IACUC GUIDANCE ON PI RECORDKEEPING FOR ANIMAL RESEARCH. INTRODUCTION. This document is provided to assist the animal investigator in determining the appropriate and. necessary record-keeping for animals in research, as mandated by federal and university laws, regulations, and policies.
Meaning Of Opal. Everyone associates opals as one of the worlds most unique gemstone. but what is the meaning of the word Opal. The name Opal is derived from ancient Sanakrit Upala meaning precious stone and later the Greek Derivative Opallios meaning to see a change of colour.
Photo: Opalite. Opal is a hydrous silicon dioxide mineraloid (it has no crystalline structure, and between 10% to 20% water content). There are 2 groups of Opal: Precious Opal (play of colour) and Common Opal (no play of colour). Light diffracts into a spectrum of colours through ordered micro-silica spheres within Precious Opal.