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Electrical Penetration Graph
The electrical penetration graph or EPG is a system used by biologists to study the interaction of insects such as aphids, thrips, and leafhoppers with plants. Therefore, it can also be used to study the basis of plant virus transmission, host plant selection by insects and the way in which insects can find and feed from the phloem of the plant. It is a simple system consisting of a partial Electronic circuit, circuit which is only completed when a species such as aphids, which are the most abundantly studied, inserts its stylet (anatomy), stylet into the plant in order to ''probe'' the plant as a suitable host for feeding. The completed circuit is displayed visually as a graph with different waveforms indicating either different insect activities such as saliva excretion or the ingestion of cellular contents or indicating which tissue type has been penetrated (i.e. phloem, xylem or Leaf#Mesophyll, mesophyll). So far, around ten different graphical waveforms are known, correlating wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orosius Orientalis EPG
Paulus Orosius (; born 375/385 – 420 AD), less often Paul Orosius in English language, English, was a Western Roman Empire, Roman priest, historian and theology, theologian, and a student of Augustine of Hippo. It is possible that he was born in ''Bracara Augusta'' (now Braga, Portugal), then capital of the Roman province of Gallaecia, which would have been the capital of the Kingdom of the Suebi by his death. Although there are some questions regarding his biography, such as his exact date of birth, it is known that he was a person of some prestige from a cultural point of view, as he had contact with the greatest figures of his time such as Augustine of Hippo and Jerome of Stridon. In order to meet with them Orosius travelled to cities on the southern coast of the Mediterranean Sea, such as Hippo Regius, Alexandria, and Jerusalem. These journeys defined his life and intellectual output. Orosius did not just discuss theological matters with Augustine; he also collaborated wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
