tag archives: animation

stellate parenchyma [photo and animation]

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stellate parenchyma is a form of aeration tissue (aerenchyma) in plants, which helps with internal air circulation in plants. the tissue is typical of aquatic and wetland plants, and consists of cells with large intercellular spaces that allow air supply to underwater plant parts.

stellate parenchyma (aerenchyma) of juncus sp.

due to the very narrow depth of field at high magnification, the picture is actually a focus stack of 22 combined layers. to get a feeling for the three-dimensional structure of this anatomical section, check out the animation below: [more...]

[categories: nature, photo] [tags: , , , ]

photo: spider wasp in action – when the hunter becomes the prey

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spider wasps (pompilidae) are – in a nutshell – really badass insects.
to provide food for their larvae, these wasps go hunting for spiders that are usually bigger than themselves. spiders are paralysed, placed in a small burrow or tunnel, and used as fresh food for a single egg/larva that is laid into them just before the nest is closed.

a spider wasp (pompilidae) carrying its paralysed spider prey

carrying something around that’s heavier than yourself is obviously quite a bit of work. here’s a short image sequence which shows how the wasp hauls its prey across the ground: [more...]

animation: watching hair grow

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since facebook aparrently doesn’t allow animated profile pictures, i figured i’d share this here instead:

a little "project" i did in 2004/2005

it’s the animated gif-version of a little “project” i did in 2004/2005, basically a 12-month time-lapse video with awful temporal resolution.

[category: time lapse] [tags: , , ]

animation: anatomical drawing

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this little animation shows the development of an anatomical drawing that i did during a zoology class a few years ago. the reconstruction is part of a university project for the biology younglings. ;)

animation: anatomical drawing of an earthworm (lumbricus terrestris)
animation: anatomical drawing of an earthworm (lumbricus terrestris)
[category: nature] [tags: , ]

animation: venus flytrap

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this animation was done as a request. a friend needed such a file for her presentation, but couldn’t find one on the internets…

animation: a venus flytrap (dionaea muscipula) closes
animation: a venus flytrap (dionaea muscipula) closes

venus flytraps belong to the interesting family of droseraceae, which consists of carnivorous plants.
in order to attract prey, the traps are usually of a reddish color and contain nectar producing glands.
as soon as an insect lands on the traps and stimulates a one of the trigger hairs, the lobes are closed. trying to escape, the trapped insect further stimulates the inner surface of the lobes, and the plant starts to produce digestive enzymes.

in their wild habitats (bogs, wet svannahs), venus flytraps and other carnivorous plants find hardly any nutrients (especially nitrogen), so they have evolved to actually catch and digest insects.

[view photos: venus flytrap]

[categories: nature, photo] [tags: ]

snippet from university: differencial interference contrast microscopy animation

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nature often keeps me busy concentrating to not just stare at something with an open mouth.
in a recent class, we looked at developmental stages of plant embryos, from the zygote to a fully grown embryo inside a mature seed.

the animation below shows a young embryo that is being formed inside the ovule (entire structure). it will grow from a single cell to a complete, viable plant embryo, and the surrounding space will be filled with nutrients and storage substances that will give the little germinating seed the best chances possible.

animation: globular embryo (arrow) in an ovule of capsella bursa-pastoris. differencial interference contrast microscopy and herr-prepared specimen
animation: globular embryo (arrow) in an ovule of capsella bursa-pastoris.
differencial interference contrast microscopy and herr-prepared specimen

there are lots more pictures available, i’ll hope to find the time to upload them.

day and night

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browsing through the photos from vienna, i found two very similar pictures of the church of st. charles in vienna – one taken in daylight, the other one 2.5 hours later, after sunset.
here’s a 5-step gradual blend:

[category: photo] [tags: ]