since facebook aparrently doesn’t allow animated profile pictures, i figured i’d share this here instead:
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.
Posts Tagged ‘animation’
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)
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
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.
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
there are lots more pictures available, i’ll hope to find the time to upload them.
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:
last week, i took part in a practical class dealing with specific kinds of microscopy – namely confocal laser scanning microscopy (CLSM) and transmission electron microscopy (TEM).
while we’re still waiting for the results of the second part, we’ve had plenty of time to play around with the CLSM.
here’s one of the numerous animations:
it shows part of a leaf of arabidopsis thaliana, that was genetically modified in a way that makes certain structure molecules within the cell walls visible.
to be more specific, the sequences of the green fluorescent protein (GFP, originally a gene of the crystal jellyfish, aequorea victoria) and a corresponding microtubule binding domain were inserted into the plant’s DNA, so that the cell walls would emit green light when exposed to light of a particular frequency (not all cells actually produced these molecules).
autofluorescense of chloroplasts is displayed in red.
using the CLSM, about 20 images were recorded at different levels of the leaf. these layers were then rendered in an animation that highlights its tridimensionality.
the image width equals 150 μm, that’s approx. 1/7th of a millimeter.
this was recorded a few days ago, and just has just been merged into an animated gif:
i’ve added a little black dot to demonstrate how the caterpillar actually moves forward (even though this animation is an infinite loop).
