Understanding Vivarium Substrates. By A. C. Highfield. Libyan tortoise-this tortoise requires a sandy, dry substrate. If maintained on grass or upon a moist substrate it will suffer shell and respiratory infections.Along with heating and lighting systems, the choice of substrate in tortoise vivaria and terraria often causes a great deal of confusion to keepers.Some substrates are excellent, others positively lethal.nderstanding Vivarium Substrates. By A. C. Highfield. Libyan tortoise-this tortoise requires a sandy, dry substrate. If maintained on grass or upon a moist substrate it will suffer shell and respiratory infections.
In their general structure, heterocyclic compounds resemble cyclic organic compounds that incorporate only carbon atoms in the ringsâfor example, cyclopropane (with a three-carbon-atom ring) or benzene (with a six-carbon-atom ring)âbut the presence of the heteroatoms gives heterocyclic compounds physical and chemical properties that are often quite ...
A chemical compound is a chemical formed from atoms of different chemical elements. The different atoms are joined by chemical bonds. The elements stick together so strongly that the compound behaves like one substance. The chemical that is made depends upon what atoms it is made of and how they are joined together.