Non-hexagonal-ring defects and structures induced by strain in graphene and in functionalized graphene

We perform {\textit ab initio} calculations for the strain-induced formation of non-hexagonal-ring defects in graphene, graphane (planar CH), and graphenol (planar COH). We find that the simplest of such topological defects, the Stone-Wales defect, acts as a seed for strain-induced dissociation and multiplication of topological defects. Through the application of inhomogeneous deformations to graphene, graphane and graphenol with initially small concentrations of pentagonal and heptagonal rings, we obtain several novel stable structures that possess, at the same time, large concentrations of non-hexagonal rings (from fourfold to elevenfold) and small formation energies

Multiple Photonic Shells Around a Line Singularity

Line singularities including cosmic strings may be screened by photonic shells until they appear as a planar wall.Comment: 6 page

Espécies de Anastrepha Schiner (Diptera: Tephritidae), seus hospedeiros e parasitóides nos Estados do Acre e Rondônia, Brasil.

Durante o mês de março de 2009 foram realizadas amostragens de frutos carnosos nos Estados do Acre (municípios de Brasiléia, Bujari, Capixaba, Epitaciolândia, Rio Branco, Sena Madureira, Senador Guiomard e Xapuri) e Rondônia (Ariquemes, Candeias do Jamari, Itapuã do Oeste, Ouro Preto do Oeste e Porto Velho) visando ampliar o conhecimento sobre a diversidade de moscas-das-frutas (Diptera: Tephritidae), seus hospedeiros e parasitóides. Este trabalho constitui o primeiro registro de Anastrepha coronilli Carrejo & González (Tephritidae) para o Estado do Acre, e das espécies A. coronilli, A. distincta Greene (Tephritidae), e dos himenópteros Doryctobracon areolatus (Szépligeti) e Opius bellus Gahan (Braconidae) para Rondônia. Palavras-chave: Amazônia, Braconidae, Hymenoptera, moscas-das-frutas, Tephritoidea