Lionwood Junior Project – Nov 2012 - Dust

Images

Dust mite, SEM - Z445/0328 Power and Syred, SPLCaption: Dust mite. Coloured scanning electron micrograph (SEM) of a dust mite (Dermatophagoides sp.) on the threads of a piece of fabric. The mite's head is at lower right. Millions of dust mites inhabit the home, feeding on shed skin cells. They mainly live in furniture, and are usually harmless. However, their excrement and dead bodies may cause allergic reactions in susceptible people. Magnification: x1725 at 6x7cm size.

Pollen grains, SEM - C012/4970 AMI Images, SPLCaption: Pollen grains. Coloured scanning electron micrographs (SEM) of pollen grains from a variety of plants. Including: sunflower (Helianthus annuus), morning glory (Ipomea purpurea), hollyhock (Sildalcea malviflora), lily (Lilium auratum), primrose (Oenothera fruticosa), and caster bean (Ricinus communis).

House dust - living room, SEM - C011/5072 Eye of science, SPLCaption: House dust. Coloured scanning electron micrograph (SEM) of a sample of dust from a living room shelf. This sample contains: cotton fibres (blue), plant matter (green), animal material (dander, beige), pollen (yellow), mineral particles (grey), various fibres (red), and hair (brown). Magnification: x107 when printed 10 centimetres wide.

House dust - bedroom, SEM - C011/5074 Eye of Science, SPLCaption: House dust. Coloured scanning electron micrograph (SEM) of a sample of dust from a bedroom. This sample contains: a spring (white), cotton fibres (blue), hair (brown), plant matter (green), animal material (dander, beige), pollen (reddish), and soil (brown). Magnification: x60 when printed 10 centimetres wide.

House dust - kitchen, SEM - C011/5073 Eye of science, SPLCaption: House dust. Coloured scanning electron micrograph (SEM) of a sample of dust from a kitchen. This sample contains: a sugar crystal (upper right), the wing of an insect (lower left), cotton fibres (blue), flour (beige), starch grains (white), and other particles of plant origin. Magnification: x70 when printed 10 centimetres wide.

Human hair SEM - C014/0306 Pascal Goetgheluck, SPLCaption: Human hair. Coloured scanning electron micrograph (SEM) of a strand of human hair. Hairs are made up of dead tissue. The outside of the hair, the cuticle, is covered in overlapping scales that protect the hair's central cortex, which is made up of the fibrous protein keratin.

Allergens in trachea - M320/0156 Eddy Gray, SPLCaption: Trachea covered in allergens. Coloured Scanning Electron Micrograph (SEM) of the surface of the trachea (windpipe) with breathed in pollen and dust. These airborne particles may cause asthma or hay fever (allergic rhinitis). Pollen grains are coloured pink. The surface of the trachea is made up of cells with hair-like cilia (yellow). Together with mucus, these cilia serve to trap airborne particles and by beating upwards in a wave-like motion they remove foreign matter from the air tubes and lungs. In asthmatic or allergic patients, such particles may lead to a hyper- sensitive reaction causing breathing difficulties. Magnification: x2,000 at 6x7cm size. x6,500 at 8x10"

Eosinophil white blood cell, TEM - C014/1437 Steve Gschmeissner, SPLCaption: Eosinophil white blood cell. Transmission electron micrograph (TEM) of a section through an eosinophil. Eosinophils, like all white blood cells, are part of the body's immune system. They are involved in the body's allergic response and help to defend the body from invading parasites. The cell's cytoplasm contains many characteristic granules (yellow) that contain enzymes used to destroy invading organisms. Magnification: x5000 when printed 10 centimetres wide.

Flakes of dead skin, SEM - C001/1720 Steve Gschmeissner, SPLCaption: Flakes of dead skin. Coloured scanning electron micrograph (SEM) of dead skin from the scalp (dandruff), a condition where there is an excessive shedding of dead skin cells. Dandruff can be the result of psoriasis, a fungal infection, or the overproduction of sebum, the secretion from sebaceous glands associated with hair follicles. Magnification: x35 when printed at 10 centimetres wide.

All images from Science photo library – no permission to use as yet!

Science session – dust detectives!

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Writing

Historian, Samuel O’Rourke

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Art

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Dustmite habitat quiz to build the scene..

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School display

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