At the same time, more complex substances and the strict requirements of manufacturers and legislation have placed growing demands on the packaging industry. (manufacturingchemist.com)
The lack of complex substances makes synthetic vitamin C like a laptop that has its outer shell, with the screen and keyboard, but none of the complex wires and circuits inside. (supernaturalacnetreatment.com)
All those genes were recipes for enzymes: protein machines that, working together, can build complex substances from simple starting materials. (sciencedaily.com)