This is mostly caused by tires that are overinflated. When a tire is overinflated, the tire, in essence, bulges out more in the center. The tire then rides mostly on that bulge and that bulge wears faster than the sides of the tire. Keeping your tires properly inflated can help you to avoid center wear.
Lysozyme is abundant in a number of secretions, such as tears, saliva, human milk, and mucus. It is also present in cytoplasmic granules of the macrophages and the polymorphonuclear neutrophils (PMNs). Large amounts of lysozyme can be found in egg white.
Inside the mouth, persistent white lesions can be concerning. Oral lichen planus is a benign condition of the inside cheeks, lips, or tongue. This diagnosis should be made by a professional, because white lesions inside the mouth can also be squamous cell carcinoma. A common cause of white lesions in the mouth is oral candidiasis, which is a yeast infection.