An ampoule is a small sealed vial which is used to contain and preserve a sample, usually a solid or liquid. Ampoules are commonly made of glass, although plastic ampoules do exist. Modern ampoules are most commonly used to contain pharmaceuticals and chemicals that must be protected from air and contaminants. They are hermetically sealed by melting the thin top with an open flame, and usually opened by snapping off the neck. If properly done, this last operation creates a clean break without an
However, earlier research on blood and muscle samples from llama, alpaca, vicuna, vicuÃ±a, guanaco and alpaca x vicuna vicuÃ±a Hybrids At (Santiago zoo Cappuro and) silva 1960 indicated-a llama guanaco-and alpaca, vicuna vicuÃ±a subdivision as have more recent data (From ribosomal genes., semorile et). al in press
Dracaenas are Agave relatives and are a large group of plants that include some of the more popular house plants as well as some of the most striking xeric and massive trees used in outdoor landscaping.This article is an introduction to this interesting group of plants.Dracaena is a large genus of primarily African monocot plants of which there are well over 100 accepted species, most which will not be covered in this article and are virtually unknown in cultivation.his article is an introduction to this interesting group of plants. Dracaena is a large genus of primarily African monocot plants of which there are well over 100 accepted species, most which will not be covered in this article and are virtually unknown in cultivation.