Download tubifex worms3/2/2024 Leeches are flattened and usually move by swimming or by “looping” inchworm-like with front and back suckers.Adult horsehair worms are not segmented and are usually quite long for their width they move by bending, not by stretching and pulling.Midge larvae are insects and have distinct heads, leglike appendages, and often feathery structures. Thus red tubificid worms and red midge fly larvae are both sometimes called bloodworms. But the wormlike larvae of some midge flies (family Chironomidae) also possess hemoglobin and are also red. Some tubificid worms are bright red: they contain hemoglobin, the same oxygen-carrying molecule humans have in our red blood cells.They move like earthworms, by stretching and pulling. There are many species most are red, tan, brown, or black. They lack legs, head, and readily seen mouthparts. Study paves the way towards a new research field of `living polymers'.Aquatic worms with segmented, earthworm-like bodies that are round in cross-section (not flattened). Scale of the activity, and (iii) the low shear viscosity as a function ofĬoncentration shows a very different scaling from that of regular polymers. We find that (i) shear thinning is reduced by activity, (ii) theĬharacteristic shear rate for the onset of shear-thinning is given by the time Temperature or by adding small amounts of alcohol to make the worms temporarily Its level of activity can be controlled by changing the Here we experimentally study the rheology of long, slender andĮntangled living worms (Tubifex tubifex) and propose this system as a new type Where the coupling of filament activity, hydrodynamic interactions, andĬonformations open the way to a plethora of novel structural and dynamicalįeatures. Situation is markedly different when we move from passive to active polymers Polymers allows us to predict for instance the shear-thinning rheology and theīehaviour in virtually any flow situation of practical importance. In-depth insight into the entanglement and reptation of individual Tubifex Worms, by Antoine Deblais and 2 other authors Download PDF Abstract: Of all complex fluids, it is probably the rheology of polymers we understandīest. Download a PDF of the paper titled Rheology of Active Polymer-like T.
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