Avascular necrosis (AVN) of the hip is an abnormal and possibly crippling condition in which blood cannot get to the hip bone. When the blood supply to the bone is blocked, the area without blood supply can die. This may lead to collapse of the bone requiring replacement with an artificial hip joint.
Nitrogen Fixing Trees for Permaculture Flowers of the leguminous tree, Kowhai, the national flower of New Zealand Nitrogen fixation is a pattern of nutrient cycling which has successfully been used in perennial agriculture for millennia. This article focuses on legumes, which are nitrogen fixers [â¦]
Functions of nitrogen in plants. 1  Nitrogen is an essential element of all amino acids. 2  Nitrogen is also a component of nucleic acids, which form the DNA of all living things and holds the genetic code. 3  Nitrogen is a component of chlorophyll, which is the site of carbohydrate formation (photosynthesis).