.
Melanin is the most important type of pigment that affects skin whiteness, and inhibiting the generation of melanin is the most important ultimate goal of whitening products.
(2) The second step of whitening is to block melanin transport.
After melanin is generated within melanocytes, melanosomes are transported along the dendritic processes of melanocytes to the surrounding keratinocytes, affecting skin color.
(3)The third step of whitening, stripping.
By softening the stratum corneum, these substances accelerate the shedding of dead cells in the stratum corneum and promote the metabolism of the epidermis, so that the melanosomes entering the epidermis fall off with the rapid renewal of the epidermis during metabolism process, thereby reducing its impact on skin color.
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The Simple Diagnosis Method of Common Diseases in the Process of Introducing Small Tail Han Sheep
In the introduction of Small Tail Han sheep, attention should be paid to the diagnosis of sheep suffering from diseases. However, due to the tight introduction time and the large number of introductions, there should be a simple method to quickly diagnose and eliminate diseased sheep. After personal experience and drawing lessons from other people's experience, the author summarizes a simple diagnostic method for the following common diseases in the introduction of Small Tail Han sheep. (1) Overweight sheep: These individuals suffer from diseases such as the digestive system, and should use a stethoscope to listen to the rumen and intestinal peristaltic sounds for diagnosis. (2) Overweight obese sheep: This type of individual may have reproductive problems. It is necessary to check the breast and vagina. (3) Excessive body temperature: Only when the sheep is selected, the goat's ears and breasts are touched by hand. The sheep with high body temperature is only diagnosed with a thermometer. (4) Injured sheep: When selecting sheep, pay attention to the appearance and walking status of the sheep, see if there is any injury on the outside, and hand touch the sheep's knee to see if it has arthritis. (5) Respiratory diseases: For individuals with dyspnea and asthmatic symptoms, use a stethoscope to diagnose whether the lungs and trachea are normal. (6) diagnosis of nasal disease: If the sheep's nostrils or plug out of the nose, wipe out the mucus by hand to observe the nostrils, if the internal redness, mostly for nasal inflammation or sheep nose flies and other diseases. (7) Disease diagnosis: When sheep are selected, the sheep's breasts must be observed and touched. The sheep with dysplasia of mammary glands and necrosis of the nipples can be directly excluded. If there is a hard mass in the breast, it is called mastitis. (8) Genital diseases: Observe whether the vulva shape of the sheep is normal, whether the vagina is red and swollen, and whether there is odor pus.
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