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Images Dated 29th November 2005

Choose from 65 pictures in our Images Dated 29th November 2005 collection for your Wall Art or Photo Gift. Popular choices include Framed Photos, Canvas Prints, Posters and Jigsaw Puzzles. All professionally made for Quick Shipping.

James Clark Maxwell with his demon Featured 29 Nov 2005 Print

James Clark Maxwell with his demon

James Clark Maxwell and his demon, artwork. Maxwell (1831-1879) is best known for his laws of electromagnetism, which laid the foundations for modern physics. His "demon" was a thought experiment to question the Second Law of Thermodynamics: the entropy of a system tends to increase. This means that a hot region cannot draw heat from a colder region. Maxwell's demon is a being that can operate a door between a hot and cold gas, opening it to allow a fast-moving (hot) molecule to pass to the hot side, or a slow- moving one to pass to the cold side. This would violate the second law. However, as the demon requires energy to distinguish between fast and slow approaching molecules, and to operate the door, the entropy of the system increases anyway


Liver blood supply, SEM Featured 29 Nov 2005 Print

Liver blood supply, SEM

Liver blood supply. Coloured scanning electron micrograph (SEM) of several capillaries running through liver tissue. The functions of the liver include destroying old red blood cells, breaking down harmful waste products and toxins in the blood, and extracting useful nutrients from the blood to make and store proteins and other useful chemicals. Numerous capillaries, veins and arteries supply and remove blood. The structure of the liver tissue allows the blood to percolate through the tissue. At any one moment, the liver holds over 10 percent of the body's blood supply


Sunflower pollen, SEM Featured 29 Nov 2005 Print

Sunflower pollen, SEM

Sunflower pollen grains. Coloured scanning electron micrograph (SEM) of pollen grains from the sunflower (Helianthus annuus). The grains have a spiked outer wall (exine), which may assist in their dispersal by improving their adherence to pollinating insects. The characteristic surface of pollen grains is used by botanists to recognise and classify plants. Each pollen grain contains a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete), and initiate the formation of a seed for a new plant. Magnification: x2100 when printed at 10 centimetres tall