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Calendar . Subjects 2014

Hidden Cosmos (Meckes & Ottawa)

This year we offered two REM-calendars: Find more here (Martin Oeggerli) 2014 Hidden Cosmos
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Charcoal

IIn this piece of broken charcoal the cell walls are still very well-preserved. The transfer cells (tracheae) have broken at an angle showing the structure of the sieve tubes (phloem).

Scanning Electron Microscope, magnification 1.200:1
Shell Amoeba

The shell amoebas of the type Trinema form a bowl from roofing, tile-like, overlapping silicate scales which are connected by an organic cement. In the living state pseudopodia, foot-like extensions, emerge from the dentated opening of the amoeba. Using these extensions it draws in bacteria, smaller protozoan, or algae for food.

Scanning Electron Microscope, magnification 14.000:1
Anthrax bacteria

Endospores are recognizable as dark areas in this ultra thin section of the Bacilli anthracis. These long-term forms of bacteria are extremely heat-stable and resistant, with an ability to survive centuries. Their use as a bioweapon in the form of an aerosol is possible.

Transmission Electron Microscope, magnification 52.000:1
Leaf with chloroplasts

Here a freeze fracture image (Tanaka break) shows a section through a leaf of the black night shade (Solanum nigrum). The chloroplasts (green) are seen through the cell walls in a fractured state. Inside the chloroplasts the light reactions of photosynthesis take place.

Scanning Electron Microscope, magnification 4.600:1
Ladybird

This picture shows the maxillary palpus in the oral area of a ladybird (0). The palpus is extensively covered with sensory hairs and cells which are used to check the smell, taste and state of food. The compound eye is seen in the background at top.

Scanning Electron Microscope, magnification 1.450:1
Heat accumulator

Sodium nitrate (sodium saltpetre, Chile salpetre) is the sodium salt of nitric acid. In its pure state it has the shape of a hygroscopic white substance or colourless crystals. It finds varied applications, e.g. as a preservative (E 251), brine salt, cement additives, fertilizer or for thermal storage.

Scanning Electron Microscope, magnification 1.150:1
Green plant louse

The picture shows green lice, or aphids (Aphidida) on a bean leaf. The proboscis, clearly recognized here, is used to suck the juice of leaves or stipes, causing great damage to the plant. These small insects belong to the Hemiptera to which cicadas and bugs are also assigned.

Scanning Electron Microscope, magnification 320:1
Nervous system

The picture shows dorsal root ganglia nerve cells of a rat and the way they spread out in a cell culture. In the body these neurons sit outside the spinal cord and lead information like pain and touch sensations of the body to the brain. The projection (axons) of these cells can be up to a meter long.

Scanning Electron Microscope, magnification 620:1
Solar cell

This solar cell from mono-crystalline silicone was micro etched on the surface to raise the efficiency of the solar cell. A solar cell or photovoltaic cell is an electric device that converts short-wave radiant energy, normally sunlight, directly into electric energy.

Scanning Electron Microscope, magnification 11.500:1
Pulmonary tissue

Section through lung tissue showing alveoli (hollows), an arterial blood vessel (red, top middle), and a bronchius (airway, centre). Alveoli are tiny airsacs where gas exchange takes place. Oxygen from inhaled air is taken up by the blood and carbon dioxide is released to be exhale.

Scanning Electron Microscope, magnification 460:1
Oak processionary caterpillar

The processionary spinners received their name because the caterpillars of this butterfly move successively in long processions in search of new food sources. Its body is covered with defensive bristles which can cause strong skin irritation, allergies and asthma in humans.

Scanning Electron Microscope, magnification 140:1
Dyer’s Chamomile Pollen

Pollen is the bearer of the male hereditary material in plants. The prickles of the Yellow Chamomile stick to the hairs of insects enabling the transfer of pollen from flower to flower. The Yellow Chamomile (Anthemis tinctoria) is grown as a yellow coloring for textiles.

Scanning Electron Microscope, magnification 4.200:1
© copyright O. Meckes & N. Ottawa, eye of science
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