A spherical shell that is usually made of a biodegradable or resorbable plastic polymer, that has a very small diameter usually in the micrometer or nanometer range, and that is often filled with a substance (as a drug or antibody) for release as the shell is degraded.
A spherical shell that is usually made of a biodegradable or resorbable plastic polymer, that has a very small diameter usually in the micrometer or nanometer range, and that is often filled with a substance (as a drug or antibody) for release as the shell is degraded...
Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..
In this tutorial, the works of Carl Gustav Jung and Sigmund Freud are described. Both of them actively pursued the way h..
Plants, like animals, produce hormones to regulate plant activities, including growth. They need these hormones to respo..
This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..
This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..
A still body of water may be disturbed by a variety of factors. One of them is wind. In fact, it is considered as the pr..
