1 Membranes separate their contents from the environment. 2  Cell membranes separate the cell contents from its environment, and organelle membranes separate the organelle contents from their environment. 3  Membranes regulate the movement of materials through them.
The Wirtgen Group sees itself as an expert partner. for the construction industry. Thanks to our in-depth. understanding of everyday work on construction sites, we have the necessary knowledge to continually assess. products and services for their practical suitability.
Company Description. Energen Corp is a domestic oil and gas exploration and production company. Its reserves are primarily in the Permian basin of west Texas. The Company is also exploring the potential of an emerging oil play in the Mancos formation in the San Juan Basin. Sector: Basic Materials.