IYL 2015 Images

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    Levisticum

    If you come across levisticum in a garden, you will find a tall plant with dark green leaves and greenish-yellow flowers. Under a microscope, however, it looks much different. Here polarized light is used to bring out the details of this plant on the microscopic level. Polarization is used for many things, including sunglasses. This type of sunglasses blocks most light oriented in a horizontal direction (which often happens when light is reflected from a flat road or smooth water). Under a microscope, polarized light can help us see more by bringing out the contrast between structures and other details otherwise difficult to see in unpolarized light.
    Image Credit: Marek Mís
    view and download image here. http://lightexhibit.org/photoindex.html

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    Micrograph Of Algae and Moss

    This photomicrograph—an image taken through a microscope and captured with a camera—features an up close look at green algae and moss. The technique used to enhance the contrast in this photomicrograph is called "darkfield." To do this, a photographer excludes some of the light that enters the field of view so that very little light falls on anything except the specimen. This makes the field around the main targets darker, thus making the contrast more striking.
    Image Credit: Marek Mís
    view and download image here. http://lightexhibit.org/photoindex.html

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    Astrocyte Brain Cells

    Astrocytes are the star-shaped cells found in spinal cord and the brain. In fact, they are the most abundant cells in the human brain. In this image of astrocytes, the nucleus of each cell has been stained blue while the cytoplasm (the fluid that fills the cell) has been colored green. To achieve this, the process of immunofluorescence was used. Immunofluorescence is a staining technique that uses antibodies to attach fluorescent dyes to specific tissues and molecules in the cell.
    Image Credit: Nancy Kedersha/Science Photo Library
    view and download image here. http://lightexhibit.org/photoindex.html

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    White Matter Fibers

    While most people are familiar with "grey matter" associated with the brain, many people may not know about white matter. This is a network, made up of nerve fibers, that connects different parts of the brain and spinal cord to one another. This image was made using diffusion spectrum imaging (DSI), which is a variant of magnetic resonance imaging. In DSI, radio waves from water molecules energized by a magnetic field map the water contained in neuron fibers, which, in turn, reveals their criss-crossing patterns. Scientists are using this technique and others like it to make a comprehensive map of neural connections—a "wiring diagram," so to speak—in the brain.
    Image Credit: ALFRED PASIEKA www.alfred-pasieka.de
    view and download image here. http://lightexhibit.org/photoindex.html

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    Vorticella

    Protozoa are single-celled animals found throughout the world in many different habitats. The name protozoa means "first animals," and they play a key role in maintaining and balance of bacteria, algae, and other microbial life. This photograph illuminates one particular type of protozoa called vorticella. In this image, a technique called "dark field microscopy" was used. This technique blocks out the direct light from the source, so that only light scattered by the specimen is observed, enabling brilliant bright images to be seen again a dark background. This is one way that light can reveal the fascinating and beautiful members of the microbe world.
    Image Credit: Frank Fox, www.mikro-foto.de
    view and download image here. http://lightexhibit.org/photoindex.html