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Catechu (/ˈkætɨʃuː/ or /ˈkætɨtʃuː/)[1] is an extract of acacia trees used variously as a food additive, astringent, tannin, and dye. It is extracted from several species of Acacia, but especially , Senegalia catechu (Acacia catechu), by boiling the wood in water and evaporating the resulting brew.[2] It is also known as cutch, black cutch, cachou, cashoo, khoyer, terra Japonica, or Japan earth, and also katha in Hindi, kaath in Marathi, khoyer in Assamese and Bengali, and kachu in Malay (hence the Latinized [3]Acacia catechu chosen as the Linnaean taxonomy name of the type-species Acacia plant which provides the extract).
As an astringent it has been used since ancient times in Ayurvedic medicine as well as in breath-freshening spice mixtures—for example in France and Italy it is used in some licorice pastilles. It is also an important ingredient in South Asian cooking paan mixtures, such as ready-made paan masala and gutka.
The catechu mixture is high in natural vegetable tannins (which accounts for its astringent effect), and may be used for the tanning of animal hides. Early research by Sir Humphry Davy in the early 19th century first demonstrated the use of catechu in tanning over more expensive and traditional oak extracts.
Under the name cutch, it is a brown dye used for tanning and dyeing and for preserving fishing nets and sails. Cutch will dye wool, silk, and cotton a yellowish-brown. Cutch gives gray-browns with an iron mordant and olive-browns with a copper mordant.[4]
White cutch, also known as gambier, gambeer, or gambir, which is extracted from Uncaria gambir[6] has the same uses.
Derivative chemicals[edit]
The catechu extract gave its name to the catechin and catechol chemical families first derived from it.
See also[edit]
Iusaset (/juːˈsæsɛt/; "the great one who comes forth") or Iusaas /aɪˈjuːsəs/ is the name of a primal goddess in Ancient Egyptian religion. She also is described as "the grandmother of all of the deities". This allusion is without any reference to a grandfather, so there might have been a very early, but now lost, myth with parthenogenesis as the means of the birth of the deities from the region where her cult arose near the delta of the Nile. Many alternative spellings of her name include Iusaaset, Juesaes, Ausaas, and Jusas, as well as in Greek Saosis /ˌseɪˈoʊsɨs/.
Art[edit]
In Ancient Egyptian art, Iusaaset appears as a woman wearing the horned vulture crown with the uraeus and the solar disk in it, and she carries an ankh in one hand and a scepter in the other. The Egyptian vulture, most sacred to the ancient Egyptians and symbolizing Nekhbet, one of the Two Ladies protecting Egypt, was thought to reproduce though parthenogenesis also. This association might be the basis for the similar view about the motherhood of Iusaaset. The vultures also were considered extremely good mothers. The horns, the uraeus, and the solar disk make a religious connection to Batand Hathor.
Because of Iusaaset’s link to the vulture and uraeus, it can be assumed that she links together both upper and lower Egypt, much like the goddess Mut who she is also associated with.
Although her origins are unclear, Iusaaset seems to be attested quite early in the Egyptian pantheon, being associated with creation and the creation of the deities. Many myths relate that she was seen as the mother of the first deities and the grandmother of the following deities, having watched over the birth of the ones that were her grandchildren. She remains as a primary deity in the pantheon throughout all eras of the culture, even through the Persian, Hyksos, Greek, and Roman occupations, and regardless of changes in the specific myths.
Association with acacia tree[edit]
Iusaaset was associated with the acacia tree,[1] considered the tree of life, and thus with the oldest one known being situated just north of Heliopolis and, thereby, which became identified as the birthplace of the deities. Iusaaset was said to own this tree. The acacia tree was renowned for its strength, hardiness, medical properties, and edibility. Many useful applications gave it a central importance in the culture.
Changes in myths[edit]
One belief held that Iusaaset and Atum (Ra) were the parents of Shu and Tefnut, the first deities. In this myth she often was described as his shadow, sister, or wife. Later other goddesses also became associated with Atum and one variant even relates that he gave birth to the deities, although that variant seems to have been rejected by many cultural and religious centers.
During the Old Kingdom the Egyptians believed that Atum lifted the dead pharaoh's soul from the tomb to the starry heavens.[2] By the time of the New Kingdom, the Atum myth had merged in the Egyptian pantheon with that of Ra, who later was described as a creator and a solar deity as his cult arose. Their two identities were joined into Atum-Ra. After they were combined, Ra was seen as the whole sun and Atum came to be seen as the sun when it sets in the west (depicted as an old man leaning on his staff), while Khepri was seen as the sun when it was rising.
