5. A toothpick made from the stem of a feather. 6. One of the sharp hollow spines of a porcupine or hedgehog. 7. A spindle or bobbin around which yarn is wound in weaving. 8. A hollow shaft that rotates on a solid shaft when gears are engaged. v. quilled, quill·ing, quills ...
The article discusses research on the use of porcupine quills to develop adhesives, needles and other medical devices. It references a study by Robert Langer and colleagues, published in the "...
Failure analysis of porcupine quills under axial compression reveals their mechanical response during bucklingdoi:10.1016/j.jmbbm.2014.07.017Porcupine quillsFailure mechanismBucklingDelaminationAbstract Porcupine quills are natural structures formed by a thin walled conical shell and an inner foam core. Axial...
The quills of a porcupine are not toxic but can be extremely painful and cause injuries. Also, a porcupine cannot project or shoot out its quills towards the enemy as it was initially believed. When the porcupine wants to defend itself, it will raise and shake its quills. This behavior ...
The meaning of QUILL is a bobbin, spool, or spindle on which filling yarn is wound. How to use quill in a sentence.
feature that made it famous is the porcupine's 2 to 3-inch long hollow quills. These quills are not thrown; that's just a myth. In reality, their quills arelooselyattached to their bodies, so when a predator sticks its nose too close, it comes away with a face full of porcupine ...
Tensile deformation and failure of North American porcupine quills. Mater. Sci. Eng. C 31, 1729-1736. http://dx.doi.org/10.1016/j. msec.2011.08.002.Chou, S.F., Overfelt, R.A., 2011. Tensile deformation and failure of North American porcupine quills. Mater. Sci. Eng. C 31, 1729-...
a Several times, I have found the remains of quills where a tiger has killed and eaten a porcupine, but I have never actually seen the kill.In spite of the quills, experienced tigers will try to kill cleanly by biting the porcupine's head, its weakest spot.But the quills are very ...
Porcupine quills possess antibiotic properties. The antibiotic activity is associated with free fatty acids (but not neutral lipids) coating the quills. Extracts of quill fatty acids strongly inhibited the growth of six grampositive bacterial strains. No growth inhibition was observed against four gram...
细节理解题,第二段第二行,porcupine ran as fast as he could and climbed to the top of a tall tree,为第三点;第三段最后一行,but he got badly hurt 为第一点;最后一段第二行,he decided to give quills to the animal. that was how porcupine got its quills,为第二点。按照时间顺序为三一二。