nanometres
61nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
62COLLAGÈNE — De nature glycoprotidique, le collagène est une macromolécule fibreuse, très répandue dans le règne animal et qui, chez l’homme, représente approximativement un tiers des protéines de l’organisme. Il est plus exact de parler des collagènes, car… …
63RÉTROVIRUS — Les rétrovirus sont des virus globulaires enveloppés, d’un diamètre de 110 à 125 nanomètres, très répandus dans le monde animal. Ils sont la cause de différentes formes de cancer, d’immunodéficiences, dont le sida, et de dégénérescences du… …
64SYNCHROTRON (RAYONNEMENT) — Toute particule chargée soumise à une accélération émet des ondes électromagnétiques. Cet effet est à la base des communications «sans fil», puisque les ondes sont émises par des électrons qui oscillent le long des antennes. Les propriétés de… …
65Litre — One litre is equivalent to this cube Each side is 10 cm 1 litre water = 1 kilogram water (at 4 °C) The litre (or liter  see spelling differences) is a unit of volume equal to 1 cubic decimetre (dm3), to 1,000 cubic centimetres… …
66Ultraviolet — UV redirects here. For other uses, see UV (disambiguation). UVB redirects here. For the mysterious shortwave radio station in Russia, see UVB 76. For other uses, see Ultraviolet (disambiguation). False color image of the Sun s corona as seen in… …
67Turquoise — For other uses, see Turquoise (disambiguation). Turquoise Turquoise (tumble finished) one inch (25 mm) long. This pebble is greenish and therefore low grade General …
68Interstellar medium — Interstellar redirects here. For other uses, see Interstellar (disambiguation). The distribution of ionized hydrogen (known by astronomers as H II from old spectroscopic terminology) in the parts of the Galactic interstellar medium visible… …
69Nano- — This article describes the SI prefix. For other meanings, see Nano. Nano (symbol n) is a prefix meaning a billionth. Used primarily in the metric system, this prefix denotes a factor of 10−9 or 0.000000001. It is frequently encountered in science …
70Thin film — A thin film is a layer of material ranging from fractions of a nanometer (monolayer) to several micrometers in thickness. Electronic semiconductor devices and optical coatings are the main applications benefiting from thin film construction. A… …
