1 You have signs of infection, such as: 2  Increased pain, swelling, warmth, or redness around the bite. 3  Red streaks leading from the bite. 4  Pus draining from the bite.  A fever.
A negative index of refraction due to three-dimensional chirality is demonstrated for abilayered metamaterial based on pairs of mutually twisted planar metal patterns in parallel planes, which alsoshows negative electric and magnetic responses and exceptionally strong optical activity and circular dichro-ism.
At the CNP, a strong electrical resonance was observed with a peak refractive index of 13.8 at a frequency of 0.58 THz and a refractive index of 12.1 at the quasi-static limit where the loss of the metamaterial is minimal.