« previous next »
« previous next »
 

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

There are more nerve cells in one human brain than there are stars in the Milky Way.

Did you know?

The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Four ways to visualize protein structure Four ways to visualize protein structure
The complex structure of the hemoglobin protein. The complex structure of the hemoglobin protein.
Levels of protein structure: Tertiary structure Levels of protein structure: Tertiary structure
One type of safety needle withdraws into a protective sheath when the injection is complete. One type of safety needle withdraws into a protective sheath when the injection is complete.
Genetic modification of organisms and DNA recombinant Genetic modification of organisms and DNA recombinant
If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ... If 0.40 mol of NaN3 reacts completely in the reaction shown below, then ________ L of N2 will ...
Video: Phases of the Female Reproductive Cycle - Hormonal regulation

For a complete list of videos, visit our video library