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Natural polymers can vary widely in color due to their diverse origins. For example, cellulose, a polymer found in plants, is typically white or light brown in its pure form. Natural rubber, another polymer, initially appears as a milky white sap that can be dried into a more opaque, off-white or pale yellow material. Chitin, found in the exoskeletons of insects and crustaceans, can be transparent, white, or a variety of other colors depending on additional biological components. Silk, a protein-based polymer produced by certain insects, is usually white or yellowish. The color of a natural polymer is highly dependent on its source, the presence of other biological molecules, and post-extraction processing.
Coats' disease is a rare eye disorder, predominantly affecting the retina, characterized by the abnormal development of blood vessels behind the eye. The exact cause of Coats' disease remains largely unknown, though it is not believed to be hereditary. Research suggests it could be linked to random mutations in the genes responsible for the development and maintenance of retinal blood vessels. Because it disrupts normal blood flow and leads to the leakage of serum and lipids into the retina, it can cause vision loss or even blindness if not treated. The condition is more commonly observed in males and typically diagnosed in childhood or adolescence. Though there's no cure, treatments like laser therapy or cryotherapy can manage the symptoms and prevent progression.
The red dye used in M&Ms has evolved over time. Initially, Red No. 2, also known as amaranth, was used until it was banned due to health concerns. The current red dye in M&Ms in the United States is Red No. 40, scientifically known as Allura Red AC. It is a synthetic dye produced from petroleum byproducts and is widely used in the food industry despite controversies over its health effects. In Europe, due to stricter regulations, natural alternatives like beetroot red (E162) are often preferred. Red No. 40 is deemed safe by the FDA, though some consumer groups advocate for the use of natural colorants where possible.
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