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Home > All Images > 2004 > August > 26 Aug 2004

Images Dated 26th August 2004

Available as Framed Photos, Photos, Wall Art and Gift Items

Choose from 83 pictures in our Images Dated 26th August 2004 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for quick delivery.


False-col TEM of AIDS virus inside T-cell Featured 26 Aug 2004 Print

False-col TEM of AIDS virus inside T-cell

False-colour transmission electron micrograph of AIDS virus particles inside a stricken T4 lymphoc- yte, a white blood cell of the immune system. AIDS (Acquired Immune Deficiency Syndrome) destroys T4 lymphocytes, rendering the victim liable to fatal secondary infections. The virus, designated HIV for Human Immunodeficiency Virus, is a retrovirus: its genetic program is held in RNA (red cores of virus spheres), translated into DNA inside the T4 cell, & infiltrates the cell's own DNA. Once activated, the viral DNA replicates & progeny bud from the cell wall, killing the host cell. Magnif- ication: x30, 000 at 35mm, x60, 000 at 6x7cm sizes

© CNRI/SCIENCE PHOTO LIBRARY CNRI/SCIENCE PHOTO LIBRARY

Disease-watching satellites Featured 26 Aug 2004 Print

Disease-watching satellites

Disease-watching satellites, conceptual image. Satellites collecting data from Earth, which will be used to predict and prevent disease epidemics. The satellites are initially used to build up a climate profile of a region. With the addition of high-resolution imagery and demographic information, changes in a region's conditions that lead to disease can be tracked and potential disease hotspots identified before an outbreak has time to spread. One such disease that is monitored is malaria, a disease spread via infected, blood- sucking mosquitos (centre), which kills at least one million people a year

© VICTOR HABBICK VISIONS/SCIENCE PHOTO LIBRARY

Hermann-Hering illusion Featured 26 Aug 2004 Print

Hermann-Hering illusion

Hermann grid illusion. The intersections of the white horizontal and vertical lines in this image appear to be grey. But when looked at directly they are clearly white. This is because of the role played by the edge of the retina. Our peripheral vision is designed to prioritise identifying shapes and edges. To this end the brightness of an image on the edge of the retina is diminished when it is not important to shape identification. At the intersections, a lot more of the area is white light compared to elsewhere on the lines, and there is an effect called lateral inhibition. The brightness is dimmed for this area, and we observe it as grey

© SCIENCE PHOTO LIBRARY