Photo Researchers ftp March 2011

Cryostorage. Cultured skin stored in liquid nitrogen freezer.

Convection, wildfire creates storm cloud. Idaho.

Satellite volcanic cones on the upper slopes of Mauna Kea, with slope of Mauna Loa beyond; Big Island, Hawaii.

This equipment was developed by Jay Georgi, Professor Emeritus at Cornell University, USA. Named the "Artificial Dog," it is used for breeding fleas f...

Petri dish containing live dog fleas (Ctenocephalides canis), both adults and larvae. The pellets are a carbohydrate food source called vancomycin.

Professor Jay Georgi with his dog, Jake. As Professor Emeritus at Cornell University, Georgi developed an "Artificial Dog," as a method of breeding fl...

Fresh cow blood is poured into "Artificial Dog" equipment, an artificial environment designed for breeding fleas used in the study of transmissible di...

Cumulus clouds.

Light micrograph (LM) of the spleen, showing red pulp with cords of Bilroth and venous sinuses between trabeculae; magnification unknown. The spleen i...

Transission Electron Micrograph (TEM) showing neutrophil (a type of white blood cell) in section. From human blood. Magnification unknown.

Light micrograph (LM) of lymphocyte cell membrane, showing small cytoplasmic projections. Magnification unknown.

Light micrograph (LM) of lymph node, showing follicle with its germinal center and adjacent paracortex. Low magnification.

Light micrograph (LM) of lymph node hilium, showing efferent lymphatic vessel and artery. Medium magnification.

Light micrograph (LM) of eosinophil (a type of white blood cell) and red blood cells at high magnification.

Light micrograph (LM) of monocyte (a type of white blood cell). Monocytes ingest bacteria and cell debris in connective tissues. Magnification unknown...

Light micrograph of macrophages in connective tissue. Magnification unknown. Macrophages are immune system cells that are found in tissues rather than...

Light micrograph (LM) of child's thymus: divided into lobules and surrounded by adipose (fatty) tissue of the mediastinum. Magnification unknown.

Light micrograph of H&E stained secondary lymphoid follicle, consisting mainly of B cells (B-lymphocytes). Magnification unknown.

Color-enhanced Transmission Electron Micrograph (TEM) of lymphocyte (a type of white blood cell), magnification unknown.

Color-enhanced Transmission Electron Micrograph (TEM) of section of basophil (basophil granulocyte, the least common type of white blood cell). Magnif...

Color-enhanced Transmission Electron Micrograph (TEM) of a plasma cell, magnification unknown. Plasma cells are white blood cells that produce large v...

Color-enhanced Transmission Electron Micrograph (TEM) of a plasma cell, magnification unknown. Plasma cells are white blood cells that produce large v...

A monarch butterfly (Danaus plexipus) tagged for migration research.

Scientists measure the girth of a female polar bear (Ursus maritimus); Cape Churchill, Hudson Bay, Canada.

These twin polar bear (Ursus maritimus) cubs have had ear tags inserted in each ear and their lips tattooed for tracking purposes; Cape Churchill, Hud...

Research Laboratory.

Color-enhanced Transmission Electron Micrograph (TEM) of a lymphocyte, magnification unknown.

Color-enhanced Transmission Electron Micrograph (TEM) of monocyte (a type of white blood cell), magnification unknown.

Microscopy. Researcher studies a tissue sample thorough a microscope.

Color-enhanced Transmission Electron Micrograph (TEM) of section of basophil (basophil granulocyte, the least common type of white blood cell). Magnif...

Researcher in lab pipetting.

Pacific flyway 5-year banding project. US fish and wildlife service aluminum bands used for banding ducks.

Heavy rain in Lincoln County, Kansas.

Chromatography, one of many purification steps employed in the final stages of production of VaxSyn, an experimental AIDS vaccine. VaxSyn is based on...

Color-enhanced Transmission Electron Micrograph (TEM) of section of eosinophil (a type of white blood cell). Magnification unknown.

Color-enhanced Transmission Electron Micrograph (TEM) of human white blood cells. Magnification unknown.

Cumulus clouds. Washington.

Plate reader. Screen shows kinetic plots for enzyme-linked immune absorbent assay.

Scientist pipettes washing solution for enzyme immunoassay.

Organic chemist prepares compounds in solution for thin layer chromography.

Scientists with research model of x-ray crystallography of a cardiovascular therapeutic compound which lowers cholesterol.

Researcher in lab pipetting.

Researcher in lab pipetting.

Researcher in lab pipetting.

Researcher in lab pipetting.

Researcher in lab pipetting.

Researcher in lab pipetting.

Experimental feeding tanks for red drum larva (Sciaenops ocellatus) at the University of Texas Marine Science Institute, Port Aransas, Texas.

A giant 40-pound cabbage from Matanuska Valley, Alaska.

The 72 inch Bubble Chamber in the Radiation Laboratory of the University of California, Berkley.