Beans are not good sources of either zinc or iron, and they have low protein digestibility because these legumes are chock full of antinutrients that impair our bodyâs ability to absorb and assimilate potential nutrients found in these foods.eans are not good sources of either zinc or iron, and they have low protein digestibility because these legumes are chock full of antinutrients that impair our bodyâs ability to absorb and assimilate potential nutrients found in these foods.
Vellum (derived from the Latin word vitulinum meaning made from calf, leading to Old French vÃ©lin, calfskin) often refers to a parchment made from calf skin, as opposed to that from other animals. It is prepared for writing or printing on, to produce single pages, scrolls, codices or books.
Vellum is generally smooth and durable, although there are great variations depending on preparation and the quality of the skin. The manufacture involves the cleaning, bleaching, stretching on a frame (a herse), and scraping of the skin with a crescent-shaped knife (a lunarium or lunellum).