Ribonucleic acid (RNA) is a linear molecule composed of four types of smaller molecules called ribonucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U).ach ribonucleotide base consists of a ribose sugar, a phosphate group, and a nitrogenous base. Adjacent ribose nucleotide bases are chemically attached to one another in a chain via chemical bonds called phosphodiester bonds. Unlike DNA, RNA is usually single-stranded.
Urushi is a kind of natural lacquer collected from the Urushi tree. We Japanese have a 6000 year history of the use of Urushi.Initially it was used as an adhesive, like fixing an arrowhead to the wooden shaft, applying gold foil or fixing chipped porcelain.hen it came to be used for finishing lacquer soup bowls and furniture. The Urushi tree grows in many parts of east Asia including Japan. Collecting Urushi is like collecting gum from rubber tree. We cut the bark of the tree and then the tree yeilds a milky-white sap to cure the wound.
URUSHI LIQUID Urushi is obtained as sap Fig. U1 from the urushi tree 'RhusVerniciflua' which originally comes from the Himalayas. The urushi tree is to be found mostly in Southeast Asia, particularly in countries such as Japan, China, Korea, Taiwan, Vietnam, Burma, Cambodia, Bhutan and it prefers a warm climate.Mango, cashew nut and pistachio are also family of the urushi tree.ig. U3 urushi trees and kakitori: Nihon Urushi-kakigijutu Hozonkai, Joboji, Iwate, Japan. The bark of the male tree is softer than the female tree and a male tree with a softer bark produces even more urushi liquid. In fact the urushi tree is a weak tree with a soft structure.