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Frankincense (Boswellia sacra)

Inside the various climates of the Princess of Wales Conservatory at Kew Gardens ...

 

From Wikipedia -

Frankincense, also called olibanum (Arabic: لُبَّانٌ, lubbān; Chinese: 乳香 Ru Xiang; Somali: luubaan; Hindi: धुप Dhoop; Hebrew: לבונה, levonah), is an aromatic resin obtained from trees of the genus Boswellia, particularly Boswellia sacra, B. carteri, B. thurifera, B. frereana and B. bhaw-dajiana (Burseraceae). The English word is derived from old French "franc encens" (i.e. high quality incense) and is used in incense and perfumes.

 

There are four main species of Boswellia that produce true frankincense and resin from each of the four is available in various grades. The grades depend on the time of harvesting. The resin is hand-sorted for quality.

 

Frankincense can also be found in the Bible as one of the three gifts the wise men gave to baby Jesus.

 

Frankincense is tapped from the scraggly but hardy trees by slashing the bark, which is called striping, and allowing the exuded resin to bleed out and harden. These hardened resins are called tears. The aroma from these tears are more valuable for their presumed healing abilities and are also said to have superior qualities for religious ritual.

 

There are several species and varieties of frankincense trees, each producing a slightly different type of resin. Differences in soil and climate create even more diversity of the resin, even within the same species. Boswellia Sacra trees are considered unusual for their ability to grow in environments so unforgiving that they sometimes grow out of solid rock. The initial means of attachment to the rock is unknown but is accomplished by a bulbous disk-like swelling of the trunk. This growth prevents it from being ripped from the rock during violent storms that frequent this region. This feature is slight or absent in trees grown in rocky soil or gravel. The trees start producing resin when they are about eight to 10 years old. Tapping is done two to three times a year with the final taps producing the best tears due to their higher aromatic terpene, sesquiterpene and diterpene content. Generally speaking, the more opaque resins are the best quality. Fine resin is produced in Yemen and along the northern coast of Somalia, from which the Roman Catholic Church draws its supplies.

 

Recent studies have indicated that frankincense tree populations are declining, partly due to over-exploitation. Heavily tapped trees produce seeds that germinate at only 16% while seeds of trees that had not been tapped germinate at more than 80%. In addition, burning, grazing, and attacks by the longhorn beetle have reduced the tree population. Conversion (clearing) of frankincense woodlands to agriculture is also a major threat.

 

Frankincense is used in perfumery and aromatherapy. It is also an ingredient that is sometimes used in skincare. The essential oil is obtained by steam distillation of the dry resin. Some of the smell of the frankincense smoke are products of pyrolysis.

 

Frankincense is used in many Christian churches including the Eastern Orthodox, Oriental Orthodox and Catholic churches. According to the gospel of Matthew 2:11, gold, frankincense, and myrrh were among the gifts to Jesus by the biblical magi "from out of the East." The Judaic, Christian and Islamic faiths have all used frankincense mixed with oils to anoint newborn infants, initiates, and members entering into new phases of their spiritual lives.

 

Conversely, the growth of Christianity depressed the market for frankincense during the 4th century AD. Desertification made the caravan routes across the Rub' al Khali or "Empty Quarter" of the Arabian Peninsula more difficult. Additionally, increased raiding by the nomadic Parthians in the Near East caused the frankincense trade to dry up after A.D. 300.

 

Traditional medicine[edit]

 

Frankincense resin is edible and is used in traditional medicines in Asia for digestion and healthy skin. For internal consumption, it is recommended that frankincense be translucent, with no black or brown impurities. It is often light yellow with a (very) slight greenish tint. It is often chewed like gum, but it is stickier.

 

In Ayurvedic medicine Indian frankincense (Boswellia serrata), commonly referred to as "dhoop," has been used for hundreds of years for treating arthritis, healing wounds, strengthening the female hormone system and purifying the air. The use of frankincense in Ayurveda is called "dhoopan". In Indian culture, it is suggested that burning frankincense daily in the house brings good health.

 

The essential oil of frankincense is produced by steam distillation of the tree resin. The oil's chemical components are 75% monoterpenes, sesquiterpenes, monoterpenoles, sesquiterpenols, and ketones. It has a good balsamic sweet fragrance, while the Indian frankincense oil has a very fresh smell. Contrary to recent claims, steam or hydro distilled frankincense oil does not contain any boswellic acid as these components (triterpenoids) are non-volatile and too large to come over in the steam distillation process. The chemistry of the essential oil is mainly monoterpenes and sesquiterpenes with small amounts of diterpenoid components being the upper limit in terms of molecular weight.

 

Olibanum is characterized by a balsamic-spicy, slightly lemon, fragrance of incense, with a conifer-like undertone. It is used in the perfume, cosmetic and pharmaceutical industries.

 

These are some of the chemical compounds present in frankincense -

"acid resin (56%), soluble in alcohol and having the formula C20H32O4"

gum (similar to gum arabic) 30–36%

3-acetyl-beta-boswellic acid (Boswellia sacra)

alpha-boswellic acid (Boswellia sacra)

4-O-methyl-glucuronic acid (Boswellia sacra)

incensole acetate

phellandrene

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Uploaded on October 21, 2013
Taken on October 20, 2013