An ordinary Petri net is a bipartite directed graph composedof places, drawn as circles, and transitions, drawn as bars. A formal denitionfollows [3]:Denition 2.1 An ordinary Petri Net (PN) is a 5-tuplePN = (P;T;I ;I + ;M 0) where:1. P = fp 1 ;p 2 ;:::;p n gis a nite and non-empty set of places,2.
The Colors of Geraniums. Geraniums come in a host of colors, from the traditional white, red and pink to the more exotic orange and purple. Geraniums (Pelargonium spp.) are popular garden favorites that can be cultivated throughout all the USDA hardiness zones as annuals or year-round as indoor plants.
There are in fact two species of Pelargonium distilled to essential oil-this 'odorantissium' produces Rose Geranium oil, high in geraniol with a more ' rose-like' aroma. The 'graveolens' species produces an oil with a higher citronellol content, with a correspondingly more citrus-like aroma.alte Hozzel on Rose Geranium Essential Oil: Geranium's vital, sensual presence is not subtle, but direct & unavoidable, making it one of the oils of choice for aphrodisiac qualities.