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In organic chemistry, spherical aromaticity is formally used to describe an unusually stable nature of some spherical compounds such as fullerenes and polyhedral boranes. In 2000, Andreas Hirsch and coworkers in Erlangen , Germany , formulated a rule to determine when a spherical compound would be aromatic .
Spherical fullerenes are also called buckyballs, and they resemble the balls used in football (soccer). Fullerenes are similar in structure to graphite, which is composed of stacked graphene sheets of linked hexagonal rings; but they may also contain pentagonal (or sometimes heptagonal) rings.
Fullerenes had been predicted for some time, but only after their accidental synthesis in 1985 were they detected in nature [3] [4] and outer space. [5] [6] The discovery of fullerenes greatly expanded the number of known allotropes of carbon, which had previously been limited to graphite, diamond, and amorphous carbon such as soot and charcoal.
This page is a sortable table of plants used as herbs and/or spices.This includes plants used as seasoning agents in foods or beverages (including teas), plants used for herbal medicine, and plants used as incense or similar ingested or partially ingested ritual components.
Talinum fruticosum is a herbaceous perennial plant that is native to Mexico, the Caribbean, West Africa, Central America, and much of South America.Common names include Ceylon spinach, [2] waterleaf, cariru, Gbure, Surinam purslane, Philippine spinach, Florida spinach, potherb fameflower, Lagos bologi, sweetheart, and Kutu bataw in Ghana from the Akan language [1] It is widely grown in ...
The leaf blade is slender, 35–100 cm (14–39 in) long, gray-green, with a toothed margin. The leaves radiate from the center of the plant's apex in all directions (spherical). Blooming from May to July, the flowering stem grows above the foliage, to a height of 5 m (16 ft) tall [1] and a diameter of 3 cm (1 + 1 ⁄ 4 in).
It is a herbaceous perennial plant growing to 0.3–1 m tall. The leaves are lanceolate to ovoid-acute, 20–75 mm long and 10–35 mm wide. The flowers are two-lobed, the long axis up to 50 mm long; they are magenta to reddish-violet.
The designation greenthread is most appropriate, as it has thin, thread-like leaves. It can be single-stemmed or multi-stemmed, and reaches a height of 12 to 26 inches. The leaves are scattered along the whole stem. The daisy-like, 2 inch, eight-ray flowers are golden-yellow and the numerous disk flowers are reddish to dark brown. The urn ...