Photo Researchers ftp March 2011

The seizures of epilepsy are dramatically demonstrated by the EEG traces. The largest and most regular electrical activity of the brain occurs in an a...

The seizures of epilepsy are dramatically demonstrated by the EEG traces. The largest and most regular electrical activity of the brain occurs in an a...

Color enhanced light micrograph of fruit fly (Drosophila) chromosomes. 400x magnification.

Color enhanced light micrograph of fruit fly (Drosophila) chromosomes. 400x magnification.

Color enhanced light micrograph of fruit fly salivary gland chromosomes. The fruit fly, Drosophila, is one of the most valuable of organisms in biolog...

Color enhanced light micrograph of fruit fly salivary gland chromosomes. The fruit fly, Drosophila, is one of the most valuable of organisms in biolog...

Color enhanced light micrograph of fruit fly salivary gland chromosomes. The fruit fly, Drosophila, is one of the most valuable of organisms in biolog...

Color enhanced karyotype of normal human male chromosomes. A karyotype is a photomicrograph of chromosomes that looks at the number, form, and size of...

Color enhanced karyotype of normal human male chromosomes. A karyotype is a photomicrograph of chromosomes that looks at the number, form, and size of...

Color enhanced electron micrograph of a cell in the actively dividing root tip of maize. Several clumps of Golgi membranes can be seen above the nucle...

Color enhanced electron micrograph of a cell in the actively dividing root tip of maize. Several clumps of Golgi membranes can be seen above the nucle...

Color enhanced electron micrograph of a cell in the actively dividing root tip of maize. Several clumps of Golgi membranes can be seen above the nucle...

Color enhanced electron micrograph of the herpes simplex virus in the nucleus of a cell.

Color enhanced electron micrograph of the herpes simplex virus in the nucleus of a cell.

Color enhanced electron micrograph of the herpes simplex virus in the nucleus of a cell.

Color enhanced micrograph of mitosis in action, with the midbody clearly visible. Magnification unknown.

Color enhanced micrograph of mitosis in action, with the midbody clearly visible. Magnification unknown.

Color enhanced micrograph of mitosis in action, with the midbody clearly visible. Magnification unknown.

Color enhanced transmission electron micrograph of the epithelial junctional complex in apical-based sequence of intestinal epithelium of a rat. Compo...

Color enhanced transmission electron micrograph of the epithelial junctional complex in apical-based sequence of intestinal epithelium of a rat. Compo...

Color enhanced transmission electron micrograph of the epithelial junctional complex in apical-based sequence of intestinal epithelium of a rat. Compo...

Color enhanced Scanning Electron Micrograph of the whiplike larva of the root-knot nematode Meloidogyne incognita penetrating a tomato root. Once insi...

Color enhanced Scanning Electron Micrograph of the whiplike larva of the root-knot nematode Meloidogyne incognita penetrating a tomato root. Once insi...

Color enhanced Scanning Electron Micrograph of the whiplike larva of the root-knot nematode Meloidogyne incognita penetrating a tomato root. Once insi...

Color enhanced Scanning Electron Micrograph (SEM) of mustard (Brassica) seeds; magnification 460x.

Color enhanced Scanning Electron Micrograph (SEM) of mustard (Brassica) seeds; magnification 460x.

Color enhanced Scanning Electron Micrograph (SEM) of mustard (Brassica) seeds; magnification 460x.

Color enhanced Scanning Electron Micrograph (SEM) of the underside of a Russian Silverberry (Elaeagnus angustifolia, also known as Oleaster or Russian...

Color enhanced Scanning Electron Micrograph (SEM) of the underside of a Russian Silverberry (Elaeagnus angustifolia, also known as Oleaster or Russian...

Color enhanced Scanning Electron Micrograph (SEM) of the underside of a Russian Silverberry (Elaeagnus angustifolia, also known as Oleaster or Russian...

In November 2009 swine flu vaccinations were offered free of charge to the public. Shown here is a flu clinic organized by the Orange County Health C...

Pharmacy label for prescription hydrocodone pills. Hydrocodone is an opioid derived from codeine and thiamine. Hydrocodone is an orally active narcoti...

Hydrocodone is an opioid derived from codeine and thiamine. Hydrocodone is an orally active narcotic analgesic (pain reliever) and antitussive (cough...

Hydrocodone is an opioid derived from codeine and thiamine. Hydrocodone is an orally active narcotic analgesic (pain reliever) and antitussive (cough...

A doctor examining a teenage female patient with an ear scope.

A doctor examining a teenage female patient with an eye scope.

Color enhanced electron micrograph of microtubules in a nerve axon.

Color enhanced electron micrograph of microtubules in a nerve axon.

Color enhanced electron micrograph of microtubules in a nerve axon.

Color enhanced micrograph of a cell membrane.

Color enhanced micrograph of a cell membrane.

Color enhanced micrograph of a cell membrane.

Color enhanced light microscopy of a basophilic leucocyte, white blood cell that stains readily with basic dyes.

Color enhanced light microscopy of a basophilic leucocyte, white blood cell that stains readily with basic dyes.

Color enhanced light microscopy of a basophilic leucocyte, white blood cell that stains readily with basic dyes.

Color enhanced Transmission electron micrograph (TEM) of the tobacco mosaic virus (TMV). Each virus consists of a protein coat with internal RNA genet...

Color enhanced Transmission electron micrograph (TEM) of the tobacco mosaic virus (TMV). Each virus consists of a protein coat with internal RNA genet...

Color enhanced photograph of a gross anatomical specimen of the digestive organs.

Color enhanced photograph of a gross anatomical specimen of the digestive organs.

Color enhanced micrograph of a thin section of African Swine Fever virus. It has formed in the cytoplasm of a tissue culture of the infected primary s...