Write a guide. For many people, it is easy to tell if your Ray-Ban sunglasses have polarized lenses, but some people are unsure and want to know for certain. There are two ways to tell: first, it could be written on the inside of the ear band, and, second, you can look on the top corner of the lenses.
toxins in food. in nutritional disease: Toxins in foods. A greenish tinge on potatoes, although merely the harmless substance chlorophyll, indicates that the natural toxicant solanine may be present. Solanine builds up when a potato is handled roughly, exposed to light or extremes of temperature, or is old.
The potato belongs to the Solanaceae or nightshade family whose other members include tomatoes, eggplants, peppers, and tomatillos. They are the swollen portion of the underground stem which is called a tuber and is designed to provide food for the green leafy portion of the plant.