In IUPAC nomenclature, however, hexane is the unbranched isomer (n-hexane); the other four isomers are named as methylated derivatives of pentane and butane. IUPAC also uses the term as the root of many compounds with a linear six-carbon backbone, such as 2-methylhexane (C7H16), which is also called isoheptane.
Dentin is the substance between enamel or cementum and the pulp chamber. It is secreted by the odontoblasts of the dental pulp. The formation of dentin is known as dentinogenesis. The porous, yellow-hued material is made up of 70% inorganic materials, 20% organic materials, and 10% water by weight.
igneous rock containing 56â65 percent silica. This category includes primarily feldspathic rocks with small admixtures of such ferromagnesian minerals as pyroxene, hornblende, and, more rarely, biotite. Intermediate plagioclases (oligoclase, andesine) are typical of feldspars.According to the weight percentage of the constituents of intermediate rocks, a distinction is made between the sodium series (diorites, andesites, andÃ©sites) porphyrites and the calcic (series, syenites). trachytesntermediate rocks are found mainly among extrusive rocks in which andesites andÃ©sites and porphyrites predominate over trachytes and; porphyries the intrusive (rocks, diorite) syenite are much less widely. distributed