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Images Dated 31st March 2004

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

Choose from 80 pictures in our Images Dated 31st March 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.

Coloured TEM of T4 bacteriophage infecting E. coli Featured 31 Mar 2004 Print

Coloured TEM of T4 bacteriophage infecting E. coli

Bacteriophage. Coloured transmission electronmicrograph of a T4 bacteriophage (orange) afterinjecting its viral DNA into the Escherichia coli bacterium (blue). Bacteriophages areviruses that infect bacteria; T4 is specific to E.coli. It is secured to the surface of thecell by spidery tail fibres. The tail, acontractile sheath, shortens to allow asyringe-like tube (below base plate of tail) toenter the cell membrane, emptying the DNA contentsof the head into the bacterium. The capsid, aprotein coat surrounding the DNA, stays outside.Phage synthesis in the cell follows rapidly.Magnification: X65, 000 at 6x7cm size.magnification: x220, 000 at 10x8 size

© Biozentrum, Universtiy Of Basel/Science Photo Library

Australia-Nature-Seal-Sanctuary Featured 31 Mar 2004 Print


A female Australian sea-lion, swims through the water in Sydney Aquarium's Seal Sanctuary, 31 March 2004. The Sanctuary which opened in late 2003, houses seals who are too old or, due to illness or injury couldn't otherwise survive in the wild and includes a see-through underwater tunnel system running through a tank which holds two million litres of water, pumped and filtered through 24 sand filters directly from Sydney Harbour. AFP PHOTO/Greg WOOD / AFP PHOTO / GREG WOOD

© Agence France-Presse (AFP) - All Rights Reserved

A Calculating machine Featured 31 Mar 2004 Print

A Calculating machine

The control panel of the automatic sequence-controlled calculating machine at Manchester University; showing the monitor cathode-ray tube with Dr. T. Kilburn (left) and Professor F. C. Williams (right), inventor of the memory storage system. Williams became Professor Electrical Engineering at Manchester in 1946 is chiefly known for his development of the Williams tube, the first successful electrostatic random access memory for the digital computer. This enabled him, along with Kilburn, to operate the world's first stored-program computer in June 1948

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